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Removing Compressor Oil
The oil in the compressor oil separator is under a
constant positive pressure at ambient temperature. To
remove oil, open the service valve located on the bottom
Sound power levels
of the oil separator and drain the oil into a suitable
container using the procedure outlined below:
Discharge
CAUTION: POE Oil!
Due to the hygroscopic properties of the POE oil, all oil
Measurement conditions:
must be stored in metal containers. The oil will absorb
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
water if stored in a plastic container.
long) fixed to its discharge opening.
Oil should not be removed until the refrigerant is
isolated or removed.
Fan
Unit
speed
Connect a line to the oil sump drain valve.
1
FWD 08
2
Open the valve and allow the desired amount of oil to
3
flow into the container and close the charging valve.
1
FWD 10
2
Measure the exact amount of oil removed from the unit.
3
1
Oil Charging Procedure
FWD 12
2
3
1
It is critical to fill the oil lines feeding the compressor
FWD 14
2
when charging a system with oil. The diagnostic "Loss of
3
oil at the compressor stopped " will be generated if the
1
FWD 20
oil lines are not full on start-up.
2
3
To properly charge the system with oil, follow the steps
below:
Intake
1. Locate the 1/4 " schrader valve on the end of the
Measurement conditions:
compressor.
Measurements taken at the horizontal air intake.
2. Loosely connect oil pump to schrader valve called out
in step 1.
Fan
3. Operate oil charging pump until oil appears at
Unit
speed
the charging valve connection; then tighten the
1
FWD 08
2
connection.
3
Note: To keep air from entering the oil, the charging
1
FWD 10
valve connection must be air-tight.
2
3
4. Open the service valve and pump in the required
1
amount of oil.
FWD 12
2
3
5. Monitor the "Oil Loss Level Sensor Status in TD7 in
1
Compressor status view. This display shows whether
FWD 14
2
3
the optical sensor is seeing oil (wet) or if it is not (dry).
1
NOTE: The remainder of the oil charge can be charged
FWD 20
2
3
into the 1/4 " service valve located at the bottom of the
separator if a larger connection is preferred.
UNT-PRC002-GB
RLC-SVX023A
Power level in dB(A), per Hz frequency band
125
250
500
55
50
42
57
54
47
58
57
50
57
51
45
58
54
48
60
58
50
57
51
45
58
54
48
60
58
50
56
62
50
61
66
55
63
69
58
57
63
51
61
66
55
63
69
58
Power level in dB(A), per Hz frequency band
125
250
500
56
55
55
63
62
60
66
65
63
62
58
55
66
63
60
70
67
63
62
58
55
66
63
60
70
67
63
66
65
65
73
72
69
78
76
73
68
72
64
76
76
68
78
79
71
Maintenance Procedures
Replacing the Main Oil Filter
(Hot Filter)
The filter element should be changed if the oil flow is
sufficiently obstructed. Two things can happen: first, the
chiller may shut down on a "Low Oil Flow " diagnostic,
or secondly, the compressor may shut down on a "Loss
of Oil at Compressor (Running) diagnostic. If either of
these diagnostics occurs, it is possible the oil filter needs
replacement. The oil filter is not usually the cause of a
Loss of oil at Compressor diagnostic.
Specifically, the filter must be changed if the pressure
drop in the lubrication circuit exceeds the maximum
1000
2000
level as given in Figure 10 below. The charts show the
37
37
relationship between the pressure drop measured in the
40
30
lubrication circuit as compared with operating pressure
42
32
42
34
differential of the chiller (as measured by pressures in
45
38
the condenser and evaporator).
48
40
42
34
Normal pressure drops of the lubrication circuit are
45
38
shown by the lower curve. The upper curve represents
48
40
the maximum allowable pressure drop and indicates
48
39
when the oil filter must be changed. Pressure drops that
53
47
56
50
lie between the lower and upper curves are considered
49
40
acceptable.
53
47
56
50
For a chiller equipped with an oil cooler, add 35 kPa
to the values shown in Figure 10. For example, if the
system pressure differential was 550 kPa, then the clean
filter pressure drop would be approximately 100 kPa
(up from 70 kPa For a chiller with an oil cooler and
operating with a dirty oil filter, the maximum allowable
pressure drop would be 190 kPa (up from 160 kPa).
Under normal operating conditions the element should
1000
2000
be replaced after the first year of operation and then as
53
46
60
53
needed thereafter.
62
56
58
51
62
56
65
59
58
51
62
56
65
59
65
57
71
64
75
69
64
56
71
65
74
69
Overall power
4000
8000
dB(A)
31
30
46
38
40
50
40
43
53
33
28
48
39
35
51
42
39
54
33
28
48
39
35
51
42
39
54
38
36
56
46
45
60
50
49
63
39
37
57
46
45
60
50
49
63
Overall power
4000
8000
dB(A)
45
42
57
53
53
64
55
57
67
48
44
61
55
52
66
59
57
69
48
44
61
55
52
66
59
57
69
50
46
68
59
57
74
64
63
78
52
50
69
61
61
75
66
66
78
11
43
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