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Greenheck IDHB Installation, Operation And Maintenance Manual
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Greenheck IDHB Installation, Operation And Maintenance Manual

Duct heaters
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Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
These instructions apply to zero clearance installation of electric duct heaters within ducts. They are approved for
use with heat pumps, air conditioners, or other forced air systems and may be controlled by contactors, relays,
sequencers, or solid state devices.
Greenheck duct heaters are pre-wired, factory tested, and furnished with integral controls.
Receiving and Handling
Upon receiving heater, check for both obvious and
hidden damage. Check all insulators for breakage and
inspect heater element wire(s) for any deformation
or damage that could cause a sort circuit to
ground. Make sure all fasteners are tight. Electrical
connections such as pressure terminals should be
checked for tightness. If damage is found, record all
necessary information on the bill of lading and file
a claim with the final carrier. Check to be sure that
all parts of the shipment, including accessories, are
accounted for.
Heaters must be kept dry and clean. Indoor storage
and protection from dirt, dust and the weather is
highly recommended. Do not store at temperatures in
excess of 100°F (38°C).
Safety Warning
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury
or death. Read the installation, operating, and
maintenance instructions thoroughly before installing
or servicing this equipment.
This manual is the property of the owner and is required for future maintenance. Please leave it with the owner when
the job is complete.

Table of Contents

General Information . . . . . . . . . . . . . . . . . 1
Electrical Requirements. . . . . . . . . . . . . . . 2
Minimum Air Velocities . . . . . . . . . . . . . . 2-3
Installation. . . . . . . . . . . . . . . . . . . . . 4-5
Insulated Duct Installation . . . . . . . . . . . . . 6
Troubleshooting Guide . . . . . . . . . . . . . . 8-9

General Information

IDHB and IDHE series are intended for installation
in accordance with electric heaters requirements
established by:
National Fire Protection Association
NFPA Standards 90A and 90B
NFPA Standard 70
"UL Listed (see complete marking on product)
ANSI/UL Standard 1996 (File E366239)
Refer to:
"Installation Supplement for Outdoor Heater
Applications (Document #484166) for additional
details.
Document 478052
IDHB and IDHE
Duct Heaters
Electric Duct Heaters
1

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Summary of Contents for Greenheck IDHB

  • Page 1: Table Of Contents

    Greenheck duct heaters are pre-wired, factory tested, and furnished with integral controls. Table of Contents General Information ....1 Electrical Requirements.

  • Page 2: Electrical Requirements

    Replacement parts must be identical to the original components. Contact factory for replacement parts. IDHB: Minimum Air Velocity Minimum Air Velocities The minimum uniform airflow in a duct heater is directly related to the inlet air temperature. Consideration must...
  • Page 3 IDHE: Air Flow Requirements Minimum Air Velocity: See charts below Maximum Inlet Air Temp: 110°F Maximum Heater KW: 30 KW per Square Foot of Duct Cross Section Electric Duct Heaters...

  • Page 4: Installation

    Heaters are approved for airflow in both directions when installed in horizontal 1" duct. 1" IDHB: Heaters installed in vertical ducts are tested and WRAPPER approved for up airflow only! WRAPPER IDHE: Heaters installed in vertical ducts are tested and approved for up and down airflow.
  • Page 5 Figure 3: IDHE orientation Airflow Switch: When furnished, ensure the airflow switch is plumbed appropriately for the given duct condition. The pickup tube must be connected to the switch port labeled “LOW” if the duct is negatively pressurized and the opposite port if positively pressurized.

  • Page 6: Insulated Duct Installation

    Insulated Duct Installations Duct with External Insulation The external insulation is to be removed from the area where the heater is mounted. Note: Size of heater is based on the duct size (no recess required). Duct with Internal Insulation S-type with internal insulation left in place or duct constructed from insulation board Note: Size of heater is based on the following: Heater ‘H’...

  • Page 7: Installation Details With Ssr Controllers

    Installation Details for Electric Duct Heaters Equipped with SSR’s (including SSR Vernier Control) SSR controlled heaters will need to be supplied with a 0 to 10 VDC, 2 to 10 VDC, or a 4 to 20 mA signal generated from the building’s automation system or a local thermostat.

  • Page 8: Troubleshooting Guide

    Troubleshooting Guide A duct heater must be installed according to the 10. Never use aluminum conductors. Use copper installations instructions, wiring diagram and labeling conductors only for all incoming wiring. supplied with the heater. 11. Never install a standard heater outdoors without making special provisions to protect the heater Listed below are some important items when installing and control box from the elements.
  • Page 9 HEATER Troubleshooting Guide cont..FIGURE 9 Humidifier AIR FILTER 48" MIN. 48" MIN. 48" MIN. DUCT DUCT HEATER CORRECT HEATER FIGURE 10 Air Filter DUCT HEATER INCORRECT DUCT W/ INTERNAL INSULATION FIGURE 7 DUCT W/ INTERNAL INSULATION Transition Change DUCT W/ INTERNAL INSULATION AIR HANDLER 48"...
  • Page 10 Notes Electric Duct Heaters...
  • Page 11 Notes Electric Duct Heaters...
  • Page 12 As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Product warranties can be found online at Greenheck.com, either on the specific product page or in the literature section of the website at Greenheck.com/Resources/Library/Literature.

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