802
Thermo AC/DC
8 Repairs
8.2
Temperature guards (temperature
limiter, control thermostat)
removal/installation.
Removal
1. Establish voltage-free state of the heater and secure
it for duration of the work (
Observe
!
).
2. Disconnect temperature guards plug (1,
).
3. Remove the rubber cap of the temperature limiter (4).
4. Using a screw driver, lever off retaining spring (3) and
remove the temperature limiter (2).
5. Remove the protection cap (6) of the control ther-
mostat (7).
6. Screw out by hand the control thermostat (7).
NOTE:
The control thermostat is screwed into the screw-in
socket, which should not be loosened.
Installation
1. Screw the control thermostat (7,
) by hand into
the coolant inlet.
2. Install protection cap (6).
3. Slide rubber cap (4) of the temperature limiter back
until it can be put in its installation position.
4. Position temperature limiter (2) in the reception neck
(5) and push in the retaining clip (3).
ATTENTION:
The retaining spring must be located in the groove of
the reception neck and must be latched in position
both perceptibly and audibly (twice) at the collar of
the reception neck. Only then will the temperature
limiter be in proper contact with the heat exchanger
jacket.
NOTE:
The rubber cap (4) must be fitted in such a way that its
cable sleeve runs in the direction of the heater’s centre
line. After the rubber cap has been fitted, the cable in the
sleeve must be adjusted without tension.
5. Install the rubber cap.
After the rubber cap has been installed, the cable
must be aligned in the cable sleeve so it is tension-
free. Connection cables must not be routed over the
reset button.
6. Reconnect the temperature guards plug (1).
7. Restore the power supply as required.
Fig. 801 Removal and installation of the temperature guards
3
2
4
8
1
7
6
5
1 Temperature guards plug
2 Temperature limiter
3 Retaining spring
4 Rubber cap
5 Reception neck
6 Protection cap
7 Control thermostat
8 Screw-in socket
hand tight
20 ±2 Nm
