Dover OPW SiteSentinel iSite - Discriminating Dispenser Pan Sensor; Installation

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5.7 Discriminating Dispenser Pan Sensor
Part No. 30-0232-DH-10
The Discriminating Dispenser Pan Sensor (Figure 5-7) detects
abnormally high or low liquid levels and distinguishes liquid type (water
or hydrocarbons) using a polymer strip and float technology. The
polymer strip will change resistance showing hydrocarbon detection; if
the polymer doesn't change resistance it indicates detection of water.
Detection of either will result in an alarm condition, as will a break in the
cable or sensor malfunction.
*Maximum Wiring Length is the maximum length of cable to be used
to connect all sensors on an individual channel. This length includes
run of cable from VSmart to each sensor board in the string.
5.7.1 Installation
1. Check that the dispenser pan is dry.
2. Install the bracket with pipe clamp and sensor bracket.
3. Position the sensor to touch the bottom of the pan.
4. Connect the sensor cable to the sensor and field wiring.
5. Seal the electrical connections with the epoxy seal pack.
6. Remove the sensor from sump while servicing the pump to
prevent activating the sensor with fuel.
Figure 5-7 Discriminating
Dispenser Pan Sensor
Discriminating Dispenser Pan Sensor Specifications
Primary Use(s):
Dispenser Pan/Sump
Alternate Use(s):
STP Sumps
Detects:
Low Liquid, High Liquid, Fuel
Operating Temperature:
-40°F to 158°F (-40°C to +70°C)
Dimensions:
Length: 11.1” (28.2 cm), Diameter: 2.3” (5.8 cm)
Float Requirements:
Low: 1.5” (3.8 cm), High: 8” (20.3 cm)
Cable Requirements:
Belden #88760 or Alpha #55371
Maximum Wiring Length*:
1,000’ (305 m) field wiring
Multi-Drop Restriction:
16 per I.S. barrier channel (64 per barrier)
Connections:
Red = Power, Black = Signal, Shield = Ground