Watlow Electric 316-42-15-1 Electric Heater User Manual


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WATLOW IND. WATROD Modular Duct Heater Installation & Maintenance Manual
I&M NUMBER: 316-42-15-1 Page: 6
Date:6/11/2008 Rev: 2
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WATLOW IND.n # 6 INDUSTRIAL LOOP RD. n HANNIBAL MO, 63401n PHONE 314-221-2816 n FAX 314-221-3723
e) Reinstall new module through main flange and retighten using Allen head screws and split washers.
f) Reinstall jumpers and feed wire
g) Check circuit resistance to ensure that modules have been properly wired
Main Flange
Split Washer
Allen Screw
Module
To install high limit thermocouple kit:
a) Perform steps a - d above.
b) Use a 11/32” drill to drill a pilot hole at the location depicted by the “+” mark shown on the flange
below.
Watlow Modular Duct Heater
PN XXXXXXXXXX
XXXX W, XXX V, XPH, XXXX
TOP
c) Use a 1/8 NPT tap to thread the hole drilled in step b. Make certain that the hole being tapped
is perpendicular to the flange. If it is not perpendicular, electrical shorting may occur between the
compression fitting and the nearby electrical jumpers.
d) Thread the lower portion of the compression fitting in the hole tapped above.
e) Insert thermocouple through lower portion of compression fitting threaded into flange and through
hole in upper support bracket until transition fitting of thermocouple is bottomed out.
f) Tighten upper portion of compression fitting to firmly hold thermocouple in place.
g) Wrap thermocouple as shown in the diagram below about two times on a 2” diameter.
h) Attach tip of thermocouple to mid section of element using the hose clamp provided. The tip of the
thermocouple should not be covered by the hose clamp, but should extend about 3/16” from the
hose clamp.
i) Pass heat shrink provided over thermocouple leads and compression fitting. Heat shrink sleeving so
that it adheres to the shape of the compression fitting and thermocouple.
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