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
57
Temporary Shutdown and Restart
Temporary Shutdown is used for control operation,
maintenance or to repair the unit typically less than one
week.
To shut the unit down for a short time, use the following
procedure:
1. Press the STOP key on the TD7. The compressors will
stop when the compressor contactors de-energize.
2. Stop the water circulation by turning off water
pumps at least one minute after the stop of the
compressors.
To restart the unit after a temporary shutdown, enable
the chilled-water pump and press the AUTO key.
The unit will start normally, provided the following
conditions exist:
•
The Tracer Symbio™ 800 receives a call for cooling /
heating and the differential-to-start is above the set
point.
•
All system operating interlocks and safety circuits
are satisfied.
CAUTION!
Under freezing conditions, water pumps of
chilled/hot water exchangers must remain in operation
during the full shutdown period of the unit if their water
loop does not contain glycol to prevent any risk of
freeze-up.
Extended Shutdown Procedure
The following procedure is to be followed if the system
is to be taken out of service for an extended period of
time (i.e. seasonal shutdown):
1. Test the unit for refrigerant leaks and repair as
necessary.
2. Open the electrical disconnect switches for water
pumps. Lock the switches in the “OPEN” position.
3. Close all water supply valves. Drain the water from
the water exchangers.
4. Open the unit main electrical disconnect and unit-
mounted disconnect (if installed) and lock in the
“OPEN” position.
5. At least every three months (quarterly), check
the refrigerant pressure in the unit to verify the
refrigerant charge integrity.
CAUTION!
Lock water pump disconnects open to prevent
pump damage. Lock the disconnect switch in the “OPEN”
position to prevent accidental startup and damage to the
system when it has been set up for extended shutdown.
During an extended shutdown period, especially over
the winter season, the chilled/hot water exchangers must
be drained of water, if the chilled water loop does not
contain glycol, to prevent any risk of water exchanger
freeze-up.
Unit Start Up Procedures
