WarmWire Spec Sheet

SunTouch WarmWire is a series resistance heating cable assembly installed
over plywood, backerboard, or concrete slab (according to ANSI or TCNA
guidelines), and then embedded in
3
⁄8" (9.5 mm) or greater self-leveling or
polymer-modified thin-set mortar. WarmWire is approved for installation
in shower applications.
SunTouch
®
WarmWire
®
120 and 240 Voltages
For Residential and Commercial Applications
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ES-ST-WarmWire
Supply Voltage
120 VAC, 1-phase
240 VAC, 1-phase
Amp Draw
120 VAC: 1amp per 10 ft
2
240 VAC: 1amp per 20 ft
2
Maximum Circuit Load 20 amps (15 amps with SunStat control)
Wire Spacing
2.5" (63.5 mm) o.c.
3" (76 mm) o.c.
3.5" (89 mm) o.c.
Maximum Allowable Temperature
194°F (90°C)
Continuously
EMF
Less than 1 milligauss at 1/2"
(12.7 mm) above surface
Minimum Allowable Bend Radius 1" (25 mm)
Power Lead Length 10' (2.7 m)
This Engineering Sheet is not intended to provide full installation instructions
and safety information. In order to avoid property damage or injury, please
refer to the complete installation manual and product safety information
provided with the product.
Never cut the heating cable or damage it in any way. Use only the attachment
methods as described in the Installation Manuals for SunTouch WarmWire as
other methods may damage the heating element.
Specifications
Application
Parameters
√
Watt Density
2.5" (63.5 mm) o.c. 14.4 W/ft
2
(155.0 W/m
2
)
3" (76 mm) o.c. 12.0 W/ft
2
(129.0 W/m
2
)
3.5" (89 mm) o.c. 10.3 W/ft
2
(110.8 W/m
2
)
Minimum
Polymer-modified
Thinset
3/8" (9.5 mm)
Allowable
Substrate
Backer board over wood subfloor
Polymer-modified setting bed over wood subfloor
Polymer-modified setting bed over concrete slab
Thin slab/self-leveling concrete over
wood subfloor
Thin slab/self-leveling concrete over
concrete slab
Allowable Floor
Coverings
Tile/Stone
Carpet
Hardwood
Note: Most anti-fracture membranes are approved for use with WarmWire.
Contact manufacturer for details on specifi c products.
WarmWire is available in various lengths with voltage options of
120 or 240 VAC.
• Measure and certify the correct wire resistance (ohms) value for the
heating cables, record these readings in the chart provided in the
installation manual.
• Use of manufacturer’s alarm meter (LoudMouth™ meter) is recommended
during installation.
• Clean the subfloor.
• Secure sections of the HeatMatrix or CableStrap™ to the floor.
• Weave the heating cable across the floor area, fastening it to the strap.
Distance between heating cables may be varied on-site to fit requirements
and should average 2.5", 3", or 3.5" on-center.
• Install the floor sensor in accordance with installation manual.
• Install floor coverings as detailed in installation manual.
UL Listed for U.S. under UL Standard 1673 and Canada
under CAN/CSA C22.2 No. 130.2-93.
Listing file number E185866.
Installation Guidelines
SunTouch product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise
measurements, please contact SunTouch Technical Service. Suntouch reserves the right to change or modify product design, construc-
tion, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on
SunTouch products previously or subsequently sold. Refer to the owner's manual for warranty information.