Spectra Watermakers LB-1800C, Installation And Operating Manual

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The optional Tank Level sensor allows even greater control of your ship ’ s fresh water
systems. This unique level monitoring system requires no holes to be drilled into your
tank while measuring tank volume with greater accuracy than a standard resistive float.
Turn off the ship ’ s domestic water system, close the fresh water supply valve at the
water tank, then bleed off the pressure by opening a tap in the galley or head sink.
Install a tee in the water supply hose at the bottom of the tank, or at the inlet to
the domestic water pump . Connect open leg of the tee to the Tank Level Sensor.
Note: The tank level sensor requires a 1/4” npt connection. We recommend installing
a minimum 1/2” tee, and using a reducing bushing to connect the sensor.
Tank Level
Sensor
Fresh Water
Tank
Product Water
Pump
Route the 3 conductor cable back to the Spectra Connect control board at the feed
pump module. Extend the wires as necessary. If you must extend the wires beyond
50’ contact the factory to ensure proper operation.
Connect the Tank Level Sensor cables to the appropriate terminals in the Control
Junction Box (pg. 10) and refer to the wiring diagram on pg.49 to identify the correct
terminals . Polarity must be maintained!
If a 2nd Tank Level Sensor is going to be installed, it should be installed at the base of
the second tank. If monitoring 2 connected water tanks, they must be isolated
from each other with a valve to read properly.
The wiring connections for the second Tank Level Sensor are located inside the Spec-
tra Connect control box. See System Settings section of this manual for instruc-
tions on enabling the second Tank Level Sensor.
See the Tank Level Calibration (pg. 17) in the Commissioning section of this
manual.
Optional Tank Level Sensor Installation
Note: Be sure the pipe between the tank and the tank lev-
el sensor is large enough to eliminate pressure drop when
the product pump is running.