Inverter Air To Water Heat Pumps - Daikin

Installation, Operation and Maintenance ManualD–EIMHP00508-16ENInverter air to water heat pumpsEWYD 250-580BZSSEWYD 250-570BZSL50Hz – Refrigerant: R-134ªOriginal Instructions

IMPORTANTThis Manual is a technical aid and does not represent a binding offer for Daikin.Daikin has drawn up this Manual to the best of its knowledge. The content cannot be held as explicitly or implicitlyguaranteed as complete, precise or reliable.All data and specifications contained herein may be modified without notice. The data communicated at the momentof the order shall hold firm.Daikin shall assume no liability whatsoever for any direct or indirect damage, in the widest sense of the term,ensuing from or connected with the use and/or interpretation of this Manual.The entire content is protected by Daikin copyright.WARNINGBefore starting the installation of the unit, please read this manual carefully. Starting up the unit is absolutelyforbidden if all instructions contained in this manual are not clear.Key to symbolsImportant note: failure to respect the instruction can damage the unit or compromise operationNote regarding safety in general or respect of laws and regulationsNote regarding electrical safetyDescription of the labels applied to the electrical panelLabel Identification1 – Non flammable gas symbol2 – Manufacturer’s logo3 – Gas type4 – Electrical hazard symbol5 – Hazardous Voltage warningD-EIMHP00508-16EN - 2/646 – Cable tightening warning7 – Water circuit filling warning8 – Lifting instructions9 – Unit nameplate data

IndexGeneral information . 5Purpose of this manual . 5Receiving the machine . 5Checks . 5Nomenclature . 6Technical Specifications . 7Storage . 15Operation . 15Mechanical installation . 17Shipping . 17Responsibility . 17Safety . 17Moving and lifting. 17Positioning and assembly . 18Minimum space requirements . 19Sound protection . 20Water piping . 20Water treatment . 22Evaporator and recovery exchangers anti-freeze protection . 22Installing the flow switch . 22Hydronic kit (optional) . 23Electrical installation . 28General specifications . 28Electrical components . 28Electrical wiring. 28Electrical heaters . 28Electrical power supply to the pumps . 29Water pump control . 29Alarm relays – Electrical wiring . 30Unit On/ Off remote control – Electrical wiring . 30Double Setpoint – Electrical wiring . 30External water Setpoint reset – Electrical wiring (Optional) . 30Unit limitation – Electrical wiring (Optional) . 30The VFD and related problems . 31The operating principle of the VFD . 32The problem with harmonics . 32Operation . 35Operator’s responsibilities . 35Description of the machine . 35Description of the refrigeration cycle . 35Description of the refrigeration cycle with heat recovery . 37Controlling the heat recovery circuit and installation recommendations . 37Compressor . 39Compression process . 39Cooling capacity control . 41Pre-startup checks . 43Units with an external water pump. 44Units with a built-in water pump . 44Electrical power supply . 44Unbalance in power supply voltage . 44Power supply of electrical heaters . 45Startup procedure . 46Turning on the machine . 46Selecting an operating mode . 47Shutdown for a long time . 47Starting up after seasonal shutdown . 47System maintenance. 48General. 48Compressor maintenance . 48Lubrication . 48Routine maintenance. 49Replacement of filter dryer . 50Procedure to replace the filter dryer cartridge . 50Replacement of the oil filter . 51Procedure to replace oil filter . 51Procedure to replenish refrigerant . 53Standard checks . 54D-EIMHP00508-16EN - 3/64

Temperature and pressure sensors. 54Test sheet . 55Water side measurements . 55Refrigerant side measurements . 55Electrical measurements . 55Service and limited warranty. 56Periodic obligatory checks and starting up of appliances under pressure . 57Important information regarding the refrigerant used . 58Disposal. 60Index of tablesTable 1 - Acceptable water quality limits 22Table 2 - Electrical data of optional pumps .29Table 3 - Typical working conditions with compressors at 100%.46Table 4 - Routine maintenance programme 49Table 5 - Pressure/ Temperature .53Index of figuresFigure 1 - Operating limits in cooling mode - EWYD BZSS / EWYD BZSL .16Figure 2 - Operating limits in heating mode - EWYD BZSS / EWYD BZSL .16Figure 3 - Lifting the unit .18Figure 4 - Minimum clearance requirements for machine maintenance .19Figure 5 - Minimum recommended installation clearances 20Figure 6 - Water piping connection for evaporator .21Figure 7 - Water piping connection for heat recovery exchangers .21Figure 8 - Adjusting the safety flow switch .23Figure 9 - Single- and twin-pump hydronic kit .23Figure 10 - Low lift water pumps kit (option on request) - Lift diagrams .24Figure 11 - High lift water pumps kit (option on request) - Lift diagrams .25Figure 12 - Evaporator pressure drop .26Figure 13 - Partial heat recovery pressure drop .27Figure 14 - User connection to the interface M3 terminal boards .31Figure 15 - Power absorbed by the compressor depending on the load .32Figure 16 - Typical diagram of a VFD .33Figure 17 - Harmonics on the grid 33Figure 18 - Harmonic content with and without line inductance 34Figure 19 - Harmonic content varying according to the percentage of non-linear loads .34Figure 20 - Refrigeration cycle 36Figure 21 - Refrigeration cycle with partial heat recovery .38Figure 22 - Picture of Fr3100 compressor .39Figure 23 - Compression process .40Figure 24 - Capacity control mechanism for Fr3100 compressor .41Figure 25 - Continuously variable capacity control for Fr3100 compressor 42Figure 26 - Installation of control devices for Fr3100 compressor .49Figure 27 - Front and back views for Fr3100 52D-EIMHP00508-16EN - 4/64

