Air magic NTD500 Neutral Temperature Dehumidifier Air magic HRV500 Heat Recovery Ventilation. designed for radiant cooling systems.

Transcription

1 Air magic NTD500 Neutral Temperature Dehumidifier Air magic HRV500 Heat Recovery Ventilation designed for radiant cooling systems User s Manual

2 CONTENTS 2 Chapter 1 GENERAL INFORMATION page 4 Chapter 2 TECHNICAL SPECIFICATIONS page 6 Chapter 3 DEHUMIDIFICATION PERFORMANCE TABLE page 7 Chapter 4 AVAILABLE STATIC PRESSURE (ASP) CURVES page 8 Chapter 5 DRAWINGS (NTD500) page 9 Chapter 6 OPERATING PRINCIPLE page 11 Chapter 7 ROOM AIR DISTRIBUTION (DEHUMIDIFICATION ONLY) page 12 Chapter 8 HYDRAULIC DIAGRAM page 14 Chapter 9 WIRING DIAGRAM page 15 Chapter 10 TECHNICAL SPECIFICATIONS (HRV500) page 16 Chapter 11 AVAILABLE STATIC PRESSURE (ASP) CURVES (HRV500) page 17 Chapter 12 DRAWINGS (HRV500) page 18 Chapter 13 WIRING DIAGRAM (HRV500) page 20 Chapter 14 ELECTRICAL CONNECTIONS BETWEEN NTD500 AND HRV500 page 21

3 CONTENTS 3 Chapter 15 OPERATING MODES (NTD500 WITH HRV500) page 22 Chapter 16 FUNCTIONS page 23 Chapter 17 BASICS OF ROOM AIR DISTRIBUTION page 25 Chapter 18 GENERAL AIRFLOW DIAGRAMS page 26 Chapter 19 AVAILABLE STATIC PRESSURE (ASP) CURVES (NTD500 WITH HRV500) 19.1 DAMPERS IN RECIRCULATION POSITION (NTD500 WITH HRV500) 19.2 DAMPERS IN HRV POSITION (NTD500 WITH HRV500) page 28 page 29 Chapter 20 DRAWINGS (NTD500 WITH HRV500) page 30 Chapter 21 ACCESSORIES 21.1 SILENCER 21.2 SILENCER ASSEMBLY 21.3 INLET ADAPTER 21.4 INLET ADAPTER ASSEMBLY page 33 page 35 page 37 page 38 Chapter 22 INSTALLATION CLEARANCES page 39

4 Chapter 1 DESCRIPTION 4

5 Chapter 1 GENERAL INFORMATION 5 Radiant Cooling And Heating Systems provides a range of air treatment unit for the HVACR industry. This user s manual pertains to the neutral temperature (isothermal) dehumidifiers air magic NTD500. The air magic range of dehumidification and ventilation systems has been specifically designed and manufactured for use in the residential and light commercial buildings. Their main functions are to control the relative humidity level, provide ventilation (HRV module require) and increase the Indoor Air Quality (IAQ) and comfort of the occupants. The units are specifically designed to work in combination with radiant cooling and heating systems. The air magic 800 range of unit integrates with the control magic climate control platform offered by. The air magic NTD500 differs from traditional dehumidifiers because are able to control the relative humidity maintaining the temperature of the supplied air, neutral with the room (isothermal). The air magic NTD500 units also feature an exclusive convective integration function that, when necessary, integrates the cooling and heating effect of the radiant panels, by supplying cooler air (in cooling mode) or warmer air (in heating mode), in order to rapidly obtain the desired thermal and hygrometric conditions. In addition, the air magic NTD500 units feature a free-cooling function that makes it possible to mitigate the overheating effect due to solar radiation during the winter. During the design of the air magic NTD500 neutral temperature dehumidification units, particular attention was paid to reduce the power consumption and ambient noise levels. air magic devices can be ducted making it possible to be installed inside of buildings: in plenum ceilings or mechanical rooms. IMPORTANT NOTE: The air magic NTD500 units may not be installed outdoors or in places exposed to the elements! The air magic NTD500 unit can be combined with the HRV module (optional), air magic HRV500 to create a complete air handling system for radiant cooling application. The additional HRV module is equipped with built-in motorized damper and exhaust blower that enable total or partial ventilation: from total air renewal (100% ventilation) with heat recovery to full recirculation (0% ventilation). The efficiency of the cross flow heat exchanger (passive) can easily exceeds 60%, especially during partial recirculation. The air magic 500 device features several operating functions: Dehumidification (at neutral temperature) Convective integration function (heating and cooling) Heat recovery ventilation (require HRV module air magic HRV500) Free-cooling (require HRV module air magic HRV500) For more information read Chapter 16 IMPORTANT NOTE: The correct model should be selected based on the number of people occupying the conditioned environment rather than its dimensions, as listed in the technical specifications table, calculated at specified conditions. Target number of people (NTD1200): 70 Outdoor air: 90 F - 50% R.H. As a reference, minimum ventilation per person following the ASHRAE standard (ventilation guidance): schools 15 CFM per person offices 20 CFM per person hospital 25 CFM per person offices 20 CFM Metabolic activity: 1.2 met Average Body weight: 154 lbs Clothing: 0.6 clo Average radiant temperature: 74.3F Air speed: < 0.34 f/s

