TSM Thermosiphon Solar Water Heater

Overview

TSM is Solimpeks' natural-circulation solar water heater: fluid heated in the collector rises into the horizontal tank by thermosiphon effect, so no pump, controller or electrical supply is needed for the solar loop. The store itself is unpressurised, while the domestic water stays pressurised because it flows through an AISI 316L stainless steel flexible coil inside the tank, preserving mains pressure and hygiene at the tap.TSM is Motiontec Energy's natural-circulation solar water heater: fluid heated in the collector rises into the horizontal tank by thermosiphon effect, so no pump, controller or electrical supply is needed for the solar loop. The store itself is unpressurised, while the domestic water stays pressurised because it flows through an AISI 316L stainless steel flexible coil inside the tank, preserving mains pressure and hygiene at the tap.

Five models are offered, rated at 120, 135, 170, 245 and 305 litres per day. Each is matched to a Wunder ALS selective collector: ALS 1809 on the TSM 120, ALS 2110 on the 150, ALS 2512 on the 200 and two ALS 2110 panels on the 300, all with highly selective aluminium absorbers at 95% absorptance and 3% emittance, low-iron tempered glass and rock wool insulation. Published solar fractions are 84, 80, 81 and 82%.

The stainless coil provides 3.8 m² of surface (4 m² on the TSM 350) and holds 12 litres, and because domestic water never stands in the store there is no magnesium anode to inspect or replace, making the system essentially maintenance free. Tanks carry 50 mm polyurethane insulation inside a static-painted galvanised shell, weigh 48 to 100 kg and are rated to 6 bar and 95 °C. The range is Solar Keymark certified with a five-year warranty.