7
U
SE
REFRIGERANT
CERTIFIED
TO
AHRI
STANDARDS
. U
SED
REFRIGERANT
MAY
CAUSE
COMPRESSOR
DAMAGE
,
AND
IS
NOT
COVERED
UNDER
THE
WARRANTY
. M
OST
PORTABLE
MACHINES
CANNOT
CLEAN
USED
REFRIGERANT
TO
MEET
AHRI
STANDARDS
.
CAUTION
V
IOLATION
OF
EPA
REGULATIONS
MAY
RESULT
IN
FINES
OR
OTHER
PENALTIES
.
NOTICE
O
PERATING
THE
COMPRESSOR
WITH
THE
SUCTION
VALVE
CLOSED
MAY
CAUSE
SERIOUS
COMPRESSOR
DAMAGE
.
CAUTION
F
INAL
C
HARGE
A
DJUSTMENT
The outdoor temperature must be 60°F or higher. Set the room
thermostat to COOL, fan switch to AUTO, and set the temperature
control well below room temperature.
After system has stabilized per startup instructions, check sub-
cooling and superheat as detailed in the following section.
E
XPANSION
V
ALVE
S
YSTEM
T
O
PREVENT
PERSONAL
INJURY
,
CAREFULLY
CONNECT
AND
DISCONNECT
MANIFOLD
GAUGE
HOSES
. E
SCAPING
LIQUID
REFRIGERANT
CAN
CAUSE
BURNS
. D
O
NOT
VENT
REFRIGERANT
INTO
THE
ATMOSPHERE
. R
ECOVER
ALL
REFRIGERANT
DURING
SYSTEM
REPAIR
AND
BEFORE
FINAL
UNIT
DISPOSAL
.
CAUTION
NOTE: Units matched with indoor coils equipped with non-adjust-
able TXV should be charged by subcooling only.
Run the unit on low stage cooling for 10 minutes until refrigerant
pressures stabilize. Use the following guidelines and methods to
check unit operation and ensure that the refrigerant charge is within
limits. Charge the unit on low stage.
1. Purge gauge lines. Connect service gauge manifold to base-
valve service ports. Run system at least 10 minutes to allow
pressure to stabilize.
2. Temporarily install a thermometer on the liquid line at the
liquid line service valve and 4-6" from the compressor on
the suction line. Ensure the thermometer makes adequate
contact and is insulated for best possible readings. Use
liquid line temperature to determine subcooling and vapor
temperature to determine superheat.
LIQUID PRESSURE
PSIG
R-22
R-410A
200
101
70
210
105
73
220
108
76
225
110
78
235
113
80
245
116
83
255
119
85
265
121
88
275
124
90
285
127
92
295
130
95
305
133
97
325
137
101
355
144
108
375
148
112
405
155
118
415
157
119
425
n/a
121
435
n/a
123
445
n/a
125
475
n/a
130
500
n/a
134
525
n/a
138
550
n/a
142
575
n/a
145
600
n/a
149
625
n/a
152
SATURATED LIQUID PRESSURE
TEMPERATURE CHART
SATURATED LIQUID
TEMPERATURE ºF
SUCTION PRESSURE
PSIG
R-22
R-410A
50
26
1
52
28
3
54
29
4
56
31
6
58
32
7
60
34
8
62
35
10
64
37
11
66
38
13
68
40
14
70
41
15
72
42
16
74
44
17
76
45
19
78
46
20
80
48
21
85
50
24
90
53
26
95
56
29
100
59
31
110
64
36
120
69
41
130
73
45
140
78
49
150
83
53
160
86
56
170
90
60
SATURATED SUCTION PRESSURE
TEMPERATURE CHART
SATURATED SUCTION
TEMPERATURE ºF
