Bedienungsanleitung Viessmann VITOCAL 250-A (Seite 54 von 72) (Englisch)

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Clean the surface of the programming unit with a

microfibre cloth.

!Please note

Commercially available domestic cleaning

agents and special cleaning agents for the heat

exchanger (evaporator) can damage the indoor

and outdoor units.

■Clean the appliance surfaces only with a damp

cloth.

■If necessary, clean the heat exchanger (evap-

orator) fins on the back of the outdoor unit only

with a hand brush with long bristles.

Danger

The sharp edges of the heat exchanger (evapo-

rator) fins can cause cut injuries.

Do not touch the fins on the back of the outdoor

unit.

Danger

The hot or cold fins of the heat exchanger

(evaporator) can cause burn or frostbite injuries.

Do not touch the fins on the back of the outdoor

unit.

!Please note

Commercially available cleaning agents can

damage the surface of the external casing.

■Use only mild water-based domestic cleaning

agents.

■Do not use substances containing acids or

solvents, such as vinegar-based cleaners,

nitro or synthetic resin solutions, nail varnish

remover, ethyl alcohol, etc.

!Please note

Mechanical impact will scratch the surface of the

external casing.

■Wipe the surface with a soft damp cloth only.

■Do not use substances that contain abrasive

particles such as polishes, scouring agents,

dirt erasers or scouring pads.

■Do not clean the external casing with a pres-

sure washer.

Inspection and maintenance

The inspection and maintenance of a heating system

is prescribed by the German Buildings Energy Act and

the DIN 4755, DVGW-TRGI 2018, DIN 1988-8 and

EN 806 standards.

Regular maintenance ensures trouble-free, energy effi-

cient, environmentally responsible and secure heating

and cooling operation. For this, it is best to arrange an

inspection and maintenance contract with your local

contractor.

Note

Your outdoor unit contains highly flammable refrigerant

of safety group A3. To ensure operational reliability

over the entire service life of the heat pump, there are

special requirements for inspection and maintenance.

A special test of safety equipment is required after

12 years. Please contact your contractor.

DHW cylinder

Standard EN 806-5 specifies that maintenance and

cleaning should be carried out no later than 2 years

after commissioning and as required thereafter.

Only a qualified contractor should clean the inside of

the DHW cylinder and the DHW connections.

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.

Safety valve (DHW cylinder)

The function of the safety valve must be checked

every six months by the user or a contractor through

venting (see valve manufacturer's instructions). The

valve seat may become contaminated.

Water may drip from the safety valve during a heat-up

process. The outlet is open to the atmosphere.

!Please note

Overpressure can cause damage.

Do not close the safety valve.

Maintenance

Cleaning

6199646

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