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5.10 CONNECT THE MAINS SUPPLY - Fig. 5.14
1.
Gain access to the boiler terminal block by releasing the two fixing screws (one each side) securing
the control panel and lowering the panel. Refer to Technical Data, Section 3.5 for connection details.
2. The boiler is supplied with a 'Special X' type electrical
connection with a PVC <HAR> H05VV-F 3 x 0.75 cable
without a plug. If the power cable is damaged or replaced,
it must be replaced with a cable supplied by Alpha or
authorized After-Sale Technical Service. Replacement
is recommended using a qualified company in order to
prevent any risk. Ensure the cable clamp that has been
fitted is removed and connect as follows:-
Remove the three screws securing the terminal block
cover from the back of the control box (see Fig. 5.14).
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 and connect it to terminals 1 and 2. Replace the terminal block cover. (Refer to Section 3.5).
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.
5.11 FIT ALPHA CONTROLS (standard 230 V clock option) - Fig. 5.15
Ensure the electrical supply to the boiler is isolated.
Important:
Only use the Alpha single channel controls.
Do not
fit any two channel controls.
1. Remove the three screws securing the terminal block cover at the rear of the control panel.
2. Remove the terminal block cover.
3. Remove the control connection cover and connect the control as follows:-
Blue wire to terminal 1, Brown wire to terminal 2 and Red wires to terminals 3 and 4, (or as per the instructions supplied
with the control). Ensure wiring is correct.
4. Remove and discard the blanking panel.
5. Insert the control into the opening and secure in place with the three screws supplied.
6. Replace the terminal block cover. Do not overtighten the fixing screws.
7. Leave the control panel open until commissioning procedures have been completed.
Alpha InTec 40GS2 - Installation
Fig. 5.15
Grommets
Cable clamps
Rear of control panel
Remove link 1 to 2
when connecting
external controls
Relay board
Control fixing screws
Terminal block cover
Fig. 5.14
Grommets
Terminal block cover
Cable clamps
Rear of control panel
Remove link 1 to 2
when connecting
external controls
Relay board
Mains terminal strip