6 Chapter 2 TECHNICAL SPECIFICATIONS 6 Water removal* pints/day 158 Refrigeration power consumption* kw 4.4 Refrigeration output* kw 2.3 The following ambient conditions in indoor environments are required for proper operation of the air magic NTD500 unit dehumidifier: Min temperature: 50 F Max temperature: 100 F Min relative humidity: 20 % Max relative humidity: 80 % THERMAL SPECIFICATIONS Nominal Airflow CFM 470 Max. available static pressure (S3 - High Speed) inch of w.c Max available static pressure (S2 - Medium Speed) inch of w.c. 0.4 Max available static pressure (S1 - Low Speed) inch of w.c Nominal water flow (60 F) GPM 2.5 Water circuit loss of head feet of head 6.7 Refrigerant gas quantity (R410a) oz Sound power level db(a) 49 Sound pressure level (at 3.28 ft.) db(a) 40 Coil water temperature in cooling mode Min water temp: 45 F Max water temp: 75 F Coil water temperature in heating mode Min water temp: 75 F Max water temp: 130 F ELECTRICAL SPECIFICATIONS Rated power consumption* W 700 Max. power consumption (compressor + blower speed 3) W 900 Max. power consumption blower speed 3 W 200 Rated Amps absorbed* Amps 3.1 Max. Amps. absorbed Amps 4.2 Dust and water protection rating IP 44 Power supply VAC / Ph / Hz 110 / 1+N / 60 WEIGHTS AND DIMENSIONS Height inch 14 Width inch 27 Depth inch 34 ¼ Weight lbs. 133 *At the following conditions: room supply air at 80 F / 65% R.H., coil supply water temperature 60F

7 Chapter 3 DEHUMIDIFICATION PERFORMANCE TABLE 7 Dehumidifier performance is a function of: - ambient temperature - relative humidity - refrigerated water temperature The performances indicated in the chart refer to the following conditions: AMBIENT TEMPERATURE 79 F WATER TEMPERATURE RELATIVE HUMIDITY 55% 65% 64 F 103 pints/day 124 pints/day 59 F 129 pints/day 745 pints/day 53 F 72 pints/day 158 pints/day Airflow: Water flow: 500 CFM 2.5 GPM AMBIENT TEMPERATURE 75 F 64 F 77 pints/day 93 pints/day 59 F 96 pints/day 118 pints/day 53 F 114 pints/day 141 pints/day Maximum sensitive heat output in winter seasons based on indoor temperature and pre-heating coil water supply temperature WATER TEMP. INDOOR TEMPERATURE 68 F 72 F 75F 82F 95 F 9,500 Btu/h 8,200 Btu/h 7,200 Btu/h 4,400 Btu/h 104 F 12,900 Btu/h 11,200 Btu/h 10,200Btu/h 7,500 Btu/h 113 F 16,000 Btu/h 14,700 Btu/h 13,300 Btu/h 10,900 Btu/h 122 F 19,100 Btu/h 17,700 Btu/h 16,700 Btu/h 13,900 Btu/h 131 F 22,500 Btu/h 22,100 Btu/h 19,800 Btu/h 17,000 Btu/h Sensible heat input (in heating mode) required by the pre-heating coil of the dehumidifier module, in function of the indoor temperature to maintain outlet air temperature neutral (same indoor temperature). Outside temperature: 32 F Coil supply water temperature: 104 F Airflow: 500 CFM Sensible heat output (HRV damper set 100% in ventilation) INDOOR TEMPERATURE 68 F 72 F 75 F 82 F 9,500 Btu/h 10,200 Btu/h 11,200 Btu/h 12,900 Btu/h

8 Chapter 4 SUPPLY BLOWER (ASP) AVAILABLE STATIC PRESSURE [NTD500] (1.6) 350 (1.4) AVAILABLE STATIC PRESSURE in Pa (Inch w.c.) 300 (1.2) 250 (1.0) 200 (0.8) 150 (0.6) 100 (0.4) 50 (0.2) (59) 200 (117) 300 (177) 400 (235) 500 (294) 600 (353) 700 (412) 800 (470) 900 (530) 1000 (588) 1100 (647) 1200 (706) AIRFLOW in m 3 /h (CFM) S1 - LOW SPEED S2 - MEDIUM SPEED S3 - HIGH SPEED

9 Chapter 5 DRAWINGS [NTD500] 9 anchoring brackets anchoring brackets return inlet supply outlet air relief valve water coil return outlet anchoring brackets anchoring bracket RJ45 connector supply outlet electric board cover cable feedthroughs water coil supply inlet moisture discharge outlet return inlet SUPPLY SIDE AND CONNECTIONS SIDE CONNECTION SIDE AND RETURN SIDE

