STEP 1 — ROUGH IN

Determine the Location of the Back Plate

1.1 Determining the placement location of the Back Plate is the first step in the electrical rough-in process. The placement of this plate must allow for easy future access, good air flow, and protection from moisture. Acceptable locations include garages, basements, utility rooms, or mechanical rooms.

Use the following guidelines for locating the Back Plate:

Location must be easily accessible for installation, service and maintenance.

Maintain a minimum of 6 inches of clearance betweed the Back Plate and any ceiling, wall, floor, or adjacent Back Plate.

Do not locate Back Plate in an area where it will be covered.

Maintain 45 inches of clear space in front of every Back Plate.

Placement outdoors is acceptable only if enclosed in a Heatizon Systems Enclosure Kit (ENCLKIT), which comes with a customized Back Plate

Do not place in an area where high humidity is present, or where Control Unit may be exposed to water.

Consideration for sound and vibration of transformer is advised. Proper sound attenuation insulation or vibration isolation is recommended

Note: Knockout opening in all Heatizon Systems products shoeld never be used except with devices that are designed to fill those openings.

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

1.2 Determine whether the Back Plate (P1320) will be installed on studs (spaced on 16” centers), on a concrete or other non framed surface using a Rough-In Box (P4184), or if an Enclosure Kit will be used.

Back Plate on studs. If Back Plate will be mounted on studs, studs must be capable of supporting shear and lateral loads of at least 100 pounds per Back Plate.

Back Plate on concrete. If the Back Plate mounting area is to be a concrete or non-framed sur face, the use of a Heatizon Rough-In Box (P4184) is recommended, and should be installed at this point.

The Rough-In Box provides several knock-outs for ease of conduit connections and 1/4-20 bolted connec tions of the Back Plate to the Rough-In Box. The Rough-In Box is to be surface mounted using adequate anchoring devices to accept shear loads and lateral loading of Control Unit and Transformer (weight may equal 100 lbs for larger systems).

Enclosure Kit. If the Back Plate will be exposed to water or high humidity, or if it will be mounted outdoors, a Heatizon Systems Enclosure Kit with a customized Back Plate should be used.

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Install the Back Plate

ROUGH -IN

1.3 Install the Back Plate on studs or on a Rough-in Box.

Back Plate on studs. Press black bushings through the five desig nated holes in the Back Plate. These holes will later be used for the Cold Leads and power supply.

You may wish to pre-drill holes before inserting anchoring devices. Use anchoring devices which are capable of supporting shear and lateral loads of up to 100 pounds.

After securing an anchoring device in one mounting hole, level the Back Plate before inserting remaining screws.

Back Plate in a Rough-In Box. If the Back Plate mounting area is to be a concrete or non-framed surface, a Heatizon Rough-In Box installed in Step 1.2.

Using the bolts provided, the Back Plate will be installed to the Rough-In Box (P4184) us- ing the same steps above, after the wires have been run.

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Plan the Cold Lead		ROUGH-IN
1.4 The Cold Leads will be run the total horizontal and vertical distance from the selected Back Plate or Rough-In Box placement location, to the location where the Tuff Cable or ZMesh will eventually begin and end. Once the Back Plate(s) has been installed, plan the Cold Lead runs by walking through the building. Generally there are three possible configurations for running the Cold Lead. Make sure you know the type of system you have purchased and how to layout your design before you begin.
Sample Layout 1	Sample Layout 2	Sample Layout 2
Each full sized heated area is connected to one Standar Control Unit. Each heated zone is connected to its own Control Unit.	Two smaller areas are jumpered together and connected to one standard Control Unit.	Two full sized heated areas are connected to one double Control Unit (CBX23) as two separate closed loop systems.

ZMesh and Cold Lead Sample Layout for two separate zones connected to two separate Control Units.	ZMesh and Cold Lead Sample Layout for two separate areas connected in series by "jumpering" the areas together with Cold Lead.	ZMesh and Cold Lead Sample Layout for two separate loops connected to a 2X2 or 2X3 kVA Transformer. Note that two pair of Cold Leads are required for this configuration.



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Install the Cold Lead

ROUGH-IN

1.5 Run Cold Leads the total horizontal and vertical distance from the selected Back Plate or Rough-In Box placement location, to the location where the heating element will eventually begin and end. Pull the wire through holes drilled in the studs or through conduit, and secure both ends of the Cold Lead.

Install the Cold Lead through the back of the Back Plate, leaving approximately 14 inches protruding through the front of the Back Plate, and approximately 10 inches where the Cold Lead will connect to the heating element. If Cold Leads are shortened, the required markings must be retained.

IMPORTANT! Record the number of feet of Cold Lead that you have installed for each system here.

The following guidelines will help insure a proper and safe installation:

Cold Lead runs should be planned from the Tuff Cable or ZMesh heating element connection points to the Back Plate. Leave approximately 14 inches of Cold Lead protruding through the Back Plate, and 10 inches of extra Cold Lead wherever the connection between the Cold Lead and heating element will be made.

Do not kink the Cold Leads.

To minimize the size of the flux lines or lines of force of any magnetic field given off by the Cold Leads, always run Cold leads in pairs and as close to one another as possible. In order to minimize the potential for problems caused by any magnetic field given off by the Cold Leads, always avoid running Cold Leads in areas over, under, behind, or otherwise near the place where televisions and or computer monitors using Cathode Ray Tube technology will be located. Keep Cold Lead off of and out of metal ducts.

Place the Cold Leads on the same stud, or put both Cold Leads in the same conduit. When using conduit, always run Cold Leads in pairs in the same conduit. Never run individual Cold Leads in conduit.

