Cleaning The Burner And Heat Exchanger - Buderus LOGANO PLUS GB312 Installation Instructions Manual

▶ Press the button to open the DIAGNOSIS/MONITOR READING
menu.
▶ Turn the rotary selector
Burner (indicated by ).
DIAGNOSIS|MON.READING
B
Boiler/Burner
domestic hot water
heating circuit 1
bus users
Fig. 59
▶ Press the button to open the BOILER/BURNER menu.
The monitor readings are displayed as a list, i.e. turning the selector
scrolls down to more readings.
▶ 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 using either the dry or wet
method.
▶ Remove differential pressure tester from burner pressure testing
nipple and pressure testing point on flue socket
▶ Seal the testing point on the flue pipe.
▶ Remove the pressure testing nipple from the burner and carefully
refit, seal and tighten the blanking plug.
Boiler Differential pressure in inches W.C. (Pa)
capacity
90-4
120-4
160-5
200-6
240-7
280-8
Table 18 Cleaning threshold – differential pressure
Logano plus GB312 – 6 720 647 367 (2012/11)
counter-clockwise to select Boiler/
1.45 (360)
1.85 (460)
2.21 (550)
2.13 (530)
2.17 (540)
2.25 (560)
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. 60 Removing the trap
[1] Siphon
[2] Condensate pan
Burner herausnehmen
▶ Disconnect all electrical connectors on the burner.
Fig. 61 Disconnecting electrical connectors on the burner
[1] Ignitor Cable
[2] Monitor lead
[3] Ignitor Cable
▶ 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.
9
7 747 010 720-69.2RS
1
1 2 3
7 747 010 720-26.1RS
43