KMC Controls CCC-1002 - Manual (Page 3)

CCC-1001/1002 (Dual Input Receiver Controllers) 3 Installation Guide
Setpoint Calibration
Initial setpoint calibration is done after the spring
tube on the back of the controller has been properly
connected and secured and the throttling range and
authority adjustments have been set and locked.
1. Make the following connections:
A. Main air supply (20 psi) to MAIN.
B. Branch (output) gauge to Port B.
C. For SINGLE input operation, connect
pressure to Port 1 equal to the desired
setpoint, OR for DUAL input operation,
connect pressures to Ports 1 and 3 that
correspond to the reset schedule at
approximately midrange.
D. If the remote setpoint adjustment is to
be used, connect pressure to Port 2 that
corresponds to zero offset.
E. Unused inputs are left unconnected.
2. Turn the setpoint adjustment screw to obtain an
output equal to the midrange pressure of the
controlled device.
A. If in the DA mode and branch pressure
is high, turn the setpoint screw CW; if
branch pressure is low, turn the setpoint
screw CCW.
B. If in the RA mode and branch pressure
is high, turn the setpoint screw CCW; if
branch pressure is low, turn the setpoint
screw CW.
After the system is live, minor adjustments to the
setpoint calibration can easily be done if the setpoint
offset is known. Each complete clockwise rotation, of
the screw, is equivalent to a 1.75 psi increase in Port
1 pressure. To increase the setpoint, turn the adjust-
ment screw CW; to decrease the setpoint, turn the
adjusment screw CCW. The number of turns equals:
Setpoint Offset (° F)
Port 1 Primary Input Span
(° F)
x
Port 1 Primary Input Span (psi)
1.75
Example: Port 1 is connected to a temperature
transmitter with a range of 40 to 240° F
(200° F span) and an output of 3 to 15 psi
(12 psi span). The desired control point is
7° F higher than the actual control point.
Then, the number of turns = (7°)/(200°)
x (12 psi)/1.75 = 0.24. Thus, the set point
adjustment screw should be turned 1/4 of a
turn CW.
Remote Setpoint Adjustment
An input pressure change of 3 to 15 psi to Port 2 will
change the setpoint 20% of the span of the primary
transmitter. The effect of the change is direct in
nature. An increase in Port 2 pressure from 9 to 15
psi increases the setpoint 10% and a decrease in Port
2 pressure from 9 to 3 psi decreases the setpoint 10%.
Example: If the Port 1 transmitter has a range of 40
to 240° F (200° F span), then the remote
setpoint adjustment pressure on Port 2 can
change the setpoint +/– 20° F or a total of
40° F or 20% of the Port 1 primary input
span.
Maintenance
No routine maintenance is required. Each compo-
nent is designed and manufactured for reliability
and performance. Careful installation will ensure
long term dependability.
Accessories
External restrictor HFO-0022 (Restrictor T, 28.8 scim)
might be required if replacing a receiver/controller
using internal restrictors. All transmitters used with
the CCC-1001/1002 require an external restrictor.
For other pneumatic accessories, such as connectors,
tubing, fittings, filters, and gauges, see the Com-
pressed Air Accessories section in the Electronic and
Pneumatic Controls Condensed Catalog (SP-071).