Electrical Wiring - Rinnai DONSR20Z9 Operation & Installation Manual

13. ELECTRICAL WIRING

All the supplied parts, materials and electrical works must comply with local regulations.
Use only copper wires.
WARNING
Use a dedicated power supply for the air-conditioners. The power voltage must be in line with the
rated voltage.
The electrical wiring works must be carried out by a professional technician, and must comply
with the labels stated in the circuit diagram.
Before the electrical connection works are carried out, turn off the power supply to prevent
injuries caused by electric shock.
The external power supply circuit of the air conditioner must include an earth line, and the earth
line of the power cord connecting to the indoor unit must be securely connected to the earth line
of the external power supply.
Leakage protection devices must be configured according to the local technical standards and
requirements for electrical and electronic devices.
The fixed wiring connected must be equipped with an all-pole disconnection device with a
minimum 3 mm contact separation.
The distance between the power cord and signalling line must be at least 300 mm to prevent the
occurrences of electrical interference, malfunction or damage to electrical components. At the
same time, these line must not come in contact with the piping and valves.
Choose electrical wiring that conforms to the corresponding electrical requirements.
Connect to the power supply only after all the wiring and connection works have been completed,
and carefully checked to be correct.
13.1 Power Cord Connection
•
Use a dedicated power supply for the indoor unit that is different from the power supply for the outdoor unit.
•
Use the same power supply, circuit breaker and leakage protection device for the indoor units connected to
the same outdoor unit.
Outdoor power
supply
RCCB
Grounding line
Indoor power
supply
RCCB
Figure 23.
When connecting to the power supply terminal, use the circular wiring terminal with the insulation casing. See
Figure 25.
Use power cord that conforms to the specifications and connect the power cord firmly. To prevent the cord from
being pulled out by external force, make sure it is fixed securely.
If circular wiring terminal with the insulation casing cannot be used, please make sure that:
Do not connect two power cords with different diameters to the same power supply terminal (may cause overheating
of wires). See Figure 26.
Rinnai
Wire
Indoor unit
27
INSTALLATION INDOOR
L N
POWER INPUT
Figure 24. Power supply terminal of the
indoor unit
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