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Pressure Gauges
Install field-supplied pressure components as shown in
Figure 6. Locate pressure gauges or taps in a straight run
of pipe; avoid placing them near elbow (at least at 10 pipe
Sound power levels
diameter from discontinuity).
To read manifold pressure gauges, open one valve and
Discharge
close the other (depending on the side of the desired
reading), this eliminate errors resulting from differently
Measurement conditions:
calibrated gauges installed at unmatched elevations.
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
Pressure Relief Valves
long) fixed to its discharge opening.
Install a water pressure relief valve in the evaporator inlet
Fan
piping between evaporator and the inlet shutoff valve.
Unit
speed
1
Water vessels with close-coupled shutoff valves have
FWD 08
2
high potential for hydrostatic pressure buildup on a water
3
temperature increase. Refer to applicable local codes for
1
relief valve installation.
FWD 10
2
3
1
Evaporator Flow Switch
FWD 12
2
3
Specific connection and schematic wiring diagram
1
are shipped within the unit. Some piping and control
FWD 14
2
3
schemes, particularly those using a single water pump
1
for both chilled and hot water, must be analyzed to
FWD 20
2
determine how and/or if a flow sensing device will
3
provide the desired operation.
Intake
Flow Switch Installation – Typical Requirements
Measurement conditions:
Measurements taken at the horizontal air intake.
1.
Mount the switch upright, with a minimum of 5 pipes
diameters of straight horizontal run on each side. Do
not install close to elbows, orifices, or valves. The
Fan
Unit
speed
arrow on the switch must point in the direction of the
1
flow.
FWD 08
2
2.
To prevent switch fluttering, remove all air from the
3
1
water system. Tracer UC800 provides a 6 second time
FWD 10
2
delay after a "loss-of-flow" diagnostic before shutting
3
the unit down. Contact a Trane service representative
1
if nuisance machine shutdowns persist.
FWD 12
2
3
3.
Adjust the switch to open when water flow falls
1
below nominal values. Evaporator data is given
FWD 14
2
on the General Information Section. Flow Switch
3
1
contacts are closed on proof of water flow.
FWD 20
2
4.
Install a pipe strainer in the entering evaporator-
3
water line to protect components.
CAUTION! Control voltage from the chiller to the flow
proving device is 110V AC.
RLC-SVX19E-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
1000
2000
4000
37
37
31
40
30
38
42
32
40
42
34
33
45
38
39
48
40
42
42
34
33
45
38
39
48
40
42
48
39
38
53
47
46
56
50
50
49
40
39
53
47
46
56
50
50
1000
2000
4000
53
46
45
60
53
53
62
56
55
58
51
48
62
56
55
65
59
59
58
51
48
62
56
55
65
59
59
65
57
50
71
64
59
75
69
64
64
56
52
71
65
61
74
69
66
Evaporator Piping
Overall power
8000
dB(A)
30
46
40
50
43
53
28
48
35
51
39
54
28
48
35
51
39
54
36
56
45
60
49
63
37
57
45
60
49
63
Overall power
8000
dB(A)
42
57
53
64
57
67
44
61
52
66
57
69
44
61
52
66
57
69
46
68
57
74
63
78
50
69
61
75
66
78
11
55
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