Spheros Thermo E 200 - Control Unit Removal and Installation

Thermo E 200 / 320 8 Repair
807
8.7 Control unit removal and installation
Removal
1. Remove burner (see 8.2).
2. Disconnect all inside located plugs (motor, nozzle
block preheater, electronic ignition unit, solenoid
valve).
3. Remove fuel pump (see 8.8).
4. Remove electronic ignition unit (see 8.6).
5. Remove motor (see 8.5).
6. Remove control unit attaching screw.
7. Remove control unit.
Installation
1. Position control unit.
2. Tighten control unit attaching screw (2 +0.5 Nm).
3. Install motor (see 8.5).
4. Install electronic ignition unit (see 8.6).
5. Install fuel pump (see 8.8).
6. Reconnect all inside located plugs (motor, nozzle
block preheater, electronic ignition unit, solenoid
valve).
7. Install burner (see 8.2).
8.8 Fuel pump removal and installation
NOTE
Make sure that any fuel leaking is immediately collected,
bound and professionally disposed of.
Removal
1. Remove burner (see 8.2)
2. Lift off ignition electrode (2, Fig. 804) from the
electronic ignition unit by twisting a screwdriver
sideways (see Fig. 804).
3. Remove disc (3).
4. Disconnect the solenoid valve plug (6, Fig. 805) and
the optional nozzle block preheater (7) from the
control unit (15).
5. Remove screws (13).
6. Pull fuel pump (10) with solenoid valve (6) off and
remove it.
7. If applicable, remove the nozzle block preheater (7).
For this purpose, remove clamp (9) from the nozzle
holder using suitable tools.
8. If necessary, remove the solenoid valve (6) from the
fuel pump (10) (see 8.9).
Installation
1. If necessary, attach solenoid valve (6, Fig. 805) to the
fuel pump (10) (see 8.9).
2. If applicable, install nozzle block preheater (7) and
secure with clamp (9) to the nozzle holder using
suitable tools.
3. If required, attach new O-rings (11) and a new screen
(12) to the fuel pump (10).
4. Slide the coupling (17) with magnets onto the fuel
pump (10) shaft.
ATTENTION
In order to avoid damage to the O-rings, do not twist fuel
pump (10) during assembly.
New screws with coated threads must be used for
installing the fuel pump.
5. Align fuel pump (10) with the burner housing (14) and
bring it into installation position. Align the coupling
with magnets (17) with the burner motor by turning the
burner motor shaft.
6. Mount the fuel pump (10) using new screws (with
coated threads) (13) and tighten the screws with 5 Nm
+1 Nm.
7. Connect solenoid valve plug (6) and, if applicable, the
optional nozzle block preheater (7) to control unit (15).
8. Fit disc (5) onto the nozzle holder and align it with the
flame detector in the control unit (15) and the
electronic ignition unit (1).
9. Fit ignition electrode (3).
10. Install burner (see 8.2).