Unit Trip Volts; Program Key Limits And Default; Table 11 - Program Key Limits And Default - York YLAA0285SE Manual

FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020

Unit Trip Volts

For total chiller high current trip programming on
460VAC chillers:
• Add the sum of all the compressor and fan RLA's
in the chiller.
• Multiply the sum by 1.25
• Divide by 225A
• The resulting voltage is the value that should be
programmed.
For example, if fan and compressor RLA's total 180A:
5V x 180A
x 1.25 =
225A
The programmed value will be 5.0V.
TABLE 11 – PROGRAM KEY LIMITS AND DEFAULT
PROGRAM VALUE
DISCHARGE PRESSURE CUTOUT
SUCTION PRESSURE CUTOUT
LOW AMBIENT TEMP. CUTOUT
LEAVING CHILLED LIQUID
TEMP. CUTOUT
ANTI-RECYCLE TIMER
FAN CONTROL ON PRESSURE
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
1125VA
= 5.0V
225A
MODE
—
WATER COOLING
GLYCOL COOLING
STANDARD AMBIENT
LOW AMBIENT
WATER COOLING
GLYCOL COOLING
—
—
—
SINGLE SYSTEM
DUAL SYSTEM
CURRENT FEEDBACK
—
R E M O T E U N I T
P R O G R A M M E D
When communications is required with a BAS or
OptiView Panel, individual unit IDs are necessary for
communications with specific chillers on a single RS-
485 line. Remote Unit ID 0-7 are selectable.
LOW LIMIT HIGH LIMIT
325 PSIG 575 PSIG
22.4 BARG 39.6 BARG
80.0 PSIG 120.0 PSIG
5.52 BARG 8.27 BARG
42.0 PSIG 70.0 PSIG
2.9 BARG 4.83 BARG
25.0 °F 60.0 °F
-3.9 °C 15.6 °C
0 °F 60.0 °F
-17.8 °C 15.6 °C
—
-1.0 °F 36.0 °F
-18.3 °C 2.2 °C
300 SEC. 600 SEC.
360 PSIG 485 PSIG
24.8 BARG 33.4 BARG
80 PSID 160 PSID*
5.51 BARD 11.03 BARD*
2
4
2
0.5 Volts 4.5 Volts
0
SECTION 7 – UNIT CONTROLS
I D
= X
DEFAULT
570 PSIG
39.3 BARG
80.0 PSIG
5.52 BARG
44.0 PSIG
3.03 BARG
25.0 °F
-3.9 °C
25.0 °F
-3.9 °C
36 °F
—
2.2 °C
36.0 °F
2.2 °C
600 SEC.
385 PSIG
26.5 BARG
125 PSID
8.62 BARD
3 3
6 6
4 3
2.5 Volts
7 0
159
7