Westinghouse WHM24DMA21S User manual

AIR CONDITIONER
Duct type
REFRIGERANT R410A
INVERTER
SERVICE MANUAL
INDOOR
WHM24DMA21S
WHM36DMA21S
WHM48DMA21S
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.
2021.12.14

SAFETY SUMMARY
IMPORTANT NOTICE
●We pursue a policy of continuing improvement in design and performance of products. The right is
therefore reserved to vary specifications without notice.
●We cannot anticipate every possible circumstance that might involve a potential hazard.
●This air conditioner is designed for standard air conditioning only. Do not use this air conditioner for
other purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.
Do not let the air-out face animals or plants, it might have an adverse effect on them.
●The installer and system specialist shall secure safety against leakage according to local regulations
or standards.
●Signal words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness.
Definitions for identifying hazard levels are provided below with their respective signal words.
●Installation should be performed by the dealer or other professional personnel. Improper installation
may cause water leakage, electrical shock, or fire.
●Do not perform installation work, refrigerant piping work, drain piping and electrical wiring connection
without referring to our installation manual. If the instructions are not followed, it may result in water
leakage, electric shock or fire.
●Use refrigerant R410A in the refrigerant cycle.
●Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If
poured, it will cause a serious electrical shock.
●Do not open the service cover or access panel for the indoor or outdoor units without turning OFF the
main power supply.
●Do not touch or adjust safety devices inside the indoor or outdoor units. If these devices are touched
or readjusted, it may cause a serious accident.
●Refrigerant leakage can cause difficulty in breathing due to insufficient air. Turn OFF the main switch,
extinguish any naked flames and contact your service contractor, if refrigerant leakage occurs.
●Do perform air-tight test. Do not charge oxygen, acetylene or other flammable and poisonous gases
into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases are
extremely dangerous and can cause an explosion. It is recommended that nitrogen be used for this
test.
●The installer and system specialist shall secure safety against refrigerant leakage according to local
regulations or standards.
●Use an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an electric shock or
a fire if it is not used.
Immediate hazards which WILL result in severe personal injury or death.
Hazards or unsafe practices which COULD result in severe personal injury or
death.
Hazards or unsafe practices which COULD result in minor personal injury or
product or property damage.
Useful information for operation and/or maintenance.
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Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.

●Do not step or put any material on the product.
●Do not put any foreign material on the unit or inside the unit.
●It is recommended that the room be ventilated every 3 to 4 hours.
●The air conditioner may not work properly under the following circumstances.
The power transformer provides the same power with the air conditioner. The electrical equipment
is too close to the power supply of the air conditioner. With the sharp change of power
consumption and switching action, the power supply of the air conditioner will generate a large
induction surge voltage.
CHECKING PRODUCT RECEIVED
●Upon receiving this product, inspect it for any shipping damage. Claims for damage, either apparent
or concealed, should be filed immediately with the shipping company.
●Check the model number, electrical characteristics (power supply, voltage and frequency) and
accessories to determine if they are correct.
The standard utilization of the unit shall be explained in these instructions.
Therefore, the utilization of the unit other than those indicated in these instructions is not
recommended.
Please contact your local agent, as the occasion arises.
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●Do not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within
approximately one (1) meter from the system.
●If circuit breaker or fuse is often activated, stop the system and contact your service contractor.
●Check that the ground wire is securely connected. If the unit is not correctly grounded, it will lead
to electric shock. Do not connect the ground wiring to gas piping, water piping, lightning conductor
or ground wiring for telephone.
●Before performing any brazing work, check to ensure that there is no flammable material around
when using refrigerant. Be sure to wear leather gloves to prevent cold injuries.
●Protect the wires, electrical parts, etc. from rats or other small animals.
If not protected, rats may gnaw at unprotected parts, which may lead to fire.
●Fix the cables securely. External forces on the terminals could lead to a fire.
●Install the air conditioner on a solid base that can support the unit weight. An inadequate base or
incomplete installation may cause injury in the event the unit falls off the base. Incomplete
connections or clamping may cause terminal overheating or fire.
●Make sure that the outdoor unit is not covered with snow or ice, before operation.

