Carrier R-22 Application Manual And Service Manual page 48

CUBE UNIT
AIR CONDITIONERS
MODEL
SERIES 0
014 —
018 15
024 14
030 12
036 18
042 18
048 —
060 —
PRESSURE (PSIG)
AT SERVICE FITTING
134
141
148
156
163
171
179
187
196
205
214
223
233
243
253
264
274
285
297
309
321
331
346
359
5. Restore power to unit.
CLEANING OUTDOOR FAN MOTOR AND BLADE
1. Remove fan motor and blade. Refer to Remove Fan-Motor
Assembly section of this manual. Be careful not to bend or
dent fan blade.
2. Clean motor and blade with soft brush or cloth. Be careful not
to disturb balance weights on fan blade.
3. Check fan-blade setscrew for tightness.
4. Reinstall fan motor and blade to top cover and check for
alignment.
5. Reinstall top cover and position blade as per Fig. 24.
6. Reconnect electrical power and check for proper operation.
ELECTRICAL CONTROLS AND WIRING
1. Disconnect power to both the outdoor and indoor units.
2. Check all electrical connections for tightness. Tighten all
screws on electrical connections. If any connections appear to
be burned or smoky, disassemble the connection, clean all
parts and stripped wires, and reassemble. Use a new connector
CUBE UNIT
HEAT PUMPS
38CK
1 0
— —
16 11
11 14
12 9
16 11
17 17
17 12
21 10
Table 25—Required Liquid-Line Temperature
0
76 71
79 74
82 77
85 80
88 83
91 86
94 89
97 92
100 95
103 98
106 101
109 104
112 107
115 110
118 113
121 116
124 119
127 122
130 125
133 128
136 131
139 134
142 137
145 140
38YC 38GN
1 1
— 10
14 12
8 —
10 —
7 —
— —
— —
— —
REQUIRED SUBCOOLING TEMPERATURE (°F)
5 10
66
69
72
75
78
81
84
87
90
93
96
99
102
105
108
111
114
117
120
123
126
129
132
135
if old one is burned or corroded and crimp tightly.
3. Reconnect electrical power to the indoor and outdoor units and
observe unit through 1 complete operating cycle.
4. If there are any discrepancies in the operating cycle, trouble-
shoot to find the cause, and correct.
REFRIGERANT CIRCUIT
1. Check the refrigerant charge using the superheat or subcooling
method, whichever is applicable. If low on charge, check unit
for leaks using an electronic leak detector.
2. If any leaks are found, recover or isolate charge (pumpdown)
if applicable and make necessary repairs.
3. Evacuate, recharge, and operate unit through entire cycle.
FINAL CHECKOUT
After the unit has been operating, the following items should be
checked:
1. Check that unit operational noise is not excessive due to
vibration of components, tubing, panels, etc. If present, isolate
problem and correct.
48
HORIZONTAL
AIR CONDITIONERS
38GNA 38HDA
2 0 0
— — —
— 17 20
12 19 17
— — 20
— — 22
— — —
— — 18
— — 23
15 20
61 56
64 59
67 62
70 65
73 68
76 71
79 74
82 77
85 80
88 83
91 86
94 89
97 92
100 95
103 98
106 101
109 104
112 107
115 110
118 113
121 116
124 119
127 122
130 125
38QRA
0
—
10
19
18
26
—
17
17
25
51
54
57
60
63
66
69
72
75
78
81
84
87
90
93
96
99
102
105
108
111
114
117
120