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ACCESSORIES ELECTRIC WIRING SCHEME
For the eventual electric wiring of accessories, you have to refer to the instructions included in to the
package of the accessories.
FILLING – EMPTYING THE UNIT
FILLING:
Before starting filling:
position the main switch to OFF.
check that the water system drain valve is closed;
open the upper manual bleed valve.
start filling by slowly opening the water system filling valve external
to the heater unit;
when water begins flowing out of the bleed valve close the latter and
continue filling until correct system pressure is reached;
repeat the procedure after the heater has been running a few hours
and periodically check pressure;
check that there are no leaks.
WARNING!!!
If there is a risk of sub-zero temperatures mix some
anti-freeze into the water in manufacturer-
recommended quantities.
EMPTYING:
Before starting emptying:
position the main switch to OFF.
check that the water system drain valve is closed;
open the manual bleed valves (A).
open the system drain valve and drain all the water;
close the manual bleed valves and remove any trace of
water from the system with the aid of compressed air.
WARNING!!!
If the system contains anti-freeze the water
must be collected and, where possible, re-used.
Do not dump as with normal water, because
the anti-freeze is a pollutant.
