Adjusting, Selecting a range – White Rodgers 1629 User Manual
Page 2
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SELECTING A RANGE-
These
controls
are
provided
with
an
internal
dial,
covering the entire range of the control. The cover
has another dial graduated from 1 to 5. The selector
knob and this graduated dial are used to select a part
of the total range of the control.
Number
5
on
the
cover
dial
represents
the
lowest
temperature,
number
1
represents
the
highest
tem
perature.
The
selected
portion
of
the
internal
dial
is visible from the outside of the control.
To select a range, proceed as follows:
1.
Remove the selector knob by loosening the small
set screw in the end of the knob.
2.
Turn the adjusting shaft so that the minimum
desired
temperature
of
the
selected
range
is
directly
under
the
cover
indicator.
For
example,
if 32° is the minimum desired temperature, turn
the shaft to set the dial as shown here.
3.
Without
moving the adjusting
shaft, replace the
selector
knob,
pointing
it
to
number
5
on
the
cover dial.
4.
Tighten selector knob in this position.
■ADJUSTING-
B'TlXED INDICATOR
CCUT-OUT POINT)
C'DIFFEHENTIAL
ADJUSTING SCREW
'□"MOVABLE INDICATOR
CCUT-IN POINT)
DIAL SCREWS
These
controls
have
an
adjustable
differential.
The
movable indicator points to the temperature at which
the
compressor
starts.
The
fixed
indicator
points
to
the
temperature
at
which
the
compressor
will
stop.
The
difference
between
these
two
indicators
is the differential.
To set the control, proceed as follows;
1.
Remove
the
selective
knob
and
take
the
cover
off
the
control.
This
exposes
the
internal
dial.
Turn
the
dial
so
that
the
fixed
indicator
”B''
points
to
the
temperature
at
which
the
com
pressor is to stop.
Turn
the
differential
adjusting
screw
"C"
until
the movable indicator "D" points to the temper
ature at which the compressor is to start.
2.
3.