Additional Functions; Pump Anti-Block Function; Anti-Frost Function; Boiler Pressure Sensor Function - Trianco TRO Evolution System Series Installation And Operating Instructions Manual

10.- ADDITIONAL FUNCTIONS

The TRO Evolution System boiler is equipped with an electronic control for efficiently regulating
automatic boiler functioning. It also has the following additional control features:

10.1.- Pump anti-block function

This function prevents the boiler circulation pumps from seizing up if they have been out of
use for a long period. This system remains enabled while the boiler is plugged into the mains.

10.2.- 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 continue working until the boiler
reaches 8ºC. This system remains on standby while the boiler is plugged into the mains.

10.3.- Boiler pressure sensor function

This function prevents boiler failure caused by a low water level or excess pressure in the
boiler. The pressure is detected by a pressure sensor (6), and its value appears on the control
panel display (see "Digital display"). If the pressure drops below 0.5 bar, the electronic
control blocks boiler functioning and triggers the "AP" alarm on the display. If boiler pressure
exceeds 2.5 bar, the "HI" warning will flash on the display to warn of the excess pressure. If this
should occur we recommend calling the nearest Technical Assistance Service, and slightly
draining the boiler.

10.4.- Telephone relay connection

The TRO Evolution System 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 telephone relay
contact closes the boiler switches on. When the contact opens, the boiler switches off and
remains in anti-frost protection and pump anti-block mode.

10.5.- Room thermostat connection

The boiler has two terminal strips, TA
chronothermostats (J5 and J7, see "Electrical Connection Diagram"). This allows the heating
mode for each circuit installed to be switched off according to the room temperature. To
suitably connect them, first remove the bridge joining the terminals of terminal strip TA
to connect TA , simply connect the thermostat to the terminal strip.
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Installing a room thermostat will optimise the installation's performance, adapting the
heating to the requirements of your home and obtaining enhanced comfort. Also, if the
thermostat allows the hours of functioning to be programmed (chronothermostat), it can
adapt the heating system to the hours of use of the installation.
and TA , for connecting room thermostats or room
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