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A Safe Fleet Brand
Installation and Operation Manual
7
Electronic Component Installation
and Hook-Up
The schematic on pages 9 and 10 show how to wire the
electrical components for both the DC truck-mounted
system and the AC portable system.
Some things to keep in mind:
Do not hook up main power until all connections
have been made and are tight.
Use the recommended wire gauge specified
or larger.
The system can only perform when electrical
connections are sound, so make sure each one
is correct and tight.
Do not mount radio transmitter or transmitter cables
in direct or close contact with the system wiring.
CAUTION: Always disconnect the power and
ground connections before electric arc welding at
any point on the apparatus. Failure to do so will
cause damage to electrical components.
Use of standard automotive wire of the size specified
on the schematic that is grease and fuel resistant is
recommended.
CAUTION: Low battery voltage or voltage drop may
cause the system to malfunction. Provide power
from a master switch terminal. Accessories, such as
pump primers and lights, may cause voltage drops
when ac ti vat ed. Do not place such accessories on
the same circuit.
FOAM TANK LEVEL SENSOR
A foam tank level sensor must be mounted into the top
of the foam tank to monitor full concentrate condition.
A side-mount tank level sensor is supplied with the
system. If this sensor cannot be used in the apparatus
being built, a top/bottom mount sensor is available
(p/n 2510-0028).
8
Top Mount
(Optional)
Bottom Mount
(Optional)
The side-mount tank level sensor has 1/2-inch NPT
threads and must be installed as close to the top of
the foam tank as possible. After installation, the sensor
must be sealed with a suitable sealant to prevent
concentration leakage. Check the side-mount sensor
with a powered test light. With no or low level of
chemical in the tank, the test light should be off. With a
full tank, the light should be on. If the light does not come
on when the tank is full, reposition the sensor until the
light illuminates. Reseal the switch to prevent leakage.
A top/bottom mount sensor is available. The sensor has
1/8-inch NPT threads. Mount the sensor in the top of the
foam tank in a vertical position. Use suit able sealant to
prevent concentrate leakage. There must be room above
the tank to route the cable back to the control unit.
Check the tank level sensor with a powered test light.
With no foam in the tank, the switch con tacts should
be open and the test light should be off. If this is not
the case, remove the clip from the end of the low-level
sensor. Remove the float and reinstall 180° out of
position.
NOTE: Failure to install low-level switches will void
the FoamPro warranty.
Side-Mount
Tank Sensor
(Standard)
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