Chromalox PN403-1 User Manual
Type LTFX
Unitary Electric Immersion Heaters
© 2010 Chromalox, Inc.
Chromalox
®
DIVISION 4 SECTION
LTFX
SALES
REFERENCE
DATE
SERVICE REFERENCE
Installation, Operation
and
RENEWAL PARTS IDENTIFICATION
PN403-1
161-049178-101
SEPTEMBER, 2009
(Supersedes PN403)
Immersion ANSI Flange Number Tube Watt Density
Matching Control Panel
Heater Model kW Volts Phase Circuits Length (In.) Size of Tubes Diameter (Outside) PCN Model
LTFX-125-004E4 4 480 3 1 60 4" - 150# 1 2" 10 328858 4468-30211
LTFX-128-008E4 8 480 3 1 96 4" - 150# 1 2" 12 328858 4468-30211
LTFX-1212-012E4 12 480 3 1 144 4" - 150# 1 2" 12 328858 4468-30211
LTFX-2212-024E4 24 480 3 1 144 6" - 150# 2 2" 12 328858 4468-30211
LTFX-3212-036E4 36 480 3 1 144 6" - 150# 3 2" 12 328890 4468-30211
LTFX-2325-060E4 60 480 3 1 300 8" - 150# 2 3" 9 329920 4468-60211
LTFX-3325-090E4 90 480 3 3 300 10" - 150# 3 3" 9 N/A 4468-90211
LTFX-4325-120E4 120 480 3 2 300 10" - 150# 4 3" 9 N/A 4432-348-51100
LTFX-6325-180E4 180 480 3 3 300 12" - 150# 6 3" 9 N/A 4432-348-51100
LTFX-8325-240E4 240 480 3 4 300 14" - 150# 8 3" 9 N/A 4432-348-51100
Specifications — E4 Moisture Resistant Housing
Immersion ANSI Flange Number Tube Watt Density
Matching Control Panel
Heater Model kW Volts Phase Circuits Length (In.) Size of Tubes Diameter (Outside) PCN Model
LTFX-125-004E2 4 480 3 1 60 4" - 150# 1 2" 10
LTFX-128-008E2 8 480 3 1 96 4" - 150# 1 2" 12
LTFX-1212-012E2 12 480 3 1 144 4" - 150# 1 2" 12
LTFX-3210-024E2 24 480 3 1 120 8" - 150# 3 2" 9
LTFX-3215-036E2 36 480 3 1 180 8" - 150# 3 2" 9
LTFX-3225-060E2 60 480 3 1 300 8" - 150# 3 2" 9
LTFX-4225-090E2 90 480 3 2 300 10" - 150# 4 2" 10
LTFX-8215-120E2 120 480 3 2 180 12" - 150# 8 2" 12
LTFX-9220-180E2 180 480 3 3 240 14" - 150# 9 2" 11
LTFX-12225-240E2 240 480 3 4 300 14" - 150# 12 2" 9
Specifications — E2 Explosion/Moisture Resistant Housing
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.
Note: For horizontal mount only.
WARNING: 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 or serviced by a qualified person in accordance with the
National Electrical Code, NFPA 70.
ELECTRIC SHOCK HAZARD. Any installation involving electric heaters must be performed by a qualified person and must be effectively grounded in
accordance with the National Electrical Code to
eliminate shock hazard.
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 consequences of failure could result in personal injury or
property damage, back-up controls are essential.
1. Electrical wiring to heating elements must be sized and installed in
accordance with the National Electric Code and applicable local
codes by a qualified person as defined in the NEC.
2. Temperatures at the heater terminals will require the use of man-
ganese nickel or equivalent temperature lead wire. (Type TGS,
TGT, or TGGT are recommended.)
DANGER: Hazard of Explosion or Fire. The tank must
be purged of all flammable vapors prior to cutting or
welding.
High heating efficiency, low element temperatures, and longer
heater life are achieved when the unit is properly installed.
1. To avoid chipping or cracking, precaution should be taken while
unpacking, handling, and installing the ceramic insulators. Heaters
with damaged insulators should be returned to the factory for repair or
replacement. Contact your local sales office for return authorization.
2. The LTFX unit must not be mounted in the vertical position as the
resistance wire on the OCE element can sag, thus causing uneven heating or short circuit. Unit should be installed in a horizontal position
with the thermowell on top only.
3. IMPORTANT: Mount heater in the tank so the liquid
level will always be above the effective heated portion
of the heater. Provide expansion tank if necessary.
4. Select a location for this installation according to the following guidelines: (refer to Figure 1)
A. Heating elements are removable through the terminal enclosure
however adequate room must be provided for this purpose. The
removal length of the OCE heating element is 3 feet since the center section may be bent on a 12” radius. OCE elements should only
be bent in a vertical plane with ground strap on the bottom.
B. The neck on the tank’s mating flange should be of adequate length
to accommodate tank insulation and flange bolting.
5. Tube supports (internal to the tank) should be placed approximately
three feet from the ‘wet-side’ of the LTFX flange to ensure gasket sealing integrity. Additional tube supports can then be spaced on 10 foot
centers. Do not anchor the heater tubes to the supports, as the tubes
must be allowed to expand.
6. To ensure proper sealing, a material appropriate gasket needs to be
installed between the mating flanges. The mating flanges should then
be secured by tightening the bolting according to TEMA Standards.
7. A tank suction pipe should be mounted at least 2” above the level of the
heaters. A separate line can be provided to drain tank after heaters have
been de-energized
.
INSTALLATION
2
Allow for Tank
Insulation and Bolting
36” Min. Element
Removal Distance
Model LTFX
Tank
Fluid
Level
Open-Coil Elements
Figure 1
The Chromalox Unitary Electric Immersion Heater, Model
LTFX, is an engineered, pretested package designed to give years
of virtually maintenance free service and it is shipped ready for
installation into a storage tank. LTFX provides low watt-density
heating over a large heating surface with precise temperature control for such materials as asphalt, fuel oil, pitch and tar, liquid
sugar, lube oils, linseed oil, biodiesel, glycerin, ethanol and many
other heat sensitive compounds.
The open coil heating elements (OCE) are housed in either 2”
or 3” Schedule 40 carbon or stainless steel pipes, which are welded into the 150# ANSI flange. Once the Unitary Immersion Heater
is mated to your tank, the heating elements may be removed and
replaced without draining the tank.
Since excessive temperatures may permanently damage the
heater and cause premature failure, the use of temperature controls, limiting controls, and liquid level sensors are recommended.
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 consequences of failure could result in personal injury or
property damage, back-up controls are essential.
GENERAL
WIRING
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