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Daikin EWWD360MBYN [11/24] Adjusting the temperature setpoint
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EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1B
Operation manual
10
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, the
other two are reserved for outlet control.
■
: inlet water temperature of evaporator, setpoint 1,
■
: inlet water temperature of evaporator, setpoint 2.
■
: outlet water temperature of evaporator, setpoint 1,
■
: outlet water temperature of evaporator, setpoint 2.
In heating operation, two setpoints are reserved for inlet control.
■
: inlet water temperature of condenser, setpoint 1,
■
: 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.
■
: inlet water temperature of evaporator, setpoint 1,
■
: inlet water temperature of evaporator, setpoint 2.
■
: inlet water temperature of condenser, setpoint 1,
■
: 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 11), none of the above-mentioned setpoints will be active.
To adjust a setpoint, proceed as follows:
1 Enter the setpoints menu. Refer to the chapter "How to enter a
menu" on page 8.
If the user password is disabled for setpoint modifications (refer
to the "User settings menu" on page 11), the controller will
immediately enter the setpoints menu.
If the user password is enabled for setpoint modifications, enter
the correct code using the h and g keys (refer to the "User
password menu" on page 13). 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 h and g 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. When the setting has been cancelled, the cursor
returns to the upper left corner of the screen.
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, circuit safeties and network safeties.
When a unit safety occurs, all compressors are shut down. The
safeties menu will indicate which safety is activated. The
screen of the readout menu will indicate
for all circuits. The red LED inside the p key lights up and
the buzzer inside the controller is activated.
When a circuit safety occurs, the compressor of the corresponding
circuit is shut down. The
screen of the readout menu
will indicate
for the circuit concerned. The
red LED inside the p key lights up and the buzzer inside the
controller is activated.
When a network safety occurs in a DICN configuration, the slaves not
detected by the network will function as stand alone units.
■ If the master is not detected by the network, all units will work as
stand alone units.
■ If a slave unit can not be found by the network, the red light
inside the p key of the master lights up and the buzzer inside
the control is activated.
■ If the master can not be found by the network, the red light
inside the p key of all the slaves light up and the buzzer inside
their controls are 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 circuit safety.
2 Find the cause of shutdown and correct.
Refer to "Listing activated safeties and checking the unit status"
on page 16 and the chapter "Troubleshooting" on page 17.
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.
If required, enter the
or the
. (Refer to the installation manual “Setting the
password for safety reset”.)
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 It will only be necessary to switch the o key on again if a unit
safety occurs.
NOTE
The customer is also allowed to define a setpoint in
function of an analog input.
NOTE
Refer to “Customization in the service menu” chapter
“Setting of the changeable inputs and outputs” in the
installation manual
default value
! "! #$!
limit values
(a)
(a) For glycol units the lower limit of the cooling temperature
setpoint can be adapted in the factory. The following
values apply:
: 5°C, 3°C, –2°C, –7°C
: 2°C, 0°C, –5°C, –10°C
"
-->
#! %
-->
&! '
-->
'$!
step value
$! $! $!
NOTE
When a setpoint on a unit in a DICN system is set, this
setpoint will be transferred to all other units.
NOTE
Also consult "Defining the schedule timer" on page 14
and "Defining the display settings" on page 14.
NOTE
To be able to reset the
circuit error
several precautions have to be taken. Refer to
“Resetting the
alarm” in the
installation manual.
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.