10 R10 Chapter 5 26 DRAWINGS [NTD500] , ,5 33, ,5 64, ,6 ROOM AIR RETURN TOP VIEW ROOM AIR SUPPLY ,5 111, ,5 341,5 33,75 33, ,5 535,5 64,5 64, , ,5 33, , , ,7 26,8 R10 51,6 275,7 26,8 R10 51,6 275,7 26,8 354 R10 51, , ,5 42, , ROOM AIR ROOM AIR ROOM AIR RETURN RETURN RETURN SUPPLY SIDE VIEW CONNECTIONS SIDE VIEW RETURN SIDE VIEW

11 Chapter 6 OPERATING PRINCIPLE 11 The air magic NTD500 dehumidifier works according to the following principle. The humid air (room air return) extract from the room, through a high-efficiency blower [5] crosses the air filter [1] where the suspended dust particles are separated and eliminated from the air. The air continues through a finned pre-treatment coil [2] that is supplied with the same water circulating in the radiant panel closed loop [10]. This cause a preliminary air temperature drop in order to induce high relative humidity (air saturation). In the next step, the air passes through the evaporator [3] to further lower the air temperature below the dew point. This intense cooling cycle causes the condensation of the water vapor of the air. The resulting water is collected in a specific tank and expelled through the drain. After passing through the evaporator, the air has a low water content and its temperature is below that of the ambient. The air then travels through the condenser coil [4] and is heated until reaching isothermal (neutral temperature air) conditions. The air magic NTD5200 features an unique operation mode: CONVECTIVE INTEGRATION. The radiant cooling (or heating) effect of the radiant ceiling system is integrated by a supplemental convective cooling effect (or heating). The radiant circuit water is pumped through the dehumidification unit and its water flow is modulated by controlling the solenoid valves [9A]. This allows to shift 1. AIR FILTER ROOM AIR RETURN 2. AIR PRE-TREATMENT COIL 3. EVAPORATOR 4. AIR CONDENSER A 5. BLOWER 7 9B 6. COMPRESSOR 7. THERMAL EXPANSION VALVE 8. WATER CONDENSER from an isothermal condition to an additional air cooling (or air heating) convective integration. In cooling mode (only), the DEHUMIDIFICATION function can also be combined with CONVECTIVE INTEGRATION (cooling). In this case the heat produced in the refrigeration cycle is largely dissipated by the cold water flowing through the additional condenser [8] connected in series with the air condensed [4]. The solenoid valve [9B], controlled by the climate control system (control magic), opens to allow the cold water from the hydronic radiant ceiling system to circulate through the water condenser ROOM AIR SUPPLY 9A. PRE-TREATMENT SOLENOID VALVE 9B. WATER CONDENSER SOLENOID VALVE 10. WATER SUPPLY 11. WATER RETURN [8]. By controlling the water flow, the supply air temperature can be regulated at a temperature a few degree below the room temperature (below neutral temperature). In heating mode (only) with the FREECOOLING function, the valves [9A] and [9B] are shut to supply fresh external air into the environment, while the CONVECTIVE INTEGRATION function fully opens the valves [9A] and [9B] to intake hot water and heat the room return air and supply air a few degrees above the room temperature (above neutral temperature).

12 Chapter 7 ROOM AIR DISTRIBUTION [DEHUMIDIFICATION ONLY] 12 SUPPLY FROM DUCTS AND/OR CEILING PLENUM The unit air magic NTD500, unless combined with the HRV module air magic HRV500, works only as a dehumidifier at neutral temperature or below ambient temperature when set in CON- VECTIVE INTEGRATION mode. The unit can be installed ceiling mounted or floor freestanding. The air magic NTD500 units, are able to overcome the air pressure losses of suspended ceiling plenum and supply/return ducts. Air distribution through plenum or ducts are the most appropriate and may also coexist as shown in the examples to the side. Figure 1 - NEUTRAL TEMPERATURE DISPLACEMENT DISTRIBUTION A Since the dehumidifier is designed only for the extraction of ambient humidity, there are no particular requirements for air distribution. Humidity, in fact, is a pressure and tends to self balancing among various zones, without any ducting. Air naturally moves from areas of higher pressure to areas of lower pressure and the only condition necessary for the migration of moisture between zones is the presence of natural flow opening (e.g. door gaps). Figure 2 - NEUTRAL TEMPERATURE DISPLACEMENT DISTRIBUTION B

13 Chapter 7 ROOM AIR DISTRIBUTION [DEHUMIDIFICATION ONLY] 13 The air magic NTD500 units can be ducted allowing installation also in dedicated areas as well as in mechanical rooms external to the conditioned space for easier maintenance. IMPORTANT NOTE: INSTALLATION MUST ALWAYS BE INDOORS WITH THE UNIT PRO- TECTED FROM THE ELEMENTS. Figure 3 - MIXED AIR DISTRIBUTION

14 Chapter 8 HYDRAULIC DIAGRAM 14 ray magic ray magic ray magic The water supply line for the air magic NTD500 model must be independent, separate from the manifolds, and sized for the specific water flow required (2.5 GPM). It can be branched both upstream or downstream form the mixing valve of the secondary loop and, if necessary, equipped with a pump that can be controlled by the control magic radiant cooling and heating electronic control unit. No motorized valves are needed because they are already built into the units (water flow regulation). THERMAL- COOLING GENERATION air magic NTD500

