WarmlyYours WHCA-120-0043 Installation Manual

Installation Manual for
Snow Melting Systems
24/7 Installation Support • Free Design Service • www.WarmlyYours.com • (800) 875-5285
Contents
1.0 Product Specifications
1.0 Product Specifications ....................................................................................................... 1
WarmlyYours Heating Cable is designed for outdoor driveways, walkways, stairs and
patios. It is well suited for large areas like driveways.
2.0 Selection of the Heating System.......................................................................................... 2
The Heating Cable is comprised of a dual, multistrand heating element with a primary
insulation of Fluoropolymer. The insulated core is then protected with a woven metal
braid and an outer jacket of PVC, EPR or Zero Halogen Polyolefin based compound
to make it sturdier and to provide corrosion protection. These cables are terminated
with 20’ (6.1m) for 120V/240V or 50’ (15.2m) for 208V/277V long standard cold leads.
The hot and cold junction is uniquely designed to make it 100% fool proof.
3.0 Important Instructions before Installing the System............................................................ 2
4.0 Installation for Snow Melting ............................................................................................... 3
4.1 Control of Snow Melting System ............................................................................... 3
4.2 Electrical Provisions for the System........................................................................... 3
4.3 Installation under Asphalt........................................................................................... 4
4.4 Installation under Concrete........................................................................................ 5
4.5 Installation in mortar under Pavers............................................................................. 6
4.6 Installation of Snow Melting Mat................................................................................ 7
The Snow Melting Mat is a cable in mat (1.25” x 1.25” mesh openings) construction
which consists of the Heating Cable taped on a Polypropylene (PP) mat. The Heating
Cable is laid in a serpentine fashion so that it is equally spaced and distributed on
the (PP) mat.
5.0. Testing the Mats and Cable................................................................................................. 8
5.1 Test One: Insulation Resistance................................................................................. 8
5.2 Test Two: Total Cable Resistance............................................................................... 8
Available in a wide range of capacities and sizes to suit your requirements, the Snow
Melting Mats and Heating Cables are identified as indicated below.
6.0 Warranty............................................................................................................................... 8
7.0 Appendix
Appendix A: WarmlyYours Snow Melting Mats and cable charts............................................... 9-10
Appendix B: Cross-Section of Snow Melting Cable in Asphalt.................................................. 11
Appendix C: Cross-Section of Snow Melting Cable in Concrete................................................ 12
Appendix D: Cross-Section of Snow Melting Cable in Mortar Under Pavers............................. 13
Appendix E: Cross-Section of Snow Melting Cable in Stairs...................................................... 14
Appendix F: WarmlyYours Snow Melting System Diagram Premium 240V................................ 15
Appendix G: WarmlyYours Snow Melting System Diagram Premium 277V............................... 16
Appendix H: WarmlyYours Snow Melting System Diagram Premium 208V............................... 17
Appendix I: WarmlyYours Snow Melting System Diagram SCA-120-SS.................................... 18
Appendix J: WarmlyYours Snow Melting System Diagram Economy 240V............................... 19
Appendix K: WarmlyYours Snow Melting System Diagram Economy 277V............................... 20
Appendix L: WarmlyYours Snow Melting System Diagram Economy 208V............................... 21
Appendix M: WarmlyYours Snow Melting System Diagram Manual 240V................................. 22
Appendix N: WarmlyYours Snow Melting System Diagram Manual 277V.................................. 23
Appendix O: WarmlyYours Snow Melting System Diagram Manual 208V.................................. 24
Appendix P: WarmlyYours Snow Melting System Diagram SCA-DUAL 240V............................ 25
Appendix Q: WarmlyYours Snow Melting System Diagram SCA-DUAL 277V............................ 26
Appendix R: WarmlyYours Snow Melting System Diagram SCA-DUAL 208V............................ 27
Appendix S WarmlyYours Snow Melting System Diagram SCA-DUAL No Relay 240V............. 28
Appendix T: WarmlyYours Snow Melting System Diagram SCA-DUAL No Relay 208V............. 29
Appendix U: WarmlyYours Snow Melting System Diagram SCA-DUAL w/Relay 240V.............. 30
Appendix V: WarmlyYours Snow Melting System Diagram SCA-DUAL w/Relay 277V.............. 31
Appendix W: WarmlyYours Snow Melting System Diagram SCA-DUAL w/Relay 208V............. 32
Appendix X Expansion and Control Joint Cross Section............................................................ 33
Appendix Y: Junction Box Mounting........................................................................................... 34
Item Number: AAAA-BBB-CCCC
Ex: Item Number: WHMA-240-0250
(product type)
(width & length = 2’x50’)
• A
AAA = WHMA for Snow Melting Mat, WHCA for Snow Melting Cable
• BBB = Operating Voltage available in 120V, 208V, 240V and 277V
• C
CCC = Mat width in ft. (first two digits) and Mat length in ft. (third and fourth
digits) for Snow Melting Mat, Cable length in ft. for Snow Melting Cable
The available sizes of Snow Melting Mats are shown in Appendix A. The available
lengths of Snow Melting Cables are shown in Appendix B. Both Appendices include
the following attributes for each Item Number.
•
•
•
•
•
•
•
•
8.0 Troubleshooting.................................................................................................................... 35
9.0 Warranty Registration........................................................................................................... 37
(voltage)
1
Product Type
Operating Voltage
Cable Length
Mat Width and Length
Total Ohms
Total Watts
Watts/Ft for Cable or Watts/Sq Ft for Mats
Amps
2.0 Selection of the Heating System
6. D
o not install the Heating Cable below 5˚ F (-15˚ C) ambient temperature.
Install Chart
8. M
inimum spacing of Cables is 3” (76 mm) and maximum spacing of Cables is 3.5”
(89 mm). As spacing distance of wire increases, watts per square foot decrease.
7. M
inimum bending radius of the Heating Cable shall not be less than 10 times
its diameter.
Selection of your Heating System will depend on the application. The following can
be taken as a general guide:
Application
Watts per Sq.Ft. (per Sq.M.)
- Cable spacing inches (mm)
Multiplier at
given spacing
Outdoor Snow Melting
45 to 55 W/ft2 (484 to 592 W/m2)
Recommended spacing 3” (76mm).
4.0 at 3” (76mm)
9. T
win Conductor Heating Cable has a ground braid (metal sheath) to be connected to
ground and 2 conductors which are to be connected to the power supply.
10. D
ouble check the voltage and wattage of the Heating Cable received against the
project specifications on your custom installation plan. These are marked on the
packing box of the product. A qualified electrician should connect the Heating
System.
Formula: Area of Application x Multiplier at given cable spacing = Heated Cable
Length required
Example 1 (English): 100 sq.ft of Outdoor Snow Melting x 4.0 at 3” spacing = 400
feet of Heated Cable required
Example 2 (Metric): 9.3 sq.m of Outdoor Snow Melting x 4.0 at 76mm spacing =
122m of Heated Cable required
11. A
digital Ohm meter and a Megohmmeter (Insulation Tester) will be needed
to properly install the system. Check the continuity, resistance and insulation
resistance of the Heating Cable before installing and also after installing. Resistance
value should match the value shown in Appendix A on page 9 & 10. A tolerance of
-5% to +10% is allowed. Insulation resistance should be infinity.
12. K
eep high voltage power wires in a separate conduit from low voltage wires.
Please note the above-indicated values are meant as a general guide. Your values
may vary depending on a number of factors. Please consult your Account Manager
for assistance.
13. A
llow sufficient drying or curing period of the concrete / asphalt after installing the
Heating System and before energizing the Heating System.
14. F
or easy reference, affix a label at the power distribution board indicating the
location of the heating units installed.
3.0 Important Instructions before
Installing the System
15. T
he National Electric code requires that the heating cables be installed over a base
of at least 2” of substantial masonry or asphalt, and have at least 1.5” of the same
installed over the cable. Our recommendations are based on these NEC standards.
1. H
eating Cable must not cross or overlap itself at any point. This could cause the
Cable to overheat, requiring replacement.
WARNING
2. T
he Heating Cable length should not be cut or altered under any circumstances. This
may cause over-heating resulting in damage to the Cable.
