37
GB
1
2
Check functionality of
safety devices
All safety devices have to be checked
on good functioning. Safety devices
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temperature sensor, water return
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-
rature sensor and ionisation electro-
de. These devices can be checked as
described below.
Flow temperature sensor
(1)
Disconnect the plug from the sensor
while the boiler is switched on. This
should result in a lockout no. 20.
The lockout should disappear as
soon as the plug is placed back in po-
sition, the boiler will restart.
Return temperature sensor
(2)
Disconnect the plug from the sensor
while the boiler is switched on. This
should result in a lockout no. 40.
The lockout should disappear as
soon as the plug is placed back in po-
sition, the boiler will restart.
Flue gas temperature sensor
(3)
Disconnect the plug from the sensor
while the boiler is switched on. This
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The lockout should disappear as
soon as the plug is placed back in po-
sition, the boiler will restart.
Ionisation electrode
(4)
Remove electrical connection from
the ionisation electrode while the
boiler is running, the boiler will go
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to restart. With the electrical con-
nection removed, the restart will re-
sult in lockout no. 133. When the
connection is already mounted, the
restart will be successful. Measu-
ring the ionisation current can be
done by mounting a multi-meter (set
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electrode and its electrical connec-
tion. The ionisation current should
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Gas tightness check
Check the gas tightness of all sealed
connections with an approved soap
or electronic gas analyzer, for
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Test points;
t
Bolt connections;
t
Gaskets of mixing system, etc.
Boiler shut down
When the boiler will not be used for
longer periods, shut it down accor-
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t
Switch the boiler in stand-by
operation
;
t
Switch off the boiler with the on/
off switch (A);
t
Disable power supply to the boi-
ler by deactivating the mains iso-
lator switch in the boiler room;
t
Close the gas supply to the boiler.
4
Commissioning
Check safety devices
Boiler shut down
3
