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BASIC OPERATION
The 3-phase auxiliary relay box is used in conjunction with Rinnai commercial heat pump and electric tank and
operates by receiving "close" signal from the heat pump.
Depending on the installation of heat pump hot water system, a 3-phase auxiliary relay box (i.e. auxiliary booster
control box) may be supplied for supplementing heat at low ambient temperature. Terminals "3" and "4" from the
heat pump provide a power free signal to control the auxiliary booster (as shown below). Use a minimum 0.75mm
two-core cable (provided by installer) to wire to heat pump terminals.
The auxiliary booster has been interlocked with the heat pump to only operate under low ambient or fault conditions.
•
When ambient temperature falls below 5°C, auxiliary booster is activated. The auxiliary booster will operate
until the set point reaches. Auxiliary booster will remain active until the ambient temperature reaches above
7°C. Heat pump and auxiliary booster may work simultaneously.
•
When ambient temperature falls below 0°C, heat pump is deactivated. Heat pump won't activate until the
ambient temperature reaches above 2°C. Only the auxiliary booster will operate until the set point reaches.
•
When heap pump is in fault, auxiliary booster will operate instead of the heat pump until the set point
reaches. Auxiliary booster will remain active until the heat pump fault is cleared.
SPECIFICATIONS
Power Supply
Dimensions (mm)
Net Weight (kg)
Colour
Material
Ingress Protection Rating
MAIN POWER CONNECTION
The premises wiring to the heater MUST be capable of withstanding the appliance load. Refer to
the table "Specifications" on page 4 for load details.
WARNING
All electrical connections and wiring MUST be installed, maintained and removed by authorised
persons in accordance with AS/NZS 3000, and all other relevant local regulations and municipal
building codes including OH&S requirements.
Disconnect all power prior to installation and commissioning.
Rinnai
Tank Sensor
CHP3PH
AC415V~50Hz
290 (H) ×240 (W) ×150 (D)
4
Grey
ABS
IP44
Primary Pump
Auxiliary Booster
4
2
3PH Auxiliary Relay Box OIM
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