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10.4.5 Hydraulic pressure sensor
1. Close the flow and return isolation taps.
2. Drain the primary circuit.
3. Hinge the control box down.
4. Remove the air/gas unit.
See
Air/gas unit, page 58, paragraph 1 to 6 to remove.
5. Pull the two spade connections off the hydraulic pressure sensor.
6. Draw the securing clip forwards to release the sensor and remove.
7. Fit new sensor and reassemble in reverse order.
10.4.6 DHW flow sensor (hall effect sensor)
1. Hinge the control box down.
2. Remove the air/gas unit.
See
Air/gas unit, page 58, paragraph 1 to 6 to remove.
3. Pull the sensor off the DHW inlet manifold.
4. Disconnect the plug from the sensor and connect it to the new
component.
5. Fit the new sensor, ensuring it is correctly oriented and fully engaged
over the manifold.
10.4.7 DHW flow regulator and filter
Important
It is recommended to isolate the cold water mains stop cock to the
dwelling.
1. Close the cold mains inlet.
2. Drain off any residual DHW.
3. Hinge the control box down.
4. Remove the air/gas unit.
See
Air/gas unit, page 58, paragraph 1 to 6 to remove.
5. Pull out the securing clip and prise the regulator and filter assembly
out of the hydraulic inlet assembly.
6. Twist the body to unlock the bayonet connection on the filter and
remove the regulator.
7. Examine and clean the filter or replace.
8. Fit the new regulator and reassemble in reverse order.
Fig.65
Removing the hydraulic pressure
sensor
PN-0000534
Fig.66
Removing the DHW flow sensor
(Hall effect sensor)
PN-0000535
Fig.67
Removing the DHW flow regulator
and filter
PN-0000536
10 Maintenance
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Содержание Combi 200
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