Содержание
- Operation manual 1
- Packaged water cooled water chillers 1
- Introduction 2
- Operation manual 2
- Technical specifications 2
- Electrical specifications 3
- Electrical specifications 3
- Gwp global warming potential 3
- Important information regarding the refrigerant used 3
- Periodical inspections for refrigerant leaks may be required depending on european or local legislation please contact your local dealer for more information 3
- Refrigerant type r134a 3
- This product contains fluorinated greenhouse gases covered by the kyoto protocol 3
- Value 1300 3
- Description 4
- Escription 4
- As the refrigerant circulates through the unit changes in its state or condition occur these changes are caused by the following main components 5
- Compressor the compressor m c acts as a pump and circulates the refrigerant in the refrigeration circuit it compresses the refri gerant vapour coming from the evaporator at the pressure at which it can easily be liquefied in the condenser 5
- Condenser the function of the condenser is to change the state of the refrigerant from gaseous to liquid the heat gained by the gas in the evaporator is discharged through the condenser to the ambient air and the vapour condenses to liquid 5
- Evaporator the main function of the evaporator is to take heat from the water that flows through it this is done by turning the liquid refrigerant coming from the condenser into gaseous refrigerant 5
- Expansion valve the liquid refrigerant coming from the condenser enters the evaporator via an expansion valve the expansion valve brings the liquid refrigerant to a pressure at which it can easily be evaporated in the evaporator 5
- Figure 5
- Filter drier the filter installed behind the condenser removes small particles from the refrigerant to prevent blockage of the tubes the drier takes water out of the system 5
- Flowswitch the flowswitch protects the evaporator of the unit against freezing when there is no waterflow or when the waterflow is too low 5
- Function of the main components 5
- Functional diagram 5
- Water in outlet connection the water inlet and outlet connection allow an easy connection of the unit to the water circuit of the air handling unit or industrial equipment 5
- Waterfilter the waterfilter protects the evaporator against clogging 5
- Internal wiring parts table 6
- Safety devices 6
- Before operation 7
- Checks before initial start up 7
- Efore operation 7
- Digital controller 8
- General recommendations 8
- Operation 8
- Peration 8
- Power supply connection and crankcase heating 8
- Water supply 8
- Connection to the unit 9
- How to enter a menu 9
- Setting the language 9
- Switching the unit off 9
- Switching the unit on 9
- Switching units on off in a dicn system 9
- Working with the unit 9
- Consulting actual operational information 10
- Selecting cooling or heating operation 10
- Adjusting the temperature setpoint 11
- Resetting the unit 11
- Advanced features of the digital controller 12
- All menus are directly accessible using the corresponding key on the digital controller the down arrow x on the display indicates that you can go to the next screen of the current menu using the h key the up arrow w on the display indicates that you can go to the previous screen of the current menu using the g key if c is displayed this indicates that you can either return to the previous screen or can go to the next screen 12
- Depending upon the settings in the user settings menu and on the selected cooling heating operation mode the setpoints menu can either be entered directly or by means of the user password 12
- Readout menu 12
- Setpoints menu 12
- The user settings menu protected by the user password allows a full customization of the units 12
- This chapter gives an overview and a brief functional description of the screens provided by the different menus in the following chapter you will find how you can set up and configure the unit using the various menu functions 12
- User settings menu 12
- Additionally the number of safeties that already occured can be consulted on the first line of the history screens 13
- Along with the basic information more detailed information screens can be consulted while the safety menu is active press the q key screens similar to the following will appear 13
- History menu 13
- Info menu 13
- Input output menu 13
- Safeties menu 13
- The history menu contains all the information concerning the latest shutdowns the structure of those menus is identical to the structure of the safeties menu whenever a failure is solved and the operator performs a reset the concerning data from the safeties menu is copied into the history menu 13
- The input output menu gives the status of all the digital inputs and the relay outputs of the unit 13
- The safeties menu provides useful information for trouble shooting purposes the following screens contain basic information 13
- Timers menu 13
- Cooling heating menu 14
- Defining and activating the control mode 14
- Entering the user settings menu 14
- Network menu 14
- User password menu 14
- Defining dual evaporator pump control 15
- Defining the capacity limitation settings 15
- Defining the display settings 15
- Defining the lead lag mode 15
- Defining the pump control settings 15
- Defining the schedule timer 15
- Defining the thermostat settings 15
- Activating or deactivating the setpoints password 16
- Checking the actual value of the software timers 16
- Defining bms control 16
- Defining the network settings 16
- Checking the safety info and the unit status after a reset 17
- Checking the status of the inputs and outputs 17
- Consulting additional unit information 17
- Listing activated safeties and checking the unit status 17
- Changing the user password 18
- Roubleshooting 18
- Troubleshooting 18
- Aintenance 21
- Disposal requirements 21
- Maintenance 21
- Maintenance activities 21
- Cooling inlet water temperature control of evaporator outlet water temperature control of evaporator 22
- Heating inlet water temperature control of condenser 22
- Schedule timer example 22
- Thermostat parameters 22
- Oftware structure 23
- Q q q q q 23
- Q q q q q q 23
- Pw22685 1b 24
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