7.4 Setpoint and Cut-out Settings
Refer to Operating Limitations in ICOM (035-21170-100) when setting or adjusting Setpoint and Cut-out
Settings.
1-30
Form 201.26.OI1(11/09)
Parameter Type Low Limit High Limit Default
Water Cooling
(2)
4.4°C 21.1°C 6.7°C
Glycol Cooling -7.2°C 21.1°C 6.7°C
Low Temp Glycol Cooling -13.3°C 21.1°C 6.7°C
Leaving Liquid 'RANGE' Water/Glycol 0.8°C 1.4°C 1.1°C
Maximum EMS-PWM Remote Temperature Reset Water/Glycol 1.0°C 22.0°C 11.0°C
(1) Contact Johnson Controls for application guidelines before exceeding 12.8°C 'SETPOINT'.
(2) Leaving Chilled Liquid 'SETPOINT' should not be set below 5°C for water cooling.
Leaving Liquid 'SETPOINT'
(1)
Leaving Liquid SETPOINTS and Programmable Limits and Defaults
Parameter Type Low Limit High Limit Default YCWL
YLAE
YLAA
Discharge Pressure Cutout Water/Glycol 22.4 barg 39.6 barg 38.6 barg 33.8 barg 38.0 barg
Water Cooling 5.52 barg 8.27 barg 6.00 barg 5.52 barg 5.59 barg
Glycol Cooling 2.90 barg 8.27 barg 6.00 barg Note (2) Note (2)
Low Ambient Temperature Cut-out
Water/Glycol -17.8°C 15.6°C -3.9°C -17.8°C Note (4)
Water Cooling 3.0°C 3.0°C 3.0°C
Glycol Cooling -13.1°C 3.0°C 3.0°C Note (2) Note (2)
Low Temp Glycol Cooling -18.3°C 3.0°C 3.0°C Note (2) Note (2)
Anti-Recycle Timer Water/Glycol 240 s 600 s 600 s 600 600
Fan Control On-Pressure
YLAA/YLAE units only
Water/Glycol 20.0 barg 33.4 barg 23.0 barg 23.1 barg
Fan Differential Off-Pressure
(1)
YLAA/YLAE units only
Water/Glycol 3.7 barg 11.0 barg 5.5 barg 5.5 barg
Total Number Of Compressors Water/Glycol 4 6 6 Note (3) Note (3)
Unit ID Water/Glycol 0 7 0 0 0
System 1 Number of Fans
YLAA/YLAE units only
Water/Glycol 2 4 3 Note (5)
System 2 Number of Fans
YLAA/YLAE units only
Water/Glycol 2 4 3 Note (5)
Rate Sensitivity Water/Glycol 1.0°C 8.0°C 1.7°C 1.7°C 1.7°C
Rate Control Temperature Water/Glycol 1.0°C 11.0°C 6.1°C 6.1°C 6.1°C
1 Day 30 Days 14 Days 14
(1) The minimum discharge pressure allowed with any fans running is approximately16.6 barg.
i.e. Fan Control On Pressure - Fan Differential Off Pressure is not lower than approximately 16.6 BARG
The Discharge Fan Differential Off Pressure high limit is lowered to prevent going below approximately 16.6 barg
based on where the Discharge Fan Control On Pressure is programmed.
(2) Programmed on site to match glycol concentration and site requirements
(3) Programmed to match number of compressors
(4) YLAE set to -17.8°C. YLAA standard unit -3.9°C, low ambient unit -17.8°C
(5) Programmed to match number of fans.
Duty/Standby Pump Change Over - Dual Pump Hydro Kit Option
Factory Setting
Suction Pressure Cutout
Leaving Chilled Liquid
Temperature Cut-out
Cut-outs Programmable Limits, Defaults and Factory Settings
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