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Technical Instructions
Document No. 155-067P25
TH 192-3
October 28, 2010
TH 192 DN Day-Night and
TH 192 DNV Day-Night-Vent
Room Thermostat
70
80
70
TH0357R1
POWERS
60
50
70
80
DA
Y
Description
The TH 192 DN and DNV thermostats are proportional single output, dual setpoint,
2-pipe or 3-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 change to modulate control air through a flapper nozzle. Two
setpoint dials are provided. When the supply air pressure changes from 18 to 25 psi
(124 to 172 kPa), the thermostat automatically switches from the day to the night
setpoint respectively. Air connections are made with 5/32” (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.
Features
•
Direct and reverse acting for day and night modes (DN models).
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Two separate adjustable temperature setpoint indicating dials.
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Two highly sensitive bimetal thermostatic elements.
•
Operating mode automatically switches from day to night on change of main air
supply pressure.
•
Manual override selector ensures off-hour occupancy comfort.
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Single screw adjustment for changeover switch setpoint.
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Individual field adjustable sensitivity with graduated scale for each mode.
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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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Fahrenheit or Celsius setpoint dials.
•
Covers available for concealed or exposed thermometers and for either concealed,
key, or exposed knob adjustment and setpoint adjustment.
•
Standard plastic thermostat covers provide Desert Beige or white finish.
Siemens Industry, Inc.
