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