Circuit Design – Expanded Kits

jallen — Mon, 20 Jun 2022 17:51:56 +0000

SnowMeltz Expanded System Circuit Design

In order to ensure proper load balancing on circuits, the SnowMeltz expanded kits have been designed to use combinations of mats on specific circuits:

SnowMeltz® Large Mat Kits

Heatizon Part Number	Circuit Number/ Amperage	Mats	Amps Per Mat @ 240V	Amps Per Circuit @ 240V	Mat(s) Square Footage	Mat Dimensions
SM-50W277-37W240-200	1 – 20A	SM-50W277-37W240-100	15	15	100	2’x50′
SM-50W277-37W240-200	2 – 20A	SM-50W277-37W240-100	15	15	100	2’x50′
SM-50W277-37W240-220	1- 30A	SM-50W277-37W240-50	7.7	17	50	2’x25′
	1- 30A	SM-50W277-37W240-60	9.3	17	60	2’x30′
	2 – 30A	SM-50W277-37W240-50	7.7	17	50	2’x25′
	2 – 30A	SM-50W277-37W240-60	9.3	17	60	2’x30′
SM-50W277-37W240-240	1- 30A	SM-50W277-37W240-60(x2)	9.3	19	60	2’x30′
SM-50W277-37W240-240	2- 30A	SM-50W277-37W240-60(x2)	9.3	19	60	2’x30′
SM-50W277-37W240-270	1- 30A	SM-50W277-37W240-60	9.3	21	60	2’x30′
	1- 30A	SM-50W277-37W240-75	11.6	21	75	2’x37′
	2- 30A	SM-50W277-37W240-60	9.3	21	60	2’x30′
	2- 30A	SM-50W277-37W240-75	11.6	21	75	2’x37′
SM-50W277-37W240-290	1 – 30A	SM-50W277-37W240-60	9.3	22	60	2’x30′
		SM-50W277-37W240-85	13.1	22	85	2’x43′
	2 – 30A	SM-50W277-37W240-60	9.3	22	60	2’x30′
		SM-50W277-37W240-85	13.1	22	85	2’x43′
SM-50W277-37W240-300	1 – 30A	SM-50W277-37W240-75(x2)	11.6	23	75	2’x37′
SM-50W277-37W240-300	2 – 30A	SM-50W277-37W240-75(x2)	11.6	23	75	2’x37′
SM-50W277-37W240-320	1 – 40A	SM-50W277-37W240-75	11.6	25	75	2’x43′
	1 – 40A	SM-50W277-37W240-85	13.1	25	85	2’x50′
	2 – 40A	SM-50W277-37W240-75	11.6	25	75	2’x43′
	2 – 40A	SM-50W277-37W240-85	13.1	25	85	2’x50′
SM-50W277-37W240-340	1 – 40A	SM-50W277-37W240-85(x2)	13.1	26	85	2’x43′
SM-50W277-37W240-340	2 – 40A	SM-50W277-37W240-85(x2)	13.1	26	85	2’x43′
SM-50W277-37W240-370	1 – 40A	SM-50W277-37W240-85	13.1	29	85	2’x43′
	1 – 40A	SM-50W277-37W240-100	15.4	29	100	2’x50′
	2 – 40A	SM-50W277-37W240-85	13.1	29	85	2’x43′
	2 – 40A	SM-50W277-37W240-100	15.4	29	100	2’x50′
SM-50W277-37W240-380	1 – 40A	SM-50W277-37W240-60	9.3	30	60	2’x30′
	1 – 40A	SM-50W277-37W240-130	20	30	130	2’x65′
	2 – 40A	SM-50W277-37W240-60	9.3	30	60	2’x30′
	2 – 40A	SM-50W277-37W240-130	20	30	130	2’x65′

SnowMeltz® Jumbo Mat Kits

Heatizon Part Number	Circuit Number/ Amperage	Mats	Amps Per Mat @ 240V	Amps Per Circuit @ 240V	Mat(s) Square Footage	Mat Dimensions
SM-50W277-37W240-410	1 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	1 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	2 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	2 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
SM-50W277-37W240-615	1- 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	1- 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	2- 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	2- 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	3- 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	3- 40A	SM-50W277-37W240-130	20	32	130	2’x65′
SM-50W277-37W240-820	1 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	1 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	2 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	2 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	3 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	3 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
	4 – 40A	SM-50W277-37W240-75	11.6	32	75	2’x37′
	4 – 40A	SM-50W277-37W240-130	20	32	130	2’x65′
SM-50W277-37W240-1040	1 – 50A	SM-50W277-37W240-130	20	40	75	2’x65′
	1 – 50A	SM-50W277-37W240-130	20	40	130	2’x65′
	2 – 50A	SM-50W277-37W240-130	20	40	85	2’x65′
	2 – 50A	SM-50W277-37W240-130	20	40	100	2’x65′
	3 – 50A	SM-50W277-37W240-130	20	40	60	2’x65′
	3 – 50A	SM-50W277-37W240-130	20	40	130	2’x65′
	4 – 50A	SM-50W277-37W240-130	20	40	60	2’x65′
	4 – 50A	SM-50W277-37W240-130	20	40	130	2’x65′

Important: DO NOT OVERLOAD CIRCUITS!
Follow the load balancing chart to ensure the appropriate loads are on specific
circuits. It is also important to use properly sized breakers to be able to achieve the
desired amount of power required.

When installing SnowMeltz multiple mat systems, be sure to keep track of which mat is going to
the appropriate circuit. Mark the cold leads and/or note resistance to keep track.

The use of junction boxes may be required to extend cold leads back to either the activation
device or to the contactor panel. Extending/junctioning cold leads MUST be done in accordance
with the National Electric Code and any/all local codes. Be sure to note the amps per mat/circuit
in order to determine the appropirate conductor and junction box to use. Any junction box used
outside MUST be outdoor-rated.

Do not make ANY connections inside of the following activators:

M326A/2Z
M326ARS/2Z

All electrical connections for these devices MUST take place outside of the device, in a
outdoor-rated junction box with adequate space for all connections

Electrical Connections

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Electrical Connections

jallen — Wed, 02 Mar 2022 16:09:35 +0000

Previous Step

The connection of the power supply and the activation device must be done by a qualified electrician in accordance with the National Electrical Code (NEC) and the Canadian Electrical Code (CEC). Refer to the wiring diagram included with the activation device and/or panel(s).

Electrical Requirements:

120 or 277 VAC — Single Phase
208, 240, or 480 VAC — Two Phase

The grounding shield from the Cold Lead(s) must be wired to Ground for all primary power installations. Section 426 of the NEC requires that each circuit to the heating cable be protected with a ground fault equipment protection devices.

Expanded SnowMeltz Kits have specific circuit design/load balancing requirements, please see: CIRCUIT DESIGN

Heatizon recommends that photographs of the installed heating cable be taken and/or hand drawings documenting the layout be completed prior to before installing the asphalt, concrete, pavers, stone or tile.

Forms

M326A Activation

M326ARS/-2Z Activation

Panel Installation

Other Activation Devices