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
