York YVAA Installation Operation & Maintenance page 143

Air-cooled screw liquid chillers, air-cooled screw liquid chillers with variable speed drive
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Form 201.47-ICOM1
Issue date: 17/11/2022
Table 26 - Setup mode programmable values (cont'd)
Unit setup mode
setting
Minimum Running
Speed
Quick Start VSD Start
Frequency
Sys 1 Motor Sensor To
Ignore
Sys 2 Motor Sensor To
Ignore
Sys 1 VI Differential
Temp Setpoint
Sys 2 VI Differential
Temp Setpoint
VI Deadband
VI Differential Temp
Setpoint Offset
Sys 1 Maximum Fan
Speed
Sys 2 Maximum Fan
Speed
Sys 1 Min Discharge
Suction Diff
Sys 2 Min Discharge
Suction Diff
Free Cooling Control
Remote Evaporator
Optimized Enhanced
Condenser Type
Sys 1 Evaporator Level
Control Setpoint
Sys 2 Evaporator Level
Control Setpoint
Evaporator Level
Control Valve Startup
Position
Evaporator Level Con-
trol Startup Delay
JOHNSON CONTROLS
Mode to change
Minimum
Any
Any
Any
Any
Any
30.0 °F (16.7 °C)
Any
30.0 °F (16.7 °C)
Any
2.0 °F (1.1 °C)
Any
2.0 °F (1.1 °C)
Any
Any
Any
(1.72 bard)
Any
(1.72 bard)
Unit Switch is Off
Free Cooling is
Disabled
Fans
Free Cooling is
disabled
Any
Any
Any
Any
Maximum
50 Hz
100 Hz
50 Hz
100 Hz
None
Temp sensor T1
Temp sensor T2
Temp sensor T3
None
Temp sensor T1
Temp sensor T2
Temp sensor T3
90.0 °F (50.0 °C)
90.0 °F (50.0 °C)
10.0 °F (5.5 °C)
40.0 °F (22.2 °C)
50 %
100 %
50 %
100 %
25 psid
300 psid
(20.69 bard)
25 psid
300 psid
(20.69 bard)
Choices:
Disabled
Open loop
Closed loop
Disabled / Enabled
Disabled
Microchannel or round tube
20.0%
80.0%
20.0%
80.0%
5%
95%
0 min
10 min
SECTION 8 - MICROPANEL
Default
50 Hz
100 Hz
None
None
73.0 °F (40.6 °C)
73.0 °F (40.6 °C)
4.0 °F (2.2 °C)
20.0 °F (11.1 °C)
100 %
100 %
85 psid
(5.86 bard)
85 psid
(5.86 bard)
Disabled (must be set
to disabled for correct
YVAA operation)
Disabled
Disabled
Microchannel
50.0%
50.0%
30%
3 min
143
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