23
Alpha E-Tec S 20 and 30 - Installation
4.10 CONNECT THE MAINS SUPPLY - Figs. 4.14 and 4.15
Gain access to the boiler terminal block 'D' as follows:-
Remove the case front panel, refer to Sections 6.1 and 6.2.
Remove the control panel cover 'B'.
1. Remove the one screw 'A' in Fig. 4.14.
2. Depress the two clips on the control panel cover.
3. Remove the cover 'B' from the control panel 'C'.
Refer to Technical Data, Section 2.5 for connection details.
Note: This boiler has been fitted with a mains supply cable.
However, if it is necessary to fit an alternative supply cable,
ensure the cable clamp that has been fitted is removed and
connect as follows:-
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.
Do not switch on the electrical supply at this stage.
If an external control, i.e. room thermostat or external
clock is to be fitted, remove the link between terminals
1 and 2. Pass the cable through the cable clamp and
connect it to terminals 1 and 2. (Refer to Section 2.5).
Leave the control panel open until commissioning
procedures have been completed.
Carry out electrical system checks - Short circuit, Polarity,
Earth continuity and Resistance to earth with a suitable
multimeter.
4.11 FITTING BOILER CONTROLS
It is recommended that Alpha controls are used with the
boiler to maintain efficient and correct operation of the boiler. Please note that using controls that are not supplied or
recommended by Alpha may invalidate the boiler warranty and may not control the boiler correctly.
Alpha offer a number of controls options from simple in-built mechanical timers to remote wireless programmable controllers.
The Alpha Climatic Programmable Modulating Boiler Energy Manager is a two-channel time and temperature programmer
with integrated thermostat and 'BUS' system to transfer data between the boiler and controller, enabling full remote control
of the boiler functions and display of information. With enhanced boiler control, the unit further increases boiler and system
efficiency. Alternatively standard programmable room thermostats or mechanical and digital boiler clocks are available.
Note: Only use a Climatic or suitable single channel Alpha controller. Do not fit a two channel controller.
Connecting Controls
Remove the control panel cover as described in Section 4.10, if it has not already been removed.
Refer to Sections 2.5 and 8.1 for electrical connections and wiring diagram.
Climatic RF receiver installation (only with the Alpha Diverter Kit part No. x.xxxxxx)
1. Plug the connecting wire onto the Climatic receiver PCB
supplied with the controller.
2. Using the two screws provided, fix the receiver PCB into
position.
3. Route the wire along the groove in the control panel to
terminal block connections 44 and 41 (the wires can be
connected either way round).
4. Remove the links between terminal blocks 1 and 2.
5. Replace the control panel cover in reverse order.
Note: Ensure all wires and connections are secured safely
before replacing covers.
Fig. 4.16
Climatic receiver
Fig. 4.14
B
C
D
2
2
A
1
3
Fig. 4.15
Cable clamps
Cable entry
230 V control
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