16. T
he Cable must NOT be shortened or cut in any manner or subjected to strain at
the splice joint.
3. T
he cold lead can be cut or extended with a conventional splice, inside of an
accessible junction box (weatherproof if outdoors).
17. N
EVER power-up Heating Cables prior to being buried in concrete, asphalt or
in mortar (even for testing purposes). This will prevent premature failure of the
Heating Cable.
2.5” in (6.3cm)
maximum
4. T
ake precautions to avoid damage to Heating Cable during installation.
Do not
drive
thickness brick or concrete
over cable. Duct tape the ends of shovels. Do NOT saw expansion joints, without
paver
having lines marked off clearly with spray paint, where installer has verified that
Heating Cables will not be cut. Do NOT damage Cables with heavy equipment,
1.5” sand, stone
machinery or vehicles. Do not walk on splices, do not bend splices.
dust or mortar
5. H
eating Cables should be separated from other heat sources such as luminaries
and chimneys.
2” (5 cm)
2
Heating Cable must not cross or overlap itself at any point.Right
hot/cold joints 6
This could cause the Cable to overheat, requiring replacement.
in (15 cm) apart
and 6 in (15 cm)
from slab edge
Wro
hot/
inst
st
slab
8”-12” crushed
rock aggregate
Control joint
Concrete
4.0 Installation for Snow Melting
astic tie wrap
t
4.1 Control of Snow Melting System
CONTROL
PANEL
Heating cable secured to
rebar with plastic tie wraps
4.2 Electrical Provisions for
the Systems
3”
P Ncables
E
The National Electric Code requires that the heating
and mats must be
Steel bar
3”
supplied power by a GFEP (30mA) protected
circuit.
THERMOSTAT
The Snow Melting system installation wiring shall be in accordance with the National
Topping 2 in (5.0 cm)
Electric Code and prevailing local codes.
minimum to 3 in (7.5 cm)
maximum thickness
Heating cable secured to
rebar withcable
plastic tie
wraps
The snow / moisture sensor
and
the Heating Cable cold leads shall
be routed
FLOOR
Dimension B must not
to the power connection box in separate conduits.
exceed 6 in (15 cm)
B
Dimension A must not
HEATING
SENSOR
Steel bar
exceed 3 in (7.5 cm)
CABLE
Breaker Size (Amps)
Max Design Load
(Amps)
A
40
32
30
24
16
SNOW MELT MAT
15
SNOW
SENSOR
3”
A control suitable for Snow Melting systems with pavement mounted or aerial
mounted sensor should be used for Snow Melting applications, when not using a
Expansion joint
Concrete
Timer.
20
120 VAC SUPPLY
3”
12
C
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
RELAY
HOUSE
J-BOX
ast 4 in
m edge
DRIVEWAY
3
120 VAC
240 VAC
277 VAC
SUPPLY
RELAY
PANEL
SLAB TEMP HIGH
LIMIT SENSOR
(IF APPLICABLE)
SNOW MELT MAT AND CABLE
4.3 Installation under Asphalt
4c. When the binder coat is in place, it is sometimes easier (especially when installing
tire track coverage) to have one person hold the roll of heating mat (wire side
down) as hot asphalt is shoveled over it. as the area is covered the installer
slowly unrolls the product until the remaining area is completed.
1. Ensure that the paving contractor has a solid base of 4” to 8” (102 mm to 203
mm) of crushed rock aggregate tamped down and ready to receive the asphalt.
2. It is extremely important that the paving installer does NOT use any heavy
equipment, machinery, or vehicles over the exposed Heating Cable. Any tracked
mechanical spreaders or dump trucks must be prohibited from running over
exposed Heating Cable.
5. O
nce the heater cables are in place, the electrician must route the cold lead(s),
(20’ (6.1m) for 120V/240V or 50’ (15.2m) for 208V and 277V provided per each
Mat/Cable) through rigid metal conduit(s) or other approved means, to get back
to an accessible weatherproof junction box(s). The electrician may supply
junction boxes which can be accessed from above, so the rest of the box is
buried to avoid damage by lawn mowers and/or vehicles. Care must be taken by
the electrician so that none of the heated section of Cable enters the conduit(s).
If a slab-mounted snow sensor will be used, this is the best time for placement.
It should be located in an open area, away from trees or bushes, so that snow
will easily fall directly on it. Separate conduit should be used to protect the low
voltage sensor wire and must NOT be shared with any high voltage cold lead from
the Heating Cables / Mats.
3. During this process of laying asphalt, installing the heating product, and
laying more asphalt, it is the responsibility of the electrician to use a 500 VDC
megohmmeter and a multi-meter to continuously check the Heating Cables that
are being worked on top of, to ensure they have not been damaged.
4a. The paving installer should lay down the binder / base coat of asphalt and roller it
smooth. The paving installer must decide if this binder coat of asphalt is allowed
to cool before finishing with the top coat of asphalt. This should be coordinated
with the installer of the Heating Cable or Mats. When working on top of hot
asphalt, please consider pre-making “wire mesh heating Mats”. This means
rolling out the reinforcing wire mesh (provided by electrician) and pre-attaching
the Heating Cable to it using wire ties (like rebar wire ties) that will not melt from
the hot asphalt. These “wire mesh heating Mats” could be left in the yard next
to the driveway while the first binder coat is poured. While the asphalt is still hot,
two people could carry / drag each “wire mesh heating mat” over the hot asphalt,
have it flipped over so that it is wire-side-down / mesh-side-up, and then staked
down to the hot binder coat (stakes provided by electrician).
6. Once the Heating Cables and conduits are in place, and are attached by the
methods listed, above the final top coat of asphalt may be poured. At least 2”
(51mm) of material must cover the Heating Cable. The paving installer will be
required to spread this around evenly with shovels and rakes. Shovels should be
duct taped so the blade ends are less sharp. Again, the topping coat should be
spread manually to avoid use of heavy machinery. The only time it is acceptable
to use a mechanical asphalt spreader would be when it can straddle tire track
coverage used for longer sloped driveways. Tire track coverage allows the
spreader machine to be used without it ever making any direct contact with the
Heating Cables.
4b. If the paving installer decides to let the binder / base coat of asphalt cool prior
to finishing with the top coat, then wire mesh is only needed for free-form type
Heating Cable installations. WarmlyYours Snow Melting Mats may be staked
down to the binder coat without using any wire mesh (stakes may only pierce the
black plastic mesh, and should never make direct contact with the Heating Cable
itself). Again, it’s recommended that the Snow Melting Mat be laid down so it
is wire-side-down / mesh-side-up, to help protect it from damage by shovels.
When installing free-form type Heating Cable, stake wire mesh down to the
binder / base coat first, and then attach the Heating Cable to it using wire ties.
This means it is wire-side-up / mesh-side-down, so extra care must be taken by
the paving installer to avoid damaging the Heating Cables with shovels or rakes
used to spread the top coat of asphalt.
7. O
nce the top coat of asphalt is spread over the Heating Cables evenly with at least
2” (51 mm) thick coverage, it may be rolled over with the steam roller to finish /
flatten the driveway. Again, each Heating Cable / Mat must be tested with a multimeter and 500 VDC megohmmeter to verify that they have not been damaged,
and to ensure they will be ready for activation (final test) after the asphalt has
cured. These values should be recorded on the warranty card on page 35.
4
4.4 Installation under Concrete
Mats. Once conduits & sensor(s) are placed, the topping pour of concrete can
be finished. Again, the concrete installer(s) must take care not to walk on the
hot-cold splice point, and to avoid damaging the Heating Cables with shovels
and rakes. Taping up the shovel blades helps make them less sharp. Like with
asphalt, it’s recommended that Mats be placed so the mesh faces up, keeping
the wire-side-down to help protect it from shovels.
1. Ensure that the concrete contractor has installed a solid base of 4” to 8” (102 mm
to 203mm) of crushed rock aggregate base and that it is tamped down and ready
for the concrete pour. The dimensions of the openings in the snow melt rolls are 1
1/4” x 1 1/4”. Use 3/4” or smaller aggregate in concrete when pouring over snow
melt rolls.
