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Daikin EUWA20HDW15 [5/18] Measuring devices
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4
When activated, they reset automatically, but the controller
needs to be reset manually.
–
Low pressure safety
(circuit safety device)
When the suction pressure of a circuit is too low, the circuit
controller shuts down the circuit. When the pressure returns to
normal, the safety device can be reset on the controller.
– Reverse phase protector (general safety device)
The reverse phase protector (R1P) is installed in the main
switch box of the unit. It prevents the compressors from running
in the wrong direction. If the unit does not start, two phases of
the power supply must be inverted.
– Discharge thermal protector (circuit safety device)
The discharge thermal protectors (Q*D) are activated when the
temperature of the refrigerant leaving the compressor becomes
too high. When the temperature returns to normal, the protector
resets automatically, but the controller needs to be reset
manually.
– Outlet water temperature sensors (circuit safety device)
The outlet water temperature sensors (R4~6T) measure the
temperature of the water at the water heat exchanger outlet.
The protection device shuts down the circuit when the
temperature of the chilled water becomes too low in order to
prevent freezing of the water during operation.
When the outlet water temperature returns to normal, the
protector resets automatically.
– Additional interlock contact (general safety device)
To avoid that the unit could be started or run without water
circulating through the water heat exchanger, an interlock
contact (S10L) of e.g. a flow switch must be switched in the
start-up circuit of the unit.
– Fan motor thermal protector (part safety device)
The fan motors are equipped with thermal protectors (Q*F).
The protectors are activated when the temperature becomes
too high. When temperature returns to normal, the protector
resets automatically.
Measuring devices
Checking the high and low pressure of the refrigerant circuit is
necessary to ensure the proper operation of the unit and to
guarantee that the rated output will be obtained. The unit can
therefore be equipped with an optional high and low pressure
gauge. Refer to "Switching the unit on" for the acceptable pressures.
– High pressure gauge
The high pressure gauge indicates the discharge pressure
(pressure at the outlet of the compressor).
– Low pressure gauge
The low pressure gauge indicates the suction pressure
(pressure at the inlet of the compressor).
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below:
C1~6 .............. Capacitors for fanmotors
E1,2,3H ......... Crankcase heater
F1,2,3U.......... Fuses (field supply)
F5B ................ Fuse for primary of TR1
F6B ................ Fuse for secondary of TR1
F7B ................ Fuse for fan circuit + control circuit
H1P ............... Indication lamp alarm (field supply)
H2P ............... Indication lamp general operation (field supply)
H3,4,5P ......... Indication lamp operation of compressor (field supply)
J1,2 ............... Connector for analog input
J3,4,21 .......... Connector for digital input
J5,6,22,24 ..... Connector for digital output
J17 ................ Connector for power supply of controller
K1,2,3M ........ Compressor contactor
K4,5,6S ......... Over current relay
K1,2,3A ......... Auxiliary relay for safety
K4A ............... Auxiliary relay for reverse phase protector
K12,13,14,15A .
