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The Tracer UC800 Service Tool (TU) is used to install and
assign any of the above listed events or status to each of
the 4 relays. The default assignments for the 4 available
relays are listed below.
Sound power levels
LLID Name
Discharge
Operating Status
Programmable Relays
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
Unit
speed
1
FWD 08
2
If the evaporator/condenser pump request relays are
3
not used to manage the evaporator/condenser water
1
pumps then the evaporator/condenser freeze avoidance
FWD 10
2
3
request relays must be connected to the water pump
1
management system to switch the water pumps ON
FWD 12
2
when the Tracer UC800 identifies a risk of freeze up.
3
1
Latching input
FWD 14
2
3
The Tracer UC800 provides auxiliary control for a
1
customer specified/installed latching trip out. When
FWD 20
2
this customer-furnished remote contact is provided,
3
the chiller will run normally when the contact is closed.
When the contact opens, the unit will trip off on a
Intake
manually resettable diagnostic. This condition requires
manual reset at the chiller switch on the front of the
Measurement conditions:
control panel.
Measurements taken at the horizontal air intake.
External Auto/Stop
Fan
If the unit requires the external Auto/Stop function, the
Unit
speed
installer must provide leads from the remote contacts to
1
FWD 08
2
the proper terminals of the LLID on the control panel. The
3
chiller will run normally when the contacts are closed.
1
When the contact opens, the compressor(s), if operating,
FWD 10
2
will go to the RUN : UNLOAD operating mode and cycle
3
1
off. Unit operation will be inhibited. Re-closure of the
FWD 12
2
contacts will permit the unit to automatically return to
3
normal operation.
1
FWD 14
2
NOTE: A "panic " stop (similar to "emergency " stop) can
3
be manually commanded by pressing the STOP button
1
FWD 20
twice in a row, the chiller will immediately shut down,
2
3
but without creating a latching diagnostic.
UNT-PRC002-GB
RLC-SVX023A
LLID Software
Relay Designation
Relay 0
Relay 1
Relay 2
Relay 3
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 - Electrical
Output Name
Status Relay 1, J2-1,2,3
Status Relay 2, J2-4,5,6
Status Relay 3, J2-7,8,9
Status Relay 4, J2-10,11,12
1000
2000
37
37
40
30
Soft Loading
42
32
42
34
Soft loading will prevent the chiller from going to full
45
38
capacity during the pull-down period. The Tracer UC800
48
40
42
34
control system has two soft loading algorithms running
45
38
all of the time. They are capacity control soft loading and
48
40
current limit soft loading. These algorithms introduce the
48
39
use of a Filtered Chilled Water Setpoint and a Filtered
53
47
56
50
Current Limit Setpoint. After the compressor has been
49
40
started, the starting point of the filtered chilled water
53
47
setpoint is initialized to the value of the Evap Leaving
56
50
Water Temperature. The filtered current limit setpoint
is initialized to the value of the Current Limit Softload
Starting Percent. These filtered setpoints allow for a
stable pull-down that is user adjustable in duration. They
also eliminate sudden transients due to setpoint changes
during normal chiller operation.
3 settings are used to describe the behavior of soft
1000
2000
loading. The setup for soft loading can be done using TU.
53
46
60
53
• Capacity Control Softload Time: This setting controls the
62
56
time constant of the Filtered Chilled Water Setpoint. It is
58
51
settable between 0 and 120 min.
62
56
65
59
• Current Limit Control Softload Time: This Setting
58
51
controls the time constant of the Filtered Current Limit
62
56
65
59
Setpoint. It is settable between 0 and 120 minutes.
65
57
• Current Limit Softload Starting %: This setting controls
71
64
the starting point of the Filtered Current Limit Setpoint.
75
69
64
56
It is adjustable from 20 to 100% RLA.
71
65
74
69
Default
Evaporator Freeze Avoidance
Request
Condenser Freeze Avoidance
Request
Compressor Running
Latching Alarm
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
25
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