®
Chromalox
SERVICE REFERENCE
Installation Instructions
DIVISION
SALES
4
SECTION CBH
(Supersedes PB402-3)
REFERENCE
PB402-4
161-049132-001
DATE
MARCH, 1999
Type CBH Electric Stud Heater
Specifications — Table A
A
B
C
D
Cold
End
E
Cold
End
Max.
Stud Hole
Diameter*
Insertion
Length
Heater
Length
Heater
Diameter
Model
Volts
Watts
CBH-1815
CBH-2415
CBH-3025
CBH-3025
CBH-3625
CBH-3625
CBH-1816
CBH-2416
CBH-3026
CBH-3626
CBH-1827
CBH-2427
CBH-3647
CBH-3647
CBH-4867
CBH-4867
CBH-6177
CBH-2438
CBH-3048
CBH-4258
CBH-4258
CBH-4868
CBH-4269
CBH-4269
CBH-6189
CBH-6619
CBH-6011
120
120
120
240
120
240
120
120
120
120
120
120
120
240
240
480
240
240
120
240
480
240
240
480
240
480
480
1150
1500
2250
2250
2600
2600
1200
1700
2300
2800
1700
2500
4200
4200
6000
6000
7500
2700
3600
5300
5300
6500
6000
6000
8000
9000
11500
18”
24”
30”
30”
36”
36”
18”
24”
30”
36”
18”
24”
36”
36”
48”
48”
60”
24”
30”
42”
42”
48”
42”
42”
54”
66”
60”
12”
18”
24”
24”
30”
30”
12”
18”
24”
30”
12”
18”
30”
30”
42”
42”
54”
18”
24”
36”
36”
42”
36”
36”
48”
60”
54”
0.553”
0.553”
0.553”
0.553”
0.553”
0.553”
0.660”
0.660”
0.660”
0.660”
0.730”
0.730”
0.730”
0.730”
0.730”
0.730”
0.730”
0.855”
0.855”
0.855”
0.855”
0.855”
0.980”
0.980”
0.980”
0.980”
1.106”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/8”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-7/8”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
6-3/4”
0.616
0.616
0.616
0.616
0.616
0.616
0.735
0.735
0.735
0.735
0.860
0.860
0.860
0.860
0.860
0.860
0.860
0.985
0.985
0.985
0.985
0.985
1.110
1.110
1.110
1.110
1.236
4” Octagon Box,
3/4” Knockout
2”
E
B
1/8”
A
1/4”
D
C
CBH Heater
Inserted into Standard Drill Hole
* Stud Hole Diameter should be held closer to the heater diameter, if possible. Consult factory for use of heaters in stud hole diameters
not listed in Specifications.
GENERAL
Since excess temperatures may permanently damage the heaters,
temperature regulating and limiting controls are recommended.
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.
WARNING: Users should install adequate back-up
controls and safety devices with their electric heat-
ing equipment. Where the consequences of failure
may be severe, back-up controls are essential.
Although the safety of the installation is the respon-
sibility of the user, Chromalox will be glad to make
equipment recommendations.
The Chromalox electric stud heaters are ruggedly constructed
and if properly installed, operated and maintained, will provide
long life and dependable, trouble-free service.
INSTALLATION
WARNING: Hazard of Electric Shock. Disconnect
A stud hole five thousandths larger than specified will
cause premature burnout or permanent damage to
heater.
all power before installing heater.
1. Select the heater with the proper diameter and insertion length
closest to the size hole in the stud or bolt being heated. The
heated section must be inserted in the stud when energized.
Insert the entire heated length of heater into stud hole.
2. Graphite and other lubricants to help insert the cartridge
heater into the hole are not recommended. They are electrical-
ly conductive and can contaminate the heater and shorten
heater life. Chromalox HTRC (Heat Transfer and Release
Coating) is recommended.
WARNING: Stud hole must not be larger for heater
being used than that shown in Table A Specifications.
© 2010 Chromalox, Inc.
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