Operation manual
15
EWAQ080~260DAYN
Packaged air-cooled water chillers
4PW35556-1E
Submenu: Compressor
Defining the lead-lag settings
In the
COMPR.LEAD-LAG
screen select the appropriate mode and
define the compressor lead-lag settings.
■
MODE
•
AUTO
: the priority is depending on the running hours of the
separate compressors.
•
PRIORITY
:
C11>C12>C21>C22
the setting in this example
C11 has the highest priority to startup while C22 has the lowest
priority.
Defining the capacity limitation settings
In the
COMPR.CAP.LIMIT
screen up to 4 possible capacity
limitation settings can be configured.
A capacity limitation can be activated:
■
MODE
:
•
NOT ACTIVE
: the capacity limitation is not active.
•
CHANG.DIG.INP.:
when a changeable input is configured as
capacity limitation.
•
LIMIT 25%
/
50%
/
75%
/
SET
: to activate capacity limitation.
■
in case of
CHANG.DIG.INP.
or
LIMIT SET
mode, each
compressor must be defined (
C11
/
12
/
21
/
22
).
■
OFF
: These compressors will always be switched off
■
ON
: These compressors will still be used by the thermostat
according to the required load.
Submenu: Fan
Defining the fan low noise settings
The
FAN LOW NOISE
screen is only available when the option
inverter fans is installed (OPIF). Refer to the manual delivered with
the option.
Fan forced on settings
Allow to run the fans even when the unit is switched off.
■
OFF
: the fans will not be activated.
■
ON
: the fans will be forced to run.
■
CH.DIG.INP.
: the fans will run, depending on the settings of
the changeable digital input.
Submenu: Pump
Defining the pump control settings
The
PUMPCONTROL
screen of the usersettings menu allows the user
to define the pump-leadtime and pump-lagtime.
■
PUMPLEADTIME
: used to define the time that the pump must
run before the unit (or the compressor in case
PUMP ON IF:
COMPR ON
is selected in a DICN configuration) can start up.
■
PUMPLAGTIME
: used to define the time that the pump keeps
running after the unit (or the compressor in case
PUMP ON IF:
COMPR ON
is selected in a DICN configuration) has been
stopped.
■
DAILY ON
: select either
Y
(yes) or
N
(no). When
Y
is selected,
define the starting time (24 hour time scale).
This means that during that time, the pump will run for about
5 seconds, even when the unit is switched off.
Defining dual pump control
The
DUAL PUMP
screen of the usersettings menu allows the user to
define the steering of two pumps (for this to be possible a changeable
digital output has to be configured for a second pump in the service
menu). Refer to the installation manual.
■
MODE
: used to define which kind of control will be used for the
two pumps. When automatic rotation is chosen the offset on
running hours also has to be entered.
•
AUTO ROTATION
: pump 1 and pump 2 will alternate to the
offset on RH.
•
PUMP 1>PUMP 2
: pump 1 will always start up first.
•
PUMP 2>PUMP 1
: pump 2 will always start up first.
■
OFFSET ON RH
: used to define the offset in running hours
between the two pumps. Used to switch over between pumps
when they work in automatic rotation mode.
Submenu: Floating setpoint
Defining the floating setpoint settings
Setpoint signal is renamed as "floating setpoint based on changeable
analogue input".
The
FLOATING SETPOINT
screen of the usersettings menu allows
the active setpoint to be modified in function of the ambient
temperature. The source and settings of the floating setpoint can be
configured by the user.
■
MODE
: used to define the mode of the floating setpoint.
•
NOT ACTIVE
: floating setpoint is not activated.
•
AMBIENT
: floating setpoint is based on the ambient temperature
and altered accordingly.
Settings:
MAXPOS
,
NEG
,
RF
or
SLOPE
.
•
CH. AI SLOPE NTC
: floating setpoint is based on the
changeable analogue input (NTC type) and altered accordingly.
Settings:
MAXPOS
,
NEG
,
RF
or
SLOPE
.
•
CH. AI SLOPE V-A
: floating setpoint is based on the
changeable analogue input (V-A type) and altered accordingly.
Settings:
MAXPOS
,
NEG
,
RF
or
SLOPE
.
•
CH.AI MAX VALUE
: floating setpoint is based on the
changeable analogue input (V-A type) and altered accordingly.
Setting:
MAXIMUM VALUE
.
NOTE
To activate manual control mode, select
MANUAL
CONTROL
as present mode. To deactivate the manual
control mode, select an other mode as present mode.
For units in a DICN configuration:
When changing the control mode on one of the units, it
is automatically transferred to all other units.
Manual control mode however can only be selected on
units with status
DISCONNECT ON/OFF
.
NOTE
The OUTLET mode is not available for DICN systems.
NOTE
Refer to "Customization in the service menu",
chapter "Setting of the changeable digital
inputs and outputs" in the installation manual.
NOTE
A functional diagram showing the floating setpoint
working can be found in
"Annex II" on page 26
.
