Completion - Carrier 16JT Series Start Up & Operation Manual

valve actuator) in the MAN. (MANUAL) mode. Press
the MAN./AUTO. button to switch between the two modes.
The actual output value is not important at this time. (Pref-
erably, the temperatures have been configured for dis-
play [and processing] with the decimal located for tenths
of a degree, but that is not critical.)
The red bars on the right of the temperature display in-
dicate deviation between actual and set point tempera-
tures in ±10% increments of the sensor span. The LOWR
DISP button will allow the following values to be shown
in either MAN. or AUTO. in the lower display: the set
point (SP); the deviation between the actual and set point
temperatures; and the OUT control signal in percent of
range. A flashing code indicates a wiring fault or miss-
ing configuration.
NOTE: For the following procedure, the up arrow ( )
and the down arrow ( ) are used to increase or de-
crease the set point, output, and set-up configuration val-
ues, respectively. To quickly make large changes to set
point or manual control output values, press the arrow
indicative of the direction of change, then press the op-
posite arrow to move the adjustment one digit to the left.
To move the adjustment an additional digit to the left,
continue pressing the arrow indicative of the direction
of change, and then press the opposite arrow again.
2a. Place the controller in the AUTOMATIC mode by press-
ing the AUTO./MAN. button until A is displayed.
b. Use the arrows to change the temperature set point (SP)
on the lower display to a few degrees below the actual
temperature on the middle display in order to open the
capacity control valve signal.
c. Press the chiller START button. The capacity control valve
should open to a mid-open position (soft start) for the
time period set on adjustable time delay relay 62T3, typi-
cally about 15 minutes. The valve limit position can be
varied by adjusting the high limit setting knob under the
cover of the current limiter (see Fig. 17 or Fig. 18).
3. After completion of the 62T3 soft-start time period, place
the controller in the MANUAL mode by pressing the
AUTO.-MAN. button until MAN. is displayed. Use the
arrows to verify that the capacity control valve will open
and close in proportion to the output signal (OUT) over
its entire range. ''OUT'' is displayed as 0.0 to 100.0% of
the 4 to 20 mA output control signal.
4a. Return the controller to the AUTOMATIC mode by press-
ing the AUTO.-MAN. button until A is displayed.
b. Use the arrows to change the temperature set point (SP)
close to the actual temperature on the upper display, and
wait briefly to allow the OUT signal to stabilize. Then
use the up arrow to change the set point several degrees
above the actual temperature to verify that the control
valve OUT signal will gradually change towards the closed
position. Next, use the down arrow to change the set
point several degrees below the actual temperature to
verify that the control valve output signal will gradually
change towards the open position.
5. Use the arrows to reset the set point temperature at the
desired chilled water control temperature for normal op-
eration. Leave the controller in the A (AUTO.) mode.
Completion —
Replace fuses from starters for condens-
ing water pump motor and chilled water pump motor, then
unblock water flow switches. Also, remove jumper wire
from terminals P1 and P21 and any other jumpers which
might have been connected for controls checkout.
Fig. 21 — Operator Interface
Table 4 — Standard Controller Configurations
SET UP
TUNING
SET POINT RAMP
AUTOTUNE
ALGORITHM
INPUT 1
CONTROL
OPTIONS
COM
ALARMS
*Used for low chilled water temperature cutout.
NOTE: Controller configuration selections not listed here have been
automatically deleted from the controller set-up display by the above
configuration selections. Selections which have been changed from
original default values are underlined.
24
FUNCTION SELECTION
PROP BD 10.0
RATE MIN 0.00
RSET RPM 1.00
LOCKOUT + CONF
SP RAMP DISABL
AT ENABL DISABL
AT ERROR NONE
CONT ALG PID A
INPUT 2 DISABL
OUT ALG CURRNT
DECIMAL XXX.X
UNITS DEG F
IN 1 TYPE 100 LO
IN 1 HI 300.0
IN 1 LO 0.0
BIAS IN 1 0.0
FILTER 1 10
BURNOUT NONE
PWR FREQ 60 HZ
PID SETS 1 ONLY
SP SOURC 1LOCAL
RATIO 1.0
BIAS 0.0
POWER UP A LSP
SP HILIM 100.0
SP LOLIM 41.0
ACTION DIRECT
OUTHILIM 100.0
OUTLOLIM 0.0
DROPOFF 5.0
FAILSALE 0.0
PBorGAIN PB PCT
MINorRPM RPM
AUX OUT DISABL
REM SW NONE
ComSTATE DISABL
A1S1VAL 40.5*
A1S1TYPE PV*
A1S2TYPE NONE
A2S1TYPE NONE
A2S2TYPE NONE
A1S1 H L LO*
AL HYST 2.0*