Ventilconvettori Fan coil units Ventilconvecteurs Klimatruhen. Series Zefiro. Technical Manual Cod. AER.MT.Z.GB /09

Transcription

1 Ventilconvettori Fan coil units Ventilconvecteurs Klimatruhen Series Zefiro Technical Manual Cod. AER.MT.Z.GB /09

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4 SUMMARY 1. SERIES ZEFIRO / GENERAL 1.1 Fan coil units Fan coil unit components Internal Structure Exchanger Intake air filter Casing Fan Assembly Control box Auxiliary drain MODELS and DIMENSIONS 2.1 VA- HA Models - Vertical and horizontal fan coil units with casing VB HB Models - Vertical and horizontal fan coil units with casing and accessible front air inlet VL - HL Models - Vertical and horizontal fan coil units with casing and accessible front air 2.2 inlet 2.4 VC,VD, VE,VF,HC,HD Models - Built-in fan coil units Dimensions and Weights How to order Identifying the model Selection information PERFORMANCES 3.1 Air flow Cooling capacity for three standard speeds Heating capacity for three standard speeds Cooling capacity of the direct expansion coils Pressure drops in exchangers Water content of the coils Electrical characteristics of motors Noise Emissions Power Sound level by octave band Pressure Sound level in a closed room Variation in sound pressure depending on the volume of the room and the reverberation time Variation in sound pressure according to distance Noise curves (NR) ACCESSORIES AND VARIANTS 4.1 Operating control devices TM ELMZ Instructions how to install the wall controls CSN SATH TOP MCS AS Supply Notes Heat exchangers Direct expansion exchangers BE Electric heater EH Regulation valves Valve body Actuators i

5 4.4.3 Assembly kit and lockshields Table of available accessory combinations System accessories CZ - Pair of feet CZF - Plinth with openable hatch PAE/V, PAE/H - External air shutters for vertical and horizontal models PAE/HF External air inlet connection PAEM - Motor for external air shutter PPV, Rear panels for vertical models PPHA/B- Rear panels for horizontal models PMZE Delivery plenum with circular connectors PM 90ZE Delivery elbow connector RTZE Delivery telescopic connector GFM Fixed delivery grille GF2 - Dual adjustment delivery grille PACZE - Suction intake plenum PAZE Suction intake plenum with spigots GFA Fixed suction intake grille Other accessories PSCZE Condensate drain pump FAG3 Special filter Guide to accessories and spare parts ELECTRICAL DIAGRAMS 5.1 Fan coil units motors Wiring Electrical diagrams INSTALLATION AND MAINTENANCE 6.1 Preliminary operations Models with casing Wall or ceiling fixing Hydraulic connections Electrical wirings Starting up the appliances Delivery grilles and fixing the hatches Alternative layouts Inverting the hydraulic connections Changing fan speed Maintenance Removing and cleaning the filter Inspection and/or removal of the fan assembly motor (GRV) Examples of typical installations APPENDIX Performance data 7.1 Air flows with external static pressure Heat exchange outputs Cooling outputs with water coil Heating outputs with water coil Summary graphs cooling outputs Summary graphs heating outputs Power Sound level at rated air flows Pressure Sound level Working with water glycol Concentrations of glycol Performance variations with water - glycol ii

6 1. ZEFIRO SERIES / GENERAL 1.1 Fan coil units A fan coil is an unit designed for room air-conditioning. Heating or cooling is realized by the heat exchange between the air coming in contact with the exchanger and the water flowing inside it. To make this change more effective, a fan force circulates the air across the exchanger (coil). Heat will therefore be added to or subtracted from the air in the room, depending on whether the coil receives hot or cold water from a centralised system. If sufficiently cold water enters the exchanger, the humidity in the air condenses on the exposed surfaces of the coil, thereby dehumidifying the air in the room. Compressed gas direct expansion coils can also be used to cool and dehumidify the air. The fan coil unit is fitted with a system for draining the condensed humidity. A fan coil unit must therefore guarantee: uniform exploitation of the surface of the exchanger; suitable air flows depending on operating conditions; good condensate insulation; simple condensate drainage; adjustment of water flow in the exchanger. The fan coil units in Zefiro Series feature: multi-speed motors for optimising air speed; total insulation of the surfaces the treated air comes into contact with; electronic control systems for regulation of the operation The Zefiro fancoil units can combine different types of exchangers with different types of valves for adjusting the input water and numerous electronic control systems, thereby making them particularly versatile and suitable for the most varied room conditioning requirements. Performance figures in standard operating conditions are shown in the table in chapter 3. The company also has a selection software which helps choose the most suitable fan coil unit for non-standard operating conditions. 1.1

7 1.2 Fan coil unit components (ref. mod. VA) Key: 1 Internal structure 2 Fan assembly 3 Control box 4 Heat exchanger 5 Auxiliary drain collector 6 Removable grill + cover 7 Metallic casing 8 Plastic flanks 9 Filter 1.2

8 1.2.1 Internal structure The internal structure is made from galvanised sheet metal and is 0.8 mm or 1 mm thick, depending on the purpose each part of it serves. The rear part features slots for wall-mounting. The hexagonal hole next to the water connections prevents the coil manifolds from twisting if the pipe unions are over-tightened. Main condensate collector is incorporated in fan assembly for vertical models. It can be removed independently of the fan assembly for horizontal models. Its double sloping shape allows the water to be drained when the fan coil unit is installed either horizontally or vertically. All the components are lagged with M1 class fireproof material Horizzontal drain pans are painted Exchanger The exchangers are made with aluminium fins screwed onto copper tubes. The manifolds feature ½" GF connections. All the coils are subjected to a 30 bar tightness test and are designed to withstand a maximum operating pressure of 10 bar. The Zefiro fan coil units can incorporate water circulation coils with and, when required for systems with dual input lines (hot/cold), an additional one row coil may be added. Three-row R134A or R407C direct expansion coils can also be mounted on the Silent series of fan coil units. The connections to the coolant input line comprise various diameters of copper tubes. The corrugated shape of the coil fins and the parallel circulation feature of the water or coolant compared with the direction of the air offer improved heat exchange effectiveness and efficiency. For further details and information, please consult paragraph

9 1.2.3 Intake air filter (FA) The filter is nylon (G1 class), it is housed in a metal frame. Regular filter cleaning ensures perfect performance. For special uses, filters with higher filtering characteristics, classe G3 can be supplied on request. The filters are 195 mm high while their lengths depend on the size of the fan coil unit (see following table) Size length [mm] thickness [mm] 6 VL-HL only 465X X X X X Casing (CAB) The casing is made of painted sheet metal and ABS. Front metal painted pannel is fixed to the structure with screws and can painted in various colours of the RAL range (the standard colour is RAL 9010). In case of different colours, conctact the factory for the offer and the delivery time. Heat and deformation proof ABS grilles are mounted on the delivery line. Their special chemical composition preserves their colour (RAL 9002) and long-term efficiency. The grilles are shaped in order to optimise air distribution in the room. Their press fit assembly allows them to be inverted to distribute the air in another way. Two hatches for accessing the control panel (if fitted) and for inspecting the connections and any feed valves are mounted on the sides of the fan coil unit delivery. These hatches can be fixed to the body with screws hidden by special plugs in order to prevent access being made (installation in schools, public areas, etc.) The grilles and hatches are protected to flame class UL94 HB. Hatch for accessing the control panel Plastic stopper to hide the fixing screws Grilles for outlet air in Zefiro. 1.4

10 1.2.5 Fan assembly (GRV) The fan assembly comprises a plate on which the fans and the motor are installed. The motor support brackets are damped to prevent the transmission of vibrations. The centrifugal fan impellers are made from aluminium and are directly splined to the motor shaft while the screws are made from galvanised sheet metal. The standard single-phase motors are powered at 230 V and 50 Hz; 60 Hz motors can also be supplied on request. The motors are fitted with a permanent condenser and an automatically resettable overload cut-out, and are protected by IP20 or 44 only on customer s request. The entire fan assembly is electronically balanced and can easily be removed from the fan coil unit, independently from the other components, thereby allowing inspections and extraordinary cleaning operations to be carried out. The following table shows the number of fans and the diameters of the impellers for each fan unit in the Zefiro series. Size Fan speeds wiring Autotransformer Slot Nr. of fans φ impeller [mm] 146 All fan assemblies feature six operating speeds, 3 pre-wired standard speeds and three alternative speeds which can be obtained by simply changing the electrical connections. The six speeds are obtained by using an autotransformer on Zefiro , while for models the six speeds are directly wired to the motor winding Control box The control box contains the electronic board and protects terminal boards for connection to the supply mains and to various accessories that can be installed inside it. These electronic components can also be mounted to the wall by appropriate plastic boxes. The built-in box is made of galvanised sheet metal and its top side is fixed to an ABS facade on which control devices are inserted. It is not necessary to disconnect the electronic connections of the fan assembly to move the box to the opposite side. For casing models, the control box can be accessed from the relative hatch. The box is fire protected to UL94HB and electrically protected to IP41. Zefiro fan coil serie has a number of accessories ranging from simple speed control devices to multi-function control devices, including automatic fan speeds control and valve control. Please consult paragraphs and 4.1 (cont.) for further information CSN SATH CONTROL DEVICES TOP1 ABS facade with controls sheet metal Box Unit flank 1.5

11 1.2.7 Auxiliary drain (ADPZ) The auxiliary drain is standard supplied on all fan coil units; it is made in ABS, fire protected to UL94 HB; it collects and drains the condensate formed around the valve units. Auxilary drain is the same for vertical and horizontal models. It is fitted to the fan coil side by special slots and fixed with screws; check it has been correctly installed by spraying some water onto side/collector gasket. 1.6

12 2 MODELS AND DIMENSIONS 2.1 VA - HA Models Vertical and horizontal fan coil units with casing Vertical (VA) and horizontal (HA) versions can be interchanged by simply replacing the main collector. The construction drawings are identical (cf. par. 2.5) Constructive features: front/rear swivel grilles; available in 11 sizes ( ); 2, 3 or 4 rows coils depending on size; 1 row separated coil for heating on demand for all coils; colour: plastic components RAL 9002; metallic components RAL 9010 HA VA 2.1

13 2.2 VB - HB Models - Vertical and horizontal fan coil units with casing and accessible front air inlet Vertical (VB) and horizontal (HB) versions have frontal air inlet obtained from added skirting board. They can be interchanged by simply changing the main collector. The filter is easily accessible for cleaning and maintenance through a hatch located on the lower part of the body. The construction drawings are identical (cf. par. 2.5) Constructive features: front/rear swivel grilles; available in 11 sizes ( ); 2, 3 or 4 rows coils depending on size; 1 row separated coil for heating can be added on demand for all coils; colour: plastic components RAL 9002; metallic components RAL 9010 can be directly installed to the floor HB VB 2.3 VL - HL Models - Vertical and horizontal fan coil units with casing and accessible front air inlet The construction drawings are identical (cf. par. 2.5) Constructive features: front/rear swivel grilles; available in 11 sizes ( ); 2, 3 or 4 rows coils depending on size; 1 row separated coil for heating can be added on demand for all coils; colour: plastic components RAL 9002; metallic components RAL 9010 can be directly installed to the floor or to the wall. VL 2.2

14 2.4 VC, VD, VE, VF, HC, HD Models Built-in fan coil units Zefiro Series comprises six different built-in models: four with vertical outlet and two with frontal outlet. VC VERTICAL Suction from the bottom Outlet from the top HC HORIZONTAL Suction from the back frontal outlet VD VERTICAL Frontal Suction Outlet from the top HD HORIZONTAL Suction from the bottom Frontal outlet VE VERTICAL Suction from the bottom Frontal outlet VF VERTICAL Frontal suction Frontal outlet Constructive drawings are identical (cf. par. 2.5). Constructive features: available in 11 sizes ( ); 2, 3 or 4 rows coils depending on the size; 1 row separated coil for heating can be added on demand for all coils; 2.3

15 2.5 Dimensions and Weights The following tables indicate the dimensions and weights of the various sizes of Zefiro fan coil units.. Mod. PESI (kg) MODELLI AD INCASSO MODELLI CON CABINET verticali orizzontali DIMENSIONI (mm) Mod A B C MOD CASE SUCTION OUTLET VA YES From the bottom From the top VB YES Frontal From the top VC NO From the bottom From the top VD NO Frontal From the top VE NO From the bottom Frontal VF NO Frontal Frontal HA YES From the back Frontal HB YES From the bottom Frontal HC NO From the back Frontal HD NO From the bottom Frontal

16 VERTICAL MODELS A1 = CONDENSATE DRAIN CONNECTION ø 20mm 2.5

17 In case of unit without particular controls or accessories, this quota can be reduce to 20mm (PA104) A1 = CONDENSATE DRAIN CONNECTION ø 20mm 2.6

18 In case of unit without particular controls or accessories, this quota can be reduce to 20mm (PA104) A1 = CONDENSATE DRAIN CONNECTION ø 20mm 2.7

19 A1 = CONDENSATE DRAIN CONNECTION ø 20mm legenda : : IN OUT batteria principale : IN OUT main coil : IN OUT hauptbatterie : IN OUT batterie principale : IN OUT batera principal CONNECTIONS 1/2" FEMALE 2.8

