Circuit Breaker Specification - LG Therma V Series Installation Manual

• European/International Technical Standard setting the limits for voltage changes, voltage fluctua-
tions and flicker in public low-voltage supply systems for equipment with rated current ≤ 75A.
• European/International Technical Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input current ≤16A of ≻75A per phase.

Circuit Breaker Specification

• Select a power source that is capable of supplying the current required by the AWHP.
• Use a recognized circuit breaker between the power source and the unit.
A disconnection device to adequately disconnect all supply lines must be fitted.
• Capacity of circuit breaker recommended.
• Separate main power supply and heater supply.
Model
Power
Indoor Outdoor
Supply
AHNW03604A2 AHUW036A2
AHUW056A2
AHNW09604A2 AHUW076A2
1~
AHUW096A2 220-240V
50Hz
AHUW126A2
AHNW16606A2 AHUW146A2
AHUW166A2
AHUW128A2
3N~
AHNW16809A2 AHUW148A2 380-415V
50Hz
AHUW168A2
Notes:
1. MCA / MOP
MCA = (1.25 x Load1) + Load2 + Load3
MOP = (2.25 x Load1) + Load2 + Load3
- Load1 : Rated running current of largest motor
(compressor or other motor)
- Load2 : sum of current for all other motors
- Load3 : any other load rated 1.0A or more
2. Select wire spec. based on the MCA
Core Component Electrical Spec.
Compressor Electric Heater Sanitary Tank Heater
RLA FLA Capacity Power RLA Capacity
(A) (A) (kW) Supply (A) (kW)
8 10
9.7 15 2+2 8.3
1Ø 230V
17 25 3+3 12.5
5.3 9.9 3+3+3 3Ø 400V 8.7
Piping and Wiring for Outdoor Unit
For
Heat Pump
Power FLA MCA MOP Circuit
Supply (A) (A) (A) Breaker (A)
9 16.6 20
13 23.9 20
3 1Ø 230V 12.5
22 40.3 40
6 11.1 10
3. Recommended circuit breaker is ELCB (Earth Leakage Circuit breaker)
4. RLA is measured during each individual compressor test condition.
MCA : Minimum Circuit Amperes (A)
MOP : Maximum rating Over current Protective device
RLA : Rated Load Amperes (A)
FLA : Full Load Amperes (A)
S/Heater: Sanitary Water Tan Heater
MCA, MOP & Circuit Breaker
For Electric Heater For Electric Heater
(without S/Heater) (with S/Heater)
MCA MOP Circuit MCA MOP
(A) (A) Breaker (A) (A) (A)
15 27 30 25 45
15 27 30 25 45
23 41 40 29 53
12 22 20 21 38
Installation Manual 45
Circuit
Breaker (A)
40
40
50
30