General informationATTENTIONThe units described in the present manual represent a high value investment, maximum care should be taken toensure correct installation and appropriate working conditions.Installation and maintenance must be performed by qualified and specifically trained personnel only.Correct maintenance of the unit is indispensable for its safety and reliability. Manufacturer’s service centres are theonly having adequate technical skill for maintenance.ATTENTIONThis manual provides information about the features and standard procedures for the complete series.All the units are delivered from factory as complete sets which include wiring diagrams, inverter manuals,dimensional drawings with dimensions and weight, nameplate with technical characteristics attached to the unit.WIRING DIAGRAMS, INVERTER MANUALS, DIMENSIONAL DRAWINGS AND NAMEPLATE MUST BECONSIDERED ESSENTIAL DOCUMENTS AND AS A PART OF THIS MANUALIn case of any discrepancy between this manual and the equipment’s document refer to on board documents.For any doubt ask Daikin or authorized centersPurpose of this manualThe purpose of this manual is to allow the installer and the qualified operator to carry out required operations in order toensure proper installation and maintenance of the machine, without any risk to people, animals and/or objects.This manual is an important supporting document for qualified and trained personnel but it is not intended to replacesuch personnel.All activities must be carried out in compliance with local laws and regulations.Receiving the machineThe machine must be inspected for any possible damage immediately upon reaching its final place of installation. Allcomponents described in the delivery note must be carefully inspected and checked; any damage must be reported tothe carrier. Before connecting the machine to earth, check that the model and power supply voltage shown on thenameplate are correct. Responsibility for any damage after acceptance of the machine cannot be attributed to themanufacturer.ChecksTo prevent the possibility of incomplete delivery (missing parts) or transportation damage, please perform the followingchecks upon receipt of the machine:a) Before accepting the machine, please verify shipment documensts and chechs the number of shipped itemsb) Check every single component in the consignment for missing parts or for any damage.c) In the event that the machine has been damaged, do not remove the damaged material. A set of photographs arehelpful in ascertaining responsibility.d) Immediately report the extent of the damage to the transportation company and request that they inspect themachine.e) Immediately report the extent of the damage to the manufacturer representative, so that arrangements can bemade for the required repairs. In no case must the damage be repaired before the machine has been inspectedby the representative of the transportation company.D-EIMHP00508-16EN - 5/64

NomenclatureE W Y1 2 3D4250607B8Z S L9 10 11Machine typeEWA Air-cooled chiller, cooling onlyEWY Air-cooled chiller, heat pumpEWL Remote condenser chillerERA Air cooled condensing unitEWW Water-cooled chiller, cooling onlyEWC Air-cooled chiller, cooling only with centrifugal fanEWT Air-cooled chiller, cooling only with heat recoveryRefrigerantD R-134aP R-407cQ R-410aCapacity class in kW (Cooling)Always 3-digit codeIdem as previousModel seriesLetter A, B, : major modificationInverter Non-inverterZ InverterD-EIMHP00508-16EN - 6/64Efficiency levelS Standard efficiencyX High efficiencyP Premium efficiencyH High ambient(McQuay code)(SE)(XE)(N.A for this range)(PE)(N.A for this range)(HA)(N.A for this range)Sound levelS Standard noiseL Low noiseR Reduced noiseX Extra low noiseC Cabinet(McQuay code)(ST)(LN)(XN)(N.A for this range)(XXN)(N.A for this range)(CN)(N.A for this range)

Technical SpecificationsEWYD BZSSTECHNICAL SPECIFICATIONSCapacity (1) (2)Capacity controlUnit power input (1) (2)CoolingHeatingTypeMinimum capacityCoolingHeatingEER (1)COP htWater heat exchangerUnitOperating WeightTypeWater volumeNominal water flow rateNominal water flow rateNominal Water pressure dropNominal Water pressure dropInsulation materialAir heat exchangerTypeFanTypeDriveDiameterNominal air tingQuantitySpeedMotor inputSound levelSound Pressure (3)Refrigerant circuitPiping connectionsSafety devicesNotes (1)Notes (2)Notes (3)Refrigerant typeRefrigerant chargeN. of circuitsEvaporator water 071172.692.793.032.844.014.074.624.75Ivory WhiteGalvanized and painted steel 4438138704010Single Pass Shell&Tube13813.9415.494858Closed cell13315.4615.89535513316.2116.665860High efficiency fin and tube typewith integral subcoolerDirect propeller 01.758004230489201.758004230489201.75Semi-hermetic single screwcompressor Inverter driven---Oil chargeQuantitySound 7High discharge pressure (pressure switch)High discharge pressure (pressure transducer)Low suction pressure (pressure transducer)Compressor overload (Kriwan)High discharge temperatureLow oil pressureLow pressure ratioHigh oil filter pressure dropPhase monitorCooling capacity, unit power input in cooling and EER are based on the following conditions: evaporator 12/7 C; ambient35 C, unit at full load operation.Heating capacity, unit power input in heating and COP are based on the following conditions: condenser 40/45 C; ambient7 C DB, unit at full load operation.The values are according to ISO 3744 and are referred to: evaporator 12/7 C, ambient 35 C, full load operation.D-EIMHP00508-16EN - 7/64