Related Manuals for Daikin EWYD-BZ
Summary of Contents for Daikin EWYD-BZ
- Page 1 parteinvert Date November 2020 Supersedes D-EOMCP00104-14EN Operating Manual D-EOMCP00104-14_01EN Air Cooled chiller/heat pump with screw compressors EWYD_BZ...
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Page 2: Table Of Contents
D-EOMCP00104-14_01EN Operating Manual TABLE OF CONTENTS 1 SAFETY CONSIDERATIONS ............................4 General..................................4 Before switching the unit ............................4 Avoid electrocution ..............................4 2 ABOUT THIS DOCUMENT ............................. 5 Contents .................................. 5 Revision history ............................... 5 Abbreviations used..............................5 References ................................5 3 CONTROL SYSTEM DESCRIPTION .......................... - Page 3 Operating Manual D-EOMCP00104-14_01EN 5.23.2 Variable Speed Driver ..........................25 5.23.2.1 VSD in cooling, cooling glycol or ice mode ..................25 5.23.2.2 VSD in heating mode ........................... 26 5.23.3 Speedtroll..............................26 5.23.4 Fans control at startup in heating mode ....................... 26 5.24 Other functions ..............................
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Page 4: Safety Considerations
D-EOMCP00104-14_01EN Operating Manual SAFETY CONSIDERATIONS 1.1 General Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the installation are not considered: operating pressures, presence of electrical components and voltages and the installation site (elevated plinths and built-up up structures). -
Page 5: About This Document
Operating Manual D-EOMCP00104-14_01EN ABOUT THIS DOCUMENT 2.1 Contents This document contains information and instructions to operate the control panel of EWYD_BZ units starting from application software version ASDU30A. 2.2 Revision history Version Date Validity D-EOMCP00104-14_01EN November 2020 Application software version ASDU30A and further D-EOMCP00104-14EN April 2014 Application software versions up to ASDU29A... -
Page 6: Control System Description
D-EOMCP00104-14_01EN Operating Manual CONTROL SYSTEM DESCRIPTION 3.1 Architecture The overall control system architecture is described in the following picture: Model Function Mandatory Board Unit control pCO5+ “Large” pCO Controller #1 Compressors #1 & #2 control Built In display (*) Yes on 3 pCO5 “Small”... -
Page 7: Main Components
Operating Manual D-EOMCP00104-14_01EN 3.2 Main components Unit controller “EVD Evolution” - Electronic Expansion Valves controller EWYD_BZ 7/35... -
Page 8: Components Operating Limits
D-EOMCP00104-14_01EN Operating Manual “EVD Evolution” - Electronic Expansion Valves controller – Graphic Display “pCOe” - I/O Expansion board 3.3 Components operating limits Component Temperature [°C] r.H. non-condensing [%] pCO5+ (built-in display) -20 ÷ 60 < 90 pCO5+ -40 ÷ 70 <... -
Page 9: Using The Controller
Operating Manual D-EOMCP00104-14_01EN USING THE CONTROLLER Two types of user interface are implemented in the software: built-in display and PGD; the PGD display is used as optional remote display. Both interfaces have a 4x20 LCD display and a 6 keys keypad. Built-In Display PGD Display Built-In... -
Page 10: Mask Tree
D-EOMCP00104-14_01EN Operating Manual When a password is active, pressing UP+DOWN it is possible to reset all passwords (to make the access to protected values not accessible anymore without the re-insertion of the password). In any main loops it is possible to change the password for the corresponding level (Unit Config for Tech password, User Setpoint for Operator password and Maint Setpoint for Manager password). -
Page 11: Measure Units
As far as pressure is concerning, the interface shows if shown data are gauge or absolute using the postfix “g” or “a” respectively. Default passwords Several levels of passwords for each subsection are available. Subsections are listed in the table below. Section Password Super User Daikin Use Only Technician Authorized Personnel can Contact Factory Operator 0100 EWYD_BZ 11/35... -
Page 12: Working With This Unit
D-EOMCP00104-14_01EN Operating Manual WORKING WITH THIS UNIT 5.1 Controller purpose Then system will control the evaporator leaving water temperature to keep it at a setpoint value. The system operates to optimize components performances from the point of view of their efficiency and of their duration. The system assures a safe operation of the unit and of all components and prevents dangerous situations. -
Page 13: Setpoints Management
Operating Manual D-EOMCP00104-14_01EN The selection between cooling, cooling/glycol and ice mode are performed by the operator using the interface under password. The switching between cooling and ice and heating modes will cause the unit shutdown and than the switching between the two modes. 5.4 Setpoints management The control is able to manage the evaporator leaving water temperature on the base of several inputs: •... -
Page 14: Return Setpoint Override
D-EOMCP00104-14_01EN Operating Manual Used Setpoint Reset Start Reset T Reset Delta T 5.4.3 Return setpoint override The base setpoint is modified on the base of evaporator T and of a max reset value, of a value of OAT to start reset and a value of OAT to apply max reset, as shown in the picture below: Used Setpoint Max Reset... - Page 15 Operating Manual D-EOMCP00104-14_01EN compressor load evaluation (based on analog slide valve position or calculation ) is used to allow the start of another computer or the stop of a running one. It is required to define the proportional band and the derivative time of the PD control, together with the pulse duration and a minimum and maximum value for pulses interval.
