KMC Controls CTC-1653, CTC-1654 Installation Manual

2/3-Pipe, 2-Temperature, Pneumatic Thermostats, w/ Indexing

Installation Guide

Mounting

Mount the thermostats on an inside wall away from
direct sunlight, heat sources, windows, air vents, and
air circulation obstructions (curtains, furniture, etc.).
Choose the location best suited for measuring the
average room temperature. Units may be mounted
horizontally or vertically to either a 2" x 4" electrical
box or a hollow wall.

Electrical Box Mounting

1. Aach the HMO-5024/5026/5030/5031 backplate
to the box with the two 6-32 screws supplied.

2. Level the box using the slot in the backplate.

CTC-1653/1654

3. Fit the aluminum plate into the recess.

4. Pass the 3/32" ID tubing through access hole.

5. Make connections. See the Connections section.

6. Mount the thermostat to backplate with two 6-20
x 2" screws supplied with thermostat.

Hollow Wall Mounting

Thermostats may be directly mounted on walls up to
5/8" with the HMO-5023 kit.

1. Using the template, printed on the package, make
a 2-11/16" x 1-1/2" cutout.

2. Loosely mount the bracket to the thermostat with
two 6-32 x 2" screws supplied.

3. Make connections. See the Connections section.

4. Insert the bracket diagonally through the wall.

5. Center the thermostat and tighten screws.

Scale Plate

Adjustments must be made with the scale plate
removed. Complete adjustments before installing the
scale plate.

1. Remove all gauge tap rubber cap(s).

2. Slide plate under the setpoint indicator(s).

3 Insert retaining pins (two supplied), twisting to

lock into place.

4. Replace gauge tap cap(s).

Setpoint Options

• If setpoint indicators are not needed, simply snip
o the indicator(s) with wire cuers.

• Limit or lock the range of the setpoint(s) by
installing setpoint stops (HFO-0027) in the slider
track.

Cover Installation

1. Check that the unit is mounted securely and all
gauge tap cap(s) or accessories are installed.

2. Place longer, tapered ends of push-buon into the
two holes in the thermostat.

3. Align cover over push buons, so that short ends
protrude.

4. Slide the cover over the base.

5. Using a 1/16" hex wrench, turn both cover
mounting screws on the thermostat base CCW
(outward) until cover is secured.

NOTE: If used, blank covers require the removal of

the setpoint thumb adjusters. Insert a small
screwdriver in the slot between the thumb
adjuster and the cam and pry apart. Discard
the adjuster.

CTC-1653/1654 1 Installation Guide

Connections

Remote Indexing

The CTC-1653 and CTC-1654 use 3/32" ID tubing
(HFO-0028) for all connections.

1. Connect Main Air to Port M.

2. Connect Branch Air to Port B.

For a three-pipe application continue by:

3. Clipping o Port R’s tip.

4. Connecting Port R to the appropriate air line.

NOTE: Pressure at Port R will be 16 psi with 16 psi

main air pressure, and 25 psi with 25 psi
main air pressure. When pressure is at 25
psi, depressing the right (or top) indexing
buon will drop the R port pressure to 0
psi. See also the Remote Indexing section.

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.

Remote indexing is via dual main air supply pres­sure, and local indexing is by push-buon (HPO-

0045) control. Control of one temperature (right
indicator for horizontal, top for vertical) occurs when
the main air supply is 16 psi. The second tempera­ture (le indicator for horizontal, boom for vertical)
is selected when the main pressure is 25 psi. When
25 psi is supplied, control may be changed to the 16
psi indicator by pressing right (or top) buon. If de­sired, control can be returned to the 25 psi indicator
by pressing the le (or boom) buon. When main
air supply is changed to 16 psi, control automatically
returns to the 16 psi indicator.

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.

Output Signal: B

Secondary Output: R

Main Air: M

Local Indexing Button

CTC-1653/1654 2 Installation Guide

Optional

Secondary Device

(e.g., PE Switch)

M

Main Air

(Remote Indexing—

16 psi/day and 25 psi/night)

Controlled Device

(e.g., Valve)