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DIVISION
4
SECTION
PTH
SALES
REFERENCE
DATE
SERVICE REFERENCE
Installation
and
Operating Instructions
PD422-4
161-056676-001
NOVEMBER, 2004
(Supersedes PD422-3)
Chromalox
®
GENERAL
© 2010 Chromalox, Inc.
Type PTH
Over-the-Side Immersion Heaters
FIRE/EXPLOSION HAZARD. This heater is not intend-
ed for use in hazardous atmospheres where flamma-
ble vapors, gases, liquids or other combustible atmos-
pheres are present as defined in the National
Electrical Code. Failure to comply can result in per-
sonal injury or property damage.
Chromalox type PTH over-the-side immersion heaters are
especially suited for use in plating tanks, rinse tanks and other
aqueous solutions.
IMPORTANT: It is the responsibility of the purchaser
of the heater to make the ultimate choice of sheath
material based upon his knowledge of the chemical
composition of the corrosive solution, character of the
materials entering the solution, and controls which he
maintains on the process.
Sheath corrosion can result in a ground fault which,
depending upon the solution being heated, can cause
an explosion or fire.
Heater Construction Characteristics.
A. High quality resistance wire held in place by compacted mag-
nesium oxide in type 316 passivated stainless steel sheath.
B. Medium watt densities.
C. Vapor resistant junction box with 3’ PVC flexible conduit with
ground wire.
D. Spacer bar prevents elements from touching tank wall.
E. Flat profile consumes little tank work area.
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.
Model Volts
Dimensions (In.)
Approx.
Number (1 Ph) kW W/In
2
Wt.
AB
(Lbs.)
PTH-101 120 1 21 14 8 4
PTH-102 240 1 21 14 8 4
PTH-202 240 2 31 21 11 4
PTH-204 480 2 31 21 11 4
PTH-302 240 3 32 26 16 5
PTH-304 480 3 32 26 16 5
PTH-402 240 4 34 20 20 5
PTH-404 480 4 34 30 20 5
PTH-602 240 6 34 40 30 6
PTH-604 480 6 34 40 30 6
PTH-902 240 9 34 54 44 8
PTH-904 480 9 34 54 44 8
Specifications
1-3/4”
Leadwires w/ Ground
3’ PVC Flexible Conduit
4, 6 and 9 kW
Heaters Equipped
with Two (2)
1-1/8” Spacers
1, 2 and 3 kW
Heaters Equipped
with One (1)
1-1/8” Spacer
Mounting Plate
5 x 1-1/2” Wide with
(2) Holes
4” Center to Center
B
Heated
A
Figure 1
Figure 2