Checking The Static Pressure And Supply Pressure - Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors

Checking the static pressure and supply pressure

A
Fig. 11
Static pressure
1. Close the gas shut-off valve.
2. Undo the screw in test connector
remove.
3. Connect the pressure tester at test connector
Supply pressure
1. Start the burner.
Note
For commissioning, see page 15. Switch the
burner to maximum heating output. For this, acti-
vate the emissions test switch at the control unit.
2. Check the supply pressure (flow pressure); see the
following table.
Note
The supply pressure (flow pressure) for natural gas
should be between 18 and 50 mbar (1.8 and
5 kPa), and for LPG between 42.5 and 57.5 mbar
(4.25 and 5.75 kPa).
Nominal supply pressure for natural gas: 20 mbar
(2 kPa)
Nominal supply pressure for LPG: 50 mbar (5 kPa)
The boiler is factory-fitted with 2 gas pressure
switches. The gas pressure switches are set to
10 mbar (1 kPa). For LPG, set the two gas pres-
sure switches to 20 mbar (2 kPa).
4. Open the gas shut-off valve.
. Do not 5. Check the static pressure (max. 60 mbar/6 kPa).
A
6. Record the actual value in the report (on
page 62).
A .
3. Record the actual value in the report (on
page 62).
4. Close the gas shut-off valve.
5. Remove the pressure tester and then close test
connector
Commissioning, inspection, maintenance
.
A
17