Viessmann MatriX Service Instructions For Contractors page 10

Commissioning, inspection, maintenance
Checking static pressure and supply pressure
2. Loosen the screw in test connector
remove.
3. Connect the pressure tester at test connector
4. Open the gas shut-off valve.
Supply pressure
1. Start the burner.
Note
For commissioning, see page 7. Switch the burner
to maximum heating output by activating the emis-
sions test switch at the control unit.
2. Check the supply pressure (flow pressure); see
table on page 10.
Note
The supply pressure (flow pressure) should be
between 18 and 50 mbar (1.8 and 5 kPa). The gas
pressure switch is factory set to 10 mbar (1 kPa).
Never alter this setting.
Supply pressure
(flow pressure)
< 15 mbar
(1.5 kPa)
15 to 18 mbar
(1.5 to 1.8 kPa)
18 to 50 mbar
(1.8 to 5 kPa)
> 50 mbar (5 kPa)
10
A , but do not
.
A
Measure
Make no adjustments and notify the gas supply utility
Please note: The boiler may only be operated temporarily with this setting (emergen-
cy mode).
Notify the gas supply utility.
Start the boiler.
Install a separate gas pressure governor with zero off upstream of the boiler system.
Regulate the pressure to 20 mbar (2 kPa).
Notify your gas supply utility.
(cont.)
5. Check the static pressure (max. 60 mbar/6 kPa).
6. Record the actual value in the report (on
page 38).
3. Record the actual value in the report (on
page 38).
4. Close the gas shut-off valve.
5. Remove the pressure tester and close test connec-
tor .
A