Daikin EWWQ049KAW1M, Руководство по эксплуатации

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EWWQ049~06 ECB2+3MUBW
Packaged water-cooled water chillers
D-EOMHP01008-17EU
Operation manual
8
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
"Main menu" on page 9 .)
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 "User settings menu"
on page 9 ), 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
"Main menu" on page 9 ).
If the user password is disabled for setpoint modifications (refer
to the
"User settings menu" on page 9 ), the controller will
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 "User
password menu" on page 10 ). 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.
To reset the unit, proceed as follows:
1 Press the p key to acknowledge the alarm.
The buzzer is deactivated.
The controller automatically switches to the corresponding
screen of the safeties menu: unit safety or module safety.
2 Find the cause of shutdown and correct.
Refer to "Listing activated safeties and checking the unit status"
on page 12 and the chapter "Troubleshooting" on page 14 .
When a safety can be reset, the LED under the p key starts
blinking.
3 Press the p key to reset the safeties that are no longer active.
Once all safety devices are disactivated and reset, the LED
under the
p key goes out. If one of the safeties is still active, the
LED under the p key goes on again. In this case, return to
instruction 2.
4 If a unit safety occurred or if all modules were shut down due to
module safeties, switch on the unit using the
o key.
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 "Defining the schedule timer" on page 12 .
If the user shuts down the power supply in order to repair a
safety, the safety will automatically be reset after power-up.
NOTE The history information, i.e. the number of times a unit
safety or a circuit safety occurred and the unit status at
the moment of shutdown, can be checked by means of
the history menu.