NH160PHXEA

Engineer's overview

The Samsung NH160PHXEA serves as the indoor Hydro Unit for the Samsung EHS TDM (Time Division Multi) split air-to-water heat pump range. With a nominal capacity of 16kW, this unit is engineered for larger domestic properties requiring significant heating loads. As a split system, the NH160PHXEA connects to an outdoor compressor unit via refrigerant pipework, utilizing R410A refrigerant which has a Global Warming Potential (GWP) of 1975. Performance is managed by an inverter-driven compressor, allowing the system to modulate output based on demand. The unit achieves a Coefficient of Performance (COP) of 4.55 at A7/W35 conditions, though actual efficiency varies based on system design and flow temperatures. It is capable of producing a maximum flow temperature of 55°C, making it suitable for well-insulated properties with correctly sized radiators or underfloor heating. The system remains operational in extreme conditions, with a minimum outdoor temperature rating of -20°C. Hydraulic integration requires careful attention to flow rates. The NH160PHXEA requires a minimum water flow rate of 16 litres per minute (LPM) to prevent flow switch errors. If the flow rate drops below this threshold for more than 10 seconds while the pump signal is active, the unit will trigger a 911 or 912 fault code. Installers should ensure the primary pipework and pump settings are configured to maintain this volume. Control is handled via a dedicated Wired Remote Controller, which supports weather compensation. This feature adjusts the flow temperature automatically based on the external ambient temperature, optimizing efficiency by running the heat pump at the lowest possible temperature required to meet the heat loss of the building. The unit is compatible with Samsung range of DHW tanks, including the NH200WHXEA and NH300WHXEA models. For maintenance and troubleshooting, the NH160PHXEA features a comprehensive self-diagnostic system. Common issues often relate to thermistor faults, such as codes 901 (Water Inlet) or 902 (Water Outlet), which typically require checking resistance values (10kohm at 24°C for the hydro unit). Annual servicing is mandatory every 12 months to maintain the warranty, which must be registered with Samsung. Engineers must be F-Gas certified to work on the refrigerant circuit of this split system.