Checking Static Pressure And Supply Pressure - Viessmann MatriX Service Instructions For Contractors

Reducing the maximum heating output (if...
5. Use or to select the required maximum heating
output.
6. S to confirm. If adopted successfully, "1" is shown
under "Service"; if it failed, "0" will appear.

Checking static pressure and supply pressure

Static pressure
Fig. 5
Supply pressure
1. Start the burner.
Note
For commissioning, see page 12. Switch the
burner to maximum heating output by activating
the emissions test switch at the control unit.
Boiler control unit service instructions
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). Nominal supply pressure for natural gas
20 mbar (2 kPa).
The boiler is factory-fitted with 2 gas pressure
switches. The gas pressure switches are set to 10
mbar (1 kPa).
7. S to change to the operating display.
8. R, the system will be restarted.
1. Close the gas shut-off valve.
2. Undo the screw in test connector
A
3. Connect the pressure tester at test connector
4. Open the gas shut-off valve.
5. Check the static pressure: Max. 60 mbar (6 kPa).
6. Record the actual value in the report (on
3. Record the actual value in the report on page 47.
4. Close the gas shut-off valve.
5. Remove pressure gauge. Close test connector
Commissioning, inspection, maintenance
(cont.)
remove.
page 47).
A , but do not
.
A
.
A
13