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ManualsBrandsBenchmark ManualsBoilerAlpha InTec 18SNG
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Alpha InTec C and X - Component Replacement
7.29 MAINS WATER INLET FILTER - Fig. 13
1. The mains water inlet filter is located in the body of the DHW flow switch. Refer to Section 7.17 to remove the flow
switch.
2. The filter can be removed using a small screwdriver.
3. Clean the filter and re-assemble in reverse order.
7.30 DIVERTER VALVE CARTRIDGE - Fig. 32
1. Gain access behind the front casing and drain the boiler heating circuit as described in Sections 7.1 and 7.2.
2. Remove the diverter valve motor as described in Section 7.13.
3. Using a 28 mm spanner turn the diverter valve cartridge anticlockwise until its retaining lugs hit the stops.
4. Withdraw the cartridge taking care not to spill any water onto any electrical components.
5. Insert the new cartridge with the locating lug at the top and push firmly into place. Using a 28 mm spanner turn the cartridge
clockwise until the retaining lugs are locked into position.
6. Re-assemble in reverse order.
7. Refill and pressurise the system. (Refer to Commissioning, Section 5.1).
7.31 EXPANSION VESSEL - Fig. 30
Note: Check that the pressure of the new vessel is 1 bar before it is installer.
1. Gain access behind the front casing and drain the boiler heating circuit as described in Sections 7.1 and 7.2.
2. Disconnect the pipe from the expansion vessel.
3. Remove the screw securing the top support bracket.
4. Remove the three screws securing the side panel and remove the panel.
5. Lift the expansion vessel out of the boiler.
6. When replacing the vessel, ensure that the connection is towards the left of the boiler and re-assemble in reverse order
using new seals as necessary.
7. Refill and pressurise the system. (Refer to Commissioning, Section 5.1).
7.32 SEASONALITY VALVE (C models only) - Fig. 13
1. Gain access behind the front casing and drain the hot water circuit as described in Sections 7.1 and 7.2.
2. Remove the valve by disconnecting the unions from the bottom of the boiler, the mains inlet valve and filling loop.
3. Re-assemble in reverse order using a new valve.