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WARNING! It is imperative that L1, L2, and L3 in the
starter be connected in the A-BC phase sequence to
prevent equipment damage due to reverse rotation.
WARNING!To prevent injury or death due to
Sound power levels
electrocution, take extreme care when performing service
procedures with electrical power energized.
Discharge
CAUTION! Do not interchange any load leads that are
Measurement conditions:
from the unit contactors or the motor terminals. Doing so
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
may damage the equipment.
long) fixed to its discharge opening.
Water System Flow Rates
Fan
Establish a balanced chilled-water flow through the
Unit
speed
evaporator. The flow rates should be between the
1
FWD 08
2
minimum and maximum values given on the pressure
3
drop curves.
1
FWD 10
2
Water System Pressure Drop
3
1
Measure the water-pressure drop through the evaporator
FWD 12
2
on the field installed pressure taps on the system water
3
1
piping. Use the same gauge for each measurement. Do
FWD 14
2
not include valves, strainers, or fittings in the pressure
3
drop readings.
1
FWD 20
2
Integrated Pump Package (Optional)
3
Before starting up the pump, the pipe system must be
Intake
thoroughly cleaned, flushed and filled with clean water.
Do not start the pump until it has been vented. To ensure
Measurement conditions:
correct venting, open the vent screw located on the pump
Measurements taken at the horizontal air intake.
housing on the suction side (see next figure).
Fan
The warranty does not cover any damage caused by
Unit
speed
flushing the pipe system by means of the pump.
1
FWD 08
2
Shaft seal run-in : the seal faces are lubricated by the
3
1
pumped liquid, meaning that there may be a certain
FWD 10
2
amount of leakage from the shaft seal.
3
When the pump is started up for the first time, or when
1
a new shaft seal is installed, a certain run-in period is
FWD 12
2
required before the leakage is reduced to an acceptable
3
1
level. Under normal conditions, the leaking will
FWD 14
2
evaporate. As a result no leakage will be detected.
3
1
CAUTION! When using freeze inhibitor, never fill the
FWD 20
2
3
system with pure glycol; this will damage the shaft seal.
Always fill the system with diluted solution. Maximum
concentration of glycol is 45% for unit with pump
package.
If the chiller is installed in a humid environment or a
location with high air humidity, the bottom drain hole on
the pump motor should be opened. The enclosure class of
the motor is then changed from IP55 to IP44. The function
of the drain holes is to drain off water which has entered
the stator housing with air humidity.
RLC-SVX19G-GB
UNT-PRC002-GB
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
Figure 36 – Pump Package
B
B
F
C
C
1000
2000
A = Pump vent screw
37
37
B = Air vent valve
40
30
42
32
C = Drain valve
42
34
45
38
Expansion Tank
48
40
42
34
(Pump Package Option)
45
38
48
40
The factory installed expansion tank initial pressure
48
39
53
47
should be adjusted about 0.5 bars higher than the static
56
50
pressure applied to the chiller water inlet. The static
49
40
pressure is given by the maximum water circuit height
53
47
compare to chiller location: example: the chiller is at
56
50
ground level and the circuit loop goes from basement
(at -4m compare to chiller) to third floor at 10 metres
above ground, the static pressure to use is 10 metres
of water (1 Bar) and the expansion tank initial pressure
should be 1.5 bars.
The expansion tank volume has been selected for
1000
2000
typical loop volume. The following table summarizes the
53
46
maximum volume of the chilled water loop that can be
60
53
supported by the expansion tank at different conditions.
62
56
58
51
If this maximum volume versus the required volume of
62
56
the installation is not enough, it will be necessary to add
65
59
an additional expansion tank located on the low pressure
58
51
62
56
side of the installation.
65
59
65
57
Table 32 – Maximum water loop volume in function of
71
64
static pressure of expansion tank
75
69
64
56
RTAF 090 - 250
71
65
74
69
Static pressure
Pure water (l)
Ethylene glycol 20% (l)
Ethylene glycol 30% (l)
Ethylene glycol 45% (l)
RTAF 280 - 550
Static pressure
Pure water (l)
Ethylene glycol 20% (l)
Ethylene glycol 30% (l)
Ethylene glycol 45% (l)
Pre-Start Checkout
F
A
A
Overall power
E
E
D
4000
8000
dB(A)
D= Drain and fill valve
31
30
46
E = Pump drain plug
38
40
50
40
43
53
F = Motor drain hole plug
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
1 Bar
2 Bar
3 Bar
6342
3996
3409
2148
2273
1432
1515
955
1 Bar
2 Bar
3 Bar
9292
5854
5689
3584
4912
3095
4073
2566
1370
736
491
327
2007
1229
1061
880
11
161
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