ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
10
Defining and activating the control mode
The unit is equipped with a thermostat which controls the capacity of
the unit.
Two different control modes exist:
■
Manual control mode: the operator controls the capacity
himself -
•
0
(air flow in manual mode): off, low, medium or high.
•
(capacity step in manual mode): 0%, 30%~100%.
■
Thermostat mode: uses the thermostat control to control the
capacity of the unit -
Defining the thermostat settings
When automatic control mode is selected, the unit uses a thermostat
function to control the cooling capacity. However, the thermostat
parameters are not fixed and can be modified via the
$
screen of the user settings menu.
The default, limit and step values for the thermostat parameters are
shown in
Defining the capacity limitation settings
A capacity limitation can be activated:
■
:
•
see
"Defining the schedule timer" on
•
when a changeable input is configured as
capacity limitation.
•
: to activate capacity limitation 1.
•
: the capacity limitation is not active.
■
2!
: capacity limitation value of circuit 1 in
case of capacity limitation 1/2/3/4.
Defining the flow control settings
The
screen of the user settings menu allows the user
to define the pump-leadtime and pump-lagtime.
■
: used to define the time that the fan or pump-
motor must run before the unit starts.
■
: used to define the time that the fan or
pumpmotor keeps running after the unit is stopped.
Defining the schedule timer
To activate the screens of the schedule timer or holiday period, these
first need to be enabled by changing their setting to
in the appropriate
screen. To de-activate the schedule timer or holiday period, their setting
needs to be reset to
. (See
The
screen of the user settings menu allows the
user to define the schedule timer settings.
Each day of the week can be appointed to a group. The actions defined
in a group will be executed in each day belonging to that group.
■
,
,
,
,
,
and
: used to define to which
group each day of the week belongs (
/
/
/
2
/
!
).
■
For each of the four groups up to nine actions can be set, each
with their respective timing. Actions include: putting the unit on/
off and setting capacity limitation.
■
Beside these four groups there is also a holiday period group
which is set the same way as the other groups. Up to 12 holiday
periods can be entered in the
screen. During these
periods the schedule timer will follow the settings of the holiday
period group.
Defining dual evaporator fan/pump control
The
$
screen of the user settings menu allows the
user to define the steering of 2 evaporator fans/pumps (for this to be
possible a changeable digital output has to be configured for a
second evaporator fan/pump in the service menu). Refer to the
installation manual.
■
: used to define which kind of control will be used for the
two evaporator pumps. When automatic rotation is chosen the
offset on running hours also has to be entered.
•
: pump 1 and pump 2 will alternate to the offset on RH.
•
: pump 1 will always start up first.
•
: pump 2 will always start up first.
■
: 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.
Defining the floating setpoint settings
The
screen of the user settings menu allows
the active setpoint to be modified in function of the ambient. The
source and settings of the floating setpoint can be configured by the
user.
■
: used to define the mode of the floating setpoint.
•
: floating setpoint is not activated.
•
: floating setpoint is altered based on the ambient
temperature.
■
.$
: used to define maximum value that can be added
to the active setpoint.
■
: used to define the ambient (source) at which the floating
setpoint value is equal to zero.
■
: used to define the rise in floating setpoint value for 10°C
drop in ambient.
Defining the display settings
The
screens of the usersettings menu allows
the user to define the choice of language, time and date.
■
: used to define the language of the displayed
information of the controller (on the first screen). (Push the
q
button repeatedly to change the operating language).
■
: used to define the present time (on the second screen).
■
: used to define the present date (on the second screen).
NOTE
To activate manual control mode, select
as
present mode. To deactivate the manual control mode,
select
as present mode.
NOTE
■
If changed on one of the units in a DICN
configuration, this setting is transferred to all other
units in the network.
■
A functional diagram showing the thermostat
parameters can be found in
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 schedule timer
working can be found in
NOTE
The unit always works with "last command". This means
that the last command given, whether manually by the
user or by the schedule timer, is always executed.
Examples of command that can be given are switching
the unit on/off or changing a setpoint.
NOTE
A functional diagram showing the floating setpoint
working can be found in
