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Home Electric Heaters Open Coil

Open Coil Electric Heaters

Open Coil Open Coil - Open Coil
  • Excellent heat dissipation
  • Minimal pressure drop
  • Fast response time
  • Up to 40kW / sq.ft.
HECB Networkable Controller Open Coil - HECB
  • BMS Integration
  • Save energy
  • Monitor alarms
  • Remote diagnostics
Patented EAS Open Coil - EAS
  • Patented Electronic Airflow Sensors (EAS)
  • No mechanical switch required
  • Detects as low as 100 FPM
  • Automatic load shedding
Installation Options Open Coil - Options
  • Slip-in, flanged, or round
  • Vertical or horizontal mounting
  • Selectable control panel configurations
  • Selectable enclosure rating

  • Open Coil

    Electric Heaters

  • HEC / HECB

    Heater Controller

  • EAS

    Patented Electronic
    Airflow Sensors

  • Options

    Mounting & Control
    Panel Options
Tech Time
Open Coil – Electric Heaters

Open Coil Electric Heaters

Most popular in the industry

Suitable for most standard HVAC
ducted systems

Heating capacities from 0.5 to 1000kW
(larger loads also available)

Up to 40kW per sq.ft

Integrated HEC controller

Patented EAS
(Electronic Airflow Sensors)

Open Coil Elements Options

Grade C NiCr60 (60% Nickel and 16% Chrome)

Grade A NiCr80 (80% Nickel and 20% Chrome)

Recommendations

For applications in a humid environment, we recommend the optional NiCr80 (grade A) elements.
They are composed of 80% Nickel and 20% Chrome (does not contain iron).
This will allow a maximum operating temperature of 2 100˚ F (1 150˚ C) and installation where condensation may be present in the air duct.

  • HECB - Networkable Controller
  • HEC - Standard Controller

What's New

BMS Integration BACnet Energy Management Monitor Alarms Remote Diagnostics Auto Load Shedding
BMS
Integration		 BACnet & Modbus
(selectable)		 Energy
Management		 Monitor
Alarms		 Remote
Diagnostics		 Auto
Load Shedding

Awards

MCEE award H15 award BCIA award

Overview

Heater

Supply and Discharge Sensors

Used to calculate a true ΔT by
eliminating the offset from radiant
heat. Two Neptronic STC8-11 duct
temperature sensors included.

Patented EAS

No mechanical air flow switch
required. Electronic Airflow Sensors
(EAS), enable the heater to shut off
if air flow too low.

BMS Integration

Integrate with a BMS and intelligent
buildings via BACnet MS/TP or
Modbus to propel you towards
the Internet of Things (IoT)

Remote Monitoring

Perform energy management, alarm
monitoring and remote diagnostics
even without integrating with a BMS.

Real-Time Clock (RTC)

Enables real-time data, trending,
and scheduling.

Remote User Interface (TRL24)

Displays alarms, room temperature,
setpoint, status and demand.

Built-in Current Transducers

Calculates real-time power
consumption (kW) data.

Benefits

Save Energy

  • Embedded and configurable energy conservation strategies
  • Automatic or dynamic load shedding
  • Limit electric heater consumption based on multiple variables
  • Provides real-time temperature measures and power consumption data

Save Time

  • View heater status and alarms remotely via network or thermostat
  • Remote monitoring (status, alarms, diagnostics, and trending)
  • Wall-mount remote user interface (view temperature, setpoint, heater status and alarms)

Integrate

  • Integrate with BMS and intelligent buildings via BACnet MS/TP or Modbus
  • Multiple BACnet/Modbus points to propel you towards the Internet of Things (IoT)
  • Ensure better management of energy consumption for the future

Standard Features

  • Accepts any industry standard input signal
  • Quick and simple input signal selection via DIP switches
  • Modulating, on/off, and/or up to 10 stages
  • Real-time feedback output of heater capacity
  • Automatic PID
  • Remote feedback with TRL54 or TRL24 LCD thermostat (eliminates the use of expensive staged thermostats)
  • Zero voltage crossing SSR
  • Patented EAS Electronic Air Flow Sensors
    (US 7,012,223)

Network Communication

  • BACnet MS/TP or Modbus RTU (selectable via menu)
  • Select MAC address via DIP switch or via network

BACnet MS/TP

  • MS/TP @9600, 19200, 38400 or 76800 bps
  • BACnet scheduler (up to 6 events)
  • Firmware upgradeable via network
  • COV (change of value)
  • Copy and broadcast configuration to other HECB controllers via menu or network
  • Automatic baud rate detection
  • Automatic device instance configuration

