Crandall TK-1001-116-CSS Thermostat
The Crandall Stats & Sensors TK-1001-116-CSS Pneumatic Room Thermostat is the Celsius-dial version of the TK-1001 series: a direct-acting, 2-pipe thermostat with a 13 to 29 degree C dial for proportional heating control. Direct-acting means the thermostat increases its branch output pressure as room temperature rises. The -116 suffix is the Celsius dial designation used across the TK-1001 and TK-1101 series, so the TK-1001-116-CSS is the part to specify when the building and its drawings use Celsius setpoints.
The Crandall installer's guide lists the TK-1001-116 alongside the TK-1001 in the same heating, direct-acting group, with the same 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. Supply air is 15 or 20 psig, air capacity is 16 scim, the maximum safe ambient is 150 degrees F, and the throttling range is factory set to 4 degrees F per 10 psi and adjustable from 2 to 10 degrees F with the throttling range slider. The reverse-acting cooling counterpart in the series is the TK-1101-116, so confirm the action on your existing thermostat before you replace it.
Mount it on a standard electrical switch box with the mounting plate and flathead screws, push the tubes onto the wall fittings, and fasten the thermostat to the plate with the Allen head screws. Choose a location with free air circulation that represents the average space temperature, away from lamps, motors, sunlight and concealed ducts. Calibrate at 15 psig supply by setting the dial to the room temperature on an accurate thermometer and adjusting the calibration screw until branch pressure reads 8 psi, plus or minus 1 psi. For a checkout, turn the dial to its warm end and confirm branch pressure drops, then to its cool end and confirm it rises. Field repair is not recommended, so replace the thermostat if it will not calibrate.
Key Benefits
- Celsius dial: A 13 to 29 degree C scale for projects and buildings that specify setpoints in Celsius.
- Direct-acting heating action: Branch pressure increases as room temperature rises, the standard TK-1001 response.
- Adjustable throttling range: 2 to 10 degrees F per 10 psi, factory set at 4 degrees F per 10 psi.
- Standard two-pipe pneumatic connections: 5/32-inch tubing, black main, white branch, 15 or 20 psig supply air.
Common Questions
What does the -116 mean on the TK-1001-116-CSS?
It designates the Celsius dial, a 13 to 29 degree C scale, instead of the 55 to 85 degree F scale on the TK-1001.
Is it direct-acting or reverse-acting?
Direct-acting. Branch pressure rises as the room warms. The reverse-acting version in the series is the TK-1101-116.
What supply pressure does it need?
15 or 20 psig of clean, dry, oil-free air. Calibration is done at 15 psig, with branch pressure set to 8 psi, plus or minus 1 psi.
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.