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TH 192 DN Day-Night and
TH 192 DNV Day-Night-Vent
Room Thermostat
Description
Features
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.
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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.
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Operating mode automatically switches from day to night on change of main air
supply pressure.
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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.
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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.
Technical Instructions
Document No. 155-067P25
October 28, 2010
POW ERS
TH 192-3
Siemens Industry, Inc.
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Summary of Contents for Siemens TH 192 DN
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Page 1: Room Thermostat
POW ERS 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. - Page 2 Application TH 192 DN & DNV thermostats provide day to night (or weekend) temperature setback to control pneumatic valve and damper actuators in heating and cooling applications (Figure 1) such as air conditioners, space heaters, unit ventilators, and air volume controllers.
- Page 3 Figure 3. TH 192 DNV Figure 2. TH 192 DN Thermostat Connections. Thermostat Connections. Product Numbers See Table 2 for product number and ordering information on TH 192 DN & DNV and Ordering thermostat chassis. Information 1. Is a Fahrenheit or Celsius scale required? Chassis 2.
- Page 4 Document Number 155-067P25 October 28, 2010 Covers See Table 3 for product number and ordering information on TH 192 DN and DNV thermostat covers. 1. Is the setpoint adjustment exposed for customer adjustment or concealed to prevent alteration of setting? 2.
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Page 5: Specifications
TB 213 Aspirator Wall Box Kit 155-245 TB 214 Adapter Kits 155-231 TB 193 Guard Kit 155-222 TB 241 Test Head Kit 155-255 TB 167 Restrictors 155-213 Dimensions Figure 4. TH 192 DN and DNV Dimensions in Inches (Millimeters). Siemens Industry, Inc. Page 5... -
Page 6: Operation
Operation Day-Night Operation The TH 192 DN thermostat is either direct or reverse acting for both day and night operating modes. In a direct acting thermostat, an increase in temperature increases the control air pressure and a decrease in temperature decreases the control pressure. -
Page 7: Thermostat Details
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instructions Document Number 155-067P25 October 28, 2010 TH 192 DN and DNV Thermostat Details Figure 6. TH 192 DN and DNV Thermostat Details. Thermometer 1. Use a test thermometer to read the current room temperature. -
Page 8: Limit Stop Adjustment
Changing the limit stop position one gear tooth changes the limit stop setting by 1-1/3°F (0.7°C). Figure 8. TH 192 DN and DNV Limit Stop Adjustments. Sensitivity To change thermostat sensitivity, use a flat-blade... -
Page 9: Thermostat Calibration
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instructions Document Number 155-067P25 October 28, 2010 Thermostat The thermostat is factory calibrated to a control pressure of 7.5 psi (52 kPa) when the Calibration setpoint and the ambient temperature are both at 72°F (22°C). The factory sensitivity setting is approximately 2.5 psi/°F (31 kPa/°C). - Page 10 1/8” (3.2 mm) wrench until pressure is 7 to 8 psi (48 to 55 kPa). The sensing element is now in calibration and the setpoint can be changed to the desired room temperature. Page 10 Siemens Industry, Inc.
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Page 11: Troubleshooting
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instructions Document Number 155-067P25 October 28, 2010 Troubleshooting Before troubleshooting thermostat per Table 5, make certain there is clean dry supply air at 18 psi (124 kPa) for day control and 25 psi (172 kPa) for night. Use test probe gauge and needle adapter to measure control pressure at thermostat test port. -
Page 12: Service Parts
1/8” NPT male. Replacement for use with 192-633 Chassis tube connector replacement kit with mounting screws 192-525 (material for 10 thermostats included) Restrictor plate replacement kit with filters and gasket 192-321 (material for 10 thermostats included) Page 12 Siemens Industry, Inc. - Page 13 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Powers is a registered trademark of Siemens Industry, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners.
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