15
Once the heater has reached a
temperature of 50 °F (10 °C), the
heating pump will automatically
comes on. If the temperature falls
below 41 °F (5 °C), the burner will
light to prevent the heater from
freezing.
5.10 - Display in
energy saver mode
The display, in Figure 5-1, is switched
off each time no key is touched for at
least 5 minutes, with the exception of
when it displays errors or settings.
5 - USE
5.7 - Delays, alarms
and protective
actions
To protect the life of the appliance,
improve comfort, and maximize energy
savings, the following timings have
been incorporated into the control
logic:
a - Pump delay: each time the room
thermostat is satisfi ed, the circulator
pump continues to run for 4 minutes;
b - DHW delay: each time the domestic
hot water demand is satisfi ed, a 4
minutes delay must pass before the
end of the service;
e - Time delay in restarting the burner:
in its normal functioning state, every
time the burner stops, there is a
delay time of 3 minutes before the
boiler restarts again.
5.8 - Circulator
pump protection
During the summer months, the
circulators pumps are run once a day
for around 15 seconds to prevent it
from seizing.
5.9 - Freeze
protection
CAUTION!!!
For the freeze
protection function to work, the
heater must remain connected
to the electrical and gas
supplies with DHW and central
heating service switched to OFF
CAUTION!!!
This freeze
protection function is
conceived to protect the heater
only, not the heating system.
CAUTION!!!
Because the
heater’s freeze protection
function depends from the
electrical supply and from the
gas supply, it is mandatory
install a safety device that
alarm the user in a case the
heater room will reach a
temperature near 35°F (2°C)
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