ETI SNOW SWITCH PAVEMENT SENSOR User manual

South Bend, Indiana USA | networketi.com PAVEMENT SENSOR INSTALLATION MANUAL | PART NO. 23974 REV A
GENERAL GUIDELINES
1. To provide the greatest installation exibility, it is advised to use
at least three or four sensor housing units per paved slab, even
though not all housing units will contain an actual sensor.
2. When the pavement heating coil is laid out prior to paving,
make sure the sensor housing units are clear of the heating coil.
Do not locate a sensor housing box on top of any of the actual
heating coil.
3. Because there are two ports on the bottom of each sensor
housing unit, dig a little trench slightly deeper underneath each
of the housing units to accommodate those ports.
4. Read all enclosed product information sheets for more information.
5. For applications using asphalt paving, it is necessary to use a
concrete pill box. Ideally, conduit and the pavement sensor
housing should be installed as normal. At this time, the sensor
should not be installed and the plastic cap should be installed
in the pavement sensor housing. Frame an 8” x 8” or larger box,
level with the nal pavement height. Fill around the pavement
sensor housing with concrete. Allow the concrete to cure as per
the concrete manufacturer’s instructions before laying asphalt.
This installation method can also be used with other pavement
applications where it may be difcult to form the paving material
to the pavement sensor housing; e.g., paver block driveways
and patios.
PACKING LIST
Part Number Description
23974 Installation Sheet (this document)
23977 Pavement Sensor Housing Assembly
PAVEMENT SENSOR
AUTOMATIC SNOW/ICE MELTING SYSTEM CONTROL PANEL

South Bend, Indiana USA | networketi.com PAVEMENT SENSOR INSTALLATION MANUAL | PART NO. 23974 REV A
2
INSTALLATION INSTRUCTIONS
1 Lay out the sensor housing units or oor boxes
according to your plan for the size and shape of the
pavement area and trafc overow area.
2. Using a screwdriver or similar tool, remove the
desired knockout seal(s) from the oor boxes. They
won’t all be used. Knock out one of the two bottom
seals in each oor box, as well, for greater stability as
described in step 5 below.
3. With the cap off, rotate each of the three height
adjustment screws to the left to raise the height
adjustment ring between an 1/8 and a 1/4 of an
inch. Put caps back on housing units using the three
retaining screws from the accessory kit.
4. Once the adjustment ring has been raised, apply a
layer of grease to the outside of the sensor housing
body underneath the height adjustment ring. Also
apply grease to the adjustment ring itself. Applying
plenty of grease ensures the continued and proper
operation of the height adjustment ring after the
pavement sets up and cures.
5. Run PVC conduit between the oor box ports opened
in step 2, as well as one for the control box wiring.
Use PVC glue to secure the PVC conduit in place
inside each housing unit port. If not being used for
wiring, it is recommended one of the two bottom
ports be used as a drain with a short piece of conduit
extending down past the concrete into sand or gravel.
This promotes draining and provides greater stability
for each oor box. Refer to Figure 1.
6. As the paving material is poured and sets up,
make sure the caps of all of the housing units are
ush with the pavement. There must be no paving
material on the caps of the housing units. Adjust the
height ush with the pavement by using the height
adjustment ring.
7. To install a sensor into a housing unit, rst select
the sensor housing unit to be tted with the sensor.
If more than one housing unit has been placed as
part of the installation, itis best to select the one it is
believed will be closest to thecenter of the trafc or
snow build-up pattern(s).
8. The next step will be to remove the housing cap and
install the actual sensor. Refer to the documentation
accompanying the sensor for further instructions.
QUESTIONS AND COMMENTS
For technical help, questions, or comments concerning
this or any Environmental Technology, Inc. product,
contact the Customer Service Department between 8:00
a.m. and 5:00 p.m. EST.
E-mail: [email protected]
LIMITED WARRANTY
ETI’s two year limited warranty covering defects in
workmanship and materials applies. Contact Customer
Service for complete warranty information.
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to the contents of this publication or the products that
it describes, and specically disclaims any implied
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purpose. Environmental Technology, Inc. reserves the
right to revise this publication, and to make changes
and improvements to the products described in this
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