17
Id.Nr.: 228843-13
Electric water heater EKA, EKR, EWH, EKL
However, under no circumstances is it permissible to shut off the inflow line and the re-
turn line because this would make it impossible for the water inside the heat exchanger
to expand, which could damage the heat exchanger.
If the water heater is heated by its heat exchanger, then it must be ensured that in no
case the hot water temperature exceeds 85 °C, as otherwise the safety temperature
limiter of the electric heater can trigger and render it inoperable.
15. Electrical connection
15.1 General information
a) As a general rule, the electrical connection must be made in accordance with the
wiring diagram glued inside the connection chamber of the storage tank!
b) Ensure that the supply voltage is correct!
c) Fit an all-pole disconnector with 3mm contact opening width in the electric feeder.
Automatic circuit breakers can also be used as disconnectors.
d) The connection cable must be fed through the cable screw connection into the con-
nection chamber of the storage tank and protected with a strain relief mechanism
against pulling out and twisting. Tanks with heater battery have a second cable entry
point for the charge pump control cable.
e) For installation and intrusive interventions into the device, the hot water storage tank
must first be isolated completely (all poles) and on every side from the power supply
in compliance with EN 50110 (ÖVE, TAEV). Before carrying out any additional work,
the system must be secured against being switched on again (remove the fuses,
trigger the mains circuit breaker).
