185
Installation
according to national regulations.
Correctly mount cable water proof head and electrical box
cover, preventing short circuit caused by water intruding into
electrical box.
Thermistor of DHW tank is weak current signal, preventing
mixed with strong current signal.
The DHW tank must have temperature protection devices
recommended in this section to ensure the power supply of
temperature is too high.
8.3.10.3.4 WIRING OF AUXILIARY ELECTRIC HEATER
The auxiliary electric heater needs to meet the relevant requirements
of local laws and regulations. It is necessary to protect it through a
temperature fuse and a temperature protection switch.
1 Electric heater power ≤ 3 kW.
2 Electric heater power >3 kW.
When the power of the electric heater is greater than
3kW,the terminal 3(CM)/4(FM) only provides control signals
Codes Indications
Recommended
parameters
AEH
Auxiliary electric heater
assembly
EH Auxiliary electric heater
TFe
Temperature fuse or
Temperature control switch
Protection value
90°C
THe Temperature control switch
Protection value
75°C
AR5 AC contactor (repeater)
Selection according to
FU Fuse
according to national regulations.
Correctly mount cable water proof head and electrical box
cover, preventing short circuit caused by water intruding into
electrical box.
The auxiliary electric heater must have temperature protection
devices recommended in this section to ensure the power
the auxiliary electric heater temperature is too high.
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