20 HORIZONTAL MODELS A1 SUCTION ASPIRAZIONE A1 A1 = = attacco CONDENSATE scarico DRAIN condensa CONNECTION Ø 16mm Ф 16mm OUTLET MANDATA CONNECTIONS ½ Female 2.9

21 2.10

22 2.6 How to order Identifying the model An example of the code required to identify and order the selected model is shown below: ZE 316 VA SX CSN SIZE MODEL VA e HA VB e HB VC e HC VD e HD VE e VF VL e HL CONNECTIONS SIDE DX = right (std) SX = left (looking at the machine when installed) ACCESSORIES Consult chapter 4 of this manual or the price list Selection information The following notes make easier to choose the right kind of fan coil unit; further details are shown in later chapters. Please contact our technical department for further information. a) The colour choice for the colour of the body, grilles and hatches Standard colours are: metallic components RAL 9010 ; plastic components RAL b) ) Choosing the position of the hydraulic connections Unless otherwise required, the hydraulic connections are on the right of the coil (right-hand connections mean the connections to the right of an observer looking at the front of the installed appliance). The fan coil unit can be supplied with left-hand connections on request and at no extra charge. It is always possible to change the position of the connections, even on location, by following the instructions shown in paragraph and in the instructions booklet supplied with each fan coil unit. c) Choosing the size and type of coil Chapter 3 of this manual is a guide to the choice of the size of fan coil unit depending on the thermodynamic requirements calculated for the room in which the appliance will be installed. It describes the air/hydraulic, thermodynamic and noise characteristics of the Zefiro appliances. There is also a selection programme for nonstandard fan coil operating conditions. It is possible to fit heat exchangers with 2, 3 or 4 on the models installed with single feed line systems (2 pipes). For dual feed line systems (4 pipes), in addition to the above coils it is also possible to mount an auxiliary coil (B1) with one row (just for heating). All coils just seen are fed by hot or cold water; direct expansion coils (BE) are also available. This type of coils can also be combined with the one-row auxiliary coil (water). For further details, please consult paragraph

23 d) Choosing the electrical heating element EH Alternatively to the additional coil B1, electrical heating elements (EH) made from low surface loading aluminium, featuring manually resettable safety thermostats can be installed. The heating elements are only mounted on coils with 2 or 3 rows, they are available with various power levels depending on the size of the fan coil and a power interface relay (EHR) must be fitted to ensure they work safely. This is supplied separately at an extra charge. Please consult paragraph 4.3 for further information. f) Choosing accessories The Zefiro range offers a wide selection of accessories which considerably increase the scope of the appliances. The whole range is described in detail in chapter 4. Some components, divided by typology, are described below. Electrical accessories for operating control In the absence of accessories, an insulated terminal board (PA104) is mounted on all Zefiro Series fan coils in order to shunt the speeds of the fan assembly and connect the unipotential conductor (PE). If any accessories are mounted, PA 104 should be replaced with a metal electrical panel containing terminals (QB) or an elementary plastic box. Zefiro fan coil units can work with accessories incorporated in the electrical control panel and with other remote accessories installed on the wall. These can be installed on the machine; in this case, BI should be added to the accessory order code. Further details are contained in paragraph 4.1 and the following ones. Hydraulic accessories All models can be fitted with: - 2 way/2 gate ON/OFF valves - 3 way/4 gate ON/OFF valves - modulating valves Check valves (lockshields) can be installed up-line from the valve assemblies. Technical details, assembly diagrams and order codes can be found in paragraph 4.4 and the following ones. Other accessories To adapt Zefiro fan coil units to the various system layouts, a wide range of various shapes and sizes of plenums, unions, panels, grilles and accessories are available on request. The technical department is able to design and construct other non-standard elements. (See paragraph 4.5 and the following ones). 2.12

24 3. PERFORMANCES This chapter illustrates the performance levels of Zefiro fan coil units in their standard operating conditions. For further operating data, please refer to the Appendix of this manual (chapter 7) or consult the selection software that can be obtained on request. 3.1 Air Flow The flow data contained in the following table were measured on the various sizes of fan coil units installed with casing, delivery grilles and a clean suction filter. The dry bulb temperature and the absolute pressure of the test room equalled 20 C and 1 atm respectively. The special profile of the grilles, aerodynamically designed in order to obtain a low cx value, produces a pressure drop and a consequent 3% decrease in load compared with fan coil units working without grilles. Consequently, the built-in models (without suction grille) and the models with casing and grilles have equivalent performance values. The fan speeds are the three standard ones out of the six available. Size MAX MED m³/h MIN The following table indicates the air flows produced by the fan coil units with static delivery pressure. These measurements simulate machine operation in the presence of pressure drops caused by ducting and the like. 3.1

25 Pressure [Pa] Size Speed MAX MED m³/h MIN MAX m³/h MED MIN MAX MED m³/h MIN MAX m³/h MED MIN MAX MED m³/h MIN MAX MED m³/h MIN MAX MED m³/h MIN

26 3.2 Cooling Capacity for three standard speeds The following tables indicate the cooling capacity (total and sensible), the flow of water circulating in the coil and the consequent hydraulic pressure drop for the various available types of coils for the various ambient temperature and relative humidity conditions and water temperatures described. The air flows treated by the units are described in paragraph 3.1. Room Temperature 27 C (B.S.) 47% Water Temperature 7 C (In) 12 C ( Out) SIZE Unit MAX MED MIN Total cooling capacity KW 0, Sensible capacity KW 0, Water flow rate l/h 166, Pressure drop kpa 1, Total cooling capacity KW 1, Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa Total cooling capacity KW Sensible capacity KW Water flow rate l/h Pressure drop kpa

27 3.3 Heating Capacity for three standard speeds The following tables indicate the heat output, the flow of water circulating in the coil and the consequent hydraulic pressure drop for the various available types of coils for the ambient temperature and water temperature conditions described. The air flows treated by the units are described in paragraph 3.1. Main Exchanger Room Temperature 20 C Water Temperature 70 C (In) - 60 C (Out) SIZE Unit MAX MED MIN Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa

28 Main Exchanger Room Temperature 20 C Water Temperature 50 C (In) 43,3 C (Out) SIZE Unit MAX MED MIN Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa Heating capacity KW Water flow rate l/h Pressure drop kpa

29 Auxiliary Exchanger Room Temperature 20 C Water Temperature 70 C (In) - 60 C (Out) SIZE Unit MAX MED MIN Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h Heating Capacity KW Water Flow rate l/h Pressure drop kpa Air flow m³/h

30 3.4 Cooling capacity of the direct expansion coils The following tables indicate the cooling capacity (total and sensitive) of the direct expansion units for different temperature and relative humidity conditions. The air flows treated by the units are described in paragraph 3.1. Room Temperature 27 C B.S. 47% Cooling Gas : R407c Evaporation Temperature 6 C SIZE Unità MAX MED MIN Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 6,4 4,6 2,5 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 12,9 9,3 5,2 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 7,5 6,0 3,5 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 6,0 4,8 2,7 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 18,8 14,4 8,5 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 15,2 11,4 6,5 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 31,1 28,6 22,8 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 26,1 23,9 18,7 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa 13,2 12,1 9,9 Total cooling capacity W Sensible capacity W Water flow rate l/h Pressure drop kpa

31 3.5 Pressure drops in exchangers The following graphs indicate the hydraulic pressure drops of the coils. The figures were measured with an average inlet water temperature of 10 C. To calculate the pressure drops through the coils with water circulating at a different temperature, multiply the pressure value calculated for a certain load by the relative correction factor shown in the following table. K corrective factor P 1,1 1 0, Middle temp. Water C Main exchanger Auxiliary Exchanger 3.8

32 3.6 Water content of the coils The following table shows the data relative to the water content of the coils mounted on the various sizes of fan coil unit. Size Main Exchanger Row content Main Exchanger Circuit content l 0, ,82 l 0,28 0,768 1,024 1,191 1,588 1,62 2,16 1,62 2,16 2,732 3,28 Additional row l 0, , Electrical characteristics of motors The following table indicates the power consumption figures of the standard motors mounted in the fan assemblies of the fan coil units powered at 230 V and 50 Hz. These figures were measured at maximum standard speed, with the fan coils fully operating, with delivery grilles and casing mounted and suction filter clean with zero static operating pressure. Size Power Input W Nominal Current A 0,12 0,12 0,15 0,19 0,19 0,38 0,42 0,6 0,6 0,68 0,82 RPM n

33 3.8 NOISE EMISSION Power sound level by octave band The power irradiated by a noise source is a measurement that is characteristic of the source itself and is not affected by external factors such as the place, distance and ear of the listener. The irradiated power is measured at various frequencies (octave bands). The total power in db(a) is measured by applying special mathematical formulas to the measured data. The following figures were the results of tests performed in a reverberation room certified according to the provisions of ISO The test instruments and procedures complied with the provisions of ISO The level of sound power of all the fan coils was determined for each operating speed as prescribed by ISO 3741, using the reference source comparison method. All the appliances were tested simulating real operating conditions, that is, with all their components fitted (delivery grilles, suction filter and casing). Power sound level Lw Size [Hz] TOT [db(a)] MAX 34,3 38,2 38,4 32,0 26,2 16,6 11,3 43,0 MED 32,6 35,0 34,5 27,8 20,8 11,5 11,4 39,0 MIN 28,5 28,4 24,4 9,1 7,1 7,2 10,2 29,0 MAX 34,5 38,5 37,6 32,6 25,5 17,3 12,2 43,0 MED 29,5 32,6 30,5 24,4 15,3 15,3 10,2 37,0 MIN 24,3 25,4 20,3 1,1 9,2 13,3 10,2 29,0 MAX 35,6 41,7 42,6 37,7 31,6 22,3 13,3 47,0 MED 31,4 36,5 34,6 29,5 20,3 9,3 9,2 41,0 MIN 28,5 29,4 24,5 16,3 6,1 5,2 14,3 31,0 MAX 36,5 41,6 42,6 35,5 30,5 19,4 13,2 46,0 MED 33,5 37,7 38,6 31,5 25,5 15,3 12,3 43,0 MIN 29,5 32,4 28,4 19,3 17,2 13,3 13,3 32,0 MAX 36,6 40,7 41,7 36,5 30,5 18,3 14,3 47,0 MED 33,6 38,5 38,6 33,5 26,4 14,2 12,3 44,0 MIN 29,5 32,5 29,4 20,4 12,2 6,2 12,2 35,0 MAX 39,6 45,7 47,6 40,6 39,7 27,5 15,3 51,0 MED 33,5 39,6 38,6 35,5 26,4 14,3 9,3 44,0 MIN 26,4 33,5 28,4 22,4 10,3 4,2 10,2 34,0 MAX 39,7 45,7 46,8 40,6 37,6 26,4 15,3 51,0 MED 34,5 39,6 38,5 35,5 25,5 15,3 11,3 45,0 MIN 28,5 35,5 28,4 22,4 16,3 11,3 11,2 34,0 MAX 48,7 53,8 53,8 50,7 49,7 43,6 33,5 61,0 MED 45,7 50,8 50,7 46,7 47,7 38,5 26,5 58,0 MIN 42,6 47,7 48,7 42,7 44,7 32,5 20,4 55,0 MAX 48,8 54,7 54,7 50,7 49,7 42,6 31,5 61,0 MED 45,7 51,7 51,8 46,8 46,7 37,5 25,5 58,0 MIN 42,6 48,7 49,8 43,6 43,6 32,6 20,3 54,0 MAX 51,8 57,8 57,9 54,7 53,7 47,7 38,6 64,0 MED 48,7 54,8 55,8 50,8 50,8 43,7 33,6 62,0 MIN 44,7 51,7 51,8 47,6 47,7 38,6 27,5 59,0 MAX 52,8 57,9 57,8 54,9 52,8 49,7 39,6 63,0 MED 46,8 51,8 51,8 47,8 47,7 38,5 28,4 58,0 MIN 43,7 48,7 49,8 43,7 44,7 32,5 22,4 53,0 3.10

