Installation and operation manual
26
EWWD440~850AAYNNO**
Packaged water-cooled water chillers
4PW25558-1B
Unit start flow
When “REMOTE” is selected in the graphic panel display “OPERATION” screen, the remote signal affects the unit to start.
When “LOCAL” is selected, it is the <Chiller ON> button on the switch box door that makes the unit start.
3
2
2
1
1
3
3
88WCX
88WCX
88WEX
Operation request
Unit water pump operation
command ON
During stop due
to low load
YES
NO
YES
YES
NO
NO
YES
“UNITS TO
CONTROL” is set to
“2UNITS”
Compressor to start
first is under ON-OFF
limiting
Opening 1+
opening 2=0%
Cooling water pump operation
command ON (Hot water pump
operation command ON)
YES
NO
Pump interlock ON
YES
Compressor to start first
operation ON
This is an item to be set with
control panel
YES
NO
YES
NO
NO
YES
Selected
motor under ON-OFF
limiting
Selected
compressor Opening
=0%
Cooling water pump operation
command ON (Hot water pump
operation command ON)
Pump interlock ON
Selected compressor
operation ON
Selected compressor opens up to
limited opening
Units control
thermo ON
Compressor to start
first only opens to
limited opening
NO
YES
NO
Back-up model is
under ON-OFF limiting
YES
NO
YES
Back-up model
opening 0%
Back-up model operation ON
Back-up model only to limited
opening