15 Chapter 9 WIRING DIAGRAM 15 NO COM NC A1 A2 NO COM NC A1 A2 NO COM NC A1 A2 NO COM NC A1 A2 GND L1 FUSE 1A COM V1 V2 V3 Y1 G G0 Y2 G G0 A1 A2 COMPRESSOR C NO C NO BLOWER C1 NO1 NO2 NO3 C4 NO4 NO5 C5 TRANSFORMER 110V 24V - RJ11 JACK GND N GND N L1 L1 GND N Vmax Vmin N N L1 L1 Y3 G G0 IDC1 ID1 IDC1 ID2 IDC1 ID3 IDC1 ID4 IDC1 ID5 IDC1 ID6 RS485 SERIAL BUS GND + PRE-TREATMENT SOLENOID VALVE INTEGRATION SOLENOID VALVE POWER SUPPLY HRV BLOWER HRV MOTORIZED DUMPER DEHUMIDIFICATION VENTILATION CONVECTIVE INTEGRATION HRV HEATING/COOLING BLOWER SPEED G G0 B1 B2 B3 B4 GND Y1 Y2 Y3 GND ID1 ID2 ID3 ID4 ID5 ID6 IDC1 SUPPLY AIR PROBE SUPPLY WATER PROBE EVAPORATOR PROBE CONDENSER PROBE

16 Chapter 10 TECHNICAL SPECIFICATIONS (HRV500) 16 Technical specifications of the Heat Recovery Ventilation (HRV) module air magic HRV500 MODEL air magic HRV500 Heat recovery efficiency with primary / exhaust ratio 1/1 % 57 Heat recovery efficiency with primary / exhaust ratio 0.75/1 % 70 Rated power consumption* W 200 Nominal airflow CFM 500 Max. available static pressure (S3 - High speed) Inch of w.c Ventilation head loss Inch of w.c. 0.3 Recirculation head loss Inch of w.c. 0.2 Height inch 13.9 Width inch Depth inch Weight lbs. 99.2

17 Chapter 11 AVAILABLE STATIC PRESSURE (ASP) CURVES (HRV500) (1.6) AVAILABLE STATIC PRESSURE in Pa (inc of w.c.) 350 (1.4) 300 (1.2) 250 (1.0) 200 (0.8) 150 (0.6) 100 (0.4) 50 (0.2) (59) 200 (117) 300 (177) 400 (235) 500 (294) 600 (353) 700 (412) 800 (470) 900 (530) 1000 (588) 1100 (647) 1200 (706) AIRFLOW in m 3 /h (CFM) S1 - LOW SPEED S2 - MEDIUM SPEED S3 - HIGH SPEED

18 Chapter 12 DRAWINGS (HRV500) 18 room air return inlet anchoring bracket anchoring bracket anchoring bracket outside air inlet anchoring brackets anchoring bracket anchoring bracket exhaust air outlet optional exhaust air outlet anchoring bracket moisture drainage ceiling installation electric board cover moisture drainage air supply plenum for connection with dehumidifier cable passthroughs outside air inlet room air return inlet SUPPLY SIDE AND EXHAUST / CONNECTION SIDE OUTSIDE AIR SIDE AND ROOM AIR RETURN SIDE

19 36 Chapter 12 65, DRAWINGS (HRV500) 983, ,5 24, ,5 108, OUTSIDE AIR ,5 ROOM AIR RETURN ,5 24, , ,5 EXHAUST AIR , , ,5 983,5 354 OUTSIDE AIR ,5 24, TOP VIEW ,5 654, ,5 24, ,5 ROOM AIR RETURN SIDE VIEW ,5 ROOM AIR SUPPLY , ,5 354 EXHAUST AIR , ,5 SUPPLY SIDE VIEW EXTERNAL AIR SIDE VIEW ,5 64, , ,5 983,5 983, ,5 128,5 65, ,5 24, , ,5 OUTSIDE AIR ,5 320, , , ,5 320, , ,5 654,5 654,5 654,5 EXHAUST AIR SIDE VIEW

20 Chapter 13 WIRING DIAGRAM (HRV500) 20 The recovery unit air magic HRV500 is powered and controlled by the electronic board on the dehumidifier air magic NTD500. Electrical connections entail wiring the seven lines exiting the dehumidifier terminal board to that of the recovery unit, taking care to connect the wires according to their names. The recovery unit is already set to supply an airflow less to or equal to intake volume. DAMPER IMPORTANT NOTE: Excessive air output could cause a pressure drop in the zones and give rise to a number of problems, which decrease the efficiency of the units. BLOWER HRV BLOWER HRV DAMPER Vmax Vmin TE N V1 V2 V3 Y3 G G

