Maintenance; Cleaning; Renovations; Inspection And Maintenance - Viessmann PLC VITOCAL 350-HT PRO Operating Instructions For The System User

Maintenance

Cleaning

All equipment can be cleaned with a commercially
available domestic cleaning agent (non-scouring).
Clean the surface of the programming unit with the
microfibre cloth provided.

Renovations

If you carry out any renovations, make sure that you
are able to keep the heat pump in the same place.

Inspection and maintenance

The inspection and maintenance of a heating system
is prescribed by the Energy Savings Ordinance [EnEV,
Germany] and the DIN 4755, DIN 1899-8 and DIN 806
standards.
Regular maintenance ensures trouble-free, energy effi-
cient and environmentally responsible heating. For
this, it is recommended that you take out an inspection
and maintenance contract with your local heating con-
tractor or your Viessmann agent.

DHW cylinder

Standards DIN 1899-8 and DIN 806 specify that main-
tenance and cleaning should be carried out no later
than 2 years after commissioning and as required
thereafter.
Only a qualified heating contractor should clean the
inside of a DHW cylinder and the DHW connections.

Safety valve

Check the safety valve function every six months by
venting, or have it checked by your heating contractor
(see valve manufacturer's instructions). The valve seat
may become soiled.

Drinking water filter

For reasons of good water hygiene, proceed as fol-
lows:
■ Replace filter element on non-backwashing filters
every 6 months (visual inspection every 2 months)
On backwashing filters, backwash every 2 months
■
The tightness of the system must be re-checked at
every inspection or service in order to ensure system
safety.
If any water treatment equipment (e.g. a sluice or
injection system) is installed in the cold water supply of
the DHW cylinder, ensure this is refilled in good time.
For this, observe the manufacturer's instructions.
Maintenance
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