9
Heating system inspection
Logano plus GB312 – 6 720 806 273 (2013/01)
43
▶ Turn the knob
counter-clockwise to select
diagnosis
(indicated by
).
▶ Press the
button to open the
SERVICE / DIAGNOSIS
menu.
▶ Turn the knob
counter-clockwise to select
monitor reading
(indicated by
).
▶ Press the
button to open the
DIAGNOSIS / MONITOR
READING
menu.
▶ Turn the knob
counter-clockwise to select
Boiler / Burner
(indicated by
).
▶ 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.
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.
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
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
SERVICE MENU
quick operation
settings
diagnosis
servicing
SERVICE|DIAGNOSIS
function test
monitor reading
diagnosis
servicing
B
DIAGNOSIS|MON.READING
Boiler/Burner
domestic hot water
heating circuit 1
bus users
B
7 747 010 720-69.2RS
1
2
7 747 010 720-26.1RS
1 2 3
