Submittal Sheet

2 A28 Product Bulletin
Fig. 2 -- Interior view showing
high temperature (stage)
and low temperature
(stage) switches.
General Description
Controls are compact with
nonadjustable differential on
each switch. Knob range
adjustment and visible scale are
standard. Models are available
with a knob for field convertible
adjustment. These models are
supplied with a snap-in plug in
the cover for concealed
screwdriver slot adjustment.
Other features include a liquid-
filled, copper sensing element
which is unaffected by
barometric pressure and cross-
ambient temperature problems.
Controls may be supplied for
immersion applications for use
with a closed tank connector or
with a bulb well assembly. A low
cutout stop, which can be set in
the field, is an integral part of the
control.
Optional Constructions
Ambient Compensation
Available at extra cost.
Bulb
Coil bulb for low movement air
application may be supplied.
Also available is a 3/16 in.
(4.76 mm) diameter by 22 in.
(558 mm) long bulb for detecting
the average temperature in air
ducts.
Capillary
Capillary longer than 6 feet
(1.8 m) available at extra cost.
Capillary from 6 to 10 feet (1.8 to
3 m) in 2 foot (0.6 m)
increments; over 10 feet (3 m) in
5 foot (1.5 m) increments.
Packing Nut
Part No. FTG 13A-600R is
available for closed tank
applications where the
temperature does not fall below
–35°F (–37°C) or exceed
+250°F (121°C).
Maximum liquid pressure limit is
150 psig (1034 kPa). For
applications where the
temperature or liquid pressure
exceeds these limits, specify
Style 4 element with all metal
packing nut as an integral part of
the control.
Range Adjuster
Screwdriver slot with visible
scale or screwdriver slot with
internal scale and solid cover
optional at no extra cost
(quantity orders only). Models
are available with knob, snap-in
plug and remote bulb mounting
clip for field convertible
adjustment. This provides
conversion to knob, concealed
screwdriver slot or external
screwdriver slot adjustment.
Fig. 3 -- Drawing showing
snap-in plug removed and the
knob in line to assemble. Press
the knob onto the slotted shaft.