Replacing The Ignition Unit; Measure The Ionization Current - Buderus Logamax plus GB162-80 kW Service Instructions Manual

7 Actions
section 103 Replacing the ignition unit
H
DANGER OF FATAL ACCIDENT
due to electric shock!
 Switch off the power supply to the heating system, see
section 72.
 Open the boiler door as instructed in section 73.
 Disconnect the plug of the glow ignitor as instructed in
section 101, [1] and or the plug of the ionization electrode as
instructed in section 104, [1].
Type A (old version)
 Loosen both nuts [1].
 Remove the retaining plate [2].
 Remove the complete ignition unit: glow ignitor, ionization
electrode, sight glass with rubber seal, ignition unit housing
and bolts.
fig. 5 Old version ignition unit
Type B (new version)
 Remove the complete ignition unit: ignition unit housing [1],
glow ignitor [2], ionization electrode [3], seal [4], rubber seal
with sight glass [5], bolts [6] and nuts [7].
7
1
fig. 6 New version ignition unit
A
DANGER OF FATAL ACCIDENT/FIRE
due to flue gas escaping or explosion of flamable gases.
All work on gas pipe work and fittings must be carried out
by authorized gas technicians.
76
2 1
3
4
5
2
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
A
DAMAGE TO THE INSTALLATION
due to incorrect glow ignitor assembly.
 The glow ignitor is highly breakable. Handle with care.
 Install the glow ignitor so that the lug of the heat
exchanger is located in the relevant opening in the glow
A
ignitor.
DAMAGE TO THE INSTALLATION
due to incorrect assembly.
 Check that both bolts of the rubber seal with sight glass
are tightened evenly.
 Install all new parts of tthe ignition unit (ignition unit housing
[1], glow ignitor [2], ionization electrode [3], seal [4], rubber
seal with sight glass [5], bolts [6] and nuts [7]).
 Attach the plug of the glow ignitor and the ionization electrode
in reverse order.
 Open the gas stop valve and put the boiler into chimney
sweep operation as instructed in section 81.
 Check all couplings and locations in the gas train, which have
been disconnected, for leaks. Use a foaming agent which has
been approved for gas leak testing.
 If a gas leak is found: switch off the power supply to the heat-
ing system, see section 72, close the gas stop valve as indi-
cated in section 74 and deal with the cause of the gas leak.
 Close the boiler door as instructed in section 77.
 Switch on the power supply to the heating system, see
section 79.
1
section 104 Measure the ionization current
 Switch off the power supply to the heating system, see
section 72.
 Open the boiler door as instructed in section 73.
6
 Disconnect the plug of the ionization electrode [1].