![Daikin EUW(*)40КХ [168/190] Maintenance of the control devices](/img/pdf.png)
Daikin EUW(*)40КХ [168/190] Maintenance of the control devices
![Daikin EUW(*)40КХ [168/190] Maintenance of the control devices](/views2/1658236/page168/bga8.png)
Maintenance ESIE99–04
5–6 Part 5 – Maintenance
3
1
55
1.3 Maintenance of the Control Devices
Preventive
maintenance
A program of scheduled maintenance should be set up and followed. The items mentioned are to be
used as a guide and must be used in combination with sound electrical and refrigeration workmanship
to ensure trouble free operation and performance.
Liquid line solenoid
valve
The liquid-line solenoid-valve shuts off refrigerant flow during compressor off cycle. Normally they do
not require any maintenance. Follow the instructions below to check the liquid line solenoid valve.
■ Observe operation, there must be no temperature difference before and after the valve in flow
direction.
■ Check the electrical connection. When power is on, the coil stem should be magnetised. Check by
gently touching the top of the stem with a screwdriver.
Refrigerant
sightglass
The refrigerant sight-glass should be observed periodically. A clear glass 15 min. after start-up
indicates an adequate refrigerant charge to ensure proper feed through the expansion valve. Follow
the instructions below to check the moisture.
■ Check the moisture indicator element by comparing it with the sight-glass colour code.
■ If the moisture indicator indicates a wet environment, replace the filter dryer. The moisture indicator
must indicate dry after 10 hours of operation. If not, pump down and change the filter dryer core.
Liquid injection
solenoid valve
Liquid-injection is required during compressor operation to seal and cool the main screw. The liquid
line solenoid valve and the liquid injection solenoid valve close when the compressor is stopped. The
injection solenoid-valve stays open during pump-down. The suction pressure will rise between 0,7 and
1,2 bar. For inspection use the same method as for the liquid-line solenoid-valve.
Filter dryer Follow the instructions below to check the filter dryer.
■ A filter replacement is recommended during scheduled service maintenance or any time when
excessive pressure drop is read across the filter dryer. A partly clogged filter may cause
compressor discharge. Due to insufficient compressor cooling, the filter needs changing when wet
is indicated on the sight-glass moisture element.
■ The maximum allowed pressure drop by 70% to 100% loading is 0,7 bar and by 25% to 50%
capacity 0,3bar.
■ To change the filter dryer core, close the liquid line service valve and follow the pump-down
programme on the controller after 3 LP trips the alarm will sound the end off the pump down cycle.
Some pressure will remain on the LP side due to the liquid injection (compressor cooling cycle).
■ The remaining freon must be evaluated via the pump-out unit to the condenser.
■ Before opening the filter dryer make sure the liquid line and the filter body are warm (To avoid
condensation within the liquid line or filter core).
Flow switch and
pump interlock
Follow the instructions below to check the flow switch and the pump interlock.
■ Check operation by ohmmeter after disconnecting the wires to the field terminals and simulating
flow and no-flow conditions.
■ Inspect the flow-switch for possible corrosion (glycol applications). Check electrical connections for
shunts or bridges.
