Checking All Connections And The Sensor Well On The Heating Water Side For Leaks; Checking The Function Of The Safety Equipment; Checking The Diaphragm Expansion Vessel And System Pressure - Viessmann VITOCROSSAL 300 Type CT3 Service Instructions Manual

Further details regarding the individual steps
Checking all connections and the sensor well on the heating
water side for leaks
Danger
There is a risk of injury when
working on pressurised compo-
nents.
Only open the connections on the
heating water side after the boiler
has been depressurised.
Only drain the boiler with a suc-
tion pump when the boiler air vent
valve is open.
A

Checking the function of the safety equipment

Check the safety valves, water level lim-
iter and pressure limiter in accordance
with manufacturer's details.

Checking the diaphragm expansion vessel and system pressure

Note
Observe the diaphragm expansion ves-
sel manufacturer's instructions.
Carry out this test on a cold system.
Commissioning, inspection, maintenance
1. Remove cap A from the back of the
boiler.
2. Check sensor well B for leaks.
3. Fit cap A.
B
(cont.)
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