21 Chapter 14 ELECTRICAL CONNECTIONS BETWEEN NTD500 AND HRV NO COM NC A1 A2 NO COM NC A1 A2 NO COM NC A1 A2 NO COM NC A1 A2 A1 A2 C NO C NO GND L1 FUSE 1A COM V1 GND + - COMPRESSOR V2 V3 Y1 G G0 Y2 G G0 BLOWER RJ11 JACK C1 NO1 NO2 NO3 C4 NO4 NO5 C5 TRANSFORMER 24V GND N L1 GND N Vmax Vmin N N L1 L1 Y3 G G0 IDC1 ID1 IDC1 ID2 IDC1 ID3 IDC1 ID4 IDC1 ID5 IDC1 ID6 RS485 SERIAL BUS HRV DUMPER BLOWER MOTOR 110 VAC 110 VAC G G0 B1 B2 B3 B4 GND Y1 Y2 Y3 GND ID1 ID2 ID3 ID4 ID5 ID6 IDC HI800 ELECTRIC BOARD GND N V1 V2 V3 Y3 G G RR800 ELECTRIC BOARD GND N L1 GND N Vmax Vmin Y3 G G0 THIS CONNECTIONS MUST BE MADE BY THE INSTALLER POWER SUPPLY 110V - 60 Hz 110V PRE-TREATMENT SOLENOID VALVE INTEGRATION SOLENOID VALVE GND N Vmax Vmin HRV MOTORIZED DUMPER Y3 G G0 DEHUMIDIFICATION VENTILATION CONVECTIVE INTEGRATION HRV HEATING/COOLING BLOWER SPEED SUPPLY AIR PROBE SUPPLY WATER PROBE EVAPORATOR PROBE CONDENSER PROBE

22 Chapter 15 OPERATING MODES (NTD500 WITH HRV500) 22 Adding the heat recovery ventilation air magic HRV500 module create a truly compact air treatment unit with extra features described hereafter. 1 ROOM AIR RETURN RECIRCULATION FUNCTION Operating mode diagrams to the side ROOM AIR SUPPLY A B ROOM AIR RETURN HRV FUNCTION 1 OUTSIDE AIR EXHAUST AIR 2 9A B ROOM AIR SUPPLY 1. AIR FILTER 2. PRE-TREATMENT COIL 3. EVAPORATOR 4. AIR CONDENSER 5. BLOWER 6. COMPRESSOR 7. THERMAL EXPANSION VALVE 8. WATER CONDENSER 9A. PRE-TREATMENT SOLENOID VALVE 9A. WATER CONDENSER SOLENOID VALVE 10. WATER SUPPLY 11. WATER RETURN 12. TWO-WAY MOTORIZED DAMPER 13. CROSS-FLOW HEAT EXCHANGER 14. EXHAUST BLOWER

23 Chapter 16 OPERATING FUNCTIONS (NTD500 AND NTD500+HRV500) 23 DEHUMIDIFICATION FUNCTION (air magic NTD500 or air magic NTD500 + HRV500) This function is used exclusively during the summer. Dehumidification is activated by a specific bus command (Monobus) with RS485 serial connection. Alternatively, the function can be activated by closing the dry contact [DEHUMIDIFICATION] indicated in the wiring diagram (see Chapter 9 and 14). At reception of command, the blower is started followed by the compressor after two minutes. Dehumidification is performed by activating the internal refrigeration circuit that, in tandem with the hydronic circuit, possesses high dehumidification efficiency, thus ensuring neutral temperature room air supply regulated by the modulating valve of the per-treatment coil. The hydronic circuit uses the same cooling water of the radiant panels. Dehumidification is controlled on the basis of set humidity levels or dew point threshold. This action guarantees comfortable hygrometric conditions and high cooling efficiency of the panels. Please keep in mind that panel surface temperature is variable and it is controlled in function of the room dew point; therefore, panel efficiency is highest if humidity levels are kept in check. The table below contains optimal relative humidity values and dew point temperature in function of the type of building. BUILDING TYPE RELATIVE HUMIDITY DEW POINT TEMP. RESIDENTIAL 55% - 65% 60 F - 62 F HOTELS 55% - 60% 59 F - 61 F OFFICES 50% - 55% 57 F - 60 F STORES 55% - 60% 57 F - 59 F HOSPITALS 55% - 60% 59 F - 61 F CONVECTIVE INTEGRATION FUNCTION (air magic NTD500 or air magic NTD500 + HRV500) This function consist in the convective integration of the radiant effect of the ceiling panels with air that is gently supplied from the dehumidifier at temperature slightly above (heating) or below (cooling) the room air temperature. The convective integration function is activated by a specific bus command (Monobus) with RS485 serial connection. In alternative, the function can also be activated by closing the dry contact [CON- VECTIVE INTEGRATION] indicated in the wiring diagram (see Chapter 9 and 14). COOLING MODE CONVECTIVE INTEGRATION + DEHUMIDIFI- CATION This operation engages and opens the internal solenoid valves that regulates the supply water flus into the water condenser and the pre-treatment coils. A large portion of the heat produced by the refrigeration circuit during dehumidification is transferred to the cold water of the radiant system, thus allowing to supply air at a temperature lower that the room temperature. CONVECTIVE INTEGRATION + HRV The convective integration function can also be set for the HRV function. As in the previous case, the valve connected to the pre-treatment coils is opened, thus increasing cold water intake to cool down the incoming air at temperatures lower than room air temperature. HEATING MODE CONVECTIVE INTEGRATION OR CONVECTIVE INTEGRATION + HRV The convective integration function in heating mode acts on the unit's internal valves, opening them to full hot water intake capacity, thus providing an air output with temperatures above room air temperature.

