9
Id.Nr.: 234660-8 • GB
Execution: Operator, installing companies
Time interval every 6 months
Maintenance and Repairs:
If there should be no water or a permanent leakage on the safety valve when the water heater is heating
up, then the valve should be released by activating the lifting device several times or by trying to flush-out
any foreign bodies (e.g. lime-scale particles) that may be present on the sealing component.
If this should not be successful, then repairs should be made by calling in an installing company. In the
event of damage to the seating of the valve or sealing ring, the complete safety valve must be exchanged.
Execution: Installation companies
Time interval annually
In order to check the return valve, the shut-off valve should be closed and no water should flow out from
the opened check valve.
The operation of the storage tank is performed through the hot water valve of the fixture that is being used
(mixer tap). The storage tank is therefore permanently under line pressure. In order to protect the internal
boiler against excessive pressure during the heating-up process, the expansion water that results from this
is channelled through the safety valve. In order to prevent excess pressure damage to the hot water heater,
it is essential that lime-scale encrusted safety valves should be replaced. The return valve prevents the flow
back of the hot water into the cold water line network in the event of any reduction in the line pressure and
thereby protects the boiler against heating up without water. The storage tank can be separated on the
water side via the shut-off valve and thereby also in terms of pressure from the cold water line network and
can be emptied if need be via the drain valve.
11. Electrical Connection
11.1 General Instructions
The connection with the power grid must be implemented in conformity with the applicable national
regulations and standards, the relevant connecting requirements of the local power company and water-
works, as well as the standards of the Mounting and Operating Instructions, and must be performed ex-
clusively by a licensed electrician. The stipulated protective measures must be executed carefully, so that
no other power-supplied devices are affected thereby in the event of a malfunction or failure of the hot
water tank’s power supply (e.g. freezer, rooms used for medical purposes, units for intensive care, etc.).
In rooms with bathtubs or showers, the device must be installed in accordance with the national laws and
regulations (e.g. of ÖVE-SEV, VDE or DIN VDE 0100-701).
The technical connecting requirements (TAB) of the relevant energy supply company must absolutely be
observed.
A residual current circuit breaker with a tripping current I
∆n
≤30mA must be connected in series before the
electric circuit.
The device must only be connected with permanently laid lines.
These types of water heaters are to be supplied exclusively via a hard-wired connection cable and are
therefore not suitable for connection via a shock-proof plug (SKI). Accidental activation of the upstream
RCD is to be avoided in this way.
An all-pole disconnecting unit with at least 3mm contact clearance must be connected in series before
the device. This requirement is fulfilled e.g. by an automatic cutout.
It is imperative that the hot water tank is filled with water prior to electrical start-up.
In accordance with the safety regulations, the hot water tank must be switched powerless, secured
against being switched on again and checked for powerlessness prior to any intervention. Interventions
to the electrics of the device must only be performed by a licensed electrician.
As a rule, the electrical connection must be performed in accordance with the circuit diagram affixed
inside the connecting area of the tank!
