March 2022 – Page 2

March 1, 2022

Product Selection

Since SnowMeltz CANNOT be shortened, it is vital to choose the correct size system before installing. It is advisable to always get a smaller system for the area, for example: if the area is 48 square feet, choose a 40 or 45 square foot system.

SnowMeltz® Mat, 50 Watts/Ft2 @ 208 VAC

Heatizon Part Number	Total Watts	Total Ohms	Amps @ 208V	Coverage Area/Square Foot	Watts per Foot	Watts/ Square Foot	Mat Length	Mat Width	Cold Lead Length/ AWG
SM-50W208-10	520	120.0	2.4	10	12	50	5′	24″	20’/14
SM-50W208-15	825	80.0	3.6	15	12	50	7.5′	24″	20’/14
SM-50W208-25	1235	60.0	6	25	12	50	12.5′	24″	20’/14
SM-50W208-35	1745	48.0	8.4	35	12	50	17.5′	24″	20’/14
SM-50W208-45	2245	40.0	10.8	45	12	50	22.5′	24″	20’/14
SM-50W208-60	2995	34.3	14.4	60	12	50	30′	24″	20’/14
SM-50W208-75	3680	11.8	18	75	12	50	37.5′	24″	20’/14
SM-50W208-100	4740	9.1	24	100	12	50	50′	24″	20’/14

SnowMeltz® Mat Models – 50 Watts/Ft2 @ 240VAC or 37 Watts/Ft2 @208VAC

Heatizon Part Number	Total Watts	Total Ohms	Amps @ 240V	Watts/ Sqft 240V	Watts/Ft	Amps @ 208V	Watts/ Sqft 208V	Coverage Area/Square Foot	Mat Length	Mat Width	Cold Lead Length/ AWG
SM-50W240-37W208-15	775	120.0	3.2	50	12	2.8	37	15	8′	24″	20’/14
SM-50W240-37W208-20	950	80.0	4.0	50	12	3.4	37	20	10′	24″	20’/14
SM-50W240-37W208-30	1425	60.0	5.9	50	12	5.1	37	30	15′	24″	20’/14
SM-50W240-37W208-35	1840	48.0	7.7	50	12	6.6	37	35	18′	24″	20’/14
SM-50W240-37W208-45	2215	40.0	9.2	50	12	8.0	37	45	22′	24″	20’/14
SM-50W240-37W208-60	3015	34.3	12.6	50	12	10.9	37	60	30′	24″	20’/14
SM-50W240-37W208-75	3660	30.0	15.3	50	12	13.2	37	75	37′	24″	20’/14
SM-50W240-37W208-110	5500	9.1	22.9	50	12	19.9	37	110	55′	24″	20’/14

SnowMeltz® Mat Models – 50 Watts/Ft2 @ 277VAC or 37 Watts/Ft2 @240VAC

Heatizon Part Number	Total Watts	Total Ohms	Amps @ 277V	Watts/ Sqft 240V	Watts/Ft	Amps @ 240V	Watts/ Sqft 240V	Coverage Area/Square Foot	Mat Length	Mat Width	Cold Lead Length/ AWG
SM-50W277-37W240-10	426	180.1	1.5	50	12	1	37	10	4′	24″	20’/14
SM-50W277-37W240-15	712	107.8	2.6	50	12	2	37	15	7′	24″	20’/14
SM-50W277-37W240-20	1100	69.8	4.0	50	12	3	37	20	10′	24″	20’/14
SM-50W277-37W240-25	1250	61.4	4.5	50	12	4	37	25	13′	24″	20’/14
SM-50W277-37W240-35	1650	46.5	6.0	50	12	5	37	35	17	24″	20’/14
SM-50W277-37W240-40	2050	37.4	7.4	50	12	6	37	40	21′	24″	20’/14
SM-50W277-37W240-45	2250	34.1	8.1	50	12	7	37	45	23′	24″	20’/14
SM-50W277-37W240-50	2500	30.7	9.0	50	12	8	37	50	25′	24″	20’/14
SM-50W277-37W240-60	2995	25.6	10.8	50	12	9	37	60	30′	24″	20’/14
SM-50W277-37W240-75	3610	21.3	13.0	50	12	11	37	75	37′	24″	20’/14
SM-50W277-37W240-85	4210	18.2	15.2	50	12	13	37	85	43′	24″	20’/14
SM-50W277-37W240-100	4900	15.7	17.7	50	12	15	37	100	50′	24″	20’/14
SM-50W277-37W240-130	6350	12.1	22.9	50	12	20	37	130	65′	24″	20’/14

