15
TC 75
The boiler set point temperature can be changed by browsing with the set button until the option
“tc”
appears on the display. When it appears, push the set button in and hold it down for 5
seconds, until the symbol
"tc"
begins to flash. Then push the set button successively to increase the
boiler set point temperature. When the desired temperature has been selected, push the set button
and hold it down for 5 seconds again, until it stops flashing. The value selected will be stored in the
memory.
9 ADDITIONAL FUNCTIONS
The Evolution EV AC boiler is equipped with an electronic control for efficiently regulating automatic
boiler operation. It also includes the following additional control features:
9.1 Pump anti-block function
This feature prevents the boiler circulation pumps from blocking if the pumps have not been
started up for a long period of time. This system remains enabled while the boiler is plugged into
the mains.
9.2 Anti-frost function
This function protects the boiler from freezing up during cold weather. If the boiler temperature
drops to below 6 ºC, the heating circulation pump will start up. If the boiler temperature continues
to drop and reaches 4 ºC, the burner will start up, heating the installation. When this function has
been activated, it will remain active until the boiler reaches 8 ºC. This system remains on standby
while the boiler is plugged into the mains.
9.3 Boiler pressure sensor function
This function prevents boiler failure due to a low water level and excess pressure in the boiler. The
pressure is detected by a pressure sensor
(5)
, and its value appears on the control panel display. If
the pressure drops below 0.5 bar, the electronic control switches off the boiler and activates an
alarm on the display. When the boiler pressure reaches 2.5 bar, an alarm pilot light
(12)
begins to
flash to warn that the pressure is too high. In this case we recommend calling the Technical
Assistance Service, and to partially drain the boiler.
9.4 Telephone relay connection
The Evolution boiler is designed to enable a phone relay to be connected for switching the boiler
on and off. This feature allows the boiler to be switched on and off remotely, from any location, by
means of a phone call. The relay is connected to the boiler via terminal strip J6 (see Electrical
Connection Diagram). When the phone relay contact closes, the boiler switches on, and when the
relay is open, it switches off, with the anti-frost protection and pump anti-block functions
remaining activated.
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