Keston Combi 35kw User Manual download pdf (Page 43)

SERVICING

Keston Combi - Installation and Servicing

RETURN THERMISTOR RENEWAL

1. Refer to Frame 44.

2. Unclip the return thermistor from the return pipe and withdraw it from the

boiler.

3. Disconnect the electrical lead from the thermistor.

4. Reconnect the electrical lead to the new thermistor and reassemble in

reverse order, ensuring that the thermistor is securely tted to the pipe on the

thermistor locator tabs as shown.

5. Check the operation of the boiler. Refer to Frames 29-35.

Thermistor Locator Tab

(with thermistor tted)

FLUE THERMOSTAT REPLACEMENT

1. Refer to Frame 45.

2. Undo the two screws and remove the

sump cover plate.

3. Disconnect the two ag terminals

from the ue thermostat.

4. Lift the manifold to clear the bottom

sealing gasket and remove manifold.

5. Unscrew the two M3.5 screws

that connect the thermostat to the

manifold.

6. Replace thermostat with new part

and then ret the two screws,

remembering to t rubber gasket and

sealing clamp.

Flue Thermostat

SERVICING

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Keston Combi 35kw User Manual Page 43