Chromalox
SERVICE REFERENCE
Installation, Operation
DIVISION
SALES
4
SECTION RAD
and
(Supersedes PG404-9)
PG404-10
REFERENCE
RENEWAL PARTS IDENTIFICATION
161-048215-001
DATE
APRIL, 2005
Type RAD (Style 3B) Electric Radiant Heaters
!
The Safety Alert Symbol
risk of personal injury
is used to indicate a
Before Installing
1. Open carton and remove heater at the place of installation.
Familiarize yourself with these instructions before attempting
Mounting clamps are in parts bag in carton.
to install or operate this Radiant Heater.
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.
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.
Specifications Table –
Length (In.)
Volts
kW
Model
Overall
13-5/8
20
Heated
7-3/4
RAD-2063BX35
RAD-2063BX29
RAD-2083B
RAD-2083BV
RAD-3113B
RAD-3113BV
RAD-3133BV
RAD-3133B
RAD-4183BV
RAD-4183B
RAD-5213BV
RAD-5213B
RAD-5253BV
RAD-5253B
RAD-6273BV
RAD-6273B
RAD-6303BV
RAD-6303B
RAD-7333BV
RAD-7333B
RAD-7363BV
RAD-7363B
RAD-8453BV
RAD-8453B
120
120
0.4
.65
0.8
0.8
1.1
1.1
1.3
1.3
1.8
1.8
2.15
2.15
2.5
2.5
2.7
2.7
3.0
3.0
3.35
3.35
3.6
3.6
4.5
4.5
14-1/8
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
208 or 275
240 or 480
208 or 275
240 or 480
208 or 275
240 or 480
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
97-1/2
© 2010 Chromalox, Inc.
WIRING
9. SINGLE END WIRING may be made through one of the
wiring entries by bringing a lead through it from the opposite
end of the heating element using the wire-way provided behind
integral reflector in the housing extrusion. Wire used in mak-
ing such connections must be able to operate in high ambient
and have a sufficiently high voltage rating for the specific
application. The maximum wire diameter is limited by the
wire-way and must not exceed .224” over the insulation.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be installed by a qualified person in accor-
dance with the National Electrical Code, NFPA 70.
10. SERIES CONNECTION of Radiant Heaters of equal volt
and watt rating is permitted in all line voltages up to 600 volts.
In making such series connections it is necessary to observe the
“right” (series-parallel) connection rather than the “wrong”
(parallel-series) connection both shown in Figure 6. If heaters
are connected according to the “wrong” illustration, failure of
any one heater will cause progressive failure of other heaters
still operating.
ELECTRIC SHOCK HAZARD. Any installation involv-
ing electric heaters must be performed by a quali-
fied person and must be effectively grounded in
accordance with the National Electrical Code to
eliminate shock hazard.
1. Electric connection to the Radiant Heater is made through two
openings tapped for 1/2” connector. Openings are in the top of
the extruded heater housing, one near each end.
Wrong
Right
2. Access to Radiant Heater terminals is obtained by removing
Radiant
Heaters
the two screws in each of the terminal box covers.
3. Wiring should run in flexible or rigid metal conduit and must
be installed in accordance with the requirements of the
National Electrical Code and such other local requirements by
a qualified person.
L1
L2
L1
L2
Figure 6
4. Wires supplying power to heating element terminals shall have
insulation rated for 150˚C Minimum.
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 Figure 7.
High temperatures will oxidize copper. Use only
nickel-plated copper wire for supplying power to
heater. Do not use aluminum conductors.
5. A sufficient length of this wire (not less than 12”) should be
used to extend from each heater terminal into a connection box
location where the temperature does not exceed 300˚F.
3 Conductors
in 1 Conduit
Radiant
Heaters
A
B
C
D
E
F
6. Leave generous loop in wire when connecting to allow for
expansion of heating element.
