Watlow Electric Water Heater Firerod Immersion User Manual

F I R E RO D® I M M E R S I O N  
Compact Unit Gives  
Versatility in  
Designing a Heating  
System  
FIREROD® immersion heaters package up to 300 W/in2  
(46.5 W/cm2) in a compact unit, giving you greater versatility  
in designing your heating system. This design solution is ideal  
for replacing large screw-plug immersion heaters.  
Features and Benefits  
Nickel-chromium resistance wire  
Precisely centered in the unit assures even, efficient  
distribution of heat to the sheath  
Magnesium oxide insulation  
Compacted to the proper density, results in high dielectric  
strength and contributes to faster heat-up  
Incoloy® sheath  
Aside from its versatile design, these heaters come complete  
with a brass 34 (19 mm) NPT double threaded screw plug,  
which allows you to add conduit boxes. Also, FIREROD  
immersion heaters are sealed at the lead end with a silicone  
rubber seal. Solid copper leads, with silicone rubber sleeve,  
are provided for unconfined wiring. These units are  
recommended for immersion in water or 90+ percent water  
soluble solutions.  
Resists corrosion from water  
Metallurgically-bonded conductor pins  
Ensures a trouble-free electrical continuity  
Lead end with silicone rubber seal  
Protects the heater against moisture contamination  
Performance Capabilities  
Optional stainless steel fittings  
Available for use in corrosive applications  
Maximum operating temperature in water to 100OC (212OF)  
at 14.7 psi  
Horizontal through the wall tank mounting  
Makes setup faster  
Maximum watt density to 300 W/in2 (46.5 W/cm2)  
240 and 480VÅ(ac)  
Maximum voltage to 480VÅ(ac)  
Provides wiring flexibility  
Applications  
Stock availability  
Same day shipment on various 58 in. diameter heaters with  
Plastic reclamation  
Food preparation  
Lab equipment  
3
4
in. NPT  
Nickel-Chromium  
Resistance Wire  
Incoloy®  
Sheath  
Magnesium  
Oxide Insulation  
STL-FRI-0505  
Double Threaded Brass  
12001 Lackland Road  
3
3
4  
in. NPT - 1 ⁄8 in. long*  
St. Louis, Missouri 63146 USA  
Phone: +1 (314) 878-4600  
FAX: +1 (314) 878-6814  
6 in. (150 mm) Solid Pins  
with Silicone Rubber Boots  
5
3
*Standard on ⁄  
8
and ⁄4 in. diameter heaters.  
Incoloy is a registered trademark of Special Metals Corporation.  
© 2005 Watlow Electric Manufacturing Company  
 

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