Checking Static Pressure And Supply Pressure - Viessmann Vitocrossal 200 Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps

Checking static pressure and supply pressure

A
Static pressure
1. Close the gas shut-off valve.
2. Undo the screw in test nipple A, but
do not remove.
3. Connect the pressure tester at test
nipple A.
4. Open the gas shut-off valve.
5. Check the static pressure (max.
60 mbar).
6. Record the actual value in the report
(on page 74).
16
(cont.)
Supply pressure
1. Start the burner.
Note
For commissioning, see page 13.
Switch the burner to maximum heat-
ing output. For this, activate the emis-
sions test switch at the control unit.
2. Check the supply pressure (flow
pressure), see table on page 17.
Note
The supply pressure (flow pressure)
must be between 18 and 50 mbar for
natural gas and between 42.5 and
57.5 mbar for LPG.
Nominal supply pressure for natural
gas: 20 mbar
Nominal supply pressure for LPG:
50 mbar
The boiler is factory-fitted with two
gas pressure switches. The gas pres-
sure switches are set to 10 mbar. For
LPG, set both gas pressure switches
to 20 mbar.
3. Record the actual value in the report
(on page 74).
4. Close the gas shut-off valve.
5. Remove the pressure tester and
close test nipple A.