Brochure

features
A-9
www.sbt.siemens.com/hvp/components
Description
Applications
Thermostats & Hygrostats
192 DN/DNV
Powerstar Day/Night/Vent
Pneumatic Room Thermostats
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).
The 192 DN and DNV Powerstar Pneumatic Room
Thermostat controls valves and damper actuators in cool-
ing 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 individu-
al 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.
• Dual set point 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 oc-
cupant comfort
• Adjustable changeover pressure
• Large volume air capacity relay
• Integral, field 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, set point
dial, restrictor and filters
Options
• Fixed limit stops to meet government speci-
fications
• Quick-connect air connections for ease of
installation and service
• Large, 1/2” set point knob for convalescent
homes
Providing proportional dual set point, 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 set point dur-
ing 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.
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.