Heatrex custom manufactures TUBULAR & FINNED TUBULAR
HEATING ELEMENTS, IMMERSION
HEATERS, DUCT HEATERS,
UNIT HEATERS & CIRCULATION
HEATERS
Products Tubular & Finned Tubular
Heating Elements Electric Immersion
Heaters Enclosure Heaters/
Switchgear Heaters Process Duct Heaters Circulation Heaters Refrigeration Defrost
Heaters Bolt Heaters/Flexible
Heaters HVAC Electric Duct
Heaters Unit and Comfort Heaters Explosion-Proof Heaters Impedance Heating
SystemsBlog
Heatrex
P.O. Box 515,
Meadville, PA 16335
Phone: (814) 724-1800
Fax: (814) 333-6580
E-mail: sales@heatrex.com
www.heatrex.com Privacy  |  Sitemap
All Categories > Explosion-Proof Heaters > Explosion-Proof Duct Heaters > 227 Series Explosion-Proof Duct Heaters > Item # HX-227F30A  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites

Item # HX-227F30A, 227 Series Explosion-Proof Duct Heaters


  • CSA Approved for virtually all Class I and Class II, Division 1 and 2 hazardous gas or dusty atmospheres
  • Ignition temperatures as low as 320°F (160°C)
  • Six standard sizes to fit a wide range of ducts with twenty four available sizes.
  • Ratings up to 240 kW, 600 volts




Specifications  · Temperature Control

Specifications

Unit Size Code
A

Min. Duct Power
3 kW

Max. Duct Power
10 kW

Min. Inside Duct Dimensions (W x H)1
12 x 12 inches
30.5 x 30.5 cm

Max. Inside Duct Dimensions (W x H)2
18 x 24 inches
45.7 x 61 cm

Depth
8 inches

Weight
130 lb

Custom Options

 View
C - Corrosion Resistant Construction
D - Built-on Disconnect Switch
F - Supplementary Fusing
G - NEMA 4 Construction
K - "Warning" Pilot Light
L - "Heater On" Pilot Light
M - Disconnecting Magnetic Contactors
P - Built-on Airflow Switch
V - 120 Volt Control Circuit
Z - Group B Construction
1 Use only Minimum W x H dimensions for minimum air velocity calculations.
Duct height and width can vary independently of minimum and maximum dimensions.
2 Consult factory for availability of other maximum inside duct dimensions.
Duct height and width can vary independently of minimum and maximum dimensions.


Temperature Control
    Single Stage Control - For many lower KW applications, single stage on/off control is adequate. For higher KW ratings, solid-state SCR control is recommended.

    Solid-State SCR Control - When temperature must be controlled precisely, or for larger kW heaters, built-in SCR’s are recommended. They are furnished with field-selected inputs of 2200 or 135 ohms, 0-10 VDC, or 4-20 mA. SCR's have zero-cross firing to eliminate radio frequency interference.
    To meet FM and CSA requirements, multi-unit designs (up to four heating units in series) also have controls set at 80°F (27°C) to limit the inlet air temperature to all but the inlet unit. These limit controls prevent excessive temperatures at the heater outlet as the inlet air temperature rises.


 MORE IMAGES 

·  Series 227 Dimensional Drawing

·  Parallel 3 View Dimensional Drawing

·  Single 3 View Dimensional Drawing


 DOWNLOADS 

Explosion-Proof Duct Heater Engineering Information
(PDF, 238KB)


Heatrex