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Temporary Shutdown and Restart
Temporary Shutdown is used for control operation,
maintenance or to repair the unit typically less than one
week.
Sound power levels
To shut the unit down for a short time, use the following
procedure:
1.
Press the STOP key on the TD7. The compressors will
Discharge
stop when the compressor contactors de-energize.
2.
Stop the water circulation by turning off water
Measurement conditions:
pumps at least one minute after the stop of the
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
compressors.
long) fixed to its discharge opening.
To restart the unit after a temporary shutdown, enable
the chilled-water pump and press the AUTO key.
Fan
The unit will start normally, provided the following
Unit
speed
conditions exist:
1
FWD 08
2
•
The Tracer Symbio™ 800 receives a call for cooling /
3
heating and the differential-to-start is above the set
1
point.
FWD 10
2
•
All system operating interlocks and safety circuits
3
1
are satisfied.
FWD 12
2
CAUTION! Under freezing conditions, water pumps of
3
chilled/hot water exchangers must remain in operation
1
FWD 14
2
during the full shutdown period of the unit if their water
3
loop does not contain glycol to prevent any risk of
1
freeze-up.
FWD 20
2
3
Extended Shutdown Procedure
Intake
The following procedure is to be followed if the system
is to be taken out of service for an extended period of
Measurement conditions:
time (i.e. seasonal shutdown):
Measurements taken at the horizontal air intake.
1.
Test the unit for refrigerant leaks and repair as
necessary.
Fan
2.
Open the electrical disconnect switches for water
Unit
speed
pumps. Lock the switches in the "OPEN" position.
1
3.
Close all water supply valves. Drain the water from
FWD 08
2
the water exchangers.
3
1
4.
Open the unit main electrical disconnect and unit-
FWD 10
2
mounted disconnect (if installed) and lock in the
3
"OPEN" position.
1
5.
At least every three months (quarterly), check
FWD 12
2
the refrigerant pressure in the unit to verify the
3
refrigerant charge integrity.
1
FWD 14
2
CAUTION! Lock water pump disconnects open to prevent
3
pump damage. Lock the disconnect switch in the "OPEN"
1
position to prevent accidental startup and damage to the
FWD 20
2
3
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.
CG-SVX051A-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
Unit Start Up Procedures
1000
2000
4000
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
1000
2000
4000
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
Overall power
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
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
57
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