Viessmann Vitodens 200, Service Instructions Manual

Page: 8 / 116

8
Initial start-up, inspection and maintenance
Further details regarding the individual steps
(cont.)
Checking the idle and the supply pressure
¨ ĂSafety instruction
Measure the CO value before and after any work on gas appliances, to
prevent any health hazards and to ensure the perfect operational condition of
the system.
LPG version:
Flush the LPG tank twice after installation or replacement.
Thoroughly vent the tank and gas lines after flushing.
Idle pressure
1. Close the gas shut-off valve.
2. Release the screw inside test
nippleĂ"PE"Ă A on the gas
combination valve, but do not
remove, and connect the pressure
gauge.
3. Open the gas shut-off valve.
4. Check the idle pressure; it should be
H max. 25Ămbar for natural gas
and
H max. 57.5Ămbar for LPG.
Record the actual value in the
service report.
5. Start up the boiler.
For function sequence and
possible faults during the initial
start-up, see pageĂ10.
On start-up, the boiler can enter a
fault state because of airlocks in
the gas pipe.
After approx. 5Ăseconds, press
keyĂ" EU " to reset the burner.
5692Ă485
G
B
PE
A