3
Gas valve replacement
Logamax plus GB162-80 kW/100 kW - We reserve the right to make any changes due to technical modifications!
9
B If the gas/air ratio is not correct it can be adjusted using
the adjustment screw (Æ fig. 16, [1]). The adjustment
screw is located behind the cover screw.
Fig. 16 Setting the gas/air ratio
B Repeatedly press the "Service" button until the
temperature indication is displayed.
B Press the "Chimney Sweep" button until the
decimal point is cleared from the display.
B Switch off the heating system using the main switch.
B Remove the measurement set-up, tighten the screw in
the burner pressure measuring nipple.
B Switch on the heating system using the main switch.
3.4 Carrying out a tightness test in
operating conditions
B Check all gaskets and joints in the burner gas circuit for
leaks while the burner is operational, using a foaming
agent.
3.5 Measuring the carbon monoxide
content (CO)
B Measure the carbon monoxide content on the flue gas
sampling point (Æ fig. 17, [1]).
The CO values in an air-free condition must be below
400 ppm or 0.04 vol. %.
Values of 400 ppm and up indicate that the burner
adjustment may be wrong, the gas burner fitting or the
heat exchanger are dirty or that there may be burner faults.
B You must establish and resolve the cause.
The boiler must be operational when you do this.
Fig. 17 Measuring the carbon monoxide content
DANGER:
Leaks may be caused to pipes and screw
connections during start-up activities if
flammable gas explodes.
B Only use approved leak detection agents
for leak detection such as a soapy water
solution.
CAUTION:
due to a short circuit.
B Cover damageable parts before leak
testing.
B Do not spray the leak testing agent onto
cables, plugs or electrical connection
lines. Do not allow it to drip onto them
either.
6720615033-020.1TD
1
6720615033-021.1TD
1
To Next Page
Loading...
