Cleaning The Burner And Heat Exchanger - Buderus Logano plus GB312 Installation And Service Instructions Manual

▶ Turn the knob counter-clockwise to select diagnosis
(indicated by ).
SERVICE MENU
quick operation
settings
 diagnosis
servicing
▶ Press the button to open the SERVICE / DIAGNOSIS menu.
▶ Turn the knob counter-clockwise to select monitor reading
(indicated by ).
SERVICE|DIAGNOSIS
function test
B
monitor reading
diagnosis
servicing
▶ Press the button to open the DIAGNOSIS / MONITOR
READING menu.
▶ Turn the knob counter-clockwise to select Boiler / Burner
(indicated by ).
DIAGNOSIS|MON.READING
B
Boiler/Burner
domestic hot water
heating circuit 1
bus users
▶ Press the button to open the BOILER / BURNER menu.
The monitor readings are displayed as a list. Turning the knobs scrolls
down to display more readings as necessary.
▶ Press the button to increase the boiler output to a higher
percentage.
▶ Read off output on RC35.
▶ Wait until 100 % of the load is reached.
▶ Read off differential pressure from the tester and compare with the
levels shown in Table 15.
If the differential pressure measured is higher than the figure in the
table, the heat exchanger must be cleaned by means of either the dry
or wet method.
▶ Disconnect differential pressure tester from burner pressure test
port and pressure test point on the flue connection.
▶ Seal the test point on the vent pipe.
▶ Remove the pressure test port from the burner and carefully reinstall,
seal and tighten the threaded plug.
Boiler size Differential pressure in inches W.C. (Pa)
90-4 1.45 (360)
120-4 1.85 (460)
160-5 2.21 (550)
200-6 2.13 (530)
240-7 2.17 (540)
280-8 2.25 (560)
Table 19 Cleaning threshold – differential pressure
Logano plus GB312 – 6 720 806 273 (2013/01)
Heating system inspection
9.6.2

Cleaning the burner and heat exchanger

▶ Shut down the heating system ( Section 8, page 40).
▶ Turn off the main gas supply cock and secure to prevent it being
inadvertently turned on again.
▶ Allow boiler to cool.
▶ Remove the trap from condensate pan drain outlet.
▶ Place a bucket under the condensate pan outlet.
2
Fig. 56 Removing the trap
[1] Siphon (condensate trap)
[2] Condensate pan
Removing the burner
▶ Remove all electrical connectors from the burner.
▶ Unscrew the fixing nuts (3) from the top and bottom of the burner
shield.
▶ Bolts (2) on the side of the fan: Undo the two rear hex-head bolts by
two turns; remove the front two hex-head bolts.
Fig. 57 Unplug the electrical connectors from the burner.
[1] High-tension ignition lead
[2] Monitor lead
[3] High-tension ignition lead
9
7 747 010 720-69.2RS
1
1 2 3
7 747 010 720-26.1RS
43