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Start-up procedure 9
33
We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
9.9 Carrying out a tightness test in
operating conditions
z Check the tightness of all gaskets and joints in the
burner gas circuit while the burner is operational,
using a foaming agent.
9.10 Measuring the carbon monoxide
content (CO)
z Measure the carbon monoxide content on the flue
gas sampling point (fig. 32).
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.
z You must establish and resolve the cause. The appli-
ance must be operational when you do this.
9.11 Function testing
z 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.
z You must also test the gas and water tightness.
9.12 Measuring the ionization current
z Switch off the heating system using the main switch.
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.
Fig. 32 Flue gas sampling point
33


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