Stuart

Stuart Aquastor Sigma SAS 400

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Unvented Cylinder - Indirect

The Aquastor Sigma range of unvented indirect hot water cylinders are ideal for high demand applications and offer an all stainless steel construction to the highest standards, with a maximum operating pressure of 4.5 bar.
The Sigma range has been designed with higher demand flow rates in mind and features 1 “ BSP connections.
Available in a range of cylinder sizes with an ErP B classification.
• 1 " hot and cold water connections
• ½" temperature and pressure relief valve
• 4.5 bar maximum operating pressure
• 3 kW immersion heater
• 22 mm high performance heating coil

Key Features
  • Unvented 400 litre indirect cylinder with external expansion
  • 27.0 kW high performance finned coil
  • Duplex stainless steel inner cylinder
Technical Specification
Product Code 44856
Guarantee Internal cylinder 25 years, all other components 2 years
WRAS status Approved Product
WRAS approval 1410052
Approvals BBA, CE, WRAS, KIWA, ISO, WRC
Capacity - total (litres) 400

Coil rating (kW)

27.0 kW

ErP class

B

Connection - DHW 1" BSP M
Connection - primary 22 mm
External expansion vessel size (litres) 80 litres
Inner cylinder Duplex stainless steel

Power supply (VAC/PH/HZ)

230 Va.c. / 1 / 50Hz

Power consumption (Watts)

3 kW

Width (mm) 755
Depth (mm) 755
Height (mm) 1640
Weight - including fittings (Kg) 68
Weight - filled (Kg) 468
GTIN 13 DIGIT 5050400448563
Compare Models
Description Part Number Capacity - total (litres) Width (mm) Height (mm)
Stuart Aquastor Sigma SAS 305 44789 305 576 2028
Stuart Aquastor Sigma SAS 400 44856 400 755 1640
Stuart Aquastor Sigma SAS 500 44790 500 755 2000
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