Westinghouse WHU09CTA21S, Service Manual, Page: 6 / 90

Type Inverter heat pump
Model name WHU09SZA21S WHU12SZA21S WHU18SZA21S WHU24SZA21S
Power supply 208/230 V ~ 60 Hz
Available voltage range 198—253 V 176—253 V
Fan
Airflow rate
CFM (m
3
/h)
1,355 (2,300) 1,853 (3,150) 2,235 (3,800)
Type × Q'ty Propeller fan × 1
Motor output W 30 60 121
Sound pressure level *
1
dB (A) 52 55
Heat exchanger type
Dimensions
(H × W × D)
in (mm)
21-1/2 × 33-1/16 ×
1-7/16
(546 × 840 × 36.4)
21-1/2 × 33-1/16 ×
1-11/16
(546 × 840 × 43.3)
24-13/16 × 35-7/16 ×
1-11/16
(630 × 900 × 43.3)
31-7/16 × 38-3/16 ×
1-11/16
(798 × 970 × 43.
3
)
Fin pitch FPI 17 18 20
Rows × Stages 2 × 26 2 × 30 2 × 38
Pipe type Copper
Fin type
Type (Material) Aluminum
Surface treatment Blue fin
Compressor Type Rotary
Refrigerant
Type R410A
Charge
lb oz 2 lb 2 oz 2 lb 14 oz 3 lb 8 oz 5 lb 12 oz
g 950 1,300 1,600 2,600
Refrigerant oil Type VG74 VG74 (POE)
Enclosure
Material Steel sheet
Color White
Dimensions
(H × W × D)
Net
in (mm)
22-7/8 × 31-7/8 × 11
(580 × 810 × 280)
26-3/8 × 33-7/8 ×
12-1/4
(670 × 860 × 310)
33-1/8 × 37-3/8 ×
13-3/8
(840× 950 × 340)
Gross
25-1/4 × 37 × 16-1/2
(640 × 940 × 420)
28-3/4× 39 × 17-3/4
(730 × 990 × 450)
36-1/4 × 43-3/4 ×
18-1/8
(920 × 1,110 × 460)
Weight
Net
lb (kg)
75 (34) 79 (36) 106 (48) 155 (71)
Gross 84 (38) 88 (40) 115 (52) 166 (76)
Connection pipe
Size
Liquid
in (mm)
Ø1/4 (Ø6.35) Ø1/4 (Ø6.35) Ø3/8 (Ø9.52)
Gas Ø3/8 (Ø9.52) Ø1/2 (Ø12.7) Ø5/8 (Ø15.88)
Method Flare
Pre-charge length
ft (m)
24
.6
(7.
5
)
Max. length 82 (25) 98 (30) 164 (50)
Max. height difference
Indoor unit higher than
outdoor unit: 33 (10)
Outdoor unit higher
than indoor unit: 33
(10)
Indoor unit higher than outdoor unit: 49 (15)
Outdoor unit higher than indoor unit: 49 (15)
Indoor unit higher than
outdoor unit: 98 (30)
Outdoor unit higher
than indoor unit: 98
(30)
Operation range
Cooling
°F (°C)
5 to 118 (-15 to 48)
Heating -4 to 75 (-20 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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5
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