34 3.8.2 Pressure Noise Level in a closed room Pressure noise level is the perception that a person has in the presence of a noise source. It depends on the volume of the room in which the sound propagates, the distance of the listener from the source of the sound and the acoustic reflections in the room (retransmission of energy). It is clear that covering the walls with sound-absorbing material (curtains, wallpaper, etc.) reduces the reflecting effect and therefore reduces sound pressure. The following pressure figures are calculated starting from the sound power measured, supposing that the fan coil unit is installed in a 100 m³ room, the reverberation time is 0.3 s, and the distance of the observer from the fan coil unit is equal to 1.5 m; a reflecting wall near the appliance is also considered. Although the results of the calculation are borne out by experience, they are not measurements and are therefore indicative. For special requirements, please consult a specialised technician. Sound pressure level at 1,5 m from the unit, at min. std speed in a room of 100 m 3, reverberating time 0,3 s, with one reflecting adjacent surface to the unit Sound pressure Lp Size [Hz] TOT [db(a)] MAX 25,9 29,8 30,0 23,6 17,8 8,2 2,9 34,6 MED 24,2 26,6 26,1 19,4 12,4 3,1 3,0 30,6 MIN 20,1 20,0 16,0 0,7-1,3-1,2 1,8 20,6 MAX 26,1 30,1 29,2 24,2 17,1 8,9 3,8 34,6 MED 21,1 24,2 22,1 16,0 6,9 6,9 1,8 28,6 MIN 15,9 17,0 11,9-7,3 0,8 4,9 1,8 20,6 MAX 27,2 33,3 34,2 29,3 23,2 13,9 4,9 38,6 MED 23,0 28,1 26,2 21,1 11,9 0,9 0,8 32,6 MIN 20,1 21,0 16,1 7,9 2,3 3,2 5,9 22,6 MAX 28,1 33,2 34,2 27,1 22,1 11,0 4,8 37,6 MED 25,1 29,3 30,2 23,1 17,1 6,9 3,9 34,6 MIN 21,1 24,0 20,0 10,9 8,8 4,9 4,9 23,6 MAX 28,2 32,3 33,3 28,1 22,1 9,9 5,9 38,6 MED 25,2 30,1 30,2 25,1 18,0 5,8 3,9 35,6 MIN 21,1 24,1 21,0 12,0 3,8-2,2 3,8 26,6 MAX 31,2 37,3 39,2 32,2 31,3 19,1 6,9 42,6 MED 25,1 31,2 30,2 27,1 18,0 5,9 0,9 35,6 MIN 18,0 25,1 20,0 14,0 1,9-4,2 1,8 25,6 MAX 31,3 37,3 38,4 32,2 29,2 18,0 6,9 42,6 MED 26,1 31,2 30,1 27,1 17,1 6,9 2,9 36,6 MIN 20,1 27,1 20,0 14,0 7,9 2,9 2,8 25,6 MAX 40,3 45,4 45,4 42,3 41,3 35,2 25,1 52,6 MED 37,3 42,4 42,3 38,3 39,3 30,1 18,1 49,6 MIN 34,2 39,3 40,3 34,3 36,3 24,1 12,0 46,6 MAX 40,4 46,3 46,3 42,3 41,3 34,2 23,1 52,6 MED 37,3 43,3 43,4 38,4 38,3 29,1 17,1 49,6 MIN 34,2 40,3 41,4 35,2 35,2 24,2 11,9 45,6 MAX 43,4 49,4 49,5 46,3 45,3 39,3 30,2 55,6 MED 40,3 46,4 47,4 42,4 42,4 35,3 25,2 53,6 MIN 36,3 43,3 43,4 39,2 39,3 30,2 19,1 50,6 MAX 44,4 49,5 49,4 46,5 44,4 41,3 31,2 54,6 MED 38,4 43,4 43,4 39,4 39,3 30,1 20,0 49,6 MIN 35,3 40,3 41,4 35,3 36,3 24,1 14,0 44,6 3.11

35 3.8.3 Variation in sound pressure depending on the volume of the room and the reverberation time. The following graph allows the variation in sound pressure to be evaluated according to the size of a room and the sound-absorbency of its walls at an observer distance of 1.5 m. A low reverberation time equals a high level of sound-absorbency. The values in db(a) obtained are added, as a correction, to those shown in the previous table Variation in sound pressure according to distance Sound pressure varies depending on the distance of the observer from the sound source; the larger the volume of the room the higher this variance is. Considering a 100 m³ room, the following graph allows the pressure values added as a correction to those shown in the table in paragraph to be calculated. 3.12

36 3.8.5 Noise curves (NR) The noise level of the appliance is often expressed using the NR index that considers the fact that a noise level may be more or less noticeable depending on the frequency at which it is emitted. Ventilation noise generally features frequencies of around Hz. Noise, or equal disturbance, or isoauditive curves are calculated from the data in table 3.8.2; these can be used to find the values of NR in the reference conditions. Size MAX NR MED MIN As regards rooms with different characteristics, after recalculating sound pressure with the help of correction graphs, the new value of NR can be found by placing the figures obtained in the following graph. 3.13

37 4. ACCESSORIES AND VARIANTS Zefiro Series fan coil units have a wide range of accessories and variants which make them extremely versatile and adaptable to the most varied operating and installation requirements. All the currently available accessories and variants are described as follows. The company can also study the most suitable solutions for special requirements 4.1 Operating control devices TM TM is a minimum temperature thermostat which prevents fan starting before the water circulating in the exchanger has reached a minimum pre-set temperature. The room will only be ventilated when it is possible for the air to be heated sufficiently, thereby eliminating that unpleasant cold sensation while the coil feed valves are being opened. The bimetallic thermostat is mounted directly onto the fins of the coil with special clips. The electrical contacts are protected by a special cable featuring a sheath and a shaped terminal for housing the thermostat. Technical specifications Opening temperature: 24 ± 3 C Closing temperature: 35 ± 3.5 C Load of contacts: 5 A 250 V AC1 Note: the accessory is not avaiable in case of Top1 HP and TOP1 0/1V HP control 4.1

38 4.1.2 ELMZ : Device for driving various fan coils with single command. It consists on three relay, each one for an operation speed. Terminal boards and relays are assembled on printed circuit. Maximum absorbed power for each motor has to be inferior to 150 W. ELMZ must be bound together to one of the control devices later described on this manual. Technical characteristics ( for one relay) Contacts Charact. Nominal Current: Max commutable voltage: Nominal Current Carrying Capacity in AC1: 16 A 400 Vac 4000 VA Bobbin Charact. Input Rated Voltage: Rated output: 230V/50-60Hz 1,2 VA NOTES Guaranteed modularity until 100 pieces; It can be only built-in type Terminal on inferior side for easier wiring Double-face board with terminals to facilitate optimal side for wiring Instructions to install the wall controls For a correct installation of the control to the wall, it is advisable to use an electric box for surface wallmounting (Max 100 X 55mm) to make the wiring connection quickly and to use the pins supplied in kit. Sample of electric box for flush wall-mounting. Sample of a correct wiring connection predisposition. 4.2

39 4.1.4 CSN: CS-NN CSN-BI CSN drives only one fan. ELMZ is the device for driving various ventilators. CSN manually controls the three running speeds of fan. First wiper permits to select running speed, the second one has three positions, OFF in central position and Summer/Winter mode set to give logic to minimum temperature thermostat TM, that can be optionally inserted. Technical Characteristics Power supply: 230 ± 10% V 50/60 Hz AC Maximum commutable current: 5 A Usable temperature limits 0-50 C Usable humidity limits % RH (in not saturated environment) Protection degree IP 40 Minimum temperature thermostat Mechanical N.A. Color RAL 9002 Dimensions CS-NN[mm] 140 x 75 x 34 NOTES It can be built-in type or wall-mounted type TM can be cut out by new jumper For more information, refer to the technical sheet inside the packaging 4.3

40 4.1.5 SATH: Electronic room thermostat, with manual speed selector and valve/s control SATHN SATH-BI SATH is an electronic room thermostat, with manual speed selector. Electronics guarantees reliability and accuracy. The terminal board of electric terminals is preset to connect minimum temperature thermostat TM (optional) to a probe set on the unit suction in order to install the thermostat into the machine build-in. SATH drives only one fan. ELMZ device is required to drive various fans. Operation logics - thermostatic control only on ventilation of valveless units - Control of input valve of heat exchanger (fan always in function suitable solution for systems with only a feeding line of fan coils) - Control of two input valves of two heat exchanger with hot and cold water flow (fan always in function suitable solution for systems with two separated feeding lines of fan coils); - Control of input valve of cold exchanger and electric resistance EH substitutive of hot coil (fan always in function) NOTE In case of use of electric resistance EH is necessary to order separately a power relay (see company code EHR) Device includes: - Selector summer/off/winter - Selector of three running speeds - Handle control for environmental temperature setup Technical characteristics Power supply: 230 ± 10% V 50/60 Hz AC Maximum dissipated power: 1 VA Temperature setting range: 5-30 C Temperature sensor: NTC 10K 25 1% Differential operating: 0,5 C Relay contact: 5A,250 V AC resistive Usable temperature limits C Usable humidity limits: % RH (in not satured envinronment) Protection degree (Level): IP 40 Minimum temperature thermostat: Mechanical N.A. Color: RAL 9002 Dimensions [mm] SATHN : 140 x 75 x

41 NOTE In case of use of electric resistance EH is necessary to order separately a power relay (see Company code EHR) NOTES - It can be built-in type or wall-mounted type - It drives simultaneously two valves (cold+hot) or cold valve and electrical resistance (cold+eh) - The electric resistance control is not give by direct command Note: it is always advisable to use the valve. In case of no valve installed and in case of built-in control, please check if the room probe fixed in the suction of the unit, doesn t be influenced by the hot or cool water present in the coil. If it happens, the probe must be placed in a better position For more information, refer to the technical sheet inside the packaging 4.5

42 4.1.6 TOP1: Electronic room thermostat with three speeds manual or automatic selector and summer/winter operation mode selector A) valve on/off configuration TOP1 TOP-1N TOP1-BI TOP1 is an electronic room thermostat for fan coils with automatic or manual selector of three running speeds and summer/winter operation mode selector. It is a complete, reliable and accurate device. The set up temperature corresponds to maximum value of neutral zone. When room temperature is higher than set point, conditioning circuit starts running. Otherwise if environmental temperature is lower than minimum temperature value of neutral zone, heating circuit is activated. Using a deep switch, inside of the machine, is possible to change the amplitude of action neutral zone from 2 C (default value) to 5 C. Operating differential between two speeds is equivalent to 1 C; hysteresis on every step is equivalent to 0.5 C. Fan switches off when demanded temperature is attained, and at the same time input valve of exchanger turns off. Moreover, by opening of a contact, the device makes possible to enlarge amplitude of neutral zone until 8 C during Sleep Mode (economy). The terminal board of electric terminals is preset to install a minimum temperature thermostat TM (optional) TOP1 can be built-in type, when required, if previously an appropriate probe is set into unit suction. The control, off-the-shelf, can delay the moment in which heating mode fan switches off. So it avoids room air stratification. TOP1 can drive only one fan. ELMZ device is necessary in order to drive various fans. Operation logic: - Control of input valve of exchanger ( suitable solution for systems with only one feeding line of fan coils) - Control of two input valves of two exchangers with hot and cold water flow (suitable solution for systems with two separated feeding lines of fan coils) - Control of input valve of cold exchanger and electric resistance (EH) substitutive of hot coil. - Manual or automatic speed selector depending on difference between room temperature and set one Device includes: - Selector ON/OFF - Four steps button for fan speed selection: minimum, medium, maximum, automatic speed - Handle control for room temperature setting B) Modulating valves configuration - TOP 1 0/10V It differs from TOP1 model for the possibility to drive modulating valves powered by 24 V AC. 4.6

43 It will be necessary to use a transformer as company code TR24 code (alternate voltage output). It is also possible to realize, on request, the configuration for electric resistance. This TOP1 version makes possible to control additional electric resistance EH power on/off (remind:a relay is required; see EHR company code). When this solution is adopted, is not possible to drive modulating valves C) model for heat pump - TOP1-HP In 2 pipes system, it differs from TOP1 model for the change over temperature as follow: Cooling: temperature water to the inlet pipe low than 18 +/-3 degrees Heating: temperature water to the inlet pipe up than 28 +/-3 degrees. Using this control, it is not possible to use TM minimum temperature thermostat to be fixed on the heating coil D) model for heat pump - TOP1 0/10V HP In 2 pipes system, it differs from TOP1 model for the change over temperature as follow: Cooling: temperature water to the inlet pipe low than 18 +/-3 degrees Heating: temperature water to the inlet pipe up than 28 +/-3 degrees. Using this control, it is not possible to use TM minimum temperature thermostat to be fixed on the heating coil Technical characteristic version A ) C) Power supply 230 ± 10% V 50/60 Hz AC. Output valve ON/OFF 230 V 50/60Hz AC. version B) D) Power supply 230 ± 10% V 50/60 Hz AC. Output modulating valves 0-10 V DC. Maximum dissipated power 1 VA Temperature setting range: 7-30 C Adjustable Neutral zone 2 o 5 C Temperature sensors: NTC 10k 25 C 1% (coo: Twater<18+/-3, heat: Twater>35+/-3 ) Usable temperature limits: 0-50 C Usable humidity limits: % RH (in not satured envinronment) Protection degree : IP 40 Speed and valves Differential operating : 0,5 C Thermic Differential for speed selection: 1 C Minimum temperature thermostat : Mechanical N.A. Input E/I for 2way system : NTC Probe Input Economy commutation: N.A. contact Input cable and probes Maximum length: 50 m sez. min. 0.5 mm 2 Color: RAL 9002 Dimensions remote control[mm] : 140 x 75 x 34 NOTES - It can be built-in or wall-mounted type - It drives two probes and TM (not TOP1 HP version) - It automatically controls running speed - Default control is set on the air, but it can be set on the water - Appropriate deep switches have to be set to distinguish 2-ways system from 4-ways one Note: it is always advisable to use the valve. In case of no valve installed and in case of built-in control, please check if the room probe fixed in the suction of the unit, doesn t be influenced by the hot or cool water present in the coil. If it happens, the probe must be placed in a better position For more information, refer to the technical sheet inside the packaging 4.7

