User Guide

4 A70, A72 Product Bulletin
Fig. 3 -- Where it is desirable for
the user to increase or decrease
the DIFFERENTIAL ONLY,
external adjusting knob is
supplied on differential screw as
shown. Knob is provided with
stops and factory assembled to
permit change only within
specified limits.
Fig. 4 -- External adjusting knob
may be placed on range screw,
as shown where it is necessary
for the user to raise or lower both
CUT-IN and CUTOUT points
(differential remains constant).
Knob is provided with stops and
factory assembled to permit
adjustments within
specified limits.
Note: Knob is usually factory
assembled in either position as
shown in Figs. 3 and 4,
depending upon specifications of
original buyer. However, knob
may be changed in the field from
the differential to the range screw
or vice versa by loosening set
screw and removing knob and
indicator plate and reversing their
positions. Assuming that knob is
factory assembled on range
screw (Fig. 4) and set to limit
adjustment to 10°°F (12°°C), this
adjustment will become
approximately 5°°F (-15°°C)
if knob is placed
on differential screw (Fig. 3).