7 Cleaning and servicing the heating system – Requirements
97
1.
Switch the heating system off.
✎
See the “HDG Control” operating manual, chapter “5 Using the
control unit”, section “5.3 Switching off the heating system”.
2.
Allow the fire to burn out and cool down.
3.
Turn the main switch off.
4.
Remove the middle (2) or lower (4) rear cladding from the boiler.
5.
Pull the ignition fan (1 or 3) out of the retainer.
6.
Unscrew the four M4 stainless steel slotted screws (4) of the hot air
nozzle (5).
7.
Pull off the hot air nozzle (5).
8.
Remove the insulating tube (6) and the seal (3).
9.
Pull the heating element (2) out of the plug contacts (7).
10.
Check the heating element (2) for dirt.
11.
Remove any dirt by blowing it off.
12.
Check the photocell (1) for dirt.
13.
Remove any dirt using a cotton swab.
14.
Reinstall the ignition fan into the heating system in the reverse se-
quence.
15.
Re-starting the heating system.
Figure 7/18 - Dismantling the ignition fan
3
4
HDG Compact 25/35
HDG Compact 45/50/65/80
2
1
Figure 7/19 - Checking and cleaning the ignition fan
1
6
5
4
3
2
7