Westinghouse WHP07WMA21S Service Manual page 25

• Refrigerant piping
Refrigerant pipe should be as short as possible.
Maximum length between indoor
unit and outdoor unit (A/B/C/D/E)
Total length of piping between all
units
Maximum height difference
between indoor unit and outdoor
unit (F)
Maximum height difference
between indoor units (G)
Additional refrigerant charge
When the total pipe length (L) exceeds standard length, additional refrigerant charge is required.
Model
WHP18M2A21S
WHP24M3A21S
WHP36M4A21S
WHP42M5A21S
Indoor unit
Pipe length A
Unit 18 model
≤ 82 (25)
A + B
≤ 164 (50)
ft (m)
Required amount of additional refrigerant
(L - 49 ft [15 m]) × 0.807 oz/ft (15 g/m)
(L - 73 ft [22.5 m]) × 0.807 oz/ft (15 g/m)
(L - 98 ft [30 m]) × 0.807 oz/ft (15 g/m)
(L - 123 ft [37.5 m]) × 0.807 oz/ft (15 g/m)
- 24 -
Pipe length E
Outdoor unit
E
D
C
B
A
24 model 36 model
≤ 65 (20)
A + B + C A + B + C + D
≤ 196 (60) ≤ 246 (75)
≤ 49 (15)
≤ 24 (7.5)
42 model
A + B + C + D
+ E
≤ 262 (80)