Carrying Out A Leak Test In Operating Conditions; Measuring The Carbon Monoxide Content (Co); Function Testing - Buderus logamax plus gb142-24 Installation Manual

9 Start-up procedure
9.9 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.
9.10 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.

9.11 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.
Buderus • http://www.buderus.net
36
Fig. 38 Flue gas sampling point
We reserve the right to make any changes due to technical modifications!
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007