Samsung MOS‑T1 2‑Zone Thermistor Kit

The Samsung MOS‑T1 2‑Zone Kit is a dedicated thermistor and sensor kit that enables accurate control of two separate heating zones with different temperatures on compatible Samsung EHS systems.

Purpose

• 2‑zone enabling kit: Supplies the extra temperature sensors required so an EHS system can manage two independent zones or two thermostats with different setpoints from a single heat pump.
• For mixed‑temperature systems: Commonly used where a mixing valve is added to create a low‑temperature circuit (such as underfloor heating) alongside a higher‑temperature circuit (such as radiators).

Key Features

• Thermistor‑based sensing: Uses NTC temperature sensors to provide accurate pipe or zone temperature feedback to the Samsung EHS controller for each circuit.
• Stable 2‑zone control: Ensures the controller can correctly manage flow temperatures, valve positions and pump operation for both heating zones.
• Required for true 2‑zone operation: Official documentation specifies that to properly control two zones or two thermostats with different temperature settings, the 2‑Zone Thermistor Kit MOS‑T1 must be installed.

Typical Kit Contents

• Temperature sensors: NTC thermistors intended to be mounted on the additional zone’s flow/return or designated pipe positions.
• Pre‑wired leads: Cables with connectors for straightforward connection to the indoor unit or controller PCB terminals.
• Fixings and clips: Pipe clips or straps to secure sensors in the correct location for reliable readings.

Applications

• UFH plus radiators: Systems combining a low‑temperature underfloor heating zone with a higher‑temperature radiator circuit on one Samsung EHS unit.
• Retrofit mixing‑valve systems: Installations where a mixing valve is added to an existing EHS system; MOS‑T1 provides the additional feedback needed for proper controller operation.
• Accurate dual‑zone control: Any project requiring two genuinely independent heating zones with correct temperature feedback, rather than relying only on room thermostats.