Start-Up/Shutdown Switching The Heating System On - Viessmann VITODENS Operating Instructions Manual

Start-up/shutdown
Switching the heating system on
A B C
2
1 3
0 4
bar
E
Fig. 14
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 operating program
"Standby mode".
■ No central heating
■ No DHW heating
■ Frost protection for the boiler and the DHW cylinder
is active.
Without frost protection monitoring (shutdown)
1. Turn off the ON/OFF switch.
2. Close the gas shut-off valve.
22
3°
0°
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 "Switching central heating off" on
page 26.
Note
The circulation pumps are briefly started every 24
hours to prevent them from seizing up.