Checking The Gas Type; Conversion To Natural Gas Ll - Viessmann MatriX Service Instructions Manual

Further details regarding the individual steps

Checking the gas type

1. Determine the gas type and Wobbe
index (Wo) from your gas supply util-
ity.
■ With the natural gas E setting, the
boilers can be operated in the
Wobbe index range 12.0 to
3
16.1 kWh/m (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
(not in a and c).

Conversion to natural gas LL

(not in a and c)
A
B
C
Commissioning, inspection, maintenance
2. In the delivered condition, the burner
is set up for natural gas E. If required,
convert the burner to the other gas
type in accordance with details provi-
ded by your gas supply utility (see
page 7).
3
).
3. Record the gas type in the report (on
page 45).
3
)
01. Close the gas shut-off valve.
02. Switch OFF the control unit ON/OFF
switch.
03. Switch OFF the main isolator (out-
side the installation room) or the
power supply and prevent unauthor-
ised reconnection.
04. Release the cable fixings on the gas
pipe.
05. Release compression fittings A
and C remove the gas pipe.
06. Unscrew gas restrictor B.
07. Take gas restrictor B for natural
gas LL from the pack supplied and
screw on (for diameter see table on
page 46).
(cont.)
7