LG PRARH1, Installation Manual, Page: 10 / 54

10 Auxiliary Heater Relay Kit
n
4 Way CST
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
Aux heater
communication lines
AB
AB
Check the attached direction to the indoor unit.
Aux heater
communication lines
※
Wiring
Assembly Diagram
Aux heater
communication lines
Aux heater
communication lines
Aux heater Aux heater
communication lines
communication lines
Aux heater
communication lines
Aux heater
communication lines
Step1. Open front panel. Step2. Assemble PRARH1 with cabinet.
Step3. Open the cover of PRARH1 and connect wires. Step4. Assemble control box cover and front panel.
CAUTION
Fig. A
Control box cover
screw
Insulation
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.