®
Chromalox
SERVICE REFERENCE
Installation, Operation
and
Maintenance Instructions
DIVISION
SALES
4
SECTION PTHT
(Supersedes PD439-1)
161-562284-001
REFERENCE
PD439-2
DATE
JULY, 1998
Titanium Over-the-Side Immersion Heater
Type PTHT
Flexible PVC
Specifications
Conduit
Dimensions (In.)
Volts
(Single
Phase)
Approx.
Wt.
(Lbs.)
Model
Number
kW
W/In2
4-3/4”
Leadwires
w/ Ground
A
B
Terminal
Box
PTHT-101
PTHT-102
120
240
1
2
3
4
6
8
19
19
21
21
22
22
13
21
26
31
42
53
6
6
7
Mtg. Bracket
PTHT-202
PTHT-204
240
480
90˚ Bend
12
17
22
33
44
PTHT-302
PTHT-304
240
480
8
A
PTHT-402
PTHT-404
240
480
9
B
PTHT-602
PTHT-604
240
480
12
14
PTHT-802
PTHT-804
240
480
9-3/16”
GENERAL
DANGER: This heater is not intended for use in haz-
ardous 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.
against failure by sheath corrosion if such failure
is the result of operating beyond our control.
1. Heater construction characteristics.
A. High quality resistance wire held in place by compacted
magnesium oxide in titanium sheath.
Chromalox type PTHT over-the-side immersion heaters are
especially suited for use in plating tanks, rinse tanks and other
aqueous solutions.
B. Medium watt densities.
C. Vapor tight 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.
WARNING: 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 solution, and controls
which he maintains on the process. Chromalox
cannot warrant any electric immersion heater
WARNING: Users should install adequate controls and safe-
ty devices with their electric heating equipment. Where the
consequences of failure may be severe, back-up controls are
essential. Although the safety of the installation is the
responsibility of the user, Chromalox will be glad to make
equipment recommendations.
INSTALLATION
4. WARNING: Heated section (See Figure 1, “B” Dimension)
must be totally immersed at all times. If the heater is not properly
submerged, it will overheat and damage the heating element and
create a possible fire hazard due to excessive sheath temperatures.
5. Heater must not be operated in sludge.
WARNING: Hazard of Electrical Shock. Disconnect all
power before installing heater.
1. Before installing the type PTHT heater, inspect it thoroughly for
possible damage which may have occured during shipment. Also
check to insure that the line voltage is the same as that stamped
on the heater nameplate.
6. DANGER: Hazard of Fire. Since these heaters are capable
of developing high temperatures, extreme care should be taken to:
A. Avoid installing heaters in an atmosphere containing com-
bustible gases and vapors.
2. Where work will pass over or near equipment, additional pro-
tection such as a metal guard may be needed.
3. To resist buoyancy and to keep the heater in close profile with
tank wall, a metal bracket with two mounting holes has been
provided.
B. Avoid contact between heater and combustible materials.
C. Keep combustible materials for enough away to be free of
the effects of high temperatures.
© 2010 Chromalox, Inc.
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