Bedienungsanleitung Viessmann VITOCAL 252-A (Seite 13 von 72) (Englisch)

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The appliance is only intended to be installed and

operated in sealed unvented heating systems that

comply with EN 12828, with due attention paid to the

associated installation, service and operating instruc-

tions.

Depending on the version, the appliance can only be

used for the following purposes:

■Central heating

■Central cooling

■DHW heating

The range of functions can be extended with additional

components and accessories.

Intended use presupposes that a fixed installation in

conjunction with permissible, system-specific compo-

nents has been carried out.

Commercial or industrial usage for a purpose other

than central heating/cooling or DHW heating shall be

deemed inappropriate.

Incorrect usage or operation of the appliance (e.g. the

appliance being opened by the system user) is prohibi-

ted and will result in an exclusion of liability. Incorrect

usage also occurs if the components in the heating

system are modified from their intended function.

Note

The appliance is intended exclusively for domestic or

semi-domestic use, i.e. even users who have not had

any instruction are able to operate the appliance

safely.

Product information

Your air source heat pump consists of an indoor unit,

plus an outdoor unit that is installed outside the build-

ing.

To operate the heat pump, heat from ambient air is

recovered in the outdoor unit. To achieve this, a fan

draws the ambient air through a heat exchanger (evap-

orator). In the evaporator, the thermal energy from this

ambient air is transferred to the refrigerant circuit.

Here, the temperatures necessary for room heating

and DHW heating are generated. The heat passes to

the indoor unit via the hydraulic connection lines.

The indoor unit transfers the heat from both heat sour-

ces into your heating system.

To provide room cooling, the heat pump's refrigerant

circuit operates in reverse mode. Heat is extracted

from your rooms and transferred to the ambient air via

the evaporator.

The refrigerant circuit is driven by the compressor.

Compared with the thermal energy derived from the

air, the compressor only requires a small amount of

electrical power. This power is often provided at a

favourable tariff by your power supply utility.

Depending on the tariff conditions and the power sup-

ply, your power supply utility may make short-term

interruptions to the heat pump power supply (power-

OFF), e.g. if there is high network load. During power-

OFF, the electric booster heater (instantaneous heat-

ing water heater) built into the indoor unit can take

over the supply of heat to the building. This instantane-

ous heating water heater is then automatically

switched on if the heating output of the heat pump is

insufficient. If there is a fault on the heat pump, you

can switch on emergency mode.

If your system has an external heat generator, e.g. a

gas boiler, this is operated by the heat pump control

unit as a second heat source.

You can combine the heat pump with this heat genera-

tor in the best way to suit either ecological or economic

priorities (hybrid operation). The two heat sources

operate individually or together, depending on the

operating situation.

If an external heat generator is connected, it will take

over the entire room heating for the building during a

power-OFF period.

Heat pump control unit

The heat pump control unit is integrated into the indoor

unit and controls all functions of your system. The con-

trol unit is operated via a 7 inch colour touchscreen.

To adjust the functions for hybrid operation you will

need the ViCare app.

Communication modules for the following functions are

integrated into the heat pump control unit:

■Connection to a WiFi router, e.g. for remote control

via the internet with an app.

■Direct WiFi connection to a mobile device ("Access

point")

■Data transmission via mobile phone network

■Connection of wireless accessories, e.g. remote con-

trol

Introductory information

Intended use

6199646

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