Chromalox Water Heater TBL User Manual

®
Chromalox  
SERVICE REFERENCE  
Installation Instructions  
DIVISION  
SALES  
4
SECTION TBL  
and  
REFERENCE  
PD433  
RENEWAL PARTS IDENTIFICATION  
161-058061-001  
DATE  
MARCH, 1984  
Type TBL and TBL-A  
Over-The-Side Salt Bath Heaters  
4
3/4" Conduit Hub  
A
2-5/8  
3/4  
6" Max.  
Heated  
B
3-19/32  
Model  
Dimensions (In.)  
Steel  
Sheath  
INCOLOY®  
Sheath  
Volts  
(Single Phase)  
kW  
20 W/In2  
A
B
TBL-1301  
TBL-4501  
TBL-6001  
TBL-7501  
TBL-A-131  
TBL-A-451  
TBL-A-601  
TBL-A-751  
3
4.5  
6
11-1/8 13-7/8  
11-1/8 15  
11-1/8 20-5/16  
14-5/8 25-9/16  
240 or 480  
7.5  
GENERAL  
Chromalox type TBL and TBL-A over-the-side immersion heaters  
are designed primarily for salt baths but are available in a variety of  
sheath materials and watt densities for most liquids and viscious mate-  
rials..  
1. Heater Construction Characteristics  
A. High quality Nichrome resistance wire held in place by com-  
pacted Magnesium Oxide in various sheath materials.  
B. Medium watt densities.  
C. Steel terminal box painted with heat and acid-resistant paint.  
D. Lightweight yet heavy duty.  
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 corrosive 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 conditions beyond  
our control.  
E. Riser type construction puts the heat at the bottom inducing  
natural “stirring action” and evenly distributed temperatures.  
CAUTION: Users should install adequate controls and  
safety 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  
1. Before installing the type TBL heater, inspect it for possible dam-  
age which may have occurred during shipment. Also, check to  
insure that the line voltage is the same as that stamped on the  
nameplate.  
2. IMPORTANT: Mount heater in the tank so that the liquid level  
will always be above the effective heated portion of the heater. If  
the heater is not properly submerged, it will overheat and damage  
the heating elements and create a possible fire hazard due to exces-  
sive sheath temperatures.  
5. When melting solids by direct immersion, a surface vent should be  
provided to allow gases to escape. Operate the heater on half volt-  
age until melted material completely covers the heater area.  
6. A drip loop is recommended to minimize passage of moisture  
along wiring into terminal box and connections.  
7. DANGER: Hazard of Fire. Since these heaters are capable of  
developing high temperatures, extreme care should be taken to:  
A. Use Explosion-resistant terminal housings in hazardous loca-  
tions. See Chromalox catalog for selection of explosion-resis-  
tant terminal enclosures for hazardous locations.  
3. Where work will pass over or near equipment, additional protec-  
tion, such as a metal guard, may be needed.  
B. Avoid contact between heater and combustible material.  
C. Keep combustible materials far enough away to be free of the  
effects of high temperatures.  
4. In an electroplating operation the heaters are not, under any cir-  
cumstance, to be placed between the electrodes and the work.  
© 2010 Chromalox, Inc.  
 

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