Technical data

15
7. Fit the flue terminal to the outer duct by inserting it into the end with two holes. Align the holes and secure with the two
screws provided.
8. Place the inner flue duct back into the outer duct. Use the inner duct supports to centralise the duct in the outer duct.
9. Fit the flue assembly as described in the previous section. Due to the size of the flue clamps the flue must be fitted from
inside the building.
10. It may be necessary to support the flue with suitable brackets (every metre) when flue lengths approaching the maximum
are used.
4.8 CONNECT THE MAINS SUPPLY - Fig. 14
1. Gain access to the boiler terminal block by lowering the front
cover and removing the two fixing screws (one each side)
securing the control panel. Close the front cover, raise the
complete control panel slightly, hinging it forward at the same
time. Refer to Technical Data, section 2.9 for connection details.
2. Remove the screw securing the terminal block cover from the
back of the control box (see Fig. 14). Pass the mains supply cable
through the cable clamp and connect as follows:- Brown to L,
Blue to N and Green/Yellow to
. Ensure correct polarity.
Note: Ensure that the length of the earth wire is such that if
the supply cable is pulled out of its clamp the live and neutral
wires become taut before the earth wire.
The main terminal block can be removed by pulling it off the
pins to give easy access to the terminals.
Do not switch on the electrical supply at this stage.
3. If an external control, i.e. room thermostat or external clock is to be fitted, remove the terminal block cover and remove the
link between terminals 1 and 2. Pass the cable through the cable clamp, through the grommet (cut as necessary) and
connect it to terminals 1 and 2. Replace the terminal block cover. (Refer to section 2.9).
4. Replace the terminal block, ensuring it is located correctly on the plastic pins and replace the cover.
5. Ensure that there is sufficient free cable to allow the control panel to be raised and lowered then tighten the cable clamp screws.
6. Leave the control panel open until commissioning procedures have been completed.
7. Carry out electrical system checks - Short circuit, Polarity, Earth continuity and Resistance to earth with a suitable multimeter.
4.9 FIT THE CLOCK KIT - Fig. 15
Ensure the electrical supply to the boiler is isolated.
1. Remove the five screws securing the rear cover of the control panel and carefully raise the cover from the front.
2. 240XE only - Remove the ignition PCB as described in section 8.18.
3. Remove and discard the clock blanking panel.
4. Insert the clock into the opening and secure in place with the screws supplied.
5. Disconnect the clock wiring from the terminal block and connect it to the clock as follows:-
Blue wire to terminal 1, Brown wire to terminal 2 and Black wires to terminals 3 and 4, (or as per the instructions supplied with
the clock). Ensure wiring is correct.
6. Re-assemble in reverse order. When replacing the rear cover, ensure no wires are trapped and all wiring grommets are in
position. Do not overtighten the fixing screws.
7. Leave the control panel open until commissioning procedures have been completed.
Alpha 240XP and 240XE - Installation
Fuse
F2A
Remove link to connect
room thermostat
Terminal block cover
Cable
clamps
Fig. 15
Clock
Fig. 14
Control panel
Terminal without
clock fitted
Clock fitted
in position