Bedienungsanleitung Viessmann VITOTRONIC 200 (Seite 12 von 112) (Englisch)

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Outside temperature limits for air/water heat pumps /

Air/water heat pumps utilise outdoor air as the heat

source. They only operate efficiently within certain out-

side temperature limits, e.g. between –20 °C and

+35 °C. If the temperature rises above the upper limit

or falls below the lower limit, these heat pumps tempo-

rarily shut down. You will see a message about this on

the heat pump control unit.

In order to meet the heat demand for central heating

and DHW heating outside the temperature limits, the

heat pump control unit automatically switches on the

available auxiliary heaters as required, e.g. electric

booster heater.

Note

You must enable electric booster heaters for heat gen-

eration: See page 39.

Once the outside temperature is back within the tem-

perature limits, the heat pump is automatically ready

for operation again.

Temperature limits for brine/water heat pumps and water/water heat pumps

With brine/water heat pumps and water/water heat

pumps, the heat is transferred to the heat pump via the

heat transfer medium (brine). As heat sources, the

ground and groundwater remain at an almost constant

temperature level throughout the year. It is therefore

extremely unlikely that the permissible temperature

limits for brine entry into the heat pump will be excee-

ded or undershot.

If your brine/water heat pump or water/water heat

pump shuts down due to excessively high or low brine

inlet temperatures, there may be a fault. You will see a

message about this on the heat pump control unit. In

such cases, inform your local contractor.

Commissioning

The commissioning and matching up of the heat pump

control unit to local conditions and to the structural

characteristics of the building, plus the instruction of

the user in operating the system, must be carried out

by your heating contractor.

Note

These operating instructions also describe functions

that are only available on some heat pump models or

only with accessories. These functions are not specifi-

cally identified.

Your contractor will have listed the equipment and

functions of your heating system in the form on

page 102.

For questions relating to the scope of and accessories

for your heat pump and your heating system, contact

your contractor.

Your system is preset at the factory

Your heating system is preset at the factory and is

therefore ready for operation:

Central heating/central cooling

■Your home will be heated to 20 °C from 00:00 to

24:00 h "Set room temperature" (standard room

temperature).

■If a buffer cylinder is installed, this buffer cylinder will

be heated.

■Active cooling mode is blocked: See page 40.

DHW heating

■The DHW is heated every day from 00:00 to 24:00 h

to 50 °C "Set DHW temperature".

■Any installed DHW circulation pump is switched off.

■The electric booster heater, if installed, is enabled:

See page 39.

Introductory information

Product information (cont.)

5817913

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