®
Chromalox
Installation, Operation
DIVISION
SALES
SECTION
4
RADD
and
(Supersedes PG412-9)
PG412-10
REFERENCE
RENEWAL PARTS IDENTIFICATION
161-026681-001
DATE
DECEMBER, 2008
Specifications
!
The Safety Alert Symbol
sonal injury.
is used to indicate a risk of per-
A
B
Model No.
Volts
kW
Overall Length Heated Length
Please familiarize yourself with these instructions before
attempting to install or operate this Radiant Heater.
RADD-2164
RADD-2164V
120 or 240
208 or 275
120 or 240
208 or 275
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
1.6
24-3/8
30-5/8
35-7/8
46-5/8
53-7/8
61-3/8
65-7/8
73-3/4
79-7/8
85-3/4
106
16-1/2
22-3/4
28-5/16
38-1/2
45-7/16
53-3/8
58-1/4
65-3/4
72-1/4
78
RADD-3224
2.2
2.6
3.6
4.3
5.0
5.4
6.0
6.7
7.2
9.0
RADD-3224V
RADD-3264V
RADD-3264
RADD-4364V
RADD-4364
RADD-5434V
RADD-5434
Type RADD Electric
Radiant Heaters
RADD-5504V
RADD-5504
RADD-6544V
RADD-6544
RADD-6604V
RADD-6604
B
A
RADD-7674V
RADD-7674
RADD-7724V
RADD-7724
RADD-8904V
RADD-8904
RADD-7604X10
RADD-7604X13
RADD-7604X9A
RADD-7724X38
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
Before Installing:
1. Open carton and remove heater at the place of installation.
Mounting clamps are in parts bag in carton.
97-1/2
2. Check nameplate volt and watt rating against your power sup-
ply voltage and heating requirements of your installation. This
nameplate is located on one end of the heater.
240 or 480
240 or 480
240 or 480
240 or 480
8.0
10
11
13
114-1/8
141
160-5/8
185-5/8
106
132
150
174
The system designer is responsible for the safety
of this equipment and should install adequate
back-up controls and safety devices with their
electric heating equipment. Where the conse-
quences of failure could result in personal injury or
property damage, back-up controls are essential.
INSTALLATION
Clamp assembly may be attached to heater by sliding over end
or by snapping over top of extruded frame section at any point
along its length. (see Fig. 2) For proper heater support, the
maximum distance between clamps must not exceed 48”. On
extra-long heaters, more than two clamps are furnished.
3. Mounting Holes — When heaters are mounted adjacent to
each other in the same plane, note that distance between
mounting holes on framing to support heaters will be 3-11/16”
minimum. When heaters are not in the same plane, i.e., set at
an angle to one another, distance between mounting holes in
framing will be either greater or less than 3-11/16”.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed or serviced by a
qualified person in accordance with the National
Electrical Code, NFPA 70.
1. These radiant heaters are designed for indoor installation only.
2. Mounting Clamps — Mount heaters by using the mounting
clamp and 3/8” bolt assembly.
4. Framing — Where an extensive installation is being made, the
use of continuous slot metal framing manufactured by several
concerns will be of assistance in saving time and money. The
framing is reusable.
(Interlocking Connectors
Discontinued)
Figure 1 — Heater Parts and Dimensions
Figure 2
© 2010 Chromalox, Inc.
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WIRING (cont’d.)
11. Delta Connections — When heaters occur in multiples of
three, they may be connected to, and balanced across, three-
phase lines. The most commonly used connection is the delta
connection illustrated in Fig. 5. Three phase Delta connections
to minimize inductive effect in conduits are made per this dia-
gram. The rule: run all 3 three-phase conductors in the same
conduit as far as possible. For single-phase, run only two con-
ductors and follow the same rule.
Figure 5
OPERATION
2. SOLID STATE THYRISTOR POWER CONTROLLERS.
For best non-contact control of radiant heat, a Series #6
Chromalox Thyristor Power Controller with manual poten-
tiometer setting is recommended. Truly proportional output of
from 0 — 100% can be easily dialed-in to suit the particular
product or process requirements. The Series #6 panels are pre-
engineered, pre-packaged assemblies in an enclosure with cir-
cuit disconnect provided and ready for installation.
