The Control Unit is the brains of the Heatizon System, and contains all of the system safeties and provides for a soft start to the Transformer. Mak sure the primary power to the Control Unit is still off before proceeding with Control Unit Installation.

Locate Power Supply and Thermostat Wire. Run the power supply conductor through the round hole in the upper left corner of the Control Unit. Run the Thermostat Wire through the round hole in the lower center of the Control Unit.

Mount Control Unit. The Control Unit will mount on the left side of the Back Plate. Rotate the Control Unit so that the switch is at the top. Make certain that the power supply conductor and Thermostat Wire pass through access holes in the Control Unit and are not behind it. Carefully slide the Control Unit back over the bushing around the power supply line. Mount the Control Unit to the Back Plate using two (2) #6-32x3/8" screws provided in Hardware Kit.

Connect Power Supply to Control Unit. Once again, verify that the primary power at the circuit breaker is in the “Off” position. Cut the primary power wires that come from the service panel to the desired length. Strip ½ inch of insulation from end of each wire. Connect the power supply wires to the black wires from the Control Unit. Using the Primary Power Supply tables below. Locate power supply wire locations on the CBX6 and CBX23 Mother Board or the CBX7 Power Board with diagrams, right. Use the provided #10 insulated Butt Splice Connectors or wire nuts to make these connections.

Connect Transformer to Control Unit. Once the primary Transformer wires are installed through the Control Unit side plate, strip 1/2” of wire insulation off each end, and connect one of the two primary wires of the Transformer to each of the two orange wires in the Control Unit using the provided #10 insulated Butt Splice connectors or wire nuts. It is not necessary to observe polarity when making this connection. Cap with wire nut not used wire. Use the label information on the transformer to select the proper wiring for the supply voltage you are using. Cap off unused wires individually with a provided wire nut.

Connect Thermostat Wire. Cut the Thermostat Wire to desired length. Strip about 2” of outer jacket from end of cable. USE CAUTION WHEN STRIPPING OUTER JACKET. DO NOT CUT OR NICK INDIVID UAL WIRES. Strip 3/4 inch of insulation from each of the Red, White, and Green wires in the cable and connect them to the terminals labeled R, W, and G located in the lower left-hand section of the Control Unit Mother Board. Place the wire under the left hand side of the terminal screw, and tighten in the clockwise direction.

If you have a CBX6T or CBX23T and use an Activation Device that requires 24VAC power, strip 3/4” from the Blue and Yellow wires, and connect them to the terminals labeled B and Y. Place wire under screw in a clockwise direction and tighten.

Connect Thermistor. (CBX6 and CBX23 Control Units Only) The Overtemp Sensor, also known s a thermistor, senses the Transformer operating temperature and will turn off the system if the temperature exceeds the Transformer’s rating. Connect the end of the thermistor to the P2 terminal on the Mother Board and then pass the black bulb of the thermistor through the bushing in side of Control Unit panel and into the Transformer cavity. Insert the black bulb of the thermistor into the space between the laminations and the belly of the Transformer.

Connect Torroid. Pass the end of the torroid through the bottom opening in the Control Unit board mount plate, and connect it to the P3 terminal on the CBX6/23 Control Unit Mother Board, or to the J3 terminal on the CBX7 Power Board.

Check all Connections. Check all connections at this time for tightness and proper location. Check screws on the SCR and tighten as needed.

Set the JP12, JP13, and JP14 jumpers on the Control Board before installing Control Board into the Mother Board using the tables below. Refer to Input Voltage Select Table below for jumper locations on the Control Board.

Verify that all jumpers are installed on the appropriate settings for your specific application before inserting Control Board into the Mother Board of the Control Unit.

Control Boards have been preset at the factory on the JP13 208/240V incoming power setting, and the JP5, JP7, JP9, and JP11 settings for Tuff Cable Heating Element or for ZMesh Heating Element when being used for snow melt and roof deicing applications . If your application uses 120VAC or 277VAC incoming powers and/or ZMesh Heating Element is being used for interior applications, the jumpers may need to be repositioned. If using 240VAC incoming power and Tuff Cable heating element, verify that the factory installed jumpers are on appropriate settings.

Make certain that the primary power to the Control Unit is off, and then insert the Control Board fully into the edge connector, making certain that the components on the Control Board are facing left.

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Verify that the outer two black leads from the 16VAC Control Transformer primary which were connected to terminal JP12 at the factory, and the two orange secondary leads which were connected to terminal JP4 on the Power Board are still connected.

Connect the chosen activation device to pins 1 and 3 on terminal J2 on the Power Board . The system will operate with any of Heatizon Systems activation devices.