KMC Controls CTE-3017, CTE-3026, CTE-3016, CTE-3027 Installation Manual

Low Limit Controllers, DPDT

Installation Guide

CTE-3016/3017/3026/3027

Mounting

The controller can be mounted in any position,
but avoid locations subject to excessive vibration.
For manual reset models, position the controller to
permit convenient access to the reset buon.

1. Loosen the front screw and remove the cover.

2. Using the two 3/8" mounting keyholes, mount
the case ush against the duct work or any at
surface.

3. Install the sensing capillary in a horizontal
serpentine fashion across the downstream side of
a water coil.

4. Using the included HMO-4523 capillary clips,
support the sensing capillary at sucient points
to prevent damage from vibration and/or air
movement.

CAUTION

Do not kink or apply excessive force to the capillary
element.

5. Make the appropriate connections to the terminal
blocks. (See the Wiring section.)

Wiring

An opening for installing a connector for 1/2" conduit
is provided in the boom of the case.

All wiring should comply with national and local
electrical codes. Using 14 AWG solid copper wire is
recommended.

Strip wire ends 3/8", insert the wire ends under
the cup washers on the switch block, and securely
retighten terminal screws. Wire terminals according

to the Actuation and Reset section on the next page.

CTE-3016/3017/3026/3027 1 Installation Guide

CTE-3017 Shown

Actuation and Reset

Specifications

Terminals 11 and 21 are “common” terminals, 14
and 24 are Normally Closed (above setpoint), and
12 and 22 are Normally Open (see the diagram
below). When the sensed temperature falls below
setpoint, connections “11–14” and “21–24” open and
connections “11–12” and “21–22” close. The switch

latches in this position until the sensed temperature
rises 5° F (3° C) above setpoint and the controller is
reset either (depending on the model) automatically
or manually by depressing the reset buon located in
the top of the controller case.

The controller cannot be manually reset until the
sensed temperature is at least 5° F (3° C) above the
setpoint.

22 (NO)

24 (NC)

21

(Common)

(Connections Shown in Above-Setpoint, NC, Unactuated Position)

11

(Common)

12 (NO, Closes
on Low Temp.)

14 (NC, Opens
on Low Temp.)

Setpoint Adjustment

The setpoint is the temperature at which contacts
“11–14” and “21–24” open as the unit senses a fall in
temperature. To adjust the setpoint:

• Turn the range adjustment screw CW to decrease
the setpoint.

• Turn the range adjustment screw CCW to
increase the setpoint.

Range 34° to 70° F (1.1° to 21° C)

Dierential 4.5° F xed (2.5° C)
Switch Action DPDT

Element

Electrical Ratings

Inductive 14 FLA (Full Load Amperes)

84 LRA (Locked Rotor

3/4 HP @ 120 VAC, 2 HP @ 240

Pilot Duty 720 VA max. @ 120 to 600 VAC,

Approvals CUL US Listed, CE Compliant,

Weight 1.2 lbs. (0.54 kg)

Materials Plated steel case, plastic cover

Mounting Surface mount with capillary

Temperature Limits

Operating –60 to 160° F (–51 to 71° C)
Shipping –60 to 160° F (–51 to 71° C)

NOTE: See the CTE-3016/3017/3026/3027 Data

3/32" (2.4 mm) diameter, 6-foot

(183 cm) or 20-foot (607 cm)
length, vapor-lled, tin-plated
copper capillary, maximum
temperature 300° F (149° C)

@ 120 VAC, 12 FLA @ 240 VAC

Amperes) @ 120 VAC, 72 LRA
@ 240 VAC

VAC

144 VA max. @ 24 VAC

RoHs compliant

installed in horizontal serpen­tine paern

Sheet (717-035-21) for more information.

Testing

A manual test lever located under the cover (below
and to the le of the controller spring) allows the
unit to be manually actuated during system tests.

Accessories

HMO-4523 Capillary Clip (3 or 5 provided,

depending on length)

Maintenance

No routine maintenance is required. Each compo­nent is designed for dependable, long-term reliabil­ity, and performance. Careful installation will also
ensure long-term reliability and performance.

© 2010 KMC Controls, Inc. 717-019-21B

CTE-3016/3017/3026/3027 2 Installation Guide

Important Notices

The material in this document is for information
purposes 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; [e-mail]