Atmos Energy InterCombi HE32 User Manual download pdf (Page 52)

9.2.5 Burner/ spark ignition probe

Remove the front cover of the heat exchanger as described in § 9.1.2.

Unscrew the 4 screws shown on the photo to allow the stainless steel

burner mesh to be removed. These screws are Torx 20 (RVS A2 4,2x25”)

or Allen bolt M4x20 (units before 2006). The burner gasket should be

checked and replaced if damaged. Replace the burner mesh assembly

and refit the screws.

The spark ignition probe is shown in the photo in § 9.1.2 and also the

diagram in § 8.2. To replace the probe, pull off the ignition cable and

unscrew the 2 screws (Allen bolt M4x8). The seal should be checked and

replaced if damaged. Replace the probe and refit the seal and the screws.

Check the spark gap and replace the front cover, as described in § 9.1.2.

9.2.6 Flow/ return temperature sensors

The supply temp. sensor is located above the return temp. sensor. The

latter is shown in the photo. Disconnect the two pin connector and release

the spring clip. Pull out the sensor and replace.

Note: The replacement of the components below this box

requires the appliance to be drained:-

CH side – Drain the appliance using the drain tap and drain the

system at the lowest point.

HW side – Close the valve for the cold water into the appliance

and drain by disconnecting the HW connections underneath the

appliance or opening hot water taps.

After replacement, refill the appliance as given in § 6.1.

9.2.7 Flow switch

Disconnect the two pin connector and undo the two unions to release

the flow switch. Ensure that the two sealing rings and brass ring are

not damaged and are replaced with the new flow switch.

Note: When replacing with new device, ensure arrow for flow on the

black body is pointing vertically upwards.

9.2.8 Pressure relief valve

Remove the plastic pipe from the safety discharge. Undo the pressure

sensor capillary and undo the union at the connection with the CH flow

pipe. Remove the pressure relief valve and inlet pipe. Remove the

plastic fitting from the discharge and undo the pipe connection to allow

removal of the valve. Fit replacement valve in reverse order using a

sealant suitable for potable water.

9.2.9 Pressure gauge sensor

Undo the pressure sensor capillary and unscrew the two posidrive

screws to release the cable clamp. Remove the gauge and capillary,

and replace.

9.2.10 Hot water temperature sensor

Remove the electrical connector. Undo the sensor with its ‘O’ ring and

replace.

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Atmos Energy InterCombi HE32 User Manual Page 52

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