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TechTime is a Neptronic publication aiming to inform you of common issues highlighted by our technical support team and the best way to deal with them. Each edition features three new topics and will be posted on neptronic.com.

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Turn ON / Turn OFF – Depends on Your Signal

HEC Signal Output and Troubleshooting

Neptronic's universal heater controller, known as the HEC is an integral part of our electric heaters.  The HEC accepts any control input signal available in the HVAC industry and converts it to either a modulating output to the solid state relays and/or to a staged on-off signal to the electric heater relays. If you have a modulating heater but do not have a modulating signal on site, this should not be a problem. Click here to learn more.


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Patrick Victor

Technical Support – Electric Heaters

Contact him at this email address pvictor@neptronic.com

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Humidity Control 101

Proportional Band – VAV System – Low Signal Selector


How does the Low Signal Selector (LSS) work?  Here is an explanation of the different operations behind the LSS, found in our HRO20 (wall mount humidity controller) and in most of our SK models. Click here to learn more.


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David Wong

Technical Support – Humidifiers

Contact him at this email address david@neptronic.com 

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It's All About the Curves

Choosing the right temperature sensor


There are many temperature sensors on the market and it can be challenging to choose. To simplify, we can break it down into three categories: class, resistance, type or curve. Click here to learn more.



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Patrick Lafrance

Technical Support – HVAC Controls

Contact him at this email address patrick.lafrance@neptronic.com