Содержание
- Esie99 04 1
- Euw 40 200kx 1
- Service manual 1
- Water cooled waterchillers 1
- Esie99 04 3
- Euw 40 200kx 3
- Service manual 3
- Water cooled waterchillers 3
- General outline 5
- Introduction 5
- Part 1 system outline 1 1 5
- Piping layout 5
- Table of contents 5
- Wiring layout 5
- Functional control 6
- Part 2 functional description 2 1 6
- The digital controller 6
- Checking the inputs and outputs 7
- Overview of fault indications and safeties 7
- Overview of inputs and outputs 7
- Part 3 troubleshooting 3 1 7
- Troubleshooting 7
- Appendix a photo parts a 1 8
- Appendix b drawings b 1 8
- Maintenance 8
- Part 4 commissioning and test run 4 1 8
- Part 5 maintenance 5 1 8
- Pre test run checks 8
- Refrigerant r 134a 8
- Test run operation data 8
- About this manual 11
- Introduction 11
- Part 1 system outline 13
- General outline 15
- Part 1 15
- What is in this chapter 15
- 4 part 1 system outline 16
- Euw 40 80kx in the following table you will find the technical specifications of chiller types euw 40 80kx 16
- General outline esie99 04 16
- Technical specifications 16
- Entering leaving water temperature condenser 30 c 35 c 17
- Entering leaving water temperature evaporator 12 c 7 c 17
- Esie99 04 general outline 17
- Nominal conditions are as follows 17
- Part 1 system outline 1 5 17
- Power input is total input compressor control circuit pumps 17
- 6 part 1 system outline 18
- Euw 100 140kx in the following table you will find the technical specifications of chiller types euw 100 140kx 18
- General outline esie99 04 18
- Entering leaving water temperature condenser 30 c 35 c 19
- Entering leaving water temperature evaporator 12 c 7 c 19
- Esie99 04 general outline 19
- Nominal conditions are as follows 19
- Part 1 system outline 1 7 19
- Power input is total input compressor control circuit pumps 19
- 8 part 1 system outline 20
- Euw 160 200kx in the following table you will find the technical specifications of chiller types euw 160 200kx 20
- General outline esie99 04 20
- Entering leaving water temperature condenser 30 c 35 c 21
- Entering leaving water temperature evaporator 12 c 7 c 21
- Esie99 04 general outline 21
- Nominal conditions are as follows 21
- Part 1 system outline 1 9 21
- Power input is total input compressor control circuit pumps 21
- 10 part 1 system outline 22
- Electrical specifications 22
- Entering leaving water temperature condenser 30 c 35 c 22
- Entering leaving water temperature evaporator 12 c 7 c 22
- Euw 40 100kx in the following table you will find the electrical specifications of chiller type euw 40 100kx 22
- General outline esie99 04 22
- Nominal conditions are as follows 22
- Power input is total input compressor control circuit pumps 22
- Entering leaving water temperature condenser 30 c 35 c 23
- Entering leaving water temperature evaporator 12 c 7 c 23
- Esie99 04 general outline 23
- Euw 120 200kx in the following table you will find the electrical specifications of chiller types euw 120 200kx 23
- Nominal conditions are as follows 23
- Part 1 system outline 1 11 23
- Power input is total input compressor control circuit pumps 23
- Outlook drawing 24
- 14 part 1 system outline 26
- 2 1 17 16 26
- 22 25 3 26 7 26
- Euw 80 100kx the figure below displays the outlook of the chiller type euw 80 100kx 26
- For a description of the components of the outlook drawings refer to main components table on page 1 17 26
- General outline esie99 04 26
- Installation outline 30
- Part 1 31
- Piping layout 31
- What is in this chapter 31
- 10 4 3 32
- 20 part 1 system outline 32
- For a description of the components of the piping diagrams refer to parts table of the refrigeration circuit on page 1 22 32
- For a description of the symbols of the piping diagrams which do not have a number refer to used symbols in the functional diagrams on page 1 21 32
- Functional diagram euw 40 100kx the figure below displays the functional diagram of the refrigeration circuit of the chiller types euw 40 100kx 32
- Functional diagram refrigeration circuit 32
- Piping layout esie99 04 32
- Check valve 33
- Esie99 04 piping layout 33
- Flange connection 33
- Flare connection 33
- Flexible connection 33
- For a description of the components of the piping diagrams refer to parts table of the refrigeration circuit on page 1 22 33
- For a description of the symbols of the piping diagrams which do not have a number refer to used symbols in the functional diagrams on page 1 21 33
