Carrying Out A Tightness Test In Operating Conditions - Buderus GB142-24 Instruction

3
LP conversion
Fig. 8 Checking the gas/air ratio
B Switch on a the heating system using the main
switch.
B Press the "Chimney Sweep" d button and hold it (for
approx. two seconds) until the display shows the
decimal point.
B Press and hold the "Chimney Sweep" and "Service"
d + e buttons (for approx. five seconds) until the
display shows "Lxx" (e. g. L80).
B Set the boiler to partial load "L30" by pressing the
"Chimney Sweep" d button (higher values) or the
"Reset" c button (lower values).
d = higher values, c = lower values
B Read out the differential pressure. The differential
pressure (p – p ) must be -0.02 inch W.C. (-
Gas Air
5 Pa) (± 0.02 inch W.C. = ± 5 Pa) (read-out on
pressure gauge: -0.04 – 0 inch W.C. = -10 - 0 Pa).
B Enter the value measured in the start-up report.
B If the gas/air ratio is not correct it can be adjusted using
the adjustment screw (
screw is located behind the cover screw.
Fig. 9 Setting the gas/air ratio
8
1
2
72150100-007.1TD
fig. 9, [2]). The adjustment
1
72150100-008.1TD
B Repeatedly press the "Service" e button until the
temperature indication is displayed.
B Press the "Chimney Sweep" d button until the
decimal point is cleared from the display.
B Switch off b 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 a 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.
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.
Logamax plus GB142-24/30/45/60 – 7215 0100 (2011/11)