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ManualsBrandsSiemens ManualsHeating Supplies2-Pipe Powerstar 1 Setpoint/Output Reverse Acting Pneumatic Room Thermostat (45° to 85°F)

Siemens Industry, Inc.

POWERS

™

CONTROLS

Technical Instructions

Document No. 155-065P25

TH 192-1

February 7, 2022

TH 192 S Single Temperature

Room Thermostat

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. 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.

Features

• 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.

Optional Design

Features

• Fixed temperature limit stops meet government specifications.

• Competitor adapter mounting kits available.

• Metal covers available in standard configurations with Desert beige finish.

• Some thermostat chassis are available with optional 1/2-inch, large setpoint

adjustment knobs.

Summary of content (12 pages)

PAGE 1
Technical Instructions Document No. 155-065P25 TH 192-1 February 7, 2022 POWERS™ CONTROLS TH 192 S Single Temperature Room Thermostat 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
Technical Instructions Document Number 155-065P25 February 7, 2022 Application TH 192 S thermostats are temperature sensing devices that control pneumatic valve and damper actuators in heating and cooling applications such as air conditioners, space heaters, unit ventilators, and air volume controllers. The thermostats maintain energy management (maximum economy) and occupant comfort. TH 192 S thermostats are available with covers that conceal or expose the setpoint adjustment dial.
PAGE 3
TH 192 S Single Temperature Room Thermostat Product Numbers and Ordering Information Chassis Technical Instructions Document Number 155-065P25 February 7, 2022 See Table 1 for product number and ordering information on TH 192 S thermostat chassis. 1. Is a one-pipe (low air capacity) or two-pipe (high air capacity) connection required for application? 2. Is a Fahrenheit or Celsius scale required? 3. Is the control action direct or reverse acting? a.
PAGE 4
Technical Instructions Document Number 155-065P25 February 7, 2022 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. Is the thermometer exposed or concealed? 3. Is the setpoint indication exposed or concealed behind cover? 4. Is a plastic or zinc cast metal cover required? a. Plastic covers order 192-2XX. b. Metal covers order 192-3XX. 5.
PAGE 5
TH 192 S Single Temperature Room Thermostat Specifications Accessories Technical Instructions Document Number 155-065P25 February 7, 2022 Control action Operating range Supply air pressure, maximum Normal air supply pressure Sensitivity adjustment Nominal air consumption One-pipe Two-pipe Temperature Storage temperature Ambient operating temperature Temperature response Dial graduations Factory settings Calibration @ 72°F (22°C) See Table 1.
PAGE 6
Technical Instructions Document Number 155-065P25 February 7, 2022 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. Figure 5. TH 192 S Input/Output Characteristics. TH 192 S Thermostat Details Figure 6.
PAGE 7
TH 192 S Single Temperature Room Thermostat Limit Stop Adjustment Technical Instructions Document Number 155-065P25 February 7, 2022 Thermostat limit stops define the 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. To change limit stop settings, use needle nose pliers to pull limit stop between the setpoint cam gear teeth. Rotate limit stop to its new position.
PAGE 8
Technical Instructions Document Number 155-065P25 February 7, 2022 Page 8 Step 1 — Remove cover using 192-632 calibration tool. Verify room temperature is between 70 and 80F (21 and 27C). Step 2 — Verify that supply pressure is 18 psi (124 kPa). Set dial to room temperature by turning the exposed adjustment knob or using a hex key as shown. Allow thermostat to stand for about five minutes to adjust to the new setting.
PAGE 9
TH 192 S Single Temperature Room Thermostat Troubleshooting Technical Instructions Document Number 155-065P25 February 7, 2022 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. The output pressure test port is accessible without removing the thermostat cover through the 8th opening from the top.
PAGE 10
Technical Instructions Document Number 155-065P25 February 7, 2022 Table 3. Troubleshooting Guide.
PAGE 11
TH 192 S Single Temperature Room Thermostat Service Parts Technical Instructions Document Number 155-065P25 February 7, 2022 The following chart lists accessory parts and tools available for thermostat service. Table 4. Service Parts.
PAGE 12
Technical Instruction Document No. 155-065P25 February 7, 2022 TH 192 S Single Temperature Room Thermostat Service Parts (Continued) Table 4. Service Parts (Continued). Description Replacement thermometer kits, brown (packages of 5) Scale Range Thermostat Model 45° to 85°F Part Number 192-786 Models 1 and 2 Replacement setpoint dials (packages of 10) °F, Direct Acting Right Side 192-779 Information in this publication is based on current specifications.