6
Placing the heating system in operation
Logano G234X – 6 720 804 886 (2012/08) 21
Checking flame sensor
19. Test the safety switch by closing the gas shut-off. The main burner
flame ( Fig. 25) and the ignition flame ( Fig. 24) are
extinguished. After six (6) seconds at the most the main gas solenoid
valve on the gas valve must close with an audible noise.
20. After 90 seconds the ignition module must switch to lock status and
stop generating sparks.
21. Shut off the heating system from the power supply. Open the gas
shut-off valve. Switch on unit power supply.
A normal operating cycle must follow. If the gas shut-off operates
correctly, proceed to step 25.
22. If the gas shut-off does not operate correctly, switch ON/OFF switch
on the gas shut-off valve [1] clockwise to the OFF position
immediately. Close the gas shut-off valve. Disconnect heating system
from the power supply and inform the customer service technician or
LP gas company.
23. Turn the gas valve ON/OFF button [1] clockwise to the OFF position.
24. Close the gas shut-off valve.
25. Disconnect heating system from the power supply and set the
thermostat to the lowest setting.
26. Remove pressure measuring nipple and pressure gauge for
measuring gas supply pressure and nozzle pressure from the gas
valve. Close the openings with the screw plugs [2] and [3] again.
27. Repeat steps 1 to 10 (depending on the control unit used) and step
20.
Thus the heating system is started up again.
Check the screw plugs [2] and [3] for leaks with soap solution.
If no leaks are found, continue with step 31.
28. If leaks are found, close gas shut-off and switch ON/OFF button on
gas valve [1] clockwise to the OFF position. Shut off the heating
system from the power supply.
Seal the leaks. Open the gas shut-off valve and repeat step 23.
Fig. 26 Gas valve
[1] ON/OFF button (at ON position)
[2] Screw plug for gas connection pressure test port
[3] Screw plug for nozzle pressure test port
29. To avoid corrosion, carefully wipe off the soap solution afterwards.
Checking AquaSmart
TM
30. Check the function of the maximum AquaSmart
TM
to make sure that
it switches the boiler off as soon as the boiler water temperature set at
the AquaSmart
TM
is reached. Record the result in the start-up
protocol ( page 22).
–Set AquaSmart
TM
to its desired setting.
– Replace front door and close.
Fig. 27 Checking temperature control
[1] Adjustment keypad
6.6 Shutting off gas supply to boiler
▶ Set thermostat to the lowest value.
▶ Disconnect the heating system from the power supply before carrying
out maintenance work.
▶ Turn the gas valve ON/OFF button [1] clockwise to the OFF position.
Do not use force.
Fig. 28 Gas valve
[1] ON/OFF button (at OFF position)
▶ Hang front panel of boiler [3] from above, fold down and screw in
securing screws [1] into the front cover below.
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