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Regulations | 7
6 720 811 270 (2015/04)AGS10-2, AGS10E-2, AGS20-2, AGS50-2
3 Regulations
Practical work is subject to currently applicable technical rules.
Observe all standards, guidelines and requirements applicable to the
installation and operation of the system in your country and region.
Modified regulations or supplements are also valid at the time of
installation and must be observed.
Technical regulations applicable in the U.K. for the installation of
thermal solar heating systems
Electrical connection:
Current IEE wiring regulations
Connection of solar thermal systems:
EN 12976: Thermal solar systems and components (factory made
systems)
BS5918: Latest version: Solar heating systems for domestic hot
water.
Installation and fittings of hot water heaters:
BS5546:2006 Specification for installation of hot water supplies
for domestic purposes, using gasfired appliances of rated input not
exceeding 70kW.
BS6700:2006 Specifications for design, installation testing and
maintenance of services supplying water for domestic use within
buildings and their curtilages.
Installations should be made in accordance to the relevant MCS Solar
standards if the homeowner is applying for RHI
4 Installing pipework
4.1 General information regarding pipework
NOTICE: System damage through faulty parts.
Only use materials which are resistant to glycol,
pressure and heat (at least up to 150 °C).
Do not use plastic pipes (e.g. polyethylene pipes) or
galvanised pipework.
We recommend carrying out a pipe network analysis to
determine pipework sizing requirements. Basic design
estimates can be made using Tab. 5.
If there are many additional points of resistance
(bends, valves, etc.), you may need to select a pipe
with a larger diameter.
Straight pipe
length
Number of collectors
2 to 5 6 to 10 11 to 15 16 to 20
0 to 6 m Ø 15 mm
(DN12)
1)
1) For example, solar twin tube 15 (copper)
Ø 22mm
(DN20)
2)
2) Or solar twin tube DN20 (stainless steel)
Ø 22mm
(DN20)
Ø 22mm
(DN20)
7 to 10 m Ø 15 mm
(DN12)
1)
Ø 22mm
(DN20)
Ø 22mm
(DN20)
Ø 28mm
(DN25)
11 to 15 m Ø 15 mm
(DN12)
1)
Ø 22mm
(DN20)
Ø 28mm
(DN25)
Ø 28mm
(DN25)
16 to 20 m Ø 22 mm
(DN20)
2)
Ø 22mm
(DN20)
Ø 28mm
(DN25)
Ø 28mm
(DN25)
21 to 25 m Ø 22 mm
(DN20)
2)
Ø 28mm
(DN25)
Ø 28mm
(DN25)
Ø 35mm
(DN32)
Table 5 Pipework sizing
7


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