Alpha CD12S, Инструкции по установке и обслуживанию

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5.5 CHECK THE BURNER PRESSURES - Figs. 27, 28
Turn the boiler off. Remove the two pressure test point screws at the top of the boiler and connect a differential pressure
gauge to P1 and P2 as shown in Fig 28. Allow the boiler to run for 10 minutes and check the differential burner pressures.
Central heating mode
1. Set the selector switch to (CH).
2. The burner will light at the ignition rate and will increase to the factory pre-set maximum output after 1 minute.
3. Turn off the boiler. Disconnect the pressure gauge and tighten the test point screws.
Test for gas tightness using suitable leak detection fluid.
Note: Refer to Technical Data, Section 2.1 for the required differential burner pressures.
Alpha CD12S/20S/28S - Commissioning
Fig. 27
Do not
connect
here
Do not connect here
Inlet gas
pressure
test point
Fig. 28
+
+
-
-
P1 P2
Flue sample
point (marked 'F')
- +
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,
Sections 2.1 and 2.2).
2. Turn off the boiler.
4. Thoroughly flush out the water pipework (refer to Section 3.9) and with no pressure in the boiler heating circuit, empty the
cyclone (if applicable) at it's drain point (see Fig. 14b) of any debris.
5. 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 provided.
Note: If the wall jig is used, fit the bottom tray over the base of the boiler.
2. 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.
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 in Section 12.