Stuart Aquastor Sigma SAS 500

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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 500 litre indirect cylinder with external expansion

27.0 kW high performance finned coil

Duplex stainless steel inner cylinder

Resources & Downloads

Stuart Aquastor Sigma Data Sheet

Stuart Aquastor Sigma Installation Guide

Stuart Aquastor Sigma Dimensional

Technical Specification

Product Code	44790
General
Warranty	Internal cylinder 25 years, all other components 2 years
WRAS approval	1410052
Approvals	BBA, CE, WRAS, KIWA, ISO, WRC
Features
Capacity - total	500 litres
Coils	Single
Coil rating	27.0 kW
ErP class	B
External expansion vessel size	100 litres
Performance
Standing heat loss @ 65 ^oC	1.95 kW/24h
Reheat time after 70% draw off	55 mins
Time to heat from cold to 65 ^oC	71 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	2000 mm
Weight - including fittings	78 Kg
Weight - filled	578 Kg
GTIN 13 DIGIT	5050400447900

Compare Models

Description	Part Number	Capacity - total	Width	Height
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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