Taco Electronic Solutions iWorX SMS-1 User manual

1
SUPERSEDES: New EFFECTIVE: October 28, 2011
Plant ID: 001-4047
Inventory
Part No. Item Description
SMS-1 SMS-1 Assembly and Accessories (with 60’ leads)
SMH-1 SMH-1 Pavement Sensor Housing
502-035 Installation Manual (this document)
Duct Seal, 1 lb. (inc. with SMS-1)
Screw, Set, Hex Socket, 3/8-16, 0.25″ L (Qty 3) (inc. with SMS-1)
Screw, Machine, S-BH-SS, #8-32, 0.375 L (Qty. 3) (inc. with SMS-1)
Hex L-Key, 3/16 (inc. with SMS-1)
NOTE: The SMS-1 Sensor requires Pavement Sensor Housing SMH-1.
Installation
Sensor Housing
Locate the pavement-mounted sensor carefully. The location should be:
• Centered between runs of hydronic tubing or heater cable;
• Exposed to precipitation and pedestrian or vehicular traffic; and
• Away from external heat sources in excess of 185° F. (85° C.).
The SMS-1 sensors can be located up to 2,000 feet (609.6 meters) from the associated
system controls. Use 4-conductor #18 AWG jacketed cable for distances up to 500 feet
(152.4 meters). Use #12 AWG for greater lengths. Insulate and waterproof all splices.
The sensor plate ships without the sensor housing. Before installing the sensor housing
remove the sensor plate, placing the sensor plate and the three machine screws where they
will not be lost or damaged.
Install the sensor housing on a firm, smooth surface such as a precast patio block or similar
masonry module. Refer to Figure 1. Care should be exercised in adjusting the final grade
and level of the sensor to ensure that the sensor surface will be flush with the finished
pavement, and that the adjacent pavement be either level or slightly crowned. A sensor
submerged in puddled water will not function properly. To stabilize the final location of the
sensor prior to paving, insert lengths of reinforcing rod or similar dowels on opposite sides
Use the plastic cover supplied with the SMH-1 to protect the sensor housing during
paving. The sensor plate should not be installed until after paving is complete and the plastic
cover is removed. Caulking may be required between the sensor housing and the paved
surface.
502
-
035
© 2011 Taco Electronic Solutions, Inc.

Conduit
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Wiring
The SMS
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
output wi
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Conduit
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Wiring
The SMS
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
output wi
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Conduit
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Wiring
The SMS
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
output wi
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Conduit
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Wiring
The SMS
-
1 is
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
output wi
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Conduit
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
1 is
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
watertight. Do not sha
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
depressed under these joints, as necessary.
Figure 1. INSTALLATION DIAGRAM.
furnished with 60’ (18.29m) 4
-
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
the sensor against possible ice damage. Refer back to Figure 1.
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
Figure 1. INSTALLATION DIAGRAM.
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
conductor jacketed #18 AWG field leads. The
unswitched 24 VAC power supply is connected across red and black wires
—
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
conductor jacketed #18 AWG field leads. The
—
black being
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
conductor jacketed #18 AWG field leads. The
black being
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
sensor housing leaving enough space for the sensor electronics and wiring. Prope
rly used,
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
conductor jacketed #18 AWG field leads. The
black being
the grounded conductor. Output relay NO contact connections are made via the two relay
res without discrimination. These are white, green, yellow, orange, or blue.
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
rly used,
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
expansion or control joints. For sensors embedded in slab on grade, conduit should be
conductor jacketed #18 AWG field leads. The
black being
the grounded conductor. Output relay NO contact connections are made via the two relay
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
rly used,
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
Use individual 3/4" (20 mm) rigid conduit for the entire installed length of the sensor cable,
taking care to ensure that all embedded or outdoor couplings and terminations are made
re conduit with other wiring. Do not route conduit across pavement
conductor jacketed #18 AWG field leads. The
black being
the grounded conductor. Output relay NO contact connections are made via the two relay
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
rly used,
the duct sealant will minimize the accumulation of water and ice in the housing and protect
Next, place wiring and electronics into the housing. Check for alignment between the sens
or
and pavement surfaces. If the sensor and pavement are not aligned, remove sensor from
2
After wiring the sensor, kneed the supplied duct sealant till pliable. Pack duct sealant into the
or

3
housing and adjust housing flange. The flange can be raised up to 0.63"(16 mm) to allow
sensor surface to be aligned with pavement surface. A low sensor will pool water and not
function properly. See Figure 2 for a schematic diagram of the sensor wiring.
Figure 2. SMS-1 WIRING SCHEMATIC DIAGRAM.
Note that Relay Wires 1+2 may be any color but black and red.
Install all cable leads through conduit as indicated in the Conduit section. Make sure that all
cable runs greater than 60’ are spliced together in a junction box or in another water-tight
location.
Testing
Should paving material or other residue be adhered to the sensing elements, clean the
surface with a ScotchTM Brite Pad. Do not use metallic or course abrasives or detergents.
Thoroughly check the system before placing it in service. Our experience shows that
installation errors cause the majority of problems. Frequently encountered problems include
wiring errors and improper waterproofing. Simple electrical tests and visual inspections
identify these problems.
Independent of weather conditions, the functional operation of an installed SMS-1 sensor
may be determined using a digital voltmeter (DVM) and water in the following manner:
1. If you do not wish to actually energize the snow/ice melting system as a result
of this procedure, disconnect the two relay output wires from the associated control
system. The relay output wires are white, green, or yellow.
2. With the DVM set to the 100 VAC range, verify the sensor supply voltage by
connecting the negative (-) test lead to the sensor black wire and the positive (+) test
lead to the sensor red wire. A DVM reading between 22 and 28 volts is acceptable.
3. Remove both test leads and connect across the relay output wires. These can be
white, yellow, green, orange, or blue.
4. Set DVM to read continuity. There should be an open circuit across the relay wires.
5. Place ice and water atop the sensor or apply freeze spray to the sensor and allow 0 to
5 minutes before observing a closed, short circuit between the relay output wires.
6. With satisfactory results, disconnect the DVM and restore all wiring connections.
RED 24 VAC
RELAY WIRE 1
BLACK 24 VAC RTN
RELAY WIRE 2
4-conductor jacketed cable
to iWorx Controls
SMS
-
1 Internal Control Wiring
INT GND
K1
Internal
Snubber
Circuit

