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Siemens Powers Controls Pneumatic Thermostats Quick Reference Guide
Quick reference guide for Siemens Powers Controls pneumatic thermostats. Includes features, applications, and operational overviews for 192, 193, 832, 356, 357, 188, and 134 series models.
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Click an image to enlargeQuick guide from the manual
This document serves as a quick reference guide for the Siemens Powers Controls line of pneumatic thermostats. It provides an overview of features and typical applications for various models, including the 192, 193, 832, 356, 357, 188, and 134 series. Users should consult the specific technical instructions for each model for detailed installation and calibration procedures.
192 Series Pneumatic Room Thermostats
The 192 series includes several variants designed for commercial and institutional facilities:
- 192 S (Single Setpoint): Available in 1-pipe (limited output) and 2-pipe (high output) configurations. Features a sensitive bimetallic element and adjustable limit stops.
- 192 DN/DNV (Day/Night/Vent): Designed for cooling equipment, these models perform automatic setback changes from day to night. The DNV model includes a purge sequence for ventilation.
- 192 HC (Heating/Cooling): Features dual setpoint dials and automatic seasonal adjustment between heating and cooling setpoints.
193 HC Series
These thermostats are designed for energy management in buildings with varying heating and cooling requirements:
- 193 HC Free Energy Band: Features an adjustable free energy band to sequence heating and cooling valves, reducing energy consumption.
- 193 HC Hesitation: Allows for a customizable deadband range (3, 4, or 5 psi) to prevent simultaneous heating and cooling.
832 D and Retroline Series
- 832 D "All-Metal": A rugged, all-metal thermostat designed for radiation, ventilation, or air conditioning systems. Features rapid response and quiet operation.
- Retroline Powerstar: A retrofit kit for 2-pipe applications, including cover kits and installation hardware for upgrading existing systems.
Limitem and Specialized Thermostats
- 356 Limitem Rigid Bulb: Provides primary control for unit ventilators and fan coils. Features a durable copper motor tube and steel rod sensing element.
- 357 D Limitem Remote Bulb: Offers remote or averaging bulb options for flexible installation in air handling units.
- 188 Unit Mounted: Designed for fan coil induction units, featuring a liquid-filled thermal system and universal mounting bracket.
- 134 Pneumatic High/Low Temp: A snap-acting switch used for high or low limit applications, such as shutting down fans or closing dampers when temperature thresholds are exceeded.
Thermostat Accessories
Siemens offers various accessories, including covers with concealed or exposed setpoint adjustments, and specialized calibration tools for the 192, 193, and 832 series.
Manufacturer information
Siemens AG
Practical help
Common problems
Simultaneous heating and cooling
Consider using the 193 HC Hesitation model, which allows for an adjustable deadband range to prevent overlap.
Insufficient air capacity for multiple valves
Ensure the system is configured for 2-pipe operation, which supports higher output capacity compared to 1-pipe configurations.
Before use
- Verify if the application requires a 1-pipe or 2-pipe configuration.
- Determine if the system requires a direct or reverse acting model.
- Check the required temperature operating range for the specific model.
- Confirm if the installation requires a wall mount, duct mount, or remote bulb configuration.
Specs in practice
- 1-pipe configuration
- Used when limited output air capacity is required to operate a single valve or actuator; requires an external restrictor.
- 2-pipe configuration
- Used for high output capacity to control multiple valves and actuators.
- Direct Acting
- Output pressure increases as the sensed temperature increases.
- Reverse Acting
- Output pressure decreases as the sensed temperature increases.
Images and diagrams
- The manual provides visual overviews of the thermostat series, showing the physical differences between models like the 192 series and the remote bulb 357 D.
- The Retroline kit image illustrates the components included for retrofitting, such as the cover kit and mounting hardware.
Model compatibility
- 192 series covers are available in plastic (desert beige and white) and metal (desert beige only).
- Retroline kits are available for most 2-pipe applications.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.