16
SLS/SLH 10/06
3
COMPRESSORS LEAVING
LIQUID CONTROL
(COOLING MODE)
If Leaving Control mode is selected, the leaving mixed
water temperature LWT will be controlled between the
setpoint and the se Neutral Band. The SetPoint
High Limit is the Setpoint plus the Neutral Band. The
SetPoint Low Limit is the Setpoint.
If the mixed leaving water temperature LWT is above
the SetPoint High Limit, the compressors will be ener-
gized one by one separated by the Time between Start
and Start different compressors.
If the LWT falls below the SetPoint High Limit and
greater than the SetPoint Low Limit, temp is in the
Neutral Band. No actions is occurring. No load and no
unloading.
If the LWT falls below the SetPoint one compressor is
switched off. Until the LWT is below the Setpoint, com-
pressors are unloaded according to the Unload time
parameter value.
4
COMPRESSORS LEAVING
LIQUID CONTROL
(HEATING MODE)
If leaving Control mode is selected, the leaving mixed
water temperature LWT will be controlled between the
setpoint and the setpoint - Neutral Band. The SetPoint
High Limit is the Setpoint. The SetPoint Low Limit is the
Setpoint – Neutral Band.
If the mixed leaving water temperature LWT is below the
SetPoint Low Limit, the compressors will be energized
one by one separated by the Time between Start and
Start different compressors.
If the LWT is between the SetPoint Low Limit and the
SetPoint High Limit, temp is in the Neutral Band. No
actions is occurring. No load and no unloading.
If the LWT is above the SetPoint High Limit one compres-
sor is switched off. Until the LWT is above the Setpoint
High Limit, compressors are unloaded according to the
Unload time parameter value.
