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Home TechTime May 2016 Electric Heaters
TechTime is a Neptronic publication aiming to inform you on the best ways to deal with common issues highlighted by our technical support team. Each edition features three new topics and will be posted on neptronic.com.

Yes, You Have Options!
Electric Duct Heater Options

Neptronic electric heaters are custom made to suit your specifications. Our proprietary web based software allows you to select from many options to make this custom heater most suitable for your application.

Installation Types
Need flanged heater frames? Besides "insert" (slip-in), we have two different flange types:
1" and 1.5".

VAV Application?
A transformer with 25 extra VA can be provided to power the VAV.

High Temperature Application?
For applications such as baking and drying, ask for " Process Heater ". These heaters are available up to 1000KW and can have a discharge temperature as high as 1,200°F (648°C). For more details, please see this article.


Low Duct Velocity?
Heaters come with either a mechanical airflow switch or electronic airflow sensor. At times, airflow in the duct could be too low to energize the airflow switch (below 250 fpm). For these applications select the electronic sensor option which will keep the heater energized down to 100 fpm. For more details, please see this article.


Cold Spots?
Neptronic provides an option to build heaters to accommodate cold spots . This is done at the design stage where blanking plates are added to the heater frame making the coil area smaller in order to increase velocity. This option is also used to avoid hot spots around thermal cut outs in case the duct or air handling unit has a large wall thickness. For more details, please see this article.

Application that requires stainless steel A to Z.
Based on locations and environmental conditions, some heaters are required to have frames, control panels and even heating elements all in stainless steel. Tubular and finned tubular elements are available in stainless steel. We also have Stainless Steel Terminals as an option where the element terminals and hardware are in stainless steel.

Safety?
Optional protective screens are available to prevent accidental contact with the elements. They can be installed on one side or both sides.

Control remotely?
An auxiliary switch can be provided as an option to remotely control another electrical device.

Turn The Fan ON
A fan relay can be added on the heater to send a signal to the fan starter, which will energize the fan.

Modulating Signal
Neptronic's universal HEC controller accepts any input signal available in the HVAC industry. Modulating heaters will be set with a 0-10Vdc signal by default. But 0-5Vdc, 2-10Vdc, 4-20mA or pulsed DC and AC signals can be set on site by moving jumpers . Simple as that! For more details on the HEC please read this article

Indicate The Problem
Pilot lights can be added to our heaters. These are color-coded lights for Power ON, Heating, Overheat, No airflow and Stages. Pilot lights are installed on the surface of the control panel.

Control Panel Exposed Outdoors?
Standard Nema1 control panel with galvanized steel is used for most indoor applications. For outdoor installations, Nema4 and Nema4X are suitable options. These come with stainless steel control panels, which provide protection from rain, snow, splashing water or hose directed water.

Control Panel Location
The control panel can be built with Left, right or center panel extensions (top, bottom and center for vertical heaters). The whole panel can also be mounted either on top or bottom of the frame. If absolutely no space is available on site, a remote panel option is available.

Too Cold, Too Hot?
When the control panel is exposed outdoors to extreme cold temperatures, it can create condensation inside the panel. Box insulation can be added between the panel and hot area to prevent any possible condensation on electrical components.

With so many different options available, we at Neptronic can better satisfy your needs. Contact your nearest agent for more details or visit our website at www.neptronic.com