44 TOP1 - Normal Working WINTER MODE SUMMER MODE Operating differential Room Temp. Neutral Zone 2 C TOP1 - Economy Working (amplitude of neutral zone) WINTER MODE SUMMER MODE Operating differential Room temp. NEUTRAL ZONE 4.8

45 4.1.7 MCS MCS (Multi Control System) includes an electronic board with microprocessor that can be connected indifferently to: - an infrared receiver (IRP) for an infrared remote control (IRT), -an external regulator (ETN)). -a built- in regulator (FMH) ETN and FMH controllers also include an infrared receiver for the infrared remote controller IRT. The electronic board controls also the fan starting in heating mode with a water temperature input fixed at 32 C set point through the thermostat installed onto the water coil Remote control allows to fix a timer for daily ON/OFF Possible versions are: MCS01 MCS02 MCS03 MCS04 MCS05 Infrared control MIGA + IRT + IRP Infrared control MIGA + IRT + ETN with wall thermostat Infrared control MIGA + IRT + FMH with built-in thermostat Digital control MIGA + ETN with wall thermostat Digital control MIGA + FMH with built-in thermostat Operation logics: - Control of input valve of exchanger (fan always in function suitable solution for systems with only one feeding line of fan coils) - Control of two input valves of two exchangers with hot and cold water flow (fan always in function suitable solution for systems with two separated feeding lines of fan coils) - Control of input valve of cold exchanger and electric resistance (EH) substitutive of hot coil (fan always in function) - Manual or automatical speed selector depending on difference between room temperature and set one. Technical characteristics Power supply: 230 ± 10% V 50/60 Hz AC Maximum dissipated power: 1 VA Temperature setting range: C Usable temperature limits C Usable humidity limits: % RH (in not satured envinronment) Differential operating of speeds and valves: 0,5 C Differential Thermal operating for speed selection: 2 C 4.9

46 4.10

47 4.1.8 AS Alarm Signal is an electronic control, which allows a remote monitoring of the correct working of air conditioning units motor.. It is a compact accessory, which can be easily added to any type of thermostat and/or regulation Therefore it is appropriate for a quick identification of the fault unit, where the motor doesn t work even if the air conditioning unit is powered.. The contact of the alarm signal can be normally open or normally closed On the control two led (one red and one green) indicates for the working state For other information, please see chapter SUPPLY NOTES - For every control, device remote kit version is available. - In that case electrical terminals must be wired by installer. Board is predisposed to fix terminals. Use of different colours will facilitate wiring operations. - Probes are NTC10KOhm (Negative Temperature Coefficient) type. - Board is predisposed both for left and right machine type. 4.11

48 4.2 Heat Exchanger Zefiro basic model foresees the use of a single 2, 3 or 4 rows coil depending on size, which can be fed by hot or cold water dependent of heating or cooling mode The company offers, if required, direct expansion exchangers fed by R407c, R134a cooling gas In addition to main coil an auxiliary heat exchanger can be required only for heating mode. Please remember that the lower the temperature (< 8 C) of the water to the conditioning coils is, the more efficient, as a dehumidifier, the exchanger is. High feed water coils temperatures in heating mode are advised if there are air inlet and forced air refill Moreover it is possible to have air cooling without dehumidification feeding coils by water at C and room temperature between 20 and 24 C Direct expansion exchangers BE Zefiro fan coil units can use a direct expansion coil fed with R134a or R407 C. The connections to the coolant supply line comprise stubs of copper piping of a diameter which varies according to the size of the coil (see table below) Also in this case, a 1-row battery fed by hot water with a heating or post-heating function can be added. A fan coil unit with the direct expansion coils and the additional 1-row coil can condition a room instead of the pre-existing radiator, using the same centralised heating system and a new condensing unit for conditioning. Dimensions connection pipes: IN (liquid) mm OUT (gas) mm

49 4.3 Electric Heater EH The electric heater EH is an alternative to the additional 1-row coil The electric heater comprises a core made from suitably conductive material inserted inside an aluminium structure with folded fins in order to maximise heat exchange efficiency with the forced air. This type of electric heater, unlike the incandescent wire type, does not have problems of electrical dispersion and there is therefore no danger of electric shocks deriving from accidental contact; it is also tougher and more effective. A power relay (EHR) must be used to connect the electric heater to the control systems of the fan coil unit. The company declines responsibility for malfunctions caused by the absence of this device. When the supply of the power relay (EHR) is not requested, the input cables of the heating element are connected to the terminal board of the basic panel QB; the fitter is responsible for connecting them to a suitable power relay and to the fan coil unit control systems. A manually resettable safety thermostat is fitted on each element of the electrical heater. The heat output of this heater is suitable for heating rooms in spring and autumn, for integrating heat pumps or for post-heating of fan coil units working in the conditioning mode. The technical characteristics of the heating elements depending on the size of the fan coil unit are indicated in following table Size Power STD [ W] Safety thermostats operating temperatures 308/316/ C 628/ C 840/847/1250/ C 1575/ C 4.13

50 4.4 Regulation Valves Valve body The valves are used to adjust the flow of hot and chilled air; there are two types of valve: 2 way/2 gate and 3 way/4 gate In order to keep the overall pressure drop of the system as constant as possible 3 way/4 gate valves should be used. 2 way/2 gate valves The valves are all normally closed; when the actuator is excited, the position of the valve stem changes to allow it to open. The rubber plug offers a perfect seal. Technical specifications Connectors: GM ½ Zefiro ( ) GM ¾ Zefiro ( ) Conical beat Adjustment: linear Operating pressure: Permitted fluids: Kvs: 1000 Pa max (10 bar) water (2 95 C) water with glycol max. 50% 1.6 (sizes and all B1 coils) 2.5 (sizes ) 3 way/4 gate valves The valves are all normally closed and the water by-passes the fan coil unit, while when the actuator is excited the position of the valve stem changes to allow it to open. The plug offers all the models used a perfect seal both on the direct and the corner way. The use of valves with different loss coefficients depending on the size of the fan coil unit, allows pressure drops of less than 3 m water column to be obtained. The valves can be ON/OFF or modulating. Technical specifications Connectors: GM ½ Zefiro ( ) GM ¾ Zefiro ( ) Conical beat Adjustment: linear Operating pressure: 1000 Pa max (10 bar) Permitted fluids: water (2 95 C) water with glycol max. 50% Kvs: 1.6 (size and all B1 coils) 2.5 (size ) 4.14

51 4.4.2 Actuators There are 3 types of actuators: one of the ON/OFF valve and the other two for the modulating valve (only available for the 3 way/4 gate valve). The ON/OFF actuator opens the valve by heating a thermostatic element which moves a small piston which raises or lowers (depending on the type of valve mounted) the valve system. The modulating valve stem, instead, is moved by a train of gears. Technical features ON OFF actuator Power input: Consumption: Stroke time: Thrust on plug: Operating temperature: 0 50 C Protected to: IP40 MODULATING actuator (linear mode) Power input: Consumption: Control: Stroke time: Operating temperature: 0 50 C Protected to: IP ± 10% V 50/60 Hz AC 3.0 VA operating <0.70 A starting opening 3,5 mins closing 4 mins 100N 24 ± 10% V 50/60 Hz AC 3.5 VA V opening 4,5 mins closing 4,5 mins Assembly kit and lockshields The valves are fixed to the fan coil unit using an assembly kit comprising copper pipes and brass unions. The unions are sealed with dedicated seals resistant to wear and atmospheric and chemical agents. The kit has been designed to be used on all the fan coil units (horizontal, vertical, built-in or with casing). The condensate which forms on the metal parts of the kit fed with cold water for conditioning is collected by the auxiliary collector and drained into the main condensate collector of the fan coil unit. Lockshields can be installed down-line from the adjustment valves (with prior agreement and at an extra charge); these comprise zero pressure drop check valves which isolate the fan coil unit from the rest of the system 4.15

52 The assembly of the valves on the fan coil unit comprises: - mechanical connection of the valves to the exchangers using the kit; - testing (pressurising the system to 8 bars and checking it is tight); - fixing actuators to the valve and connecting them to the electrical panel. Notes: The lock shields are supplied separately on explicit request and are not mounted. The valve kit may also be ordered separately, dismounted; please remember to specify whether the valves are right or left when ordering (referring to an observer standing in front of the fan coil unit). The codes for ordering just the kit supplied dismounted are: - V23K 1 ON/OFF valve + connectors; - V43K 2 ON/OFF valves + connectors Table of available accessory combinations The following table shows the codes to use when ordering the various layouts of valves mounted on the fan coil unit. The table also shows the description of the various layouts of the valve bodies and of the available electronic and electromechanical control systems. Please refer to paragraph 4.1 for the various kinds of operating logic. Code V22 (*) V42 (*) V23 (*) V43 (*) V23+DET2 V43+DET4 V23M V43M V23M+DET2 V43M+DET2 Configuration description one 2 way/2 gate ON/OFF valve, for 2-pipe system (1 coil feed line) two 2 way/2 gate ON/OFF valves, for 4-pipe system (2 coil feed lines) one 3 way/4 gate ON/OFF valve + kit, for 2-pipe system (1 coil feed line) two 3 way/4 gate ON/OFF valves + kit, for 4-pipe system (2 coil feed lines) one 3 way/4 gate ON/OFF valve + kit + 2 lock shields, for 2-pipe system (1 coil feed line) two 3 way/4 gate ON/OFF valves + kit + 4 lock shields, for 4-pipe system (2 coil feed lines) one 3way/4gate MODULATING valve + kit, for 2 pipes system (1 coil feed line) two 3way/4gate MODULATING valve + kit, for 4 pipes system (2 coil feed lines) one 3 way/4 gate MODULATING valve + kit + 2 lock shields, for 2-pipe system (1 coil feed line) Two 3 way/4 gate MODULATING valves + kit + 2 lock shields, for 4-pipe system (2 coil feed lines) (*) Versions available with separated kit (V22 K -V42 K - V23 K - V43 K) DET 2 / DET 4 Lock shields for 2 and 4 pipes Control device Layouts V23+ V43+ V2M+ V4M+ V22 V42 V23 V43 V2M V4M DET2 DET4 DET2 DET4 CSN SATH TOP TOP 1 0/10 V (**) (**) (**) (**) MCS (**) (**) (**) (**) supplied - not supplied ** Available if required with extra charge. 4.16

53 4.5 System accessories The constant attention to the problems connected to fan coil units installation induced the company to offer a wide range of plenums, unions and accessories of various shapes and functionalities. Their use makes Zefiro series fan coils extremely versatile and adaptable to the most varied requirements. The accessories currently available are described below; the company technical department is able to design and construct other non-standard elements. All the accessories are supplied separately at an extra charge CZ - Pair of feet This pair of feet comprises 4 parts: two brackets for the fan coil unit support, and two asymmetrical parts which follow the profile of the casing. The pair of feet can be mounted on all models with casing in order to conceal the electric cable, system piping and condensate drain when these come out of the floor or the wall. The free area between the feet allows the fan assembly to be accessed and inspected after first removing the filter. Colour: STD RAL 9002 Heigt from ground: 100 mm CZF - Plinth with openable hatch The plinth comprises two symmetrical side feet to which a hatch is hinged. It features ventilation grilles and must be opened to remove the filter. The hatch is kept in place by a push push system of opening. Colour: STD RAL 9010 Heigt by ground :100 mm Openable hatch 4.17

54 4.5.3 PAE/V, PAE/H - External air shutters for vertical and horizontal models The external air shutters allow the air flowing into the room to be adjusted. The percentage of fresh air can vary from 0 to 100% of the delivery air. Generally speaking, in public areas, the quantity of fresh air should be equal to 30 m 3 /h per person. The shutter is normally adjusted manually but it may also be powered. This second solution should be provided by the fitter; the company has dedicated servomotors (PAEM) that can be supplied separately for an extra charge. The shutter must be mounted together with the pair of feet (CZ), or alternatively with the plinth (CZF). As it can be seen in the photos, the shape of the shutter changes between vertical or horizontal version of fan coils: narrow for the horizontal model (PAE/H), wide for the vertical one (PAE/V). Colore: STD RAL 9010 PAE/V PAE/H 4.18

55 4.5.4 PAE/HF -External air inlet connection The auxiliary air intake can be installed on all the Zefiro fan coil units, with or without casing, with front suction. It comprises an infill panel with a circular flanged air inlet for connections to a hole in the wall or to a suction pipe. This auxiliary inlet can be used to add fresh air to a room or simply to increase the suction capacity of the fan coil unit. The centre-to-centre distances and the sizes of this component, relative to each size of fan coil unit are indicated in the following table. The flange is 50mm high A B C PAEM - Motor for external air shutter The motor for the external air shutter opens or closes the external air inlet and can be installed both on vertical and horizontal models. The flow of fresh air (that is, the various opening stages of the external air inlet) is always manually adjusted and is performed by pre-calibrating the angular stroke of the servomotor. The device therefore only allows the external air inlet to be opened or closed for a previously set rate of flow. Technical features Torque: Travel time: Power input: Consumption: Angular stroke: 0-90 Protected to: IP 42 4 Nm s 230 V 50/60 Hz AC 4,8 W (during stroke) 1,2 W (after stroke) 4.19

