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Daikin EWWD360MBYN [22/24] Cooling inlet water temperature control of evaporator outlet water temperature control of evaporator
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Operation manual
21
EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1B
ANNEX I
Thermostat parameters
Cooling inlet water temperature control of evaporator/outlet
water temperature control of evaporator
The figure below shows the thermostat diagram.
The default value and the upper and lower limits of the thermostat
parameters are listed in the table below.
Heating inlet water temperature control of condenser
The figure below shows the thermostat diagram.
The default value and the upper and lower limits of the thermostat
parameters are listed in the table below.
■ If the temperature is below the setpoint, the thermostat control
will check every LOADDOWN TIMER.
According to the deviation to the setpoint, no action, slow load
down (=–3%) or fast load down (=–7%) is required.
■ If the temperature is above the setpoint, the thermostat control
will check every LOADUP TIMER.
According to the deviation to the setpoint, no action,
slow load
up (=+3%) or fast load up (=+7%) is required.
ANNEX II
Schedule timer example
To come to the schedule above following settings have to be made:
All days assigned to the same group will work according to the set-
tings of this group.
In this example setting:
■ all Mondays, Tuesdays, Thursdays and Fridays will work accord-
ing to the settings in group 1 (
),
■ all Wednesdays will work according to the settings in group 2
(
),
■ all Saturdays and Sundays will work according to the settings in
group 3 (
#
),
■ all holiday days will work according to the settings in the holiday
group (
).
All group settings of groups
,
,
#
,
%
and
work similar as
following example (settings for group 1):
INLET CONTROL Default value Lower limit Upper limit
Step difference - a
(K)
0.8
(a)
(a) can only be modified in the service menu
––
Step difference - b
(K)
0.5
(a)
––
Steplength - c
(K)
0.2
(a)
––
Loadup timer
(sec)
48 12 300
Loaddown timer
(sec)
24 12 300
Setpoint
(°C)
12.0 7.0 23.0
OUTLET CONTROL Default value Lower limit Upper limit
Step difference - a
(K)
0.8
(a)
(a) can only be modified in the service menu
––
Step difference - b
(K)
0.5
(a)
––
Steplength - c
(K)
0.2
(a)
––
Loadup timer
(sec)
12 12 300
Loaddown timer
(sec)
12 12 300
Setpoint
(°C)
7.0 4.0 16.0
INLET CONTROL Default value Lower limit Upper limit
Step difference - a
(K)
0.8
(a)
(a) can only be modified in the service menu
––
Step difference - b
(K)
0.5
(a)
––
Steplength - c
(K)
0.2
(a)
––
Loadup timer
(sec)
48 12 300
Loaddown timer
(sec)
24 12 300
Setpoint
(°C)
30 15 50
c b c c b c
a/2 a/2
Setpoint
Fast load up
Slow load up
No action
Slow load down
Fast load down
c b c c b c
a/2 a/2
Setpoint
Fast load up
Slow load up
No action
Slow load down
Fast load down
MARCH
MON TUE WED THU FRI SAT SUN
1 G1 2 G1 3 G2 4 G1 5 G1 6 G3 7 G3
8 G1 9 G1 10 G2 11 G1 12 G1 13 G3 14 G3
15 G1 16 G1 17 G2 18 G1 19 G1 20 G3 21 G3
22 G1
23 H 24 H 25 H 26 H 27 H 28 H
29 H 30 G1 31 G2
Screen 1
Screen 2
()
#
#
() $ $#
$#$# ,$#
$$$$$ $$$$
$#$$$$ $$$$
14.0°C
68 1213 15 18 20
12.0°C
Cooling inlet setpoint 1
On
Off
time (h)
() $ $#
$&1$$ $
$&1$$ $$$
#$/1$$ %$
() $% $&
%1$$ $$$
'#1$$ $$$
&$1$$ $$$
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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