Checking The Static And Supply Pressure - Viessmann VITODENS 222-F Service Instructions Manual

Vitodens 222-F B2TA 19 and 35 Service

Checking the Static and Supply Pressure

Operation with LPG
Flush the LPG tank twice during commissioning or
replacement. Purge the tank and gas supply line
thoroughly after flushing.
Running supply pressure with
NG LPG
under 4 "w.c. under 10 "w.c.
4 to 14 "w.c. 10 to 14 "w.c.
over 14 "w.c. over 14 "w.c.
WARNING
Gas escaping from the test nipple leads to a risk of
explosion. Check gas tightness at test nipple A.
Corrective action
Do not start the boiler.
Notify your gas supply
utility or LPG supplier.
Start up boiler.
Do not attempt
adjustment. Call local
gas utility to decrease
pressure or install up
stream gas pressure
regulator. Boiler valve
must not be exposed to
pressure over 14 "w.c.
1. To measure static and/or running pressure remove
boiler enclosure panel as indicated page 11 and 14
in these instructions.
2. Close gas shutoff valve.
3. Loosen screw at inlet gas pressure port A on the
gas combination valve, do not remove completely.
Connect manometer.
4. Open the gas shutoff valve.
5. Measure static pressure. Values must be:
14 "w.c. max. for NG
14 "w.c. max. for LPG
6. Enter measured value into Maintenance Record on
page 103 in this manual.
7. Start up boiler, using the ON/OFF switch "
the boiler control.
8. Measure the running pressure, see chart.
9. Enter gas type into Maintenance Record on page
103 in this manual.
10. Switch off the ON/OFF switch "
control, close the gas shut-off valve, remove the
manometer and re-tighten the screw at inlet gas
pressure port A.
IMPORTANT
The burner is automatically ignited and starts operation
after a safety time has elapsed. During initial start-up,
the unit may indicate a fault because of air in the gas
supply pipe (especially for liquid propane gas). After
approximately 5 seconds, press the "R" button to reset
the burner. The ignition procedure is repeated. This boiler
employs a direct spark ignition system.
WARNING
Ensure that there is no open flame in the room.
WARNING
CO build-up as a result of incorrect burner adjustment
can have serious health implications.
Carry out a CO test before and after work on gas
appliances.
WARNING
Never purge a gas line into a combustion chamber.
Never use matches, candles, flame, or other sources of
ignition for purpose of checking leakage. Use a soap and
water solution to check for leakage. A failure to follow
this warning could result in fire, explosion, personal injury
or death.
Start-up
8 " on
8 " on the boiler
17