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TECHNICAL DATA & INSTALLATION
INSTRUCTIONS FOR DIRECT &
INDIRECT UNVENTED WATER HEATERS
WITH EXTERNAL EXPANSION TANK
Your vessel is made by one of the worlds leading unvented water heater
manufacturers.
Your water heater is made from Duplex Stainless Steel, which is one
of the toughest and best grades of steel currently available.
Each unit has been individually tested and inspected to industry
standard.
Your water heater uses advances in technology and innovative
techniques to provide you with a high performance water heater at
the best price possible.
No other type of water heater can provide all of the benefits that
can be achieved from unvented units such as this model of
Unvented Water Heater
.
IMPORTANT NOTICE FOR INSTALLATION
READ THESE INSTALLATION AND MAINTENANCE
INSTRUCTIONS BEFORE COMMENCING
UNVENTED CYLINDERS ARE DESIGNED TO BS STANDARD AND
INSTALLED TO RELEVANT BUILDING REGULATIONS
THE RELEVANT REGULATIONS ARE
ENGLAND & WALES – BUILDING REGULATION G3
SCOTLAND – TECHNICAL STANDARD P3
NORTHERN IRELAND – BUILDING REGULATION P5
AFTER INSTALLATION THE BENCHMARK LOG BOOK MUST BE
COMPLETED AND LEFT ALONG WITH THESE INSTRUCTIONS WITH
THE HOUSEHOLDER FOR FUTURE REFERENCE.
INSTALLATION INSTRUCTION MANUAL
TO BE LEFT WITH THE UNIT
CONTENTS
SPECIFIERS GUIDE
The law and unvented
p3
The benefits of unvented systems
p3
The benefits of unvented systems
p3
Standard energy losses
p4
What is supplied with
your vessel
?
p4
INSTALLATION INSTRUCTIONS
Siting the unit
p4
Check water pressure & flow rates
p4
Connecting the water supply
p5
Cold water valve
p5
Drain tap
p5
Pipework to taps
p5
Secondary circulation
p5
Wiring
p7
Fitting immersion heaters
p7
Fitting the thermal cut out & primary connections
p7
Tundish
p8
Commissioning the unit
p8
External expansion tank
p8
Scale
p8
Draining
p8
Discharge pipework
p8
G3 Requirement
p9
Problem solving
p10
Spares
p10
Part component references
p10
Guarantee
p11
DIAGRAMS
Dimensional data for DH / IDH
range of water heaters
p3
Typical installation of a DH tank
p5
Typical installation of a IDH tank
p5
Secondary circulation connection
p6
2 x 2 port (S-plan) valve system
p6
2 port valve + 3 port mid position valve (y-plan)
p7
Immersion heater
p7
Schematic discharge pipe arrangement
p8
Содержание unvented water heater
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