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920-087-04 (8@5)
RemoteThermostatand LowVoltageControlConnections
Remote Thermostat
All Friedrich PD model PTAC units are factory configured to be
controlled byeither the chassis mounted Smart Center or a 24V
single stage remote wall mounted thermostat. The thermostat
may be auto or manual changeover as long as the control
configuration matches that of the PTAC unit.
To control the unit with a wall mounted thermostat follow
the steps below:
1) With thefront cover removed locatethelowvoltage terminal
strip at the lower portion of the Smart Center.
2) Remove thejumper between the 'GI2and GH' terminals.
3) The control is now configured for control bya wall thermo-
stat. The Smart Center will no longer control the unit.
4) If desired the accessory escutcheon kit (PDXRT) is to be
used, install itover the existing control panel.
Note:Torevert backtothe Smart Centercontrolofthe unitreplace
the jumper wire between the 'GI2and 'GH' terminals that was
removed in step 1.
Thermostat Connections
C = Common Ground
W = Callfor Heating
Y = Callfor Cooling
R = 24V Powerfrom Unit
GL = Callfor Low Fan
GH = Callfor High Fan
B = Reversing Valve Energized in heating mode
(PDH Models Only)
*If only one G terminal is present on thermostat connect to GL
for lowfan or to GHfor high fan operation.
Figure13
Control board with optional PDXRTescutcheon kit installed
{oo st o byWa l ® mostat
U;sewu 1o operate _t
18
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