Installation manual

29 ©ESP Ltd. Sept 2008
The significant benefits to be gained from the installation of an Unvented Hot
Water Storage System can be divided into two categories; benefits to the Speci-
fier/Installer and benefits to the householder.
Specifier / Installer Benefits
• Choice of location - unit can be installed virtually anywhere within the build-
ing structure allowing greater flexibility of house and system design Reduces
costs.
• Superior performance - ensures constant high flow rates at all outlets and al-
lows rapid filling of baths.
• No Cold Water Storage Cistern - Reduces pipework. No requirement for tank
stand or pipework/tank insulation - reduces costs. Roof space can be utilised
for additional living accommodation.
• Balanced pressures - far wider choice of sophisticated continental style taps
and showers can be used.
• Quicker to install - reduces pipework and installation costs.
• Reduces noise in system - no filling of Cold Water Storage Cistern.
• Smaller diameter pipework can be used - reduces costs.
• Eliminates risk of freezing and burst pipes in roof space.
• No shower pump required - reduces costs.
• Eliminates risk of contamination - no Cold Water Storage Cistern in roof
space.
• Superior performance and flow rates - ideal for multi-bathroom dwellings.
• Energy efficient - reduces fuel costs.
• Ease of maintenance - no access to roof space required.
• Frees roof space - can be utilised for loft conversions.
 Aesthetic looks - „white goods‟ casing
Householder Benefits
• Superior performance - ensures constant high flow rates at all outlets and
allows rapid filling of baths.
• Balanced pressures - far wider choice of continental style taps and showers
can be used.
• Reduces noise in system - no filling of cold water storage cistern.
• Eliminates risk of freezing and burst pipes in roof space.
• Eliminates risk of contamination - no cold water storage cistern in roof
space.
• Frees roof space - can be utilised for loft conversions.
• Energy efficient - reduces fuel costs.
• Aesthetic looks - „white goods‟ casing.
Choosing an Unvented System
From the early Unvented Systems of the seventies, the continued growth of
installations in the UK has now produced the sophisticated, high performance
units demanded by today‟s householder and, the availability of Unvented Sys-
tems from manufacturers in the UK, Europe, South Africa and North Amer-
ica, now offers the specifier/installer an unparalleled choice to suit virtually
any application.
Manufactured from either copper, glass-lined steel or stainless steel, almost
all of the Unvented Systems available in the UK are supplied with a white
goods easy clean finish. Using inlet pressures ranging from 1.5 Bar to 3.5 Bar,
depending on the relevant manufacturer‟s specification, and available in both
direct and indirect form, today‟s Unvented Systems can be divided into three
main categories; Bubble-Top unit, External Expansion units and Direct Gas or
Oil Fired units.
UNVENTED HOT WATER STORAGE SYSTEMS AND CONTROLS