22
SLS/SLH 10/06
11
NIGHT MANAGEMENT
(or LOW NOISE OPTION)
The parameter is defined at the Service level: “Night
Mode”. If set to SI, the DPSET is modified as follows:
DPSET night=DPSET+DPOFFSET from PM hours to AM
hours
Where:DPOFFSET = parameter in bars at Service Level.
It is the correction of the pressure target of the conden-
sation control with speed controller.
PM and AM = parameters that ca be set with a mask
with the CLOCK key, if enabled:
PM = night mode start
AM = night mode end
MAX FAN SPEED IN COOLING IN NIGHT MODE:
MaxFanSpeed is no longer a fixed parameter, but is a
function of B4, air temperature
The analogue output value AO, is always between the
Min Fan Speed and the Max Fan Speed. Whenever
one of the two high pressure measures by the transducer
reaches the MDP Value, soon the fan must run at max
speed, until that high pressure value falls again to the
90% of the Max High Pressure Value.
12
COMPRESSORS CAPACITY
CONTROL
Parameters used: Disch Pressure Limit, (HI) Max Disch
Pressure.(MDP).
If high pressure transducer are installed and if the unit is
a 2 compressors unit, the compressors capacity control
is active.
If, at any time while the compressor is full loaded the
high pressure value reaches the setted Disch Pressure
Limit default value 24.5 bar, the compressor loaded is
soon unloaded.
The compressor loaded of the system will be allowed to
run only when High Pressure value falls below the Max
Discharge Pressure default value 23.5 bar.
Summary of Contents for SLS-SLH
Page 1: ...Chiller unit SLS SLH...
