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AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
OUTDOOR
, WESTINGHOUSE, and INNOVATION YOU CAN BE SURE OF are trademarks of Westing house
Electric Corporation. Used under license by FUJITSU GENERAL AMERICA, INC. All Rights Reserved.
WHM24DMA21S
WHM36DMA21S
WHM24SZA21S
WHM48DMA21S
WHM60DMA21S
WHM36SZA21S
R410A
REFRIGERANT
INVERTER
WHM48SZA21S
WHM60SZA21S
DR_AR061EW_01
2021.12.06
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Table of Contents
Related Manuals for Westinghouse WHM24DMA21S
Summary of Contents for Westinghouse WHM24DMA21S
- Page 1 DESIGN & TECHNICAL MANUAL INDOOR WHM24DMA21S WHM48DMA21S WHM36DMA21S WHM60DMA21S OUTDOOR WHM24SZA21S WHM36SZA21S WHM48SZA21S WHM60SZA21S , WESTINGHOUSE, and INNOVATION YOU CAN BE SURE OF are trademarks of Westing house Electric Corporation. Used under license by FUJITSU GENERAL AMERICA, INC. All Rights Reserved. DR_AR061EW_01 2021.12.06...
- Page 2 Notices: • Product specifications and design are subject to change without notice for future improvement. • For further details, please check with our authorized dealer. WARNING This product can expose you to chemicals including Plumbum, which is known to the State of California to cause cancer and birth defects or other reproductive harm.
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Page 3: Table Of Contents
2. Dimensions....................3 2-1. Models: WHM24DMA21S and WHM36DMA21S .............3 2-2. Models: WHM48DMA21S and WHM60DMA21S .............4 2-3. Installation space requirement ..................5 3. Wiring diagrams ....................6 3-1. Models: WHM24DMA21S, WHM36DMA21S, WHM48DMA21S, and WHM60DMA21S ............................6 4. Capacity table....................7 4-1. Cooling capacity.......................7 4-2. Heating capacity ......................11 5. - Page 4 CONTENTS (continued) Part 2. OUTDOOR UNIT..............19 1. Specifications....................20 2. Dimensions....................21 2-1. Model: WHM24SZA21S....................21 2-2. Model: WHM36SZA21S....................22 2-3. Models: WHM48SZA21S and WHM60SZA21S .............23 3. Installation space ..................24 3-1. Models: WHM24SZA21S, WHM36SZA21S, WHM48SZA21S, and WHM60SZA21S..24 4. Refrigerant circuit ..................25 4-1. Models: WHM24SZA21S and WHM36SZA21S .............25 4-2.
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Page 5: Part 1. Indoor Unit
Part 1. INDOOR UNIT DUCT TYPE: WHM24DMA21S WHM36DMA21S WHM48DMA21S WHM60DMA21S... -
Page 6: Specifications
1. Specifications Duct Type Inverter heat pump Model name WHM24DMA21S WHM36DMA21S WHM48DMA21S WHM60DMA21S Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 198—253 V 7.03 10.56 14.07 16.41 Rated Btu/h 24,000 36,000 48,000 56,000 Cooling 2.23—7.33... -
Page 7: Dimensions
2. Dimensions 2-1. Models: WHM24DMA21S and WHM36DMA21S Unit: in (mm) Air outlet 2 (51) Electric box Gas pipe Liquid pipe Drain pipe 3-1/4 (81) 1-3/8 (35) 21-5/8 (550) Air inlet 19-5/8 (500) 18 (458) - 3 - 2-1. Models: WHM24DMA21S and WHM36DMA21S... -
Page 8: Models: Whm48Dma21S And Whm60Dma21S
2-2. Models: WHM48DMA21S and WHM60DMA21S Unit: in (mm) Air outlet 2 (51) Electric box Gas pipe Liquid pipe Drain pipe 3-1/4 (81.5) 1-3/8 (35) 21-5/8 (550) Air inlet 22 (560) 20-3/8 (518) - 4 - 2-2. Models: WHM48DMA21S and WHM60DMA21S 2. -
Page 9: Installation Space Requirement
2-3. Installation space requirement Provide sufficient installation space for product safety. • Clearance in the vertical position More than 0 in More than 0 in Front of unit • Clearance in the horizontal position Air inlet Air outlet 40 in or more 40 in or more - 5 - 2-3. -
Page 10: Wiring Diagrams
Fan speed Brown Fan speed Blue Fan speed Yellow Fan speed Gray Fan speed Common White Fan input neutral White Fan input live Black YE/GN - 6 - 3-1. Models: WHM24DMA21S, WHM36DMA21S, WHM48DMA21S, and WHM60DMA21S 3. Wiring diagrams... -
Page 11: Capacity Table
Airflow Rate (AFR): For cooling capacity: Total Capacity (TC), Sensible Heat Capacity (SHC), and Input Power (IP) For heating capacity: Total Capacity (TC) and Input Power (IP) 4-1. Cooling capacity ¢ Model: WHM24DMA21S (°F) Airflow Outdoor DB (CFM) (°F) - Page 12 ¢ Model: WHM36DMA21S 1,120 (°F) Airflow Outdoor DB (CFM) (°F) 30.7 31.0 31.6 32.0 31.6 32.0 32.3 32.7 33.8 34.1 34.4 34.6 — 41.2 41.5 41.8 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 — 0.39 0.53 0.67 2.06...