56 4.5.6 PPV Rear panels for vertical models The panels, painted in the same colour as the casing, cover the rear of the fan coil units (VA + CZ and VB models) when they are installed against glass walls or when the rear can be seen. Colour: STD RAL PPHA/B- Rear panels for horizontal models These panels, painted in the same colour as the casing, cover the rear of the horizontal fan coil units when they are installed with the rear in sight. The PPHA is mounted on models HA. The PPHB, instead, is mounted on models HB. PPHA PPHB Colour: STD RAL

57 Delivery plenum This type of accessory can only be mounted on built-in models PMZE - Delivery plenum with circular connectors The delivery plenum allows the fan coil unit to be connected to circular ducted air distribution systems. The accessory is made from galvanised sheet metal, on request and for an extra charge, it is lagged (order code COIB) to prevent humid external air from condensing on the walls when applied to fan coil units working in the conditioning mode. The plenums may have from one to three connector flanges depending on the size of the fan coil unit and they can be fixed to the wall with pressure screws and to the delivery intake by means of self-threading screws (the latter are supplied in kit form). The following table and drawing indicate the different sizes. The plenum will be supplied withou any insulation. In case you need the insulation, indicated it in the order (code coib. ) [mm] Φ flange 160 Flange heigth 60 Nr. of flanges A B C

58 4.5.9 PM90ZE - Delivery elbow connector This elbow deviates the air flow by 90, pushing the delivery of the fan coil unit to the front. It is made from galvanised sheet metal and, on request and for an extra charge, it is lagged to prevent humidity from condensing on the walls when the fan coil unit is working in the conditioning mode. The plenum is fixed to the fan coil unit inlet with self-threading screws supplied in kit form. The following table and drawing indicate the different sizes. The plenum will be supplied without any insulation. In case you need the insulation, indicated it in the order (code coib. ) [mm] A RTZE - Delivery telescopic connector This connector connects the fan coil unit delivery with a surface located at a distance varying from 101 mm to 191 mm. Its walls, on request and for an extra charge, can be lagged to prevent humid air from condensing when it is connected to a fan coil unit working in the conditioning mode. It is made from galvanised sheet metal and fixed to the outlet of the appliance with the relative holes and self-threading screws supplied in kit form. The following table and drawing indicate the different sizes. The plenum will be supplied without any insulation. In case you need the insulation, indicated it in the order (code coib. ) [mm] A B

59 GFM Fixed delivery grille This grille, made from anodised aluminium, is used to finish the outside of air delivery outlets incorporated in pieces of furniture or panels covering built-in fan coil units. The fins can be adjusted. The following table and drawing indicate the different sizes that can be used to make the housings [mm] A B GF2 - Dual adjustment delivery grille This grille, made from anodised aluminium, is used to finish the outside of air delivery outlets incorporated in pieces of furniture or panels covering built-in fan coil units. The fins can be adjusted horizontally and vertically, thereby directing the flow of air in the room. The following table and drawing indicate the different sizes that can be used to make the housings [mm] A B

60 Suction intake plenum This type of accessory can only be mounted on built-in models PACZE - Suction intake plenum The plenum allows to connect the fan coil unit to a dual suction intake system simply breaking appropriate pre-blanks. It is possible to connect the fan coil to a suction canal by breaking only the pre-blank of rear side. Otherwise by breaking the pre-blank of plenum frontal side it is possible to deviate air flow of 90. Breaking both pre-blanks it is possible to realize a mixture between renewal air and blow-by air. The device is made out of galvanised sheet metal and is fixed to the sides of the fan coil unit. The filter placed in a special housing can also be removed with the plenum fixed. The following table and drawing indicate the different sizes. 4.24

61 PAZE Suction intake plenum with spigots This plenum allows the fan coil unit to be connected to circular ducted air distribution systems; it is made from galvanised sheet metal. The plenums can have from one to three connection flanges, depending on the size of the fan coil unit, to which they are fixed with self-threading screws through the holes in the side of the appliance. As visible in the photo, the filter can also be removed with the accessory mounted, by the housing on the plenum itself. The following table and drawing indicate the different sizes [mm] Φ flange 160 flange heigth 60 Nr of flanges A B C GFA- Fixed suction intake grille The suction fixed grille, made from anodised aluminium, is used to finish the outside of air inlets incorporated in pieces of furniture or panels covering built-in fan coil units. The following table and drawing indicate the different sizes that can be used to make the housings [mm] A B

62 4.6 Other accessories PSCZE - Condensate drain pump This accessory drains the condensate from the fan coil unit in special system conditions. The condensate drain pump has an alarm and a fan coil unit stop device when the flow of water to drain is higher than allowed. Note: in case of horizontal unit HA-HC-HL with B1 auxiliary coil, it will be not possible to installed the PSCZE/BI-O PSCZE/BI-V Technical specifications Maximum rate of flow. Maximum delivery: Maximum suction: Voltage: Max. Power: 8 l/h 8 m 2 m 230 V/50 Hz 110 V 50/60 Hz 10W PSCZE/BI-O Technical specifications Maximum rate of flow. 10 l/h Maximum delivery: 6 m Maximum suction: 2 m Voltage: 230 V- 50/60 Hz Max. Power: 18 W FAG3 - Special filter The special filter has a higher filtering efficiency than the standard type (G3 instead of G1). The sizes are the same as the filter supplied standard on the fan coil units (see par 1.2.3). It can be removed and cleaned up in the same way of the standard filter. It is light-blue on one side and white on the other. In order to use it correctly, the filter must be mounted with the light-blue surface pointing towards the outside of the fan coil unit. The pressure drops induced by this type of filter differ slightly from standard. 4.26

63 4.7 Guide to accessories and spare parts The following tables summarise the accessories presented in the previous paragraphs and relate them to the models of fan coil units on which they can be installed in seriess or as an accessory. The various models of valve that can be mounted on all the types of fan coil unit are not listed; these are dealt with in paragraph 4.4. The available spare parts are also indicated. Accessory code Description VA VB HA HB VC VD VE VF Accessories for operating control CSN 3 speeds electronic selector with S/W switch (1) (1) (1) (1) (1) (1) SATH Electronic thermostat with 3 speeds sel.,s/w selector (1) (1) (1) (1) (1) (1) TOP1 Electronic regulator with S/W selector (1) (1) (1) (1) (1) (1) MCS01 Infrared control MIGA + IRT + IRP MCS02 Infrared control MIGA + IRT + ETN with wall thermostat MCS03 Infrared control MIGA + IRT + FMH with flush mounting thermostat MCS04 Infrared control MIGA + ETN with wall thermostat MCS05 Digital control MIGA + FMH with flush mounting thermostat TM (8) Low water temp. Thermostat for heat pump ELMZ master/slave Elevator module TR24 Transformer 230/24V for modulating valve models AS Running/allarm detector System accessories CZ Feet set CZF Socle with suction panel (full socle) PAE/V Ext. Air damper for vertical models (2) - PAE/H Ext. Air damper for horizontal models (3) PAE/HF External air inlet connection (7) (7) PAEM Motorization for shutter - - (2) (3) PPV Rear panel for vertical models VA+CZ - VB PPHB Rear panel for horizontal models PPHA Rear panel for horizontal models PMZE Outlet plenum with spigots (6) PM 90ZE 90 outlet plenum (6) RTZE Telescopic connector (6) GFA Fixed grilles for suction GFM Fixed grilles for outlet GF2 Double regulation alluminium fixed grilles for outlet PACZE Multi-suction plenum (4) (4) PAZE suction plenum with spigots (4) (4) COIB Plenum insulation optional unavailable HC HD (1)These types of control devices can be installed both on the wall and on the machine; in this case add BI to the accessory code when ordering; (2)Can be installed only on VC, VE models; (3)Can be installed only on HC; (4)These types of plenum cannot be installed on models with inlet at the front; (5)The required quantity should be indicated when ordering; (6) only on VC and VD models; (7) only on frontal inlet models. (8) not available with TOP1 HP and TOP1 0/10V HP 4.27

64 Accessory code Description Other accessories VA VL VB HL HA HB VC VD VE VF EH Electr. heater (only in 2 (*) and 3 rows without B1) EHR Relais for electrical resistance PSCZE Condensation drainage pump PSCZE/BI-V Condensation drainage pump factory installed vertical PSCZE/BI-O Condensation drainage pump factory installed horizontal FAG3 Special filter FLXZ22 Flexible pipes for 2 pipes L=20cm ½ FLXZ24 Flexible pipes for 2 pipes L=40cm ½ FLXZ42 Flexible pipes for 4 pipes L=20cm ½ FLXZ44 Flexible pipes for 4 pipes L=40cm ½ Spare parts B1Z-BPZ 1 to 4 rows coil AT Autotransformator GRV Fan deck CAB Cabinet without plastic grilles FDX FSX Right, left plastic side - - ADPZ Auxiliary drain pan FA Air filter GRZ Delivery plastic grilles (5) (5) (5) (5) - - SPZ Door - - Modulating Valves V2M 3 way /4 gate modulating Valve V2MK 3 way /4 gate modulating Valve, kit not mounted V4M 3 way /4 gate modulating Valve 4 pipes V4MK 3 way /4 gate modulating Valve 4 pipes,kit not mounted On off Valves V22 2 way On/Off valve set for 2 pipes systems V42 2 way On/Off valve set for 4 pipes systems V23 3 way / 4gate on/off valve 2 pipes V43 3 way / 4gate on/off valve 4 pipes V22K 2 way on/off valve for 2 pipes systems,kit not mounted V42K 2 way on/off valve for 4 pipes systems,kit not mounted V23K 3 way / 4gate on/off valve 2 pipes systems,kit not mounted V43K 3 way / 4gate on/off valve 4 pipes systems,kit not mounted DET2 Holder for 2 pipes DET4 Holder for 4 pipes HC HD optional unavailable (1) These types of control devices can be installed both on the wall and on the machine; in this case add BI to the accessory code when ordering; (2) Can be installed only on VC and VE models; (3) Can be installed only on HC model; (4) These types of plenum cannot be installed on models with frontal inlet (5) The required quantity should be indicated when ordering. 4.28

65 Serie Zefiro 5. ELECTRICAL DIAGRAMS The company s constant attention to the most varied customer requirements leads it to regularly adopt new and more effective control systems for its fancoil units. This chapter describes, solely from the functional point of view, the electric diagrams that were available at the date this technical manual was published. In following pages are present electrical outlines used by company CSN SATH TOP1/ TOP1HP TOP1 0/10 V TM EH EHR IR Vxx VxM(K) PSCZ AS 24V ELMZ TR24 Key Thermostat for fan speeds control. Summer/winter set switch gives operating logic to minimum temperature thermostat Electronic Thermostat, with manual speed selector and valves control. Thermostat electronic with automatic or manual three speeds running and summer/winter mode control Thermostat electronic with automatic or manual three speeds running and summer/winter mode control for modulating valves Minimum temperature thermostat Electrical heater Relais interfaccia di potenza per riscaldatore elettrico Electrical heater switch (CSN) ON/OFF ElectroValve Modulating valve (avaiable also in Kit) Condensate drain pump Consente un monitoraggio del corretto funzionamento del motore di unità. 24 Volt supply Control device for driving various fancoils 230 V (In) 24 V (Out) tension transformer Note: BI indicates accessory mounted on the machine 5.1

66 Serie Zefiro 5.1 Fancoil units motors wiring The same electrical diagrams can be used for all the sizes of Zefiro Serie fancoil units; the only difference is in the wiring of the three motor running speeds. On Zefiro sizes the motor is single-phase and has a single speed of rotation, the six available operating speeds are derived from a voltage autotransformer connected to the motor; the three standard speeds are selected from the six available ones. The autotransformer has a terminal board with eight clips to which the motor power input and the wires for running speeds control are connected. Instead the motors for Zefiro sizes are still single-phase, six speeds of rotation but directly wired to the internal windings of the motor itself. In this case, too, three of the six available speeds are selected. Motor A with autotransformer for Zefiro 308/1260 Motor B for Zefiro The following table contains the letters identifying the various connections to the electric motors and the colours of the wires for the various operating speeds. There are always five wires leaving the autotransformer: the common, the earth and the three speeds, the latter can be identified by different letters depending on the autotransformer terminal to which they are connected (e.g.: the red wire could be indicated on the electrical diagram with the letter d or p in the case the fan coil unit works at the minimum standard speed or at the lowest speed of the autotransformer). MOTOR A MOTOR B Faston on autotransformer. Color of connection wires Color of connection wires M M a L blue (common) white (common) i Black b 2 Black (standard max speed) Grey (standard max speed) c 3 Orange Blue m Orange d 5 Red Brown p Red e Green/Yellow (Earth) f Internal unit connecting limit g Power cable h Shutting bridge Summer =cooling mode Winter = Heating mode 5.2

