INSTALLATION INSTRUCTIONS
Hydrosense Conventional Water Detection System
Document Part No. 3500012 REV03
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lift the fascia gently away from the box towards you. With the fascia removed there is much
more room inside the panel for making off and dressing cables. When cabling work is
complete the fascia can be re-fitted with the two countersunk screws and the red,
green/yellow and black wires re-connected to the three way terminal block
NOTE:
It is most important that the polarity of the red and black wires are observed as
wrong connection of these will damage the control panel.
Connecting to the circuit board
All connections for field wiring are to a single row of terminals along the top of the circuit
board. The connections for the power cables are to a pluggable terminal block, which may
be pulled off of the board to remove the plate/PCB assembly. Remove this pluggable
terminal only with mains power off. For Zone connections twin PVC cable with conductors of
.75mm to be used and plastic or metal cable glands can be used for all connections to the
panel.
The resistance of any core of any cable must not exceed 25 ohms.
Wiring should enter the enclosure at the top of the panel using the knockouts provided and
be formed tidily to the appropriate terminals leaving enough wire to ensure that there is no
strain on the PCB. Terminals are capable of accepting wires of up to 2.5mm
Figure 2
Terminal designations
Wiring must not go across the front of the circuit board plate or between the plate and the
circuit board. If cable entries need to be in positions other than at the knockouts provided,
wiring must be fed behind and well away from the surface of the circuit board. The space at
the bottom of the enclosure is occupied by the standby batteries so this must be borne in
mind when considering cable entries.
Remote Inputs
Some functions of the control panel can be controlled externally from the panel if required.
Operation of these inputs should be restricted to access level 2 control. These are
abbreviated at the terminals block as follows:
a) Remote 0V supply - ROV
d) Fault – FLT
b) Silence Alarm – SIL
e) Reset – RST
c) Sound Alarm – AL
To activate these inputs, the remote 0 Volt (R0V) supply must be connected to the input via
a normally open switch or contact and via a resistance of no greater than 100 ohms.
All of the remote control inputs are non-latching.
