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
CG-SVX051A-GB
63
Integrated Pump Maintenance
Water Pump Maintenance
WARNING!
Before starting work on the pump, make sure
that the power supply has been switched off and that it
cannot be accidentally switched on.
CAUTION!
The lifting eyebolts of the motor are suitable
for the weight of the motor only. It is not allowed to carry
the complete pump on the lifting eyebolts of the motor.
It is important to keep the motor clean in order to ensure
adequate cooling of the motor. If the pump is installed
in dusty environments, it must be cleaned and checked
regularly. Take the enclosure class of the motor into
account when cleaning.
If the water loop must be emptied during period of frost,
the pump has to be drained to avoid damage. Remove
the filling and drain plugs. Do not refit the plugs until the
pump is taken into operation again.
Lubrication
The motor bearings of hot water pumps are greased
for life and require no lubrication as well as bearings of
chilled water pump motors 5.5kW and 7.5kW. Increasing
bearing noise and undue vibration indicate a worn
bearing. The bearing or the complete motor then needs
replacement.
Bearings of chilled water pump motors 11kW and over
must be greased every 4000 hours or at yearly service.
The required grease quantity is 10g per bearing. The
motor must run during lubrication. Use lithium-based
grease.
The pump shaft seal does not require any special
maintenance. Visual leakage check are however required.
Distinctly visible leakage will require an exchange of the
seal.
For further details about pump maintenance please
consult the pump supplier website.
Figure 24 - Motor bearings