4b. F
or Single-Pour Installations: The wire mesh or rebar is first placed by the
concrete installer or electrician. The electrician then must attach the Heating
Cable to the rebar / mesh with plastic zip ties using 3” to 4” (51mm to 76mm)
spacing for free-form type cable. Then the rebar / mesh must be propped up
with concrete rubble, wire chairs, or brick pavers to the appropriate depth so that
Heating Cable / Mat ends up 2” to 3” (51mm to 76mm) from finished surface and
no deeper. Once rebar / mesh / Heating Cable is all propped up, the electrician
must route the cold leads(s) thru rigid metal conduit(s) or other approved means,
to get back to an accessible weatherproof junction box (es). Care must be taken
so that none of heated section enters any conduit. If a slab-mounted snow
sensor will be used, this is the best time for placement. It should be located in
an open area, away from trees or bushes, so that snow will easily fall directly on
it. Separate conduit should be used to protect the low voltage sensor wire and
must NOT be shared with any high voltage cold lead from the Heating Cables
/ Mats. Once conduits & sensor(s) are placed, the pour of the concrete can be
finished in one step. The concrete installer(s) must take care not to walk on the
hot-cold splice and to avoid damaging the Heating Cables with shovels and
rakes. Mats should be placed mesh facing up, keeping the wire-side-down, to
help protect it from the shovels and rakes.
2 . It is extremely important that the concrete installer does NOT use any heavy
equipment, machinery, or vehicles over the exposed Heating Cable. During
concrete pours, it is recommended that care be taken to avoid stepping on the
transition portion of cable, where the hot section (green) meets the cold section
(black). This is the location of the factory splice. During this process of installing
the heating product and pouring concrete, it is the responsibility of the electrician
to use a 500 VDC megohmmeter and a multi-meter to keep checking on the
Heating Cables that are currently being worked on top of, to ensure they have not
been damaged, and will be ready for action once the concrete slab has cured.
3. For installations in stairs and ramps that will include hand rails, it is strongly
recommended that the concrete installer pre-sleeve for the posts to avoid any
and all drilling of the concrete. The Heating Cable must be routed around these
sleeves or posts to avoid any direct contact with them. Heating Cables or Mats
must not be allowed to pass thru expansion joint locations. It is recommended
that lines are spray painted on the finished concrete surface by the electrician to
mark off exactly where expansion joints may be located. It is the responsibility of
the electrician and the concrete installer to coordinate their efforts so they avoid
saw-cutting or drilling thru Heating Cables that are no longer visible beneath the
concrete. Following the proposed installation plan from WarmlyYours will help to
ensure this process goes smoothly.
5. The electrician needs to complete final testing of all the Heating Cables / Mats
with a multi-meter and a megohmmeter to verify and record that each Heating
Cable has survived the pour of concrete and is ready for action once the concrete
is cured. These values must be recorded on the warranty card on page 35.
4a. For Two-Pour Installations: The concrete installer pours the first 2” to 3” (51mm
to 76mm) of concrete. While this first pour is still wet, rebar or wire-mesh should
be placed on top of the first pour. The Snow Melting Mats / Cables should be
attached to the rebar / mesh with plastic zip ties, using 3” to 4” (76mm to 102mm)
spacing for free-form type cable. At this time, the electrician must route the cold
lead(s) thru rigid metal conduit(s) or other approved means, to get back to an
accessible weatherproof junction box(es). Care must be taken by the electrician
so that none of the heated section enters any conduit. If a slab-mounted snow
sensor will be used, this is the best time for placement. It should be located in
an open area away from trees or bushes so that snow will easily fall directly on
it. Separate conduit should be used to protect the low voltage sensor wire and
must NOT be shared with any high voltage cold lead from the Heating Cables /
5
4.5 Installation under Pavers (Stone or Brick)
7. The paver installer(s) must take care not to walk on the hot-cold factory splice
and to avoid damaging the Heating Cables with shovels or rakes. Mats should
be placed mesh facing up, keeping the wire-side-down, to help protect them
from shovels.
1. Ensure that there is a solid base of 4” to 8” (102mm to 203mm) of crushed rock
aggregate base and that it is tamped down and ready to receive the mortar pour.
2. It is extremely important that the paver installer does NOT use any heavy
equipment, machinery, or vehicles over the exposed Heating Cable. During
the paver installation process, it is recommended that care be taken to avoid
stepping on the hot-cold factory splice portion of cable (green meets black).
It is the responsibility of the electrician to use a 500 VDC megohmmeter and
a multi-meter to continuously check on the Heating Cables that are currently
being worked on top of, to ensure they have not been damaged, and will be
ready for action once the mortar pour has cured.
8. The electrician needs to complete final testing of all the Heating Cables / Mats
with a multi-meter and a megohmmeter to verify and record that each Heating
Cable has survived the pour of mortar, and is ready for action once the mortar is
cured. These values must be recorded on the warranty card on page 35.
9. If sand or limestone screenings are used instead of mortar, avoid dropping
pavers onto the surface, as doing so may damage the heating cables.
WARNING
3. For installations in stairs and ramps that will include hand rails, it is strongly
recommended that the paver installer pre-sleeve for the posts to avoid any and
all drilling of the mortar. The Heating Cable must be routed around these sleeves
or posts to avoid any direct contact with them. It is the responsibility of the
electrician and the paver installer to coordinate their efforts so they avoid sawcutting or drilling thru Heating Cables that are no longer visible beneath the
mortar.
1. Brick and Stone Pavers must NOT be any thicker than 2.5” (63.5mm).
2. We do not recommend tire track coverage when using pavers
4. The paver installer or electrician should place wire mesh (like would be used
in concrete) down on top of the crushed rock aggregate. The mesh should be
staked down firmly to the crushed rock so it remains flat. Next, the Heating Cable
or Mats should be attached to the mesh using wire ties to maintain proper depth
and spacing, 3” (76mm) for free-form type Cable. Reference the WarmlyYours
custom installation plan provided with quotation so that this process goes
smoothly.
5. At this time, the electrician must route the cold lead(s) thru rigid metal conduit(s)
or other approved means, to get back to an accessible weatherproof junction
box(es). Care must be taken by the electrician so that none of the heated section
(green) enters any conduit. For this type of application, we recommend using
an aerial mounted snow sensor to avoid having to cut around a circular slab
mounted sensor (this could cause a trip hazard or premature paver crumble).
Once the conduit(s) is in place, the product is ready to receive the mortar pour
or sand, or limestone screenings.
6. Care must be taken by the paver installer so the mortar covers the Heating Cables
/ Mats and they will not make direct contact with the pavers. We recommend
that at least 1” (25mm) thick mortar is poured over the Heating Cables / Mats,
but no more than 1.5”(38mm). If using sand or limestone screenings, cover to an
uncompacted depth of 1.5” (38mm), leveled to grade.
6
4.6 Installation of Snow Melting Mat
Use scissors to cut the Mat. NEVER cut the Heating Cable
For 180 Degree Turn
Turn the Mat
Flip / Turn the Mat
180˚
For 90 Degree Turn
For other shapes, detach Cable from Mat to required
length and lay only Cable.
Means of attachment may vary
project to project.
90˚
Flip the
Mat Reverse
7
5.0 Testing the Mats and Cable
6.0 Warranty
5.1 Test One: Insulation Resistance
(Megohmmeter Required)
WarmlyYours provides a warranty for the Heating Cables for a period of 10 years
from date of purchase, covering the materials and workmanship under normal
operating conditions.
1. Connect one meter clamp to the cold lead (pigtail) inner conductors and the
other meter clamp to the metal cable braided sheath (ground) of the Heating
Cable.
In case of defective material, WarmlyYours obligation will be limited to the repair or
supply of new material, free of charge to the customer.
The warranty does not cover installations made by unqualified persons or faults
caused by incorrect design by others / misuse / damage caused by others /
damage in transit / incorrect installation and any other subsequent damage that
may occur. Costs related to repair / replacement will be fully chargeable to the
customer if the damage is due to of any of the above reasons.
2. Test in accordance with the meter manufacturer’s instructions. Recommended
meter is a 500 VDC megohmmeter.
3. Megohmmeter reading should read infinity.
4. Record measured values on the warranty card on page 36. Perform this test
before, during and after installation of the Heating Cables.
