Trane R Series Diagnostic Troubleshooting Repair page 52

52
Module Power and Miscellaneous I/O
Table 18 Input Values vs. External Current Limit Setpoint
INPUTS
Resist (ohms) Current (ma)
49000 4.0
29000 6.0
19000 8.0
13000 10.0
9000 12.0
6143 14.0
4010 16.0
2333 18.0
1000 20.0
Setpoint Priority
There are many ways in which the Chilled Water and Current Limit setpoints
can be adjusted or reset when the Options Module is present in the Chiller
control system. The following flow charts show how these methods are prior-
itized and arbitrated under normal operating conditions. When abnormal
conditions are present, such as loss of Tracer communications or out of range
values on external setpoint inputs, the system will default to other methods.
Resulting Current
Voltage (Vdc) Limit Setpt (%RLA)±5%
2.0 40
3.0 50
4.0 60
5.0 70
6.0 80
7 .0 90
8.0 100
9.0 110
10.0 120
RLC-SVD03A-EN