Checking The Gas Type - Viessmann MatriX Service Instructions Manual

Initial start−up, inspection and maintenance
Further details regarding the individual steps
Starting the system
Boiler control unit
service instructions
1. Check the system pressure.
2. Open the gas shut−off valve.
3. Switch ON the mains isolator
(outside of the boiler room).
4. Switch the system ON/OFF
switch B on the control unit ON.
If the fault indicator lamp A on
the control unit illuminates and
the gas burner control unit
display C flashes, initially press
the reset button D on the gas
burner control unit.

Checking the gas type

1. Determine the gas type and
Wobbe index (Wo) from your gas
supplier.
H With natural gas setting E,
the boiler can be operated
in the Wobbe index range
12.0 to 16.1 kWh/m
(43.2 to 58.0 MJ/m
H With natural gas setting LL,
the boiler can be operated
in the Wobbe index range
10.0 to 13.1 kWh/m
(36.0 to 47.2 MJ/m
6
(cont.)
3
3
).
3
3
).
(cont.)
Note
During the initial start−up the
system can enter a fault state, if it
has insufficient gas in the supply
line (fault indicator on the control
unit illuminates).
Ventilate the gas supply line again
and reset the gas burner control
unit.
5. Match the coding on the boiler
control unit according to the table
on page 47.
Control unit installation
and service instructions
2. The burner is set up in the factory
for natural gas E. If necessary,
convert the burner in accordance
with details provided by your gas
supplier to a different gas type
(see page 7).
3. Record the gas type in the service
report (on page 49).