Heating Circuit; Heating Circuit Pump; Room Temperature; Safety Valve - Viessmann VITOCROSSAL 300 CU3A 35 Operating Instructions Manual

Additional Information
Terminology
(continued)

Heating circuit

A heating circuit is a sealed circuit between the boiler
and radiators, in which the heating water circulates.
A heating system may comprise several heating circuits.
For example, one heating circuit for the rooms
occupied by you and one heating circuit for the rooms
of a separate apartment.

Heating circuit pump

Circulation pump for the circulation of the heating
water in the heating circuit.

Room temperature

H Standard room temperature:
For periods when you will be at home during the day,
set the standard room temperature.
H Reduced room temperature:
For periods when you will be absent or during the
night, set the reduced room temperature. See also
"Heating mode".

Safety valve

A safety device that must be installed in the cold water
pipe by your heating contractor. The safety valve
opens automatically to prevent excess pressure in the
DHW Tank.
Vitocrossal 300 CU3A 26 to 57 Operating

Solar circuit pump

In conjunction with solar thermal systems.
The solar circuit pump transports the heated heat
transfer medium from the collectors into the indirect
coil of the DHW tank

Set temperature

Default temperature that should be reached; e.g. set
DHW temperature.

DHW pump

Circulation pump for heating the DHW in the DHW tank.

Drinking water filter

A device that removes solids from the drinking water.
The drinking water filter is installed in the cold water
pipe upstream of the DHW tank or the instantaneous
water heater.

Weather-compensated heating mode

See "Heating mode".

DHW recirculation pump

The DHW recirculation pump transports the DHW
around a ring pipeline between the DHW tank and
the draw-off points (e.g. hot tap). This ensures that hot
water is rapidly available at the draw-off point.