JOHNSON CONTROLS
124
FORM 150.66-NM1 (708)
Unit Controls
TABLE 16 – PROGRAM KEY LIMITS AND DEFAULTS
*
The minimum discharge pressure allowed is 160 PSIG. The fan differential Off Pressure will be lowered to prevent going below 160
PSIG based on where the fan control On Pressure is programmed.
PROGRAM VALUE
MODE
LOW LIMIT
HIGH LIMIT
DEFAULT
DISCHARGE PRESSURE CUTOUT
—
200 PSIG
399 PSIG
395 PSIG
13.8 BARG
27.5 BARG
27.2 BARG
SUCTION PRESSURE CUTOUT
WATER COOLING
44.0 PSIG
70.0 PSIG
44.0 PSIG
3.03
BARG
4.83 BARG
3.03 BARG
GLYCOL COOLING
20.0 PSIG
70.0 PSIG
44.0 PSIG
1.38
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
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
260 PSIG
240 PSIG
15.5 BARG
17.9 BARG
16.5 BARG
FAN DIFFERENTIAL OFF PRESSURE
—
50 PSIG
100 PSID*
80 PSID
3.45 BARG
6.89 BARG*
5.52 BARG
TOTAL NUMBER OF COMPRESSORS SINGLE
SYSTEM
2
3
3
TWO SYSTEMS 4
6
6
NUMBER OF FANS PER SYSTEM
YCAL0090
–
3 4
3
YCAL0124 ONLY
CURRENT
FEEDBACK
UNIT/SYSTEM TRIP VOLTS
OPTION ENABLED
0.5
4.5
2
ONE PER UNIT
REMOTE UNIT ID
—
0
7
0
SYSTEM 1 SUPERHEAT SETPOINT EEV
10.0°F 15.0°F
12.0°F
5.5°C
8.3°C 6.6°C
SYSTEM 2 SUPERHEAT SETPOINT
EEV
10.0°F 15.0°F
12.0°F
5.5°C
8.3°C 6.6°C