24 Chapter 16 OPERATING FUNCTIONS (NTD500 AND NTD500+HRV500) 24 HRV FUNCTION (only: air magic NTD500 + HRV500) The HRV function is related to the combination of the air magic HRV500 with the air magic NTD500. Connecting the HRV module upstream from the dehumidifier air return, creates a compact air treatment station with heat recovery from the exhaust air. The dehumidifier itself reduces internal air moisture, but this add-on module also allows a supply of make-up clean outside air. The air can also be pre-treated (convective integration function) and its level of humidity reduced (dehumidification function) to ensure maximum comfort. Air ventilation can be total or partial (with recirculation) by manually adjusting the damper to the appropriate opening. HRV function is activated by specific bus command (Monobus) with RS485 serial connection. In alternative, the HRV function may also be activated by closing the dry contact [HRV] indicated in the wiring diagram (see Chapter 9 and 14). HEATING AND COOLING MODES HRV The exhaust and supply air blowers are activated and the two way damper mechanism (recirculation and ventilation) built into the air magic HRV500 unit is activated to close the recirculation bypass and open the ventilation damper. In addition, the internal solenoid valves modulates in order to obtain neutral supply air. COOLING MODE HRV + CONVECTIVE INTEGRATION During particular conditions, the HRV function can be used with the cold convective integration feature. The valves of the plate heat exchanger and of the pre-treatment coil are opened to allow an increase of cold water intake, thus allowing incoming air supply at temperatures below neutral air temperature. HEATING MODE HRV+ CONVECTIVE INTEGRATION During particular environmental conditions, the HRV function can be used with the hot convective integration feature. The valves of the plate heat exchanger and of the pre-treatment coil are opened to allow an increase of hot water intake, thus allowing incoming air supply at temperatures above neutral air temperature. FREECOOLING FUNCTION (only: air magic NTD500 + HRV500) Freecooling is activated by a specific bus command (Monobus) and serial connection RS485. This is mostly a winter function when solar radiation overheats environments despite the relatively mild outside temperatures. This function, according to a temperature differential that can be set in regards to set of zones, shut-off hot water intake to the unit by means of its internal valves. The output temperature is no longer adjusted to maintain neutral air but, by intake of cool outside air through the crossflow heat exchanger, allows a supply of cooler room incoming air (in compatibility with outside temperature) to decrease thermal loads inside zones treated.

25 Chapter 17 BASICS OF ROOM AIR DISTRIBUTION 25 Inside a closed space, occupants and operating electrical equipment, produce heat and airborne pollutant particles that are released into the air. Therefore, both people and equipment can be considered heat sources able to activate natural hot air movements, which can be compared to virtual ducts, that push pollutants upward. HVAC systems based on displacement ventilation use these vertical natural convection flows as a mechanism for transporting ambient air, thus obtaining maximum performance with significant energy savings. Incoming air is released at low speeds (~ 100 FPM) from air outlets set near the flooring, and naturally pushes ambient air full of volatile pollutants towards the ceiling vents. Mixed distribution induces re-mixing of the pollutants present in zones, thus employing - to properly clean air - double the amount of airflow used by a displacement ventilation system. Displacement obtains maximum performance during all seasons in air conditioning systems combined with air treatment, as proposed by the technology Radiant Cooling And Heating Systems. In this mode, air is output at neutral temperature, equal to that of comfort, exclusively with HRV and DEHUMIDIFICATION functions enabled, given that the control of thermal loads is performed by the radiant panels. Hence, air can be supplied at lower speeds to drastically reduce displacement (~ 80%) and achieve a correct ambient stratification with consequential exploitation of the piston effect across the full mass of air.

26 Chapter 18 GENERAL AIRFLOW DIAGRAM 26 DUCTS AND / OR CEILING PLENUM The dehumidifier air magic NTD500 [1], combined with the air magic HRV500 module [2], become a complete air treatment system that can provide neutral air dehumidification, cold and hot air convective integration and heat recovery ventilation. The room air distribution type recommended in conjunction with the use of radiant ceiling panels, is neutral air displacement [Figures 1, 2 and 3]. In many cases, the space above the ray magic panels can act as a plenum for the exhaust air intake (when air-tightness and insulation conditions exist), with air slots possibly located in the perimeter above windows. Figure 1 - NEUTRAL AIR DISPLACEMENT DISTRIBUTION A 2 1 This yields various advantages: reduction of ducting costs and space conceals exhaust grilles with air inlet slots (which may contain air filters) directly intakes hot air produced by the windows to avoid its distribution into the environment reduces the need of primary air due to greater ventilation efficiency (e V ) 2 1 Also in a mixed distribution [Figure 4] the space above the suspended ceiling can be used as exhaust air plenum as well as valuable space for ducting. Figure 2 - NEUTRAL AIR DISPLACEMENT DISTRIBUTION B

