Tml WP1X01000R Kettle lt. 1000 AISI 316L stainless steel for heat pump with a rigid insulation fixed coil heat exchanger

Heat Pump DHW Storage Tank 931 Litres in AISI 316L Stainless Steel – WP1X01000R

The WP1X01000R is a vertical domestic hot water (DHW) storage tank with a capacity of 931 litres, manufactured in AISI 316L stainless steel (1.4404) by TML Industrie Loddo and specifically designed for DHW production and storage with heat pump systems. Equipped with a fixed double parallel spiral coil heat exchanger offering 6.0 m² of exchange surface, it delivers outstanding thermal performance even at the low primary temperatures typical of heat pump operation.

Technical Specifications – WP1X01000R

• Tank material: AISI 316L stainless steel (1.4404) – Pickling and passivation inside and out
• Max pressure / Max temperature (domestic side): 6 bar / 95°C
• Actual capacity: 931 litres
• Heat exchanger: 6.0 m² – Fixed double parallel spiral coil – max 10 bar / 95°C
• Cathodic protection: Replaceable magnesium anode
• Insulation: Rigid PU foam + PVC, thickness 100 mm (Fire class B3 DIN 4102)
• ErP: Class C – Heat loss: 110.5 W
• Dimensions: Ø 790 mm × Height 2110 mm
• Weight: 188 kg
• Electric heater connection: 1½" fitting (heater not included)
• Warranty: 5 years

Double Parallel Spiral Coil Technology – The Competitive Advantage

The double parallel spiral coil maximises the contact surface in the coldest zones of the tank, reducing heat pump start/stop cycles and extending system lifespan. This proprietary technology significantly reduces the number of heat pump start/stop cycles, extending its service life and improving the overall coefficient of performance (COP) of the system.

Applications and Compatibility

Ideal for residential systems with air-to-water or water-to-water heat pumps. Also compatible with conventional gas boilers as backup. Pre-fitted for DHW recirculation, temperature sensor, thermostat, and electric backup heater to ensure continuous service even when the primary source is unavailable.

Standards and Certifications

The WP1X01000R complies with: PED Directive 2014/68/EU (Art. 4 Par. 3 – pressure equipment), Italian D.M. 6 April 2004 N.174 (material suitability for contact with drinking water), ErP Directive 2009/125/EC (energy-related products).