York YCAL0080SC, YCAL0014SC manual Program Key Limits And Defaults

FORM 150.62-NM1

Another anti-recycle timer is started each time the sys- tems number one compressor cycles off. This anti-re- cycle time is fixed at 120 seconds and starts to count- down when the systems number one compressor cycles off.

The anti-recycle message is displayed when the sys- tem is unable to start due to either of the anti-recycle timers being active (counting down). The actual time displayed will be the longer of the two timers, start-to- start or stop-to-start.

F A N C O N T R O L O N

P R E S S U R E = X X X P S I G

The Fan Control On Pressure is the programmed pres- sure value that is used to stage the condenser fans on, in relation to discharge pressure. Refer to Condenser Fan Control in the UNIT OPERATION section and Tables 38, 39, and 40, 41.

TABLE 29 – PROGRAM KEY LIMITS AND DEFAULTS

F A N D I F F E R E N T I A L O F F P R E S S U R E = X X X P S I G

The Fan Differential Off Pressure is the programmed differential pressure value that is used to stage the con- denser fans off, in relation to discharge pressure. Refer to Condenser Fan Control in the UNIT OPERATION section and Tables 38, 39 and 40, 41.

T O T A L N U M B E R O F

C O M P R E S S O R S = 6

The TOTAL NUMBER OF COMPRESSORS are the amount of compressors in the chiller, and determines the stages of cooling available. Notice in Table 29 the chiller is a single or dual refrigerant circuit.

This must be programmed correctly to assure proper chiller operation.

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PROGRAM VALUE	MODEL	LOW LIMIT	HIGH LIMIT	DEFAULT
DISCHARGE PRESSURE CUTOUT	—	200 PSIG	399 PSIG	395 PSIG
		13.8 BARS	27.5 BARS	27.2 BARS
	WATER COOLING	44.0 PSIG	70.0 PSIG	44.0 PSIG
		3.03 BARS	4.83 BARS	3.03 BARS
SUCTION PRESSURE CUTOUT
	GLYCOL COOLING	20.0 PSIG	70.0 PSIG	44.0 PSIG
		1.38 BARS	4.83 BARS	3.03 BAR
	STANDARD AMBIENT	25.0°F	60.0°F	25.0°F
		-3.9°C	15.6°C	-3.9°C
LOW AMBIENT TEMP. CUTOUT
	LOW AMBIENT	0°F	60.0°F	25.0°F
		-17.8°C	15.6°C	-3.9°C
	WATER COOLING	—	—	36°F
LEAVING CHILLED LIQUID				2.2°C
TEMP. CUTOUT	GLYCOL COOLING	8.0°F	36.0°F	36.0°F
		-13.3°C	2.2°C	2.2°C
ANTI-RECYCLE TIMER	—	300 SEC.	600 SEC.	600 SEC.
FAN CONTROL ON-PRESSURE	—	225 PSIG	300 PSIG	230 PSIG
		15.5 BARS	20.7 BARS	15.9 BARS
FAN DIFFERENTIAL OFF-PRESSURE	—	50 PSIG	150 PSIG	80 PSIG
		3.45 BARS	10.3 BARS	5.52 BARS
TOTAL NUMBER OF COMPRESSORS	SINGLE SYSTEM	2	3	3
	TWO SYSTEMS	4	6	6

YORK INTERNATIONAL 79