Shutting Down The Heating System - Viessmann VITODENS Operating Instructions Manual

Starting up the heating system
A B C
2
1 3
0 4
bar
E
Fig. 25
Fault indicator (red)
A
ON indicator (green)
B
Reset button
C
Ask your heating contractor about the following:
■ Level of the required system pressure
Position of the following components:
■
– Pressure gauge
Gas shut-off valve
–
– Vents
1. Check the heating system pressure at the pressure
gauge. The heating system pressure is too low if
the indicator points to the area below 1.0 bar. Top
up with water or notify your local heating contrac-
tor.
2. For open flue operation:
Check that the vents in the installation room are
open and unrestricted.
Note
With open flue operation, the combustion air is
drawn from the installation room.

Shutting down the heating system

With frost protection monitoring
For every heating circuit, select the "Standby mode"
operating program.
■ No central heating
No DHW heating
■
■ Frost protection for the boiler and the DHW cylinder
is enabled.
Without frost protection monitoring (shutdown)
1. Turn off the ON/OFF switch.
2. Close the gas shut-off valve.
D
ON/OFF switch
D
Pressure gauge (heating system pressure indica-
E
tion)
3. Open the gas shut-off valve.
4. Switch ON the power supply, e.g. at a separate
MCB/fuse or a mains isolator.
5. Turn on the ON/OFF switch.
After a short time, the standard menu is displayed.
The green ON indicator illuminates. Your heating
system and, if installed, your remote controls are
ready for use.
See also chapter "Stopping central heating" on
page 31.
Note
The circulation pumps are briefly started every 24
hours to prevent them from seizing up.
Start-up/shutdown
27