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Daikin EWWQ440AJYNN/A [71/130] Exv pre opening

Daikin EWWQC14AJYNN [71/130] Exv pre opening

ESIE07-05 Functional Control

Part 2 – Functional Description 2–65

2.13 EXV Pre Opening

Function

description

Because the unit stops with a pump down, it will restart with a pre-purge (opening - closing of the

expansion valve).

At start up the valve will open (up to 50%) and close to the evaporator with a certain amount of liquid.

EXV PreOpening

50 %

ESIE07-05.book Page 65 Friday, December 21, 2007 3:21 PM

Содержание

Service manual 1
About this manual 4
Characteristics 5
Safety measures 6
Installation 7
Standard accessories furnished on basic unit 10
Options on request 11
Part 2 functional description 12
Part 2 14
The digital controller 14
What is in this chapter 14
General description 15
Main control software features 16
Component description digital controller 17
Control panel 18
Main board 19
Eexv valve driver 21
Meaning of the driver eexv status leds 23
Addressing of plan 24
Display and keypad 25
Controller menu s 28
Cooling 29
Ent evap xxx c 29
Gg mm aa 29
Lvg evap xxx c 29
Main menu 29
Staging 29
Status 29
Stp source 29
Water temperatures 29
Comp 1 30
Delivsupheat 30
Lvg rec xxx c 30
Position 30
Press barg 30
Status auto xxx 30
Suction 30
Supheat 30
Water temperatures 30
User menu 32
Setting menu 36
Input output menu i o menu 37
Bios date 38
Bios version 38
Boot date 38
Boot version 38
Driver firmware 38
Version 38
Xx xx xx 38
Manufacturer menu 39
090 s s 42
Bar 01 00 bar 42
Bar 20 05 bar 42
Delays 42
Low pressure alarm 42
Max load setp 42
Min load setp 42
Pressure alarm 42
Pressure ratio alarm 42
Run delay 42
S 120 060 s 42
Setpoint 42
Startup delay 42
Transducers high 42
Transducers low 42
020 bar s 43
090 s s 43
10 c c 43
Alarm delays 43
Diff delays 43
Liquid injection 43
Oil high pressure 43
Oil low pressure 43
Run delay 43
Setpoint 43
Startup delay 43
Maintenance menu 44
Comp min load 46
Compressor 46
Dt to reload and 46
Max time min 46
Min evap dt 46
Reunload comp 46
Time to download 46
Buffer n 47
Choose language 47
Compressor 1 47
English 47
Manual load 47
Reset alarm 47
Service menu 47
State auto 47
Alarm menu 48
Buffer alarm menu 49
44 part 2 functional description 50
Alarm list 50
Alarm table chiller 50
Introduction the table below shows the list of the possible alarms with the identifier number the cause and the reset type a auto m manual 50
The digital controller esie07 05 50
Alarm table driver1 51
Alarm table driver2 51
Esie07 05 the digital controller 51
Part 2 functional description 2 45 51
Functional control 53
Part 2 53
What is in this chapter 53
On off management 54
Continuous loading and unloading uses 2 solenoid valves to control the screw compressor slide and thus its capacity control is performed by outlet temperature 55
Esie07 05 book page 49 friday december 21 2007 3 21 pm 55
Esie07 05 functional control 55
In the following flow chart the unit startup management and shutdown procedures are shown as well as the compressors loading and unloading strategy 55
Introduction the thermostat control is used to generate a load up or load down according to the active pid regulation 55
Part 2 functional description 2 49 55
Thermostat control 55
Unit and compressor start up and shutdown procedure 55
50 part 2 functional description 56
Compressors start up and loading management 4 compressors 56
Functional control esie07 05 56
Unit s hutdown request 56
Unit shutdown 56
Compressors unload and shutdown management 4 compressors 57
Esie07 05 functional control 57
Part 2 functional description 2 51 57
52 part 2 functional description 58
A t in load band load up to 75 stop off off 58
B t not in load band fixed at 50 stop off off 58
Dead band 0 c 58
Functional control esie07 05 58
If setp t shutdown dt cooling 58
If t is approaching setp waiting 58
Interstage 210 s 58
Loading and unloading zones the graph below shows the different loading and unloading zones 58
Max pull down 0 min 58
Off off off off 58
Or t setp shutdown dt heating 58
Reload t 0 c 58
Settings do not change 58
Stop off off off 58
Unload up to 25 off off off 58
Waiting 58
Cooling double 60
Enable double 60
Heating double 60
Setpoint 60
Setpoint reset of the chilled water 60
Setpoint y 60
Chlwt return reset 62
Max reset 3 c 62
Return water reset 62
Start dt 62
