INSTALLER
36
EMPTYING THE SYSTEM
Switch the electricity supply OFF at the system’s main
switch and turn the control panel function selector to
OFF (
I
) before starting to empty the boiler or storage
cylinder.
- Close the shut-off cocks for the water circuit
- Connect plastic hoses (5) to the hose unions on the
boiler drain cock (1) and/or storage cylinder drain
cock (2) (
NK
models).
NOTE
Open the non-return valve (3) to facilitate emptying
(the slot in the screw must be perpendicular to the
direction of flow).
Open a hot water tap to facilitate emptying.
1
5
g
N
open
2
5
5
1
3
g
60 NK
3
5
2
1
g
100 NK
20
40
60
80
100
0
120
open
