Riello 20118250, Installation And Maintenance Manual

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INSTALLATION
2.11.2 Filling
Before starting, check that:
− The boiler drain (3) and the heater drain (2) valves are
closed and that the shut-off valves on the cold water in-
let (CWI) are open;
1
2
3
− Open the system load valve (1) and slowly load until the
display reaches the water pressure value (cold water) of
1.5 bar
Bar
°C
− Close the load valve.
NOTE The system is de-aerated automatically through the
automatic vent valve.
The drain pipe of the drain valve must be connected to a
suitable collection system.
2.11.3 Emptying
Before emptying:
− Set the main switch of the system to OFF and the main
switch of the equipment to ( 0 ).
− Close the water supply shut-off cocks;
− To empty the boiler, connect a rubber tube (A) (in-
tø=12mm) to the hose connector of the boiler drain valve
(1) and open it.
1
A
2.11.4 Heater emptying
To empty the heater:
− Make sure that the system load valve (1) is closed;
− Connect a rubber hose (A) (intø=12mm) to the hose con-
nector of the heater drain valve (2) and open it.
2
A
1
NOTE Open a hot water tap to facilitate emptying the storage
cylinder.