York MILLENNIUM YCAL0043SC, Manual

Page: 73 / 133

YORK INTERNATIONAL
73
FORM 150.62-NM2
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 dis-
played will be the longer of the two timers, start-to-start
or stop-to-start.
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
36, 37, and 38, 39.
The Fan Differential Off Pressure is the programmed
differencial 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 36, 37 and 38, 39.
The TOTAL NUMBER OF COMPRESSORS are the
amount of compressors in the chiller, and determines
the stages of cooling available. Notice in Table 29 her
the chiller is a single or dual refrigerant circuit.
This must be programmed correctly to
assure proper chiller operation.
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
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
FA 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
TABLE 26 – PROGRAM KEY LIMITS AND DEFAULTS
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
SUCTION PRESSURE CUTOUT
WATER COOLING
44.0 PSIG 70.0 PSIG 44.0 PSIG
3.03 BARS 4.83 BARS 3.03 BARS
GLYCOL COOLING
20.0 PSIG 70.0 PSIG 44.0 PSIG
1.38 BARS 4.83 BARS 3.03 BAR
LOW AMBIENT TEMP.CUTOUT
STANDARD AMBIENT
25.0°F 60.0°F 25.0°F
-3.9°C 15.6°C -3.9°C
LOW AMBIENT
0°F 60.0°F 25.0°F
-17.8°C 15.6°C -3.9°C
LEAVING CHILLED LIQUID
WATER COOLING — —
36°F
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 DIFFERENCIAL 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
2