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Page 16: Manual Control
D-EOMCP00104-14_01EN Operating Manual Fixed pulse duration Variable pulse interval Loading or unloading pulses Action Measure Set Point -Max Dead Band Regulation Band PD controller proportional action 5.5.2 Manual Control The control will apply a fixed duration pulse (the magnitude is the pulse duration set in the automatic control) for each manual (by keyboard) load or unload signal. - Page 17 Operating Manual D-EOMCP00104-14_01EN Compressors startup and loading management (4 compressors unit) Table 2 - Step n. Leader Comp. Lag 1 Comp. Lag 2 Comp. Lag 3 Comp. (T – SetP) < Startup DT & Cooling (SetP - T) < Startup DT &...
- Page 18 D-EOMCP00104-14_01EN Operating Manual Table 3 - Compressors unloading and shutdown management (3 compressors unit) Step n. Leader Comp. Lag 1 Comp. Lag 2 Comp. 100% 100% 100% Fixed at 100% Fixed at 100% Fixed at 100% Fixed at 100% Fixed at 100% Unload up to 75% Fixed at 100% Unload up to 75%...
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Page 19: Compressors Timing
Operating Manual D-EOMCP00104-14_01EN Table 4 - Compressors shutdown scheme in Ice mode (3 compressors unit) Evap Lvg Temp Compressors status SetP – SDT/n < Evap Lvg Temp < SetP All compressors allowed to run SetP – 2*SDT/n < Evap Lvg Temp < SetP– SDT/n (n-1) compressors allowed to run SetP –... -
Page 20: Energy Saving Mode
D-EOMCP00104-14_01EN Operating Manual Where: DischTemp is the compressor discharge temperature TOilPress is the saturated temperature at the oil pressure 5.13 Energy Saving mode The energy saving function reduces the power consumption deactivating the compressors crankcase heater, when the chiller is Disabled. This mode implies that the time needed to start the compressors, after an Off period, could be delayed until a maximum of 90 minutes. -
Page 21: Switching From Heating Modes To Cooling Modes
Operating Manual D-EOMCP00104-14_01EN 5.17.2 Switching from heating modes to cooling modes 5.17.2.1 Compressor running in heating mode A compressor running in heating mode (four-way valve energized) is switched off without executing pumpdown, the four-way valve is de-energized 5 seconds after the compressor has been switched off, than the compressor is switched on after the minimum time compressor off is expired and the standard prepurge procedure is executed. -
Page 22: Recovery Control
D-EOMCP00104-14_01EN Operating Manual recovery circuit operation, the related compressor will trip and the alarm reset will not be allowed up to the flow is recovered (otherwise recover heat exchanger freeze will occur). 5.20.2 Recovery control When heat recovery is activated the control will activate or deactivate recovery circuits with a step logic. In particular a next heat recovery stage is activated (a new heat recovery circuit is inserted) if the heat recovery leaving water temperature remains below the setpoint by an amount greater than an adjustable regulation band for a timer greater than an adjustable value (heat recovery interstage). -
Page 23: Unit Limiting
Operating Manual D-EOMCP00104-14_01EN • Absorbed inverter current The compressor load is inhibited if, the absorbed inverter current is above an adjustable threshold . The compressor is unloaded if the absorbed inverter current is above the inhibit threshold of an adjustable percentage. -
Page 24: Fantroll In Cooling Mode
D-EOMCP00104-14_01EN Operating Manual Fan steps are activated or deactivated on the base of the staging table below Steps staging N° of fans per circuit Stage Active step 1+2+3 1+2+3 1+2+3 1+2+3 1+2+3 1+2+3 1+2+3 1+2+3+4 1+3+4 1+3+4 1+3+4 1+3+4 1+2+3+4 1+2+3+4 1+2+3+4 1+2+3+4... -
Page 25: Variable Speed Driver
