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8 - ELECTRICAL CONNECTIONS
Scheme 2: the heat pump cannot operate together with the solar pump.
Electrical connections
CN26
Solar controller signal input
CN2
Solar pump control
CN11
Unit control
Operating logic
T5U
(Storage tank temp. sensor Upper)
≤ 60°C
≥ 65°C
Note: solar pump must be controlled through AC contactor.
The CN2 is not allowed to drive the pump directly.
Solar panel
Solar control unit
220-240
220-240
Enabled / disabled
CN26 (in)
CN2 (out)
220-240
220-240
0
0
When the solar control unit check the temperature is OK in
solar panel, it will output 220-240V signal.
Solar probe
SOLAR
CN11
PUMP
ON
ON
OFF
OFF
Power supply
Power supply
AC contactor
Solar pump
Unit
Disabled
Enabled
Solar probe
well
30
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