L1
L2
L3
3 Conductors
in 1 Conduit
Figure 7
Three phase Delta connections to minimize inductive effect in con-
duits are made per this diagram. The rule: run all 3 three-phase con-
ductors in the same conduit as far as possible. For single-phase, run
only two conductors and follow the same rule.
Figure 5
7. Assemble terminal, screw and wire as shown in Figure 5.
8. Hold terminal with pliers and tighten the terminal screw
securely with a screwdriver.
Note: Where circuit wiring is installed in locations of high
ambient temperature, conductors should be insulated in accor-
dance with requirements for temperature and voltage.
3
OPERATION
B. Maximum Ambient Temperatures –
Chromalox Radiant Heaters are not recommended for applica-
tions in ambient temperature exceeding 450˚F. Higher ambient
temperatures mean shorter heater life.
FIRE/EXPLOSION 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.
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 radia-
tion and by convection to the surrounding ambient. Although it
is a general principle of Radiant Heater application that work
temperature conventionally exceeds ambient temperature, in
cases where extremely high work temperatures are desired, it is
necessary to enclose the heaters in order to increase the ambi-
ent. If evaporation of a liquid is desired as a result of increas-
ing 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.
Before energizing this heater:
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, and that they
will not chafe at the heater wire entrance due to expansion and
contraction of the heating element.
3. Be sure that all terminal covers have been properly replaced,
and that secondary insulation bushings have not been omitted.
A. Controlling Radiant Intensity — Standard Radiant Heaters
are built to operate at approximately 40 watts per sq. inch on
the element sheath. When it is desired to reduce radiant inten-
sity, one or more of the following methods may be used.
i. 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 magnetic contactors. See Chromalox Radiant Heater
Manual for further information regarding Input Controllers
and Contactors.
ii. SOLID STATE POWER CONTROLLERS. For best
non-contact control of radiant heat, a Chromalox SCR
Power Controller with manual potentiometer setting is rec-
ommended. Truly proportional output of from 0-100% can
be easily dialed-in to suit the particular product or process
requirements. The panels are pre-engineered, prepackaged
assemblies in an enclosure with circuit disconnect provided
and ready for installation.
MAINTENANCE
B. To Install Element —
Observe instructions for removing element and proceed in
reverse fashion. Be sure to replace secondary insulating bushings.
C. Care of Reflectors —
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be installed by a qualified person in accor-
dance with the National Electrical Code, NFPA 70.
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.
A. To remove Heating Element –
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 element out of heater.
4
RENEWAL PARTS IDENTIFICATION
1
2
7
6
Element
Model
Reflector
Sheet
Insulation
Bushing
Element
Support Clip
Volts
kW
Model
RAD-2063BX35
RAD-2063B
RAD-2063B
120
120
240
120
120
240
120
208
240
275
120
240
240
240
120
208
240
275
208
240
275
480
240
240
240
208
240
275
480
208
240
275
480
208
240
275
480
208
240
275
480
208
240
275
480
208
240
275
480
208
240
275
480
208
240
275
480
400
600
600
650
RTU-2063AX35
234-013411-031
234-013411-011
234-013411-011
234-013411-023
—————
—————
—————
—————
—————
