Switching On The Heating System; Shutting Down The Heating System - Viessmann vitotronic 300-k Operating Instructions Manual

Vitotronic 300-K Operating

Switching on the Heating System

Legend
A ON/OFF switch
B Fuse
C ON indicator (green)
D Fault indicator (red)
E Emissions test switch
(only for service purposes)
Ask your heating contractor about the following:
H Boiler and relevant control unit type
H Required system operating pressure
H Location of the following components:
– Pressure gauge
– Gas shut-off valve
– Vents

Shutting Down the Heating System

With frost protection monitoring
For each heating circuit select the "standby mode"
operating program (see page 13).
H No central heating
H No DHW heating
H Frost protection for the boiler and the DHW tank
is active.
Pump exercise function
Circulation pumps are started for 10 sec. once every 24
hours to prevent the pumps from seizing up. This function
is active during all operating programs and during warm
weather shutdown.
Refer to the applicable boiler Operating
Instructions for gauge location and minimum
operating pressure.
1. Check the heating system pressure at the pressure
gauge (each boiler is equipped with a pressure gauge).
If the pressure of the heating system is too low,
top up the water or notify your heating contractor.
2. Open the gas shut-off valve on every boiler.
3. Switch ON the power supply, e.g. at a separate MCB/
fuse or a mains isolator.
4. Switch ON the ON/OFF switch on every control unit.
After a short delay, the home screen or the default
display appear.
The green ON indicator illuminates. Your heating
system and, if installed, your remote controls are now
ready for use.
Without frost protection monitoring (shutdown)
1. Switch OFF the ON/OFF switch on every control unit.
Refer to the applicable boiler Operating Instructions
2. Close the gas shut-off valves.
3. Isolate the heating system from its main power supply,
e.g. at the separate MCB/fuse or at a mains isolator.
Note: If outdoor temperatures of below 37°F (3°C) are
expected, take appropriate measures to protect
the heating system from frost.
If necessary, contact your heating contractor.
Information on a prolonged shutdown
H Circulation pumps may seize up as they are not being
supplied with power.
H It may be necessary to reset the date and time the next
time the system is switched on (see page 22).
Start-up/Shutdown
9