Electric Duct Heater Scr Control

Since the scr is solid state it.

Electric duct heater scr control.

Heavy gage g60 construction with hinged access cover. Capacity and stages are dependent on voltage phase and heater dimensions. A transformer with any overcurrent protection required by ul or the nec to supply the internal control circuit of 120 volts per heater with a step controller for vernier control and 24 volts for all other heaters with scr control. Fuses to protect each circuit in any heater drawing more than 48 amps.

Upon restoration of power the step sequence resumes. Standalone coils supplied as duct heaters are certified in compliance with ul 1996. Automatic reset thermal safety switch for primary over temperature protection. This duct heater features.

This gives smooth infinitely variable application of power to the heaters. Price electric coils are factory mounted etl listed to meet electrical safety standards and comply with dual designation csa 236 ul 1995. When interruption of power occurs all stages cycle off. Power and control terminal boards.

Phase angle fired zero voltage switched and on off control. Thermolec electric duct heaters are designed for use in all forced air commercial and industrial hvac systems. Our heaters and controls range from standard duct heaters to the most sophisticated custom designed comprehensive systems. Indeeco s attention to detail and rigorous testing give worldwide customers premium products that they receive quickly and at a fair price.

Useful for electric reheat and supplemental electric duct heaters. Electric reheat coils are an available accessory for use with price single duct and fan powered terminal units. An electronic step controller provides electronic sequencing control of an electric duct heater up to 12 steps. A silicon controlled rectifier scr is a solid state switching device which can provide fast infinitely variable proportional control of electric power.

These controls proportionally turn on a percentage of each power line half cycle. Viconics r820 scr power controller has been designed for safe and reliable control of electric heat loads. Scr power control in depth. Not only does this give maximum control of your heat process but it can extend heater life many times over other control methods.

Manual reset thermal safety switch for secondary over temperature protection. Scr pictured solid state relays are used to provide continuous modulation.