- Page 13 ¢ Model: WHM48DMA21S 1,588 (°F) Airflow Outdoor DB (CFM) (°F) 40.9 41.3 42.2 42.7 42.2 42.7 43.1 43.5 45.1 45.5 45.9 46.2 — 55.0 55.4 55.8 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 — 0.39 0.53 0.67 2.60...
- Page 14 ¢ Model: WHM60DMA21S 1,706 (°F) Airflow Outdoor DB (CFM) (°F) 47.7 48.2 49.2 49.8 49.2 49.8 50.3 50.8 52.6 53.1 53.6 53.9 — 64.1 64.6 65.1 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 — 0.39 0.53 0.67 3.68...
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Page 15: Heating Capacity
4-2. Heating capacity NOTE: Values mentioned in the table are calculated based on the maximum capacity. ¢ Model: WHM24DMA21S Airflow (CFM) (°F) (°F) 28.3 28.3 28.2 28.2 28.1 27.1 24.9 23.0 21.4 21.4 20.1 19.2 18.0 16.7 15.6 14.6 1.64 1.75... - Page 16 ¢ Model: WHM48DMA21S 1,588 Airflow (CFM) (°F) (°F) 56.6 56.6 56.4 56.4 56.3 54.2 49.8 46.1 42.8 42.9 40.3 38.5 36.0 33.4 31.2 29.1 3.49 3.73 4.05 4.39 4.74 4.77 4.60 4.44 4.31 4.74 4.61 4.48 4.40 4.24 4.12 4.04 43.7 43.4 43.7...
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Page 17: Fan Performance
(not less than 350 CFM/Ton). • Airflow based upon air handler unit operates at 230 V with no electric heater kit and no filter. Airflow at 208 V is approximately the same as 230 V. ¢ Model: WHM24DMA21S External static pressure in.H2O [KPa] Fan speed 0.18... - Page 18 ¢ Model: WHM48DMA21S External static pressure in.H2O [KPa] Fan speed 0.18 (0.02) (0.045) (0.07) (0.1) (0.12) (0.15) (0.17) (0.20) Tap (2) 1,756 1,701 1,626 1,579 1,520 1,468 1,425 — — Default setting — — 1,799 1,746 1,678 1,634 1,571 1,522 1,449 1,402 —...
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Page 19: Airflow
Conversion factor: • 1 m /h = 0.2778 l/s = 0.5886 CFM • 3.6 m /h = 1 l/s • 1.699 m /h = 1 CFM ¢ Model: WHM24DMA21S Cooling Airflow 1,360 Heating Airflow 1,360 ¢ Model: WHM36DMA21S ... - Page 20 ¢ Model: WHM48DMA21S Cooling Airflow 2,700 1,588 Heating Airflow 2,700 1,588 ¢ Model: WHM60DMA21S Cooling Airflow 2,900 1,706 Heating Airflow 2,900 1,706 - 16 - 5-2. Airflow 5. Fan performance...
