Chromalox TDH Catalog Page
TDH
Process Air and Radiant
Medium Temperature
Air Duct Heater
• 6 - 60 kW
• 240 and 480 Volt
• Three Phase
• INCOLOY® Sheath Elements
• 750°F Max. Outlet Air Temp.
Applications
Heat Air for Drying and Curing Operations up
to 750°F Air Temperature, Heat Treating, Reheating or Dehumidification, Booster Heater
in Heating Ducts and Ovens.
Construction
U-Shaped Tubular Elements with INCOLOY®
sheath are mounted in a heavy gauge steel
flange with 9/32" diameter mounting holes for
attaching to duct work. All terminal connections are of high-temperature alloy construction and are enclosed in an aluminum painted
steel housing.
Features
Steel flange is equipped with special holes to
permit easy replacement of individual element.
Sheet steel terminal box may be removed to
facilitate wiring during installation.
All Heaters can be mounted in any position;
top, side or bottom entry. In high ambient
temperature operations, least corrosive action
and least oxidation to the terminals will occur
if heaters are mounted with terminals in the
coolest possible ambient, usually on bottom
Dimensions (Inches)
9/32" Dia.
Mtg. Holes
10-1/2
11-1/8
8-11/16
or side of duct. Minimum duct size is
A dimension plus 3/8" or 11-1/8" plus 3/8"
and B dimension plus 1-5/8".
Wiring — Terminals on field wiring con-
nections are located in circular junction box
outside of heating zone. Alloy wire or buss bar
must be used for power connections.
Maximum Sheath Temperature — 1150°F.
Application & Selection Guidelines
Maximum Work Temperatures — Type TDH
heaters can generally be used at the following
maximum temperatures, without exceeding
their capability, if properly installed according
to instructions packed with heaters.
Air Velocity
(Ft./Sec.)
6 650
9 700
16 750
Note — Maximum work temperatures are
based on 22 W/In
2
. If elements have a lower
watt density, output air temperature may
Max. Output
Air Temp. (°F)
3-5/8
X
3-1/2
(Typ.)
X
F
M
A
D
be increased but not to exceed 750°F. If watt
density is higher, output air temperature
should be lower.
Note — See Allowable Watt Density & Heater
Selection Graphs and Pressure Drop Curve
G-227-2 in the Technical section of this
catalog.
Options
Replacement Elements — Order model number TI-43X752, 240V, 1000W (PCN 282781).
Explosion-Resistant Terminal Enclosure is
available for hazardous area applications.
Overtemperature Protection
Connections
Bolts
ARC
Thermal
Cutout
Probe
Downstream
C
B
Specifications and Ordering Information
No.
kW Volts W/In
6 240/480 22 6 2-1/2 5-5/8 20-3/8 26-15/16 4 1/4 5 TDH-6C AS 260785
12 240/480 22 12 3-1/2 7-5/8 20-3/8 26-15/16 6 1/4 7 TDH-12C AS 260822
18 240/480 22 18 3 9-5/8 20-3/8 26-15/16 8 1/4 9 TDH-18C AS 260865
24 240/480 22 24 2-3/4 11-5/8 20-3/8 26-15/16 10 1/4 11 TDH-24C AS 260902 260929
30 240/480 22 30 3-1/4 13-5/8 20-3/8 26-15/16 12 1/4 13 TDH-30C AS 260945 260961
36 240/480 22 36 3-3/4 15-5/8 20-3/8 27-5/8 14 3/8 15 TDH-36C AS 260970 260988
42 240/480 22 42 4-1/4 17-5/8 20-3/8 27-5/8 16 3/8 17 TDH-42C AS 260996 261008 69
48 240/480 22 48 4-3/4 19-5/8 20-3/8 27-5/8 18 3/8 19 TDH-48C AS 261016 261024 78
54 240/480 22 54 5-1/4 21-5/8 20-3/8 27-5/8 20 3/8 21 TDH-54C AS 261032 261040 87
60 240/480 22 60 5-3/4 23-5/8 20-3/8 27-5/8 22 3/8 23 TDH-60C AS 261059 261067 96
Stock Status: S = stock AS = assembly stock NS = non-stock
To Order—Specify model, PCN, kW, volts and quantity.
2
Elem.
Dimensions (In.)
Model Stock
1. Heater has UL component recognition;
UL versions of larger sizes are available.
E-16
PCN
1
260806119
1
260849126
1
260881134
1
1
1
Wt.
(Lbs.)X A B C D F M 240V 480V
42
51
60
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