Daikin VRV HXY48TAVJU Dimension Guide

Low-temperature hydrobox
HXY48TAVJU
EDUS392021-F18
202009
Engineering Data
60 Hz

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HXY48TAVJU EDUS392021-F18
Table of Contents
1. FeaturesandBenets ................................................................................2
2. Model Names .............................................................................................3
2.1 Low-temperature hydrobox ...............................................................3
2.2 Outdoor Unit......................................................................................3
3. System Layout............................................................................................4
3.1 System Layout ..................................................................................4
3.2 Connection Ratio ..............................................................................4
4. Nomenclature .............................................................................................5
5. Specications .............................................................................................6
6. Dimensions.................................................................................................7
7. Piping Diagrams .........................................................................................8
8. Wiring Diagrams.........................................................................................9
9. Electric Characteristics............................................................................. 11
10.Pump Performance Characteristics..........................................................12
11.Capacity ...................................................................................................13
12.Center of Gravity ......................................................................................14
13.Operation Limits .......................................................................................15
14.Accessories .............................................................................................16
15.Remote User Interface — EKRUAHTB ....................................................17
15.1 To Connect the User Interface ........................................................17
15.2 Name and Function of Buttons and Icons.......................................19
16.Drain Pan — EKHBDPCA2 ......................................................................22

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HXY48TAVJU EDUS392021-F18
1. Features and Benets
Forhighe󰀩ciencyspaceheatingandcooling
Air to water connection to VRVforapplicationssuchasunderoor,airhandlingunits,low
temperatureradiators,…
Leaving water temperature range from 50 to 113°F (10 to 45°C) without electric heater
Super wide operating range for hot/cold water production from -4 to 110°F (-20 to +43°C)
ambient outdoor temperature
Saves time on system design as all water-side components are fully integrated with direct
control over leaving water temperature
Space saving contemporary wall hung design
No gas connection or oil tank needed
Connectable to VRV IV-X heat pump

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HXY48TAVJU EDUS392021-F18
2. Model Names
2.1 Low-temperature hydrobox
Capacity range Capacity index Model name Power supply
4 ton 48 HXY48TAVJU VJ
VJ:1phase,208/230V,60Hz
+1 Low-temperature hydrobox index for calculating system capacity shows in below table.
Please use the index at system connection ratio calculation.
TargetΔTdi󰀨erence[°F] 5.4 7.2 9 10.8 12.6≤
Index 25.6 34.2 42.7 48 48
2.2 Outdoor Unit
Please contact your dealer for the connectable outdoor unit.

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HXY48TAVJU EDUS392021-F18
3. System Layout
3.1 System Layout
Refrigerant piping
VRV indoor unit
Total capacity of connected VRV indoor unit
requires at least 50% of outdoor unit capacity.
Cold water / Hot water
Heat exchange
between refrigerant
and water
Underfloor heating Radiator Ceiling radiator
Low-temperature
hydrobox
The following table indicates the connectable number and capacity range of the low-temperature hydrobox and indoor units.
PleasereferthededicatedEngineeringDataBookforthespecicationofrespectiveindoorunits.
ton 6 8 10 12 14
Minimum VRV indoor unit number 1
Minimum VRV indoor unit capacity ratio 50% or more
Max hydrobox number 1 1 2 2 2
Total indoor capacity ratio range 50-130%
3.2 Connection Ratio
Whenconnectingthelow-temperaturehydrobox,connectVRV indoor units of its total capacity at least 50% of the outdoor unit capability to prevent
thesecondarysidewatertemperaturefromdroppingorfreezingduringdefrostingorON/OFFoftheindoorunit.

