Samsung AM CNB C AA Series Technical Data Book page 67

13. Installation
Booster heater connection
▶ Connect a booster heater to B7, B8 of the PBA terminal block .
Specification table
Part
Terminal block (Output)
Connection type
L
N
Booster heater
Relay
PCB
B7
Terminal board
L
Power
N
B8
M/C
Specification
B7, B8
Booster heater (No-voltage contact)
V2
V1
Booster
heater