Siemens TH 192 S Technical Instructions
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Siemens TH 192 S Technical Instructions

Power control single temperature room thermostat
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TH 192 S Single Temperature
Room Thermostat
Description
Features
Optional Design
Features
The TH 192 S thermostats are proportional single output, single setpoint, 1-pipe (low air
capacity) or 2-pipe (high air capacity) sensor controllers. Each thermostat includes a
wall mounting plate for installation in a variety of rough-in terminal boxes. A sensitive
bimetal responds to temperature change to modulate control air through a flapper
nozzle. One setpoint dial is provided. 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) that
slide into the wall mounting plate.
•
Direct and reverse acting models for one- and two-pipe.
•
Fahrenheit or Celsius setpoint dials.
•
Highly sensitive bimetal thermostatic element.
•
Field adjustable sensitivity with graduated scale.
•
Integral field adjustable limit stops.
•
Control pressure test port accessible without removing cover.
•
Easily replaceable thermometer, setpoint dial, filters, and restrictor plate.
•
Covers available for concealed or exposed thermometers and for either concealed,
key, or exposed knob adjustment and setpoint indication.
•
Standard plastic thermostat covers provide Desert Beige or white finish.
•
Fixed temperature limit stops meet government specifications.
•
Competitor adapter mounting kits available.
•
Metal covers available in standard configurations with Desert beige or white finish.
•
Some thermostat chassis are available with optional 1/2-inch, large setpoint
adjustment knobs.
Technical Instructions
Document No. 155-065P25
October 28, 2010
POW ERS
TH 192-1
Siemens Industry, Inc.

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Summary of Contents for Siemens TH 192 S

  • Page 1 POW ERS Description The TH 192 S thermostats are proportional single output, single setpoint, 1-pipe (low air capacity) or 2-pipe (high air capacity) sensor controllers. Each thermostat includes a wall mounting plate for installation in a variety of rough-in terminal boxes. A sensitive bimetal responds to temperature change to modulate control air through a flapper nozzle.
  • Page 2 Use TH 192 S 1-pipe thermostats with an external restrictor (20 scim, 5.4 ml/sec) where a limited air capacity operates a single valve and/or actuator. Use TH 192 S 2-pipe thermostats where multiple valves and actuators, used with or without high/low limiting controls, require higher air capacities.
  • Page 3 Technical Instructions Document Number 155-065P25 October 28, 2010 Product Numbers See Table 1 for product number and ordering information on TH 192 S thermostat and Ordering chassis. Information 1. Is a one-pipe (low air capacity) or two-pipe (high air capacity) connection required...
  • Page 4 Technical Instructions Document Number 155-065P25 October 28, 2010 Covers See Table 2 for product number and ordering information on TH 192 S thermostat covers. 1. Is the setpoint adjustment exposed for customer adjustment or concealed to prevent alteration of setting? 2.

  • 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 S Dimensions in Inches (Millimeters). Siemens Industry, Inc. Page 5...

  • Page 6: Operation

    October 28, 2010 Operation In the TH 192 S direct acting thermostat, an increase in temperature increases the control air pressure and a decrease in temperature decreases the control pressure. In the TH 192 S reverse acting thermostat, an increase in temperature decreases the control air pressure and a decrease in temperature increases the control pressure.

  • Page 7: Limit Stop Adjustment

    TH 192 S Single Temperature Room Thermostat Technical Instructions Document Number 155-065P25 October 28, 2010 Limit Stop Thermostat limit stops define the Adjustment minimum and maximum thermostat setpoints. The limit stops engage in the setpoint cam gear teeth and cause interference between the setpoint cam gear and the adjustment knob gear.
  • Page 8 192-632 calibration tool or 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 8 Siemens Industry, Inc.

  • Page 9: Troubleshooting

    TH 192 S Single Temperature Room Thermostat Technical Instructions Document Number 155-065P25 October 28, 2010 Troubleshooting Before troubleshooting thermostat per Table 3, make certain there is clean dry supply air at 18 psi (124 kPa) minimum. Use test probe gauge and needle adapter to measure control pressure at thermostat test port.
  • Page 10 5. Remove filters from existing connector and insert in new connector. Or, if filters are dirty, use restrictor replacement kit 192-321 to replace filters. 6. Use chassis tube connector replacement kit 192-525 to replace connector and mounting screws. Page 10 Siemens Industry, Inc.

  • Page 11: Service Parts

    TH 192 S Single Temperature Room Thermostat Technical Instructions Document Number 155-065P25 October 28, 2010 Service Parts The following chart lists accessory parts and tools available for thermostat service. Table 4. Service Parts. Description Part Number 141-0573 Dial thermometer (-40 to 140°F, -40 to 60°C) with pocket case...
  • Page 12 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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