27 Chapter 18 GENERAL AIRFLOW DIAGRAM 27 The best combination of limited ducting space, cost saving and overall efficiency can be seen in figure 3. This figure represents a neutral air displacement system with dropped ceiling plenum for exhaust air intake and return air through a raised-floor air plenum system (messana ayro) with fresh air supplied through a series of floor vents, distributed across the entire flooring surface. This type of distribution, ideal for offices, allows full exploitation of suspended ceilings and raised-floor for the passage of wires and allows a more capillary air distribution. This leads to less airflow per vent and decreases the airflow perception while increasing overall comfort. Figure 3 - NEUTRAL AIR DISPLACEMENT DISTRIBUTION C Figure 4 - MIXED AIR DISTRIBUTION

28 Chapter 19 PERFORMANCE CURVES OF NTD500 WITH HRV500 MODULE 28 Chapter 19.1 DAMPERS IN RECIRCULATION POSITION (NTD500 WITH HRV500) 400 (1.6) 350 (1.4) AVAILABLE STATIC PRESSURE In Pa (inch of w.c.) 300 (1.2) 250 (1.0) 200 (0.8) 150 (0.6) 100 (0.4) 50 (0.2) (59) 200 (117) 300 (177) 400 (235) 500 (294) 600 (353) 700 (412) 800 (470) 900 (530) 1000 (588) AIRFLOW in m 3 /h (CFM) S1 - LOW SPEED S2 - MEDIUM SPEED S3 - HIGH SPEED

29 Chapter 19 PERFORMANCE CURVES OF NTD500 WITH HRV500 MODULE 29 Chapter 19.2 DAMPERS IN HRV POSITION (NTD500 WITH HRV500) 400 (1.6) AVAILABLE STATIC PRESSURE In Pa (inch of w.c.) 350 (1.4) 300 (1.2) 250 (1.0) 200 (0.8) 150 (0.6) 100 (0.4) 50 (0.2) (59) 200 (117) 300 (177) 400 (235) 500 (294) AIRFLOW in m 3 /h (CFM) 600 (353) 700 (412) 800 (470) 900 (530) 1000 (588) S1 - LOW SPEED S2 - MEDIUM SPEED S3 - TOP SPEED

30 Chapter 20 DRAWINGS (NTD500 WITH HRV500) 30 air magic HRV500 anchoring bracket room air return inlet outside air inlet anchoring bracket anchoring bracket anchoring bracket water coil return outlet air relief valve anchoring bracket anchoring bracket room air supply outlet RJ45 connector moisture discharge outlet water coil supply inlet electric board cover cable feedthroughs exhaust air outlet electronic board cover anchoring bracket NTD500 SUPPLY SIDE air magic NTD500 NTD500 CONNECTION AND HRV500 EXHAUST SIDE

31 Chapter 20 DRAWINGS (NTD500 WITH HRV500) 31 air magic NTD500 + air magic HRV500 OUTSIDE AIR 995 ROMM AIR RETURN EXHAUST AIR TOP VIEW ROOM AIR SUPPLY

32 Chapter 20 DRAWINGS (NTD500 WITH HRV500) 32 ASSEMBLY: NTD500 DEHUMIDIFIER WITH HRV500 HRV MODULE Glue the four gaskets [3] onto the dehumidifier air magic NTD500 [1] around the inlet vent, bring the recovery unit air magic HRV500 [4] close to the dehumidifier while lining them up; use the bracket [2] with the 4 (dimensions 6x10 mm) to couple the two units; conclude the operation with the corner piece [5] and other 4 screws (dimensions 6x10 mm). The recovery unit is powered via the dehumidifier: connect the lines from the dehumidifier terminals with the recovery unit terminals having the same code. A second bracket [5] is supplied as replacement to bracket [2] for reverse coupling of the recovery unit: in this set-up the exhaust air is on the side opposite to the dehumidifier connection port

33 Chapter 21 ACCESSORIES 33 Chapter 21.1 air magic silencer 800 accessory If the treated incoming air inlet is in the vicinity of the dehumidifier air magic NTD500, or if the type of ductwork requires airflow sound attenuation, it is recommended that the silencer 800 accessory be installed. This makes it possible to attenuate sound pressure level of air supply by 5.5 db. The shape of the silencer allows sound attenuation across a wide range of frequencies, also reducing those particularly bothersome that are not dampened. The pressure loss of the silencer at the nominal flow of 470 CFM is inch of w.c. supply supply return return AXIOMETRIC VIEW

34 Chapter 21 ACCESSORIES 34 Chapter 21.1 air magic silencer 800 accessory ROOM AIR RETURN ROOM AIR RETURN TOP VIEW ROOM AIR SUPPLY ROOM AIR SUPPLY SUPPLY SIDE VIEW SIDE VIEW RETURN SIDE VIEW

35 Chapter 21 ACCESSORIES 35 Chapter 21.2 air magic silencer 800 accessory+ air magic NTD500 ROOM AIR RETURN 865 anchoring bracket room air return inlet anchoring bracket anchoring bracket 600 anchoring bracket 1119 electric board cover 500 room air supply outlet ROOM AIR SUPPLY AXIOMETRIC VIEW OVERHEAD VIEW

