24
Fig. 5.3
Fig. 5.2
Differential
Burner
pressure
Alpha CD13R, 18R, 24R - Commissioning
Do not
connect
here
Do not connect here
Inlet gas
pressure
test point
3. Turn off the boiler. Disconnect the pressure gauge and tighten the test point screws. Test for gas soundness using
suitable leak detection fluid.
Note: 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 gas supplier. If the differential burner pressures are still incorrect contact Alpha.
Note: Refer to Technical Data, Section 2.1 for the required differential burner pressures.
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.
2. Turn off the boiler.
5.7 FINAL ASSEMBLY
1. Raise the control panel and secure in position with the screws provided, locate the front casing panel in position and
secure with the screw at the top of the panel.
2. If the boiler is to be left in service with the User, set the controls, clock (if fitted, see Clock User's Operating manual) and
room thermostat (if fitted) to the User's requirements.
3. If the boiler is not to be handed over immediately, close the boiler gas service cock and switch off the electrical supply.
4. If there is any possibility of the boiler being left during frost conditions, then the boiler and system should be drained (refer
to 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.
5. Complete the details of the installation in the Benchmark Checklist on page 33.
5.8 USER INFORMATION
The User must be advised (and demonstrated if necessary) of the following important points:-
1. How to light and turn off the boiler and how to operate the system controls.
2. The importance of annual servicing of the boiler to ensure safe and efficient operation.
3. That any servicing or replacement of parts must only be carried out by CORGI registered personnel.
4. Ensure that the boiler controls and room thermostat (if fitted) are set to the User's requirements.
5. Tell the User that if the electrical supply is on and the boiler has not operated for 24 hours for heating, the pump will
automatically operate for 5 minutes.
6. Explain to the User that an internal frost thermostat is fitted in the boiler, and that the electrical supply to the boiler must
be left on for the thermostat to operate.
7. Explain to the User that in certain weather conditions the terminal will emit a plume of steam, i.e. water vapour. This is
safe and quite normal.
8. Show the User the position of the condensate discharge pipe.
9. Hand the User's instructions to the User.
10. Complete the details of the installation in the Benchmark Checklist at the back of these instructions.
11. Leave these Installation and Servicing instructions with the User for use on future calls.
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