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14
FRR004
POWER
CORD
TO REMOTE THERMOSTAT
THERMOSTAT WIRE ROUTING USE #18
AWG COLORED THERMOSTAT WIRE
THERMOSTAT CONNECTOR
R
W
Y
B
GL
GH
CD1
D2
F1
F2
FP
Add a Remote Thermostat
Remote Thermostat – An external thermostat may be added to the air
conditioner to provide remote temperature sensing and control. The
thermostat interface connector is located on the panel behind the front
grille. To enable the remote thermostat operation, remove the jumper
CAUTION
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.
Failure to follow these instructions can
result in personal injury and damage to
product or other property.
Figure 9
between terminals
FP & F2
on the terminal block. Connect the thermostat
using Figure 9 and Table 2 as a guide.
If you connect an external thermostat, all Control Panel buttons will be
disabled with the following exception:
1. Maintenance commands (double button press & single button
extended press).
2. The
button for Freeze protection.
3. First Button pushed, illuminate the LCD.
4. Changing modes on the remote thermostat will not illuminate the
Control Panel LCD.
Remote Thermostat Selection
Friedrich recommends the use of either the RT4 or RT5. The RT4 is a
digital display thermostat with single speed fan control. The RT5 features
a digital display, two fan speed selection, battery backup and backlight.
For cooling models a single stage cooling thermostat with C, R, G, Y terminals must
be used. For electric heat ‘E’ models a single stage heating and cooling thermostat
with C, R, G, Y, W terminals must be used. For heat pump ‘Y’ models a single
stage heating and cooling thermostat with C, R, G, Y, W, B terminals must be used.
Interface Definitions
Terminal Code
C
GH
GL
B
Y
W
R
Table 2
Wire Connection Function
Common Ground Terminal
Call for High Fan
Call for Low Fan
Call for Heat Pump Reversing Valve
Call for Compressor
Call for Heating
24V Power from Electronic Control to
Wall Thermostat