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IM 938-4 / Page 29 of 42
disconnect, provide enough wire to move harness out of
the way for chassis removal.
2. If subbase is used, a small hole must be drilled and
grommeted in the subbase front to allow passage of the
low voltage wires.
3. When using a programmable wall thermostat, connect it
to the terminal board remote thermostat plug. Refer to
the instructions furnished with the chosen thermostat.
Note:
To allow Primary (Master) / Secondary (Slave)
operation, the primary board thermostat jumper must
be in the “T’STAT” position and the secondary boards
must be in the “SEC” position.
If secondary units are to be employed, see wiring
connections in
Figure 33
.
The number of secondary units that can be connected is
limited to 32 units.
Figure 33: Control Wiring to Allow Primary (Master)
Considerations
The Remote Thermostat can be any thermostat that can
interface with an electronic thermostat via RCWYBG
terminals. The Control Selection jumper must be in T’STAT
position. During a call the remote thermostat will pass R
back to the controller on a respective terminal. The push but
-
tons on the touchpad become inactive in the remote thermo
-
stat mode, EXCEPT in T'STAT mode, the fan speed can be
changed at the Touchpad and the fan mode is dictated by the
Remote t'stat. However, the control pad LED display will
indicate the mode of operation, and the room temperature.
Units that are furnished with remote mounted thermostats
should be wired as shown in
Figure 33
.
Other considerations
for this arrangement are as follows:
1. When wiring the low voltage plug and receptacle
Secondary (Slave) Unit Connection
Note:
Connect the Remote Thermostat only to the Master Unit.