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CAST IRON FLOOR STANDING GAS BOILER
FAILURE STATES OF OPERATION
When these occur, the gas supply into the main burner and ignition burner is automatically closed:
ywhen the thermo-couple (ionisation electrode) is cooled because of: gas supply breakdown,
clogging by dirts, the flame extinguished by condensate, wrong setting of the thermo-couple
with reference to the ignition burner,
ywhen there is breakdown in the circuit of the boiler thermostat, the water in the boiler body gets
overheated.
The boiler operation cannot be started automatically in such cases. It is not possible to start the
boiler again without the professional service action to remove the problem.
What to do in the case of failure:
No. Failure
Possible cause
Removing Removed by
1. Water leakage from
unsealed areas
a1) released joint
a2) damaged sealing
element
a3) damaged cast iron
a1) tight the joint
a2) replace the element
a3) replace the cast iron
a1) service
a2) service
a3) service
2. Gas discharge from
unsealed areas
a) close the gas supply
b) find the place of leakage
and remove the failure
a) customer
b) service
3. The ignition burner is
not burning properly or
went off after start
a) low gas pressure a1) set up the flame by a
screw
a2) set up the gas pressure
a3) deaerate
a1) service
a2) service
a3) service
4. Boiler has a low output a) low gas pressure
b) unsuitable main jets
a) set up the gas pressure a) service
5. Ignition burner goes off
after igniting repeatedly
a) faulty emergency
thermostat
b) faulty thermocouple
c) faulty gas inlet valve
a) replace the thermostat
b) replace the
thermocouple
c) replace the valve
a) service
b) service
c) service
6. Hot water does not flow
into the heating system
a) same as by 5
b) boiler aerated, low water
pressure
c) faulty reversevalve or
pump
d) damaged thermostat
a) same as by 5
b) deaerate, fill in with
water
c) replace damaged parts
d) replace thermostat
a) same as by 5
b) customer
c) service
d) service
7. Main burners are not
ignited after switching
the thermostat
a) faulty gas valve
b) reset on the flue gas
thermostat activated
a) change the valve
b) check the flue, press
reset on the flue gas
thermostat
a) service
b) service
13


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