Specifications
Type
Duct
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
Capacity
Cooling
Rated kW 7.03 10.56 14.07 16.41
Btu/h 24,000 36,000 48,000 56,000
Min.—Max. kW 2.23—7.33 2.81—10.70 5.36—15.24 5.36—17.41
Btu/h 6,700—26,000 11,800—36,800 18,300—52,000 18,300—59,400
Heating
Rated kW 7.03 10.56 14.07 16.41
Btu/h 24,000 36,000 48,000 56,000
Min.—Max. kW 2.23—7.33 2.61—11.20 5.16—15.24 5.16—16.85
Btu/h 6,700—26,000 8,900—38,200 17,600—52,000 17,600—57,500
Input power
Cooling Rated
kW
2.200 3.770 4.690 6.560
Min.—Max. 0.560—2.900 1.122—3.981 1.423—5.708 1.490—7.569
Heating Rated 2.000 3.200 4.260 5.290
Min.—Max. 0.725—3.960 0.725—3.960 1.228—5.080 1.323—6.019
Current Cooling Rated A 9.6 16.5 21.0 26.8
Heating 8.7 14.1 19.0 21.0
EER Cooling W/W 3.2 2.8 2.99 2.5
Btu/hW 10.90 9.55 10.20 8.50
COP Heating W/W 3.5 3.3 3.1
Btu/hW 11.95 11.26 10.58
SEER Cooling Btu/hW 18.0 17.5
HSPF Heating Btu/hW 10.0 11.0 10.0
Power factor Cooling %99
Heating 99
Moisture removal pints/h (L/h) 4.6 (2.2) 9.5 (4.5) 11.6 (5.5) 15.8 (7.5)
Maximum operating current*1Cooling A25.0 35.0 50.0
Heating 25.0 35.0 50.0
Fan
Airflow rate Cooling CFM (m3/h) 800 (1,360) 1,120 (1,905) 1,588 (2,700) 1,706 (2,900)
Heating 800 (1,360) 1,120 (1,905) 1,588 (2,700) 1,706 (2,900)
Type × Q'ty Sirocco × 1
Motor output W 249 373 559
Static pressure range inWG (Pa) 0 to 0.8 (0 to 200)
Sound pressure level*2Cooling HIGH dB (A) 55 57 64 65
Heating 55 57 64 65
Heat exchanger type
Dimensions (H × W × D) in (mm) 17-1/2 × 16-1/2 × 1-1/16 (444 × 420 × 27.2)
17-1/2 × 16-1/2 × 1-1/16 (444 × 420 × 27.2)
20 × 21-1/2 × 1-5/16 (509 × 546 × 34)
20 × 21-1/2 × 1-5/16 (509 × 546 × 34)
Fin pitch FPI 18 17
Rows × Stages 4 × 20 5 × 26
Pipe type Copper
Fin type Aluminum
Dimensions
(H × W × D)
Net
in (mm)
46-1/8 × 19-5/8 × 21-5/8
(1,170 × 500 × 550)
53-7/8 × 22 × 24
(1,370 × 560 × 610)
Gross 49-5/8 × 22-1/2 × 25-3/8
(1,260 × 570 × 645)
55-1/2 × 25-1/4 × 28
(1,410 × 640 × 710)
Weight Net lb (kg) 135.5 (61.5) 140.0 (63.5) 187.2 (85)
Gross 158.6 (72) 163.1 (74) 214.0 (97)
Connection pipe Size Liquid in (mm) Ø3/8 (Ø9.52) Gas Ø5/8 (Ø15.88) Ø3/4 (Ø19.05) Ø7/8 (Ø22.22)
Method Flare
Drain hose Material ABS
Tip diameter in (mm) Ø15/16 (Ø24.5) (I.D.), Ø1-1/16 (Ø26.5) (O.D.)
Operation range Cooling °F (°C) 61 to 86 (16 to 30) %RH 80 or less
Heating °F (°C) 61 to 86 (16 to 30)
Remote controller type Wired [locally purchased]
Option Heater kit
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB)/67 °FWB (19.44 °CWB), and outdoor temperature of 95 °FDB (35 °CDB)/75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB)/59 °FWB (15.56 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB)/43 °FWB (6.11 °CWB).