FIRE/EXPOSION HAZARD. This heater is not
intended for use in hazardous atmospheres where
flammable vapors, gases, liquids or other com-
bustible atmospheres are present as defined in the
National Electrical Code.Failure to comply can
result in personal injury or property damage.
B. Maximum Ambient Temperatures
Before energizing this heater:
Chromalox Radiant Heaters are not recommended for applica-
tions in ambient temperatures exceeding 450°F. Higher ambi-
ent temperatures mean shorter heater life.
1. Be sure all electrical connections are tightly made. Hold ter-
minal with pliers when tightening screw.
2. Be sure that all conductors are properly insulated.
3. Be sure that all element assemblies have been properly
replaced, and that secondary insulation bushings have not been
omitted.
Maximum work temperature in a given time depends on sever-
al factors: Reflectivity of work, specific heat of work, mass of
work, kW input and losses from oven, and time of exposure. As
work temperature increases, the work loses heat by radiation
and by convection to the surrounding ambient. Although it is a
general principle of Radiant Heater application that work tem-
perature conventionally exceeds ambient temperature, in cases
where extremely high work temperatures are desired, it is nec-
essary to enclose the heaters in order to increase the ambient.
If evaporation of a liquid is desired as a result of increasing
work temperature, it is necessary to provide ventilation air in
order to carry away the evaporated liquid. Under carefully
engineered circumstances, a maximum work temperature of
600°F may be attained.
A. Controlling Radiant Intensity
Standard Radiant heaters are built to operate at 40 watts per sq.
inch on the element sheath. When it is desired to reduce radiant
intensity, one or more of the following methods may be used.
1. INPUT CONTROLLERS. These motor-driven cycling
devices can be used to vary heater output capacity from 4 to
100%. They are usually connected in holding coil circuit of
controlling magnetic contactors. See Chromalox Radiant
Heater Manual for further information regarding Input
Controllers and Contactors.
MAINTENANCE
C. Care of Reflectors
Reflectors should be cleaned periodically. A mild soap and
water solution or fine cleaning powder is best although more
drastic means may be required if reflectors are badly soiled by
chemical or other deposits. The reflector is aluminum. DO
NOT use alkali cleaners since alkalies will dull reflector. Mild
non-alkaline cleaners, such as used for scouring kitchen sinks,
may be used. Reflectors are replaceable and may be purchased
from Chromalox.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed or serviced by a
qualified person in accordance with the National
Electrical Code, NFPA 70.
A. To Remove Heating Element
D. Because of the high temperatures involved, periodically check
and retighten heater terminal connections. This practice will
help to avoid “hot terminals” and the resulting damage to wire
insulation.
E. Because of the fire hazards resulting from a process malfunc-
tion, the related safety control used in the system should be
periodically checked to ensure its proper operation.
1. Remove terminal cover screws and terminal cover.
2. Disconnect heating element from electrical leads at both ends.
3. Remove screws from porcelain terminal blocks.
4. Remove element support clips and secondary insulating bushings.
5. Lift out elements.
B. To Install Element
Observe instructions for removing elements and proceed in
reverse fashion. Be sure to replace secondary insulating bushings.
-3-
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RENEWAL PARTS IDENTIFICATION
PARTS COMMON TO ALL HEATERS
3
4
5
Terminal Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306-014405-001 (2)
Terminal Cover Clip . . . . . . . . . . . . . . . . . . . . . . . . 056-014401-002 (2)
End Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220-014462-001†
220-014462-002
8
Terminal Screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . 248-046044-002 (4)
MISCELLANEOUS HARDWARE AND PARTS
9
Terminal Block (Bottom) . . . . . . . . . . . . . . . . . . . . 303-014317-001 (2)
Hexnut #8-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-049592-029 (2)
Terminal Block (Top) . . . . . . . . . . . . . . . . . . . . . . . 303-014316-001 (2)
Screw #8-32 x 2-1/4” long. . . . . . . . . . . . . . . . . . . 248-075512-390 (2)
Screw #8-32 x 3/8” long . . . . . . . . . . . . . . . . . . . . 248-075519-080 (4)
Screw #8-32 x 3/8” long . . . . . . . . . . . . . . . . . . . . 248-075512-053 (4)
Saddle Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238-026539-001 (4)
Jumper Strap
10
11
12
13
14
16
17
(furnished with RADD-7604X10 only) . . . . . . . . 166-075230-030 (2)
HEATER MOUNTING CLAMP ASSEMBLY
See Figures 1, 2, 3, and 4, page 1.
