Checking And Cleaning The Burner; Checking The Diaphragm Expansion Vessel And System Pressure - Viessmann Vitopend 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
2. Open drain screw A on the circu-
lation pump. Catch the water in a
suitable container.

Checking and cleaning the burner

Turn off the ON/OFF switch on the con-
trol unit and the power supply.
If required, clean the burner with com-
pressed air or a soapy solution.
Checking the diaphragm expansion vessel and system pres-
sure
Carry out this test on a cold system.
Commissioning, inspection, maintenance
(cont.)
Close the gas shut-off valve and safe-
guard against reopening.
4x
Flush with clean water.
53