Checking The Function Of The Safety Equipment; Checking The Expansion Vessel And System Pressure - Viessmann VITOCROSSAL 300 Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
A B

Checking the function of the safety equipment

Check safety valves, water level and
pressure limiter in accordance with man-
ufacturer's details.

Checking the expansion vessel and system pressure

Note
Observe the information provided by the
expansion vessel manufacturer.
Carry out this test on a cold system.
14
1. Undo cap A from the back of the
boiler.
2. Check sensor well B for leaks.
3. Secure cap A.
Pump-controlled pressure maintain-
ing systems
Note
In heating systems with automatic pres-
sure maintaining equipment and/or dea-
eration systems (operating according to
the pressure reduction method for dea-
eration), install an expansion vessel
(DEV) as individual boiler protection.
(cont.)