Installer’s Guide – (Gas Post-Boost) Solar Water Heater
6
H4110 4110 Rev. F
Installer’s Guide
• It is
critical
to stop any chance of an
air lock developing, so ensure that:
– no pipework is higher than the
automatic air vent valve
– flow and return pipes from the solar
collectors to the water storage tank
have a minimum of 5° continuous fall
– pipes have no high points that
allow air to be trapped
– the minimum number of bends in
the pipes are used.
• Flow and return lines should be
neatly installed and hidden inside the
roof cavity if possible.
• Take care when running flow
and return lines through the roof,
cladding and the eaves.
Note: Where roof and
the eaves are made from
asbestos, specialised handling
and advice is necessary.
Pipes must have no
high points that allow
air to be trapped
No pipes can be higher than
the air bleed valve
Minimum 5°
continuous fall
To collectors
Use minimum
number of bends
Must fully
insulate flow
and return
pipes
Minimum 5°
continuous fall
To collectors
Non continuous
fall
To collectors
Incorrect
Correct
Ensure flow and return pipes from the solar collectors to the
water storage tank have a minimum of 5° continuous fall
