Electrical Wiring - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

5.5.4 Electrical wiring

(1) Connection of the power lines
(a) This multi-type room air conditioner receives its power from outside.
(b) It is necessary to use a single phase 200/240 V 50 Hz for the power supply.
(c) An earth leakage breaker and a circuit breaker must be installed.
Their capacities are listed below.
(d) Use the power supply wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified
wires.
Never bundle, wind or treat the power wires. Otherwise, heat or fire may be generated.
SCM452HENG-L
SCM452CENG-L
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H05 RNR3G4.0 (Example)
H Harmonized cable type
05 300/500 volts
R Natural-and/or synth. rubber wire insulation
N Polychloroprene rubber conductors insulation
R Stranded core
3 Number of conductors
G One conductor of the cable is the earth conductor (yellow/green)
4.0 Section of copper wire (mm
[POWER SUPPLY CODE]
CENELEC code for cables required field cables.
H05RNR3G 4.0
(e) After connecting the power supply wires, make sure to secure the wires with wiring clamps.
(2) Connecting the outside/inside crossover wires
(a) Ensure that crossover wiring is matched with crossover piping in A and B rooms.
(b) The length of the crossover wires should be under 25 m. If it longer than 25 m, signal errors between the units may occur and
cause the operation to shut down.
(c) Use the crossover wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified wires.
[INTERCONNECTING WIRING CODE]
CENELEC code for cables required field cables.
H05RNR4G 1.5
(d) Make sure the terminal numbers on the terminal board of the indoor and outdoor connections are correct.
(e) After connecting the crossover wires to the terminal board, use wiring clamps to secure the wiring.
Power source
UNIT A
1 2 1 2
Circuit
breaker
Earth
leakage
breaker
1 2 3
UNIT A
25A
25A
2
)
UNIT B
3 1 2 3 Out side
1 2 3 In side
UNIT B
SCM-HG (2 room)
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