Complete Kits

Installation

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March 1, 2022

SnowMeltz® System

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SnowMeltz® Specifications & Electrical Connections

Cable Construction	Twin Conductor
Rated Voltage	120VAC to 600VAC
Output	12 watts/ft max.
Length	Refer to Individual Product Labels
Cable Diameter	0.24” to 0.35”
Cable Type	Constant Wattage
Conductor Insulation	Fluoropolymer
Outer Insulation	Cross-Linked XLPE
Protective Screen	Tinned Copper
Outer Jacket	Cross-Linked Halogen Free Fire Retardant Polyolefin with UV Protection
Heating Endurance	-22°F(-30°C) to 194°F(90C)
Short Term Heating Endurance for Asphalt	464°F(240°C) not to exceed 30 minutes
Minimum Spacing	2”
Standard Spacing	3” to 6”
Cap Thickness	2” to 4” max
Bending Radius	6D** (approx. 2”)
Thermal Resistance	464°F(240°C) – Do not to exceed 30 minutes

120V and 277V
Connection

PHASE	Copper Element (Cold Lead)
NEUTRAL	Copper Element (Cold Lead)
GROUND	Shield Braid (Cold Lead)

208V, 240V and 480V Connection

PHASE	Copper Element (Cold Lead)
PHASE	Copper Element (Cold Lead)
GROUND	Shield Braid (Cold Lead)

SnowMeltz® Labels on mat include the following information:

Listing information
Serial number
Size of mat
Allowable voltages for product
Amps at selected voltage
Ohms of cable
Total Watts generated
Number of conductors
Watts per foot (at voltage)

It is important that heating cable be installed only by qualified persons who are familiar with the proper sizing, installation, construction and operation of snow melting systems and the hazards involved. Heating cable products are designed for in and under concrete, asphalt, and paver snow melt applications.

Article 426 of the NEC requires ground fault protection for line voltage equipment embedded in a noncombustible medium. Check local building codes and regulations for ground fault protection device (i.e. GFCI, GFEP, etc. ) requirements when installing all heating cable products.
Do not bend heating cable within 3” of a termination or connection between the heating element and the cold lead. Heating cables cannot cross or touch one another.
Article 426 of the NEC limits embedded deicing and snow melting equipment to a maximum of 1300 watts/m² (120 watts/ft²) of heated area.
Store the heating cable in a dry place up to the resistance temperature of the jacket 194°F (90°C).
Minimum installation temperature is 23°F (-5°C)
Read the instructions carefully before installing SnowMeltz® system.
Remember to measure the resistance four times.
The heating cable cannot be cut to length, crossed over itself, or installed too close to itself.
Remember to check that the supply voltage matches the voltage of the SnowMeltz® system.
Remember to place the labels as written in this instruction.
Only for outdoor installation, not for roofs.

Please consult Heatizon Systems for any other questions.

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March 1, 2022

Important Safeguards and Warnings

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WARNING: Shock and fire hazard

If the SnowMeltz® System is damaged or not installed properly, fire or shock could occur resulting in serious personal injuries or damage to property. Carefully follow the warnings and instructions contained in this manual.
It is important that this equipment is installed only by qualified persons who are familiar with the proper sizing, installation, construction and operation of floor warming systems and the hazards involved.
The installation must comply with all national and local electrical codes. Consult the authority in the jurisdiction familiar with these requirements, the NEC (National Electric Code), or CSA (Canadian Standard Association) should there be any questions.
The SnowMeltz® System is designed for Concrete, Asphalt, and Sand (paver) exterior heating purposes only. Be sure that the surface will be completed in such a way to not cause mechanical damage to this system in the future.
If the SnowMeltz® System is damaged, it must be replaced or repaired. To repair or to splice any part of the system, use only Heatizon SnowMeltz® Repair Kit (part number SMRPKIT).

General Guidelines

Use of the Manual

This manual describes the SnowMeltz® heating system — how to design the space, select
the product, and install the system. It is important to thoroughly review this manual and the
Activator Installation and Operation Manual prior to installation.