For mounting heater with model numbers up to RADD 7000, use mounting
clamp assembly part no. 168-013071-001. For mounting heaters above
model number RADD 7000, use mounting clamp assembly part no. 168-
013071-002.
† Indicates stamped end plate with voltage, wattage, etc.
NOTE: Part numbers suffixed by a number in ( ) indicates the quantity of the same part
number used.
19
PARTS COMMON TO LONGER HEATERS
(RADD-7604X13, RADD-7604X9A, and RADD-7724X38)
18
19
20
21
22
Conduit Support Bracket. . . . . . . . . . . . . . . . . . . . . . . . 059-036915-001 (5)
#12 Gauge leadwire, 8”long . . . . . . . . . . . . . . . . . . . . . 175-048142-171 (2)
4” Conduit Box, Octagonal . . . . . . . . . . . . . . . . . . . . . . 025-036918-001
Conduit Box Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 080-013160-004
1/2” 90° Angle Box Connector . . . . . . . . . . . . . . . . . . . 119-075455-002
1/2” Box Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . 119-075454-005
3/4 to 1/2” Reducing Washer . . . . . . . . . . . . . . . . . . . . 328-114681-001 (2)
23
26
27
Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303-117271-001
(includes terminal block and jumper straps)
Model
Number
1/2” Flexible
Steel Conduit
#10 Gauge
Leadwire
24
25
RADD-7604X13
RADD-7604X9A
RADD-7724X38
069-024328-011
069-024328-010
069-024328-012
175-048141-078
175-048141-077
175-048141-079
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RENEWAL PARTS IDENTIFICATION
Watts
per
Element
Element
Support
Clip
Bushing
15 Retaining
Clip
1
2
3
6
7
Model
Number
Element
Model Number
Reflector
Sheet
Terminal
Cover
Insulation
Bushing
Volts
120
208
240
275
RTU-2083A-120V (2)
RTU-2083AV-208V (2)
RTU-2083A-240V (2)
RTU-2083AV-275V (2)
RADD-2164
800
234-013411-011
234-013411-012
306-014405-001 (2)
————————–
————————– ————————–
120
208
240
275
RTU-3113A-120V (2)
RTU-3113AV-208V (2)
RTU-3113A-240V (2)
RTU-3113AV-275V (2)
RADD-3224
RADD-3264
RADD-4364
RADD-5434
RADD-5504
RADD-6544
RADD-6604
RADD-7674
RADD-7724
1100
1300
1800
2150
2500
2700
3000
3350
3600
4500
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
306-014405-001 (2)
————————–
————————–
032-013454-001 (4)
————————– ————————–
————————– ————————–
208
240
275
480
RTU-3133AV-208V (2)
RTU-3133A-240V (2)
RTU-3133AV-275V (2)
RTU-3133A-480V (2)
234-013411-013
234-013411-013
234-013411-013
234-013411-013
208
240
275
480
RTU-4183AV-208V (2)
RTU-4183A-240V (2)
RTU-4183AV-275V (2)
RTU-4183A-480V (2)
234-013411-014
059-014304-002
059-017175-001
208
240
275
480
RTU-5213AV-208V (2)
RTU-5213A-240V (2)
RTU-5213AV-275V (2)
RTU-5213A-480V (2)
234-013411-015
234-013411-015
234-013411-015
234-013411-015
032-013454-001 (8)
032-013454-001 (8)
032-013454-001 (8)
032-013454-001 (8)
059-014304-002 (2)
059-014304-002 (2)
059-014304-002 (2)
059-014304-002 (2)
059-017175-001 (2)
059-017175-001 (2)
