27
HOW TO
5.3
How to prepare for extended periods of shut-
down
Long periods of inactivity of the thermal module require the follow-
ing operations to be carried out:
− turn the main switch of the boiler and the main system
switch to "off"
− Close the fuel and water valves for the heating and domestic
hot water system.
9
WARNING
: Empty the central heating and domestic system if
there is a danger of freezing.
5.4
How to fill and drain the system
The
Condexa PRO NA
must be provided with a means of filling the
system to be connected to the appliance's return line.
RI
Before filling or draining the system, switch the system's master
switch to the OFF position and the boiler's master switch to (
0
).
5.4.1
How to fill
− Make sure the drain cock (1) is closed before you start filling
the system
1
5.4.2
How to drain
Before starting to empty the appliance and the storage cylinder:
− Switch the system's master switch to the OFF position and
the boiler's master switch to (
0
).
− Close the water supply shut-off cocks;
− In order to empty the appliance, fit a rubber hose (2) (inner
diameter int. Ø = 1/2" (13mm)) to the boiler's drain valve (1).
1
2
