QZHW Fan Coil Unit. Key features. Specifications

Transcription

1 Key features High wall installation Cooling ( pipes) Low noise level Electrical heating coil ECM version for low energy consumption QZHW is a high wall fan coil unit available in sizes and many different models. This unit is easy to install like a standard fan coil: without decreasing the emission and without any extra frame, -way or -way valves and condensate pump can be mounted into the casing. The modern and appealing design of the unit in RAL 900 colour allows the use of QZHW in any environment. This unit is available with standard AC motors or low energy EC motors and in the following versions: infra-red remote control or with electronic board for Modbus management. The units are for pipe installations only. All models perform very low electric consumption and extremely quite sound levels according to the request of today s new projects. Specifications Quick Selection Cooling Entering air temperature: 7 C dry bulb - 9 C wet bulb Entering water temperature: 7 C, Δt= C Table : Standard version Size Speed Airflow (m³/h) QZHW-0 78 QZHW-0 0 QZHW Eurovent certified performances. sizes: Q=0-790 m³/h. - PCooling (total)= PHeating=... Cooling () Sound pressure Lp () 9 9 pipes change over system. Electrical heating coil. Tangential fan. EC motor for low energy consumption. Auto-extinguishing ABS casing. Washable regenerable synthetic filter. Infra red control or wall room unit control. Easy to install and maintain. Product code example High wall fan coil unit QZHW-aa-b-c-d-e Table : ECM version Size QZHW-0 QZHW-0 QZHW-0 Speed Airflow (m³/h) GB Cooling () Sound pressure Lp () ()

2 Description Condensation tray It is made from polypropylene; the outside diameter of the condensate discharge pipe is mm. Installation template A cardboard installation template is supplied with every unit to help the mounting on the wall. Casing QZHW Casing is made of auto-extinguishing ABS UL9 HB plastic with high specifications and great resistance to aging. Filter Washable-regenerable synthetic filter, readily accessible. Fan Tangential fan made of plastic. Electric motor Standard version The motor is for single phase supply and has six speeds, three of which are connected, with capacitor. The motor is fitted on sealed for life bearings and is secured on antivibration and self-lubricating mountings. Internal thermal protection with automatic reset, protection IP 0, class B. The speeds connected in the factory are indicated by, and in the following tables. ECM version Electronic motor with three phase permanent magnet brushless controlled with reconstructed current according to a BLAC sinusoidal wave. The inverter board that controls the motor operation is powered by 0 Volt, single-phase and, with a switching system, it generates a three-phase frequency modulated, wave form power supply. The electric power supply required for the machine is therefore single-phase with voltage of 0-0V and frequency of 0-0Hz. Coil It is manufactured from drawn copper tube and the aluminium fins are mechanically bonded onto the tube by an expansion process. The coil has two / inch BSP internal connections and /8 inch BSP air vent and drain. The heat exchanger is not suitable for use in corrosive atmosphere or in environments where aluminium may be subject to corrosion. The connections are on the left side facing the unit only. 970 GB ()

3 QZHW Nominal performances, standard version Heating Entering air temperature: 0 C Entering water temperature: 0 C Same water flow rate as for the cooling Cooling Entering air temperature: 7 C dry bulb - 9 C wet bulb Entering water temperature: 7 C, Δt= C Table : Nominal performances, standard version: Size 0 & 0. MODEL Speed Air flow Cooling total emission Cooling sensible emission Heating Δp Cooling Δp Heating Fan Sound power Lw Sound pressure Lp m³/h W QZHW QZHW Table : Nominal performances, standard version: Size 0 & 0. MODEL m³/h W Speed Air flow Cooling total emission Cooling sensible emission Heating Δp Cooling Δp Heating Fan Sound power Lw (*) Sound pressure Lp QZHW = Standard connected speeds. (*) = The sound pressure levels are 9 lower than the sound power levels and apply to the reverberant field of a 00 m³ room and a reverberation time of 0. sec. Table : Working conditions Max. entering water temperature Min. entering water temperature Max. rated pressure 70 C C 000 Table : Motor electrical data (max. absorption) Model 0/ 0 Hz W A 970 GB QZHW QZHW-0 0. () QZHW

