Mechanical Ventilation Terminology - Viessmann VITODENS Operating Instructions Manual

Heating terminology
Safety valve
Safety equipment that must be installed in the cold
water line by your heating contractor. The safety valve
opens automatically to prevent excess pressure in the
DHW cylinder.
Solar circuit pump
In conjunction with solar thermal systems.
The solar circuit pump delivers the cooled heat transfer
medium from the indirect coil of the DHW cylinder to
the solar collectors.
Set temperature
Specific temperature that should be reached, e.g. set
DHW temperature for example.
Summer mode
Operating program "Only DHW".
In warmer months, you can switch off heating mode.
The boiler remains operational for DHW heating. Cen-
tral heating is switched off.

Mechanical ventilation terminology

Mechanical ventilation
A mechanical ventilation system provides continuous
ventilation of your interior. The mechanical ventilation
system comprises a ventilation unit, the ductwork, as
well as supply air and extract air valves.
An outdoor air filter installed in the ventilation unit pro-
tects against the ingress of pollen.
(cont.)
Cylinder loading pump
Circulation pump for heating the potable water inside
the DHW cylinder
Drinking water filter
A device that removes solids from the water. The
drinking water filter is installed in the cold water pipe
upstream of the DHW cylinder or the instantaneous
water heater.
Weather-compensated mode
See "Heating mode"
DHW circulation pump
The DHW circulation pump transports the DHW
around a loop line between the DHW cylinder and the
draw-off points (e.g. hot tap). This ensures that hot
water is rapidly available at the draw-off points.
Operating principle of the ventilation unit
B
C
A
F
Fig. 42
Supply air
A
(e.g. for bedrooms, children's room, living room)
Exhaust air
B
Outdoor air
C
Extract air
D
(e.g. from kitchen, bathroom, WC)
Bypass not enabled, ventilation with heat recovery
E
Bypass active, ventilation without heat recovery
F
Appendix
E
D
63