8
9
Terminal "B" is
used for heat pump
models only.
Terminal "C"
is not used on RT1
thermostat
1. Remote Thermostat Selection & Wiring Guidelines for Packaged
Terminal Air Conditioners
Follow the instructions and recommendations of the thermostat manufacturer for installation and wiring. Do not
use a conventional heat pump thermostat with emergency electric heat selection for our heat pump units. Our
units make an automatic decision about turning on electric heat if the heating demand cannot be met by the heat
pump due to low outdoor temperatures.
Manual Changeover Thermostat
For Heat Pump equipped units:
A single stage, heat/cool thermostat with a terminal for a reversing valve operation
is required. Terminal "B" should be continuously energized in the heat mode and terminal "G" should be energized
whenever there is a call for heating or cooling. Typically, a heat/cool thermostat designed for use with electric heat
systems will meet the above requirements.
Unit Terminal Board
* A-Suffix models do not have a "C" terminal
Simplified Wiring Example
Thermostat Terminals
For Non-Heat Pump equipped units:
A single stage cooling and heating thermostat is required. Terminal "G"
should be energized whenever a call for heating or cooling is made. Typically a heat/cool thermostat designed
for use with electric heat systems will meet this requirement.
Honeywell Thermostat Terminal Designation
NOTE:
This unit is designed for use with a single stage thermostat only. Improper application of the
thermostat may result in property damage, personal injury or death.
CONTACT MADE
During call for cooling.
During call for heating.
Continuous if the slider is in the "Fan"
position, otherwise, intermittent.
For thermostats requiring a common
terminal
Directly from the transformer
Made continuously during call for
heating.
OPERATION
Cooling
Heating
Fan
Common Terminal
24 V
to the thermostat
Reversing Valve
TERMINAL LETTER
Y
W
G
C (common)
R
B
(Heat Pump units Only)
Remote Thermostat Unit Installation
NOTE:
It is the installer's responsibility to ensure that all control wiring connections are made in accordance with
the installation instructions. Improper connection of the thermostat control wiring and/or tampering with the unit's
internal wiring can void the equipment warranty and may result in property damage, personal injury or death. Other
manufacturer's PTACs and even older Friedrich models may have different control wire connections. Questions
concerning proper connections to the unit should be directed to the factory.
