Carrying Out A Leak Test In Operating Conditions; Measuring The Carbon Monoxide Content (Co); Function Testing - Buderus Logamax Plus GB142-24 Installation Instructions Manual

8 Start-up procedure
8.9 Carrying out a leak test in operating
conditions
 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 flam-
mable gas explodes.
– Only use approved leak detection agents for
leak detection such as a soapy water
solution.
CAUTION
due to a short circuit.
– Cover damageable parts before leak testing.
– Do not spray the leak testing agent onto
cables, plugs or electrical connection lines.
Do not allow it to drip onto them either.
8.10 Measuring the carbon monoxide content
(CO)
 Measure the carbon monoxide content on the flue gas
sampling point (fig. 38).
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 adjust-
ment may be wrong, the gas burner fitting or the heat
exchanger are dirty or that there may be burner faults.
 You must establish and resolve the cause. The boiler
must be operational when you do this.

8.11 Function testing

 You must check the functioning and, if readjustment is
possible, the adjustment of all control, regulating and
safety devices when carrying out start-up tests, annual
inspections or maintenance as required.
 You must also test the gas and water lines for leaks.
36 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Fig. 38 Flue gas sampling point