KMC CTC-1621 Installation Guide

Below you will find brief information for pneumatic room thermostat CTC-1621, pneumatic room thermostat CTC-1622. This document provides instructions for installing the CTC-1621/1622 two-pipe, single-setpoint, pneumatic, room thermostats which help to control the temperature in a room. It covers topics like mounting, electrical box mounting, hollow wall mounting, scale plate, setpoint options, connections, adjustments, maintenance, and calibration.

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CTC-1621/1622 Pneumatic Room Thermostat Installation Guide | Manualzz

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Key features

  • Single-setpoint control
  • Two-pipe system
  • Pneumatic operation
  • Adjustable throttling range
  • Factory calibrated
  • Easy installation
  • Multiple mounting options
  • Cover options

Frequently asked questions

Remove the scale plate, slide the black TR adjuster to the desired location, and gently rotate it with a 1/16" hex wrench. Ensure you don't turn it excessively. Finally, reinstall the scale plate.

Yes, you can mount the thermostat on hollow walls up to 5/8" with the HMO-5023 kit.

There are two cover styles available: window-insert covers with a symbol-coded label strip for setpoint indication and blank covers that require the removal of the setpoint thumb adjuster.

You can calibrate the thermostat by removing the cover and gauge tap rubber cap, installing a gauge with 3/32" ID tube, measuring the ambient temperature, moving the setpoint slider to the measured temperature, and adjusting the calibration adjustment with a 1/16" hex wrench until the test gauge indicates the desired pressure.
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