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5 HOW TO...
5.1 HOW TO INCREASE THE SYSTEM PRESSURE
The system pressure must be checked periodically to ensure the
correct operation of the boiler. The system pressure is shown at the
top of the display. When the boiler is at room temperature, the
system pressure should be approximately 14.5 psi.
If the pressure needs to be increased use the following
instructions as a guide.
-
Open the fill tap slowly until you hear water entering the
system.
-
Close the fill tap when the pressure reads between
14.5 and
21.7
psi
.
filling tap
5.2 HOW TO SHUT DOWN THE SYSTEM FOR SHORT
PERIODS
In the event of temporary absences (weekends, short breaks,
etc.) set the status of the boiler to OFF by pressing
the “
MODE/OK”
button until the display shows “-OFF-
“.
RESET
MENU
-OFF-
OK
MODE
While the electrical supply and the fuel supply remain active, the
boiler is protected by the following:
-
heating anti-freeze:
this function is activated if the
temperature measured by the flow sensor drops below 9°F
(5°C). A heat request is generated in this phase with the ignition
of the burner at minimum output, which is maintained until
the outlet water temperature reaches 95°F (35° C);
-
domestic hot water anti-freeze:
the function starts if the
temperature measured by the DHW NTC probe falls below 9°F
(5°C). A heat request is generated in this phase with the ignition
of the burner at minimum output, which is maintained until
the outlet water temperature reaches 131°F (55° C).
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NOTICE:
The activation of the ANTI-FREEZE function is
indicated by the
icon displayed on the front control.
- circulator anti-seize:
the circulator activates every 24 hours
for 30 seconds if there is no heating or domestic requests.
5.3 HOW TO SHUT DOWN THE SYSTEM FOR LONG
PERIODS
If the
Residence PRO
boiler is not used for a long time, the
following operations must be carried out:
- set the status of the boiler to OFF by pressing
the “
MODE/OK”
button till the display shows “-OFF-
“
-
se
t the system’s main switch to “off”
-
close
the fuel and water taps of the heating and domestic hot
water system.
WARNING:
In this case, the anti-freeze and anti-seize systems
are deactivated. Drain the heating and domestic water system if
there is any risk of freezing.
RESET
MENU
-OFF-
OK
MODE
5.4 DRAINING THE HEATING CIRCUIT OF THE BOILER
Before draining the system, switch off the electrical supply by
turning off the main switch of the system.
− Close the heating system’s valves
− Manually loosen the system drain valve (
C
).
B
A
C
5.5 EMPTYING THE DOMESTIC HOT WATER SYSTEM
Whenever there is risk of freezing, the domestic hot water system
must be emptied in the following way:
− turn off the main water supply tap
− turn on all the hot and cold water taps
− drain from the lowest points.
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DANGER:
The system water temperature could be very hot,
be sure when opening the drain valve that the rubber pipe
is well attached.
Water could spray from the front of the unit
and cause instant severe burns or death from scalds.
