13
Fig15
Power Supply Unit (PSU)
lid screw
grommet for
sensor cable
lid
PCB
terminal block
for mains
connection
transformers with
thermal fuse
complies with
EN60950
lid seal
PSU case
grommet for
power cable
(bottom entry)
output voltage 6V
-complies with
IEE wiring regulations
safety extra low voltage
(SELV)
Use either socket connector for
grey sensor cable or link cable
mains supply (210 - 250 volt)
should be via an RCD
(max trip 30 mA)
and fused spur
(fused at 3 amp)
power cable not supplied
Next, open the PSU case by un-
screwing 4x posi-drive screws; the
lid & seal should separate from the
PSU case. Slide out the PCB (Print-
ed Circuit Board) from the case.
With the mains power switched off,
prepare the mains power cable (not
supplied). This should be flexible 3A
rated 2 core cable. Carefully remove
about 100mm of outer cable sheath-
ing, strip the wire ends back by
about 5mm.
Feed the cable through the grommet
at the base of the case (cut small slot
in grommet first).
Connect the appropriate mains wires
to the L (Live) & N (Neutral) marked
on the terminal block on the PCB.
Slide the PCB back into the case
(note guide slots), allowing the
mains wires to rest in-front of the
transformer.
DO NOT leave wires on top of the
transformer as this may prevent the
lid from closing completely
Installation: electrical continued…
Locate the end of the red & black cable which is attached
to the rear of the sensor. Cable length is 750mm.
Connect this cable to the spade connectors shown on
the link cable. O and – Ensure red is connected
to red & black to black.
Fig14
View from rear showing sensor cable fitted to one solenoid valve
connect sensor
cable onto
additional spades
