Carrier 16JT Series Start Up & Operation Manual

Carrier 16JT Series Start Up & Operation Manual Manual pdf 24 page image

valve actuator) in the MAN. (MANUAL) mode. Pressthe 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 tenthsof 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 LOWRDISP button will allow the following values to be shownin either MAN. or AUTO. in the lower display: the setpoint (SP); the deviation between the actual and set pointtemperatures; and the OUT control signal in percent ofrange. A flashing code indicates a wiring fault or miss-ing configuration.NOTE: For the following procedure, the up arrow (∂)and the down arrow (ƒ) are used to increase or de-crease the set point, output, and set-up configuration val-ues, respectively. To quickly make large changes to setpoint or manual control output values, press the arrowindicative 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 directionof 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 actualtemperature on the middle display in order to open thecapacity control valve signal.c. Press the chiller START button. The capacity control valveshould open to a mid-open position (soft start) for thetime period set on adjustable time delay relay 62T3, typi-cally about 15 minutes. The valve limit position can bevaried by adjusting the high limit setting knob under thecover of the current limiter (see Fig. 17 or Fig. 18).3. After completion of the 62T3 soft-start time period, placethe controller in the MANUAL mode by pressing theAUTO.-MAN. button until MAN. is displayed. Use thearrows to verify that the capacity control valve will openand close in proportion to the output signal (OUT) overits entire range. ‘‘OUT’’ is displayed as 0.0 to 100.0% ofthe 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, andwait briefly to allow the OUT signal to stabilize. Thenuse the up arrow to change the set point several degreesabove the actual temperature to verify that the controlvalve OUT signal will gradually change towards the closedposition. Next, use the down arrow to change the setpoint several degrees below the actual temperature toverify that the control valve output signal will graduallychange towards the open position.5. Use the arrows to reset the set point temperature at thedesired 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, thenunblock water flow switches. Also, remove jumper wirefrom terminals P1 and P21 and any other jumpers whichmight have been connected for controls checkout.Table 4 — Standard Controller ConfigurationsSET UP FUNCTION SELECTIONTUNING PROP BDRATE MINRSET RPMLOCKOUT10.00.001.00+ CONFSET POINT RAMP SP RAMP DISABLAUTOTUNE AT ENABLAT ERRORDISABLNONEALGORITHM CONT ALGINPUT 2OUT ALGPID ADISABLCURRNTINPUT 1 DECIMALUNITSIN 1 TYPEIN 1 HIIN 1 LOBIAS IN 1FILTER 1BURNOUTPWR FREQXXX.XDEG F100 LO300.00.00.010NONE60 HZCONTROL PID SETSSP SOURCRATIOBIASPOWER UPSP HILIMSP LOLIMACTIONOUTHILIMOUTLOLIMDROPOFFFAILSALEPBorGAINMINorRPM1 ONLY1LOCAL1.00.0A LSP100.041.0DIRECT100.00.05.00.0PB PCTRPMOPTIONS AUX OUTREM SWDISABLNONECOM ComSTATE DISABLALARMS A1S1VALA1S1TYPEA1S2TYPEA2S1TYPEA2S2TYPEA1S1 H LAL HYST40.5*PV*NONENONENONELO*2.0**Used for low chilled water temperature cutout.NOTE: Controller configuration selections not listed here have beenautomatically deleted from the controller set-up display by the aboveconfiguration selections. Selections which have been changed fromoriginal default values are underlined.Fig. 21 — Operator Interface24