Lennox Baltic BCK 020, Руководство по установке, эксплуатации и техническому обслуживанию

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Page 50 - IOM / ROOFTOP BALTIC Series - 0
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03 - E
HEATING: gas burner
GAS BURNER TROUBLESHOUTING
If faults reported on CLIMATIC
-Reset the CLIMATIC.
-Check voltage: 230V after circuit breaker.
-Check GAS isolation shut-off valves are open.
-Check GAS pressure at the inlet of the GAS valves. It must be >20 mbar when the Burners shut down.
-Adjust the set points to priorities the burner. Increase the value of the room temperature set point to a temperature higher
than actual room temperature.
STAGE NORMAL POSSIBLE ACTION POSSIBLE
OPERATION FAULT SOLUTION
Heating Contactors Contactors do + Check "Safety Thermostats" In the air flow Replace
Requested engaged not engage before the gas heat exchanger. component
+ Check the free movement of the fan wheel
+ Check the supply temperature limitation thermostats
+ Replace thermostat
Contactors Extraction Fans + Check gas low pressure switch + Open gas supply
are are Nothing + Check electrical connection on the gas + Replace connection
engaged running happens Ignition Control Block and on board if necessary
connection board
+ Check the fan voltage supply voltage
+ Check the fire-up electrode
+ Re-position the pressure
After 30 to 45 Continuous + Check the pressure drop at the pressure switch tube
Extraction seconds : ventilation switch : It must be higher than 165 Pa + Change the pressure
fan is pre-ventilation the happens + Check the good operation of the pressure switch
ON fire-up electrode without sparks switch using an Ohmmeter and by artificially + Reset or replace the
should spark from fire-up creating a depression in the tube. Thermostat
electrode + Check the operation the Backfire thermostat.
+ Remove the air from the
Continuous After a few After 4 seconds + Check injection pressure during start-up gas pipe-work
ventilation seconds the the GAS burner (value for High Heat) + Adjust the injection
and sparks gas burner still not operating + Check the supply voltage to the ignition pressure to high heat value.
from fire up fires-up and safety shutdown control box (continuous voltage) + Change the control box
electrode by the ignition + Remove the control box from the gas block. if the gas valve is OK.
Control Block. + Change the gas valve.
Within 4 seconds + Check that the High / Low control is
the GAS burner connected (for valve VK 4125 P). + Check the whole
fires-up BUT + Check the position and connections of the electrical supply.
safety shutdown Ionisation Probe. It must not be Earthed (230 V) + Adjust the supply and
from the ignition + Check the Polarity of the 230 V connection injection pressure if gas is
Control Block. on the gas burner transformer. different from natural
+ Measure the Ionisation Current : It must be gas G20 : ( G25 gas of
higher than 1,5 microAmps. Groningue for example).
+ Check the type of gas.
Table 6