FORM 150.67-NM2 (209)
149
JOHNSON CONTROLS
7
Unit Trip Volts
For total chiller high current trip programming on
460VAC chillers:
• Add the sum of all the 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 =
1125VA
= 5.0V
225A 225A
The programmed value will be 5.0V.
R E M O T E U N I T I D
P R O G R A M M E D = X
TABLE 13 –
* 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.
PROGRAM VALUE
MODE
LOW LIMIT
HIGH LIMIT
DEFAULT
DISCHARGE PRESSURE CUTOUT
—
325 PSIG
575 PSIG
570 PSIG
22.4 BARG
39.6 BARG
39.3 BARG
SUCTION PRESSURE CUTOUT
WATER COOLING
80.0 PSIG
120.0 PSIG
80.0 PSIG
5.52 BARG
8.27 BARG
5.52 BARG
GLYCOL COOLING
42.0 PSIG
70.0 PSIG
44.0 PSIG
2.9 BARG
4.83 BARG
3.03 BARG
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
-1.0 °F
36.0 °F
36.0 °F
-18.3 °C
2.2 °C
2.2 °C
ANTI-RECYCLE TIMER —
300 SEC.
600 SEC.
600 SEC.
FAN CONTROL ON PRESSURE
—
360 PSIG
485 PSIG
385 PSIG
24.8 BARG
33.4 BARG
26.5 BARG
FAN DIFFERENTIAL OFF PRESSURE
—
80 PSID
160 PSID*
125 PSID
5.51 BARD
11.03 BARD*
8.62 BARD
TOTAL NUMBER OF COMPRESSORS
SINGLE
SYSTEM
2
3
3
DUAL
SYSTEM
4
6
6
NUMBER OF FANS PER SYSTEM
2 4
3
UNIT/SYSTEM TRIP VOLTS
CURRENT FEEDBACK
0.5 Volts
4.5 Volts
2.5 Volts
REMOTE UNIT ID
—
0
7
0
When communications is required with a BAS or
OptiView Panel, individual unit IDs are necessary for
communications with speci
fi
c chillers on a single RS-
485 line. ID 0-7 is selectable.
PROGRAM KEY LIMITS AND DEFAULT
Summary of Contents for YCAL0019
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Page 65: ...FORM 150 67 NM2 209 65 JOHNSON CONTROLS 5 5 CONNECTION WIRING DIAGRAM CON T LD12703B...
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