17
Alpha SolarSmart 100 - Installation
4.9 ELECTRICAL CONNECTIONS - See Wiring Diagram Section 9
1. If the case is not already removed, remove the two screws
(top of the control panel) securing the cylinder case and
carefully pull off the case.
The cylinder sensors and cylinder pump are already
connected.
2. Remove the two screws securing the terminal block cover to
the left of the control unit as shown in Fig. 20.
3.
Connect the Drain Back Unit pump -
The drain back unit pump
is fitted with a 1.9 m cable. Route the cable to the solar cylinder
control unit through the hole in the bottom of the cylinder case
(as indicated in Fig. 20) and pass it through a cable clamp.
The DBU cable can be extended if required using standard
mains 3-core flex.
Connect the Brown wire to terminal 12, Blue wire to terminal
13 and Green/Yellow wire to
on the terminal block.
Ensure that the cable is secured in the cable clamp.
4.
Connect the Collector Sensor -
The sensor is supplied with
a 3 m cable, a 9 m extension cable is also supplied with the
cylinder.
Route the cable to the solar cylinder control box through the
hole in the bottom of the cylinder case (as indicated in Fig.
20) and pass it through a cable clamp.
Connect the White and Red wires to terminals 45 and 46 (the
polarity is not important) on the terminal block.
Ensure that the cable is secured in the cable clamp.
5.
Connect the Mains Supply
The solar cylinder has been fitted with a 2.5 m mains supply
cable. However, if it is necessary to fit an alternative supply
cable refer to Section 3.1 and release the cable clamp.
Connect the new lead as follows:
Brown wire to 2, Blue wire to 1 and Green/Yellow to the earth
point using a suitable spade connector.
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.
6.
Fitting the optional Alpha immersion heater
Remove the blanking plug and washer as shown in Fig. 21.
Insert the element and secure in position using a new sealing
washer.
Pass the immersion heater cable through a cable clamp and
connect the wires, Brown to terminal 69, Blue to terminal 70
and Green/Yellow to
on the terminal block.
Ensure that the cable is secured in the cable clamp.
7. Replace the connector block cover but do not switch on the
electrical supply at this stage.
Immersion heater
and washer
Terminal block
and cable clamps
Fig. 21
Fig. 20
Terminal block
cover
Fixing screws
Immersion heater
plug
Pump vent screw
(under cap)
Pressure relief
valve
Pressure relief
valve
Expansion
vessel test
point (under cap)
Mains supply cable and
case entry for other leads
