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Adjustments and Calibration
Minor adjustment is required if a different setpoint is
desired.
1. Turn the setpoint adjustment clockwise to
increase (counter-clockwise to decrease). The
range may be moved up 5° F or down 10° F.
2. Obtain two thermometers and two containers
of tempered liquid that match the high and low
temperatures of the new setpoint span.
3. Move the CTC-4001/4004 thermostat between
the containers, allowing sufficient time for the
element to stabilize.
4. With the element in the "low" container, turn the
setpoint adjustment until port B is closed to port
C.
5. Then move it to the "high" container and verify
that port A is closed to port C.
6. Minor adjustment will be required in both
containers to obtain the desired 5° switching
band.
Maintenance
Port C has a non-replaceable built-in filter to prevent
dirt from hindering the switching action of ports
A and B. If the filter becomes clogged, replace the
CTC-4001/4004 thermostat.
No routine maintenance is required. Care should be
taken to keep the unit clean from dust during instal-
lation. Each component is designed for dependable,
long-term reliability, and performance. Careful
installation will also ensure long-term reliability and
performance.
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.
CTC-4001/4004
© 2011 KMC Controls, Inc.
Sample Application
CTC-16xx
Thermostat (DA)
M B
M
M
RCC-1012
Reversing Relay
NOTE: If the filtered port C on the CTC-400x is
used as an "output" (as shown in this
example), the air to ports A and C must be
from a filtered source or filtered with an
external filter (such as an HFO-0006).
NOTE: The CTC-400x is for low-volume
applications. Ports A and B are each
restricted with a 0.015" nozzle.
Important Notices
The material in this document is for information pur-
poses only. The contents and the product it describes
are subject to change without notice. KMC Controls,
Inc. makes no representations or warranties with respect
to this document. In no event shall KMC Controls, Inc.
be liable for any damages, direct or incidental, arising
out of or related to the use of this document.
KMC Controls, Inc.
19476 Industrial Drive
New Paris, IN 46553
574.831.5250
www.kmccontrols.com
info@kmccontrols.com
2
CTC-400x Duct Thermostat
will pass a DA or RA signal
to the CSC VAV Volume
Controller when the
airstream temperature
switches between heating
and cooling
CTC-400x mounted in
the airstream (inlet
side of the VAV box)
To load or CSC Volume
Controller thermostat input
Installation Guide
416-019-01B
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