Internal Tightness Testing; Measuring The Ionization Current; Measuring The Inlet Gas Pressure; Checking And Adjusting The Gas/Air Ratio - Buderus Logamax plus GB142-24 Installation And Servicing Instructions

Inspection

12.3 Internal tightness testing

Switch off the heating system using the main switch.
Test the internal tightness of the gas burner fitting on
the inlet side, applying a test pressure of 7.7 inch
W.C. (20 mbar) in case of natural gas and 19.2 inch
W.C. (50 mbar) in case of LPG.
After one minute the pressure must not have dropped by
more than 3.8 inch W.C. (10 mbar).
If the pressure has dropped more, you must check
the tightness of all gaskets and joints upstream of the
gas burner fitting using a foaming agent. Repeat the
pressure test if no leaks are found. If the pressure
has again dropped by more than 3.8 inch W.C.
(10 mbar) per minute you will have to replace the gas
burner fitting.

12.4 Measuring the ionization current

See subsection 9.12 "Measuring the ionization current",
page 33

12.5 Measuring the inlet gas pressure

See subsection 9.7 "Inlet gas pressure", page 30
12.6 Checking and adjusting the gas/air
ratio
See subsection 9.8 "Checking and adjusting the gas/air
ratio", page 31
12.7 Carrying out a gas tightness test in
operating conditions
See subsection 9.9 "Carrying out a tightness test in
operating conditions", page 33
12.8 Measuring the carbon monoxide
content (CO)
See subsection 9.10 "Measuring the carbon monoxide
content (CO)", page 33
12.9 Carrying out a pressure test of the
heating system
See chapter 9 "Start-up procedure", page 27.
12.10 Checking the functioning and the
safety of the air intake and flue gas
conduit
See subsection 9.5 "Checking the combustion air/flue
gas connection", page 30.

12.11 Checking venting systems

Check air intake and flue gas for obstruction or damage.
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
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