Watlow FIREBAR Flange Heater - Manual (Page 3)

WATLOW IND.
FIREBAR® Flange Heater Installation & Maintenance Manual
I&M NUMBER: 316-42-2-1 Page: 3
Date: 6/11/2008 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
The recommended location for open tank heating is shown in Figure #1. The heater should be installed
as low as possible in the tank to take advantage of natural convection. Attention should be given to
sludge build-up and low liquid level. Location in either of these situations could cause premature failure.
During installation of the heater it is important that special attention be given to the final orientation of the
element. The flat side of the element must be positioned vertically as shown in Figure #2. Maximum
advantages are realized when the element is within +/- 25° of vertical. Positions outside this range are
not recommended, and 90° from vertical should always be avoided.
Each flange is marked with "TOP" to help clarify the preferred orientation. For open tank heating, this
marking should normally be on top of the final plug position. If this is not practical, it may be positioned
on the bottom, which will also orient the flat element vertical.
If heater is being installed in customer supplied circulation tank, a FIREBAR® Flange Circulation I&M
manual should be obtained from the factory to ensure safe installation of heater in tank. Failure to do this
could result in premature heater failure due to improper fluid flow over elements
SLUDGE
LIQUID LEVEL
2" MIN
ANSI WELD NECK FLANGE
TO MATCH HEATER FLANGE SIZE
HEATER REMOVAL
ALLOWANCE FOR
Figure # 1
25 25
TOP
TOP
CORRECT ORIENTATION INCORRECT ORIENTATION
Remove terminal enclosure to see element position
Figure # 2