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ACCESSORIES INSTALLATION
ENGLISH
External pump
External pump (3rd-party) can be utilized if internal pump cannot overcome system pressure
losses; if secondary pump is needed (in case parallel buffer tank) or - if two heating circuits are
needed - as circuit pump to feed the radiator circuit.
How to wire external pump
Follow below procedures step 1 ~ step 3.
Step 1. Check if the power of the unit is turned off.
Step 2. Disassemble front panels and distinguish terminal block in Indoor PCB.
Step 3. Connect signal cable to terminal block fully.
CN_PUMP_A2
Indoor PCB
Pump
L
Power
N
MAGNETIC
CONTACTOR
230VAC
50 Hz
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