Esoteric DV-30s Service Manual download pdf (Page 36)

36 REPLACEMENT OF PARTS Manual No. 405/0101

REPLACEMENT OF PARTS - PAGE 36

9.16 TO REPLACE THE GAS VALVE SOLENOIDS

Refer to Fig. 40.

1. Gain general access as described in section 9.1,

paragraph 1.

2. Disconnect the gas valve electrical plug from the valve.

3. Remove the screw securing the solenoids mounting

bracket and carefully withdraw the mounting bracket,

complete with solenoids, from the valve.

4. Position the new solenoids in the mounting bracket, see

Fig. 40 and replace the mounting bracket.

5. Reconnect the plug to the gas valve and reassemble the

boiler as described in section 9.2, paragraphs 7 to 9.

6. Refer to the Lighting Instructions, section 8 and light the

boiler.

Fig.40

9.17 TO REPLACE THE IGNITION CIRCUIT BOARD

Refer to Fig. 41.

1. Gain general access as described in section 9.1,

paragraph 1.

2. Remove the four screws securing the control box front

cover and carefully swing down the cover.

3. Disconnect the three wiring connectors and the electrode

lead from the circuit board, see Fig. 41.

4. Carefully remove the circuit board from the mounting

pillars and replace with a new one.

5. Replace the wiring connectors and the electrode lead.

6. Replace the control box front, ensuring that the boiler

thermostat capillary is located in the cut out in the side of

the control box and secure it in position with the four

screws previously removed.

7. Reassemble the boiler as described in section 9.2,

paragraphs 6 to 9.

8. Refer to the Lighting Instructions, section 8 and light the

boiler.

Fig.41

9.18 TO REPLACE THE PUMP

1. Gain general access as described in section 9.1, paragraph 1.

2. Remove the screw securing the control box, see Fig. 25 and lower the control box.

3. Close the two pump isolating valves (closed when the operating spindles are vertical).

4. Place a cloth under the pump as it will contain a small amount of water when removed.

5. Loosen the two pump unions (immediately either side of the pump), taking care not to twist the pipework. Support the

pump and remove the two pump unions. Withdraw the pump to provide access to the two wiring cover screws, remove

the screws and cover then disconnect the wires.

6. Note which way the pump motor is fitted to the body - the replacement pump motor may have to be removed and

rotated to match the old one.

The arrow on the pump body, indicating the direction of flow must be pointing from left to right.

7. Connect the wires to the new pump - Brown to L, Blue to N and Green/Yellow to then replace the pump using two new

sealing washers.

8. Open the pump isolating valves. Vent the pump as described in section 3.16, paragraph 4 and check the pump

connections for water soundness.

9. Reassemble the boiler as described in section 9.2, paragraphs 5 to 9.

10. Refer to the Lighting Instructions, section 8 and light the boiler.

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Esoteric DV-30s Service Manual Page 36

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