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CHECK, MAINTENANCE, CARE
Do not use any abrasive cleaning agents or paint thinners (e.g. nitro, trichloroethylene, etc.) to clean the
device or the insulation. The best cleaning is to use a damp cloth adding a few drops of a liquid house-
hold cleaner. In hospitals and other public buildings, the prevailing regulations for cleaning and disinfec-
tion must be observed.
The bare-tube heat exchanger must be rinsed professionally before performing the initial installation (we
additionally recommend the installation of a dirt filter). If the straight-tube heat exchanger is not used for
the operation of the buffer tank (e.g. only electric heater), this must be closed to prevent corrosion cau-
sed by the condensate produced.
The heating water expansion vessel must be checked regularly to ensure it is functioning correctly.
It is recommended to compare the set temperature with the actual temperature present.
On the PZR/PZRR models, the temperature resistance (below-zero temperatures) of the solar circuit
should be checked at regular intervals.
ELECTRICAL CONNECTION OPTION
General Information:
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 wa-
terworks, as well as the standards of the Mounting and Operating Instructions, and must be performed
exclusively 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.).
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.
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.
Before the electrical commissioning, the buffer tank must be filled with water.
In line with the safety regulations, before anything is done to the buffer tank, it must be switched off and
secured to prevent it being switched on again. You should also check to ensure that it is not live. Actions
on the electrical system of the device may only be performed by a licensed electrician.
The electrical connection must always be made in accordance with the switching diagram of the built-in
heating used.
7
Id.Nr.: 237734-8
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