Check Compressor Oil Level; Adjust Oil Charge; 38Ap 60 Hz Additional Lubricant - Carrier 38APS025 Manual

Check Compressor Oil Level —
refrigerant charge, allow each circuit to run fully loaded for
20 minutes. Stop the compressors and check the oil level. Oil
level should be 1 / to 3 / up on the sight glass.
8 8
IMPORTANT: Oil level should only be checked when the
compressors are off.
Add oil only if necessary to bring the oil into view in the
sight glass. If oil is added, run the circuit for an additional
10 minutes, then stop and check oil level. If the level remains
low, check the piping system for proper design for oil return;
also, check the system for leaks. If checking the oil level with
unit running in part load, let unit run one hour, then run at full
load for 10 minutes. If oil does not return to acceptable sight
glass levels, check for correct suction piping and line sizing.
UNIT SIZE CIRCUIT
UP to 25 ft
A
38APD025
B
38APS025 Single
A
38APD027
B
38APS027 Single
A
38APD030
B
38APS030 Single
A
38APD040
B
38APS040 Single
A
38APD050
B
38APS050 Single
A
38APD060
B
38APS065 Single
A
38APD070
B
A
38APD080
B
A
38APD090
B
A
38APD100
B
A
38APD115
B
A
38APD130
B
After adjusting the
Table 12 — 38AP 60 Hz Additional Lubricant (English)
ADDITIONAL LUBRICANT (FLUID OUNCES) ESTIMATE FOR PIPING LENGTH AND REFRIGERANT
25 to 50 ft 50 to 75 ft
0 0 0
0 0 0
10 12 17
0 0 6
0 0 6
11 16 18
0 0 7
0 0 7
12 17 19
9 11 12
0 9 10
23 30 33
9 11 16
11 16 18
29 35 39
11 16 18
12 17 19
33 44 50
12 17 19
20 26 30
12 17 19
28 34 38
23 30 33
28 34 38
29 35 39
28 34 38
28 34 38
33 44 50
28 34 38
43 54 60
Adjust Oil Charge —
factory charged with oil, additional oil is likely required to
maintain the oil level in the compressor. Tables 12-15 indicate
the likely amount required based on the liquid line size and
system piping length. Additional lubricant estimate is based on
using recommended pipe sizes. Values listed are estimates
only. See Adding Oil section on page 147 for Carrier-approved
oils. After operating the compressor for a period of time, the
oil level should be between
The compressor oil level should be checked with the compres-
sor off to avoid the sump turbulence when the compressor is
running. Oil must be added if the oil level does not meet the
requirements.
75 to 100 ft 100 to 125 ft 125 to 150 ft
7 8
7 8
19 22
7 8
7 8
20 23
7 8
7 8
21 24
18 20
12 19
37 40
19 21
20 23
51 57
21 23
21 24
56 61
21 24
33 36
21 24
50 56
37 40
50 56
51 57
50 56
50 56
56 61
50 56
65 71
57
Although the compressors are
/ and / of the oil sight glass.
1 3
8 8
150 to 175 ft 175 to 200 ft
8 9
8 9
24 26
9 9
9 9
25 27
9 16
9 16
26 28
23 25
21 23
57 63
23 25
25 27
63 68
25 28
26 28
67 73 102
26 28
40 59
26 28
62 67
57 63
62 67
63 68
62 67
62 67
67 73 102
62 67
94 103 112
10
10
29
10
10
29
17
17
44
27
26
69
28
29
74
30
44
44
65
44
73
69
73
74
73
73
73