INSTALLING THE LWSS UNIT
Choose a flat even surface. Wooden bearers are not essential as the unit sits on a ring stand. The unit
must be installed vertically.
Please install in an area that will be accessible in the future. When first fixing take into account that
the connections and controls will be front facing to facilitate access.
Check that the floor will support the unit when it is full of water. See page 14 for weights.
COLD FEED
Minimum mains pipework of 25mm MDPE or 22mm copper is advised. If 15mm copper or 1/2" lead is
the only mains feed then the decision to install rests with the installer or specifier of the product. Flow
rates will be compromised, even at appropriate pressures, ensure that you have at least 18 litres per
minute at the bath tap. Maximum inlet pressure is 12 bar.
If multiple bath filling or showering is required, mains feed may need to be 32mm MDPE or 28mm copper.
The unit operates at 3 bar and pressures from 2 bar upwards are suitable. Lower pressure will result in
a fall in flow rate. A flow rate of 20 litres per minute is a minimum requirement for single bath
applications and must rise proportionately for greater demands.
1
PRESSURE AND
TEMPERATURE
RELIEF VALVE
INSULATION
COLD MAINS
VIA GROUPSET
HOT DOMESTIC
WATER
IMMERSION
HEATERS
EXPANSION
VESSEL
(SUPPLIED LOOSE)
APPLIED ENERGY PRODUCTS LTD
STAINLESS STEEL UNVENTED HOT WATER STORAGE UNITS
PRESSURE AND
TEMPERATURE
RELIEF VALVE
INSULATION
COLD MAINS
VIA GROUPSET
HOT DOMESTIC
WATER
PRIMARY
TAPPINGS
DUAL
THERMOSTAT
IMMERSION
HEATER
EXPANSION
VESSEL
(SUPPLIED LOOSE)
INDIRECT
DIRECT
Please read the following carefully before installation of the product. You should be competent to install
the unvented system as defined by the regulations. Special attention must be paid to maintenance and
service.
Please keep the unit packaged until you are ready to commence installation. Store the unit in a dry area,
keep it vertical and ensure that all safety components are kept in the box.
IT IS A REQUIREMENT THAT THIS UNIT IS SERVICED AND MAINTAINED ANNUALLY – THE BENCHMARK
LOG BOOK MUST BE COMPLETED AND UPDATED. FAILURE TO DO SO WILL INVALIDATE GUARANTEES.
THE DIRECT & INDIRECT UNITS
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