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Page 21: Electrical Characteristics
6. Electrical characteristics If you use the optional heater kit, make sure if it is suitable for the 3-way installation of the AHU. Heater kit Electric Fan speed tap MCA* MAX. CKT. BKR* handler model heat AC 230 V AC 208 V AC 230 V AC 208 V model... -
Page 22: Accessories
7. Accessories Part name Q’ty Part name Q’ty Use and installation instructions Warranty card - 18 - 7. Accessories... -
Page 23: Part 2. Outdoor Unit
Part 2. OUTDOOR UNIT SINGLE TYPE: WHM24SZA21S WHM36SZA21S WHM48SZA21S WHM60SZA21S... -
Page 24: Specifications
1. Specifications Type Inverter heat pump Model name WHM24SZA21S WHM36SZA21S WHM48SZA21S WHM60SZA21S Power supply 208/230 V ~ 60 Hz Available voltage range 198—253 V Airflow rate 1,825 (3,150) 2,350 (3,995) 3,525 (6,000) CFM (m Type × Q'ty Propeller fan × 1 Propeller fan ×... -
Page 25: Dimensions
2. Dimensions 2-1. Model: WHM24SZA21S Unit: in (mm) Electric box 12-1/4 (312) Liquid pipe 21-3/8 (542) 6-5/8 (168) 3 (76) 4-7/8 Gas pipe (123) 33-7/8 (860) 4-15/16 (125) 12-1/8 (309) Drain pipe Air inlet 2 (50) 4- 7/16 (11) × 11/16 (17) Hole Air outlet - 21 - 2-1. -
Page 26: Model: Whm36Sza21S
2-2. Model: WHM36SZA21S Unit: in (mm) Electric box Gas pipe Liquid pipe 2-5/8 6-1/8 7-1/4 (185) 22-7/8 (580) (66) (155) 37-3/8 (950) 3-1/2 (88) 40-7/8 (1,038) 13-9/16 (344) Air inlet Drain pipe 2-3/4(70) 4- Ø5/8 (15) Hole Air outlet - 22 - 2-2. -
Page 27: Models: Whm48Sza21S And Whm60Sza21S
2-3. Models: WHM48SZA21S and WHM60SZA21S Unit: in (mm) Electric box 37-3/8 (950) 3-1/2 Gas pipe Liquid pipe (88) 2-5/8 (66) 6-1/8 (155) 40-7/8 (1,038) 7-1/4 (185) 22-7/8 (580) Drain pipe Air inlet 13-9/16 (344) 4- Ø5/8 (15) Hole Air outlet - 23 - 2-3. -
Page 28: Installation Space
3. Installation space 3-1. Models: WHM24SZA21S, WHM36SZA21S, WHM48SZA21S, and WHM60SZA21S ¢ Space requirement Provide sufficient installation space for product safety. CAUTION Keep the space shown in the installation examples. If the installation is not performed accordingly, it could cause a short circuit and result in a lack of operating performance. -
Page 29: Refrigerant Circuit
4. Refrigerant circuit 4-1. Models: WHM24SZA21S and WHM36SZA21S Cooling cycle Heating cycle List of components Compressor Discharge temperature sensor 4-way valve Outdoor heat exchanger Coil temperature sensor Ambient temperature sensor Electronic expansion valve Stop valve (Liquid) Stop valve (Gas) One-way valve Strainer Pressure sensor - 25 -... -
Page 30: Models: Whm48Sza21S And Whm60Sza21S
4-2. Models: WHM48SZA21S and WHM60SZA21S Cooling cycle Heating cycle List of components Compressor Discharge temperature sensor High pressure switch Suction temperature sensor 4-Way valve Pressure sensor Outdoor heat exchanger Ambient temperature sensor Coil temperature sensor Defrost temperature sensor Electronic expansion valve Strainer One-way valve Stop valve (Gas) -
Page 31: Wiring Diagrams
5. Wiring diagrams 5-1. Models: WHM24SZA21S and WHM36SZA21S USE COPPER SUPPLY WIRES DC FAN MOTOR POWER TERMINAL PANEL FG (CN901.1) AC-LIN (CN501) Vsp (CN901.2) AC-NIN (CN502) Vcc (CN901.3) GND (CN901.4) YEL/GRN EARTH (CN503) +310V (CN901.6) +310V EARTH CONNECTION TERMINAL PANEL YEL/GRN X12.4 Control Board... -
Page 32: Models: Whm48Sza21S And Whm60Sza21S
5-2. Models: WHM48SZA21S and WHM60SZA21S Power terminal panel IPM BOARD CN12 NIN Nout2 CN11 LIN Lout FILTER CN17 CN18 CN16 CN15 CN14 BOARD EARTH DC FAN1 DC FAN2 FAN2 FAN1 X1 PTC Lout1 Nout1 YLW/GRN RED WHI BLU YLW/GRN USE COPPER SUPPLY WIRES INDUCTOR COMPRESSOR YLW/GRN DC FAN1 MOTOR DC FAN2 MOTOR... -
Page 33: Electrical Characteristics
6. Electrical characteristics Model name WHM24SZA21S WHM36SZA21S Voltage 208/230 ~ Power supply Frequency MCA* MAX. CKT. BKR* Power cable 3 × 12 3 × 10 Wiring Size 5 × 16 spec.* Connection Limited wiring cable* ft (m) 167 (51) 249 (76) length Model name WHM48SZA21S... -
Page 34: Accessories
7. Accessories Part name Q’ty Part name Q’ty Installation and operation manual Drain hose Rubber cushion - 30 - 7. Accessories...