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9
Start-up procedure
NOTICE
Check the gas supply pipe or contact the rele-
vant gas utility company if the required supply
pressure is not available.
If the supply pressure is too high, a gas pres-
sure regulator must be integrated upstream of
the gas fitting. Contact the gas utility
company.
Close the gas valve.
Remove the gauge-connection tube and tighten the
screw plug on the testing nipple again.
Open the gas valve again by pushing on the gas valve
and turning it ¼ rotation in a counterclockwise direction.
9.8
Check and adjust the gas/air ratio
WARNING
Damage to the boiler by incorrect adjustment of
the gas/air ratio.
Adjust gas/air ratio ONLY with part load!
Adjust gas/air ratio ONLY based on the gas/
air pressure differential and never based on
measured flue gas values such as CO/CO
NO
!
X
Open at least two thermostatic radiator valves, if present.
Do not switch ON the boiler.
Push on the control panel to open it.
Switch OFF the heating system by pressing the main
switch of the BC10 basic controller (fig. 59, pos. 1).
Close the gas valve (fig. 56).
Turn the vent key through a quarter rotation to undo the
boiler door lock (fig. 47, see detailed picture).
Push the fastener down (fig. 47) and open the boiler
door.
Open the screw plug on the testing nipple for the burner
pressure by 2 turns (fig. 60, pos. 1).
Set the pressure gauge to "0".
NOTICE
Throughout the measuring operation, keep the
digital pressure gauge in the same position
(horizontal or vertical) in which it was reset
to "0".
Use a connection tube to connect the positive port of the
pressure gauge to the testing nipple for burner pressure
(fig. 60, pos. 2).
52
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
110
100
90
/
2
11
1
Fig. 59 BC10 basic controller
Fig. 60 Checking the gas/air ratio
10
9
110
120
90
888
130
140
1
2
3
4
5
2
8
130
150
170
190
7
6
1
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