Baxi Solarflo Installation Manual page 15

Fig. 16
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© Baxi Heating UK Ltd 2008
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9.0 Installation of pump station
9.3
See Fig. 16
1 Solar cylinder
2 Collector temperature sensor lead
3 Solar primary return (to collector)
4 Solar collector
5 Solar primary flow (from collector)
6 Solar primary return (from cylinder)
7 Solar primary flow (to cylinder)
8 Solar differential temperature controller
9 Cylinder temperature sensor lead
9.4 Pipework installation - general
The collectors, the pump station and the solar cylinder (Fig. 16)
must be connected with the stainless steel pipework supplied.
For additional lengths over 15 metres use copper pipe with
compression fittings.
NOTE: Plastic pipes MUST NOT be used.
Connections supplied are suitable for pipe diameters up to
22mm. However for short pipe runs (up to 10m flow and
return) the use of 15mm diameter pipe is acceptable.
In solar heating systems, use only pipes and fittings made from
copper, brass, bronze brass or stainless steel. Compression
fittings only must be used.
All connections and joints must be resistant to temperatures
quoted and resistant to glycol.
The height difference between the highest point in the
pipework (collector) and the pump station may be a maximum
of 15m (this is called the 'static height'). If the static height is
greater than 15m a larger expansion vessel may be required.
If any pipe sealants are used these should be resistant to glycol
and able to withstand temperatures of up to 200°C.
Earthing pipework
All solar primary pipework between the solar collectors,
hydraulic station and solar cylinder must be earth bonded to
avoid electrical potential differences.This work must be carried
out by a qualified electrician.
Fit earthing clamps to the solar primary flow and return pipes
and connect the earth clamps to the earthing system of the
property using an earth bonding cable of min. 6mm 2 diameter.
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