The Siemens 192-840 Powerstar Retroline Retrostat Pneumatic Room Thermostat converts most existing pneumatic room thermostats to a Powerstar 192 direct, 2-pipe, single set point unit. The Day/Night or Heat/Cool Retrostat is factory-calibrated to match the appropriate changeover pressure of the competitive thermostat.
The complete kit includes a Retrostat cover kit with exposed or concealed set point adjustment, set point dial in Fahrenheit scale, factory-calibration for accuracy, all installation hardware and calibration wrench. The kit fits into large format wall openings, using “goof plate,” which is included, as are integral, field adjustable limit stops, a test port for fast check of output pressure without removing the cover, field replaceable thermometer, set point dials, restrictors, and filters. Standard case cover color is Desert Beige.
Product Specifications
| Part | Quantity |
| Retrostat Cover Kit | 1 |
| Thermostat * | 1 |
| Hardware kit | 1 |
| Optional 1/2-Inch Large, Exposed Setpoint Knob | 1 |
| Adapter Frame (192-308) | 1 |
| Required Tools | - Calibration and cover screw wrench (192-632) or 1/16” Allen wrench and 1/8” open-end wrench
- Medium flat-blade screwdriver
- Small level
- Accurate thermometer
- Needle nose pliers
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| * Includes thermostat installation instructions. |