Install Instructions

IOM-WR-WW 1616 2 of 36
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can result
in death, serious personal injury, property damage, or damage
to the equipment.
Keep this Manual for future reference.
WarmWire® is a simple, economical way to warm any floor, and provide years of lasting comfort. This
instruction manual provides complete details, suggestions, and safety precautions for installing this
floor-warming system. Fasten the cables to the floor. Then, depending on the floor coverings to be
used, put down a layer of thin-set, thick-set, or self-leveling mortar on top of the cables. Finally, install
the floor coverings. It’s that simple!
Heating
Wire
Factory
Splice
End Splice
Power Lead
Specifications for WarmWire:
WarmWire is a complete heating cable consisting of a series resistance heating cable and a
power lead for connection to the electric power supply. The heating cable cannot be cut to fit.
Voltages: 120 VAC, 240 VAC, 1-phase
Watts: 3 W/linear foot. Approximately 10.3 W/ft
2
(34 Btu/h/ft
2
) for 3.5" spacing, 12 W/ft
2
(41 Btu/h/ft
2
) for 3" spacing. and 14.4 W/ft
2
(51 Btu/h/ft
2
) for 2.5" spacing. (See Table 2)
2.5" spacing may only be used under masonry surfaces with a maximum floor covering R-value
of R-1.5 as indicated in this manual. 3" or 3.5" spacing may be used under floor covering types
with a maximum R-value of R-2.5.
Maximum circuit load: 15 amps
Maximum circuit overload protection: 20 amp breaker
GFCI: (Ground Fault Circuit Interrupter) required for each circuit (included in the SunStat control)
Listing: UL Listed for U.S. and Canada under UL 1673 and CAN/CSA C22.2 No. 130.2-93,
File No. E185866
Application: Indoor floor heating only (-X on the nameplate label indicates CUL Listing for this
application). Suitable for installation in a shower area (see pg 18 for restrictions) (-W on the
nameplate label indicates CUL Listing for Wet Location in Canada per Canadian Electrical
Code, Part I (CEC)).
Embedded in cement based
mortar only, polymer-modified
preferred (see Appendix 1).
Minimum bend radius: 1 inch
Maximum exposure temperature:
(continuous and storage) 194ºF (90ºC)
Minimum installation temperature: 50ºF (10ºC)
Installation must be performed by qualified persons, in accordance with local codes, ANSI/
NFPA 70 (NEC Article 424) and CEC Part 1 Section 62 where applicable. Prior to installation,
please consult the local codes in order to understand what is acceptable. To the extent this
information is not consistent with local codes, the local codes should be followed. However,
electrical wiring is required from a circuit breaker or other electrical circuit to the control.
It is recommended that an electrician perform these installation steps. Please be aware
local codes may require this product and/or the control to be installed by an electrician.