Table of Contents
Advertisement
Drainage
Locate the unit near a large capacity drain for water
vessel draindown during shutdown or repair. Water
piping is provided with drain connections. Refer to
"Water Piping. " All local and national codes apply.
Sound power levels
Piping
A vent is provided on the top of the evaporator at the
Discharge
return end. Be sure to provide additional vents at high
points in the piping to bleed air from the chilled water
Measurement conditions:
system. Install necessary pressure gauges to monitor the
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
entering and leaving chilled water pressures.
long) fixed to its discharge opening.
Figure 3 - Unit typical water circuit
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
Intake
Measurement conditions:
Measurements taken at the horizontal air intake.
1 = Pressure gauges: show entering and leaving water
pressure
Fan
2 = Balancing valve: adjusts water flow.
Unit
speed
1
3 = Air purge allows to remove the air from the water
FWD 08
2
circuit during fill up.
3
1
4 = Stop valves: isolate chillers and water circuiting
FWD 10
2
pump during maintenance operations.
3
1
5 = Thermometers: indicate chilled water entering and
FWD 12
2
leaving temperatures.
3
6 = Expansion compensators: avoid mechanical stress
1
FWD 14
2
between chiller and piping installation.
3
7 = Stop valve located on the outlet connection: used
1
FWD 20
2
to measure the water pressure inlet or outlet of
3
evaporator.
8 = Strainer: avoid to get heat exchangers dirty. All
installation must be equipped with efficient strainer
in order that only clean water enters into exchanger.
If there is no strainer, reserve will be formulated by
the Trane technician at the start-up of the unit. The
trainer used must be able to stop all particles with a
diameter greater than 1 mm.
9 = Draining: used as the draining the plate heat
exchanger.
10 = Do not start the unit with low water volume or not
enough pressurized circuit.
Note: A pressure switch device to detect lack of water
is not included in the pump package. Installation of this
type of device is highly recommended to avoid sealing
damage due to operation of pump without enough
water.
CG-SVX027D-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
Installation – Mechanical
Provide shutoff valves in lines to the gauges to isolate
them from the system when they are not in use. Use
rubber vibration eliminators to prevent vibration
transmission through the water lines. If desired, install
thermometers in the lines to monitor entering and
leaving water temperatures. Install a balancing valve
in the leaving water line to control water flow balance.
Install shutoff valves on both the entering and leaving
water lines so that the evaporator can be isolated for
service. Make sure the water circuit includes all devices
and controls used to provide proper water system
operation and unit operating safety.
1000
2000
37
37
40
30
42
32
42
34
45
38
48
40
42
34
45
38
48
40
48
39
53
47
56
50
49
40
53
47
56
50
Minimal installation water content
The water volume is an important parameter because
1000
2000
it allows as table chilled water temperature and avoids
53
46
short cycle operation of the compressors.
60
53
62
56
Parameters which influence the water temperature
58
51
stability
62
56
65
59
• Water loop volume
58
51
• Load fluctuation
62
56
65
59
• Number of capacity steps
65
57
71
64
• Compressors rotation
75
69
• Dead band (adjusted on chiller controller)
64
56
71
65
• Minimum time between 2 starts of a compressor
74
69
Minimum water volume for a comfort application
For comfort application we can allow water temperature
fluctuation at part load. The parameter to take into
account is the minimum operating time of the
compressor. In order to avoid lubrication problem
on a scroll compressor it must run at least 2 minutes
120 seconds) before it stops.
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
19
Hide quick links:
Advertisement
Table of Contents
