Riello Dialog Plus 300, Инструкция по эксплуатации

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23
ENGLISH
REPLACING THE PUMP
CHECKS
On completion of the installation, perform the checks listed in the table below.
DESCRIPTION OK
Water circuit
No automatic or manual filling pumps
Safety valve calibrated to 6 bar, and no shut-off valves between it and the collectors
Drain line from safety valve follows suitable path
Expansion vessel correctly located and pre-charged to 2.5 bar
Water return group installed in return line
Solar circuit delivery line connected to the top of the solar storage cylinder coil
Non-return valve activated as gravity brake
Before starting work to replace the pump (C):
- Switch the electricity supply to the storage cylinder’s
valve group and to any associated boiler OFF at the
main switch and at the control panel.
- Close the flow regulator (V).
- Turn the return valve knob 90° clockwise to close the
return valve (R).
- Unscrew the ring nuts H1 and H2 and remove the
pump (C).
Reverse the above steps to fit the new pump.
V
Gruppo di
mandata
Gruppo di
ritorno
C
R
H1
H2
Outlet
group
Return
group