User's Manual

9Repair Thermo 90 S / Thermo 90 ST
910
9.2.8 Changing the heat exchanger
9.2.8.1 Removal
1. Remove the heater (see 8.7.1.1).
2. Remove the circulating pump (see 9.2.2.1).
3. Remove the temperature limiter (see 9.2.3.1).
4. Remove the temperature sensor (see 9.2.4.1).
5. Remove the combustion air fan (see 9.2.5.1).
6. Remove the burner, flame monitor and glow plug
(see 9.2.6.1).
7. Remove the burner head (see 9.2.7.1).
8. Remove the plug and connector housing.
9. Complete the work on stripped-down components
(see 9.1.1).
9.2.8.2 Installation
1. Clip the connector housing onto the heat exchanger
and insert the plug into the connector housing.
2. Install the burner head (see 9.2.7.2).
3. Install the burner, flame monitor and glow plug
(see 9.2.6.2).
4. Fit the combustion air fan (see 9.2.5.2).
5. Install the temperature sensor (see 9.2.4.2).
6. Install the temperature limiter (see 9.2.3.2).
7. Fit the circulating pump (see 9.2.2.2).
8. Install the heater (see 8.7.1.2).