4 QZHW Nominal performances, ECM version Cooling Entering air temperature: 7 C dry bulb - 9 C wet bulb Entering water temperature: 7 C, Δt= C Heating Entering air temperature: 0 C Entering water temperature: 0 C Same water flow rate as for the cooling Table : Nominal performances, ECM version: Size 0 & 0. MODEL Speed Air flow Cooling total emission Cooling sensible emission Heating Δp Cooling Δp Heating Fan Sound power Lw Sound pressure Lp (*) m³/h W QZHW ECM QZHW ECM QZHW ECM Table : Nominal performances, ECM version: Size 0 & 0. MODEL Speed Air flow Cooling total emission Cooling sensible emission Heating Δp Cooling Δp Heating Fan Sound power Lw Sound pressure Lp (*) m³/h W QZHW ECM = Standard connected speeds. (*) = The sound pressure levels are 9 lower than the sound power levels and apply to the reverberant field of a 00 m³ room and a reverberation time of 0. sec. Table 7: Working conditions Max. entering water temperature Min. entering water temperature Max. rated pressure 70 C C 000 Table 8: EC motor electrical data (Max. absorption) Model 0/ 0 Hz W A 970 GB QZHW ECM-0 0. () QZHW ECM QZHW ECM QZHW ECM

5 Coil pressure drop Legend: Qw = water flow (l/h) Δp = pressure drop () Pressure drop for mean water temperature of 0 C; for different temperatures multiply the pressure drop figure by the K correction factors in the table. Table 9: Correction factors C K GB ()

6 Acoustic Data Often sound levels are the key influencing factor in the selection of equipment. The notion sound power is often confused with the notion sound pressure. The two notions can be defined as follows: Sound power (Lw) Sound pressure (Lp) Sound power is the output required producing sound pressure waves. It is not, as such, directly measurable. Sound power is established by measuring the sound pressure on the inner surface of a sphere placed around the source. It is measured and stated in Watts. Sound power is therefore a measurement, which is not dependent on area or distance, and it is used as a basis for all acoustic data. This is the alternating pressure produced by waves from a sound source. It is a measure of the noise level or noise intensity. Sound pressure is dependent on the average absorption factor of the room, distance from the sound source, the position of the unit in the room, the occupation and is therefore not suitable for calculations of sound propagation or spread. An explanatory example: The sound power level can be compared with the heating capacity of a boiler. This capacity will remain the same regardless of the thermal characteristics of the installation. The sound pressure level can be compared with the temperature obtained in a room supplied from the boiler. Obviously, the temperature will vary depending upon the room characteristics and so it is with sound pressure. Therefore, accurate comparisons between competing equipment should always be made, in the case of the boiler, by comparing boiler capacity and in case of fan coil units by comparing the sound power levels. Conversion: Sound power level => Sound pressure level 0 Absorption surface m Sabin hou fact o ri e s a s ro =0 a= o.0 ms 0.0, of swi fice a= mm s 0, i. re a ng hot h h el r din o alls spit g ro oom al r om oom s, te s a ra d s levi =0 io s. sion tud ios stud mee ting ios a= ro o 0. ms, a= mu si c 0. the st atre ro o ms o re s s ses 00 clas e Fr 000 iel ef Sound difference DL = Lw - Lp ( db ) 0 d Unit fixed in a corner 8 0 Unit fixed into a ceiling Delivery factor Unit fixed to the wall Room volume (m ) Unit can radiate in all directions 0, Distance from the sound source in meters Example Office. m. m.7 m => Room volume : 0 m³ QZHW-0: Sound power level at low speed is 0 Absorption factor a: GB () Distance from the source : m Direction factor : DtL : db Sound pressure level : Lp = Lw(A) - L Lp = 0 - =

