Control Systems & PLC's

Heater Element

Electric Duct Heaters

A newely developed Neptronic electric duct heaters offer exceptional opportunity for efficient heating of commercial, residential and institutional ventilating ductworks.

NEP electric heaters have sensational features that make them the best in the industry. Our "Patent" HEC universal controller can operate without external inputs to provide maximum heat for variable air velocity and temperature conditions. Sensors are located close to the heating elements. The patent pending controller considers only convection heat and differential temperature to precisely measure air velocity and continuously update the proportional control signal to the heater. The result is an extremely precise control of heater output in different environments including VAV applications.

Neptronic manufactures heaters up to 1000 kW with up to 40 kW per sq.ft. to suit any application. Our heaters are approved for zero clearance to combustible materials and are safety tested and listed by "Underwriters Laboratories" (UL) and the "Canadian Standards Agency (CSA), and meet the requirements of the "National Electric Code". 

A variety of features are available to design the perfect and ideal heater which will satisfy your needs at "Competitive Pricing". 
 

· Open Coil (grade A and C), Standard Tubular and Finned Tubular elements. 

· Slip-In, Flanged and Round Collar mounting. 

· ON/OFF and Proportional (Modulating) Control. • ON/OFF and Proportional (Modulating) Control. 

· Input signals: 0-10 or 2-10 VDC, 4-20mA, 0-135 Ohms, Pulsed AC/DC. 

• Nema 1, 12, 4 and 4X Enclosures.

 

Here's a brief observation of the newly designed Electric Duct Heaters types:

OPEN COIL HEATING ELEMENTS: 
 
The open coil elements are the most popular in the industry, suitable for most standard HVAC ducted systems. The biggest advantage of these elements is the excellent heat dissipation capacity with heating capacities ranging from 0.5 to 1000 kW. 
 
Features of the Open coil elements

 

· Minimal pressure drop 

· Fast response time 

· Up to 40 kW per sq.ft. 

· Quick delivery 

 
The grade C open coil elements type is made up of nickel, chrome and iron. Neptronic® offers, for applications in humid environments, NiCr 80 (grade A) elements which do not contain any iron. 

 

STANDARD AND FINNED TUBULAR HEATING ELEMENTS:
 
The Standard and Finned tubular type offers an excellent mechanical resistance, suited for demanding environments. These elements are less sensitive to humid and dusty environments but offer a slower response time. 
 
Features of the standard and finned tubular elements
 

· Up to 13 kW per sq.ft. (Standard) and Up to 15 Kw per sq.ft. (Finned). 

· Heating elements not in direct contact with air. 

· Element of U or W shape. 

 
Tubular elements are made of Incoloy 800 (Nickel alloy) tube with a diameter of 3/8" (9.5mm) which contains a heating coil in magnesium oxide powder. Finned tubular elements have aluminum fins installed on the tube to allow a higher heat dissipation capacity. 
 
FRESH AND FORCED AIR HEATERS: 
 
NEP - Therm heaters are designed to complement heating systems of homes and offices by preheating fresh air or returned air with any existing central forced-air heating system. 
 
This electric duct heater is equipped with a modulating controller that allows operating in extremely low air flow with peak performance. 

 

Applications and features:
 

· Heat recovery ventilation system. 

· Central forced-air heating system. 

· Air make-up combined with a small fan. 

· Zone heater.... and more. 

· 6" or 8" collar; 1 kW to 5 kW at 120, 208 or 240 VAC. 

• 5 different kits of thermostat configuration available.

 

For additional information please visit http://www.northernindustrialsupplycompany.com/products/nep.html.

Oleg Tchetchel, Ph.D
Air Systems Engineer
NISCO
nisco@nisco.net
http://www.northernindustrialsupplycompany.com/burlington/index.html
http://www.northernindustrialsupplycompany.com/company.html

About the Author

Oleg Tchetchel
Designer of Air Moving Systems
Canadian Air Systems

http://nis-co.com/contact/Index.html

Dryer Repair- Replacing the Heater Element (Whirlpool Part # 3387747)