Maintenance, Lubrication, Cleaning coils – Carrier 38HDL018-060 User Manual
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MAINTENANCE
Before performing recommended maintenance, be sure
unit main power is off. Failure to do so may result in
electrical shock or injury from rotating fan blades.
Lubrication
FAN-MOTOR BEARINGS — Oiling holes are provided at
each end of the condenser-fan motor. Remove fan motor and
lubricate motor with 32 drops (16 drops per hole) of SAE-10
(Society of Automotive Engineers) non-detergent oil at in-
tervals described below:
• Annually, when environment is very dirty, ambient tem-
perature is higher than 105 F, and average unit operating
time exceeds 15 hours a day, or
• Every three years, when environment is reasonably clean,
ambient temperature is less than 105 F, and unit operating
time averages 8 to 15 hours per day, or
• Every 5 years when environment is clean, ambient tem-
perature is less than 105 F, and unit operating time aver-
ages less than 8 hours per day.
COMPRESSOR — Compressor contains factory oil charges;
replace oil when lost. See Table 1 for oil recharge and refer
to Carrier Standard Service Techniques Manual, Chapter 1,
pages 1 to 21 for oil recharging procedure. See Table 6 for
recommended compressor oils.
Cleaning Coils
— Coil should be washed out with wa-
ter or blown out with compressed air. Note that the blow-
thru design causes dirt and debris to build up on the inside
of the coils.
Clean coil annually or as required by location and outdoor
air conditions. Inspect coil monthly and clean as required.
Fins are NOT continuous through coil sections. Dirt and de-
bris may pass through the first section, become trapped be-
tween the rows of fins, and restrict condenser airflow. Use a
flashlight to determine if dirt or debris has collected between
coil sections. Clean coil as follows:
1. Turn off unit power.
2. Use a garden hose or other suitable equipment to flush
coil from the outside to remove dirt. Be sure to flush all
dirt and debris from drain holes in the base of unit. Fan
motors are waterproof.
Table 5 — Required Liquid Line Temperature (F) (At Service Valve)
REQUIRED
SUBCOOLING (F)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
134 141 148 156 163 171 179 187 196 205 214 223 233 243 253 264 274 285 297 309 321 331 346 359
0
76
79
82
85
88
91
94
97 100 103 106 109 112 115 118 121 124 127 130 133 136 139 142 145
5
71
74
77
80
83
86
89
92
95
98 101 104 107 110 113 116 119 122 125 128 131 134 137 140
10
66
69
72
75
78
81
84
87
90
93
96
99 102 105 108 111 117 120 123 126 129 129 132 135
15
61
64
67
70
73
76
79
82
85
88
91
94
97 100 103 106 109 112 115 118 121 124 127 130
20
56
59
62
65
68
71
74
77
80
83
86
89
92
95
98 101 104 107 110 113 116 119 122 125
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
Table 6 — Recommended Compressor Oils
RECOMMENDED
OIL
UNIT 38HDL
018
024
030
036
048
060
3GS
Calumet RO-15
Sontex 200LT
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