36 Chapter 21 ACCESSORIES 36 Chapter 21.2 SILENCER ASSEMBLY: DEHUMIDIFIER WITH SILENCER Remove from the dehumidifier air magic NTD500 [1] the return fitting [2] by unscrewing the screws [4]. Fix the silencer 800 accessory [3] to the dehumidifier using the same 8 screws (3.5x6.5 mm). Reposition the return fitting on the air supply side of the silencer by using the 8 screws [5] (3.5x6.5 mm) that are pre-screwed in the silencer

37 Chapter 21 ACCESSORIES 37 Chapter 21.3 INLET ADAPTER , , TOP VIEW 250 (10 ) 250 (10 ) ,5 65,5 300 AXIOMETRIC VIEW SIDE VIEW

38 Chapter 21 ACCESSORIES 38 Chapter 21.4 INLET ADAPTER ASSEMBLY ROOM AIR SUPPLY removable for air filter replacement screws room air return inlet adapter 300 ROOM AIR RETURN (250 mm - 10 ) AXIOMETRIC VIEW TOP VIEW

39 12 12 Chapter 22 INSTALLATION CLEARANCES 39 The dehumidifiers air magic NTD500, which can be coupled to the HRV module air magic HRV500, were designed for ceiling, hanging and freestanding installation. For proper machine operation and maintenance, both scheduled and extraordinary, the minimum clearance must be respected during installation, as shown in the figures below [Figures A and B]. Make sure that unit is installed with a slight tilt or is plumbed to facilitate the condensation tank drainage towards the discharge. air magic NTD500 air magic NTD500 with air magic HRV500 ROOM AIR SUPPLY 12 ROOM AIR SUPPLY 20 ELECTRIC BOARD ACCESS AIR FILTER ROOM AIR RETURN ELECTRIC BOARD ACCESS EXHAUST AIR ROOM AIR RETURN AIR FILTERS 12 OUTSIDE AIR Figure A - TOP VIEW Figure B - TOP VIEW

40 Chapter 22 INSTALLATION 40 CEILING INSTALLATION [Figure C] FREESTANDING INSTALLATION [Figure D] Ceiling installation depicts bracketing the machine in a hanging position using the brackets supplied [1]. These must be connected to appropriate anti-vibration elements [2], selected in function of the type of ceiling anchors [3], and regularly installed. It is necessary to mount on the ceiling [4] an inspection hatch or panel [5] to carry out scheduled maintenance on the unit (air filter cleaning, checking the refrigeration circuit, access to the electrical panel, etc...). Whenever the structure allows, it is best that the ceiling opening be large enough for complete unit dismounting. The need to line the internal part of the dropped ceiling with soundproof cladding should be evaluated if installing the unit in a noise-sensitive zone. Freestanding installation entails positioning the unit on a flat surface [6] on supports. These last must be connected to appropriate anti-vibration elements [7], selected by the installer and mounted professionally. Dehumidifier maintenance can be easily done from overhead. 1 ELECTRIC BOARD COVER Figure C - CEILING INSTALLATION ELECTRIC BOARD COVER 6 Figure D - FREESTANDING INSTALLATION

41 Chapter 22 INSTALLATION 41 MOISTURE DISCHARGE An appropriate siphon must be connected in the vicinity of the unit for each condensate discharge, both for the dehumidifier and the HRV module when the latter is part of the system. The siphon can be emptied when the unit is idle. At the start of each summer season, the siphon must be "reactivated" by pouring water into the condensation collection tank located beneath the treatment coil. This fills the siphon with water and avoids the situation where air intake through the siphon impedes regular condensation discharge. AIRTIGHT CONNECTION BETWEEN MOISTURE DISCHARGE OUTLET AND SIPHON Figure E - MOISTURE DISCHARGE: CEILING INSTALLATION Ensure that all panels are correctly installed and secured with their screws before starting the unit. Important Note: Running the unit when panels are not properly mounted can cause serious unit malfunctions (low efficiency, condensate discharge difficulties with leaks from the unit, etc.). AIRTIGHT CONNECTION BETWEEN MOISTURE DISCHARGE OUTLET AND SIPHON Figure E - MOISTURE DISCHARGE: FREESTANDING INSTALLATION

42 Chapter 22 INSTALLATION 42 FROST PROTECTION If the outside intake air is very cold and/or there is a chilled wind there is a risk that the pre- and post- treatment water coils may be damaged. In order to protect the unit from any possible damage when the machine is not in use it is best to adopt - as determined by the installer and/or designer - a frost protection system by means of: insertion of glycol into the refrigeration circuit, frost protection dampers or any other adequate measures. PRE AND POST TREATMENT COILS CAUTION: The coils may rupture if the water freezes. WATER SUPPLY AND RETUEN

43 43 Radiant Cooling And Heating Systems reserves the right to modify the machine specifications in this manual without advance notice. Radiant Cooling And Heating Systems declines any liabilities for any inexactness due to printing errors and / or entries contained therein. The instructions, drawings, tables and information generally included in this technical manual are confidential and may not be duplicated, neither in whole nor in part, or disclosed to third parties without written authorization of Radiant Cooling And Heating Systems who owns all exclusive intellectual rights thereof.

44 Messana Air-Ray Conditioning LLC 2224 Albert Ln, Capitola, CA, Phone/Fax: (855) RAY-MAGIC ( )