28
8.30 DHW STORAGE CYLINDER
1.
Drain the boiler heating and hot water circuits as described in section 8.2.
2.
Remove the heating and domestic hot water expansion vessels as described in sections and 8.26 and 8.27.
3.
Remove the DHW temperature/pressure relief valve as described in section 8.29.
4.
Remove the storage temperature sensor as described in section 8.20 and the automatic flow regulator thermostat as
described in section 8.35.
5.
Remove the six screws securing the front casing top bracket to both side panels and the room sealed chamber. Remove
the bracket.
6.
Disconnect and remove all the pipework from the cylinder and the pipework to the combustion chamber/primary heat
exchanger from the flow and return manifolds.
7.
Remove the cylinder retaining screw, positioned beneath the cylinder on the backplate.
8.
Lift the cylinder upwards to disengage it from the top of the boiler's backplate. Pull the cylinder forward and out of the boiler.
9.
Re-assemble in reverse order using new seals.
10. Refill and pressurise the heating and hot water circuits. (Refer to Commissioning, section 5.1).
8.31 PRESSURE REDUCING VALVE FILTER/CARTRIDGE - Refer to Fig. 12
1.
Close the mains water supply valve and ensure that all hot water taps are closed. Release the pressure from the hot water circuit.
2.
Unscrew the cartridge from the valve body.
3.
Clean or replace the filter/cartridge and re-assemble in reverse order.
4.
Refill and pressurise the hot water circuit by opening the mains water supply valve.
8.32 CHECK VALVE - Refer to Fig. 12
1.
Close the mains water supply valve and ensure that all hot water taps are closed. Release the pressure from the hot water circuit.
2.
Disconnect the automatic flow regulator (L in Fig. 12) unions and remove.
3.
Unscrew the check valve housing (K in Fig. 12) and push the check valve out of its housing.
4.
Re-assemble in reverse order. Refill and pressurise the hot water circuit by opening the mains water supply valve.
8.33 EXPANSION RELIEF VALVE - Refer to Fig. 12
1.
Close the mains water supply valve and ensure that all hot water taps are closed. Release the pressure from the hot water circuit.
2.
Disconnect the relief valve union and discharge pipe and remove the valve.
3.
Fit a new valve using new sealing washers and re-assemble in reverse order.
4.
Refill and pressurise the hot water circuit by opening the mains water supply valve.
8.34 AUTOMATIC FLOW REGULATOR VALVE - Refer to Fig. 12
1.
Close the mains water supply valve and ensure that all hot water taps are closed. Release the pressure from the hot water
circuit.
2.
Disconnect the two flow regulator unions and remove the valve from the boiler.
3.
Re-assemble in reverse order using new washers.
Alpha CB50 - Component Replacement
Summary of Contents for Alpha CB50 Boiler
Page 29: ...29 9 WIRING DIAGRAMS 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Page 30: ...30 9 2 FUNCTIONAL FLOW WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Page 32: ...32 Alpha CB50 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence ...
Page 33: ...33 Alpha CB50 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F ...
Page 34: ...34 Alpha CB50 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L ...