059-017175-001 (2)
059-017175-001 (2)
208
240
275
480
RTU-5253AV-208V (2)
RTU-5253A-240V (2)
RTU-5253AV-275V (2)
RTU-5253A-480V (2)
234-013411-016
032-013454-001 (12)
059-014304-002 (3)
059-017175-001 (3)
208
240
275
480
RTU-6273AV-208V (2)
RTU-6273A-240V (2)
RTU-6273AV-275V (2)
RTU-6273A-480V (2)
234-013411-017
234-013411-017
234-013411-017
234-013411-017
032-013454-001 (12)
032-013454-001 (12)
032-013454-001 (12)
032-013454-001 (12)
059-014304-002 (3)
059-014304-002 (3)
059-014304-002 (3)
059-014304-002 (3)
059-017175-001 (3)
059-017175-001 (3)
059-017175-001 (3)
059-017175-001 (3)
208
240
275
480
RTU-6303AV-208V (2)
RTU-6303A-240V (2)
RTU-6303AV-275V (2)
RTU-6303A-480V (2)
234-013411-018
032-013454-001 (16)
059-014304-002 (4)
059-017175-001 (4)
208
240
275
480
RTU-7333AV-208V (2)
RTU-7333A-240V (2)
RTU-7333AV-275V (2)
RTU-7333A-480V (2)
032-013454-001 (16)
032-013454-001 (16)
032-013454-001 (16)
032-013454-001 (16)
059-014304-002 (4)
059-014304-002 (4)
059-014304-002 (4)
059-014304-002 (4)
059-017175-001 (4)
059-017175-001 (4)
059-017175-001 (4)
059-017175-001 (4)
234-013411-006*
and
234-013411-015*
208
240
275
480
RTU-7363AV-208V (2)
RTU-7363A-240V (2)
RTU-7363AV-275V (2)
RTU-7363A-480V (2)
234-013411-004*
and
234-013411-012*
032-013454-001 (20)
059-014304-002 (5)
059-017175-001 (5)
208
240
275
480
RTU-8453AV-208V (2)
RTU-8453A-240V (2)
RTU-8453AV-275V (2)
RTU-8453A-480V (2)
234-013411-049 (2)
234-013411-049 (2)
234-013411-049 (2)
234-013411-049 (2)
032-013454-001 (20)
032-013454-001 (20)
032-013454-001 (20)
032-013454-001 (20)
059-014304-002 (5)
059-014304-002 (5)
059-014304-002 (5)
059-014304-002 (5)
059-017175-001 (5)
059-017175-001 (5)
059-017175-001 (5)
059-017175-001 (5)
RADD-8904
RADD-7604X10
240
4000 RTU-7303AX10-240V (2)
5000 RTU-7303AX13-240 (2)**
5500 RTU-7303AX9A-240 (2)**
6500 RTU-7363AX38-240 (2)**
234-013411-016 (2)
243-013411-058 (3)
234-013411-057 (4)
234-013411-059 (4)
306-014405-001 (2)
306-014405-002 (2)
306-036916-003 (2)
306-036916-003 (2)
023-013454-001 (24)
032-013454-001 (23)
032-013454-001 (32)
032-013454-001 (32)
059-014304-002 (8)
059-014304-002 (8)
059-014304-002 (8)
059-014304-002 (8)
059-017175-001 (6)
059-017175-001 (9)
059-017175-001 (10)
059-017175-001 (11)
RADD-7604X13 240 or 480
RADD-7604X9A 240 or 480
RADD-7724X38 240 or 480
*For ease of installation, these reflectors shipped in two pieces (one each of part numbers listed).
**Shipped as 480V. Convert to 240V by changing jumpers. See WIRING Section on page 2.
NOTES:
1. Part numbers suffixed by a number in ( ) indicates the quantity of the same part number used.
2. Intelocking connector parts have been discontinued.
-5-
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Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
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