When the SOFT STOP AMPS THRE S H OLD is being applied, a sta tus message
‘‘SHUTDOWN IN PROGRESS, COMPRESSOR UNLOADING’’ is shown.
Chilled Water Recycle Mode
The machine may cycle off and wait until the load incr eas e s to restart again when t he
compressor is running in a lightly loaded condi ti on. This cycling of the ch ill er is normal and is
known as recycle. A recycle shutdown is initiated when any of the following conditions are true:
• when in LCW control, the dif ference between the
LEAVING CHILLED WATER
tem-
perature and
ENTERING CHILLED W ATER
temperature i s less than the
RECYCLE
SHUTDOWN DELTA T
(found in the SERVICE 1 t able) and the
LEAVING CHILLED
WATER TEMP
is below the
CONTROL POINT
, and the
CONTROL POINT
has not
increased in the last 5 minu tes
• when
ECW CONTROL OPTION
is enabled, the differ en ce between the
ENTERING
CHILLED WATER
temperature and the
LEAVING CHILLED WATER
temperature is
less than the
RECYCLE SHUTDOWN DEL TA T
(found in the SERVICE 1 ta ble ) and
the
ENTERING CHILLED WATER TEMPERATURE
is below the
CONTROL POINT
,
and the
CONTROL PO INT
has not increased in the last 5 minutes
• when the
LEAVING CHILLED WATER
temperature is wit hin 3° F (2° C) of the
BRINE
REFRIG TRIPPOINT
When the machine is in RECYCLE mode, the chil led water pump relay r emains energized so
that the chilled water temperature can be monitored for increasing load. The recycle control
uses
RECYCLE RESTART DELT A T
to check when the compressor should be restarted. This