Add A Remote Thermostat; Remote Thermostat Selection - Friedrich Kuhl SM18M30 User Manual

to access any of the menus.

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
Figure 9
FP F2
POWER
CORD
TO REMOTE THERMOSTAT
Table 2
Interface Defi nitions
Terminal Code Wire Connection Function
C Common Ground Terminal
GH Call for Heating
GL Call for Compressor
24V Power from Electronic
B
Control to Wall Thermostat
Y Call for low fan
W Call for high fan
Call for heat pump reversing
R
valve
between terminals 11 & 12 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.
DISPLAY
ENTER
3. First Button pushed, illuminate the LCD.
14
920-198-00
THERMOSTAT CONNECTOR
F1 D2 D1 C GH GL B Y W
THERMOSTAT WIRE ROUTING USE #18
AWG COLORED THERMOSTAT WIRE
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.
R
Other thermostats may be used as long as they are confi gured correctly for the unit.
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.
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.
FRR004