Johnson Controls YEWS Series, Installation, Operation And Maintanance Instructions

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NO.
AI1
AI2
AI3
AI4
AI5
AI13
AI14
AI15
AI16
Analog input Measuring scope and status description
(5) Analog, digital, input/ouput definition
(a) Definition of analog input/ouput
Leaving condenser liquid
Leaving heat liquid(heat pump)
Enter condenser liquid
Enter heat liquid(heat pump)
Leaving evaporator liquid
Enter evaporator liquid
Discharge temperature
Evaporat pressure
Discharge pressure
Oil pressure
Compressor motor current
-19~99
℃
, fault once exceeding the scope
-19~99
℃
, fault once exceeding the scope
-19~99
℃
, fault once exceeding the scope
-19~99
℃
, fault once exceeding the scope
-29~149
℃
, fault once exceeding the scope
0.41~5.1 kg/cm2 Air conditioning/ice storage
0~20.69kg/cm2 water source heat pump
0~28kg/cm2, fault once exceeding the scope
0~28kg/cm2, fault once exceeding the scope
Fault of rated currency, disconnecting or short circuit
2
Instructions: Pressure units relation ships: 1 Kg/cm =98.07Kpa; All the pressure in this file means gauge pressure except
it is explained specially.
(b) Definition of digital input
Status description
Normal in close, disconnecting means fault
Open means air-conditioning/Close means ice storage
Open means air-conditioning /Close means heat pump
Normal in close, disconnecting means fault
Normal in close, disconnecting means fault
Normal in close, disconnecting means fault
Normal in close, disconnecting means fault
Normal in close, disconnecting means fault
Open means shutdown, close means startup
Switch input
Flow switch
AC/ITS switch
AC/HP switch
Discharge pressure switch
Oil level switch
Motor protection
Ext.interlock
Start fault
Remote
NO
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI8
Remark: When the manual control passage is set as remote in the centralized controller, the unit will startup and stop
according to the status of DI8 (remote switch), and DI8 open means shutdown, while startup in close.
YEWS-E Water Cooling Screw Chiller/Heat Pump
(c) Definition of digital output
No.
DO1
DO2
DO3
DO4
DO5
DO6
DO7
DO8
DO9
DO15
DO16
Output
Pump
Motor Y contact
Motor
△
contact
Oil heater
Bypass valve1
Alarm
Valve liquid injection
Bypass vaive2
Run status
Cr4
Cr3
Status description
Always opened, close in output
Always opened, close in output
Always opened, close in output
Always opened, close in output
Always closed, open in output
Always opened, close in output
Always closed, open in output
Always closed, open in output
Always closed, open in output
Always closed, open in output
Always
in output opened, close
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