Siemens POWERS Free Energy Band TH 193 HC Technical Instructions
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Siemens POWERS Free Energy Band TH 193 HC Technical Instructions

Siemens POWERS Free Energy Band TH 193 HC Technical Instructions

Hesitation room thermostat
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POWERS
Free Energy Band
Hesitation Room Thermostat
Description
Features
™
CONTROLS
®
TH 193 HC
The TH 193 HC Hesitation Thermostats are proportional, single output, dual setpoint,
two-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 changes to modulate control air through a flapper nozzle. As
the heating load decreases due to internal heat gains, a deadband of control minimizes
energy consumption while the setpoint changes from 72°F (22°C) heating mode to 78°F
(26°C) cooling mode. Two setpoint dials allow adjustment of the deadband (4°F [2°C]),
minimum). Air connections are made with 5/32-inch (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.
·
Direct and reverse acting.
·
Two separate, adjustable temperature setpoint indicating dials.
·
Two highly sensitive bimetal thermostatic elements.
·
Fahrenheit or Celsius models.
·
Field adjustable deadband output pressure.
·
Individual field adjustable sensitivity with graduated scale.
·
Integral field adjustable limit stops.
·
Control pressure test port accessible without removing cover.
·
Easily replaceable thermometer, setpoint dials, filters and restrictor plate.
·
Covers available for concealed or exposed thermometers and for concealed, key,
or exposed knob adjustment and setpoint indication.
·
Standard plastic thermostat covers provide Desert Beige or white finish.
Technical Instructions
Document No. 155-069P25
TH 193-5
March 23, 2018
Siemens Industry, Inc.

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Summary of Contents for Siemens POWERS Free Energy Band TH 193 HC

  • Page 1 Easily replaceable thermometer, setpoint dials, filters and restrictor plate. · Covers available for concealed or exposed thermometers and for concealed, key, or exposed knob adjustment and setpoint indication. · Standard plastic thermostat covers provide Desert Beige or white finish. Siemens Industry, Inc.
  • Page 2 2. Is the heating and cooling control direct or reverse acting? 3. Where is the setpoint adjustment knob located? a. Adjustment knob located at bottom of chassis. b. Adjustment knob on front with 1/2-inch exposed knob. Page 2 Siemens Industry, Inc.
  • Page 3 5. Is finish of cover standard or optional? The standard finish color for plastic and metal covers is Desert Beige. · For white plastic cover option, add “W” suffix code to cover part number (for example: 192-256W). See Table 2. Siemens Industry, Inc. Page 3...

  • Page 4: Specifications

    Calibration 72°F (22°C) 7.5 psi (52 kPa) Sensitivity 2.5 psi/°F (31 kPa/°C) Limit stop adjustment 45°F and 85°F (7°C and 30°C) Standard cover Cycolac, desert beige Shipping weight 0.7 lbs. (0.3 kg) Dimensions See Figure 9. Page 4 Siemens Industry, Inc.

  • Page 5: Operation

    The deadband spans from 0°F to 40°F (-17°C to 4°C) with a 3 to 15 psi (21 to 103 kPa) output pressure. When the deadband elapses, cooling increases from 8 to 15 psi (52 to 103 kPa). Siemens Industry, Inc. Page 5...

  • Page 6: Thermometer Calibration

    Adjust the relief valve until the control temperature and the cooling dial to pressure is at the deadband output maximum temperature. pressure. Step 3 — Set heating and cooling dials to desired setpoints. The deadband is between these two setpoints. Page 6 Siemens Industry, Inc.

  • Page 7: Limit Stop Adjustment

    4 psi/°F 1 psi/°F (50 kPa/°C) Figure 7. TH 193 HC Hesitation (12 kPa/°C) Sensitivity Adjustment. NOTE: If the thermostat sensitivity is adjusted, the thermostat must be recalibrated. Siemens Industry, Inc. Page 7...

  • Page 8: Thermostat Calibration

    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 Read the valve until the pressure is at least 5 control pressure. psi (35 kPa). Allow the thermostat to stand for about five minutes to adjust to the new setting. Siemens Industry, Inc. Page 9...

  • Page 10: Troubleshooting

    The output pressure test port is accessible without removing the thermostat cover through the 8th opening from the top left side for two-pipe thermostats. Figure 8. Accessing Output Pressure Test Port. Page 10 Siemens Industry, Inc.
  • Page 11 5. Remove the filters from the existing connector and insert in new connector. Or, if filters are dirty, use restrictor replacement kit P/N 192-321 to replace filters. 6. Use the Chassis Tube Connector Replacement Kit 192-525 to replace the connector and mounting screws. Siemens Industry, Inc. Page 11...

  • Page 12: Service Parts

    20 scim (5.4 ml/sec) restrictors for one-pipe systems (package of 5). (1/4-inch, 6.4 mm, O.D. plastic barb unless noted.) Brass coupling, 1/8-inch NPT (1 only). 184-040 Coupling 184-116 184-113 Pre-piped dual tee for dual one-pipe systems 184-130 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 trademark and Free Energy Band 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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