7 Practical guidelines Control system Precautions to be taken before and during installation Units are carefully inspected and tested prior to delivery. The water system must be carefully designed and balanced if the fan coil system is to perform correctly. The units should be installed in such a way to allow easy access for maintenance and adjustments. It is important that the unit is placed level or slopes slightly towards the condensate drain side. Sufficient slope of the drain system shall be assured for a quick condensate removal = % (min. cm/m). The inlet water connections for cooling and heating are always the lower of the coil connection. Although units equipped with water control valves have been carefully checked at the factory, it is advisable to check the tightness of all pipe connections on site using a spanner. Make sure that the condensate will drain off freely. Do not connect the drain system directly to the drainpipe of the main driptray but use the drainpipe of the auxiliary driptray for the evacuation of the condensate. It is recommended to seal the joint between the unit and the auxiliary driptray with a sealer. The distance between the air intake side and the floor or wall should be minimum 00 mm. Make sure that no shelving or furniture obstructs free air circulation. Dispose of packaging material in accordance with local requirements. Electrical connections All motors are tested prior to delivery. The voltage of the motor is stated on the identification label of each unit. The electrical wiring of the units should be done by an authorised electrician in accordance with the local regulations. The electrical heating elements must only be factory installed. The electrical installation should be of permanent type and the unit protected by means of fuses in the power supply from the mains. Incorrect field wiring will cause motor damage. Always use the same power supply circuit for the fan coil system (fan coil units, thermostats, etc...) Do not connect more than one fan coil unit to one common speed selector switch. In master/slave applications, check carefully the equipotentiality of the electrical connections. 970 GB () When the fans are not running, it is strongly advisable to ensure that the chilled water supply to the coils is automatically shut off, to prevent condensation in and on the unit. Units equipped with electrical heating elements must be connected to a regulation with permanent ventilation. Starting-up Check that the coils have been cleaned after the installation work. Check the water system and open the valves for the water supply. Check that the water connections do not leak. Open the venting screws and check that there is no air in the coils. Equalisation of the pressure drop across the whole water system is recommended. Check that the fan impeller rotates freely and in the correct direction. Run the fan at high, medium and low speed and check that no mechanical noise can be heard. Check that the unit is well secured and does not vibrate. Check the performance of the supervisory system. Maintenance Before performing any service or maintenance operations, turn OFF the main power supply. Inspect the unit at regular intervals. The frequency of cleaning the coil and the driptray depend on local conditions. The coil should be cleaned on both sides. Use a vacuum cleaner with a rubber nozzle. Work carefully to avoid damaging the coil surfaces. Check that the drainpipe is clean and not clogged. The motor bearings are permanently lubricated and do not require lubrication. The standard filters are of the washable type and should be cleaned when clogged. Check min. once a month the filter final pressure drop is recommended up to Pa. The frequency of filter cleaning or replacement is dependent on the dust content in the return air. (our recommendation: Max. month after starting-up period and further Min. every months) WARNING! The cooling and heating output of the unit will be reduced if the unit is running with clogged filters. Unit mounted electrical heating elements can influence the sound level of the units. Dirty/clogged filters will increase the sound level and are harmful to the operation and working-expenses of the units.

8 Prolonged operation with a dirty / clogged filter may lead to deterioration of the motor. To avoid breaks caused by ice, please empty the water circuit when the room temperature goes down to 0 C. Accessories Electric heater The heater is hermetically sealed and supplied inside the battery pipes and therefore can be only factory mounted. The electric heaters of the QZHW units are single phase 0V supply. The electric heater is fitted with a overheat protection. The unit is fitted with two safety thermostats: one thermostat with manual reset; one thermostat with automatic reset. Table 0: Main technical characteristics Model Nominal power () Nominal voltage (V ~) Wire section (mm ) ( wire connections) Current input (A) Recommended fuse (Type gg) for overload protection QZHW-0 QZHW-0 QZHW Max. ambient temperature for QZHW with electric coil in heating mode: C. Valve kit QZHW is always supplied with valves mounted on the unit. 970 GB ()

