Technical data

20
The Hybrid System must be installed and serviced only
by a competent person in accordance with the current
IEE Regulations, Building Regulations, Building Standards
(Scotland) (Consolidation), Building Regulations (Northern
Ireland), local water byelaws, Health & Safety Document
63S (The Electricity at Work Regulations 1989), IS 813
(Eire) and other local requirements.
The relevant Standards should be followed, including:
BS7074:1: Code of practice for domestic and hot
water supply
BS EN:12828: Central heating for domestic premises
BS7593: Treatment of water in domestic hot water central
heating systems
BS EN 14511: Requirements for heat pumps for
space heating
BS EN 378: Safety and environmental requirements for
heat pumps
The Health and Safety at Work Act 1974
The Management of Health and Safety at Work
Regulations 1999
The Construction (Health, Safety and Welfare)
Regulations 1996
The Construction (Design and Management)
Regulations 1994
The Lifting Operations and Lifting Equipment
Regulations 1998
Where no specific instruction is given, reference should be
made to the relevant codes of practice
Potable water: all seals, joints, compounds (including flux
and solder) and components used as part of the secondary
domestic water system must be approved for use with
potable water supplies
This is to certify that the above ranges of products
manufactured by Bosch Thermotechnology Ltd. have been
tested and found to comply with:
•
the requirements of the (Water Fittings) Regulations 1999
for England and Wales, the Water Byelaws 2000, Scotland
and the Water Regulations Northern Ireland
•
the requirements of the UK Building Regulations:
The Building Regulations 1991 (England & Wales)
Requirements G3, L1 and Regulation 7.
The Building Standards (Scotland) Regulations 1990.
Regulation 10 (B2), 22 (J3.3a and J3.4), 27 and 28
(P2.6 and P3).
The Building Regulations (Northern Ireland) 2000.
Installation and maintenance continued
Control strategy: cost optimised
With the cost-optimised mode, the system control decides
on the basis of current energy prices. Rising gas prices
result in longer operation of the heat pump, whilst rising
electricity prices result in longer operation of the boiler.
The cost ratio is the difference between Gross electricity
and gas prices converted to Nett.
Example:
•
Cost of electricity: 14p/kW
•
Cost of gas: 4.5p/kWh
Cost ratio (net): (14/14.5) x 0.902 = 2.8
This is the ratio which must be inputted to the
system controller.
The energy:price ratio for electricity and fossil fuel must be
adjusted regularly to the actual price ratios.
The Installation, Commissioning and Servicing Instruction
Manual includes the weighting factors for different
electricity and gas prices.
Spare parts
Only genuine Worcester, Bosch Group spare
parts can be used with these products.
Visit your nearest Profile stockist or visit
www.worcester-bosch.co.uk/spares
Building Regulations and standards