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
General
Guarantee Internal cylinder 25 years, all other components 2 years
WRAS approval 1410052
Approvals BBA, CE, WRAS, KIWA, ISO, WRC
Features
Capacity - total 400 litres
Coils Single
Coil rating

27.0 kW

ErP class B
External expansion vessel size 80 litres
Performance
Standing heat loss @ 65 oC 1.73 kW/24h
Reheat time after 70% draw off 40 mins
Time to heat from cold to 65 oC 57 mins
Maximum operating pressure 4.5 bar
Materials
Inner cylinder Duplex stainless steel
Outer casing P200 Plastisol
Connections
Connection - cold water feed 1 " BSP M
Connection - DHW 1" BSP M
Connection - primary 22 mm
Electrical
Power supply (Vac/Ph/Hz) 230 V a.c. / 1 / 50 Hz
Power consumption 3 kW
Physical
Width 755 mm
Depth 755 mm
Height 1640 mm
Weight - including fittings 68 Kg
Weight - filled 468 Kg
GTIN 13 DIGIT 5050400448563
Compare Models
Description Part Number Capacity - total Width Height
Stuart Aquastor Sigma SAS 305 44789 305 litres 576 mm 2028 mm
Stuart Aquastor Sigma SAS 400 44856 400 litres 755 mm 1640 mm
Stuart Aquastor Sigma SAS 500 44790 500 litres 755 mm 2000 mm
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