Thermostats of this family may be easily identified by
referring to the part number located on the carton and
on the back and side of the device. Stamped on the
back of the device is the date of manufacture (four
digits, the first two representing the week of the year
and the last two representing the year).
These thermostats are used for proportional control of
pneumatically activated valves, dampers and similar
devices in heating, ventilating and air conditioning
systems. See Performance table.
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