99
CAUTION!!!
do not demandate
the antifreeze protection of
your house to the heater.
Because the heaters’ function
depends from the electrical
supply and from the gas
supply and because a trouble
can stops the heaters, if you
live your house, it is mandatory
install a safety device that
alarm the user in a case the
house will reach a temperature
near 40°F (4°C).
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.
If the heater will not be used for long
time it should be drained per Section
15.9.
14.12 - Display in
energy saver mode
The display, in Figure 14-1, is
switched off each time no key is
touched for at least 5 minutes, with
the exception of when it displays
errors or settings.
14 - USE
14.9 - 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 pass before the end
of the service;
c - 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
burner starts again.
14.10 - Circulator
pump protection
During stand by state, circulators
pumps run once a day for around 15
seconds to prevent them from seizing.
14.11 - Heater’s
Freeze protection
CAUTION!!!
For the freeze
protection function to work, the
heater must remain connected
to the electrical and gas
supplies with DHW and heating
service switched to OFF
CAUTION!!!
This freeze
protection function is
conceived to protect the heater
only, not the system.
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