LG PRARH0 Installation Manual page 10

3. Assembly Diagram
■ 4 Way CST
Step1. Open control front panel.
Step2. Assemble PRARH0 with cabinet.
※ Wiring
Auxiliary Heater
communication lines
(under AC24V)
To indoor unit PCB
(CN-PTC)
※ Caution
Check the attached direction to the indoor unit.
10 Auxiliary Heater Relay Kit
Step3. Open the cover of PRARH0 and connect wires.
Step4. Assemble control box cover and front panel.