Unit installation

9
9. Check all gaskets and plugs, and
retighten if necessary.
Note
We recommend you check all con-
nections on the heating water side for
leaks after approx. 500 hours run
(see page 22).
10. Check the boiler door and cleaning
cover a few days after commission-
ing and retighten all screws.
Danger
For safe operation, a minimum
operating pressure of 0.5 bar is
essential.
For this, a minimum pressure
switch can be used.
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
boiler can be operated in the
Wobbe index range 12.0 to
16.1 kWh/m
3
(43.2 to 58.0 MJ/m
3
).
■ With the natural gas LL setting, the
boiler can be operated in the
Wobbe index range 10.0 to
13.1 kWh/m
3
(36.0 to 47.2 MJ/m
3
).
2. In the delivered condition, the burner
is set up for natural gas E. If required,
convert the burner to a different gas
type in accordance with details provi-
ded by your gas supply utility (see
page 9).
3. Record the gas type in the service
report (on page 61).
Converting to natural gas LL
(not in a and c)
Conversion for 87 kW
01. Close the gas shut-off valve.
02. Switch OFF the system ON/OFF
switch at the control unit.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 907 GB