Install Instructions

ManualsBrandsKMC Controls ManualsDampersPneumatic VAV Reset Volume Controller - Reverse Acting, Paper Label Dial, NC w/ Bracket

KMC Controls, Inc.

19476 Industrial Drive

New Paris, IN 46553

574.831.5250

www.kmccontrols.com; info@kmccontrols.com

BEIGE Controllers (Direct Acting)

1. Check that there is 0 psi at the “T” Port.

2. Use a ow hood or “tee” a Magnehelic

(or equiv-

alent) dierential pressure gauge between the

controller and the ∆P pick-up.

3. The “LO” ow seing limit (center knob) must

be set rst. Temporarily adjust the thermostat

for a branch pressure lower than the 8 psig reset

start point (minimum cooling); typically 6 psig or

less is best. Removing the thermostat branch line

would be another acceptable method. Adjust the

“LO” knob (center knob) clockwise to increase or

counterclockwise to decrease ∆P limit. Normally

one-half turn will cause a 0.1 ∆P change. Allow

for reaction time. Depending on actuator size and

position, timing will vary. To position an actua-

tor/damper from closed to open may take several

minutes.

NOTE: If the “LO” ow seing limit must be set at

“0” (zero minimum), do not turn the “LO”

knob fully counterclockwise. The knob will

adjust three to four full turns aer a zero

minimum is reached. Turning the “LO”

knob fully counterclockwise will result in

a negative reset condition. This means that

when the controller is beginning to reset

at 8 psig from the thermostat, it must rst

overcome the negative adjustment and will

not begin to reset until a higher thermostat

reset pressure is reached. This negative

reset will also reduce the eective range

of the controller by reducing the high end

and narrowing the reset span. If a zero

minimum is required, adjust the “LO” knob

until the controller just begins to crack the

damper open, then back-o one-fourth turn

and verify zero airow.

4. The “HI” ow seing limit (outer knob) must be

set aer the “LO”. Temporarily adjust the ther-

mostat for a branch pressure higher than the 13

psig reset stop point (maximum cooling); typically

17 psig or greater is best. Removing the thermo-

stat branch line and teeing-in to the main air line

would be another acceptable method. Adjust the

“HI” knob (outer knob) clockwise to increase or

counterclockwise to decrease ∆P limit. Nominally

one-half turn will cause a 0.1 ∆P change. Allow for

reaction time.

5. Recheck the “LO” and the “HI” seings at least

twice, verify seings, and ne tune each time if

necessary. This procedure will remove internal

component tensions and conrm seings.

6. Reconnect the thermostat branch line if necessary,

and adjust the thermostat to the desired room tem-

perature setpoint.

NOTE

: The “HI” adjustment limits the travel of

the reset mechanism. Therefore, the reset

span will be less than 5 psig, the upper limit

being less than 13 psig.

NOTE

: Always make adjustments in the same

plane/orientation as the one in which the

unit will operate.

More Information

For additional specications of particular models,

see the CSC-2000 Data Sheet (hp://bit.ly/PWVwol).

For principles of operation, troubleshooting, and

sample applications, see the CSC-2000 Applications

Guide (hp://bit.ly/RAWIzn).

Maintenance

No routine maintenance is required. Each compo-

nent is designed and manufactured for reliability

and performance. Careful installation and use will

ensure long-term dependability.

CAUTION

Pneumatic devices must be supplied with clean,

dry control air. Any other medium (e.g., oil

or moisture contamination) will result in the

device’s eventual failure.

(Scan QR code

to download

Applications

Guide.)