Modbus RTU

  • Modbus RTU @9600, 19200, 38400 or 57600 bps
  • RTU Slave, 8 bits (configurable parity and stop bits)
  • Connects to any Modbus RTU master

Standard Features

  • Accepts any industry standard input signal
  • Quick and simple input signal selection via DIP switches
  • Modulating, on/off, and/or up to 10 stages
  • Real-time feedback output of heater capacity
  • Automatic PID
  • Remote feedback with TRL54 or TRL24 LCD thermostat (eliminates the use of expensive staged thermostats)
  • Zero voltage crossing SSR
  • Patented EAS Electronic Air Flow Sensors
    (US 7,012,223)

Up to 10 Stages

There’s no need to purchase expensive staged thermostats, the HEC controller enables you to setup up to 10 stages.

ten stages
hec chip

Control Modes and Input Signals

Control Mode Input Signals
External
Demand:
 
 		 Analog signal from TRO5404
or other controller:
0-10Vdc, 2-10Vdc, or 4-20mA
Internal
Temp: Room STR1-11 or Duct STC8-11
Setpoint: On-board potentiometer
Demand: HECF controller
Temp & Setpnt: TRL54, or TRL24
Demand: HECF controller
Temp: Duct STC8-11
Setpoint: TRL24
Demand: HECF controller
TPM
Demand: 0 to 5V dc pulse
Neptronic Signal
Demand:
 
 
 		 IT03-11 (setpnt) +
STC8-11 (duct temp)
or
STS3-11 (setpnt)
Pneumatic Direct or reverse acting 0-15 PSI (0-103 kPa)
Factory set from 1-15 PSI (7-103 kPa)
Remote
Demand: BACnet network
All of the above 24Vac digital pulse, or ground digital DC pulse

          
= requires HECB Networkable Controller

Patented EAS

Electronic Airflow Sensors (US Patent 7,012,223)

Accepts any industry standard input signal
In this example there is a demand for 6kW, which requires a minimum 500FPM.

Precise air velocity readings (as low as 100 FPM)
Using both temperature sensors and other known values, the HEC controller calculates the precise air velocity. These readings can go as low as 100 FPM, which is excellent for VAV applications. In this example it is 200 FPM.

Load shedding: overrides demand if velocity is insufficient
Protects elements from overheating and eliminates unnecessary shutdowns if velocity is insufficient for actual demand. In this example, the demand of 6kW requires a minimum 500 FPM, but the HEC controller detected an actual velocity of 200 FPM. The HEC controller lowers the output to 2 kW for 200 FPM. As opposed to air flow switches that simply shutdown the heater.

Additional overheat protection.
If heater element is too hot or if there is no air flow, electronic shutdown of the heater prevents cycling of the contacts. This is in addition to the thermal cut-off.

No air flow switches required
The velocity is calculated using the factory installed temperature sensors and built-in algorithms. Using the temperature readings, the HEC controller also automatically determines the orientation of the air flow. This saves cost and reduces labour as expensive air flow sensors are not required and there is no need to fine tune air flow switch positioning.

  • Installation Options
  • Control Panel Options
  • Enclosure Ratings

Slip-In

For entire frame to be inserted in the duct

Flanged

For heaters to be an integral part of the duct work

Round collar

For round duct systems of 6" to 24" (152mm to 609mm) diameter

No need to define air flow orientation  Designed for Vertical or Horizontal Mounting

Vertical

Horizontal

Bottom Control Panel

for easy installation and maintenance

Insulated Control Panel

for high duct temperatures. Insulated material, 1” thick, is installed between the panel

Remote Control Panel

for installing the control panel remotely from the heater or in a separate room

Indoor Use

*NEMA Type 1 (IP10)

Incidental contact

Falling dirt

NEMA Type 12 (IP52)

Incidental contact

Circulating dust

Falling Dirt

Lint

Fibers

Flyings

Driping

Light splashing of liquids

Indoor / Outdoor Use

NEMA Type 4 (IP56)

Incidental contact

Falling dirt

Rain

Sleet

Snow

Windblown dust

Splashing water

Hose-direct water

External formation of ice

NEMA Type 4X (IP65)

Incidental contact

Falling Dirt

Rain

Sleet

Snow

Windblown dust

Splashing water

Hose-directed water

Corrosion

External formation of ice

Louis Banner

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