Product Overview

www.usa.siemens.com/hvaccomponents
Thermostats
A-9
Typical wall plate and screws.
192 DN Thermostat chassis.
192 DN Thermostat with plastic cover. Chassis wall plate
with easy maintenance plug-in adapters shown (optional).
Applications
The 192 DN and DNV Powerstar Pneumatic Room
Thermostat controls valves and damper actuators in
cooling equipment, automatically performing setback
changes from day to night. The 192 DNV also performs
a purge sequence at night to bring in “vent” outside air to
cool the building. A manual override selector switch allows
individual room or zone “day” control locally during the
night cycle.
During the night control cycle, the 192 DNV models
provide a separate output signal (full air supply) allowing
ventilation control. Periodic resetting to the “night” control
mode during evening or weekend periods using time
clocks ensures optimal energy management.
Recommendation
Use 192 DN or DNV for multiple valves and actuators, with
or without high/low limiting controls.
Description
Providing proportional dual setpoint, 2-pipe or 3-pipe high
air capacity pneumatic room temperature control, the
192 DN or DNV Powerstar Pneumatic Room Thermostat
automatically resets the room temperature setpoint during
unoccupied hours by changing the air pressure to the
thermostat. A manual override feature allows occupants
to switch to day mode. The override returns to night mode
the following night.
Features
• Dual setpoint dial available in Fahrenheit or
Celsius scales
• Available in direct or reverse acting models
• Sensitive bimetal responds to temperature changes
• Manual override selector for off-hour occupant comfort
• Adjustable changeover pressure
• Large volume air capacity relay
• Integral, fi eld adjustable limit stops
• Wall mounting plate for connection to a variety of
rough-in terminal boxes included
• Test port for fast check of output pressure without
removing the cover
• Field replaceable thermometer, setpoint dial, restrictor
and fi lters
Options
• Fixed limit stops to meet government specifi cations
• Quick-connect air connections for ease of installation
and service
• Large, 1/2" setpoint knob for convalescent homes
Application Drawings
Chassis Port Operation Mode Switching Relay
R2 Pressure (Air Supply) Connection
Full Air Supply Night (S=25 psig) A-D
0 psig Night Occupied B-D
0 psig Day (S=18 psig) B-D
Day/Night.
Day/Night/Vent.
Powerstar Day/Night/Vent
Pneumatic Room Thermostats
192 DN/DNV