Specifications

SPECIFICATIONS
Element – Long-life removable Incoloy 800 sheathed
element, rated 3.0kW @ 240V. Direct models are fitted
with two 3.0kW immersion heaters as standard.
Outer casing – A combination of resilient thermoplastic
mouldings and plastic coated corrosion proofed
steel sheet.
Thermal insulation – CFC/HCFC free (ODP ZERO) fire
retardant expanded polyurethane. 50mm thickness.
Inner container – High grade stainless steel, pressure
tested to 15 bar.
Primary coil – 22mm diameter stainless steel.
Coil-in-coil design for improved performance.
Thermostat – Element thermostat adjustable from
10°C to 70°C.
Safety features – Temperature and pressure relief valve,
factory set to operate at 10 bar and 90°C. High limit
thermostat, factory set at 80°C. Direct models – Manually
re-settable cut-out on heating element operates at 80°C.
Indirect models – Must be wired in series with the
supplied two-port motorised valve to provide primary
over temperature protection.
Anode – None required.
Approvals – KIWA approved for water regulations
and building regulation G3. Manufactured in the
UK in a BS EN ISO 9001:2008 registered factory.
CE marked for compliance with LVD, EMC & pressure
equipment directives.
Installation
Main unvented cylinders must be installed by a competent
installer in accordance with local regulations:
England & Wales – Building regulation G3.
Scotland – Technical standards P3.
N. Ireland – Building regulation P5.
Fixing – Feet on bottom moulding for floor mounting.
Plumbing connections – Inlet/Outlet, 22mm compression
fittings / 3/4” BSP parallel thread.
Primary coil – 22mm compression fittings / 3/4” BSP
parallel thread.
Temperature and pressure relief valve – 15mm
compression outlet.
Cold water control – Integrated cold water control set
comprising pressure reducing valve and strainer – factory
set at 3.5 bar, expansion relief valve – factory set at 6 bar
and check valve. 22mm compression fittings.
Mains pressure – Min 1.5 bar, Max 16 bar. A 2-port
motorised valve is supplied with indirect models.
Flow rates – Up to 55 litres per minute @ 6 bar pressure.
Operating pressure – 3.5 bar.
Expansion relief valve pressure – 6.0 bar.
Operating temperature – Recommended 60°C.
Adjustable 10-70°C.
Water expansion – Remote expansion vessel
12 litre vessel supplied with 120 and 150 litre models.
18 litre vessel supplied with 170 and 210 litre models.
24 litre vessel supplied with 250 and 300 litre models.
Minimum water supply requirements – Recommended
minimum supply pressure – 1.5 bar/20 l/min flow rate.
If there are any doubts about water supply pressure or flow
rates, please contact our Specification Advice Team
to discuss on 0845 026 4620.
Secondary circulation – Via 22 x 22 x 15mm swept tee,
which should be fitted to the inlet pipework. Secondary
Circulation is not recommended for direct units being used
with off-peak electricity tariffs.
Pressure testing – Units are tested to 15 bar.
Tundish – 15mm compression inlet and 22mm
compression outlet.
Electrical
Indirect models – Controls should be wired to the boiler,
programmer etc., in accordance with the control scheme
being used.
Direct models – Connection is direct to terminals in the
immersion heater which must be permanently connected to
the supply through a double-pole lined isolating switch with
a minimum breaking capacity of 13A.
All electrical wiring must conform to the latest IEE
Wiring Regulations.
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