67 Serie Zefiro 5.2 Electrical diagrams for the operative control of the fan coil unit with commands on the machine supplied by the company W OFF S ME CSN a b c d V1 V2 V3 L N TM TM C V1 V2 V3 230V L1 50 Hz {N CSN OFF ON V1 V2 V3 CO V1 V2 V3 TM TM L N CE E1 E2 E3 H1 H2 C1 C2 C3 C4 H3 H4 CO=FASE ALIMENTAZIONE MOTORE V1=COMANDO VELOCITA' MIN CO= MOTOR INPUT PHASE V1= MIN SPEED COMAND V2= MED SPEED COMAND V3= MAX SPEED COMMON TM= COMMON SPEED INPUT N = MOTOR INPUT COMMON CE=USCITA NEUTRO COMUNE MOTORE E1=USCITA (FASE) VELOCITA' MIN CE= COMMON NEUTRAL OUTPUT H1 H2 H3 H4 = HEATING E1= MIN SPEED (PHASE) OUTPUT E2= MED SPEED (PHASE) OUTPUT E3= MAX SPEED (PHASE) OUTPUT H1,H2,H3,H4 =HEATING C1,C2,C3,C4 =COOLING ELMZ 5.3

68 Serie Zefiro INV OFF EST SATH JUMP. IN INTERNAL PROBE JUMP. OUT EXTERNAL PROBE L V1 V2 V3 N N V1 V2 V3 N E I E/ITMTM L N COMMON MAX MED MIN IN OUT INLET PROBE t Vel. 1 Vel. 2 EST STby INV E I Vel. 3 t Vel. 1 Vel. 2 Vel. 3 EST STby INV E I L N N V1 V2 V3 N E I E/I TM TM 1 VALVE CIRCUIT L N N V1 V2 V3 N E I E/I TM TM ME a b c d Vel. 1 Vel. 2 EST STby INV E t I Vel. 3 NO VALVE CIRCUIT L N N V1 V2 V3 N E I E/I TM TM 2 VALVES CIRCUIT SATH 5.4

69 Serie Zefiro OFF ON TOP1 SPEED MIN SPEED MED SPEED MAX E/I JUMP. IN INTERNAL PROBE JUMP. OUT EXTERNAL PROBE 3 2 IN L N N V1 V2 V3 VHVC SEECTM M ON 1 OUT L N COMMON MAX MED MIN NTC 10K AIR OUT PROBE DIP switch Function On Off 1 2 E/I DELAY VENT WATER ACTIVE AIR FALSE 3 OPTIONALS NONE NONE 4 NEUTR. ZONE 5 C 2 C 5 AIR SENSOR OUTLET+AIR INLET+OFFSET 2 PIPE ONLY 6 2/4 PIPE 4 PIPE VH FUNZIONE ECONOMY TERMOSTATO DI MINIMA TOP1, TOP1-HP speed MIN speed MED speed MAX E/I 5-30 C on < JUMPER FOR < SELECT PROBE INLET in air out probe 0-10V out push botton 230 V 2 1 SW2 50/60 Hz DIP SWITCH FUNCTION ON OFF EARTH TM 1 E / I WATER AIR FAN MOTOR 230V ac 2 DELAY VENT ACTIVE FALSE 3 OPTIONAL NONE NONE OUTLET WATER PROBE T < 15 C = COOL T > 35 C = HEAT 4 NEUTRAL ZONE 5 C 2 C EV HEAT EV COOL 5 AIR SENSOR OUTLET + AIR INLET + OFFSET 6 2/4 PIPE 2 PIPE ONLY VH 4 PIPE VE + VC TA 230/24 TOP1 0/10 V, TOP1 0/10V-HP 5.5

70 Serie Zefiro AS Allarm Signal Red Running Signal Green Set corrente { 230V L1 50 Hz N L1 N C V1 V2 V3NC C NANC C NA { A { B ADJ 1 Contact A Alarm Signal OPEN OPEN Contact B Motor Running Signal OPEN CLOSE GREEN LED OFF ON RED LED OFF OFF CLOSE CLOSE ON ON UNIT IS OFF UNIT IS ON UNIT IS IN ALLARM AS 5.6

71 6. INSTALLATION E MAINTENANCE 6.1 Preliminary operations All Zefiro fan coils are delivered packed in a box together with Use and Maintenance instructions manual which summarises informations gave in this chapter and better described in this technical manual. The factory will not cover damages and/or functional defects on the units due to ambiental factors and/or atmospheric agents which could damage the components (ex. air with high salt concentration or corrosive agents). In this case we suggest you to contact us in advance and to require components with special treatments. The adhesive label placed on the outside of the packing identifies the model, the size and the direction of the hydraulic connectors of the fan coil; the codes of the accessories mounted on the appliance are also indicated. In order to prevent accidental damages, unpack the unit only at the moment of installation; mount the casing, where applicable, just when installation has finished. After unit installation, cover it to prevent the exchanger and electrical connections can be ruined by dust and dirt. Remove the packaging opening the bottom and lifting up the box Models with casing Into, in order to perform operations of installation and connection of hydraulic circuits and electrical supply, is not required to remove the component of the cabinet fixed to the body machine. To remove plastic cover repeat following actions for each side, as showed in figure below. - lift plastic cover; - unscrew safety screw; - rotate and pull softly the plastic side making lever on inferior part; - put the side in a protected place. 6.1

72 6.2 Wall or ceiling fixing Before proceeding the wall or ceiling fixing, verify the following points: - the unit baricenter (only for ceiling installation) cannot be higher than 2,8 m,to permit the air to reach the floor without any stratification effect; - the wall has to be sufficiently strong; - respect the installation distance to permit the maintenance; - No curtains or any other object must obstruct the inlet or outlet air flow;. Follow these instructions for the mounting of the unit: - mark the fixing holes position using the example of the picture below. Leave a distance of min. 180 mm (for embedded model) between the fan coil side and the wall; for case model the distance between unit side and wall must be 200 mm at least. - minimal distance from bottom side for VA, HA, VL and HL models, respectively from the floor and the wall, has to be at minimum 100 mm, to permit a proper air suction; - use 4 screws (M6 L=60) with dowels φ =8 mm. - It is always advisable the use of interception taps for the water to send to the fancoil Before the first start-up and if there are several units connected, it is advisable to open the taps one at the time to identify as soon as possible the presence of leakage. Before start-up the system check the correct drainage of the condensate from the drain pan. If needed give a slight inclination towards the discharge pipe (horizontal model). Vertical Horizontal A B Ceiling fixed fan coil, in heating mode, decrease their efficiency if installed beyond 2,80 metres of height. If necessary, please use suction plenum to lower air inlet point See the pictures below to know the suggested dimensions for installation. 6.2

73 Models with case Models without case 6.3

74 6.3 Hydraulic connections To obtain the maximum heat exchange efficiency it is important to respect the indications located on the side of the fan coil unit relative to the coil water inlet and outlet. Please remember that the appliances work with reverse current circulating water compared with the direction of the air crossing the exchanger. The inversion of the order of connectors does not affect fan coil unit operation, but it does lower heat exchange performance. The valveless appliances have ½ GF hydraulic connectors directly welded to the coil/s. The holes made on the side of the fan coil unit, in which the hydraulic connectors are put, have a shape to prevent connectors bending ; the feed pipes must be fixed with care in order to prevent exchanger manifolds bending and the risk of breaking the welds and causing leaks of water. The fan coil units with valves, instead, have ½ GM hydraulic connectors on sizes and ¾ GM on size After hydraulic pipes fixing, check all unions in the valve kit and their respective seals. For further information please consult paragraphs 2.5 and 4.4 of this manual. The tightness test is performed on the fan coil units fitted with the kit and valves mounted; the fitter must therefore make sure the valve assembly remains fixed in the same position and that there are no leaks. The condensate collector is connected to the drain line by a special plastic connector supplied with the appliance. The assembly instructions are indicated on an adhesive attached to the side of the fan coil unit. 6.4

75 6.4 Electrical wirings All Serie Zefiro fan coil work with single-phase alternate current 230V 50-60Hz Making electrical wiring, scrupulously follow the electrical diagrams attached to each appliance. The machine must be wired so that all the additional connections for operating the machine are only used on the terminal board. The company accepts no liability for electrical installations that do not comply with the wiring diagrams supplied with the machine. 6.5 Starting up the appliances Before starting fan coil unit, make sure that: - it is connected to the earth circuit and that suitable electrical protection devices have been installed; - the condensation drain line is working and the drain pan discharges correctly the condensate; - the air filter is positioned correctly; - the air delivery is not obstructed and that nothing is touching it, especially when the electric heater is installed on the fan coil unit. When the starting the system, the pipes must be vented. All the exchangers are fitted with air vents. This device is worked with a screw that can be accessed from the side of the fan coil unit for all coils. The vented air is discharged inside the appliance It is collected in the main tank and drained outside by the relative circuit. When used for the first time, the fan coil unit must work for a few hours non-stop in order to run in the fan motor before it will work at maximum efficiency Delivery grilles and fixing the hatches In the models with casing the grilles are snap-fitted to the casing. Lift up fairly strongly to remove them. The fan coil units leave the factory with the grilles positioned in such a way as to send the air to the front of the appliance. Turning the grilles by 180, the air delivery passes from front to rear. stopper For installations in public places such as schools, libraries and shopping centres, it may be necessary to forbid access to the control box and hydraulic connections. These accesses can be closed with the two special screws located on the outer edges of the hatches. After being fixed, the head of the screws is covered with a cap for aesthetic reasons. 6.5

76 6.6 Alternative layouts Some modifications to Zefiro Serie fan coil units can be made directly on site in order to change the layout while keeping the functionality and efficiency of the appliance unaltered Inverting the hydraulic connections At times it may be necessary to invert the hydraulic connections from right to left or vice-versa due to changes in requirements or incorrectly fitted water pipes. If the fan coil unit is fitted with valves ask the company for a new valve kit, depending on whether the fan coil unit is right or left. Proceed as follows: a) Unscrew the three screws fixing the control box (2) and screw them into the holes on the opposite side. It is not necessary to open the control box or disconnect the electrical connections, risking altering the internal cabling; b) dismount the valves if present; c) dismount the main coil (1) unscrewing the fixing screws on the sides, thereby making the coil/s accessible; d) unscrew the screws fixing the coil/s (3) to the sides, remove the exchanger lifting it first from the side opposite the connectors; e) after breaking the holes in the side, turn the coil 180, fit the manifold connectors into the new holes and screw up using the relative holes. f) close the old holes with insulating tape; g) fix the main tank to the sides of the fan coil unit, free the blocked drain and block the old one using a suitable silicon-based sealer; h) remount the valves, if present, using the new kit; i) fit the auxiliary coil (4) on the opposite side. RIGHT LEFT 1 Main tank 3 Heat exchanger 2 - Control Box 4 - Auxiliary coil 6.6

77 6.6.2 Changing fan speed The fans mounted on Zefiro fan coil units have six speeds, three of which are set by factory. For special requirements, the three alternative speeds can be used. To change operating speeds modify the autotransformer of the fan motors and the wiring inside the electrical panel for sizes 1575 and 1885 For details and information about which electrical connections to modify, please consult paragraph Maintenance Removing and cleaning the filter The method for removing the filter is the same for all models. In vertical and horizontal models to remove filter just push it respectively towards the bottom or the top of the units, incline it downwards and pull it out. In VB and HB models to have access to filter just open the panel, making lever on its superior side with a screwdriver. Periodic cleaning of the filter (once a month in continuous operating conditions) ensures the fan coil unit is perfectly efficient. The filter can be cleaned with a domestic vacuum cleaner or, alternatively, when there is an excessive accumulation of dirt and dust, it can be washed with warm water and a neutral detergent. Caution: before reusing the filter, make sure it is perfectly dry; do not use the fan coil unit without a filter; Inspection and/or removal of the fan assembly motor (GRV) The fan assembly can easily be removed by loosening the two fixing screws located on the sides of the fan coil unit and removing it from its housing. 6.7

78 6.8 Examples of typical installations The following prospect illustrates some typical installations of the Silent fan coil units. HA VB HB HB + PAE/HF VA+PAE/V VA VC+RTZE HC + PMZE VD + PAE/HF HC HD + RTZE H=2.80m MAX PACZE + VC + PM90ZE H=2.80m MAX PACZE + HC + PM90ZE 6.8

79 Serie Zefiro 7. APPENDIX Performance data This paragraph contains the performance data of Zefiro Serie fancoil units. Following tables and graphs allow to choose most suitable unit for one s requirements with sufficient accuracy.for operating conditions differing from rated ones, please consult the selection programme that can be obtained on request, by the company. 7.1 Air flows with external static pressure The datas refer to the unit working with the intake free, complete of casing and grilles, with the filter clean, temperature and ambient pressure equal to 20 C and bar respectively. Pressure [Pa] Size Speed MAX MED m³/h MIN MAX m³/h MED MIN MAX MED m³/h MIN MAX m³/h MED MIN MAX MED m³/h MIN MAX MED m³/h MIN MAX MED m³/h MIN

