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Checking the sensor well and all connections on...
Check the connection for the sensor well and the mini-
mum pressure switch (low water indicator) for tight-
ness.
Checking high limit safety cut-out settings
The high limit safety cut-out must not be set higher
than 110 °C. If necessary, set to max. 110 °C.
Checking the gas type
1. Check with your gas supply utility regarding the
gas type and Wobbe index W
1013.25 mbar).
The boiler can be operated in the following Wobbe
index ranges:
■
With natural gas E:
Wobbe index range 12.0 to 16.1 kWh/m
58.0 MJ/m
3
)
With natural gas LL:
■
Wobbe index range 10.0 to 13.1 kWh/m
3
47.2 MJ/m
)
Setting the gas type
In the delivered condition, the boiler is preset for natu-
ral gas E and can be changed over to natural gas LL.
The setting can later be changed back to natural
gas E.
Commissioning the system
■
Operating instructions and service instructions
for the Vitotronic control unit
"MatriX-Disk burner" service instructions
■
■
Neutralising system operating instructions
■
Flue system installation instructions
2. In the delivered condition, the burner is set up for
(0 °C;
s
3. Record the gas type in the report on page 26.
3
(43.2 to
3
(36.0 to
Commissioning, inspection, maintenance
(cont.)
Installation and service instructions for the Vito-
tronic control unit
natural gas E. If required, change the gas type set-
ting to natural gas LL: See chapter "Setting the gas
type", page 11. 13
"MatriX-Disk burner" service instructions
Danger
CO build-up as a result of incorrect burner
adjustment or flue gas system leakage can have
serious health implications.
Always carry out a CO test before and after
work on gas appliances.
13
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