7 Cleaning and servicing the heating system – Procedure
152
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
2.
Allow the fire in the heating system to burn out and cool down.
3.
Remove the upper cladding (1) by lifting it upward.
4.
Loosen the M10 union nut (17 mm spanner) and pull the flue gas
temperature sensor (2) out of the clamp screw connections.
5.
Clean the sensor surface with a moist cloth.
6.
Reinstall the flue gas temperature sensor (2) in the reverse se-
quence.
7.
Mount the upper cladding (1).
8.
Deactivate the maintenance function.
✎
See section “Maintenance function” in this chapter.
✓
The cleaning of the flue gas temperature sensor is completed.
C
LEANING
THE
FLUE
GAS
PIPE
1.
Activate the maintenance function.
✎
See section “Maintenance function” in this chapter.
2.
Allow the fire in the heating system to burn out and cool down.
Figure 7/21 - Cleaning the flue gas temperature sensor
1
2
Important!
✎
Observe the “Generally applicable safety instructions” in this
section.
Summary of Contents for M299
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