Unit Trip Volts; Table 12 - Program Key Limits And Default - York YCWL0056SE Installation Operation & Maintenance

FORM 201.26-NM1
ISSUE DATE: 1/19/2018

Unit Trip Volts

For total chiller high current trip programming on
460VAC chillers:
• Add the sum of all of 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 12 - 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
(NOT APPLICABLE TO A YCWL)
FAN DIFFERENTIAL OFF PRESSURE
(NOT APPLICABLE TO A YCWL)
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. ID 0-7 is selectable.
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
I D
= X
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
137
7