LG Air-to-Water Heat Pump Monobloc 48,000 BTU

High-Performance Air-to-Water Heat Pump Monobloc System

Upgrade your residential hydronic heating and cooling infrastructure with the LG Air-to-Water Heat Pump Monobloc (Model KPHTC481M), engineered to deliver robust thermal comfort, reliable climate control, and high energy efficiency. Delivering a nominal capacity of 48,000 Btu/h for both heating and cooling operations, this advanced monobloc unit integrates a hermetic sealed scroll compressor, R32 refrigerant with low Global Warming Potential (GWP 675), and an intelligent inverter-driven architecture to maintain ideal indoor conditions across varying outdoor environments. Designed for streamlined outdoor installation, the KPHTC481M eliminates the need for indoor refrigerant piping while providing exceptional coefficient of performance ratings, including a COP of up to 4.80 in heating mode and an EER of 14.73 in cooling mode.

Equipped with a built-in canned hot water circulation pump driven by a brushless DC (BLDC) motor, stainless steel water strainer, pressure sensors, and comprehensive safety controls, the KPHTC481M offers a complete, self-contained hydronic heating and cooling solution.

Key Benefits

• High Thermal Capacity & Efficiency – Delivers 48,000 Btu/h nominal heating and cooling capacity with a high heating COP of up to 4.80 and a cooling EER of 14.73.
• Eco-Friendly R32 Refrigerant – Utilizes advanced R32 refrigerant featuring a lower Global Warming Potential (GWP 675) to support high environmental sustainability.
• Integrated Canned Water Circulator – Features a high-efficiency BLDC motor-driven water circulation pump (140W max power input) and an integrated stainless steel mesh water strainer (30 mesh, 1-3/16" max particle size).
• Advanced Hydronic Protection – Includes an integrated pressure sensor (0–290 psi range), flow sensor (1.3–21.1 GPM range), and a 43.5 psi pressure relief valve to ensure safe water loop operation.
• Flexible Water Operating Range – Supports cooling mode leaving water temperatures from 41°F to 80.6°F and heating mode leaving water temperatures from 59°F to 149°F.
• Low Noise Operation Modes – Offers multi-stage sound reduction options including Daytime Max, Rated, and Low Noise settings, achieving sound pressure levels as low as 49 dB(A).
• Robust Scroll Compressor & Dual Fans – Powered by a hermetic sealed scroll compressor and dual propeller fans driven by BLDC motors for optimized airflow and reliable heat exchange.

Designed for Complete Hydronic Comfort

The LG KPHTC481M Monobloc system is engineered to manage whole-home space conditioning and domestic hot water integration efficiently. With precise sensor feedback monitoring water flow rates (rated at 12.15 GPM) and leaving water temperatures, the system dynamically modulates performance to match real-time thermal loads.

What’s Included

• LG 48,000 Btu/h Air-to-Water Heat Pump Monobloc Unit (KPHTC481M)
• Built-In Canned Water Circulation Pump with BLDC Motor
• Stainless Steel Water Strainer (30 Mesh)
• Integrated Water Pressure Sensor & Flow Sensor
• Pressure Relief Valve (43.5 PSI)
• Drain Nipples and Hose Components
• Installation Guide & Technical Documentation

Requirements & Considerations

• Electrical Requirements – Requires a dedicated single-phase 220-240V, 60 Hz power supply (acceptable voltage range: 198V–264V) with a 40A circuit breaker. All installations must include an Earth Leakage Circuit Breaker (ELCB).
• Running Currents – Peak control running current is 24.0A, with rated running currents of 14.4A for cooling and 12.9A for heating.
• Water Piping Connections – Features 1-inch Male Pipe Thread (tapered) inlet and outlet water connections.
• Dimensions & Weight – Net unit dimensions measure 48-51/64" W x 54-21/64" H x 12-63/64" D with a net weight of 262.6 lbs (shipping dimensions: 53-45/64" W x 60-7/64" H x 17-41/64" D; shipping weight: 295.6 lbs).