Operation manual
9
EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1
Consulting actual operational information
1
Enter the readout menu. Refer to the chapter
The controller automatically shows the first screen of the
readout menu which provides the following information:
•
or
or
: manual/
automatic control mode operation. If the automatic control
mode is selected, the controller will indicate the active
temperature setpoint. Depending on the status of the remote
contact, setpoint one or setpoint two is active.
•
: actual inlet water temperature.
•
:
actual outlet water temperature
(EWWD40~100) or mixed outlet water temperature
(EWWD120~200).
•
: actual condensor inlet water temperature.
2
Press the
h
key to enter the next screen of the readout menu.
This screen is only available for double circuit units.
This screen of the readout menu provides the following
information on the evaporator:
•
: actual outlet water temperature of circuit 1.
•
: actual outlet water temperature of circuit 2.
3
Press the
h
key to enter the next screen of the readout menu.
This screen of the readout menu provides the following
information on the condenser:
•
or
: manual/automatic control
mode operation. If the automatic control mode is selected,
the controller will indicate the active temperature setpoint.
Depending on the status of the remote contact, setpoint one
or setpoint two is active.
•
: actual inlet water temperature.
4
Press the
h
key to enter the next screen of the readout menu.
The
screen of the readout menu provides
information concerning the status of the different circuits.
•
: actual status of circuit 1.
•
: actual status of circuit 2.
When the circuit is ON, the following status information may
appear.
•
: 40% - this percentage refers to the activated capacity of
that specific circuit.
When a circuit is OFF, the following status information may
appear.
•
: one of the circuit safety devices is
activated (refer to the chapter
•
: the circuit is limited by a remote contact.
•
: the actual value of one of the software timers
is not zero (refer to the
•
the circuit is ready to start up when extra
cooling load is needed.
The four preceding OFF messages are written down in order of
priority. If one of the timers is busy and one of the safeties is
active, the status information says
.
The
is the percentage indication of the actual
cooling or heating capacity of the unit.
5
Press the
h
key to enter the next screen of the readout menu.
The
screen of the readout menu provides
information concerning the pressures of the first circuit.
■
: high pressure of the refrigerant in circuit
1,
respectively circuit
2. The first number stands for the
pressure in bar, the second number stands for the saturation
temperature in degrees Celsius.
■
: low pressure of the refrigerant in circuit
1,
respectively circuit
2. The first number stands for the
pressure in bar, the second number stands for the saturation
temperature in degrees Celsius.
6
Press the
h
key to enter the next screen of the readout menu.
(Only for EWWD360~540.)
The
screen of the readout menu provides
information concerning the pressures of the second circuit.
7
Press the
h
key to enter the next screen of the readout menu.
This menu is available if voltage and current transmitters are
installed. This readout menu provides information concerning
the voltage and the compressor current.
8
Press the
h
key to enter the next screen of the readout menu.
To consult actual operational information about the total running
hours of the compressors.
9
Press the
g
key to return to the other readout menus.
Selecting cooling or heating operation
The "cooling/heating" menu allows the user to set the unit in cooling,
heating or double thermostat operation.
The
menu provides information concerning the
selected operation mode.
■
: cooling mode. The two setpoints for both
inlet water temperature control of evaporator and outlet water
temperature control of evaporator can be used.
■
: heating mode. The two setpoints for inlet
water temperature control of condenser can be used.
■
: double thermostat mode. The two
setpoints for both inlet water temperature control of
evaporator and of condenser can be used.
If double thermostat is selected, a load-up of thermostat steps is
performed in case the evaporator and the condenser inlet water
thermostat indicate a load-up. A load-down of thermostat steps is
performed in case the evaporator or the condenser inlet water
thermostat indicate a load-down.
To define cooling/heating operation, proceed as follows:
1
Enter the cooling/heating menu.
If the controller is already in the cooling/heating menu, position
the cursor in the upper left corner of the actual screen using the
q
key.
2
Position the cursor behind
using the
q
key.
3
Select the appropriate setting using the
h
and
g
keys.
4
Press
q
to confirm the selection.
The cursor returns to the upper left corner of the screen.
NOTE
For a DICN system, the
,
values are the values of the individual units, not
of the system. Temperatures of the system can be
consulted in the first screen of the network menu.
NOTE
When a circuit in is in a high pressure setback, the
indication of capacity will be flashing. A high pressure
setback is a prevention of load-up or a forced load-
down caused by a too high pressure.
NOTE
When "cooling", "heating" or "double thermostat" is
selected on a unit in a DICN system, this mode is
transferred to all other units.
