LG ARNH423K3A4 Hydro Kit High Temperature 42 MBh Indoor Unit Owner’s Manual

June 9, 2024
LG

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ARNH423K3A4

Hydro Kit High Temperature

42 MBh Indoor Unit

Performance:

Rated Heated Capacity (Btu/h) 47000
Entering Water Temperature Range (°F) 50 – 158
Leaving Water Temperature Range (°F) 86 – 176

Rated capacity is certified under AHRI Standard 1230. Ratings are subject to change without notice. Current certified ratings are available at www.ahridirectory.org.

Electrical:

Power Supply (V/Hz/Ø)¹ 208-230/60/1
Power Input (kW) 2.3
MOP (A) 25
MCA (A) 18.2
Rated Amps (A) 12

MOP — Maximum Overcurrent Protection           MCA — Minimum Circuit Ampacity

Piping:

Liquid Line (inches, O.D.) 3/8 Braze
Vapor Line (inches, O.D.) 5/8 Braze
Water Inlet / Outlet (inches, O.D.) 1, Male Pipe Thread

Standard Features:

  • High temperature water heating
  • Domestic water heating2
  • Factory mounted inlet/outlet water temperature sensors
  • Wi-Fi compatible with optional module
  • Factory mounted internal flow switch
  • Third-party thermostat interface3,4
  • Group control5
  • Remote on/off site monitoring capability via the internet6

Water Flow Control Options:

  • Water Pump On / Off Interlock
  • 208V 3-Way Diverting Valve3,7,8

Included Accessories:

  • Hot Water Tank Temp Sensor with 32-foot Communication Cable9,10
  • 1 /2″ Male Pipe Thread (MPT) Hot Water Tank Sensor Well9
  • Remote Wall Mounted Hydro Kit Controller with 32-foot Communication Cable9,11
  • 1″ Female Pipe Thread (FPT) 50 Mesh Inlet Strainer9

Optional Accessories:

Dry Contact ­- PDRYCB320 / PDRYCB100
Remote Temperature Sensor -­ ZRTBS019,12
Group Control Cable Kit ­- PZCWRCG35
Extension Cable -­ PZCWRC111
LG MultiSITE™ Communications Manager -­ PBACNBTR0A
AC Smart™ 5 ­- PACS5A000
ACP 5 -­ PACP5A000
ACP LonWorks® ­- PLNWKB100
Wi-Fi Module ­- PWFMDD200

Unit Data:

Refrigerant Type (Primary / Secondary) R410A / R134A
Refrigerant Control EEV
Sound Pressure dB(A)13 Heating 44
Net Weight (lbs.) 189.6
Shipping Weight (lbs.) 207.2
Heat Rejected to Equip. Rm. (Btu/h) Negligible
Factory Charge (R134A, lbs.)14 5.07

Heat Exchanger:

Heat Exchanger Refrigerant to Water
Heat Exchanger Type Brazed Plate
Rated Water Flow (GPM) 5.2
Rated Pressure Drop (ft-wg)15 1.7
Flow Range (GPM) 5.2 to 10.6
Water Side Volume (US Gallons) 0.58
Water Side Design Pressure (psig) 640

Compressor:

Compressor Type x Quantity Twin Rotary Inverter x 1

Notes:

  1. Voltage fluctuation tolerance is ±10%.
  2. Requires the use of an indirect water storage tank.
  3. Field provided and mounted.
  4. Field-provided thermostat must be a line voltage (208V) heating only thermostat. Heating setpoint, deadband, and manual restart functions provided by Hydro Kit controller are not available with use of a third-party thermostat. Cannot be used in conjunction with remote temperature sensor.
  5. Group Control Cable Kit (PZCWRCG3) required and sold separately.
  6. Monitoring capability available using a MultiSITE Communication Manager, AC Smart 5, or ACP 5 (sold separately), or a BMS system integration gateway (sold separately). Requires a field provided LAN/internet connection or BMS system provided by others.
  7. Not required on dedicated domestic water heating applications.
  8. Alternates flow between comfort heating equipment and water heating tank.
  9. Field mounted.
  10. Cannot field splice.
  11. Cannot field splice. To extend cable length, use Extension Cable (PZCWRC1), sold separately.
  12. Requires the installation of the Hydro Kit controller. Does not apply when used in conjunction with a third-party thermostat.
  13. Sound pressure levels tested in an anechoic chamber in accordance with ISO Standard 3475.
  14. Internal second stage refrigerant circuit.
  15. Water only (no antifreeze).

(Unit: Inch)

LG ARNH423K3A4 Hydro Kit High Temperature 42 MBh Indoor
A2

Notes:

  1. Unit must be installed in compliance with the installation manual.
  2. Unit must be grounded in accordance with the local or state regulations and applicable national codes.
  3. All field-supplied electrical components and materials must comply with the local, state, and national codes.
3D VIEW

LG ARNH423K3A4 Hydro Kit High Temperature 42 MBh Indoor
A3

LG ARNH423K3A4 Hydro Kit High Temperature 42 MBh Indoor
A4

  1. Power Supply Wiring
    Routing Hole (01-3/16)

  2. Communications Cable
    Routing Hole (01-3/16)

  3. Vapor Piping

  4. Liquid Piping

  5. Water Outlet

  6. Water Inlet

For continual product development, LG reserves the right to change specifications without notice.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG Life’s Good” is a registered trademark of LG Corp. /www.lghvac.com

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SB_HydroKit HighHeat _ARNH423K3A4_2023_03_10_092044

Documents / Resources

| LG ARNH423K3A4 Hydro Kit High Temperature 42 MBh Indoor Unit [pdf] Owner's Manual
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References

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