WarmlyYours is under no circumstances liable for consequential damages or losses
including without limitations the loss or profit arising from any cause whatsoever.
The guarantee is a material warranty only and does not cover field labor.
5.2 Test Two: Total Cable Resistance
(Multi-Meter Required)
The warranty is void if there is any payment default and if data is not filled in on
attached warranty card.
1. Connect one meter clamp to one cold lead (pigtail) inner conductor and the other
meter clamp to the other cold lead (pigtail) inner conductor.
2. Test in accordance with the meter manufacturer’s instructions and record this
ohm value on the warranty card on page 36.
3. Total nominal cable resistance information is found on the CSA label, the bill
of materials and Appendix A, or can be obtained by calling your WarmlyYours
Account Manager. Actual reading should be within -5% - +10% of the cable
resistance.
4. Record measured values on the warranty card on page 36. Perform this test
before, during and after installation of the Heating Cables.
5. Please be sure that you write in the full part number of the Cable or Mat next to
your results.
8
7.0 APPENDIX A:
WARMLYYOURS SNOW MELTING MATS (SUITABLE FOR ASPHALT, CEMENT AND UNDER PAVERS)
Part #
Size (ft/m)
Voltage
Area (ft2/m2)
Cable Length (ft/m)
Total Ohms
Total Watts
Watts/ft2 (W/m2)
Amps
WHMA-120-0205
2’ x 5’ (0.61 x 1.52m)
120
10.0 (.93m )
42.77 (13.04m)
28.80
500
50.00 (538W/m )
4.17
WHMA-120-0305
3’ x 5’ (0.91 x 1.52m)
120
15.0 (1.39m2)
62.78 (19.14m)
19.20
750
50.00 (538W/m2)
6.25
WHMA-120-0210
2’ x 10’ (0.61 x 3.05m)
120
20.0 (1.86m2)
85.54 (26.07m)
14.40
1,000
50.00 (538W/m2)
8.33
WHMA-120-0310
3’ x 10’ (0.91 x 3.05m)
120
30.0 (2.79m )
125.56 (38.27m)
9.60
1,500
50.00 (538W/m )
12.50
WHMA-120-0215
2’ x 15’ (0.61 x 4.57m)
120
30.0 (2.79m2)
128.31 (39.11m)
9.60
1,500
50.00 (538W/m2)
12.50
WHMA-120-0315
3’ x 15’ (0.91 x 4.57m)
120
45.0 (4.18m2)
188.34 (57.41m)
6.40
2,250
50.00 (538W/m2)
18.75
WHMA-240-0210
2’ x 10’ (0.61 x 3.05m)
240
20.0 (1.86m )
85.54 (26.07m)
57.60
1,000
50.00 (538W/m )
4.17
WHMA-240-0215
2’ x 15’ (0.61 x 4.57m)
240
30.0 (2.79m2)
128.31 (39.11m)
38.40
1,500
50.00 (538W/m2)
6.25
WHMA-240-0220
2’ x 20’ (0.61 x 6.10m)
240
40.0 (3.72m2)
171.08 (52.15m)
28.80
2,000
50.00 (538W/m2)
8.33
WHMA-240-0230
2’ x 30’ (0.61 x 9.14m)
240
60.0 (5.57m )
256.63 (78.22m)
19.20
3,000
50.00 (538W/m )
12.50
WHMA-240-0240
2’ x 40’ (0.61 x 12.19m)
240
80.0 (7.43m2)
342.17 (104.29m)
14.40
4,000
50.00 (538W/m2)
16.67
WHMA-240-0250
2’ x 50’ (0.61 x 15.24m)
240
100.0 (9.29m2)
427.71 (130.37m)
11.50
5,000
50.00 (538W/m2)
20.87
WHMA-240-0310
3’ x 10’ (0.91 x 3.05m)
240
30.0 (2.79m )
125.56 (38.27m)
38.40
1,500
50.00 (538W/m )
6.25
WHMA-240-0315
3’ x 15’ (0.91 x 4.57m)
240
45.0 (4.18m2)
188.34 (57.41m)
25.60
2,250
50.00 (538W/m2)
9.38
WHMA-240-0320
3’ x 20’ (0.91 x 6.10m)
240
60.0 (5.57m2)
251.12 (76.54m)
19.20
3,000
50.00 (538W/m2)
12.50
WHMA-240-0330
3’ x 30’ (0.91 x 9.14m)
240
90.0 (8.36m2)
376.68 (114.81m)
12.80
4,500
50.00 (538W/m2)
18.75
2
2
2
2
2
2
2
2
2
2
WARMLYYOURS SNOW MELTING CABLES (SUITABLE FOR ASPHALT, CEMENT AND UNDER PAVERS)
Part #
Voltage
Cable Length
Total Ohms
WHCA-120-0043
120
42.77’ (13.04m)
28.80
WHCA-120-0063
120
62.78’ (19.14m)
WHCA-120-0086
120
WHCA-120-0126
Watts/Ft
Amps
500
11.69 (38W/m)
4.17
19.20
750
11.95 (39W/m)
6.25
85.54’ (26.07m)
14.40
1,000
11.69 (38W/m)
8.33
120
125.56’ (38.27m)
9.60
1,500
11.95 (39W/m)
12.50
WHCA-120-0188
120
188.34’ (57.41m)
6.40
2,250
11.95 (39W/m)
18.75
WHCA-240-0086
240
85.54’ (26.07m)
57.60
1,000
11.69 (38W/m)
4.17
WHCA-240-0128
240
128.31’ (39.11m)
38.40
1,500
11.69 (38W/m)
6.25
WHCA-240-0171
240
171.08’ (52.15m)
28.80
2,000
11.69 (38W/m)
8.33
WHCA-240-0188
240
188.34’ (57.41m)
25.60
2,250
11.95 (39W/m)
9.38
WHCA-240-0251
240
251.12’ (76.54m)
19.20
3,000
11.95 (39W/m)
12.50
WHCA-240-0342
240
342.17’ (104.29m)
14.40
4,000
11.70 (38W/m)
16.67
WHCA-240-0377
240
376.68’ (114.81m)
12.80
4,500
11.95 (39W/m)
18.75
WHCA-240-0428
240
427.71’ (130.37m)
11.50
5,000
11.69 (38W/m)
20.87
9
Total Watts
WARMLYYOURS SNOW MELTING CABLES 208V (SUITABLE FOR ASPHALT, CEMENT AND UNDER PAVERS)
Part #
Voltage
Cable Length (feet)
Total Ohms
Total Watts
Watts/ft
Amps
WHCA-208-0100
208
100'
36.05
1,200
12
5.8
WHCA-208-0128
208
128'
28.28
1,530
11.9
7.4
WHCA-208-0171
208
171'
21.63
2,000
11.6
9.7
WHCA-208-0200
208
200'
18.03
2,400
12
11.6
WHCA-208-0251
208
251'
14.42
3,000
11.9
14.5
WHCA-208-0342
208
342'
10.82
4,000
11.6
19.3
WHCA-208-0377
208
377'
9.61
4,500
119
21.7
WARMLYYOURS SNOW MELTING CABLES 277V (SUITABLE FOR ASPHALT, CEMENT AND UNDER PAVERS)
Part #
Voltage
Cable Length (feet)
Total Ohms
Total Watts
Watts/ft
Amps
WHCA-277-0100
277
100'
63.94
1,200
12
4.4
WHCA-277-0128
277
128'
50.15
1,530
11.9
5.6
WHCA-277-0171
277
171'
38.36
2,000
11.6
7.3
WHCA-277-0200
277
200'
31.97
2,400
12
8.7
WHCA-277-0251
277
251'
25.58
3,000
11.9
10.9
WHCA-277-0342
277
342'
19.18
4,000
11.6
14.5
WHCA-277-0377
277
377'
17.05
4,500
11.9
16.3
WHCA-277-0428
277
428'
15.35
5,000
11.6
18.1
WHCA-277-0502
277
502'
12.79
6,000
11.9
21.7
10
APPENDIX B:
CROSS-SECTION OF SNOW MELTING CABLE IN ASPHALT
Outdoor Asphalt Snow Melt Application
Recommended Products: Snow Melt Rolls
2” to 3” (51mm to 76mm) of finished asphalt
3” (76m
m
Spacin )
g
Snow Melting Mat
1.5” to 2”(38mm to 51mm) of base/primer asphalt
4” to 8” (102mm to 203mm) of crushed rock aggregate base
Outdoor Concrete Snow Melt Application
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
2” to 3” (51mm to 76mm) of finished concrete
3” (76m
m
Spacin )
g
Heating Cable run(tied to rebar or wire mesh with plastic tie wra
Rebar
wire mesh
Note: Cables may be tied to reinforcement type mesh and then the mesh should be staked down
to the or
base/primer
pour.supported by bricks or metal chairs
(Heating Cable ties to rebar or wire mesh with plastic tie wraps)
Concre
te Bloc
11
2” to 3” (51mm to 76mm) of concrete
1.5” to 2”(38mm to 51mm) of base/primer asphalt
4” to 8” (102mm to 203mm) of crushed rock aggregate base
APPENDIX C:
SNOW MELTING MAT IN CONCRETE
CROSS-SECTION OF SNOW MELTING CABLE IN CONCRETE
