RLC-SVX023A
37
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
Unit Start-up
Daily Unit Start Up
The timeline for the sequence of operation begins with a
power-up of the main power to the chiller. The sequence
assumes 1 circuit RTSF water cooled chiller with no
diagnostics or malfunctioning components. External
events such as the operator placing the chiller in AUTO
or STOP, chilled water flow through the evaporator, and
application of load to the chilled water loop causing loop
water-temperature increases, are depicted and the chiller
responses to those events are shown, with appropriate
delays noted. The effects of diagnostics, and other
external interlocks other than evaporator water-flow
proving, are not considered.
Note: unless the UC800 TD7 and building automation
system are controlling the chilled-water pump, the
manual unit start sequence is as follows. Operator
actions are noted.
General
If the present checkout, as discussed above, has been
completed, the unit is ready to start.
1. Press the STOP key on the TD7 display.
2. As necessary, adjust the set point values on the TD7
menus using Tracer TU.
3. Close the fused-disconnect switch for the
chilledwater pump. Energize the pump(s) to start
water circulation
4. Check the service valve on oil line. This valve
must be open (back seated) before starting the
compressors.
5. Verify that chilled-water pump runs for at least one
minute after the chiller is commanded to stop (for
normal chilled-water systems).
6. Press the AUTO key. If the chiller control calls for
cooling, and all safety interlocks are closed, the unit
will start. The compressor will load and unload in
response to the leaving chilled – water temperature;
After the system has been operating for approximately
30 minutes and has become stabilized, complete the
remaining start up procedures, as follows:
1. Check the evaporator refrigerant pressure and the
condenser refrigerant pressure under Refrigerant
Report on the TD7.
2. Check the EXV sight glasses after enough time has
elapsed to stabilize the chiller. The refrigerant flow
through the sight glasses should be clear. Bubbles in
the refrigerant indicate either low refrigerant charge
or excessive pressure drop in the liquid line, or an
expansion valve that is stuck open. A restriction in
the line can sometimes be identified by a noticeable
temperature differential between the two sides of
the restriction. Frost will often form on the line at
this point. Proper refrigerant charges are shown in
the General Information Section;
3. Measure the system discharge superheat.
4. Clean the air filter located on the door of the control
panel of AFD when required.
Seasonal Unit Startup Procedure
1. Close all valves and reinstall the drain plugs in the
evaporator and condenser.
2. Service the auxiliary equipment according to the
startup and maintenance instructions provided by
the respective equipment manufacturers.
3. Close the vents in the evaporator and condenser
water circuits.
4. Open all the valves in the evaporator and condenser
water circuits.
5. Open all refrigerant valves.
6. If the evaporator and condenser were previously
drained, vent and fill the evaporator and condenser
water circuit. When all air is removed from the
system (including each pass), install the vent plugs
in the evaporator and condenser water connections.
7. Verifiy periodically water characteristics as it is a key
element for heat exchanger reliability.
8. Check the adjustment and operation of each safety
and operating control.
9. Close all disconnect switches.
10. Refer to the sequence for daily unit start up for the
remainder of the seasonal start up.
CAUTION!
Ensure that the compressor and oil separator
heaters have been operating for a minimum of 24 hours
before starting. Failure to do so may result in equipment
damage.
System Restart after Extended
Shutdown
1. Verify that the oil line, service valve is open
(back seated).
2. Check the oil separator oil level (see Maintenance
procedures section).
3. Fill the evaporator and condenser water circuit. Vent
the system while it is being filled. Open the vent
on the top of the evaporator and condenser while
filling, and close it when filling is completed.
4. Close the fused-disconnect switches that provide
power to the water pump.
5. Start the evaporator and condenser water pump
and, while water is circulating, inspect all piping for
leakage. Make any necessary repairs before starting
the unit.
6. While the water is circulating, adjust the water flow
and check the water pressure drops through the
evaporator and condenser. Refer to “water-system
flow rates” and “water-system pressure drop”.
7. Adjust the flow switch on the evaporator and
condenser piping for proper operation.
8. Stop the water pumps. The unit is now ready for
startup as described “Startup procedures.
CAUTION!
To prevent damage to the compressor, ensure
that all refrigerant valves are open before starting the
unit. Do not use untreated or improperly treated water.
Equipment damage may occur.
Ensure that the compressor and oil separator heaters
have been operating for a minimum of 24 hours before
starting. Failure to do so may result in equipment
damage.
