Chromalox PD438-2 User Manual

Chromalox, Installation, operation, Maintenance instructions

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Chromalox

®

DIVISION

4

SECTION

PTHF

SALES

REFERENCE

DATE

SERVICE REFERENCE

Installation, Operation

and

Maintenance Instructions

PD438-2

161-620127-001

AUGUST, 1998

(Supersedes PD438-1)

GENERAL

© 2010 Chromalox, Inc.

Type PTHF Over-the-Side Immersion Heater

WARNING: 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.

Chromalox type PTHF over-the-side immersion heaters are

especially suited for heating corrosive solutions to 212˚F.

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 corro-
sive solution, character of the materials entering the solution,
and controls which he maintains on the process. Chromalox
cannot warrant any electric immersion heater 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 stainless steel sheath.

B. Medium Watt Density.
C. Light weight and low profile.
D. Manual rest cutout to shut off heater in an overtemperature

condition is standard.

WARNING: Users should install adequate controls and safety
devices with their electric heating equipment. Where the conse-
quences 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 recommenda-
tions.

Model

Dimensions (In.)

Approx.

Number

Volts Phase kW

A

B

C

Weight (Lbs.)

PTHF-302

240

1 or 3

3

16

7

9

7

PTHF-304

480

1 or 3

3

16

7

9

7

PTHF-402

240

1 or 3

4

18

9

9

8

PTHF-404

480

1 or 3

4

18

9

9

8

PTHF-602

240

3

6

22

13

9

9

PTHF-604

480

3

6

22

13

9

9

PTHF-802

240

3

8

27

18

9

10

PTHF-804

480

3

8

27

18

9

10

PTHF-1002

240

3

10

31

22

9

11

PTHF-1004

480

3

10

31

22

9

11

Specifications

INSTALLATION

WARNING: Hazard of Electrical Shock. Disconnect all
power before installing heater.

1. WARNING: Do not scrape or scratch thermal cutout capil-

lary on heating elements. Damage could result.

2. Before installing the type PTHF heater, inspect it for possible

damage which may have occurred during shipment. Also, check
to insure the line voltage is the same as that on the nameplate.

3. WARNING: Mount heater in the tank so the liquid level will

always be above the effective heated portion of the heater. If
heater is not properly submerged, it will overheat and damage
the heating elements and create a possible fire due to exces-
sive sheath temperature.

4. In an electroplating operation the heaters are not, under any

circumstance, to be placed between the electrodes and the work.

4-5/8"

A

±1/4"

B

±1/8"

C

±1/8"

2-13/16"

Spacer Bar
1/2"

1"

9-1/8"

±1/4"

Cold End

1-1/2"

7/8 Dia. Hole Each Side
For 1/2 in. Conduit

Integral Manual Reset
Thermal Cutout

Cat No. Volts Watts

Phase Date Code

Part Number

5/16" x 1-1/2"

Slot For Mounting

2 Places

6"

5"

4-11/16"

1-1/2"

B Dimension is heated section. C Dimension is cold section.
Note: “XX” after model number denotes special dimensions.

Figure 1

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