26
8.19 PRESSURE GAUGE - Fig. 24
1.
Gain access as described in section 8.1.
2.
Drain the boiler heating circuit as described in section 8.2.
3.
Remove the nut securing the pressure gauge sensor to the return manifold and withdraw the sensor.
4.
Remove the gauge from the control panel by depressing the plastic lugs on the gauge.
5.
Fit the new gauge using a new washer to seal the sensor connection.
6.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
8.20 TEMPERATURE SENSORS - Fig. 25
The temperature sensors fitted to the hot water storage (dry pocket) and primary heat exchanger (wet pocket) are both the
same. Refer to Fig. 2 for their location.
1.
Gain access as described in section 8.1. When replacing the primary sensor, drain the boiler as described in section 8.2.
2.
Disconnect the wiring and unscrew the sensor. Re-assemble in reverse order with a new sensor.
8.21 AUTOMATIC AIR VENT - Fig. 25
1.
Drain the boiler heating circuit as described in section 8.2.
2.
Disconnect the return pipe unions at the pump and room sealed chamber and remove the pipe.
3.
Unscrew the automatic air vent from the pump outlet. Fit a new one using a new 'O' ring.
4.
Re-assemble in reverse order.
5.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
8.22 PUMP - Fig. 25
Drain the boiler heating circuit as described in section 8.2.
Pump Head
1.
Remove the four socket head screws securing the pump head to the body. Withdraw the head, remove the wiring cover
and disconnect the wiring.
2.
Connect the wiring to the new head as follows:-
Brown to L, Blue to N, Green/yellow to
.
Ensure the pump is set to maximum (3) and re-assemble in reverse order.
3.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
Complete pump
1.
Disconnect the pump unions and withdraw the pump, remove the wiring cover and disconnect the wiring.
2.
Unscrew the automatic air vent from the pump outlet.
3.
Connect the wiring as described above, ensure that pump is set to maximum and re-assemble using new sealing washers.
4.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
Alpha CB50 - Component Replacement
Fig. 25
Automatic air vent
Pump
Diverter valve
Primary pressure switch
Heating pressure switch
DHW expansion vessel
Store temperature sensor
Содержание Alpha CB50 Boiler
Страница 29: ...29 9 WIRING DIAGRAMS 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Страница 30: ...30 9 2 FUNCTIONAL FLOW WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Страница 32: ...32 Alpha CB50 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence ...
Страница 33: ...33 Alpha CB50 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F ...
Страница 34: ...34 Alpha CB50 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L ...
