Commissioning The System; Checking The Gas Type - Viessmann MatriX Service Instructions For Contractors

Commissioning the system

Danger
CO build-up as a result of incorrect burner
adjustment can have serious health implications.
Always carry out a CO test before and after
work on gas appliances.
A
B
C
D
Fig. 1

Checking the gas type

1. Check the gas type and Wobbe index (Wo) with
your gas supply utility.
■ With the natural gas E setting, the boiler can be
operated in the Wobbe index range 12.0 to
16.1 kWh/m 3 (43.2 to 58.0 MJ/m
■ With the natural gas LL setting, boilers can be
operated in the Wobbe index range 10.0 to
13.1 kWh/m 3 (36.0 to 47.2 MJ/m
).
c
Note
Checking the burner setting with the boiler heated to
operating temperature (min. 40 °C) is essential.
Also carry out tests at base load.
1. Check the heating system pressure.
2. Open the gas shut-off valve.
3. Switch ON the mains isolator (outside the installa-
tion room).
4. Switch ON system ON/OFF switch
unit.
If fault indicator
and display
first reset the system. To do this, press reset button
D
Note
The appliance can enter a fault state during com-
missioning if there is insufficient gas in the gas line:
The fault indicator on the control unit illuminates.
Purge the gas line again and reset the burner con-
trol unit.
5. Adjust the codes on the boiler control unit in
accordance with the table on page 19.
2. In the delivered condition, the burner is set up for
natural gas E. If required, convert the burner to a
different gas type (see page 8) in accordance
with the details provided by your gas supply utility.
3 ).
3. Record the gas type in the report (on page 39).
3 ) (not in or
a
Commissioning, inspection, maintenance
Boiler control unit service instructions
on the control unit illuminates
A
on the burner control unit flashes,
C
on the burner control unit.
Control unit installation and service instruc-
tions
B at the control
7