7 Cleaning and servicing the heating system – Procedure
148
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
C
HECKING
DRIVE
CHAIN
OF
THE
HDG
FEEDING
SYSTEM
TBZ150
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.
3.
Release the screws (2) (10 mm spanner) of the cover (3) on the
feeding system and remove them.
4.
Check the chain tension (1).
✓
If the drive chain has approximately 1 cm play, the tension is
correct.
✓
If the drive chain has more play, it must be tightened.
5.
Loosen the locking screw on the chain tensioner (4).
✓
The chain tensioner can be moved.
6.
Move the chain tensioner (4) to the side until the drive chain has
sufficient tension again.
7.
Secure the chain tensioner (4) in this position.
✓
The drive chain is tightened.
8.
Replace the cover (3) on the feeding system.
9.
Deactivate the maintenance function.
✎
See section “Maintenance function” in this chapter.
✓
The check of the drive chain of the feeding system is completed.
Warning!
Risk of injury from automatically driven components
If the heating system is switched on, the gears and drive chains may
start unexpectedly. Body parts could be crushed during cleaning
and servicing work.
Turn off the main switch and secure it against being turned back on
before you check the drive chains.
Figure 7/17 - Checking the feeding system drive chain
4
3
2
1
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