Watlow FIREBAR Circulation Heater - Manual (Page 3)

WATLOW IND.
FIREBAR® Circulation Heater Installation & Maintenance Manual
I&M Number: 316-42-1-1 Page: 3
Date: 06-11-08 Rev: 2.00
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WATLOW IND.n # 6 INDUSTRIAL LOOP RD. n HANNIBAL MO, 63401n PHONE 573-221-2816 n FAX 573-221-3723
INLET
OUTLET
OUTLET INLET
Preferred Orientation
"TOP" stamped
on flange
"TOP" stamped
on flange
Optional Orientation
Figure # 1
If the tank is installed in any other position, it's important that "TOP" be located on the same side as the
nozzles. This will insure that element supports create a baffling effect, and that flow can easily move
through the element bundle. Unless fluid velocity is high, side orientation of nozzles and elements
are not recommended.
Figure #2 shows the preferred position of the circulation heater when pumping liquif from a tank through
the heater. The NPSH (Net Positive Suction Head) is one of the most important factors when
determining the location of the heater.
NPSH
PUMP
NPSH
PUMP
INCORRECT HEATER POSITION - HEATER ABOVE NPSH
CORRECT HEATER POSITION - HEATER BELOW NPSH
Figure # 2
Furnish adequate space for horizontal or vertical installation. Space should be allowed for immersion
heater removal from tank.