Siemens Free Energy Band TH 193 HC Technical Instructions

®
Powers Controls
Free Energy Band
Heating/Cooling Room Thermostat
Description
Features
®
TH 193 HC
The TH 193 HC thermostats are proportional dual output, dual setpoint, two-pipe (dual
one-pipe, low air capacity) or three-pipe (dual two-pipe, high air capacity) sensor
controllers. Each thermostat includes a wall mounting plate for installation in a variety of
rough-in terminal boxes. Sensitive bimetals respond to temperature changes to
modulate control air through a flapper nozzle. As the heating load decreases due to
internal heat gains, a dead band of control minimizes energy consumption while the
setpoint changes from 72°F (22°C) heating mode to 78°F (26°C) cooling mode. Two
setpoint dials allow adjustment of the dead band 4°F (2°C) minimum. Air connections
are made with 5/32-inch (4 mm) O.D. plastic tubing, directly to the thermostat chassis
for retrofit applications or with plug-in adapters (provided with the TH 192 rough-in
terminal box or optional accessories), which slide into the wall mounting plate.
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Direct and reverse acting for heating and cooling modes.
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Two separate adjustable temperature setpoint indicating dials.
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Two highly sensitive bimetal thermostatic elements.
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Fahrenheit or Celsius models.
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Individual field adjustable sensitivity with graduated scale.
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Integral field adjustable limit stops.
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Control pressure test port accessible without removing cover.
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Easily replaceable thermometer, setpoint dials, filters and restrictor plate.
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Covers available for concealed or exposed thermometers, and for concealed
adjustment and setpoint indication.
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Standard plastic thermostat covers provide Desert Beige or white finish.
Technical Instructions
Document No. 155-068P25
October 26, 2010
POW ERS
TH 193-4
Siemens Industry, Inc.