Buderus Logano GE434 Maintenance Instructions Manual page 31

Heating system start-up
Checking the flue gas damper (accessory)
PLEASE NOTE
Please note that, during heat demand, the
flue gas damper must be in the "OPEN"
position.
! Check the position of the flue gas damper on the
setting of the actuator lever (Fig. 13).
! The gas burner must only start after the terminal
position "OPEN" (Fig. 13, Item 1) has been reached.
Checking the flue gas monitor
! Start-up the heating system.
! Unscrew the flue gas temperature sensor (Fig. 14,
Item 1, in total two flue gas temperature sensors, i.e.
one per burner) from the draught hood (Fig. 14,
Item 2) .
! With control system 4000, press the "Flue gas test
button" and hold down for approx. 1 second. When
operating at a constant boiler temperature, set the
boiler water thermostat to maximum.
! Hold the tip of the flue gas temperature sensor
(Fig. 14, Item 1) into the core of the flue gas flow,
whilst the burner is operating.
The gas supply will be interrupted for a max. of
120 seconds, and the burner will be switched OFF.
The burner is automatically restarted 20 minutes
later, if heat is called for.
! Refit the flue gas temperature sensor (Fig. 14,
Item 1).
! For control system 4000, press the "Flue gas test"
button once to reset the system.
Also carry out the respective steps with the second flue
gas temperature sensor.
We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
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Fig. 13 Flue gas damper position
Item 1: Position "OPEN"
Item 2: Position "CLOSED"
Fig. 14 Checking the flue gas temperature sensor
Item 1: Flue gas temperature sensor
Item 2: Draught hood
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
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