Daikin EWYQ080DAYN, Руководство по установке

Страница: 17 / 20

EWYQ080~250DAYN
Packaged air-cooled water chillers
4PW35559-1D – 03.2011 Installation manual
13
Example 2: Single ring system with separate pumps
Figure 2 shows the system configuration, field wiring and terminals
for field wiring of this example.
Purpose
Purpose of this system is to deliver a constant water flow at a
constant temperature to a particular load. One unit, slave 3 (S3), is
kept as a standby unit.
Setup
■
The system is controlled on entering water temperature.
■
Pump 1, pump 2 and pump 3 keep running as long as the
master unit, slave 1 or slave 2 are ON. Pump 4 only starts
running if slave 3 is switched ON. After switching OFF the units,
the pumps run for a time indicated by the
PUMPLAG
setting.
■
Slave 3 (S3) is configured to operate when its remote start/stop
switch S1S (S3) is pushed by the operator.
■
Slave 1 (S1), slave 2 (S2) and the master unit (M) are switched
ON or OFF using the remote start/stop switch S1S (M) which is
connected to the master unit.
■
The setpoint can be switched from
INLETSETP1
to
INLETSETP2
using the dual setpoint selection switch S2S
which is connected to the master unit.
Parameter settings of the units
Usersettings menu, submenu
DICN
Changeable inputs/outputs must be defined as follows:
Service setting menu, submenu
INPUT OUTPUT
Remark
Slave 3 can be configured to start up automatically if:
■
1 of the other units is in alarm or;
■
all other units are running on full capacity and the setpoint is not
reached yet.
To have your slave 3 unit act this way, set its mode to
STANDBY
. In
this case, S1S (S3) has no function.
Example 3: Double ring system with several pumps
Figure 3 shows the system configuration, field wiring and terminals
for field wiring of this example.
Purpose
Purpose of this system is to keep a buffer at a constant temperature
and to feed a load from this buffer. One unit, slave 3 (S3), is kept as a
standby unit.
Setup
■
The system is controlled on entering water temperature.
■
The pumps of the slave units only run when their compressor is
running (energy saving). After stopping the compressor, the
pump runs for a time indicated by the
PUMPLAG
setting.
■
The pump of the master unit must run continuously so as to
sense the correct temperature.
■
Slave 3 (S3) is configured to operate when its remote start/stop
switch S1S (S3) is pushed by the operator.
■
Slave 1 (S1), slave 2 (S2) and the master unit (M) are switched
ON or OFF using the remote start/stop switch S1S (M) which is
connected to the master unit.
■
The setpoint can be switched from
INLETSETP1
to
INLETSETP2
using the dual setpoint selection switch S2S
which is connected to the master unit.
Parameter settings of the units
Usersettings menu, submenu
DICN
:
Changeable inputs/outputs must be defined as follows:
Service setting menu, submenu
INPUT OUTPUT
Remark
Slave 3 can be configured to start up automatically if:
■
1 of the other units is in alarm or;
■
all other units are running on full capacity and the setpoint is not
reached yet.
To have your slave 3 unit act this way, set its mode to
STANDBY
. In
this case, S1S (S3) has no function.
NOTE K*P can also be a 24 V DC or 230 V AC contactor.
Slave 3 Slave 2 Slave 1 Master
MODE
:
DISCONNECT
ON/OFF
NORMAL NORMAL NORMAL
PUMP ON IF: UNIT ON UNIT ON UNIT ON UNIT ON
Slave 3 Slave 2 Slave 1 Master
Terminal 46-47
S2S DI1
NONE NONE NONE
DUAL
SETPOINT
Terminal 48-49
S1S DI2
REMOTE
ON/OFF
NONE NONE
REMOTE
ON/OFF
Terminal 50-51
DI3
NONE NONE NONE NONE
Terminal 52-53
DI4
NONE NONE NONE NONE
NOTE K*P can also be a 24 V DC or 230 V AC contactor.
Slave 3 Slave 2 Slave 1 Master
MODE
:
DISCONNECT
ON/OFF
NORMAL NORMAL NORMAL
PUMP ON IF: COMPR ON COMPR ON COMPR ON COMPR ON
Slave 3 Slave 2 Slave 1 Master
Terminal 46-47
S2S DI1
NONE NONE NONE
DUAL
SETPOINT
Terminal 48-49
S1S DI2
REMOTE
ON/OFF
NONE NONE
REMOTE
ON/OFF
Terminal 50-51
DI3
NONE NONE NONE NONE
Terminal 52-53
DI4
NONE NONE NONE NONE