®
Chromalox
SERVICE REFERENCE
Installation, Operation
DIVISION
SALES
4
SECTION LTFX
(Supersedes PN403)
and
REFERENCE
PN403-1
161-049178-101
RENEWAL PARTS IDENTIFICATION
DATE
SEPTEMBER, 2009
Type LTFX
Unitary Electric Immersion Heaters
Specifications — E4 Moisture Resistant Housing
Matching Control Panel
PCN Model
Immersion ANSI Flange
Number
of Tubes
Tube
Diameter
Watt Density
(Outside)
Heater Model
kW
Volts Phase Circuits Length (In.)
Size
LTFX-125-004E4
LTFX-128-008E4
LTFX-1212-012E4
LTFX-2212-024E4
LTFX-3212-036E4
LTFX-2325-060E4
LTFX-3325-090E4
LTFX-4325-120E4 120
LTFX-6325-180E4 180
LTFX-8325-240E4 240
4
8
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
1
1
1
1
1
1
3
2
3
4
60
96
4" - 150#
4" - 150#
4" - 150#
6" - 150#
6" - 150#
8" - 150#
10" - 150#
10" - 150#
12" - 150#
14" - 150#
1
1
1
2
3
2
3
4
6
8
2"
2"
2"
2"
2"
3"
3"
3"
3"
3"
10
12
12
12
12
9
9
9
9
9
328858 4468-30211
328858 4468-30211
328858 4468-30211
328858 4468-30211
328890 4468-30211
329920 4468-60211
12
24
36
60
90
144
144
144
300
300
300
300
300
N/A
N/A
N/A
N/A
4468-90211
4432-348-51100
4432-348-51100
4432-348-51100
Specifications — E2 Explosion/Moisture Resistant Housing
Matching Control Panel
PCN Model
Immersion ANSI Flange
Number
of Tubes
Tube
Diameter
Watt Density
(Outside)
Heater Model
kW Volts Phase Circuits Length (In.)
Size
LTFX-125-004E2
LTFX-128-008E2
LTFX-1212-012E2
LTFX-3210-024E2
LTFX-3215-036E2
LTFX-3225-060E2
LTFX-4225-090E2
LTFX-8215-120E2 120
LTFX-9220-180E2 180
LTFX-12225-240E2 240
4
8
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
1
1
1
1
1
1
2
2
3
4
60
96
4" - 150#
4" - 150#
4" - 150#
8" - 150#
8" - 150#
8" - 150#
10" - 150#
12" - 150#
14" - 150#
14" - 150#
1
1
1
3
3
3
4
8
9
2"
2"
2"
2"
2"
2"
2"
2"
2"
2"
10
12
12
9
9
9
10
12
11
9
Note: Explosion Resistant
Control Panels are available.
However, locating the
control panel outside the
hazardous location may offer
significant cost savings.
Please refer to section 'H' of
the catalog for available
Panel options.
12
24
36
60
90
144
120
180
300
300
180
240
300
12
Note: For horizontal mount only.
© 2010 Chromalox, Inc.
WIRING (cont’d.)
Wiring Entrance Locations - Moisure Resistant Housing Only
(E4 Option)
The Moisture Resistant (E4) Housing offers several conve-
including temperatures on the outside of the vessel, piping,
flanges, screw plugs, enclosures and other heat conducting parts be
limited. The flammable liquids, vapors or gases present determine
the maximum surface temperature permitted in any hazardous
location. The end user or purchaser of the electric heating equip-
ment is responsible for determining the proper classification of an
area and for providing Chromalox with hazardous area specifica-
tions and requirements for proper equipment design. (NEC and
IEC provide guidelines for evaluating and classifying hazardous
locations.)
nient options for conduit wiring & location. The housing is
equipped with two removable service entrance plates for installa-
tion of wiring. Any or all of the six sides can be used for wiring
locations. Refer to exploded view drawing. The housing can also
be rotated (by removal from flange) to allow for more position
possibilities. To install service entrance holes, simply remove the
side Allen screws and use the centering depression to drill the
appropriate size hole. Reinstall the gasket(s), if applicable, and
service entrance plates by tightening the Allen head screws to 4-5
in-lbs. The 'Octobox' style of housing can be removed for ease of
access to element bussing or to better locate the power conduit(s)
entry point. To accomplish, simply remove the Allen-head screws
on the outside of the housing. When reinstalling, be sure to prop-
erly align gasket, if applicable, and tighten to 40-50 in-lbs.
