Starting Central Heating/Cooling And Dhw Heating - Viessmann VITOCAL 300-A Operating Instructions Manual

Start-up/shutdown
Shutting down the heat pump
We recommend you contact your local
heating contractor before and after shut-
ting down your heat pump for longer peri-
ods.
Where necessary, your contractor can
then take certain steps, e.g. protecting
the system against frost.

Starting central heating/cooling and DHW heating

You want to heat or cool rooms and have DHW available.
Central heating
■ Central heating is only activated if the
outside temperature falls below the
heating limit. The heating limit can be
set by your local heating contractor.
Cooling via a heating circuit
■ Cooling via the heating circuit, e.g. an
underfloor heating system, only
occurs when the outside tempera-
ture has exceeded the cooling limit.
The cooling limit can be set by your
local heating contractor.
Cooling via a separate cooling circuit
(if installed)
■ Cooling with a separate cooling circuit,
e.g. chilled ceiling or fan convector,
occurs based on the room tempera-
ture. The cooling mode is always star-
ted if the room temperature exceeds
the starting limit. The starting limit can
be set by your local heating contractor.
Since it is independent of the outside
temperature, a separate cooling circuit
can provide cooling all year round, e.g.
for a storage room.
16
(cont.)
Note
Drain heat pumps installed outside if
they are shut down for longer periods.
Note
In the delivered condition, the cooling is
switched off. To enable the heat pump to
switch over to cooling mode (active cool-
ing), it needs to be enabled once. You
can cancel this enabled status at any
time (see page 39).