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HXY48TAVJU EDUS392021-F18
4. Nomenclature
Minor revision
Power supply symbol
VJ: 1 phase, 208/230V, 60Hz
Indicates minor change category
Indicates major design category
Capacity index
48: 48,000 Btu/h
Low-temperature hydrobox
48 VJ UT A
HXY

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HXY48TAVJU EDUS392021-F18
5. Specications
Low-temperature hydrobox
Model HXY48TAVJU
Power supply V/ph/Hz 208/230V60Hz,1Phase
Nominal
capacity
Cooling +1Btu/h (kW) 42,650(12.5)
Heating +2Btu/h (kW) 48,000(14.0)
Casing (Color / Material) White / Precoated sheet metal
Dimensions (H × W × D) in. (mm) 35 1/16 × 18 7/8 × 13 1/2 (890 × 480 × 344)
Weight lbs (kg) 97 (44)
Water side
heat
exchanger
Type Brazedplate
Quantity 1
Minimumowrate+4gpm (l/min) 3.96 (15)
Water volume gal (L) 0.26 (1)
Insulation material Foamed synthetic elastomer
Pump
Type DC motor
Nr of speeds Inverter controlled
Cooling nominal ESP ft hd (kPa) 24.4 (73)
Heating nominal ESP ft hd (kPa) 21.8 (65)
Power input W 135
Expansion
tank
Volume gal (L) 2.64 (10)
Max water pressure psi (bar) 43.5 (3)
Pre-pressure psi (bar) 14.5 (1)
Water Side Components Safetyvalve(43.5psi),shut-o󰀨valves,owswitch,airpurgevalve,strainer(20mesh)
Waterowraterange gpm (l/min) 3.4 to 11.9 (15 to 45)
Delta T range °F (°C) 5.4 to 14.4 (3 to 8)
Control method Inlet/Outlet delta T control
Outlet temp.
range
Cooling °F (°C) 50 to 68 (10 to 20)
Heating °F (°C) 77 to 113 (25 to 45)
Ambient
temp range
Cooling °F (°C) 50 to 109 (10 to 43)
Heating °F (°C) –4 to 75 (–20 to 24)
Sound +5Power level dBA 60
Pressure level dBA 31
Pipe
connections
Liquid in. (mm) 3/8 (9.5) (Flare)
Gas in. (mm) 5/8 (15.9) (Flare)
Water side connection
+3in. (mm) BSPP,G1-1/4(31.8)
Piping adaptor +3in. (mm) NPTF 1-1/4 (31.8)
Refrigerant type R410A
Refrigerant control Electronic expansion valve
Connectable outdoor unit VRV IV X Heat Pump
Standard accessories Operation/Installationmanual,userinterfacekit,shut-o󰀨valve,userinterfacecover,
bottomplate,topplate,conduitmountingplates,adaptors
Note:
+1. Nominal Cooling Conditions
Ambient:95°FDB,LWT:64.4°F,DeltaT:9°F,FlowRate:9.5gpm
+2. Nominal Heating Conditions
Ambient:44.6°FDB/42.8°FWB,LWT:95°F,DeltaT:9°F,FlowRate:10.6gpm
+3. Connector and adaptor shipped loose
+4. Flow switch setting
+5. The sound pressure level is measured via a microphone at a 1 m distance from the unit.
Itisarelativevalue,dependingonthedistanceandacousticenvironment.
C: 4D128651

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HXY48TAVJU EDUS392021-F18
6. Dimensions
HXY48TAVJU
3D128656
Unit : in. (mm)

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HXY48TAVJU EDUS392021-F18
7. Piping Diagrams
HXY48TAVJU
3D079034
THERMISTOR R1T R2T R3T R4T
DESCRIPTION OUTLET WATER HEAT EXCHANGER THERMISTOR INLET WATER HEAT EXCHANGER THERMISTOR REFRIGERANT LIQUID SIDE THERMISTOR REFRIGERANT GAS SIDE THERMISTOR

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HXY48TAVJU EDUS392021-F18
8. Wiring Diagrams
HXY48TAVJU
C:3D128650

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HXY48TAVJU EDUS392021-F18
HXY48TAVJU
A1P Main PCB (master) R1T Leaving water thermistor
A2P User interface PCB R2T Returning water thermistor
A3P Control PCB R3T Refrigerant liquid thermistor
A5P Remote user interface PCB R4T Refrigerant gas thermistor
C1-C3 Filter capacitor S1L Flow switch
F1U Fuse(T,3.15A,250V) SS1(A1P) Selector switch (emergency)
HAP PCB LED SS1(A2P) Selector switch (main / sub)
K1E Electronic expansion valve SS1(A5P) Selector switch (main / sub)
K*R(A3P) PCB relay T1R Diode bridge
M1P Pump V1C-V2C Ferritecorenoiselter
PS(A1P) Switching power supply X1M-X2M Terminal strip
Q1Dl Ground leakage circuit breaker Z1F(A1P) Noiselter
C: 3D128650

