Operation manual
13
EWWP045~06 ECB1~3MUW
Packaged water-cooled water chillers
4PW30041-1A
2
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 evaporator:
•
M1: OUTLWATER
: actual outlet water temperature of module 1.
•
M2: OUTLWATER
: actual outlet water temperature of module 2.
•
M3: OUTLWATER
: actual outlet water temperature of module 3.
3
Press the
h
key to enter the next screen of the readout menu.
The
COMPRESSOR STATUS
screen of the readout menu provides
information concerning the status of the different compressors.
•
C11
: actual status of compressor 1 of module 1.
•
C12
: actual status of compressor 2 of module 1.
•
C21
: actual status of compressor 1 of module 2.
•
C22
: actual status of compressor 2 of module 2.
•
C31
: actual status of compressor 1 of module 3.
•
C32
: actual status of compressor 2 of module 3.
When a circuit is OFF, the following status information may
appear.
•
SAFETY ACTIVE
: one of the circuit safety devices is activated
(refer to the chapter
).
•
(LIMIT)
: the circuit is limited by a remote contact.
•
TIMERS BUSY
: the actual value of one of the software timers is
not zero (refer to the
•
CAN STARTUP:
the circuit is ready to start up when extra
cooling load is needed.
The 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
SAFETY ACTIVE
.
4
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.
Selecting cooling or heating operation
The "cooling/heating" menu allows the user to set the unit in cooling
or heating operation.
The
COOL/HEAT
menu provides information concerning the selected
operation mode.
■
COOLING (EVAP)
: cooling mode. The two setpoints for inlet
water temperature control of the evaporator can be used.
■
HEATING (COND)
: heating mode. The two setpoints for inlet
water temperature control of the condenser can be used.
To define cooling/heating operation, proceed as follows:
1
Enter the cooling/heating menu through the main menu. (Refer
to the chapter
2
Position the cursor behind
MODE
using the
q
key.
3
Select the appropriate setting using the
g
and
h
keys.
4
Press
q
to confirm.
The cursor returns to the upper left corner of the screen.
Adjusting the temperature setpoint
The unit provides definition and selection of four or two independent
temperature setpoints.
In cooling operation, two setpoints are reserved for inlet control of the
evaporator.
■
INLSETP 1 E
: inlet water temperature of evaporator, setpoint 1,
■
INLSETP2 E
: inlet water temperature of evaporator, setpoint 2.
In heating operation, two setpoints are reserved for inlet control of the
condenser.
■
INLSETP 1 C
: inlet water temperature of condenser, setpoint 1,
■
INLSETP 2 C
: inlet water temperature of condenser, setpoint 2.
In double thermostat operation, two setpoints are reserved for inlet
control of the evaporator and two others are reserved for inlet control
of the condenser.
■
INLSETP 1 E
: inlet water temperature of evaporator, setpoint 1,
■
INLSETP2 E
: inlet water temperature of evaporator, setpoint 2.
■
INLSETP 1 C
: inlet water temperature of condenser, setpoint 1,
■
INLSETP 2 C
: inlet water temperature of condenser, setpoint 2.
The selection between setpoint 1 and 2 is done by a remote dual
setpoint switch (to be installed by the customer). The actual active
setpoint can be consulted in the readout menu.
If the manual control mode is selected (refer to
), none of the above-mentioned setpoints will be active.
To adjust a setpoint, proceed as follows:
1
Enter the setpoints menu through the main menu. (Refer to the
chapter
If the user password is disabled for setpoint modifications (refer
to the
"User settings menu" on page 14
immediately enter the setpoints menu.
If the user password is enabled for setpoint modifications, enter
the correct code using the
g
and
h
keys. (Refer to the
). Press
q
to confirm the password
and to enter the setpoints menu.
2
Select the setpoint to be adjusted using the
q
key.
A setpoint is selected when the cursor is blinking behind the
setpoint's name.
The "
>
" sign indicates the actual active temperature setpoint.
3
Press the
g
and
h
keys to adjust the temperature setting.
The default, limit and step values for the cooling (evaporator)
and heating (condenser) temperature setpoints are:
4
Press
q
to save the adjusted temperature setpoint.
When the setting has been confirmed, the cursor switches to the
next setpoint.
5
To adjust other setpoints, repeat from instruction 2 onwards.
Resetting the unit
The units are equipped with three kinds of safety devices: unit
safeties, module safeties and network safeties.
When a unit safety occurs, all compressors are shut down. The
safeties menu will indicate which safety is activated. The
COMPRESSOR
STATUS
screen of the readout menu will indicate
OFF - SAFETY ACTIVE
for all circuits. The red LED inside the
p
key lights up and the buzzer
inside the controller is activated.
When a module safety occurs, the compressors of the corresponding
module are shut down. The
COMPRESSOR STATUS
screen of the
readout menu will indicate
OFF - SAFETY ACTIVE
for the module
concerned. The red LED inside the
p
key lights up and the buzzer
inside the controller is activated.
If the unit has been shut down due to a power failure, it will carry out
an autoreset and restart automatically when the electrical power is
restored.
IIIIN
N
N
NL
L
L
LS
S
S
SE
E
E
ET
T
T
TP
P
P
P IIIIN
N
N
N E
E
E
E
IIIIN
N
N
NL
L
L
LS
S
S
SE
E
E
ET
T
T
TP
P
P
P IIIIN
N
N
N C
C
C
C
default value
12°C
30°C
limit values
(a)
(a) For glycol units the lower limit of the cooling temperature setpoint can be
adapted in the factory. The following values apply:
INLSETP IN E/C
: 5°C, 3°C, –2°C, –7°C
8
-->
23°C
15
-->
50°C
step value
0.1°C
0.1°C
NOTE
Also consult
