LG PAHCNM000 - Electrical Wiring (if Using a Belt Driven Fan)

AHU SENSOR CONNECTION
25
ENGLISH
Return
air
Exhaust
air
Outdoor
air
Supply
air
Circuit breaker
Magnetic
Contactor
On-site wiring
Power source for motor
operation, 3-phase
<Main Power Switchboard>
Main module
<AHU control kit>
RSTN
ELB(SA)
MC(RA)
EOCR EOCR
MC(SA)
L
N
DO5 DO6
AC 220/AC
24 V transformer
TR
ELB
MC
Overcurrent
circuit breaker
EOCR
TR
220 V
24 V
ELB(RA)
Electrical Wiring (if using a belt driven fan)
• If the supply air/return air fan is driven by a constant speed motor, the motor can be powered
using the main switchboard's magnetic contactor.
• Always install an earth leakage breaker when connecting a constant speed motor.
• Refer to “Technical Standards for Electrical Equipment” for installation standards for earth
leakage breakers.
• Use AC 24 V for the magnetic connector's operation contact. Failure to do so could result in the
malfunctioning of the Control Kit.