39
Alpha InTec 40GS2 - Component Replacement
8.27 MAINS WATER INLET FILTER - Fig. 5.3
1.
The mains water inlet filter is located in the body of the DHW flow switch. Refer to Section 8.16 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.
8.28 DIVERTER VALVE CARTRIDGE - Fig. 8.3
1. Gain access behind the front casing and drain the boiler heating circuit as described in Sections 8.1 and 8.2.
2. Remove the diverter valve motor as described in Section 8.12.
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 6.1).
8.29 EXPANSION VESSEL - Fig. 8.1
Note:
Check that the pressure of the new vessel is 1 bar before it is installer.
To remove the expansion vessel from the front, the two DHW pipes to the GasSaver must be removed as described in
Section 8.31, paragraphs 1 to 8.
1. Gain access behind the front casing and drain the boiler heating circuit as described in Sections 8.1 and 8.2.
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 6.1).
8.30 THERMOSTATIC MIXING VALVE - Fig. 8.1
1. Gain access behind the front casing as described in Section 8.1.
2. Isolate the mains water supply and open all hot taps to drain any water from the boiler.
3. Undo the three union nuts from the valve.
4. Remove the two screws at the front securing the bracket and lift out the valve.
6. Fit the new valve with new washers and re-assemble in reverse order.
Note:
The replacement valve is pre-set to 30°C and does not require any adjustment.
8.31 GASSAVER HEAT RECOVERY UNIT - Fig. 8.1
1. Gain access behind the front casing as described in Section 8.1.
2. Isolate the mains water supply and open all hot taps to drain any water from the boiler.
3. Remove the primary heat exchanger as described in Section 8.19.
4. Withdraw the retaining clips (shown in Fig. 8.1) securing the two pipes to the flow switch manifold.
5. Remove the security clip from the push fit pipe clamp (shown in Fig. 8.1) and remove the clamp to separate the pipe. Lift
the pipe up out of the manifold and withdraw it from the boiler.
6.
Undo the union nut securing the other pipe to the bottom of the thermostatic mixing valve, lift the pipe up out of the manifold
and withdraw from the boiler.
7. Undo the two unions securing the outlet pipe from the GasSaver to the mixing valve (left hand side) to provide access to
the left hand GasSaver fixing screw.
8. Disconnect the silicone drain pipe from the flue drip tray.
9.
Remove the two screws securing the bottom of the GasSaver and loosen (do not remove) the fixing screws at either side.
Lower the unit on the fixing slots and slide the keyhole slots over the screw heads to remove.
10. Before fitting the new GasSaver, remove the remaining pipe from the thermostatic mixing valve and the top of the
GasSaver and remove the left side fixing screw of the mixing valve to unhook it from its bracket and remove the flue
outlet adapter. Transfer these parts to the replacement GasSaver.
11. Re-assemble in reverse order making sure that the flue connections are fully inserted.
12. The GasSaver should be filled with water through the inner flue duct. This should be done by removing the flue
connection on the top of the boiler and pouring 6 litres of water into the centre flue duct. See Fig. 5.4.
Содержание InTec 40GS2
Страница 51: ...51 Alpha InTec 40GS2 Page intentionally Blank...
