Crandall TK-1001-0-CSS Thermostat
The Crandall Stats & Sensors TK-1001-0-CSS Pneumatic Room Thermostat is a direct-acting, 2-pipe, 55 to 85 degree F pneumatic thermostat for proportional heating control. A direct-acting thermostat increases its branch output pressure as room temperature rises, and it is Crandall's version of the TK-1001 series, listed as the TK-1001-CS&S in the Crandall installer's guide. The factory photo shows the tan cover with the Crandall Stats & Sensors logo on the thermostat and on the cover inserts, a temperature scale window reading 80, 70, 60, 50, and a setpoint window showing 75.
The Crandall installer's guide for the TK-1001 and TK-1101 series describes the operating details. The air connection is 5/32-inch plastic tubing, with the black M tube as the supply main and the white B tube as the controlled branch line. Supply air is 15 or 20 psig, and calibration is done at 15 psig. Air capacity is 16 scim. The throttling range is factory set to 4 degrees F per 10 psi and is adjustable from 2 to 10 degrees F with the throttling range slider, and the guide advises setting it to the lowest value that controls the system without cycling. The maximum safe ambient is 150 degrees F, and the thermostat is built in Machesney Park, Illinois.
Install the thermostat where air circulates freely and where it senses the average space temperature, away from lamps, motors, direct sunlight and concealed ducts. The mounting plate attaches vertically to the electrical switch box with two flathead screws, the tubes push firmly onto the wall fittings (rotate them slightly as you push), and the thermostat is fastened to the plate with the Allen head screws, tightened evenly. To calibrate, remove the cover, back the test point screw out one turn with a 5/64-inch Allen wrench, attach a test gauge, set the dial to the room temperature shown on an accurate thermometer, and turn the calibration screw until branch pressure reads 8 psi, plus or minus 1 psi. Then tighten the test point screw and replace the cover. If output is zero and calibration does not fix it, check the restriction plate and filter for a blocked hole, otherwise replace the thermostat.
Key Benefits
- Direct-acting heating control: Branch pressure rises as the room warms, the standard TK-1001 action for 2-pipe pneumatic loops.
- Adjustable throttling range: 2 to 10 degrees F per 10 psi, set at 4 degrees F per 10 psi from the factory, so you can tune out cycling.
- Standard pneumatic hookup: 5/32-inch tubing, black main and white branch, on 15 or 20 psig supply air.
- Ready to mount: The factory photo shows the thermostat with its mounting plate, Allen wrench, mounting screws, dowel pin and two cover inserts, and the plate attaches to an electrical switch box.
Common Questions
What is the TK-1001-0-CSS?
It is a Crandall Stats & Sensors direct-acting, 2-pipe pneumatic room thermostat with a 55 to 85 degree F dial, in the TK-1001 series.
What supply pressure does it use?
15 or 20 psig of clean, dry air, and it is calibrated at 15 psig. The black M tube is the supply main and the white B tube is the branch.
Can I adjust how aggressively it controls?
Yes. The throttling range slider sets 2 to 10 degrees F per 10 psi. Start at the factory 4 degree setting and widen it only if the loop cycles.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.