80 7.2 Heat exchange outputs Serie Zefiro Cooling outputs with water coil The following tables indicate the cooling output (total and sensitive), the flow of water circulating in the coil, the hydraulic pressure drop, the air flow achieved by Zefiro series of fancoil units. The ambient temperature and relative humidity conditions and the temperature of the circuit water are as described. Main Exchanger Room Temperature 27 C (B.S.) 47% Water Temperature 7 C (In) 12 C ( Out) SIZE unit Total cooling capacity KW 1,22 0,97 0,92 0,83 0,73 0, Sensible capacity KW 1,05 0,93 0,88 0,79 0,7 0,62 Water flow rate l/h 209,3 166,4 157,9 142,8 125,4 112,6 Pressure drop kpa 2,6 1,4 0,6 0,2 0,1 0 Total cooling capacity KW 1,53 1,43 1,27 1,2 0,93 0, Sensible capacity KW 1,24 1,18 1,05 1,03 0,78 0,73 Water flow rate l/h 262,5 246,1 217,7 205,5 159,3 152,3 Pressure drop kpa 7,2 4,7 2,9 2 1,1 0,8 Total cooling capacity KW 1,93 1,81 1,6 1,51 1,17 1, Sensible capacity KW 1,46 1,38 1,21 1,16 0,87 0,78 Water flow rate l/h 331,6 310,7 274,8 258,7 200,7 182,2 Pressure drop kpa 14,6 9,6 6 4,2 2,2 1,6 Total cooling capacity KW 2,67 2,49 2,2 1,86 1,63 1, Sensible capacity KW 2,18 2,08 1,83 1,58 1,37 1,3 Water flow rate l/h 458,9 426,5 377,9 319,6 280,1 269,4 Pressure drop kpa 8,6 5,5 3,4 2,1 1,3 1 Total cooling capacity KW 3,18 2,94 2,58 2,15 1,85 1, Sensible capacity KW 2,47 2,31 2,02 1,7 1,44 1,35 Water flow rate l/h 545,4 504,4 442,5 368,7 317,3 296,7 Pressure drop kpa 7 4,4 2,7 1,6 1 0,8 Total cooling capacity KW 4,28 3,67 3,43 3,17 2,55 2, Sensible capacity KW 3,41 2,99 2,79 2,65 2,05 1,87 Water flow rate l/h 733,8 630,1 588,4 543,9 437,3 403,8 Pressure drop kpa 24,9 13,8 9,3 6,5 3,5 2,6 Total cooling capacity KW 5,11 4,34 4,04 3,71 2,91 2, Sensible capacity KW 3,93 3,32 3,09 2,84 2,17 1,98 Water flow rate l/h 876, ,6 635,7 499,4 459,4 Pressure drop kpa 20,6 11,3 7,6 5,1 2,8 1,9 Total cooling capacity KW 5,19 4,86 4,65 4,08 3,3 3, Sensible capacity KW 4,32 4,2 4,05 3,62 2,78 2,64 Water flow rate l/h 890,5 834,7 797,8 699,2 566,1 540,8 Pressure drop kpa 35,1 22,8 15,9 9,9 5,5 4,4 Total cooling capacity KW 6,3 5,88 5,6 4,86 3,87 3, Sensible capacity KW 4,93 4,72 4,52 3,93 3,04 2,88 Water flow rate l/h 1080,1 1008,3 960,7 833,9 663,9 633,4 Pressure drop kpa 29,5 19,3 13,4 8,1 4,4 3,5 Total cooling capacity KW 7,22 6,82 6,5 5,76 5,11 4, Sensible capacity KW 5,69 5,48 5,25 4,75 4,11 3,32 Water flow rate l/h 1239,6 1170,4 1114,5 988,8 876,7 723,1 Pressure drop kpa 14,8 9,8 6,9 4,3 2,9 1,7 7.2

81 Serie Zefiro 1885 Total cooling capacity KW 10,25 9,35 8,33 7,58 6,99 6,14 Sensible capacity KW 8,26 7,54 6,77 6,13 5,64 4,88 Water flow rate l/h 1758,6 1603,9 1428,8 1300,2 1199,1 1053,2 Pressure drop kpa 31,9 21,2 13,9 9,6 7 4, Heating outputs with water coil Main Exchanger Room Temperature 20 C Water Temperature 70 C (In) - 60 C (Out) SIZE unit Heating capacity KW 2,94 2,62 2,3 2,13 1,79 1, Water flow rate l/h 258,2 230,2 202,3 187,3 157,4 139 Pressure drop kpa 3,9 2,4 1,5 1 0,6 0,5 Heating capacity KW 3,68 3,43 3,03 2,84 2,25 2, Water flow rate l/h 323,7 301,8 266,7 249,9 198,2 180,5 Pressure drop kpa 7,9 5,3 3,4 2,5 1,3 0,8 Heating capacity KW 4,27 3,95 3,46 3,24 2,52 2, Water flow rate l/h 374,6 346,7 303,9 284, ,4 Pressure drop kpa 13,6 9,3 5,9 4,2 2,1 1,6 Heating capacity KW 6,42 5,94 5,19 4,35 3,8 3, Water flow rate l/h 564,5 522, , ,7 Pressure drop kpa 9,2 6,2 3,8 2,2 1,4 1 Heating capacity KW 7,43 6,81 5,9 4,9 4,24 4, Water flow rate l/h 651,8 597, ,4 372,3 357,5 Pressure drop kpa 7,1 4,9 2,9 1,7 1,1 0,9 Heating capacity KW 9,81 8,26 7,64 7 5,51 5, Water flow rate l/h 861, ,7 615,2 484,1 443,7 Pressure drop kpa 24,7 14,1 9,5 6,5 3,4 2,4 Heating capacity KW 11,37 9,46 8,71 7,94 6,17 5, Water flow rate l/h 997,9 830,8 764,7 696,9 541,4 493,4 Pressure drop kpa 19,3 11 7,5 5,2 2,6 1,8 Heating capacity KW 12,29 11,43 10,83 9,32 7,37 7, Water flow rate l/h 1079,8 1003,8 951,8 819,1 647,5 615,8 Pressure drop kpa 36,8 24,7 17,5 10,6 5,5 4,2 Heating capacity KW 14,98 13,37 12,63 10,76 8,38 7, Water flow rate l/h ,7 1109, ,2 697,7 Pressure drop kpa 29,5 19,9 14,2 8,5 4,3 3,2 Heating capacity KW 16,8 15,75 14,9 13,04 11,44 9, Water flow rate l/h 1474,9 1382,6 1307,9 1144,4 1003,8 815,2 Pressure drop kpa 15 10,4 7,4 4,7 3 1,6 Heating capacity KW 22,11 20,71 18,51 16,7 15,2 13, Water flow rate l/h 1941,8 1818,2 1624,5 1465,9 1333,6 1158,1 Pressure drop kpa 31,8 22,1 14,6 9,8 7 4,6 7.3

82 Serie Zefiro Main Exchanger Room Temperature 20 C Water Temperature 50 C (In) 43,3 C (Out) SIZE unit Heating capacity KW 1,71 1,52 1,34 1,24 1,04 0, Water flow rate l/h 222,5 198,4 174,3 161,3 135,6 119,7 Pressure drop kpa 3,2 1,9 1,2 0,8 0,5 0,4 Heating capacity KW 2,16 2,02 1,78 1,67 1,33 1, Water flow rate l/h 281,9 262,9 232, ,6 Pressure drop kpa 6,6 4,4 2,8 2 1,1 0,7 Heating capacity KW 2,52 2,33 2,05 1,92 1,49 1, Water flow rate l/h 328,8 304, ,3 194,4 176,4 Pressure drop kpa 11,6 7,9 5 3,5 1,8 1,3 Heating capacity KW 3,78 3,49 3,05 2,56 2,24 2, Water flow rate l/h 492,3 455,7 398,1 334, ,4 Pressure drop kpa 7,7 5,1 3,1 1,8 1,1 0,8 Heating capacity KW 4,37 4,02 3,48 2,89 2,51 2, Water flow rate l/h 570,3 523,4 453,7 377,2 326,4 313,5 Pressure drop kpa 6 4,1 2,5 1,4 0,9 0,7 Heating capacity KW 5,78 4,88 4,51 4,13 3,26 2, Water flow rate l/h 753,8 635,6 588,2 538,8 424,6 389,3 Pressure drop kpa 20,8 11,8 8 5,4 2,8 2 Heating capacity KW 6,71 5,6 5,15 4,7 3,65 3, Water flow rate l/h 874,7 728,9 671,1 611,9 475,9 433,8 Pressure drop kpa 16,3 9,3 6,4 4,4 2,2 1,5 Heating capacity KW 7,24 6,73 6,38 5,49 4,35 4, Water flow rate l/h 942,8 876,8 831,7 715,9 566,8 539,2 Pressure drop kpa 30,8 20,6 14,5 8,7 4,5 3,4 Heating capacity KW 8,84 7,89 7,46 6,36 4,96 4, Water flow rate l/h 1151,8 1028,7 971,8 828,5 646,2 612,5 Pressure drop kpa 25 16,7 11,9 7,1 3,6 2,7 Heating capacity KW 9,9 9,28 8,79 7,7 6,76 5, Water flow rate l/h 1289, ,2 879,6 715 Pressure drop kpa 12,6 8,7 6,2 3,9 2,5 1,4 Heating capacity KW 13,04 12,22 10,93 9,87 8,99 7, Water flow rate l/h 1698,3 1591, ,7 1169,8 1016,5 Pressure drop kpa 26,5 18,4 12,1 8,1 5,7 3,7 7.4

83 Serie Zefiro Auxiliary Exchanger Room Temperature 20 C Water Temperature 70 C (In) - 60 C (Out) SIZE unit Heating capacity KW 2,18 1,93 1,72 1,6 1,38 1, Water flow rate l/h 191,5 169,7 151,1 140,6 121,3 108,1 Pressure drop kpa 7 5,1 3,9 3,7 3 2,7 Heating capacity KW 2,04 1,93 1,73 1,64 1,45 1, Water flow rate l/h 179,6 169,7 152,4 155,6 127,4 117,3 Pressure drop kpa 6,1 5,1 3,9 3,8 3 2,8 Heating capacity KW 2,04 1,93 1,73 1,64 1,45 1, Water flow rate l/h 179,6 169,7 152,4 155,6 127,4 117,3 Pressure drop kpa 6,1 5,1 3,9 3,8 3 2,8 Heating capacity KW 3,6 3,36 3 2,82 2,51 2, Water flow rate l/h 316,5 295,1 263,6 247,6 220,3 212,1 Pressure drop kpa 22,9 19,1 14,6 11,9 10,8 11,3 Heating capacity KW 3,6 3,36 3 2,82 2,51 2, Water flow rate l/h 316,5 295,1 263,6 247,6 220,3 212,1 Pressure drop kpa 22,9 19,1 14,6 11,9 10,8 11,3 Heating capacity KW 5,25 4,54 4,24 4 3,5 3, Water flow rate l/h 461, ,6 375,9 307,7 284,2 Pressure drop kpa 8, ,4 3,6 3,5 Heating capacity KW 5,25 4,54 4,24 4,28 3,5 3, Water flow rate l/h 461, ,6 375,9 307,7 284,2 Pressure drop kpa 8, ,4 3,6 3,5 Heating capacity KW 6,36 5,98 5,72 5,2 4,28 4, Water flow rate l/h 558,7 525,6 502,7 457,2 376,5 359,5 Pressure drop kpa 11,3 9,7 8,3 6,5 4,6 4,1 Heating capacity KW 6,36 5,98 5,72 5,2 4,28 4, Water flow rate l/h 558,7 525,6 502,7 457,2 376,5 359,5 Pressure drop kpa 11,3 9,7 8,3 6,5 4,6 4,1 Heating capacity KW 7,67 7,29 6,97 6,46 5,83 4, Water flow rate l/h 674,2 640,4 612,4 568,1 512,6 436,7 Pressure drop kpa 19,3 16,6 14,4 11,8 9,7 7,3 Heating capacity KW 9,1 8,62 7,41 7,25 6,88 6, Water flow rate l/h 800,2 758,1 651,9 637,9 605,4 621,7 Pressure drop kpa 39,3 33,5 27,5 23,5 20,5 15,9 7.5

84 Serie Zefiro 7.3 Summary graphs COOLING OUTPUTS The following summary graphs indicate heating outputs for the various sizes of fancoil units according to different air flows. The curves for each size refer to the type of coil: 2 rows, 3 rows, 4 rows, 1 additional row. The reference thermodynamic conditions are shown below: Cooling Capacity Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.6

85 Serie Zefiro Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.7

86 Serie Zefiro Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.8

87 Serie Zefiro Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.9

88 Serie Zefiro Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.10

89 Serie Zefiro Room temperature 27 C Water temperature 7 C (In) - 12 C (Out) 7.4 Summary graphs HEATING OUTPUTS The following summary graphs indicate the heating outputs for the various sizes of fan coil units according to different air flows. The curves for each size refer to the type of coil: 3 rows, 4 rows, 1 additional row. The reference thermodynamic conditions are shown below: Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.11

