System Design; Electrical Work - Mitsubishi Electric PWFY-P-NMU-E-AU Engineering Manual

11. SYSTEM DESIGN

11-1. Electrical Work

11-1-1. General Cautions
Warning:
Electrical work should be performed by qualified electrical engineers in accordance with "Engineering Standards For Electrical
Installation" and the supplied installation manuals. Special circuits should also be used. If the power circuit lacks capacity or has an
installation failure, it may cause a risk of electric shock or fire.
1. Follow ordinances of your government organization for technical standard related to electrical equipment, wiring regulations,
and guidances of each electrical power company.
2. Power should be taken from the special branch circuit.
3. Install a ground breaker to the power.
4. Install the unit so that the control circuit cables (remote controller, transmission cables, or external input/output line) is not
in direct contact with the power cable outside the unit.
5. Ensure that there is no slack on all wire connections.
6. Vermin may have access to and damage the power, remote controller, and transmission cables. To prevent damage, insert
cables into metal piping.
7. Do not connect the power cables to the transmission cable leads.
8. Connect control cables to the indoor unit, remote controller, and the outdoor unit.
9. Ground the unit.
10. Select control cables following instructions.
Caution:
Be sure to put the unit to the ground on the outdoor unit side. Do not connect the ground cable to any gas pipe, water pipe,
lightening rod, or telephone cable. Improper grounding may cause electric shock.
11-1-2. Electrical characteristics of Indoor unit
• Provide a switch with at least 3 mm (1/8 in) contact separation in each pole when installing the air conditioner.
Model
Hz
PWFY-P36NMU-E-BU 60Hz
Model
Hz
PWFY-P36NMU-E-AU
60Hz
PWFY-P72NMU-E-AU
PWFY-26 PWFY-P-NMU-E-BU/PWFY-P-NMU-E-AU (Sept. 2010)
Unit
Voltage
Volts RLA(A)
range
208/230V 188 to 253V 12.30/11.12
Unit
Voltage
Volts RLA(A)
range
208/230V 188 to 253V 0.072/0.065
Symbols: MCA: Min. Circuit Amps (=1.25 x FLA)
Compressor
Max.
MCA(A)
Fuse(A)
25 25
Max.
MCA(A)
Fuse(A)
0.09 15
SC(A)
1.25