18
Alpha CB50 - Commissioning
5.4
INITIAL LIGHTING - Refer to Fig. 17
1.
Ensure that the gas and electrical supplies to the boiler are off, the selector switch is set to '0' and the central heating flow
and return valves are open.
2.
Turn on the gas and electrical supplies to the boiler.
3.
Ensure all external controls are calling for heat. If the optional Clock is fitted, refer to the User's instructions, set the time
and ensure the Clock is in an 'on' mode.
4.
Set the hot water and central heating temperature selectors to maximum.
5.5
CHECK THE BURNER PRESSURES - Fig. 18
Ensure the selector switch is set to 0, to turn off the boiler. Loosen the
burner pressure test point screw on the gas valve and connect a
pressure gauge.
Hot water mode
1.
Set the selector switch to
(DHW only) and the DHW thermostat
to maximum.
2.
The burner will light and the burner pressure will increase to
maximum.
3.
The burner will stay at maximum output for approximately 3
minutes and then the burner pressure will decrease slowly to its
minimum, until the hot water store obtains a temperature of 65°C.
4.
Check the burner pressures and that the burner goes out when the
store is satisfied.
The burner pressure settings have been factory set and do not
require adjusting. If incorrect, check that the inlet gas pressure is
20 mbar. If the inlet gas pressure is not 20 mbar, either the
pipework is too small or the gas supply to the house is insufficient,
in which case contact your supplier.
Central heating mode
1.
Set the selector switch to
(DHW and CH) and turn the CH thermostat to maximum.
2.
The burner will light at the factory pre-set maximum output.
3.
Set the selector switch to 0 to turn off the boiler. Disconnect the pressure gauge and tighten the test point screw.
Test for gas soundness using suitable leak detection fluid.
Note: Refer to Technical Data, section 2.1 for burner pressure settings.
5.6
FINAL COMMISSIONING
1.
Allow the heating system to heat up, then balance the system to achieve the necessary temperature difference across the
heating flow and return pipes at the boiler and check the system volume and pressure. (Refer to Technical Data, section 2.8).
2.
Set the selector switch to 0 to turn off the boiler.
3.
Thoroughly flush out the water pipework and clean the filters at the check valve and pressure reducing valve. (Refer to
section 2.10).
4.
Re-pressurise the system as described in section 5.1.
5.7
FINAL ASSEMBLY
1.
Raise the control panel and secure in position with the screws previously removed.
2.
Place the front casing in position and secure in position at the bottom using the screws previously removed.
3.
If the boiler is to be left in service with the User, set the controls, clock (if fitted, see User's Operating manual) and room
thermostat (if fitted) to the User's requirements.
4.
If the boiler is not to be handed over immediately, close the boiler gas service cock and switch off the electrical supply.
5.
If there is any possibility of the boiler being left during frost conditions, then the boiler and system should be drained.
(Refer to Component Replacement, section 8.2).
It is recommended that a label is attached to the boiler drawing attention to the fact that the system has been drained.
6.
Complete the details of the installation on the back page of this manual.
Fig. 18
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 ...
