Baxi DN 25 Installation And Operating Instructions For The Specialised Installer page 12

3. Fix wall brackets (5) with the rear insulation (4)
and engage the solar station (1) into the brackets
(5).
Illustr. 6.6 Engage station
4. Reconnect the cables to the pump and push
control retainer (6) with the controller (7) onto the
rear insulation (4). Mount front insulation (3) and
insulate the supply and return pipes up to the
thermal insulation.
5. Connect pipework of the solar circuit to the upper
and lower connection by use of compression
fittings. When using soft and thin walled pipes,
reinforcing sleeves are to be used for the additional
stabilisation of the pipe. The ends of the pipe have
to be cut at right angles and have to be free of
burrs. Introduce pipe until stop and firmly tighten
the compression fittings by using a spanner. Hold
firmly while tightening.
6. Screw safety group (2) onto the return ball valve.
Mount discharge pipe of the safety valve to the
collecting basin (8) and the connection pipe of the
safety group towards the expansion tank (9)
(Installation discharge pipe see also paragraph 6.1
– Safety valve).
Illustr. 6.7 Safety group connection
12
7. Lead cables of the pump downwards and connect
to the control unit according to the installation
instructions of the manufacturer of the solar plant.
For pumps with connecting plugs see illustr. 6.2.
8. Flush solar plant thoroughly, then fill it up with
solar liquid and carry out leakage test. Adapt
volume flow to the number of collectors or the
collector surface via the phases of the circulation
pump. If required, the fine adjustment is carried
out by using the ball valve of the flow measuring
and regulating device.
9. Functional description and setting of the
controller are detailed in the separate installation
and operating instructions of the controller
6.4 Filling and flushing
WARNING
The use of high pressure pumps can cause
damage to the solar plant
When using the flushing station, the corresponding
operating instructions must always be observed
CAUTION
The solar plant must always be flushed in
the flow direction of the circulation pump
The expansion tank must always be removed before
filling the solar plant.
WARNING
The installation must never be flushed with
liquids containing solvents as these can
cause damage to plastic parts (e.g. pump
impellers and seals)
Filling and flushing of the solar plant can be carried
out with the help of the safety group and flow
measuring and regulating device of the solar station.