Tip for Reinstalling Gaskets:
An approved liquid level control or overtemperature
control must be installed to deenergize the heater if
the liquid level drops below the top of the heater.
Table A – E4 Wiring Information
Heater
kW
Volts
Phase
Total Amps
Circuits
Place Allen Head screws through metal covers and gentle
push gasket hole over the threaded screw. This will allow the gas-
ket to stay in place while tightening the cover.
LTFX-125-004E4
LTFX-128-008E4
LTFX-1212-012E4
LTFX-2212-024E4
LTFX-3212-036E4
LTFX-2325-060E4
LTFX-3325-090E4
LTFX-4325-120E4
LTFX-6325-180E4
LTFX-8325-240E4
4
8
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
4.8
9.6
1
1
1
1
1
1
3
2
3
4
12
14.5
24
28.9
36
43.4
60
72.3
90
108.4
144.5
216.8
289.0
120
180
240
Table B – E2 Wiring Information
Heater
kW
Volts
Phase
Total Amps
Circuits
LTFX-125-004E2
LTFX-128-008E2
LTFX-1212-012E2
LTFX-3210-024E2
LTFX-3215-036E2
LTFX-3225-060E2
LTFX-4225-090E2
LTFX-8215-120E2
LTFX-9220-180E2
4
8
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
4.8
9.6
1
1
1
1
1
1
2
2
3
4
12
24
36
60
90
120
180
14.5
Wiring Entrance Locations - Explosion Resistant Housing
Only (E2 Option)
28.9
The Explosion Resistant (E2) Housing features dedicated
conduit connection sizes and locations for NPT installation of con-
duit. Wiring installation must be in accordance with Hazardous
Area requirements. The use of EYS seals or rigid conduit may be
required. Please consult with the local inspection authority.
Maximum Temperatures
43.4
72.3
108.4
144.5
216.8
289.0
Safe operation in a hazardous location requires the maximum
operating temperatures of all exposed surfaces of the heater
LTFX-12225-240E2 240
OPERATION
ards, permanent heater damage, or cause heater failure and there-
fore should be avoided.
For initial operation and tuning the control scheme:
1. Turn the master circuit breaker off and open the control box door.
2. Set the indicating temperature control at the desired temperature
and the over-temperature cutout at 50°F above this temperature.
3. Interlock the liquid level control with the cutout device.
4. Close the control box door and turn the circuit breaker on. To ener-
gize the heater circuits, turn the on-off selector switch to the “on”
position.
FIRE HAZARD. To avoid possible damage to the
heater, do not energize until the tank is filled with
fluid. Recommended fluid level is 2” above the heater
tube or pipe.
1. Do not operate heaters at voltages in excess of that stamped on the
heater, since excess voltage will shorten heater life.
2. Heaters should not be operated in environments with factors that
can destroy the electrical insulating characteristics of the ceramic
insulators. Foreign contaminants can create leakage (shock) haz-
MAINTENANCE
and the ceramic insulators do not contact oil or any other liquid foreign
matter. NOTE: Chromalox cannot be responsible for failures or dam-
age caused by contamination on the ceramic insulators.
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.
4. Installation is the reverse of the above.
Element Replacement - Hazardous Locations, Explosion Resistant
Housing Only (E2 option)
1. To remove the OCE heating assembly, first turn the circuit breaker to
the off position.
2. Next remove the housing lid, element wiring, and 5/16” bolting around
the element flamepath module. If needed, (2) 1/4-20x2” bolts may be
used to break loose the module from the flange. Turn bolts evenly until
module is free. The flamepath module will be re-used, so disconnected
the heating element from the module pins. Now pull the element
assembly out of the heating tube. NOTE: OCE elements should only be
bent in a vertical plane with ground strap on the bottom.
3. When removing the heating elements, make certain that the terminals
and the ceramic insulators do not contact oil or any other liquid foreign
matter. Note: Chromalox cannot be responsible for failures or damage
caused by contamination on the ceramic insulators.