- Functional diagram euw 120 200kx the figure below displays the functional diagram of the refrigeration circuit of the chiller types euw 120 200kx 33
- Part 1 system outline 1 21 33
- Pinched pipe 33
- Screw connection 33
- Spinned pipe 33
- Symbol description 33
- The table below shows the symbols and their descriptions used in the functional diagrams 33
- Used symbols in the functional diagrams 33
- Parts table of the refrigeration circuit 34
- 24 part 1 system outline 36
- Heat exchanger and filter dryer the picture below shows the heat exchanger the liquid stop valve the filter dryer and its charge valve 36
- Pilot controlled expansion valve the picture below shows the pilot controlled expansion valve the liquid injection valve the liquid line solenoid valve and the sight glass 36
- Piping layout esie99 04 36
- Esie99 04 piping layout 37
- Part 1 system outline 1 25 37
- Unloading solenoid valves the picture below shows the unloading solenoid valves the liquid injection part for compressor cooling the discharge temperature sensor the low pressure service point the liquid injection solenoid valve and the low pressure compensation line for the pilot controlled expansion valve 37
- 26 part 1 system outline 38
- Piping layout esie99 04 38
- Water connection kit option the picture below shows the water connection kit for double circuits 5 which is optional you can see the in and outlet for the evaporator and the condenser and also the flexible joints 38
- Part 1 39
- What is in this chapter 39
- Wiring layout 39
- 28 part 1 system outline 40
- If an optional main switch is requested for the double circuits a small 3th switchbox is added 40
- Location the chiller types euw 40 100kx only have one switch box 40
- Photo switch box for euw 40 100kx the following picture shows the main components of the switch box for the euw 40 100kx types 40
- Switch box layout 40
- The models euw 120 200kx have two switch boxes 40
- Wiring layout esie99 04 40
- Control pcb s5 41
- Esie99 04 wiring layout 41
- Part 1 system outline 1 29 41
- Switch box euw 40 100kx the following figure shows the layout of the switch box for the euw 40 100kx types 41
- Tr1 tr2 41
- 30 part 1 system outline 42
- Photo switch box for euw 120 200kx 42
- The following picture shows the main components of the switch box for the euw 120 200kx types 42
- Wiring layout esie99 04 42
- Control pcb 1 43
- Control pcb 2 43
- Esie99 04 wiring layout 43
- Part 1 system outline 1 31 43
- Switch box euw 120 200kx the following illustration shows the layout of the switch box for the euw 120 200kx types 43
- 32 part 1 system outline 44
- J1 j2 j3 j4 j5 j6 44
- J24 j22 j21 j20 j19 j11 j17 44
- Main board euw 40 200kx the figures below show the pcb board of the chiller type euw 40 100kx the euw 120 200kx types contain 2 pcb boards connected through an address card 44
- Main pcb layout 44
- Wiring layout esie99 04 44
- Assigning the address for double circuits 49
- Esie99 04 wiring layout 49
- Part 1 system outline 1 37 49
- The euw 120 200kx types contain 2 pcb boards a and b the address cards of these pcbs are connected with each other as shown in the illustration below 49
- User terminal 49
- Wiring diagrams 50
- Part 1 51
- Field wiring view and connections 59
- Part 1 59
- Field wiring of the units euw 40 100kx 60
- Bms connectors 61
- Esie99 04 wiring layout 61
- Example 61
- Main rail terminals on field rail 61
- On operation off no operation fl flow switch p pump contact 61
- Part 1 system outline 1 49 61
- Field wiring of the units euw 120 200kx 62
- 52 part 1 system outline 64
- Example 64
- Fl flow switch 64
- Off no operation 64
- On operation 64
- P pump contact 64
- Wiring layout esie99 04 64
- Part 2 functional description 65
- Functional control 67
- Part 2 67
- What is in this chapter 67
- Operation range 68
- Thermostat control 69
- Both conditions ask for capacity the compressor starts to load 71
- Double thermostat the activation of the double thermostat depends on two conditions 71
- Esie99 04 functional control 71
- If then 71
- Inlet water condenser temperature control 71
- One condition asks for unloading the compressor starts to unload 71
- Part 2 functional description 2 7 71
- Set point 30 c a step length b step difference 71
- The illustration below clarifies the temperature control of the inlet water of the condenser the example is given with default settings 71