Outdoor Concrete Snow Melt Application
3/4” Concrete aggregate
1 1/4” x 1 1/4” Squares
or smaller required
2” to 3” (51mm to 76mm) of finished concrete
3” (76m
m
Spacin )
g
Heating Cable run(tied to rebar or wire mesh with plastic tie wraps)
Rebar or wire mesh supported by bricks or metal chairs
(Heating Cable ties to rebar or wire mesh with plastic tie wraps)
Concre
te Bloc
k or M
2” to 3” (51mm to 76mm) of concrete
etal Ch
airs
4” to 8” (102mm to 203mm) of crushed rock aggregate base
Outdoor Paver Snow Melt Application
Plastic tie wrap
3” (76m
m
Spacin )
g
Brick and Stone Pavers must NOT be any thicker
4 in (10) or 6 in (15) square 10
than 2.5” (63.5mm)
gauge wire mesh
1” to 1.5” (25.4mm to 38mm) of finished mortar, sand or stone dust
12
Heating Cable run(tied to wire mesh with plastic tie wraps)
Wire mesh below the heating cables
Concre
te Bloc
k or M
2” to 3” (51mm to 76mm) of concrete
etal Ch
airs
4” to 8” (102mm to 203mm) of crushed rock aggregate base
APPENDIX D:
CROSS-SECTION OF SNOW MELTING CABLE IN MORTAR BED UNDER PAVERS
Outdoor Paver Snow Melt Application
Brick and Stone Pavers must NOT be any thicker
than 2.5” (63.5mm)
3” (76m
m
Spacin )
g
1” to 1.5” (25.4mm to 38mm) of finished mortar, sand or stone dust
Heating Cable run(tied to wire mesh with plastic tie wraps)
Wire mesh below the heating cables
(Heating Cables ties to wire mesh with plastic tie wraps)
4” to 8” (102mm to 203mm) of crushed rock aggregate base
Installation Support • 10 Year Warranty • (800) 875-5285 • www.WarmlyYours.com
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Note: Cables may be tied to reinforcement type mesh and then the mesh should be staked down to the base/crushed rock aggregate.
13
Heated Slab
Heated Slab
Heating cable secured
APPENDIX E:
to rebar with plastic tie
CROSS-SECTION OF wraps
SNOW MELT CABLE IN STAIRS
Pavers - No lip overhang
Pavers - No lip overhang
Steel bar
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
4’
Dimension B must not
exceed 3.5 in (8.9 mm)
Topping 2 in. (5.0 cm) 6’
minimum, to 3 in. (7.5 cm)
maximum thickness
4’
6’
B
Dimension A must not
exceed 3 in (7.5 cm)
A
Lip edge rounded off to
prevent cable damage
Splice
(12” from
If dimension
slab edge)
C
C exceeds 3
in(10 cm) an additional run
4” (splice
of cable must be used
to conduit)
Lip edge rounded off to
prevent cable damage
Cable must be at least 4 in
(10 cm) from side edge
Cable must be at least 4 in
(10 cm) from rail post
Splice
(12” from
slab edge)
5” - 6”deep
Estimators’
example:
Heating cable should
4” (splice
be tied
off to
with
zipdeep.
Stair treads
have
beplastic
11-12”
to conduit)
Cold leads protected with 3/4” diameter rigid metal
Landing ties
= 4’toxa6’heavy
= 24gauge
sq.ft X 4 = 96 FT
wire mesh
that has
been
other
approved means. The conduit
3 steps (12”
x 6’ each)
... we
want 4 passes ofconduit
cable or
per
tread.
staked down to the base.
be posts)
at the bottom of slab and coming into
Subtract 3” from each side (making room for should
hand rail
Heating cable should
5.5’ X 4 = 22 FT plus 3 FT = 25 FT per tread the slab approximately 6”
be tied off with plastic zip
3 FT is the amount needed for curves and tread riser.
Solution: 96 FT + 25 FT + 25 FT + 25 FT = 171 FT
Pick closest cable match = WHCA-240-0171
ties to a heavy gauge
wire mesh that has been
staked down to the base.
14
Cable must be at least 4 in
(10 cm) from side edge
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
APPENDIX F:
SNOW MELT DIAGRAM 240V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH PREMIUM CONTROL
Heater cable 20ft cold leads to be taken through
Installer may use more J-boxes
outside or inside building.
Inside
240V CIRCUITS
HEATER CABLE / MAT #1
240V CIRCUITS
240V
240V
HEATER CABLE / MAT #2
J-BOX
240V
120/240 VAC
BREAKER PANEL
Outside
3/4” (19mm) rigid metal conduit back to J-boxes.
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
240V
HEATER CABLE / MAT #4
240V
J-BOX
240V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120V
SWITCHED
POWER
Slab mounted temperature probe sensor
for high temp cut-off, to be housed inside
a 3/4” rigid metal conduit between two
passes of heater cable.
SCP-120
CONTROLLER
LOW VOLTAGE (24V)
LOW VOLTAGE (24V)
Aerial mounted snow sensor location
as per the installer.
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
AIR-SS
15
APPENDIX G:
SNOW MELT DIAGRAM 277V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH PREMIUM CONTROL
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
HEATER CABLE / MAT #1
277V CIRCUITS
HEATER CABLE / MAT #2
277V CIRCUITS
HEATER CABLE / MAT #3
J-BOX
RLY-12PL
RELAY PANEL
277 VAC
BREAKER PANEL
HEATER CABLE / MAT #4
HEATER CABLE / MAT #5
J-BOX
HEATER CABLE / MAT #6
HEATER CABLE / MAT #7
J-BOX
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
J-BOX
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
120V
SWITCHED
POWER
HEATER CABLE / MAT #12
(conduit size as per installer / local code requirements)
Slab mounted temperature probe sensor
for high temp cut-off, to be housed inside
a 3/4” rigid metal conduit between two
120V
CONTROL
POWER
120 VAC
BREAKER PANEL
passes of heater cable.
SCP-120
CONTROLLER
LOW VOLTAGE (24V)
LOW VOLTAGE (24V)
Aerial mounted snow sensor location
as per the installer.
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
AIR-SS
16
APPENDIX H:
SNOW MELT DIAGRAM 208V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH PREMIUM CONTROL
Heater cable 50ft cold leads to be taken through
Installer may use more J-boxes
outside or inside building.
Inside
208V CIRCUITS
HEATER CABLE / MAT #1
208V CIRCUITS
208V
208V
HEATER CABLE / MAT #2
J-BOX
208V
120/208 VAC
BREAKER PANEL
Outside
3/4” (19mm) rigid metal conduit back to J-boxes.
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
208V
HEATER CABLE / MAT #4
208V
J-BOX
208V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120V
SWITCHED
POWER
Slab mounted temperature probe sensor
for high temp cut-off, to be housed inside
a 3/4” rigid metal conduit between two
passes of heater cable.
SCP-120
CONTROLLER
LOW VOLTAGE (24V)
LOW VOLTAGE (24V)
Aerial mounted snow sensor location
as per the installer.