Magnetic and non-magnetic metal studs require special consideration. Refer to a current edition of NEC for installation considerations.

The Cold Lead length and element length affect the Watts per square foot your system will deliver to the area where the Tuff Cable or ZMesh heating element is installed. If you have a question or concern, or if you are considering adding to the Cold Lead or heating element provided to you by Heatizon, contact Heatizon Systems or your Heatizon Distributor for more information.

Cold Leads are conductors; As as result grouping or banding of Cold Leads must be in accordance with NEC.

Do not insulate Cold Lead or any condut containing Cold Leads.

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CBX6 or CBX7 SYSTEM (SINGLE SIDED TRANSFORMER)		ROUGH-IN

Remember, CBX6 and CBX7 systems require one pair of Cold Leads for the beginning and ending points of heating element.
CBX23 SYSTEM (DOUBLE SIDED TRANSFORMER)

CBX23 systems require two pair of Cold Leads, one pair for the beginning and ending points of the first length of heating element, and the other pair for the beginning and ending points of the second length of heating ele ment (see illustration above). Each length of heating element must be approximately the same length. Refer to 2X2kVA or 2X3kVA System Operating Table in Section 8 for minimum and maximum lengths.
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COLD LEAD TO ELEMENT CONNECTIONS—	ROUGH-IN
Eventually, you’ll make connection from the Cold Leads to your chosen heating element. Make sure the Cold Lead has been properly installed to insure it can be connected to the ZMesh or Tuff Cable element later in the install process. See Section 7, “Making the Connection,” for specific connection instructions.
ROUGH-IN THROUGH SUB-FLOOR OR SUB-ROOF—FLOOR HEATING OR ROOF MELTING: When installing transition plates in floor heating installations and roof snow melt ing installations, extend Cold Lead up through sub-floor or sub-roof, leaving 10”, and anchor in place. Cold Leads should be spaced to accommodate the specific heating element to be used: 12” ZMesh = 14” apart 9” ZMesh = 11” apart Tuff Cable = 6” apart
ROUGH-IN THROUGH WALL— FLOOR HEATING OR ROOF MELTING: For wall installations of Transition Plates, an chor Cold Lead to sill plate and extend beyond face of finished material 10”. Cold Leads should be placed such that Transition Plates will never touch one another, and the tips of the Transition Plates should not be closer than 2” apart at the nearest point. Cold Leads should be spaced to accommodate the spe cific heating element to be used: 12” ZMesh = 14” apart 9” ZMesh = 11” apart Tuff Cable = 6” apart
ROUGH IN FOR TUFF CABLE SYSTEMS— SNOW MELTING OR INTERIOR SPACE HEATING: When installing Cold Lead in Tuff Cable heating or snow melt systems, Cold Leads should be placed such that connection points of E210BS Butt Splices are a minimum of 4” apart. Extend Cold Lead by 10” and se cure Cold Lead in place.
Cold Lead Rough-In in standard wood frame wall. Local building codes may require conduit.

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Install the Thermostat Wire

ROUGH-IN

1.6 Before you begin, read the specific wiring instructions and installation instructions provided for the activator selected. See the “Activation Devices” section of this manual and the instructions included in the activation device packaging for further details.

a.	Run the Thermostat Wire (M316) the total horizontal and vertical distance from the Back Plate placement location to the location selected for the Activation Device.
b..	Determine and provide the appropriate power if needed to the chosen Activation Device.
c.	Install sensors, if any, at this point, such as remote bulb sensors, floor sensors, or temperature moisture sensors..

Install the Electrical Service Requirements for the Control Unit

1.7 Run the appropriate line voltage wires the total horizontal and vertical distance from the distribution panel to the Back Plate or Rough-in Box in accordance with the NEC.

Electrical Service Requirements:

1/2 and 1 kVA Systems — Operate on 120 volt power. Systems using 120 volt service require a single pole, 15-amp minimum breaker, and use 12/2 conductors or equivalent.
2 and 3 kVA Systems — Require 208/240 volt service with double pole 20-amp breakers and 12/2 conductors or equivalent.
2X2, 2X3, 4, 5, and 6 kVA Systems — Require 208/240/277 volt service with double pole 30-amp breakers and 10/2 conductors or equivalent.

Note: All Heatizon Systems products require a dedicated circuit

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Jumpering		ROUGH-IN
1.8 At this point, it is necessary to plan out any jumpers that may need to be installed. A jumper is necessary whenever two adjacent detached areas are connected to one another, or whenever heating element will pass through any joint. Never install Cold Lead, Tuff Cable or ZMesh element where they bridge or extend through any joint, or mark, unless provision is made for expansion and con traction with a jumper. See Section 7, “Making the Connection,” for specific connection instructions.
a. Area to Area Jumper. It is not necessary that all heated areas be adjacent to one another. Jumpering between different areas can be accomplished by using an adequate amount of Cold Lead (E210) and two Transition Plates (E217) for ZMesh systems, or two Butt Splices (E210BS) for Tuff Cable systems.		b. Joint/Mark Jumper. Always jumper through every kind of joint/mark in all types of mortar, asphalt, mud bed, concrete, sand, or any other heatsink except Heatizon Heatsink Kit (CABSINKKIT).

ZMesh heating element can be jumpered by using an adequate length of Cold Lead and two E217 Transition Plates. All jumpering of element is to be done using Heatizon Cold Lead (E210) only.		Tuff Cable heating element can be jumpered by using a Heatizon Jumper Kit. All jumpering of element is to be done using Heatizon Cold Lead (E210) only. All Butt Splices (E210BS) must be imbedded in a heat sink.

		Congratualtions! You are now ready to install heating element!
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