beautypg.com

KMC Controls CTC-1622 User Manual

Installation guide, Mounting, Mounting 1

background image

CTC-1621/1622

1

Installation Guide

Installation Guide

Two-Pipe, Single-Setpoint, Pneumatic, Room Thermostats

CTC-1621/1622

Mounting

Location

For optimum performance, the thermostat must be

mounted on an interior wall and away from heat

sources, sunlight, windows, air vents, and air circula-

tion obstructions (e.g., curtains, furniture). Units may

be mounted horizontally or vertically to either a 2" x

4" electrical box or a hollow wall.

1. Using the template printed on the HMO-5023

package, make a 2-11/16" x 1-1/2" cutout.

2. Loosely mount the bracket to the thermostat with

the 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 the screws.

Scale Plate

All adjustments must be made with the scale plate

removed. Complete adjustments before installing the

scale plate. (See the Adjustments section.)
1. Remove the gauge tap’s rubber cap.
2. Slide the scale plate under the setpoint indicator.
3 Insert the retaining pins (two supplied), twisting

to lock into place.

4. Reinstall the gauge tap’s rubber cap.

Setpoint Options

If the setpoint indicator is not needed, simply snip

off the indicator with a wire cutter. Limit or lock the

range of the setpoint by installing setpoint stops

(HFO-0027) in the slider track.

Cover

Covers are available in two styles:

Window-insert covers include a symbol-coded

label strip (HPO-1320) for setpoint indication.

Apply the label in the recessed area underneath

the window.

Blank covers require the removal of the setpoint

thumb adjuster. Insert a small screwdriver in the

slot between the thumb adjuster and the cam and

pry apart. Discard the adjuster.

To install a cover:
1. Ensure the thermostat is mounted securely and

the gauge tap cap and accessories are installed.

2. Slide the cover over the base.
3. Using a 1/16" hex wrench, turn both cover

mounting screws on the thermostat base CCW

(outward) until the cover is secured. (See the

illustration in the Adjustments section.)

Electrical Box Mounting

1. Attach the desired HMO-50xx backplate to the

box with the two 6-32 screws supplied.

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

6-20 x 2" screws supplied with the thermostat.

Mounting 1

Location 1

Electrical Box Mounting 1

Hollow Wall Mounting 1

Scale Plate

1

Setpoint Options

1

Cover 1

Connections 2
Adjustments 2

Calibration 2

Throttling Range

2

Maintenance 2
Important Notices 2
Additional Resources

2

Hollow Wall Mounting

NOTE: Thermostats may be mounted on hollow

walls up to 5/8" with the HMO-5023 kit.

CTC-1621/1622 Back

HMO-50xx

This manual is related to the following products: