KMC Controls CSP-5002 - Manual (Page 6)

CSP-5001/5002 VAV Flow Controller-Actuators 6 Applications Guide, Rev. B
Controller Calibration
Minimum and Maximum Flow Limits
Minimum and maximum flow limits are often set
at the CTE-5100 series thermostat (see the CTE-5100
Series Thermostat Reference section). If desired, the
minimum and maximum limits can be defined by
adjusting the appropriate setpoints within the CSP-
5001/5002 controller (see below) instead, but do not
try to set the limits at BOTH the controller and the
thermostat (or else the limits will not reflect either
the controller’s or the thermostat’s limits).
To set the velocity limits at the CSP:
1. Remove the access door by pulling back on the
door’s tab and lifting upward.
2. Connect a voltmeter to the meter taps (using
HSO-5001 test leads).
3. Move the jumper from the NOR (normal) position
(two left-most pins) to the MIN position (two
right-most pins).
4. Adjust the MIN potentiometer for the desired
minimum voltage.
NOTE: MIN must be adjusted first.
5. Move the jumper to the MAX position (two center
pins).
6. Adjust the MAX potentiometer to the desired
maximum voltage.
7. Return the jumper to the NOR position.
VNOM (CFM) Range Setting
The CSP range is factory-calibrated with the
VNOM potentiometer centered. Using any SSS-
1002/1003/1004/1005 series velocity pickup, tubing,
and reducers, the CSP will have a range of 0–3,300
fpm with a 0–10 volt DC reset control signal.
Leaving the VNOM at the factory setting is recom-
mended! Changing the VNOM potentiometer from
the factory setting will alter the calibration between
the “IN” and “OUT” voltages. However, the VNOM
can be adjusted to match 0–10 volts to a specific ve-
locity range if desired.
NOTE: In the controller, VNOM stands for
“NOMinal Volumetric flow rate.”
To set the VNOM range to a different range than
the factory default (a new curve):
1. Remove the access door by pulling back on the
door’s tab and lifting upward.
2. Supply the desired high end of range velocity to
the “H” and “L” ports.
3. Connect a voltmeter between the “OUT” and “–”
terminals and adjust the VNOM potentiometer
until the voltage equals 10 volts DC.
To return the VNOM range to the factory default
range of 0–3300 fpm as illustrated in the chart on
page 3:
1. Remove the access door by pulling back on the
door’s tab and lifting upward.
2. Supply or simulate a 3300 ft/min velocity (or 0.5"
delta P) at the “H” and “L” ports.
3. Connect a voltmeter between the “OUT” and “–”
terminals and adjust the VNOM potentiometer
until the voltage equals 10 volts DC.
OR
2. Measure the velocity of the airflow measured by
the “H” and “L” ports.
3. Connect a voltmeter between the “OUT” and “–”
terminals and adjust the VNOM potentiometer
until the voltage at the meter equals the
corresponding voltage from the chart on page
3. The higher the flow, the more accurate the
adjustment.