Explanation of connectors for other heating sources
A: HWTBH-Hot water tank back-up heater
B: HBH-Heating back-up heater
Terminal block 1-C
Terminal block 2-D
City power supply
PE N2 L12 L22 L32
L1 L2 L3
N2
PE
HWTBH Power Input
HWTBH Power Output
Terminal block 1-D
Terminal block 2-E
City power supply
PE N3 L13 L23 L33
L1 L2 L3
N3
PE
HBH Power Input
HBH Power Output
3. Installation
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