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HXY48TAVJU EDUS392021-F18
9. Electric Characteristics
HXY48TAVJU
Model Power supply Pump
Hz Volts Voltage range MCA MOP Input (W)
HXY48TAVJU 60 208/230 V Max. 253 V
Min. 187 V 2.5 15 135
Symbol:
MCA: Min. Circuit Amps (A)
MOP: Max. Overcurrent Protective Device (A)
Note:
1. Voltage range
Units are suitable for use on electrical systems where voltage supplied to unit is not below or above listed range limits.
2. Maximum allowable voltage unbalance between phases is 2%.
3.SelectwiresizebasedontheMCA.
4.Insteadoffuse,usecircuitbreaker.
C: 4D129499

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HXY48TAVJU EDUS392021-F18
10.Pump Performance Characteristics
3D128653
ESP: External Static Pressure
Flow: Water flow through the unit
Note: Selecting a flow outside the operating area can damage the unit or cause the unit to malfunction.
See also the minimum and maximum allowed water flow range in the technical specifications.

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HXY48TAVJU EDUS392021-F18
11.Capacity

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HXY48TAVJU EDUS392021-F18
12.Center of Gravity
HXY48TAVJU
4D129458

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HXY48TAVJU EDUS392021-F18
13.Operation Limits
HXY48TAVJU
3D128655
Ta: Ambient Temperature LWT: Leaving Water Temperature

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HXY48TAVJU EDUS392021-F18
C: 4P616151-1
14.Accessories
Option HXY48TAVJU
Drain pan EKHBDPCA2
Remote user interface EKRUAHTB
4D128652

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HXY48TAVJU EDUS392021-F18
C: 4P616151-1
15.Remote User Interface — EKRUAHTB
15.1 To Connect the User Interface
Beforeoperatingtheuserinterface,followthisinstallationprocedure.
NOTE
The wiring for connection is not included.
Procedure
Remove the front part of the user interface
Insertaslottedscrewdriverintotheslots(1)intherearpartoftheuserinterface,andremovethefrontpartoftheuserinterface.
1
NOTE
The PCB is mounted in the faceplate of the user interface.
Be careful NOT to damage it.
Fixation of the user interface to the wall in case of installation as room thermostat
1. Cuto󰀨a2wireconductor.
2. Fix the wallplate of the user interface to the wall.
3. Connect the wires tot the user interface as shown below.
NOTE
Be careful NOT to distort the shape of the backside of the user
interface by overtightening the mounting screws..
From the bottom
a
b
P1 P2
c
aRear part of the user interface
bFront part of the user interface
cUse rippers to notch the part for the wiring to pass through
4. Reinstallthefaceplateontothewallplate.Firstbeginttingfromtheclipsatthebottom.
1

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HXY48TAVJU EDUS392021-F18
C: 4P616151-1
INFORMATION
If next to the standard remote controller the optional remote controller is installed as well:
 Connect the electrical wires of both remote controllers in the same way like described above.
 Select a master and a slave remote controller by switching the SS1 selector switch.
SS
M
PCB
SS1 SSlave
MMaster
Only the remote controller set as master can work as room thermostat.
How to connect for multi unit
INFORMATION
Formultipleunitcontrol,connecttheremotecontrollertotheunitasinstructedabove.Forallotherunitstobecontrolledbythiscontroller
everynextunithastobeconnectedasshowninthegurebelow(meaning:makeaconnectionfromP1ofthepreviousunittoP1ofthe
nextunit,andmakeaconnectionfromP2ofthepreviousunittoP2ofthenextunit,andsoon...).
P1 P1 P1P2
P1 P2
P2 P2
Limitation: 16 indoor units