Chromalox PN403-1 - Manual (Page 4)

4
When reinstalling, be sure to properly align gasket, if
applicable, and tighten to 40-50 in/lbs.
Tip for Reinstalling Gaskets:
Place allen head screws through metal covers and
gentle push gasket hole over the threaded screw. This
will allow the gasket to stay in place while tightening
the cover.
Table A – E4 Wiring Information
Heater kW Volts Phase
Total
Amps Circuits
LTFX-125-004E4 4 480 3 4.8 1
LTFX-128-008E4 8 480 3 9.6 1
LTFX-1212-012E4 12 480 3 14.5 1
LTFX-2212-024E4 24 480 3 28.9 1
LTFX-3212-036E4 36 480 3 43.4 1
LTFX-2325-060E4 60 480 3 72.3 1
LTFX-3325-090E4 90 480 3 108.4 3
LTFX-4325-120E4 120 480 3 144.5 2
LTFX-6325-180E4 180 480 3 216.8 3
LTFX-8325-240E4 240 480 3 289.0 4
Wiring Entrance Locations - Explosion
Resistant Housing Only (E2 Option)
The Explosion Resistant (E2) Housing features dedi-
cated conduit connection sizes and locations for either
NPT installation of conduit or Metric cable glands. In-
coming wiring must be suitable for a maximum termi-
nal enclosure temperature of 158˚F (70˚C). Wiring in-
stallation must be in accordance with Hazardous Area
requirements. The use of EYS seals or rigid conduit
may be required. Please consult with the local inspec-
tion authority.
Maximum Temperatures
Safe operation in a hazardous location requires the
maximum operating temperatures of all exposed sur-
faces of the heater including temperatures on the out-
side of the vessel, piping, flanges, screw plugs, enclo-
sures 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 equipment is responsible for determin-
ing the proper classification of an area and for provid-
ing Chromalox with hazardous area specifications and
requirements for proper equipment design. (NEC and
IEC provide guidelines for evaluating and classifying
hazardous locations.)
An approved liquid level control or overtemper-
ature control must be installed to deenergize
the heater if the liquid level drops below the
top of the heater.
Maximum fluid temperature per following table:
Temperature Class Maximum Fluid Temperature
T1 (450˚C) 440˚C
T2 (300˚C) 290˚C
T3 (200˚C) 195˚C
T4 (135˚C) 130˚C
T5 (100˚C) 95˚C
T6 (85˚C) 80˚C
The external surfaces of the heater must not exceed
the marked fluid temperature. An over-temperature
control should be used if there is a possibility of the
heater’s external surface temperature exceeding the
fluid temperature.
Table B – E2 Wiring Information
Heater kW Volts Phase
Total
Amps Circuits
LTFX-125-004E2 4 480 3 4.8 1
LTFX-128-008E2 8 480 3 9.6 1
LTFX-1212-012E2 12 480 3 14.5 1
LTFX-3210-024E2 24 480 3 28.9 1
LTFX-3215-036E2 36 480 3 43.4 1
LTFX-3225-060E2 60 480 3 72.3 1
LTFX-4225-090E2 90 480 3 108.4 2
LTFX-8215-120E2 120 480 3 144.5 2
LTFX-9220-180E2 180 480 3 216.8 3
LTFX-12225-240E2 240 480 3 289.0 4