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Green Storage WB Range
Installation & Maintenance Instructions
SPECIFICATION DETAILS
The unvented cylinder is made from Duplex stainless steel for excellent corrosion
resistance. The cylinder has a strong rust-proofed steel case and is highly insulated
with environmentally-friendly foam. Further details are below.
MATERIALS
• Inner shell – Duplex stainless steel
• Coil – 22mm diameter stainless steel
• Bosses – Stainless steel
• Polyurethane CFC- and HCFC-free foam insulation. This insulation has an Ozone
Depletion Potential of Zero and a Global Warming Potential of 3.1.
• Casing – galvanized steel, durable finish
• Anode – none fitted/required
All cylinders are welded using our advanced welding production methods, under a
controlled oxygen purged process, to maximize the corrosion resistant qualities of the
high-grade Duplex stainless steel. Every cylinder is checked using 15 bar pressure
testing.
IMMERSION HEATER
• 13/4" BSP parallel threaded head
• Long life incoloy sheathed low noise element and thermostat pocket
• Brazed construction
• Combined thermostat and safety cut-out
• Element rating 3kW at 230V A/C
GUARANTEE
The inner cylinder carries a 25-year guarantee against faulty materials or
manufacture. All parts supplied with the cylinder carry a 5-year guarantee. All
guarantees must be registered at:
https://www.worcester-bosch.co.uk/support/guarantees
FLOW RATES
Our cylinders are renowned for their fast flow rates. The graph below illustrates the
speed at which hot water can distributed reliably throughout the home.
8
90
80
70
60
50
40
30
20
10
0
2
2.5
3
Water Pressure (Bar)
Table 3: Pressure specifications
Maximum Inlet Water Pressure
Operating Pressure/Maximum Design Pressure
Expansion Valve Opening Pressure
Expansion Vessel Charge Pressure
Maximum Operating Pressure
Opening Pressure of T & P Valve
Opening Temperature of T & P Valve
Maximum Pressure on Primary Circuit (Indirect / Solar Coil)
Table 4: Immersion element specifications
Element Rating
Thread Type
Fuse Requirement
Control Thermostat for Element Temperature Range
High Limit Thermostat for Element Temperature Set Point 85˚C
3.5
4
4.5
5
12.0 bar
3.0 bar
6.0 bar
3.0 bar
7.0 bar
7.0 bar
90˚C
3.5 bar
3kW 230V
13/4" BSP
13A via Double Pole Switch
45˚C - 65˚C
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