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
AIR-SS
17
APPENDIX I:
SNOW MELT DIAGRAM 240V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH ECONOMY CONTROL
Heater cable 20ft cold leads to be taken through
Installer may use more J-boxes
outside or inside building.
Inside
HEATER CABLE / MAT #1
240V CIRCUITS
240V CIRCUITS
240V
240V
HEATER CABLE / MAT #2
J-BOX
240V
120/240 VAC
BREAKER PANEL
Outside
3/4” (19mm) rigid metal conduit back to J-boxes.
HEATER CABLE / MAT #3
RLY-12PL
RELAY PANEL
240V
HEATER CABLE / MAT #4
240V
J-BOX
240V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120V
SWITCHED
POWER
SLAB-SS
SCE-120
CONTROLLER
LOW VOLTAGE (24V)
19
Slab mounted snow sensor, located
between two passes of Heating Cable.
APPENDIX J:
SNOW MELT DIAGRAM 277V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH ECONOMY CONTROL
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
HEATER CABLE / MAT #1
277V CIRCUITS
HEATER CABLE / MAT #2
277V CIRCUITS
HEATER CABLE / MAT #3
J-BOX
RLY-12PL
RELAY PANEL
277 VAC
BREAKER PANEL
HEATER CABLE / MAT #4
HEATER CABLE / MAT #5
J-BOX
HEATER CABLE / MAT #6
HEATER CABLE / MAT #7
J-BOX
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
J-BOX
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
HEATER CABLE / MAT #12
120V
SWITCHED
POWER
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120 VAC
BREAKER PANEL
SLAB-SS
SCE-120
CONTROLLER
LOW VOLTAGE (24V)
20
Slab mounted snow sensor, located
between two passes of Heating Cable.
APPENDIX K:
SNOW MELT DIAGRAM 208V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH ECONOMY CONTROL
Heater cable 50ft cold leads to be taken through
Installer may use more J-boxes
outside or inside building.
Inside
HEATER CABLE / MAT #1
208V CIRCUITS
208V CIRCUITS
208V
208V
HEATER CABLE / MAT #2
J-BOX
208V
120/208 VAC
BREAKER PANEL
Outside
3/4” (19mm) rigid metal conduit back to J-boxes.
HEATER CABLE / MAT #3
RLY-12PL
RELAY PANEL
208V
HEATER CABLE / MAT #4
208V
J-BOX
208V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
CONTROL
POWER
(conduit size as per installer / local code requirements)
120V
SWITCHED
POWER
SLAB-SS
SCE-120
CONTROLLER
LOW VOLTAGE (24V)
21
Slab mounted snow sensor, located
between two passes of Heating Cable.
APPENDIX L:
SNOW MELT DIAGRAM 240V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH MANUAL CONTROL
Installer may use more J-boxes
outside or inside building.
inside
Heater cable 20ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
outside
240V CIRCUITS
240V
240V
240V
J-BOX
240V
120/240 VAC
BREAKER PANEL
HEATER CABLE / MAT #1
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
240V
HEATER CABLE / MAT #4
240V
J-BOX
240V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
SWITCHED
POWER
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
SCM-120
DIAL TIMER
CONTROLLER
22
APPENDIX M:
SNOW MELT DIAGRAM 277V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH MANUAL CONTROL
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
277V CIRCUITS
277V CIRCUITS
J-BOX
J-BOX
RLY-12PL
RELAY PANEL
277 VAC
BREAKER PANEL
J-BOX
J-BOX
HEATER CABLE / MAT #1
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
HEATER CABLE / MAT #4
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
HEATER CABLE / MAT #7
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
120V
SWITCHED
POWER
HEATER CABLE / MAT #12
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120 VAC
BREAKER PANEL
SCM-120
DIAL TIMER
CONTROLLER
23
APPENDIX N:
SNOW MELT DIAGRAM 208V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH MANUAL CONTROL
Installer may use more J-boxes
outside or inside building.
inside
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
outside
208V CIRCUITS
208V
208V
208V
J-BOX
208V
120/208 VAC
BREAKER PANEL
HEATER CABLE / MAT #1
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
208V
HEATER CABLE / MAT #4
208V
J-BOX
208V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
SWITCHED
POWER
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
SCM-120
DIAL TIMER
CONTROLLER
24
APPENDIX O:
SNOW MELT DIAGRAM 240V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH SCA-DUAL
Heater cable 20ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
240V CIRCUITS
240V CIRCUITS
240V
240V
HEATER CABLE / MAT #2
J-BOX
240V
120/240 VAC
BREAKER PANEL
HEATER CABLE / MAT #1
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
240V
HEATER CABLE / MAT #4
240V
J-BOX
240V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
CONTROL
POWER
(conduit size as per installer / local code requirements)
120V
SWITCHED
POWER
Aerial mounted snow sensor location
as per the installer.
SCA-DUAL
CONTROLLER
LOW VOLTAGE (24V)
AIR-SS
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
25
APPENDIX P:
SNOW MELT DIAGRAM 277V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH SCA-DUAL
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
HEATER CABLE / MAT #1
277V CIRCUITS
HEATER CABLE / MAT #2
277V CIRCUITS
HEATER CABLE / MAT #3
J-BOX
HEATER CABLE / MAT #5
J-BOX
RLY-12PL
RELAY PANEL
277 VAC
BREAKER PANEL
HEATER CABLE / MAT #4
HEATER CABLE / MAT #6
HEATER CABLE / MAT #7
J-BOX
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
J-BOX
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
HEATER CABLE / MAT #12
120V
SWITCHED
POWER
(conduit size as per installer / local code requirements)
120V
CONTROL
POWER
120 VAC
BREAKER PANEL
Aerial mounted snow sensor location
as per the installer.
SCA-DUAL
CONTROLLER
LOW VOLTAGE (24V)
AIR-SS
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
26
APPENDIX Q:
SNOW MELT DIAGRAM 208V - TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH SCA-DUAL
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
208V CIRCUITS
208V CIRCUITS
208V
208V
HEATER CABLE / MAT #2
J-BOX
208V
120/208 VAC
BREAKER PANEL
HEATER CABLE / MAT #1
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
208V
HEATER CABLE / MAT #4
208V
J-BOX
208V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
CONTROL
POWER
(conduit size as per installer / local code requirements)
120V
SWITCHED
POWER
Aerial mounted snow sensor location
as per the installer.
SCA-DUAL
CONTROLLER
LOW VOLTAGE (24V)
AIR-SS
LOW
VOLTAGE
(24V)
REMOTE
CONTROL
OVERRIDE
27
APPENDIX R:
SNOW MELTING DIAGRAM: 240V - TYPICAL LINE DIAGRAM (FOR 3 CIRCUITS/CABLES) WITH SCV-DUAL WITHOUT RELAY
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
inside
L1
120/240 VAC
BREAKER PANEL
outside
Heater cable 20ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
BLACK
YELLOW
120/240 VAC
HEATER CABLE / MAT #1
YELLOW
J-BOX
WHITE
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
N / L2
(conduit size as per installer / local code requirements)
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING CODES
AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
28
APPENDIX S:
SNOW MELTING DIAGRAM: 208V - TYPICAL LINE DIAGRAM (FOR 3 CIRCUITS/CABLES) WITH SCV-DUAL WITHOUT RELAY
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
inside
L1
120/240 VAC
or 120/208 VAC
BREAKER PANEL
outside
Heater cable 20ft (120V and 240V) and 50ft (208V) cold leads to
be taken through 3/4” (19mm) rigid metal conduit back to J-boxes.
