Table 14 - Program Key Limits And Default - York YCAL0019 Installation, Operation And Maintenance Manual

FORM 150.67-NM1
ISSUE DATE: 4/28/2017
PROGRAM KEY
There are several operating parameters under the PRO-
GRAM key that are programmable. These setpoints can
be changed by pressing the PROGRAM key, and then
the ENTER/ADV key to enter Program Mode. Continu-
ing to press the ENTER/ADV key will display each op-
erating parameter. While a particular parameter is being
displayed, the ↑ (UP) and ↓ (DOWN) arrow keys can be
used to change the value. After the value is changed, the
ENTER/ADV key must be pressed to enter the data into
memory. Table 15 shows the programmable limits and
default values for each operating parameter.
Following are the displays for the programmable val-
ues in the order they appear:
D I S C H A R G E
d
C U T O U T =
DISCHARGE PRESSURE CUTOUT is the discharge
pressure at which the system will shutdown as moni-

TABLE 14 - PROGRAM KEY LIMITS AND DEFAULT

PROGRAM VALUE
DISCHARGE PRESSURE CUTOUT
SUCTION PRESSURE CUTOUT
LOW AMBIENT TEMPERATURE
CUTOUT
LEAVING CHILLED LIQUID
TEMPERATURE CUTOUT
ANTI-RECYCLE TIMER
FAN CONTROL ON PRESSURE
(NOT APPLICABLE TO A YCRL)
FAN DIFFERENTIAL OFF PRESSURE
TOTAL NUMBER OF COMPRESSORS
NUMBER OF FANS PER SYSTEM
UNIT/SYSTEM TRIP VOLTS
REMOTE UNIT ID
* The minimum discharge pressure allowed is 235 PSIG. The Fan Differential Off Pressure High Limit will be lowered (reduced) to
prevent going below 235 PSIG based on where the fan control On Pressure is programmed.
JOHNSON CONTROLS
P R E S S U R E
3 9 5 P S I G
MODE
—
WATER COOLING
GLYCOL COOLING
STANDARD AMBIENT
LOW AMBIENT
WATER COOLING
GLYCOL COOLING
—
—
—
SINGLE SYSTEM
DUAL SYSTEM
CURRENT FEEDBACK
—
tored by the optional discharge transducer. This is a
software shutdown that acts as a backup for the me-
chanical high pressure switch located in the refrigerant
circuit. The system can restart when the discharge pres-
sure drops 40 PSIG (2.76 barg) below the cutout point.
If the optional discharge pressure transducer is not in-
stalled, this programmable safety would not apply. It
should be noted that every system has a mechanical
high pressure cutout that protects against excessive
high discharge pressure regardless of whether or not
the optional discharge pressure is installed.
S U C T I O N
C U T O U T =
The SUCTION PRESSURE CUTOUT protects the
chiller from an evaporator freeze-up. If the suction
pressure drops below the cutout point, the system will
shut down. Typically, the cutout should be set to 80
PSIG (5.52 Bars) form water cooling.
LOW LIMIT
325 PSIG
22.4 BARG
80.0 PSIG
5.52 BARG
42.0 PSIG
2.9 BARG
25.0 °F
-3.9 °C
0 °F
-17.8 °C
—
-1.0 °F
-18.3 °C
300 SEC.
360 PSIG
24.8 BARG
80 PSID
5.51 BARD
2
4
2
0.5 VOLTS
0
SECTION 7 – UNIT CONTROLS
P R E S S U R E
80 . 0 P S I G
HIGH LIMIT DEFAULT
575 PSIG 570 PSIG
39.6 BARG 39.3 BARG
120.0 PSIG 80.0 PSIG
8.27 BARG 5.52 BARG
70.0 PSIG 44.0 PSIG
4.83 BARG 3.03 BARG
60.0 °F 25.0 °F
15.6 °C -3.9 °C
60.0 °F 25.0 °F
15.6 °C -3.9 °C
36 °F
—
2.2 °C
36.0 °F 36.0 °F
2.2 °C 2.2 °C
600 SEC. 600 SEC.
485 PSIG 385 PSIG
33.4 BARG 26.5 BARG
160 PSID 125 PSID
11.03 BARD* 8.62 BARD
3 3
6 6
4 3
4.5 VOLTS 2.5 VOLTS
7 0
173
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