Schneider Electric (Barber Colman) TK-1101 Thermostat

The Schneider Electric (Barber Colman) TK-1101 Pneumatic Room Thermostat is a reverse-acting, 2-pipe thermostat for proportional pneumatic control. A reverse-acting thermostat decreases its branch output pressure as room temperature rises, which is the opposite response of the direct-acting TK-1001 heating thermostat, and it is used for cooling-duty control loops. The TK-1101 has a 55 to 85 degree F dial and a setpoint slider behind a small window, and it is built to run on 15 or 20 psig clean, dry, oil-free supply air.

Inside the cover a temperature-sensitive element positions the mechanism that sets the branch pressure. The black main tube brings supply air in and the white branch tube sends the controlled pressure to the valve or damper actuator, both through 5/32-inch spring-reinforced plastic tubing. The throttling range is adjustable from 2 to 10 degrees F per 10 psi, set at the factory to 4 degrees F per 10 psi, so you can tune the response to a tight or loose loop without cycling. Air consumption is 13.8 scim, air capacity is 16 scim, and the output signal runs from 0.5 psig up to supply pressure minus 0.5 psig. The thermostat is rated for operating ambient of 40 to 150 degrees F, with a maximum supply pressure of 30 psig. The unit measures about 4-3/8 inches high, 2-3/4 inches wide and 1-5/8 inches deep and mounts upright on the wall.

The TK-1101 is the base number for a wider family. Variant numbers that cross-reference to the TK-1101 include TK-1101-0-2, TK-1101-399, TK-1101-400, TK-1101-403, TK-1101-404 and TK-1101-704, so if you are matching an older thermostat, check the model tag on the cover. The -116 versions use a 13 to 29 degree C dial, and the -600 versions are aspirated with a brushed stainless cover. Common accessories for the two-pipe TK-1xxx line include the AT-61 series cover inserts, AT-104 dial stop pins, AT-101 lock cover kit, AT-505 surface mounting base, AT-506 pneumatic wall box fitting, AT-532 series tee restrictors, AT-546 auxiliary mounting base and the TOOL-095-1 pneumatic calibration tool kit. The factory photo shows the tan cover with the F 90, 80, 70, 60 temperature scale window, the setpoint window, the ventilation slots, and the black and white tubing ready to connect.

Key Benefits

• Reverse-acting control: Branch pressure falls as room temperature rises, the right action for cooling-duty pneumatic loops where the TK-1001 heating thermostat is the wrong action.
• Adjustable throttling range: Set anywhere from 2 to 10 degrees F per 10 psi, so you can match the loop and prevent hunting.
• Standard two-pipe pneumatic connections: 5/32-inch tubing with a black main and white branch, running on 15 or 20 psig supply air.
• Large accessory ecosystem: Works with the AT-61, AT-104, AT-101, AT-505, AT-506 and AT-546 accessories and the TOOL-095-1 calibration kit.

Common Questions

What is the difference between the TK-1101 and the TK-1001?
The TK-1101 is reverse-acting: output pressure drops as the room warms. The TK-1001 is direct-acting: output pressure rises as the room warms. Both are 2-pipe thermostats with a 55 to 85 degree F dial.

What supply air does the TK-1101 need?
Clean, dry, oil-free air at 15 or 20 psig, with a maximum of 30 psig. The main connection is the black tube and the branch is the white tube.

How do I check or calibrate it?
The TOOL-095-1 pneumatic calibration tool kit is the calibration tool listed for the TK-1xxx thermostats. Connect a test gauge to the branch line and compare branch pressure with an accurate room thermometer while you work the dial.

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.