9 Figure : Pump unit Figure : -way valve Table : Specifications Figure : -way valve Height for vertical flow (m) Table : Characteristics Unit sizes - - DN 0 Valve (Ø) /" /" Kvs.. Water flow (l/h) depending on the length of horizontal flow m 0 m 7. l/h 7. l/h. l/h. l/h.0 l/h.7 l/h. l/h.9 l/h Electronic board Valves pressure drop Figure : Electronic board for IR remote control /or Modbus communication The electronic board can be mounted as per standard on the unit and is set to carry out different functions and adjustment modes, in order to meet the installation requirements. These modes are selected by setting the configuration dip switches on the board: Fan ON/OFF thermostatic control. Valve ON/OFF thermostatic control and continuous ventilation. Valve and simultaneous ventilation ON/OFF thermostatic control. Fan operation control depending on the coil temperature (cut-out T probe fitted), which can be activated only in heating mode or heating and cooling mode. Automatic switch of the operating mode by means of T water probe (optional). Seasonal switch by means of remote contact. ON/OFF of the fan coil by means of the remote contact (window or clock contact). Electric heater control. Legend: Qw = water flow (l/h) Δp = pressure drop () Condensate drain pump Condensate pump is supplied loose in a separate packaging. 970 GB ()

10 By activating the cut-out T probe function, the fan is stopped in winter when the coil temperature is lower than C and started when the temperature reaches C. In summer mode, the fan stops when the temperature inside the coil exceeds C and starts when it drops below 8 C. can be ordered by either infra-red remote control or Modbus communication. Infra-red remote control QZAZ-0-90 RS serial connection to manage several fan coils in Master/Slave configuration. Note when the unit is ordered with Modbus control, infra-red remote control and its receiver will not be delivered with the unit. In case there is a need for infra-red remote control, both receiver and infra-red remote control should be ordered separately. Receiver and IR remote control are supplied loose in a separate packaging. Infra-red remote control: QZAZ-0-90 Receiver for the infra-red remote control: QZAZ-0-98 The infra-red remote is delivered in the same packing when the unit is ordered with infra-red remote control. The infra-red remote control features the following functions: Switch the appliance ON and OFF. Temperature set. Set the fan speed (low, medium, high or autofan). Set the operation mode (fan only, cooling, heating). Time setting. hours ON/OFF program. Modbus communication The following connections are located on the power board: Connection for infra-red remote control receiver Connection for wall control. 970 GB ()

11 Dimensions and weights Chilled water in Hot water in Chilled water out Hot water out Mounting dimensions Table : Installation height (m) Minimum Maximum 970 GB ()

12 Packaging Table : Dimensions (mm) Size A B C Z QZHW QZHW QZHW Table : Weight (kg) Model Without Valve With valve QZHW-0 Weight packed unit QZHW-0 QZHW QZHW-0 0 Weight unpacked unit QZHW-0 QZHW-0 0 Table : Water content (l) Model l QZHW GB QZHW () QZHW-0.8.8

13 Product code High Wall Fan Coil Unit QZHW-aa-b-c-d-e Size (aa) 0, 0, 0, 0 Version (b) 0 = Basic unit = With infra-red control = With Modbus control Fitted valves (c) 0 = Without valves = -way valve = -way valve Electrical heater (d) 0 = Without electrical heater = With electrical heater Motor (e) = AC-motor = EC-motor Condensate pump QZAZ-07-bb Execution (bb) 09 = Supplied loose 9 = Factory fitted IR control For QZHW-aa--c-d-e QZAZ-0-bb Type (bb) 90 = Remote control 98 = IR-reciever, not mounted 970 GB ()