Switching The System Off; Switching On The System - Viessmann VITODENS 200-W Operating Instructions For The System User

Switching on and off

Switching the system off

Shutting down heat generation with frost protection monitoring ("Standby mode")
For every heating circuit, select the "Standby mode"
operating program and switch off DHW heating: See
page 27 and 32.
■ No central heating
No DHW heating
■
Frost protection for the heat generator and the DHW
■
cylinder is enabled.
Switching off heat generation without frost protection monitoring
■ No central heating
■ No DHW heating
■ Frost protection for the heat generator and the DHW
cylinder is not enabled.
1. Turn off the ON/OFF switch: See page 46.
2. Close the gas shut-off valve.
!
Please note
If outside temperatures of below 3 °C are
expected, take appropriate measures to pro-
tect the system from frost.
If necessary, contact your contractor.

Switching on the system

Vitodens 200-W
D C B
Fig. 13
Note
The control unit can be located at the top or bottom.
Gas shut-off valve
A
Drain & fill valve
B
ON/OFF switch
C
System pressure (shown on display)
D
46
A
Note
■ All circulation pumps connected to the control unit
are briefly started every 24 hours to prevent them
from seizing up.
The diverter valves are switched over at regular
■
intervals.
Note
■ As they are not being supplied with power, the circu-
lation pumps and diverter valves may seize up.
If your system has been shut down for a prolonged
■
period, you may need to reset the "Time" and
"Date": See page 36.
Vitodens 222-W
B A
Fig. 14
Note
The control unit can be located at the top or bottom.
Gas shut-off valve
A
Drain & fill valve
B
ON/OFF switch
C
System pressure (shown on display)
D
C D