®
Chromalox
SERVICE REFERENCE
Installation Operation
DIVISION
SALES
4
SECTION RBC
(Supersedes PG416-3)
and
REFERENCE
PG416-4
RENEWAL PARTS IDENTIFICATION
161-025617-001
DATE
MARCH,1999
Type RBC-3 Radiant Heater
10-1/2”
5-1/2”
Amperage
Net
Weight
(Lbs.)
No.
Elements
Model
Volts
kW
BTU
4,094
8,188
12,272
1 Phase
3 Phase
RBC-31280
RBC-31220
RBC-31240
RBC-32480
RBC-32420
RBC-32440
RBC-33680
RBC-33620
RBC-33640
208
240
480
208
240
480
208
240
480
5.8
5.0
2.5
——
——
——
——
——
——
10.0
8.7
1,200
2,400
3,600
1
2
3
8
11.5
10.0
5.0
17.3
15.0
7.5
8-3/4
9-3/4
4.3
© 2010 Chromalox, Inc.
WIRING DIAGRAMS
For supply connection use 14GA. min. wire suitable for at least 75˚C.
For supply connection use 14GA. min. wire suitable for at least 90˚C.
L1
L1
L2
Ground (Green)
L2
Ground (Green)
G
G
Figure 1
Figure 2
For supply connections use wire suitable for at least 90˚C (see below)
For supply connection use 14GA. min. wire suitable for at least 90˚C.
L1
L1
208V
240V
480V
10GA. min.
12GA. min.
14GA. min.
L2
L2
L3
Ground (Green)
Ground (Green)
G
G
Figure 3
Figure 4
OPERATION
4. CONTROLLING RADIANT INTENSITY —
WARNING: This heater is not intended for use in
hazardous atmospheres where flammable vapors,
gases, liquids or other combustible atmospheres
are present as defined in the National Electrical
Code. Failure to comply can result in explosion or
fire.
When it is desirable to reduce radiant intensity, Input
Controllers may be used. These motor-driven cycling devices
can be used to vary heater output capacity from 4% to 100%.
Cycling devices are usually connected in holding coil circuit of
magnetic contactors. For further information regarding Input
Controllers and Contactors, see Chromalox catalog and/or con-
tact your local Chromalox representative.
1. Minimum spacing from front of heater case to combustible
material is: 4 ft. — RBC3-12 (1200W)
5. WARNING: Because of the possibility of someone
unknowingly exposing the heater to combustible
hazards, the heater should not be left in operation
while unattended.
7 ft. — RBC3-24 or RBC3-36 (2400W or 3600W)
2. Avoid temperatures in excess of 194˚F on nearby combustible
surfaces.
3. Do not operate heaters at voltages in excess of that stamped
on heater nameplate since excess voltage will shorten heater life.
MAINTENANCE
3. Loosen and disengage hex nut and washer from threaded fitting.
4. Pull element out of reflector housing and terminal box.
5. Slide new gasket (see Renewal Parts) onto threaded fitting of
replacement element. Note: Filler side of gasket faces away
from flange of threaded fitting. Insert new element through ter-
minal box opening, and slip on washer and hex nut before ele-
ment enters reflector housing. Tighten hex nut until element
mounting is secure.
WARNING: Hazard of Severe Shock. Disconnect all
power to heater before servicing these heaters.
A. Element Replacement (See Figure E)
1. Remove Terminal housing cover and gasket.
2. Disconnect element leads from external leads.
Washer
Hex Nut
6. Reconnect power supply leads to element terminals. Install
new terminal cover gasket (see Renewal Parts). Install terminal
box cover. Reconnect power to heater circuit.
Compression
Terminal Box
Gasket
Grounding
Terminal
B. Care of Reflector
The reflectors should be kept clean to obtain the maximum
radiant output. The entire assembly should be washed or brushed
off periodically to remove dust and dirt. However, if the inside of
the reflector gets badly soiled, a mild soap and water solution may
be used. Wipe reflecting surface dry to prevent permanent water
marks. For extreme cases of soil which do not yield to mild soap
cleaning, use plastic or fine steel wool type scouring pads com-
monly used on cooking utensils. Avoid use of ammonia or alka-
line cleaners which will etch the aluminum surfaces.
Threaded
Fitting
Note: Avoid hosing down the heater assembly because con-
Figure E
duit may not be waterproof.
RENEWAL PARTS IDENTIFICATION
Common Parts
Heating Element Gasket
132-047675-004
Heating Element Part No.
Volts
kW
322-874016-003
322-874016-001
322-874016-002
208
240
480
1.2
1.2
1.2
Terminal Cover Gasket
132-012603-004
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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