Operating Manual D-EOMCP00104-14_01EN up dead band (high condensing temperature error). In particular the stage up is executed when the integral of the high condensing temperature error reaches the value 50 °C x sec (90 F x sec). At the same manner a stage down is executed (the previous stage is activated) if the evaporating saturated temperature exceeds the target setpoint by an amount equal to a stage down dead band by a time depending by the difference between th e reached the target setpoint minus the stage down dead band values and the reached value (low condensing temperature error). -
Page 26: Vsd In Heating Mode
D-EOMCP00104-14_01EN Operating Manual 5.23.2.2 VSD in heating mode 5.23.2.2.1 Control of evaporation temperature When the system is operating in heating mode to control the evaporation temperature the proportional gain is negative (the higher the input the lower the output). Action Controlled Set Point Variable... - Page 27 Operating Manual D-EOMCP00104-14_01EN Pwr Loss Enter Start Power failure. Press Enter button to start the Unit. Off Amb. Lockout Unit is off due to external temperature below ambient lockout threshold. Waiting Flow Unit is verifying the flow switch status before temperature control start.
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Page 28: Start-Up Sequence
D-EOMCP00104-14_01EN Operating Manual 5.26 Start-up sequence 5.26.1 Unit start-up and shut-down flowcharts Unit Start Evap pump start Evap flow switch Unit Trip consensus within timer expiration Temperature control start Temperature control stabilitation Compressors start enabled Control requires unit Control requires unit Control requires unit loading standby... - Page 29 Operating Manual D-EOMCP00104-14_01EN Unit Stop Compressors shutdown procedure Evap flow switch open Unit Trip within timer expiration Unit Off EWYD_BZ 29/35...
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Page 30: Heat Recovery Start-Up And Shut-Down Flowcharts
D-EOMCP00104-14_01EN Operating Manual 5.26.2 Heat recovery start-up and shut-down flowcharts Heat recovery activation Heat recovery pump start Recovery flow switch HR Trip consensus within timer expiration HR temperature control start HR temperature control stabilitation HR circuits activation enabled HR 3Way valve HR leaving temperature modulating above limit... - Page 31 Operating Manual D-EOMCP00104-14_01EN Heat Recovery Stop Circuits deactivation procedure 3Way valve opening Evap flow switch open HR Trip within timer expiration Haet Recovery Off EWYD_BZ 31/35...
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Page 32: Alarms And Troubleshooting
D-EOMCP00104-14_01EN Operating Manual ALARMS AND TROUBLESHOOTING 6.1 Unit trips Unit trips are caused by: • Low evaporator flow rate. A “Low evaporator flow rate alarm” will trip the whole unit if the evaporator flow switch remains open for more than an adjustable value; the alarm are automatically reset for three times if the evaporator flow switch closes for more than 30 seconds. -
Page 33: Other Trips
Operating Manual D-EOMCP00104-14_01EN No delay is introduced if the suction pressure falls below the low pressure alarm setpoint by an amount greater or equal to 1 bar. Five automatic reset alarms (both from transducers and switches) are managed in all modes (cooling, cooling glycol, ice, heat pump). - Page 34 D-EOMCP00104-14_01EN Operating Manual Pump Alarm Pump overload Fan Overload Fan overload OAT Low Pressure Low press alarm during low OAT start. Low Amb Start Fail Low OAT start-up failed Unit 1 Offline Board #1 offline (Master) Unit 2 Offline Board #2 offline (Slave) Evap.
- Page 35 Specification are subject to change without prior notice. Refer to the data communicated at the time of the order. Daikin Applied Europe S.p.A. explicitly rejects any liability for any direct or indire ct damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication.