Shutting Down The System - Viessmann Vitomax 200-HW Operating And Service Instructions

Commissioning, inspection, maintenance
Further details regarding the individual steps
17. Check the fittings for leaks prior to
and during the heat-up phase and
retighten, where required.
Retighten all fittings at max. per-
missible operating pressure. Tor-
que values under cold and hot
conditions:
Closure Dimen-
sions
Hand hole 100 x 150,
M16
Head hole 220 x 320,
M20
Manhole 320 x 420,
M24

Shutting down the system

Danger
Opening the boiler connections
and openings whilst the boiler
is under pressure can lead to a
high risk of severe injury.
Only open the connections on
the water and steam side and
inspection apertures after the
boiler has been completely de-
pressurised.
12
18. Check the boiler door(s) and
clean-out cover after approx. 50
hours for leaks and retighten all
screws.
Torque
100 Nm
200 Nm
350 Nm
1. Close the shut-off valves in the oil
lines (at the oil tank and filter) or
the gas shut-off valve.
2. Switch OFF the burner.
3. Isolate the system from the power
supply.
4. Close all valves.
(cont.)