Technical data

Air Top 2000 ST Repair
907
9.2.7 Change glow plug
9.2.7.1 Removal
1. Remove the heater (see 8.7.1.1).
2. Remove the casing parts (see 9.2.1).
3. Remove the control unit (see 9.2.3.1).
4. Remove the combustion air fan (see 9.2.5.1).
5. Press the cable grommet (10, Fig. 904) out of
the heat exchanger (9) toward the inside.
6. Remove the four screws (2) and the air baffle (3).
NOTE
Check the burner insert (5) has detached from the combus-
tion pipe (13).
7. Carefully pull out the burner insert (5) by tilting.
IMPORTANT
The glow plug should be removed with extreme care and
must not be twisted (risk of breakage). After lengthy opera-
tion of the burner, the glow plug may be fixed in place by
fuel deposits. In this case, apply penetrating oil and allow to
work until the glow plug can be removed.
8. Unscrew the screw (7), pull the glow plug (6) out of the
burner insert and remove.
9. Remove the combustion pipe (13) and seal (12) from the
heat exchanger (9) and dispose of the seal separately.
10. Complete work on the stripped down components (see
9.1.1).
9.2.7.2 Installation
1. Fit a new seal (12, Fig. 904) into the heat exchanger (9)
and bring the combustion pipe (13) into the assembly
position.
2. Check that the starting air hole in the burner insert (5)
is clear.
If necessary, clean with a wire, approx. 4 mm dia.
(see Fig. 905).
IMPORTANT
When installing the glow plug, make sure that the contacts
point to the heat exchanger. Otherwise there is a risk of
short-circuiting.
3. Introduce the glow plug (6) into the burner insert (5)
and position the protective sheath in the slit of the burn-
er insert.
IMPORTANT
In the following procedure make sure that the glow plug is
placed in the burner insert up to the stop.
4. Secure the glow plug (6) with the screw (7). Tighten the
screw (7) to 0.5 Nm.
5. Introduce the burner insert (5) in the heat exchanger (9).
Make sure that the cable of the flame sensor (1) (only
present with petrol heater) is positioned under the fuel
line.
6. Guide the plug of the glow plug and the flame sensor
through the holes and press the cable grommets (10)
into the heat exchanger.
IMPORTANT
In the following procedure make sure that the grommet (8)
seals off tight with the heat exchanger (9).
7. Secure the burner insert (5) and the air baffle (3) with
screws (2). Tighten screws (2) to 6 ± 0.6 Nm.
8. Install the combustion air fan (see 9.2.5.2).
9. Fit the control unit (see 9.2.3.2).
10. Position the casing parts (see 9.2.2).
11. Install the heater (see 8.7.1.2)