Freeze up control 63
58 part 2 functional description 64
Anti freeze alarm 64
Evap 1 anti freeze alarm 64
Evap 2 anti freeze alarm 64
Function description 64
Functional control esie07 05 64
In case the unit has 2 evaporators 64
Setpoint 64
Enable soft load 65
Max stage 65
Max time 65
Y enable soft load 65
Current limit 66
Current limit set 66
Demand limit 66
Max curr 66
Unit limiting 66
Unit load limiting 66
High chlwt start 67
Max comp stage 67
Start up with high evaporator water temperature 67
Delay on switching 68
Pump control 68
Pump fan and comp 68
The main pump off 68
Time between main 68
Auto restart after power failure function 69
Autorestart after 69
Power failure y n 69
Liquid injection 70
Setpoint 70
Exv pre opening 71
Exv preopening 71
Compressor configuration 72
Numbers of compressors 72
Numbers of evaporators 1 2 72
Auto manual 73
C 1 1st 73
C 2 2nd 73
C 3 3rd 73
C 4 4th 73
Comp starts 73
Compressor management 73
Compressors 73
Min t between diff 73
Min t between same 73
Min time comp off 180 s 73
Min time comp on 73
Sequencing 73
Set compressor stage 73
68 part 2 functional description 74
Function description 74
Functional control esie07 05 74
High pressure setback 75
Lp prevention 76
Capacity control 77
Number of pulses 77
To load comp 77
To unload comp 77
72 part 2 functional description 78
Compressor loading 78
Compressor unloading 78
Fixed variable 78
Functional control esie07 05 78
Graph 1 a pure proportional logic will load or unload with a frequency related to the set point distance 78
Max pulse period 78
Min pulse period 78
Pulse time 78
Pulse time the time of the pulse time is fixed default 0 s the interval time between two pulses is proportional to the pid proportional integral derivative unit request 78
Esie07 05 functional control 79
Graph 2 the derivative part of the logic controls how the temperature reaches the setpoint if it is getting closer increases the time between intervals or if it is far from the setpoint decreases the time between intervals the result is having the controller act differently whenever the water temperature changes 79
If the derivative time is increased the control will be more sensitive to temperature changes for example the derivative time can be increased when a chiller is working with a very variable load the integral time stores the memory on how the p 1 controls the temperature 79
Part 2 functional description 2 73 79
Enable 80
Max time 80
Min press 80
Pump down config 80
Pump down configuration at compressor stop 80
Pressure alarm 81
Pressure safeties 81
Setpoint 81
Transducer high pressure alarm 81
Transducers high 81
Transducer low pressure alarm 82
Low press alarm delays 83
Lp alarm delay 83
Run delay 83
Start up delay 83
Max load setp 84
Min load setp 84
Oil management safeties 84
Pressure ratio alarm 84
High oil dp alarm 85
Pressure ratio alarm 85
Pressure ratio alarm delay 85
Run delay 85
Setpoint 85
Start up delay 85
Part 3 troubleshooting 87
Part 3 89
Procedure for software upload download 89
What is in this chapter 89
Copy from the software key to pco 90
Copy from the software key to pco² 90
Copy from pco to the software key 91
Copy from pco² to the software key 91
Installation of winload32 on the pc and programming a controller 92
Go to the winload32 program page 93
Select chiller pco² page 93
Double click on the file 95
Press on extract 95
Select winload32 exe 95
The file winload32 v3 0 is now saved on the hard disk of your pc 95
Winzip will open 95
Click on the model name 97
Click to download the file 97
Go back to the pco² software download page on the extranet 97
Select save to download the file to your pc 97
Please check that you have 4 times 106
Upload completed successfully 106
Copy software from winload32 to the software key 107
Part 3 109
Plan setting 109
What is in this chapter 109
I o board adr 110
Plan setting 110
Press enter 110
Priv shared 110
Terminal adr 16 110
Terminal config 110
To continue 110
Part 4 commissioning and test run 111
Part 5 maintenance 113
Maintenance 115
Part 5 115
What is in this chapter 115
Screw compressors 116
Standard controls 117
System maintenance 118
Preventive maintenance schedule 121
Refrigerant 122
Appendix b 123
Part 6 123
What is in this chapter 123
General chiller start up guide 124

Daikin EWWQ440AJYNN/A [71/130] Exv pre opening

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