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Siemens 192-840 TH192 Retrostat kit with 192 202 thermostat, pneumatic, 45 to 85F

SIEMENS

SIEMENS 192-840 TH192 RETROSTAT KIT W/192 202 thermostat

SKU CH-N4WY-CWJZG

A pneumatic thermostat kit replaces outdated units and provides proportional valve and damper control from 45 to 85F with field-adjustable limit stops and a test port

  • TypeLearning Thermostats
  • Replaces outdated thermostats of any brand with 2-pipe pneumatic control
  • Proportional single-output valve and damper actuation for large-volume HVAC systems
  • Field-adjustable limit stops enable on-the-fly calibration adjustments
  • Test port allows quick output-pressure checks without removing the cover
  • Operates in 45 to 85F range with included wall plate and mounting screws

Siemens Retrostat Kit Application

The Siemens 192-840 TH192 Retrostat Kit replaces outdated thermostats of nearly any brand to provide proportional single-output pneumatic valve and damper actuator control. It is designed for large-volume heating and cooling applications requiring a 2-pipe thermostat solution.

Ideal for Pneumatic System Upgrades

This kit suits facilities managers upgrading legacy pneumatic controls who need field-adjustable limit stops and a test port for quick output pressure checks without removing the cover. It is not for installers requiring electronic or digital control protocols, nor for systems needing multi-output actuator management.

Temperature Range and Capacity

The thermostat operates within a 45 to 85F range, delivering proportional control for single pneumatic outputs in large commercial spaces. Headroom ends at the upper limit of 85F, making it unsuitable for processes demanding higher temperature setpoints or multi-zone sequencing beyond a single actuator.

Highlights

  • Replaces outdated thermostats of any brand with 2-pipe pneumatic control
  • Proportional single-output valve and damper actuation for large-volume HVAC systems
  • Field-adjustable limit stops enable on-the-fly calibration adjustments
  • Test port allows quick output-pressure checks without removing the cover
  • Operates in 45 to 85F range with included wall plate and mounting screws

Specifications

BrandSIEMENS
TypeLearning Thermostats

Questions about this item

What pneumatic supply and control lines must already be in place for the 192-840 Retrostat kit to operate?

The kit requires a 2-pipe pneumatic supply and a proportional output line to drive valve or damper actuators in large-volume heating and cooling systems.

Will the 192-840 kit work with the existing rough-in box from my old thermostat?

Yes, the included wall plate and screws are designed to connect to a variety of rough-in boxes, letting you reuse the existing mounting point.

How can I verify the 192-202 thermostat is delivering the correct output pressure after installation?

Use the built-in test port to check output pressure without removing the cover, confirming the 45 to 85F setpoint range is active.

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