– Pipe length: 25 ft (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Maximum current is maximum value when operated within the operation range.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
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Type Inverter heat pump
Model name WHM24SZA21S WHM36SZA21S WHM48SZA21S WHM60SZA21S
Power supply 208/230 V ~ 60 Hz
Available voltage range 198—253 V
Fan
Airflow rate CFM (m3/h) 1,825 (3,150) 2,350 (3,995) 3,525 (6,000)
Type × Q'ty Propeller fan × 1 Propeller fan × 2
Motor output W 60 121
Sound pressure level *1dB (A) 54 57 59 60
Heat exchanger type
Dimensions
(H × W × D) in (mm)
35-5/8 × 25-1/4 × 7/8
(900 × 630 × 21.7)
34 × 25-1/4 × 7/8
(866 × 630 × 21.7)
38-3/16 × 31-3/8 ×
1-11/16
(970 × 798 × 43.3)
38-3/16 × 53 × 1-7/16
(970 × 1,344 × 36.4)
38-3/16 × 53 ×
1-11/16
(970 × 1,344 × 43.3)
Fin pitch FPI 18 19 17 18
Rows × Stages 2 × 30 2 × 38 2 × 64
Pipe type Copper
Fin type Type (Material) Aluminum
Surface treatment Blue fin
Compressor Type Rotary
Refrigerant
Type R410A
Charge lb oz 4 lb 7 oz 6 lb 3 oz 8 lb 15 oz
g 2,000 2,800 4,050
Refrigerant oil Type VG74
Enclosure Material Steel sheet
Color White
Dimensions
(H × W × D)
Net
in (mm)
26-3/8 × 33-7/8 ×
12-1/4
(670 × 860 × 310)
33 × 37-3/8 × 13-3/8
(840 × 950 × 340)
54-5/8 × 37-3/8 × 13-3/8
(1,386 × 950 × 340)
Gross 28-3/4 × 39 × 1-3/4
(730 × 990 × 450)
36-1/4 × 43-3/4 ×
18-1/8
(920 × 1,110 × 460)
60-1/4 × 43-3/4 × 18-1/8
(1,530 × 1,110 × 460)
Weight Net lb (kg) 112.4 (51) 147.7 (67) 227.1 (103) 251.3 (114)
Gross 121.3 (55) 158.7 (72) 253.5 (115) 277.5 (126)
Connection pipe
Size Liquid in (mm) Ø3/8 (Ø9.52)
Gas Ø5/8 (Ø15.88) Ø3/4 (Ø19.05) Ø7/8 (Ø22.22)
Method Flare
Pre-charge length
ft (m)
24.6 (7.5)
Max. length 164 (50) 246 (75)
Max. height difference Indoor unit higher than outdoor unit: 98 (30)
Outdoor unit higher than indoor unit: 98 (30)
Operation range Cooling °F (°C) 5 to 122 (-15 to 50)
Heating -13 to 75 (-25 to 24)
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB)/67 °FWB (19.44 °CWB), and outdoor temperature of 95 °FDB (35 °CDB)/75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB)/59 °FWB (15 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB)/43 °FWB (6.11 °CWB).
– Pipe length: 24 ft 6 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Sound pressure level
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
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Dimensions
Models: WHM24DMA21S and WHM36DMA21S
Unit: in (mm)
18 (458)
19-5/8 (500)
21-5/8 (550)
Gas pipe
Ø1-3/4 (43)
Ø1-3/8 (34)
Liquid pipe
46 (1,170)
44-7/8 (1,139)
20 (508)
10-1/2 (268)
10-1/4 (261)
16 (408)
14-5/8 (370)
2-3/8 (60)
2-1/4 (58)
1-3/8 (35)
3-1/4 (81)
Drain pipe
Electric box
2 (51)
Air outlet
Air inlet
Ø1-3/4 (43)
Ø1-3/8 (34)
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Models: WHM48DMA21S and WHM60DMA21S
Unit: in (mm)
20-3/8 (518)
22 (560)
21-5/8 (550)
Gas pipe
Ø1-3/4 (43)
Ø1-3/8 (34)
Liquid pipe
53-7/8 (1,370)
52-3/4 (1,338.5)
24-3/4 (629.8)
12-7/8 (328)
10-1/4 (261)
20-7/8 (529.6)
19-3/8 (491.5)
2-3/8 (60)
2-1/4 (58)
1-3/8 (35)
3-1/4 (81.5)
Drain pipe
Electric box
2 (51)
Air outlet
Air inlet
Ø1-3/4 (43)
Ø1-3/8 (34)
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Installation space requirement
Provide sufficient installation space for product safety.
• Clearance in the vertical position
more than 0 in
25 in or more
More than 0 in
Front of unit
More than 0 in
• Clearance in the horizontal position
40 in or more
Air inlet Air outlet
40 in or more
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Model: WHM24SZA21S
Unit: in (mm)
Gas pipe
Electric box
12-7/8 (327)
26-3/8 (670)
12-1/4 (312)
21-3/8 (542) 6-5/8 (168) 3 (76)
33-7/8 (860)
Air inlet
12-1/8 (309)
2 (50)
Air outlet
4- 7/16 (11) × 11/16 (17) Hole
Drain pipe
1-7/16 (36)
12-3/16 (310)
14-1/2 (368)
13-7/16 (341)
4-7/8
(123)
4-15/16
(125)
4-5/16 (109) 6-7/16 (164)
Liquid pipe
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Model: WHM36SZA21S
Unit: in (mm)
Liquid pipe
Gas pipe
Electric box
22-7/8 (580)
37-3/8 (950) 3-1/2
(88)
40-7/8 (1,038)
13-9/16 (344)
Drain pipe Air inlet
Air outlet
2-3/4(70)
4- Ø5/8 (15) Hole
1-5/8 (41)
13-3/8 (340)
14-15/16 (380)
16-1/4 (414)
90°
7-1/4 (185)
33-1/8 (840)
2-5/8
(66)
6-1/8
(155)
4-1/8
(105)
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