90 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.12

91 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.13

92 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.14

93 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.15

94 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) 7.16

95 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) auxiliary coil 7.17

96 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) auxiliary coil 7.18

97 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) auxiliary coil 7.19

98 Serie Zefiro Room temperature 20 C Water temperature 70 C (In) - 60 C (Out) auxiliary coil. 7.5 Power Sound level at rated air flows The power irradiated by a noise source is a measurement that is characteristic of the source itself and is not affected by external factors such as the listener s ear, the place and the distance of the listener. The data refers to the unit working with the inlet free with casing, grilles and filter Power Sound level Lw Size [Hz] TOT [db(a)] 1 37,6 41,6 42,7 36,9 32,5 23,6 14,7 47,0 MAX 34,3 38,2 38,4 32,0 26,2 16,6 11,3 43,0 308 MED 32,6 35,0 34,5 27,8 20,8 11,5 11,4 39,0 4 30,3 32,6 31,1 22,9 15,4 9,6 8,9 36,0 MIN 28,5 28,4 24,4 9,1 7,1 7,2 10,2 29,0 6 28,1 25,5 21,4 5,4 6,1 8,1 9,1 27,0 1 37,0 41,9 42,0 37,6 34,2 23,3 14,7 47,0 MAX 34,5 38,5 37,6 32,6 25,5 17,3 12,2 43, ,4 35,6 34,5 29,4 20,4 14,3 12,2 40,0 MED 29,5 32,6 30,5 24,4 15,3 15,3 10,2 37,0 5 25,4 28,5 24,4 11,2 11,3 13,3 10,2 31,0 MIN 24,3 25,4 20,3 1,1 9,2 13,3 10,2 29,0 1 39,6 45,6 45,6 42,6 37,6 29,5 18,3 51,0 MAX 35,6 41,7 42,6 37,7 31,6 22,3 13,3 47, ,4 38,6 38,5 33,5 26,4 15,3 11,2 43,0 MED 31,4 36,5 34,6 29,5 20,3 9,3 9,2 41,0 5 28,5 30,5 27,5 19,3 9,2 5,2 11,2 33,0 MIN 28,5 29,4 24,5 16,3 6,1 5,2 14,3 31,0 7.20

99 Serie Zefiro Power Sound level Lw Size [Hz] TOT [db(a)] 1 39,6 44,6 45,7 39,6 36,5 25,4 16,3 50,0 MAX 36,5 41,6 42,6 35,5 30,5 19,4 13,2 46,0 628 MED 33,5 37,7 38,6 31,5 25,5 15,3 12,3 43,0 4 32,5 35,5 35,5 28,4 21,4 14,2 13,2 40,0 MIN 29,5 32,4 28,4 19,3 17,2 13,3 13,3 32,0 6 29,5 29,4 25,4 15,3 17,2 13,3 12,2 31,0 1 39,5 43,7 45,7 39,6 36,5 25,4 16,2 50,0 MAX 36,6 40,7 41,7 36,5 30,5 18,3 14,3 47,0 634 MED 33,6 38,5 38,6 33,5 26,4 14,2 12,3 44,0 4 32,5 36,5 35,6 29,5 21,3 9,2 12,2 41,0 MIN 29,5 32,5 29,4 20,4 12,2 6,2 12,2 35,0 6 28,5 31,5 26,4 18,2 10,3 7,2 13,2 33,0 1 43,7 49,7 49,8 44,6 46,7 34,5 22,4 56,0 MAX 39,6 45,7 47,6 40,6 39,7 27,5 15,3 51, ,6 42,6 42,6 37,6 32,5 20,4 12,2 48,0 MED 33,5 39,6 38,6 35,5 26,4 14,3 9,3 44,0 5 27,5 34,5 30,6 28,4 15,2 7,2 13,2 37,0 MIN 26,4 33,5 28,4 22,4 10,3 4,2 10,2 34,0 1 43,7 49,7 49,8 44,7 43,7 34,5 21,4 55,0 MAX 39,7 45,7 46,8 40,6 37,6 26,4 15,3 51, ,6 42,6 42,6 37,6 31,5 20,3 13,3 48,0 MED 34,5 39,6 38,5 35,5 25,5 15,3 11,3 45,0 5 29,5 34,6 31,4 28,4 17,3 11,3 12,2 37,0 MIN 28,5 35,5 28,4 22,4 16,3 11,3 11,2 34,0 1 51,8 56,9 56,8 53,8 51,8 48,7 39,5 64,0 MAX 48,7 53,8 53,8 50,7 49,7 43,6 33,5 61, MED 45,7 50,8 50,7 46,7 47,7 38,5 26,5 58,0 MIN 42,6 47,7 48,7 42,7 44,7 32,5 20,4 55,0 5 36,5 41,6 40,6 36,5 32,5 19,4 13,2 47,0 6 34,5 39,6 37,6 33,5 26,5 14,3 11,2 44,0 1 51,7 56,8 56,9 53,7 51,7 46,6 36,6 63,0 MAX 48,8 54,7 54,7 50,7 49,7 42,6 31,5 61, MED 45,7 51,7 51,8 46,8 46,7 37,5 25,5 58,0 MIN 42,6 48,7 49,8 43,6 43,6 32,6 20,3 54,0 5 36,5 42,6 42,6 37,5 32,4 21,4 14,3 48,0 6 34,5 39,7 38,7 35,5 27,5 18,3 12,3 45,0 1 53,7 58,9 59,9 55,9 54,8 49,8 41,6 66,0 MAX 51,8 57,8 57,9 54,7 53,7 47,7 38,6 64, MED 48,7 54,8 55,8 50,8 50,8 43,7 33,6 62,0 MIN 44,7 51,7 51,8 47,6 47,7 38,6 27,5 59,0 5 41,6 47,6 49,7 42,7 42,6 31,6 21,3 54,0 6 36,6 43,6 45,6 38,6 35,6 24,5 15,3 49,0 1 53,9 59,8 59,8 57,8 54,8 53,8 42,6 66,0 MAX 52,8 57,9 57,8 54,9 52,8 49,7 39,6 63, ,8 54,8 54,9 51,8 50,7 43,7 33,6 60,0 MED 46,8 51,8 51,8 47,8 47,7 38,5 28,4 58,0 MIN 43,7 48,7 49,8 43,7 44,7 32,5 22,4 53,0 6 39,7 44,7 45,8 39,7 40,6 26,4 20,3 51,0 7.21

100 Serie Zefiro 7.6 Pressure Sound level Pressure Sound level is the perception that a person has in the presence of a noise source. Pressure data are calculated the sound power measured, supposing that the unit is installed in a 100 m³ room, the reverberation time is 0.3 s, and the distance between the observer and the fan coil unit is equal to 1.5 m; a reflecting wall near the appliance is considered. The data refers to the unit working with the inlet free with casing and grilles. Sound pressure level at 1,5 m from the unit, at min. std speed in a room of 100 m 3, reverberating time 0,3 s, with one reflecting adjacent surface to the unit Pressure Sound level Lp TOT Size [Hz] [db(a)] 1 29,2 33,2 34,3 28,5 24,1 15,2 6,3 38,6 MAX 25,9 29,8 30,0 23,6 17,8 8,2 2,9 34,6 308 MED 24,2 26,6 26,1 19,4 12,4 3,1 3,0 30,6 4 21,9 24,2 22,7 14,5 7,0 1,2 0,5 27,6 MIN 20,1 20,0 16,0 0,7 1,3 1,2 1,8 20,6 6 19,7 17,1 13,0 3,0 2,3 0,3 0,7 18,6 1 28,6 33,5 33,6 29,2 25,8 14,9 6,3 38,6 MAX 26,1 30,1 29,2 24,2 17,1 8,9 3,8 34, ,0 27,2 26,1 21,0 12,0 5,9 3,8 31,6 MED 21,1 24,2 22,1 16,0 6,9 6,9 1,8 28,6 5 17,0 20,1 16,0 2,8 2,9 4,9 1,8 22,6 MIN 15,9 17,0 11,9-7,3 0,8 4,9 1,8 20,6 1 31,2 37,2 37,2 34,2 29,2 21,1 9,9 42,6 MAX 27,2 33,3 34,2 29,3 23,2 13,9 4,9 38, ,0 30,2 30,1 25,1 18,0 6,9 2,8 34,6 MED 23,0 28,1 26,2 21,1 11,9 0,9 0,8 32,6 5 20,1 22,1 19,1 10,9 0,8-3,2 2,8 24,6 MIN 20,1 21,0 16,1 7,9 2,3-3,2 5,9 22,6 1 31,2 36,2 37,3 31,2 28,1 17,0 7,9 41,6 MAX 28,1 33,2 34,2 27,1 22,1 11,0 4,8 37,6 628 MED 25,1 29,3 30,2 23,1 17,1 6,9 3,9 34,6 4 24,1 27,1 27,1 20,0 13,0 5,8 4,8 31,6 MIN 21,1 24,0 20,0 10,9 8,8 4,9 4,9 23,6 6 21,1 21,0 17,0 6,9 8,8 4,9 3,8 22,6 1 31,1 35,3 37,3 31,2 28,1 17,0 7,8 41,6 MAX 28,2 32,3 33,3 28,1 22,1 9,9 5,9 38,6 634 MED 25,2 30,1 30,2 25,1 18,0 5,8 3,9 35,6 4 24,1 28,1 27,2 21,1 12,9 0,8 3,8 32,6 MIN 21,1 24,1 21,0 12,0 3,8-2,2 3,8 26,6 6 20,1 23,1 18,0 9,8 1,9-1,2 4,8 24,6 1 35,3 41,3 41,4 36,2 38,3 26,1 14,0 47,6 MAX 31,2 37,3 39,2 32,2 31,3 19,1 6,9 42, ,2 34,2 34,2 29,2 24,1 12,0 3,8 39,6 MED 25,1 31,2 30,2 27,1 18,0 5,9 0,9 35,6 5 19,1 26,1 22,2 20,0 6,8 1,2 4,8 28,6 MIN 18,0 25,1 20,0 14,0 1,9 4,2 1,8 25,6 1 35,3 41,3 41,4 36,3 35,3 26,1 13,0 46,6 MAX 31,3 37,3 38,4 32,2 29,2 18,0 6,9 42, ,2 34,2 34,2 29,2 23,1 11,9 4,9 39,6 MED 26,1 31,2 30,1 27,1 17,1 6,9 2,9 36,6 5 21,1 26,2 23,0 20,0 8,9 2,9 3,8 28,6 MIN 20,1 27,1 20,0 14,0 7,9 2,9 2,8 25,6 7.22

101 Serie Zefiro Sound pressure level at 1,5 m from the unit, at min. std speed in a room of 100 m3, reverberating time 0,3 s, with one reflecting adjacent surface to the unit Pressure Sound level Lp Size [Hz] TOT [db(a)] 1 43,4 48,5 48,4 45,4 43,4 40,3 31,1 55,6 MAX 40,3 45,4 45,4 42,3 41,3 35,2 25,1 52, MED 37,3 42,4 42,3 38,3 39,3 30,1 18,1 49,6 MIN 34,2 39,3 40,3 34,3 36,3 24,1 12,0 46,6 5 28,1 33,2 32,2 28,1 24,1 11,0 4,8 38,6 6 26,1 31,2 29,2 25,1 18,1 5,9 2,8 35,6 1 43,3 48,4 48,5 45,3 43,3 38,2 28,2 54,6 MAX 40,4 46,3 46,3 42,3 41,3 34,2 23,1 52, MED 37,3 43,3 43,4 38,4 38,3 29,1 17,1 49,6 MIN 34,2 40,3 41,4 35,2 35,2 24,2 11,9 45,6 5 28,1 34,2 34,2 29,1 24,0 13,0 5,9 39,6 6 26,1 31,3 30,3 27,1 19,1 9,9 3,9 36,6 1 45,3 50,5 51,5 47,5 46,4 41,4 33,2 57,6 MAX 43,4 49,4 49,5 46,3 45,3 39,3 30,2 55, MED 40,3 46,4 47,4 42,4 42,4 35,3 25,2 53,6 MIN 36,3 43,3 43,4 39,2 39,3 30,2 19,1 50,6 5 33,2 39,2 41,3 34,3 34,2 23,2 12,9 45,6 6 28,2 35,2 37,2 30,2 27,2 16,1 6,9 40,6 1 45,5 51,4 51,4 49,4 46,4 45,4 34,2 57,6 MAX 44,4 49,5 49,4 46,5 44,4 41,3 31,2 54, ,4 46,4 46,5 43,4 42,3 35,3 25,2 51,6 MED 38,4 43,4 43,4 39,4 39,3 30,1 20,0 49,6 MIN 35,3 40,3 41,4 35,3 36,3 24,1 14,0 44,6 6 31,3 36,3 37,4 31,3 32,2 18,0 11,9 42,6 Calculated NR noise rating Size NR

102 Serie Zefiro 7.7 Working with water - glycol Concentrations of glycol Glycol is a substance that when added to water, prevents hydraulic circuits from freezing and breaking. The following table indicates the percentages (in weight and volume) of glycol to add to the water in order to reduce its freezing point. Freezing point C % in weight % in volume , , , , , , Performance variations with water - glycol The water/glycol mixture has higher specific weight and viscosity values than natural water and such as to affect the heat output of the fan coil unit. To obtain the same performance as natural water, the rate of flow of the mixture and the head of the pumps must normally be increased in order to make up for the greater pressure drop. The following two graphs indicate the corrective pressure drop and rate of flow coefficients Pressure drop correction coefficient 50% 40% 10% 30% 20% % glicole in weight 0% 7.24

103 Serie Zefiro Water/glycol mixture rate of flow correction coefficient x % glicole in weight 7.25

104 Technical data shown in this booklet are not binding. The Company shall have the right to introduce at any time whatever modifications considered necessary to the improvement of the product