BLACK
YELLOW
120/208/240 VAC
HEATER CABLE / MAT #1
YELLOW
J-BOX
WHITE
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
N / L2
(conduit size as per installer / local code requirements)
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING CODES
AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
29
APPENDIX T:
SNOW MELTING DIAGRAM: TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH SCV-DUAL WITH RELAY
Heater cable 20ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
inside
outside
HEATER CABLE / MAT #1
240V CIRCUITS
240V
240V
240V
HEATER CABLE / MAT #2
J-BOX
240V
120/240 VAC
BREAKER PANEL
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
240V
HEATER CABLE / MAT #4
240V
J-BOX
240V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
CONTROL
POWER
120V
SWITCHED
POWER
(conduit size as per installer
/ local code requirements)
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
SCV-DUAL
VALUE
CONTROL
LINE
OR
YELLOW
YELLOW
120 VAC
RELAY
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING
CODES AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
30
BLACK
WHITE
NEUTRAL
120 Volt AC
APPENDIX U:
SNOW MELTING DIAGRAM: TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH SCV-DUAL WITH RELAY
Installation Support • No Nonsense™ Warranty • (800) 875-5285 • www.WarmlyYours.com
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
Inside
Outside
HEATER CABLE / MAT #1
277V CIRCUITS
HEATER CABLE / MAT #2
277V CIRCUITS
HEATER CABLE / MAT #3
J-BOX
HEATER CABLE / MAT #5
J-BOX
RLY-12PL
RELAY PANEL
277 VAC
BREAKER PANEL
HEATER CABLE / MAT #4
HEATER CABLE / MAT #6
HEATER CABLE / MAT #7
J-BOX
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
J-BOX
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
120V
SWITCHED
POWER
HEATER CABLE / MAT #12
(conduit size as per installer
/ local code requirements)
120V
CONTROL
POWER
120 VAC
BREAKER PANEL
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
SCV-DUAL
VALUE
CONTROL
OR
LINE
BLACK
YELLOW
YELLOW
120 VAC
RELAY
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING
CODES AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
31
WHITE
NEUTRAL
120 Volt AC
APPENDIX V:
SNOW MELTING DIAGRAM: TYPICAL LINE DIAGRAM (FOR 6 CIRCUITS/CABLES) WITH SCV-DUAL WITH RELAY
Installation Support • No Nonsense™ Warranty • (800) 875-5285 • www.WarmlyYours.com
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
inside
outside
HEATER CABLE / MAT #1
208V CIRCUITS
208V
208V
208V
HEATER CABLE / MAT #2
J-BOX
208V
120/208 VAC
BREAKER PANEL
HEATER CABLE / MAT #3
RLY-12P
RELAY PANEL
208V
HEATER CABLE / MAT #4
208V
J-BOX
208V
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
120V
CONTROL
POWER
120V
SWITCHED
POWER
(conduit size as per installer
/ local code requirements)
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
SCV-DUAL
VALUE
CONTROL
LINE
OR
YELLOW
YELLOW
120 VAC
RELAY
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING
CODES AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
32
BLACK
WHITE
NEUTRAL
120 Volt AC
8”-12” crushed
rock aggregate
5” sand, stone
APPENDIX W:
ust or mortar
Control joint
EXPANSION AND CONTROL JOINT CROSS SECTION
lastic tie wrap
Concrete
Right
8”-12” crushed
Expansion joint
rock aggregate
Control joint
Concrete
Wrong
hot/cold
cold joints
installed
stalle on
slab edge
cold
3” hot/cold
bunche
unche
3”
Concrete
Heating cable secured to
rebar with plastic tie wraps
ic tie wrap
it
Wrong
hot/cold joints 6
in (15 cm) apart
and 6 in (15 cm)
from slab edge
3”
3”
Steel bar
3”
Expansion joint
3”
Concrete
Topping 2 in (5.0 cm
minimum to 3 in (7.5 cm
maximum thicknes
Heating cable secured to
rebar with plastic tie wraps
Heating cable secured to
rebar with plastic tie wraps
Dimension B must not
exceed 6 in (15 cm)
3”
Steel bar
Dimension A must not
Steel exceed
bar 3 in (7.5 cm)
3”
Heating cable secured to
rebar with plastic tie wraps
B
A
33
Topping 2 in (5.0 cm)
minimum to 3 in (7.5 cm)
maximum thickness
If dimension C exceeds 3
in(10 cm) an additional run
C
of cable must be used
Dimension B must not
APPENDIX X:
SNOW MELTING DIAGRAM: JUNCTION BOX MOUNTING
Installation Support • No Nonsense™ Warranty • (800) 875-5285 • www.WarmlyYours.com
Concrete wall
Junction box mounted on
inside wall
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Expansion joint
Conduit
Heating
cable
Hot/Cold
joint
Conduit
Cold lead
Heated Slab
1” - 6” between conduit
and hot/cold joint (splice)
34
Snow Melting Troubleshooting Guide
SYSTEM NOT MELTING SNOW
NO POWER TO HEATING PRODUCT
1. Do an amp draw test on the cables to verify proper operation.
1. T
est ohms of heating cables/rolls
2. What is the ambient air temperature?
a. In sub-zero temperatures it is simply too cold to make operation practical. The
system may run all day and night and not melt any snow at 17 degrees or less.
The system can’t generate enough BTUs to overcome the heatloss generated by
very low temperatures.
b. V
erify that LOW TEMPERATURE LOCK-OUT is not active on controller. The low
temperature lock-out function disables unit operation in temperatures less than
17°F (–8.33°C) in those climates or during those seasons where it is simply too
cold to make operation practical. The factory default low temperature lock-out
setting is Off, meaning that the unit will try to activate the heaters regardless of
ambient temperature.
3. Slab sensor/control (if present) set at too low of a temperature.
Adjust to higher temperature. This will cause the system to shut off prematurely
at a less-than-optimum slab temperature, leaving snow or water present on
the surface.
4. Severe Weather. Manually activate system to clear snow and water...
a. V
erify proper ohms per roll/cable
b. Verify no shorts
c. V
erify no open circuits
2. Inspect breaker/reset
a. Verify proper operation
b. Verify proper amperage rating per install plan
c. Verify proper mA rating of breaker
d. Replace defective breaker
e. Verify use of dual pole breakers for 208 & 240V heaters
3. Inspect Relay panel (if present)
a. Inspect/replace any faulty wiring
b. Inspect/redo/replace any faulty wiring terminals
c. Inspect/replace relay
d. Verify proper trigger voltage entering relay panel/trigger relay
4. Inoperative snow melt controller
a. Verify proper connections and power to controller
a. A very deep snow event will often take extra time to melt. Residential systems
sometimes cannot keep up with very heavy snowfalls. Heavy snowfalls, followed
by very cold temperatures can cause partial melting.
b. Verify proper voltage to controller
c. Verify proper setup/programming of controller
d. Test/inspect sensor/s for proper operation (see troubleshooting guide for
controller)
5. Insufficient watt density. Verify spacing of product vs the design plan.
a. The more distance between the heating wire, the lower the watts per square foot.
The lower the watts per foot, the less satisfactory the performance. This type of
system will have to run longer amounts of time, and may never melt snow.
e. Replace defective controller or sensor
5. Wrong voltage is being supplied to heating cable.
a. Is 280V, 240V, or 277V being supplied to a 120V product?
6. Wrong voltage is being supplied to heating cable. Verify ohms of heating product.
Do amp draw test to verify proper operation.
a. Is 120V being supplied to a 240V or 277V cable?
b. D
o the ohms match the data sheet for installed product?
c. Is the installed product drawing the correct amount of amps?
7. Test ohms of heating product
a. Verify proper ohms per roll/cable
b. Do the ohms match the data sheet for installed product?
c. Repair/replace damaged heating product
6. Inspect wiring between breaker box and control, between control and sensor/s,
control and relay panel (if present), and between relay panel and outside junction
box/es.
7. Inspect heater connections inside all junction boxes.
b. V
erify no shorts
8. Inspect breaker/reset
9. Inspect wiring and connections inside junction boxes
35
Snow Melting Troubleshooting Guide
MEGA-OHM INSULATION READINGS LOWER THAN SPEC
b. Inspect installation area. Has any work been done in area by trade personnel?
Is there visible damage to the concrete, slab, or pavers?
c. Use troubleshooting kit and thermal camera to locate damage
d. Repair damaged area of lead
e. Replace damaged heating product
1. Rain or high humidity present
a. Dry wires at test point
b. Check for water ingress at junction boxes
c. Dry connections and re-test.
