Rinnai
5
3PH Auxiliary Relay Box OIM
IMPORTANT
The 3-phase auxiliary relay box must be directly connected to a 415 V AC 50 Hz mains power
supply. The 3-phase auxiliary relay box must be on its own circuit with an isolating switch installed
at the switchboard. A secondary isolating switch must be installed within reach of the box.
Connect all
ACTIVE
and
NEUTRAL
wires in accordance with the wiring diagram. Ensure the
incoming
EARTH
wire is securely fixed to the earth post.
NOTE
Select suitable cable size according to the electric element capacity of the tank. Normally each
3-phase auxiliary relay box works with one electric tank.
AUXILIARY BOOSTER SIGNAL
Wire terminals “3” and “4” to heat pump with a minimum 0.75mm
2
two-core cable (provided by installer). The cable
length should be less than 10 metres.
POWER SUPPLY TO ELECTRIC TANK
Connect all active, neutral and earth wires directly from the contactor or terminals and wire to electric tank. Normally
each 3-phase auxiliary relay box works with one electric tank. Refer to the electric tank wiring diagram for tank
wiring.
L1 L2 L3
N
L1 L2 L3 N
3 4
To Electric Tank
To Heat
Pump
Main Power Supply
BASIC OPERATION