Auxiliary relay for fan speed control
KP.................. Pumpcontactor (field supply)
L1,L2,L3 ........ Live
M11~32F ....... Fan motor
M1,2,3C ........ compressor motor
N.................... Neutral
PE .................. Main earth terminal
Q1,2,3D ......... Discharge thermal protector
Q11~32F........ Fan thermal protector
R1P ............... Reverse phase protector
R3T ............... Sensor for ambient temperature measurement
R4,5,6T ......... Outlet water temperature sensor
R7T ............... Sensor for evaporator inlet water temperature
measurement
S1,2,3HP ....... High pressure switch
S1,2,3LP ....... Low pressure switch
S8S ............... Switch for dual setpoint (field supply)
S9S ............... Switch for remote start/stop (field supply)
S10L .............. Flowswitch (field supply)
S11L .............. Contact that closes if the pump is working (field supply)
S12S ............. Main isolator switch (field supply)
TR1 ............... Transfo 230V ➞ 24V (30VA) for power supply of
controllers
TR2 ............... Transfo 24V ➞ 24V (10VA)
X*A,X*B ........ Interconnection connector switchbox 1, switchbox 2
X*A,X*C ........ Interconnection connector switchbox 1, switchbox 3
X*B,X*C ........ Interconnection connector switchbox 2, switchbox 3
Содержание
- Operation manual 1
- Packaged air cooled water chillers 1
- Electrical specifications 1 2
- Ntroduction 2
- Ontents 2
- Operation manual 2
- Technical specifications 1 2
- Escription 3
- Euwa20 3
- Euwa25 3
- Function of the main components 4
- Safety devices 4
- Internal wiring parts table 5
- Measuring devices 5
- Checks before initial start up 6
- Efore operation 6
- General recommendations 6
- Power supply connection and crankcase heating 6
- Water supply 6
- Digital controller 7
- Peration 7
- Working with the unit 7
- Adjusting the temperature setpoint 8
- Consulting actual operational information 8
- Enter the readout menu using the a key 8
- Enter the setpoints menu using the z key 8
- If the manual control mode is selected refer to the user settings menu none of the above mentioned setpoints will be active 8
- If the remote on off control parameter is set to no 8
- If the remote on off control parameter is set to yes 8
- If the unit does not start after a few minutes consult the readout menu which gives the status of the different circuits refer to paragraph consulting actual operational information also refer to the chapter trouble shooting 8
- Press j to save the adjusted temperature setpoint or press the z key to cancel the modification 8
- Press the f key on the controller 8
- Press the f key on the controller or switch the unit off using the remote on off switch 8
- Press the h key to adjust the temperature setting 8
- Press the w key to return successively to the second and the first screen of the readout menu 8
- Press the x key to enter the second screen of the readout menu 8
- Press the x key to enter the third screen of the readout menu 8
- Select the setpoint to be adjusted using the j key 8
- Setp cool 1 inlet water temperature cooling setpoint 1 8
- Setp cool 2 inlet water temperature cooling setpoint 2 8
- Switching the unit off 8
- The pressures measured will vary between a maximum and minimum value depending on the water and outdoor temperatures at the moment of measurement 8
- 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 8
- The unit provides definition and selection of two independent temperature setpoints for cooling operation 8
- To adjust a setpoint proceed as follows 8
- To adjust other setpoints repeat from instruction 2 onwards 8
- Advanced features of the digital controller 9
- History menu t t t t t 10
- Info menu y y y y y 10
- Input output menu u u u u u 10
- Safeties menu g g g g g 10
- The history menu contains all the information concerning the latest shutdowns 10
- The input output menu gives the status of all the digital inputs and the relay outputs of the unit 10
- The safeties menu provides useful information for trouble shooting purposes 10
- Timers menu r r r r r 10
- To calibrate the sensor for inlet water temperature measurement 10
- To change the user password 10
- To check the actual value of the compressor timers 10
- To check the actual value of the general software timers 10
- To check the status of circuit 1 at activation of one of the circuits safeties 10
- To check the status of circuit 2 at activation of one of the circuits safeties 10
- To check the status of circuit 3 at activation of one of the circuits safeties 10
- To check the status of the alarm the operation and the pump voltage free contacts 10
- To check the status of the circuit safeties 10
- To check the status of the evaporator heater however the evaporator heater option is not offered by daikin 10
- To check the status of the fanspeed relays 10
- To check the status of the flowswitch 10
- To check the status of the low pressure bypass switches 10
- To check the status of the remote setpoint selection switch the remote on off switch and the reverse phase protector 10
- To check whether or not the different compressors are activated 10
- To consult additional information about the unit such as the unit name the refrigerant used and the manufacturing number 10
- To consult information about the controller s software version 10
- To consult information about the number of circuit 1 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of circuit 2 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of circuit 3 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of shutdowns the unit safety which caused the most recent shutdown and the unit status at this shutdown 10
- To consult information about the unit safety which caused the shutdown and to check the unit status at shutdown 10
- To consult the outlet water inlet water and ambient temperature limits 10
- To define whether or not a password is needed to change the temperature setpoint 10
- User password menu q q q q q 10
- When automatic control mode is selected the unit uses default a 2 step thermostat to control the cooling load however the thermostat parameters are not fixed and can be modified via the thermostat settings screen of the user settings menu 11
- Rouble shooting 14
- Aintenance 17
- Disposal requirements 17
- Maintenance activities 17
- Thermostat parameters 17
- Pwen09719 1b 18
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