4. Inspect the element assembly flange and mating surface for any debris,
oils, or contamination. NOTE: Surfaces must be in suitable condition
to ensure proper hazardous rating.
5. Connect the new element to the flamepath module and slide into tube.
Flamepath module bolting must be tightened to XXX ft. lbs. of torque.
6. Reattach element wiring. When reinstalling housing lid, be sure to prop-
erly align gasket, and tighten housing bolts to 40-50 in-lbs.
1. Make certain both the terminals and the ceramic insulators are free
from contact with oil, liquid, or other foreign matter.
NOTE: Chromalox cannot be responsible for failures or damage
caused by contamination on the ceramic insulators. Make certain the
heaters are not exposed to contaminants.
2. Check electrical connections at heater terminals and tighten if neces-
sary. This will help avoid hot terminals which may destroy wire insu-
lation or heater terminals
3. Check overheat operation to assure heater protection.
Element Replacement - Moisture Resistant Housing Only
(E4 Option)
1. To remove the OCE heating elements, first turn the circuit breaker to
the off position.
2. Next remove the housing lid, element wiring and the element mount-
ing screw. Now pull the element straight out of the heating tube.
NOTE: OCE elements should only be bent in a vertical plane with
ground strap on the bottom.
3. When removing the heating elements, make certain that the terminals
TYPE LTFX RENEWAL PARTS IDENTIFICATION
Table C – E4 Housing Renewal Parts Identification
Heater
Model
Immersion
Volts Phase Length (In.)
ANSI
Number
of Tubes
Tube
OCE
Replacement
kW
4
8
Flange Size
Diameter
Element No.
OCE Model No.
LTFX-125-004E4
LTFX-128-008E4
LTFX-1212-012E4
LTFX-2212-024E4
LTFX-3212-036E4
LTFX-2325-060E4
LTFX-3325-090E4
LTFX-4325-120E4
LTFX-6325-180E4
LTFX-8325-240E4
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
60
96
4" - 150#
4" - 150#
4" - 150#
6" - 150#
6" - 150#
8" - 150#
10" - 150#
10" - 150#
12" - 150#
14" - 150#
1
1
1
2
3
2
3
4
6
8
2"
2"
2"
2"
2"
3"
3"
3"
3"
3"
#1
#2
#3
#3
#3
#4
#4
#4
#4
#4
OCE-05040-2-483
OCE-06080-2-483
OCE-12120-2-483
OCE-12120-2-483
OCE-12120-2-483
OCE-25300-3-483
OCE-25300-3-483
OCE-25300-3-483
OCE-25300-3-483
OCE-25300-3-483
12
24
36
60
90
120
180
240
144
144
144
300
300
300
300
300
Table D – E2 Housing Renewal Parts Identification
Heater
Immersion
ANSI
Number
of Tubes
Tube
OCE
Replacement
Model
kW
4
8
Volts Phase Length (In.)
Flange Size
Diameter
Element No.
OCE Model No.
LTFX-125-004E2
LTFX-128-008E2
LTFX-1212-012E2
LTFX-3210-024E2
LTFX-3215-036E2
LTFX-3225-060E2
LTFX-4225-090E2
LTFX-8215-120E2
LTFX-9220-180E2
LTFX-12225-240E2
480
480
480
480
480
480
480
480
480
480
3
3
3
3
3
3
3
3
3
3
60
96
4" - 150#
4" - 150#
4" - 150#
8" - 150#
8" - 150#
8" - 150#
10" - 150#
12" - 150#
14" - 150#
14" - 150#
1
1
1
3
3
3
4
8
9
2"
2"
2"
2"
2"
2"
2"
2"
2"
2"
#1
#2
#3
#2
#3
#5
#6
#7
#5
#5
OCE-05040-2-483
OCE-06080-2-483
OCE-06080-2-483
OCE-06080-2-483
OCE-06080-2-483
OCE-25200-2-4803
OCE-25225-2-4803
OCE-15150-2-4803
OCE-25200-2-4803
OCE-25200-2-4803
12
24
36
60
90
120
180
240
144
120
180
300
300
180
240
300
12
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
TA - S7 - EF.
Litho in U.S.A.
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
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