RT-SVD03G-EN 35
ReliaTel Refrigeration Module (RTRM)
Note: Version 1.1 and 1.3 RTRM do not provide Heat, Cool, Service, Cool Fail, Heat Fail indications
for Programmable ZSM. Later versions (with a higher number) do.
COMM3/4 and COMM5 Communication Interface Module use MODBUS communication directly
with the RTRM. Tracker and Tracer require inputs as shown:
Note: VariTrac does not require any input to J6
Table 4. Default operation for ICS control:
J6 input/connection if no input this happens:
J6-1- Zone temperature Unit stops unless Tracer is providing zone temperature input (CV units)
J6-2- Common terminal for J6-1, J6-3, J6-4, J6-5
Unit stops unless Tracer is providing zone temperature input (CV units)
or mode input (VAV units).
J6-4 Mode input (VAV units) Unit stops unless Tracer is providing a Mode input.
Table 5. Conventional ZSM thermostat-default operation
Input/connection if no input, this happens:
G (Indoor fan)
The purpose of G is to provide a way to run the fan continuously
A heat or cool call will also enable the fan.
See section on Conventional Thermostat Operation for more on this.
Table 6. 27.5-50 Ton VAV Units
Input/connection (27½ to 50 ton VAV only) If no input, this happens:
Default mode input jumper J6-2 to J6-4. Without a mode input, the unit will not run.
Zone temperature input J6-2 to J6-1
Unoccupied mode (short J6-11 to J6-12).
Gives cool fail diagnostic.
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