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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 close
the other (depending on the side of the desired reading), this
Discharge
eliminate errors resulting from differently calibrated gauges
installed at unmatched elevations.
Measurement conditions:
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. Water
Unit
speed
vessels with close-coupled shutoff valves have high potential
1
for hydrostatic pressure buildup on a water temperature
FWD 08
2
increase. Refer to applicable local codes for relief valve
3
installation.
1
FWD 10
2
3
1
FWD 12
2
3
1
FWD 14
2
3
1
FWD 20
2
3
Intake
Measurement conditions:
Measurements taken at the horizontal air intake.
Fan
Unit
speed
1
FWD 08
2
3
1
FWD 10
2
3
1
FWD 12
2
3
1
FWD 14
2
3
1
FWD 20
2
3
CTV-SVX009D-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
Evaporator Flow Switch
Specific connection and schematic wiring diagram are
shipped within the unit. Some piping and control schemes,
particularly those using a single water pump for both chilled
and hot water, must be analyzed to determine how and/or if
a flow sensing device will provide the desired operation.
Flow Switch Installation – Typical Requirements
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 arrow on
the switch must point in the direction of the flow.
2.
To prevent switch fluttering, remove all air from the
1000
2000
water system. Tracer UC800 provides a 6 second time
37
37
delay after a "loss-of-flow" diagnostic before shutting
40
30
42
32
the unit down. Contact a Trane service representative if
42
34
nuisance machine shutdowns persist.
45
38
3.
Adjust the switch to open when water flow falls below
48
40
nominal values. Evaporator data is given on the General
42
34
Information Section. Flow Switch contacts are closed on
45
38
48
40
proof of water flow.
48
39
4.
Install a pipe strainer in the entering evaporator-water
53
47
line to protect components.
56
50
49
40
CAUTION! Control voltage from the chiller to the flow
53
47
56
50
proving device is 110V AC.
1000
2000
53
46
60
53
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
Evaporator Piping
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
21
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