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