KMC Controls CTC-1621/1622 Two-Pipe Pneumatic, Room Thermostats Data Sheet
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Description and Application 1
Specifications 1
Features 1
Models 1
Accessories 2
Dimensions and Details 2
CTC-1621/1622
Two-Pipe, Pneumatic, Room Thermostats
Description and Application
These thermostats are designed for proportional control of pneumatic valve and damper actuators in HVAC systems. They utilize a highly sensitive bimetal element with feedback and a pilot bleed relay for accuracy and stability.
Models are available with with direct or reverse proportional action. The thermostat’s throttling range is factory-set and is field adjustable. Setpoints are adjusted using sliders which can be locked or limited using setpoint stops (HFO-0027).
The thermostats require a scale plate assembly and cover. These items may be ordered separately or in a value package (CTC-162X-103) that includes the most commonly ordered accessories (see the
Models and Accessories sections).
Specifications
Setpoint Range 55 to 85° F (13 to 29° C), adjustable via slider (adjuster may be concealed and locked or limited)
Throttling Range 3 to 12° F (1.7 to 6.7° C) factory set @ 3° F, field adjustable up to 12° F
Calibration 9 psi (62 kPa) branch pressure
Air
Supply Pressure 20 psi (138 kPa),
30 psi (207 kPa) maximum
Output Capacity 200 scim (55 mL/s)
Consumption 20 scim (5.5 mL/s)
Material Black flame-retardant plastic
Weight
Temperature Limits
Operating
Shipping
3 oz. (85 grams)
40° to 120° F (4° to 49° C)
–40° to 140° F (–40° to 60° C)
Features
(Shown with Horizontal Scale Plate and Light Almond Cover Installed)
♦ Sensitive bimetal element and pilot relay provide consistent, accurate feedback
♦ Direct or reverse acting (see the Models section), proportional control of valve or damper actuators
♦ Field-adjustable throttling range
Models
CTC-1621 Direct acting
CTC-1621-103 Direct acting, value package *
CTC-1622 Reverse acting
CTC-1622-103 Reverse acting, value package *
* Thermostat value packages contain the necessary components to allow replacement of most Barber-
Colman, Johnson Controls, L&G-P, or Robertshaw/
Invensys thermostats. They also offer easy ordering of just one part number to furnish all necessary components and mounting hardware for vertically
(only) mounted thermostats. In addition to a CTC-
1621 or CTC-1622 base, the packages contain these accessories:
HPO-0048-10 °F vertical scale plate
HPO-1511 Light almond, full window, ABS thermostat cover
HMO-5030 Light almond backplate kit with decorative matching plate
HPO-1320
HFO-0027
Label strip
Setpoint stops strip
Specifications and design subject to change without notice.
Accessories
Backplate kit (allows thermostat to be mounted to
2x4 handy box, includes 2 #6-32 screws and decorative matching 2.75 x 4.5" plate):
HMO-5024
HMO-5026
Light almond w/ aluminum trim
White w/ aluminum trim
HMO-5030 Light almond
HMO-5031 White
Dimensions and Details
All dimension are in inches (mm)
Thermostat scale plates (includes 2 each HPO-0046 scale plate pins):
HPO-0047-10 ° F, horizontal
HPO-0048-10
HPO-0049-11
HPO-0050-11
° F, vertical
° C, horizontal
° C, vertical
Thermostat covers, blank :
HPO-1501 Light almond ABS plastic
HPO-1502
HPO-1503
White ABS plastic
Brushed aluminum
Thermostat covers, full window :
HPO-1511
HPO-1512
HPO-1513
Light almond ABS plastic
White ABS plastic
Brushed aluminum
Miscellaneous accessories:
HFO-0027 Setpoint stop strip, 4 “stops” per strip
HFO-0028
HMO-5023
Tubing kit, 3/32" ID
Mounting strap for mounting on hollow walls, includes 2 #6-
32 x 2" screws and “template” printed on envelope
HPO-0044
HPO-0046
HPO-1320
Replacement thermostat cover screws
Replacement scale plate pins
Replacement label strip (1 furnished with each cover), 3 labels per strip (for day/night, summer/winter or heating/cooling indication)
Cover Height (not shown) = 1-7/8" (47 mm)
CAUTION
Pneumatic devices must be supplied with clean, dry control air. Any other medium (e.g., oil or moisture contamination) will cause the device to fail.
KMC Controls, Inc.
19476 Industrial Drive, New Paris, IN 46553
574.831.5250
www.kmccontrols.com
© 2014 KMC Controls, Inc. 510-035-02G

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