2. Physical damage to cold lead, splice, or heating product
a. Inspect installation area. Has any work been done in area by trade personnel? Is
there visible damage to the concrete, slab, or pavers?
b. Use troubleshooting kit and thermal camera to locate damage
c. Repair damaged area of cable
d. Replace damaged heating product
HEATING PRODUCT RESISTANCE INFINITE
HEATING PRODUCT RESISTANCE LOWER THAN SPECIFICATION
HEATING PRODUCT RESISTANCE ZERO
1. Conductor shorted to ground somewhere in heating cable
a. T
est for ohms across conductors to ground and compare to spec for that product
b. U
se troubleshooting kit (from conductor to ground) and thermal camera to locate
fault
c. Repair damaged area of heating product
2. Both conductors shorted together somewhere in heating cable
a. Test for ohms across conductors and compare to spec for that product
b. U
se troubleshooting kit (from conductor to conductor) and thermal camera to
locate fault
c. Repair damaged area of heating product
HEATING PRODUCT RESISTANCE HIGHER THAN SPECIFICATION
1. Conductor shorted to ground somewhere in heating cable
a. T
est for ohms across conductors to ground and compare to spec for that product
b. U
se troubleshooting kit (from conductor to ground) and thermal camera to locate
fault
c. Repair damaged area of heating product
2. Both conductors shorted together somewhere in heating cable
a. Test for ohms across conductors and compare to spec for that product
b. U
se troubleshooting kit (from conductor to conductor) and thermal camera to
locate fault
c. Repair damaged area of heating product
3. Cold lead damaged
a. Inspect exposed coldlead
1. Open circuit
a. U
se troubleshooting kit (from conductor to conductor) and thermal camera to
locate fault
b. Repair damaged area of heating product
1. Conductor/s shorted to ground at factory splice
a. Use troubleshooting kit and thermal camera to locate fault
b. Remove factory splice and repair damaged area of heating product
c. C
ontact WarmlyYours for instructions on returning Factory Splice for inspection
RESETTING CIRCUIT BREAKER
1.Test ohms of heating cables/rolls
a. Verify proper ohms per roll/cable
b. Verify no shorts
c. Verify no open circuits
d. Use troubleshooting kit and camera to locate fault
e. Repair fault
2.Inspect breaker/reset
a. Verify proper operation
b. Verify proper amperage rating per install plan (re-calculate circuit load)
c. Verify proper mA rating of breaker (30 mA GFEP breaker required by code)
d. Replace defective breaker
e. Verify use of dual pole breakers for 208 & 240V heaters
3.Inspect all connections
a. Correct any incorrect wiring at all connections in the power feed
4.Inspect Junction Box/es
a. Install drains in boxes if required
b. Dry connections and re-connect
c. Replace any faulty junction boxes
36
WarmlyYours Snow Melting Warranty
WarmlyYours, Inc. warrants the WarmlyYours snow melting cables and mats (“the Product”) to be free from defects in materials and workmanship for ten years
from the date of purchase, provided that the Product is installed in accordance with the WarmlyYours product installation guide, any special written or oral design
or installation guidelines provided by WarmlyYours for the specific project that the Product is intended, the provisions of the National Electric Code (NEC), and all
applicable local building and electrical codes. If the Product is determined to be defective in materials and workmanship, and has not been damaged as a result of
misuse, misapplication or improper installation, WarmlyYours will replace the Product or refund the original cost of the Product. Controls sold under the WarmlyYours
name are warranted for two years from date of purchase. Should the control be defective or malfunction, return the control to WarmlyYours and it will be repaired
or replaced (at WarmlyYours’ option). The warranty does not cover removal or reinstallation costs. See entire warranty in packaging. Other controls carry their
manufacturer’s warranty.
WarmlyYours Inc. assumes no responsibility under this warranty for any damage to the Product prior to or during installation by anyone, including, but not limited to
trades people or visitors to the job site, or damage caused as a result of post installation work. Call our toll free number, (800) 875-5285, if you have any questions
about installation. The Limited Warranty is null and void if the Product owner or his representative attempts to repair the Product without receiving authorization. Upon
notification of an actual or possible problem, WarmlyYours will issue an Authorization to Proceed under the terms of the Limited Warranty. WarmlyYours reseves the
right to void said warranty, if the product owner repairs any heating wire, for any reason.
Warranty Subject to the Following Conditions: 1. The warranty of the snow melting system must be registered by completing and returning the attached
‘WarmlyYours Warranty Registration’ card to WarmlyYours, Inc. within thirty days of date of purchase. Please keep your invoice, as proof of date of purchase will be
required in the event of a claim. 2. The snow melting cables or mats must be installed properly under concrete, asphalt or in mortar under pavers 3. The snow melting
system must be electrically grounded and protected by a GFI (Ground Fault Interrupter). 4. The installation must comply with all national and local electrical and
building codes, as well as any other applicable statutory requirements. 5. The manufacturer hereby reserves the right to inspect the installation site at any reasonable
time. 6. The warranty is not automatically transferred with change of ownership, but the manufacturer may, on application, transfer the warranty for the period
remaining. This transfer is solely at the discretion of the manufacturer. 7. The snow melting should be used strictly in accordance with the following: 7a. Hard wire the
snow melting cables and mats to a dedicated circuit. The voltage of the circuit should match the voltage of the snow melting system, and the size of the circuit should
be such that the system does not occupy more than 80% of the circuit capacity. 7b. Should you feel no warmth from the surface that the system is installed within
60 minutes, verify that there is power to the control or thermostat. Contact WarmlyYours after verifying that there is power to the system. Under no circumstances
should you or anyone else tamper with or attempt to repair the snow melt system - this will render the warranty null and void. 7c. Switch the system on and off as you
would any conventional electric heater, although timers or thermostats may be used if preferred. 7d. Use reasonable care in the operation of the system. Do not drop
heavy articles, pierce or cut the surface that the heating system is installed. 7e. All restrictions and warnings detailed in the installation guide must be strictly followed.
WARMLYYOURS, INC. DISCLAIMS ANY WARRANTY NOT PROVIDED HEREIN, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR IMPLIED
WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. WARMLYYOURS FURTHER DISCLAIMS ANY RESPONSIBILITY FOR SPECIAL, INDIRECT,
SECONDARY, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING FROM OWNERSHIP OR USE OF THIS PRODUCT, INCLUDING INCONVENIENCE
OR LOSS OF USE. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE FACE OF THIS DOCUMENT. NO AGENT OR REPRESENTATIVE OF
WARMLYYOURS HAS ANY AUTHORITY TO EXTEND OR MODIFY THIS WARRANTY UNLESS SUCH EXTENSION OR MODIFICATION IS MADE IN WRITING
BY A CORPORATE OFFICER.
37
WarmlyYours Snow Melt Warranty Registration
Thank you for purchasing your new WarmlyYours Snow Melting System. Once the report form is completed, please copy the form and attach a copy to the
main breaker box, or give to the homeowner or business owner.
Please send a copy to WarmlyYours via mail, FAX at (800) 408-1100, or scan and send via e-mail to: [email protected].
HOMEOWNER/JOB LOCATION INFORMATION
Name
Phone
Address
Email
City
State
Order Number
Job Name
ZIP
ELECTRICIAN INFORMATION
PAVING/CONCRETE INSTALLER INFORMATION
Company Name
Company Name
Address
Address
City
State
Installer Name
Phone
Install Date:
Material Depth Below Cable [2” (51mm) Min.]:
ZIP
City
State
Installer Name
Phone
ZIP
Installed Under: q Concrete q Asphalt q Pavers q Other If Pavers, thickness of the Paver:___________________ [2.5” (64mm) Max]
Material Depth Above Cable [1.5” (38mm) Min.]:
Cable/Mat 1 Cable/Mat 2 Cable/Mat 3 Cable/Mat 4 Cable/Mat 5 Cable/Mat 6 Cable/Mat 7 Cable/Mat 8 Cable/Mat 9 Cable/Mat 10
Zone ID
OHM Reading 1 - Before Install
*MegOHM Reading 1 - Before Install
OHM Reading 2 - During Install
*MegOHM Reading 2 - During Install
OHM Reading 3 - After Install
*MegOHM Reading 3 - After Install
PART #
Serial Number - Internal Use Only
QC MEGOHM - Internal Use Only
QC OHM - Internal Use Only
Megohms readings are done across the assembly’s green, ground wire to each conductor separately. Remember to keep a copy of this form with your warranty.
*If at any time a reading does not exceed 10 Megohms, please halt installation and contact WarmlyYours.