
10
NOTES:
■
Do not adjust the charge based on the suction pressure
unless there is a gross undercharge.
■
Check the Schrader ports for leaks and tighten valve
cores if necessary. Install caps finger tight.
Heat Pump—Heating Cycle
The proper method of charging a heat pump in the heat mode is
by weight with the additional charge adjustments for line size, line
length and other system components. Make final charge
adjustments in the cooling cycle.
NOTE: Subcooling = Saturated Liquid Temperature - Liquid Line Temperature
Saturated Suction Pressure Temperature
Suction Pressure
Saturated Suction Temperature ºF
Suction Pressure
Saturated Suction Temperature ºF
PSIG
R-410A
PSIG
R-410A
50
1
78
20
52
3
80
21
54
4
85
24
56
6
90
26
58
7
95
29
60
8
100
31
62
10
110
36
64
11
120
41
66
13
130
45
68
14
140
49
70
15
150
53
72
16
160
56
74
17
170
60
76
19
Saturated Liquid Pressure Temperature
Liquid Pressure
Saturated Liquid Temperature ºF
Liquid Pressure
Saturated Liquid Temperature ºF
PSIG
R-410A
PSIG
R-410A
200
70
375
112
210
73
405
118
220
76
415
119
225
78
425
121
235
80
435
123
245
83
445
125
255
85
475
130
265
88
500
134
275
90
525
138
285
92
550
142
295
95
575
145
305
97
600
149
325
101
625
152
355
108