4
REPRESENTATIONS AND WARRANTIES
This Document is subject to change from time to time at the sole discretion of Taco Electronic Solutions, Inc. All
updates to the Document are available at www.taco-hvac.com. When installing this product, it is the reader’s
responsibility to ensure that the latest version of the Document is being used.
iWorx® products shall only be used for the applications identified in the product specifications and for no other pur-
poses. For example, iWorx® products are not intended for use to support fire suppression systems, life support sys-
tems, critical care applications, commercial aviation, nuclear facilities or any other applications where product failure
could lead to injury to person, loss of life, or catastrophic property damage and should not be used for such purposes.
Taco Electronic Solutions, Inc. will not be responsible for any product or part not installed or operated in conformity
with the Document and instructions or which has been subject to accident, disaster, neglect, misuse, misapplication,
inadequate operating environment, repair, attempted repair, modification or alteration, or other abuse. For further
information, please refer to the last page of this Document for the company’s Limited Warranty Statement, which is
also issued with the product or available at www.taco-hvac.com.
LIMITED WARRANTY STATEMENT
Taco Electronic Solutions, Inc. (TES) will repair
or replace without charge (at the company's
option) any product or part which is proven
defective under normal use within one (1) year
from the date of start-up or one (1) year and six
(6) months from date of shipment (whichever
occurs first).
In order to obtain service under this warranty, it
is the responsibility of the purchaser to
promptly notify the local TES stocking distribu-
tor or TES in writing and promptly deliver the
subject product or part, delivery prepaid, to the
stocking distributor. For assistance on warranty
returns, the purchaser may either contact the
local TES stocking distributor or TES. If the
subject product or part contains no defect as
covered in this warranty, the purchaser will be
billed for parts and labor charges in effect at
time of factory examination and repair.
Any TES product or part not installed or oper-
ated in conformity with TES instructions or
which has been subject to accident, disaster,
neglect, misuse, misapplication, inadequate
operating environment, repair, attempted
repair, modification or alteration, or other
abuse, will not be covered by this warranty.
TES products are not intended for use to sup-
port fire suppression systems, life support sys-
tems, critical care applications, commercial
aviation, nuclear facilities or any other applica-
tions where product failure could lead to injury
to person, loss of life, or catastrophic property
damage and should not be sold for such pur-
poses.
If in doubt as to whether a particular product is
suitable for use with a TES product or part, or
for any application restrictions, consult the
applicable TES instruction sheets or in the U.S.
contact TES at 401-942-8000 and in Canada
contact Taco (Canada) Limited at 905-564-
9422.
TES reserves the right to provide replacement
products and parts which are substantially
similar in design and functionally equivalent to
the defective product or part. TES reserves the
right to make changes in details of design, con-
struction, or arrangement of materials of its
products without notification.
TES OFFERS THIS WARRANTY IN LIEU OF
ALL OTHER EXPRESS WARRANTIES. ANY
WARRANTY IMPLIED BY LAW INCLUDING
WARRANTIES OF MERCHANTABILITY OR
FITNESS IS IN EFFECT ONLY FOR THE
DURATION OF THE EXPRESS WARRANTY
SET FORTH IN THE FIRST PARAGRAPH
ABOVE.
THE ABOVE WARRANTIES ARE IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
STATUTORY, OR ANY OTHER WARRANTY
OBLIGATION ON THE PART OF TES.
TES WILL NOT BE LIABLE FOR ANY SPE-
CIAL, INCIDENTAL, INDIRECT OR CONSE-
QUENTIAL DAMAGES RESULTING FROM
THE USE OF ITS PRODUCTS OR ANY INCI-
DENTAL COSTS OF REMOVING OR
REPLACING DEFECTIVE PRODUCTS.
This warranty gives the purchaser specific
rights, and the purchaser may have other rights
which vary from state to state. Some states do
not allow limitations on how long an implied
warranty lasts or on the exclusion of incidental
or consequential damages, so these limitations
or exclusions may not apply to you.
ONTROLS ADE ASY®
Taco Electronic Solutions, Inc., 1160 Cranston Street, Cranston, RI
02920 Telephone: [phone] FAX: [phone].
Taco (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8.
Telephone: [phone]. FAX: [phone].
Taco Electronic Solutions, Inc. is a subsidiary of Taco,
Inc. Visit our web site at: http://www.taco-hvac.com
Printed in the USA iWorx® and iView® are registered trademarks of Taco Electronic Solutions, Inc.
© 2011 Taco Electronic Solutions, Inc.