- The inlet temperature of the condenser 71
- The inlet temperature of the evaporator 71
- Freeze up control 72
- Lead lag control only for euw 120 200kx 74
- Discharge temperature protector 77
- Head pressure setback 78
- Capacity limitation 79
- Part 2 81
- The digital controller 81
- What is in this chapter 81
- The digital controller 82
- Start stop and temperature setting 84
- What happens in the event of an alarm 85
- Menu overview 86
- How to read or adjust parameter settings the programming procedure 88
- Read out menu 89
- Set points menu 92
- User settings menu 95
- Software timers menu 98
- Esie99 04 the digital controller 99
- Example the following view shows an example of the working of the timers 99
- Operation flow flow start flow stop arec 1 guard 1 arec 2 guard 2 loadup download compr started start up timer 1 start up timer 2 without lead lag step 7 step 6 step 5 step 4 step 3 step 2 step 1 initial 99
- Part 2 functional description 2 35 99
- History menu 100
- Info menu 103
- Input output menu 104
- Password menu 108
- Cooling heating menu 109
- Part 3 troubleshooting 111
- Overview of inputs and outputs 113
- Part 3 113
- What is in this chapter 113
- Overview of inputs and outputs of euw 40 100kx 114
- Overview of inputs and outputs of euw 120 200kx 115
- Overview of fault indications and safeties 117
- Part 3 117
- What is in this chapter 117
- Fault indication 118
- Unit safety screens 119
- Circuit safety screens 121
- Safeties overview 123
- Checking the inputs and outputs 125
- Part 3 125
- What is in this chapter 125
- Checking the temperature sensors 126
- Esie99 04 checking the inputs and outputs 127
- Part 3 troubleshooting 3 17 127
- Table 1 in the following table you will find the temperature resistance values of the controller sensors r3t r4t and r5t 127
- Checking the digital inputs and outputs 128
- Checking the power supply and fuses 129
- Part 3 131
- Troubleshooting 131
- What is in this chapter 131
- Items to be checked 132
- General repair procedures 134
- Procedure for the changing and the configuration of the pcb 135
- Unit initialisation 137
- Pump down 141
- Filter procedure 143
- Oil changing procedures 144
- Esie99 04 troubleshooting 145
- Illustration the following photos shows the content of the oil separator 145
- Part 3 troubleshooting 3 35 145
- Refrigerant charging 146
- Part 4 commissioning and test run 149
- Part 4 151
- Pre test run checks 151
- What is in this chapter 151
- General checks 152
- Water piping checks 153
- 1000 kg m³ d thermostat step difference k default 0 k for outlet water control and 0 k for inlet water control 154
- 4186 j kgk 154
- 5 x q x t 0 5 x q x t v m³ 2 x 154
- 6 part 4 commissioning and test run 154
- Calculation of the minimum water volume 154
- Pre test run checks esie99 04 154
- Specific heat capacity of the fluid j kgk default 154
- Specific mass of the fluid kg m³ default 154
- The following calculation method is based on the fact that the water volume in a chiller should be large enough to prevent the compressor from excessive cycling sufficient water volume will give a certain inertia to the system so that water or glycol temperature does not drop too fast when the unit turns on and that the temperature does not rise too fast when the unit turns off 154
- V required system volume m³ q cooling capacity at the lowest capacity step of each chiller in the system w t minimum cycling time allowed by the compressor s default 600 s 154
- Water quality in the table below you will find the required water quality specifications 154
- Electrical checks 155
- Part 4 157
- Test run operation data 157
- Part 4 159
- Refrigerant r 134a 159
- What is in this chapter 159
- What is new 160
- Characteristics 161
- Part 5 maintenance 163
- Maintenance 165
- Part 5 165
- What is in this chapter 165
- Maintenance of the main parts 166
- Maintenance of the control devices 168
- Periodical checks 169
- Appendix a photo parts 171
- Appendix b drawings 175
- Pre commissioning checklist before start up 178
- Application and unit set up 180
- Commissioning data 182
- Esie99 04 185
- General index 185
- Index i 185
- Numerics 185
- Esie99 04 186
- General index 186
- Esie99 04 187
- General index 187
- Index iii 187
- Esie99 04 188
- General index 188
- Esie99 04 189
- General index 189
- Index v 189
- Esie99 04 190
- General index 190
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