3.23. Resistor Replacement
If one of the resistors is short- or open-circuited, the cables are deformed or another physical
deformation occurs, the resistor may be replaced without removing the exchanger tank. For tank
replacement, drain the water inside the tank with the drain valve, and loosen the resistor flange.
Afterwards, disassembly the resistor to be replaced by removing the lower or upper service panel
depending on whether the resistor is at the bottom or the top of the tank, install the new one into the
same place of the device, and tighten the flange.
You can replace the resistor more easily by obtaining the 7006250177 coded resistor spring sleeve.
When tightening the phase inlet cables, M4 washer, cable terminal ring, M4 spring washer and M4
nut should be installed respectively. While turning the nut with the wrench from the top side, the
terminal of the resistor should be fixed with a 1/4 inch wrench from the bottom side.
For phase cable assembly:
Suitable Hand Tool: Hex-Box Wrench no. 7 and 1/4 inch open-end wrench
Suitable Hand Tool: AA 62 Wrench or 7006250177 Resistor Spring Sleeve
ATTENTION: In case of a resistor replacement, a resistor with the same capacity as the one
that was removed must be installed. Otherwise, damage to the device or plumbing may occur.
3.24. Controller and Sensor Connections
The end of the transition rubber is cut off and threaded into the thermostat cable.
The phase and neutral terminals of the thermostat cable are plugged into the terminal entries shown in
controller connection diagram.
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