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Open the boiler door:
– Turn the vent key through a quarter rotation to undo the
boiler door lock (fig. 76, see detailed picture).
– Push the fastener down (fig. 76) and open the boiler
door.
NOTICE
If the boiler door cannot be opened completely,
remove it (see paragraph 12.2: "Remove the
boiler door" on page 65).
11.2 Carry out a visual check for general
signs of corrosion
Check all gas and water-bearing pipes for signs of
corrosion and for leaks.
Replace any pipes that are corroded.
Carry out a visual inspection of the burner, heat
exchanger, condensate trap, automatic air vent and all
fittings in the boiler.
11.3 Gas valve leakage test
Check the internal tightness of the gas fitting on the input
side (with the boiler switched OFF) at a test pressure of
7.0 inch W.C. (17.4 mbar) for natural gas and 8.0 inch W.C.
(19.9 mbar) for LPG.
Check that the heating system is switched OFF.
Open the screw plug on the testing nipple for the gas
connection by 2 turns.
Connect the pressure gauge tube to the testing nipple.
The pressure drop allowed after one minute is max.
3.8 inch W.C. (10 mbar).
If the pressure drop is higher, check all sealing locations
of the gas fitting for leaks using a foaming product.
Repeat the pressure test if no leaks are found. Replace
the gas fitting if the pressure drop is higher than
3.8 inch W.C. (10 mbar) per minute again (see
paragraph 12.3.1: "Remove the gas valve" on page 66
for instructions on how to remove).
11.4 Measure the ionization current
See paragraph 9.12: "Measure the ionization current" on
page 56.
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
3
4
Fig. 76 Opening the boiler door
Fig. 77 Checking the gas fitting for internal tightness
Inspection
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