Heatizon Systems
4137 South 500 West
Murray, UT 84123 USA
Tel: 888-239-1232
Tel: 801-293-1232
Fax: 801-293-3077

DOWNLOAD THE STANDARD SNOWMELTZ MANUAL
(PDF VERSION)

DOWNLOAD THE EXPANDED SNOWMELTZ MANUAL
(PDF VERSION)

Safety Guidelines

The safety and reliability of any snow melting system depends on proper design, installation, and testing. Incorrect installation or mishandling of the product can cause damage to the heating cable, system components and property, and can create a risk of fire or shock. The guidelines and instructions contained in this manual are important. Follow them carefully to minimize these risks and to ensure that the SnowMeltz® System performs as designed.

The SnowMeltz systems are engineered to achieve specific heat output for the square footage to which they are designed. Cutting the heating cable to fit a space is extremely dangerous and can result in a fire. Do not cut the heating cable to avoid an obstacle or fixture, use other methods as described in this manual. Make sure to avoid damaging/cutting the heating cable during/after the installation of the substrate by being aware of all heating cable locations.

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March 1, 2022

Concrete Suggestions

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Heatizon Systems is not an asphalt, concrete or pavers expert, but we have a few suggestions that you may wish to discuss with your contractor. We make these suggestions in an effort to increase the likelihood that Heatizon Systems’ SnowMeltz® will be surrounded by products that are equal to it in both quality and expected longevity. In addition, we make these suggestions in an effort to reduce the possibility that your SnowMeltz® heating element will get damaged or broken by the vertical or horizontal movement of asphalt, concrete, or pavers.

Dry Base: Make certain that the ground below where the new asphalt, concrete or pavers will be located is as dry as possible. It is recommended that it be covered whenever there is a risk of a storm for one to two weeks prior to the pour.

Excavation: Be sure that your excavation is deep enough to accommodate the thickness of the concrete, the thickness of the insulation, the depth of the aggregate base you will have below the concrete and a 1” sand bed if you elect to install the SnowMeltz® below the concrete.

Compaction: Once the excavation is complete, it is highly recommended that a great deal of care be given to completely and properly compact the entire area where the asphalt, concrete or pavers will be located.

Drainage: In order to have proper drainage and to reduce the likelihood of vertical shifting of your asphalt, concrete, or pavers Heatizon Systems recommends that a minimum of 6 inches of high quality aggregate be laid over the entire area where the asphalt, concrete, or pavers are to be installed, plus one foot around all edges.

Reinforcement: In order to enhance the integrity of your asphalt, concrete or pavers, Heatizon Systems recommends that reinforcement be considered. Most of the time concrete can be reinforced with number 4 gauge welded wire fabric or ½ inch re-bar placed at least 2 inches from the top and bottom surfaces of the concrete.

Insulation: Insulation is a two edged sword. On the one hand, it acts as a good moisture barrier, reduces the response time of your snow melt or heating system, and saves money by reducing operating time. On the other hand, insulation does not allow the heat from the ground to get into the asphalt, concrete, or pavers.

Maximum Area: Heatizon Systems recommends that concrete be poured in square sections no larger than 9.5 feet X 9.5 feet. Pouring other geometric shapes without additional joints almost always results in cracking. Each square must always have a joint on each of its four sides.

Thickness: Heatizon Systems always recommends the following thickness be observed:

Concrete 5 or more inches
Asphalt 4 or more inches
Pavers 4 or less inches

Suggested Mix: Heatizon Systems recommends that a six-bag mix with fiber or steel fibers always be used when pouring concrete.

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March 1, 2022

Introduction

Heatizon Systems is glad to offer product phone support for the SnowMeltz® product. It is VERY important to have read this manual first. Please have your resistance test numbers and system model name/number available BEFORE calling for technical support.

The SnowMeltz® Heating Cable comes in pre-established lengths that have been designed to deliver a specified heat density. Therefore, it is essential that all of the SnowMeltz® Heating Element contained in the kit be installed. Do not cut or alter the heating cable in any way.

In order to minimize the risk of damage to the SnowMeltz® Heating Cable, Heatizon Systems recommends that the SnowMeltz® Cable be installed immediately prior to the installation of the cementitious material that goes over it.

Never cross the SnowMeltz® Heating Cable over itself or any other conductor or wire.

When installing Heatizon Systems products, strict compliance with the National Electrical Code, local Building Codes, and Heatizon’s Installation Manual is essential.

It is highly recommend to take photographs to document the installed SnowMeltz® for future
reference before completing installation.

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Month: March 2022

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SnowMeltz® Specifications & Electrical Connections

120V and 277VConnection

208V, 240V and 480V Connection

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WARNING: Shock and fire hazard

General Guidelines

Use of the Manual

Safety Guidelines

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120V and 277V
Connection