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.
Carry out a CO test before and after work on
gas appliances.
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 boilers 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, the boilers can
■
be operated in the Wobbe index range 10.0 to
3
13.1 kWh/m (36.0 to 47.2 MJ/m
).
c
A B
3 ).
3
) (not in
a
Commissioning, inspection, maintenance
Note
It is essential to check the burner settings with the
boiler heated to operating temperature (min. 40 °C).
Also check in the partial load range.
Boiler control unit service instructions
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. Remove the burner hood.
5. Turn ON the system ON/OFF switch
trol unit.
If fault indicator
and display C
first reset the system. To do this, press reset button
on the burner control unit.
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. Reset the burner control
unit.
6. Adjust the codes on the boiler control unit in
accordance with the table on page 18.
Control unit installation and service instruc-
tions
2. In the delivered condition, the burner is set up for
natural gas E. If necessary, convert the burner to
the other gas type (see page 8) in accordance
with the details provided by the gas supply utility.
3. Record the gas type in the report (on page 38).
or
at the con-
B
on the control unit illuminates
A
on the burner control unit flashes,
7