—————
—————
—————
RTU-2063A-120V
RTU-2063A-240V
RTU-2063AX29
RAD-2063BX29
RTU-2073A-120V
RTU-2073A-240V
RTU-2083A-120V
RTU-2083AV-208V
RTU-2083A-240V
RTU-2083AV-275V
RTU-3083A-120V
RTU-3083A-240V
RTU-3093A-240V
RTU-3103A-240V
RTU-3113A-120V
RTU-3113AV-208V
RTU-3113A-240V
RTU-3113AV-275V
RTU-3133AV-208V
RTU-3133A-240V
RTU-3133AV-275V
RTU-3133A-480V
RTU-4153A-240V
RTU-4163A-240V
RTU-4173A-240V
RTU-4183AV-208V
RTU-4183A-240V
RTU-4183AV-275V
RTU-4183A-480V
RTU-5213AV-208V
RTU-5213A-240V
RTU-5213AV-275V
RTU-5213A-480V
RTU-5253AV-208V
RTU-5253A-240V
RTU-5253AV-275V
RTU-5253A-480V
RTU-6273AV-208V
RTU-6273A-240V
RTU-6273AV-275V
RTU-6273A-480V
RTU-6303AV-208V
RTU-6303A-240V
RTU-6303AV-275V
RTU-6303A-480V
RTU-7333AV-208V
RTU-7333A-240V
RTU-7333AV-275V
RTU-7333A-480V
RTU-7363AV-208V
RTU-7363A-240V
RTU-7363AV-275V
RTU-7363A-480V
RTU-8453AV-208V
RTU-8453A-240V
RTU-8453AV-275V
RTU-8453A-480V
RAD-2073B
RAD-2083B
RAD-3083B
700
800
800
234-013411-011
234-013411-011
234-013411-012
—————
—————
—————
—————
—————
—————
RAD-3093B
RAD-3103B
900
1000
234-013411-012
234-013411-012
—————
—————
—————
—————
RAD-3113B
1100
1300
234-013411-012
—————
—————
RAD-3133B
234-013411-013
—————
—————
RAD-4153B
RAD-4163B
RAD-4173B
1500
1600
1700
234-013411-014
234-013411-014
234-013411-014
032-013454-001 (2)
032-013454-001 (2)
032-013454-001 (2)
059-013424-001
059-013424-001
059-013424-001
RAD-4183B
RAD-5213B
RAD-5253B
RAD-6273B
RAD-6303B
RAD-7333B
RAD-7363B
RAD-8453B
1800
2150
2500
2700
3000
3350
3600
4500
234-013411-014
234-013411-015
234-013411-016
234-013411-017
234-013411-018
032-013454-001 (2)
032-013454-001 (4)
032-013454-001 (6)
032-013454-001 (6)
032-013454-001 (8)
032-013454-001 (8)
032-013454-001 (10)
032-013454-001 (10)
059-013424-001
059-013424-001 (2)
059-013424-001 (3)
059-013424-001 (3)
059-013424-001 (4)
059-013424-001 (4)
059-013424-001 (5)
059-013424-001 (5)
234-013411-006*
and
234-013411-015*
234-013411-004*
and
234-013411-012*
234-013411-049 (2)
* For ease of installation, these reflectors shipped in two pieces (one each of part numbers listed).
PARTS COMMON TO ALL HEATERS
Saddle Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238-026539-001 (2)
3
4
5
Terminal Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306-014405-001 (2)
Terminal Cover Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .056-014401-002 (4)
End Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220-014462-001 †
220-014462-002
15
† 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.
8
Terminal Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248-046044-002
5
RENEWAL PARTS IDENTIFICATION
6
MISCELLANEOUS HARDWARE
Screws —
MISCELLANEOUS PARTS
9
Terminal Blocks 303-016367-001 (2)
#8 x 1” Lg. 248-075519-095 (6)
#8 x 3/8” Lg. 248-075519-080 (4)
#8-32 x 3/8” Lg. 248-075512-053 (4)
12
13
14
10 Speed Nuts — 272-048153-005 (4)
11
Terminal Block — 303-014326-001 (2)
TERMINAL BLOCK SET
HEATER MOUNTING CLAMP ASSEMBLY
168-016585-001 consists of the following:
Terminal Block 303-016367-001 (2)
See Figures 1, 2, 3 and 4, page 1.
9
For mounting heater with catalog numbers up to Cat. No. RAD 7000
use mounting clamp assembly Part No. 168-013071-001. For mount-
ing heaters above Cat. No. RAD 7000 use mounting clamp assembly
Part No. 168-013071-002.
10 Speed Nuts 272-048153-005 (4)
11 Terminal Block 303-014326-001 (2)
Screws — #8 x 1” Lg. 248-075519-095 (6)
12
NOTE: Part numbers suffixed by a number in ( ) indicates the quantity of the same part number used.
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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