Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 23

3.6.2 CONNECTION TO SOLAR FLOW AND RETURN
Connection to the solar flow and return is made at the back, top, left hand side of the Electro-
max Solar by 22mm compression fittings.
Access to the connections is gained by removing the top panel (see page 11) and moving the
central heating expansion vessel to one side.
The Electromax Solar collectors kits are supplied with two 2 metre lengths of flexible stain-
less steel tube for connection from the Electromax Solar to the collector/s. The tubes include
connections suitable for the solar panels at one end and 22mm compression fittings at the
other end.
For pipe runs longer than 2 metres additional lengths of flexible stainless steel tube are sup-
plied as accessories (accessory code 5122238). Alternatively 22mm copper pipe may be
used. Adaptors to connect the stainless steel tube to 22mm copper are also available ( ac-
cessory code 51222762, 51222763, 51222764).
Only compression fittings or adaptors made from copper, brass, bronze brass or stainless
steel should be used. Soldered joints must not be used in the solar primary circuit.
All connections and joints must be resistant to temperatures of up to 150°C and resistant to
glycol. If pipe sealants are used they must also be resistant to temperatures of up to 150°C
and resistant to glycol.
NOTE: Plastic pipe must not be used.
The distance from the Electromax Solar to the collectors should be kept to a minimum to
reduce system losses.
The height difference between the highest point in the solar primary circuit ( the solar collec-
tor ) and the Electromax Solar should not exceed 15 metres ( this is referred to as the static
height ).
All solar primary pipework between the collectors and the Electromax Solar must be earth
bonded. This work must be carried out be 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 earth bonding cable of min 6mm² diameter.
External pipework should be insulated with high temperature resistant materials and also be
protected against UV degredation. Internal pipework should also be insulated with high tem-
perature resistant materials. The stainless steel flexible tube supplied with the collector kits
are fitted with suitable insulation. Mark the outside of any insulation to identify the flow and
return pipes.
The Electromax Solar includes an air collector / seperator and bleed point so an automatic air
vent should not be needed, however any section of solar pipe work that falls and rises again
may require an additional air vent to relieve any trapped air. The air vent must be compatible
with solar primary systems i.e. be resistant to glycol and temperatures up to 150°C.
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