Bedienungsanleitung Viessmann VITOTRONIC 200 (Seite 94 von 112) (Englisch)

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Heating/cooling circuits

A heating or cooling circuit is a sealed unvented circuit

between the heat pump and the consumers (e.g. radia-

tors), in which the heating water or coolant circulates.

A separate cooling circuit is a separate sealed unven-

ted circuit that supplies a cooling appliance, such as a

fan convector or a chilled ceiling. Cooling via a sepa-

rate cooling circuit is independent of the outside tem-

perature.

Heating and cooling of the entire interior can, if

required, be split over several heating circuits and one

cooling circuit.

Up to 3 heating circuits are possible ("Heating cir-

cuit 1", "Heating circuit 2", "Heating circuit 3"), e.g.

one heating circuit for the rooms occupied by yourself

and one heating circuit for the rooms of a separate flat.

Only one cooling circuit is possible:

■Heating/cooling circuit

Cooling operation via a heating circuit ("Heating cir-

cuit 1", "Heating circuit 2", "Heating circuit 3"),

e.g. a room with underfloor heating. This room can

be cooled in summer and heated in winter.

Cooling via the heating circuit only takes place when

the outside temperature has exceeded the cooling

limit. Heating via the heating circuit only takes place

when the outside temperature has fallen below the

heating limit. The cooling limit and the heating limit is

set by your qualified contractor.

■Separate cooling circuit

The separate cooling circuit ("Cooling circuit SKK")

can be connected to the heat pump control unit in

addition to the max. 3 heating circuits.

A separate cooling circuit cannot be used to provide

heating.

In these operating instructions, the heating circuits, the

heating/cooling circuit and the separate cooling circuit

are generally referred to as the heating/cooling cir-

cuits. A differentiation between the heating circuit,

heating/cooling circuit and separate cooling circuit is

only made in individual cases.

Example:

■"Heating circuit 1" is the heating circuit for the

rooms occupied by you.

■"Heating circuit 2" is the heating circuit for the

rooms of a separate apartment.

■"Cooling circuit SKK" is a separate cooling circuit

with fan convector for a storage room.

The heating/cooling circuits are designated at the fac-

tory as "Heating circuit 1", "Heating circuit 2",

"Heating circuit 3", "Cooling circuit SKK".

If you or your qualified contractor have renamed the

heating/cooling circuits, e.g. as "Apartment", that des-

ignation will be displayed instead of "Heating cir-

cuit..."/"Cooling circuit SKK".

Heating circuit pump

Circulation pump for the circulation of the heating

water in the heating/cooling circuit.

Instantaneous heating water heater

See "Electric booster heater".

Heating water/coolant buffer cylinder

A heating water/coolant buffer cylinder stores either

thermal energy for central heating or cooling energy for

central cooling.

To ensure that no condensation forms during central

cooling, heating water/coolant buffer cylinders have a

special type of thermal insulation.

All heating/cooling circuits are supplied either with

thermal energy or with cooling energy via the heating

water/coolant buffer cylinder.

You can switch between central heating and central

cooling via the extended menu.

For further information on buffer cylinders, see "Buffer

cylinders".

Appendix

Terminology (cont.)

5817913

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