Inspection; Preparing The Boiler For Inspection; Visual Inspection For General Signs Of Corrosion; Internal Leak Testing - Buderus Logamax plus GB142-24 Installation Instructions Manual

11

Inspection

We advise you to offer your customer an annual inspection and
maintenance contract (for the contents of this contract,  page 35 and
page 35).
If inspection reveals that maintenance work is necessary you can carry
this out as required ( chapter 12 "Maintenance", page 29).
CAUTION:
▶ Check and clean the heating system once a year.
▶ Carry out a maintenance overhaul if necessary.
Immediately repair defects to avoid damage to the
heating system!
WARNING:
Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect
the boiler and to replace any part of the control system
and any gas control which has been under water.
CAUTION: Risk of electric shock.
▶ Before opening the system: disconnect the heating
system from the power supply using the heating
system emergency OFF button or disconnect the
relevant circuit breaker of the house from the power
grid.
▶ Secure the heating system against accidental
restarting.
▶ Periodically examine the venting systems and cleaning of the screens
in the vent terminal.
▶ Also periodically inspect the low water cutoffs, including flushing of
float types and clean the condensate collections and disposal
system.
11.1

Preparing the boiler for inspection

▶ Switch off the heating system using the main switch
▶ Remove the cover from the boiler ( fig. 7, page 9).
INSTRUCTION FOR THE INSTALLER
▶ If gas pipes have to be disconnected from the gas
burner fitting, the burner cover must only be opened
by a specialized professional.
11.2

Visual inspection for general signs of corrosion

▶ Check all gas and water pipes for signs of corrosion.
▶ Replace any pipes that are corroded.
11.3

Internal leak testing

▶ Switch off the heating system using the main switch
▶ Test for internal leaks of the gas burner fitting on the inlet side,
applying a test pressure of 7.0 inch W.C. (17.4 mbar) in case of
natural gas and 11.0 mbar (27.4 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 all gaskets and
joints upstream of the gas burner fitting for leaks 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.
11.4

Measuring the ionization current

See section 8.12"Measuring the ionization current" page 24.
11.5

Measuring the inlet gas pressure

See section 8.7"Inlet gas pressure", page 23.
Logamax plus GB142-24/30/45/60 – 6720820104 (2017/05)
11.6
See section 8.8"Checking and adjusting the gas/air ratio", page 23.
11.7
See section 8.9"Carrying out a leak test in operating conditions",
page 24.
11.8
See section 8.10"Measuring the carbon monoxide content (CO)",
page 24.
11.9
See chapter 8"Start-up procedure", page 21.
11.10 Checking the functioning and the safety of the air
See section 8.5"Checking the combustion air/flue gas connection",
page 22.

11.11 Checking venting systems

Check air intake and flue gas for obstruction or damage.
12
▶ Switch off the heating system using the main switch
▶ Close the gas shut-off valve.
▶ Remove the casing.
12.1
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▶ Dismantle the hot surface ignitor and the ionization electrode.
▶ Loosen the fastening nuts ( fig 45, [1]).
▶ Remove the earth cable ( fig 45, [2]).
▶ Remove the retaining plate.
▶ Pull the hot surface ignitor ( fig 45, [3]) and the ionization
electrode ( fig 45, [4]) out of the heat exchanger.
b
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Fig. 45 Removing the hot surface ignitor and the ionization electrode
[1] Fastening nut
[2] Earth cable
[3] Hot surface ignitor
[4] Ionization electrode

Checking and adjusting the gas/air ratio

Carrying out a gas leak test in operating conditions

Measuring the carbon monoxide content (CO)

Carrying out a pressure test of the heating system

intake and flue gas conduit

Maintenance

CAUTION:
There is no need to lubricate the combustion motor as it
is permanently lubricated.
Cleaning the heat exchanger, burner and condensate
trap
CAUTION:
To avoid a short circuit.
▶ Do not spray the cleaning agent onto the burner, the
hot surface ignitor, the ionization electrode or other
electric components.
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Inspection
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