Mitsubishi Electric CITY MULTI PUHY-P72-432TNU-A Data Book page 204

1. Installation information
1-1-5. Related equipment
Use an earth leakage breaker (ELB) with medium sensitivity, and an activation speed of 0.1 second or less.
Consult your local distributor or a qualified technician when installing an earth leakage breaker.
If the unit is an inverter type, select an earth leakage breaker able to respond to high harmonic waves and surges.
Leakage current is generated not only through the air-conditioning unit but also through the power wires. The leakage
current of the main power supply is therefore greater than the total leakage current of each unit. Take the capacity of the
earth leakage breaker or leakage alarm into consideration when installing one at the main power supply. To measure
the leakage current simply on site, use a measurement tool equipped with a filter, and clamp all the four power wires
together. The leakage current measured on the ground wire may not be accurate because the leakage current from other
systems may be included in the measurement value.
Do not install a phase-advancing capacitor on a unit connected to the same power system as an inverter-type unit and
its related equipment.
If a large current flows due to the malfunctioning of the product or faulty wiring, both the earth leakage breaker on the
product side and the upstream overcurrent breaker may trip almost at the same time. Separate the power system or
coordinate all the breakers depending on the system's priority level.
1-1-6. Unit installation
Your local distributor or a qualified technician must read the Installation Manual that is provided with each unit carefully
before performing installation work.
Consult your local distributor or a qualified technician when installing the unit. Improper installation by an unqualified
person may result in water leakage, electric shock, or fire.
Ensure that there is enough space around each unit.
1-1-7. Optional accessories
Only use accessories recommended by Mitsubishi Electric. Consult your local distributor or a qualified technician when
installing them. Improper installation by an unqualified person may result in water leakage, power leakage, system
breakdown, or fire.
Some optional accessories may not be compatible for use with the air-conditioning unit or may not be suitable for the
installation conditions. Check the compatibility when considering any accessories.
Note that some optional accessories may affect the air conditioner's external form, appearance, weight, operating
sound, and other characteristics.
1-1-8. Operation/Maintenance
Read the Instruction Book that is provided with each unit carefully prior to use.
Maintenance or cleaning of each unit may be risky and require expertise. Read the Instruction Book to ensure safety.
Consult your local distributor or a qualified technician when special expertise is required, such as when the indoor unit
needs to be cleaned.
MEES20K084
Installation information
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