Preparing For Start-Up; First-Time Startup - Riello NUOVO ACU Series Technical Information Assembly, Use And Maintenance Instructions

Before starting and testing the fan heater check that:
 the heater unit is positioned correctly;
 the check valves are open;
 water and electrical connections have been made correctly;
 water pressure (unit cold) is as required;
 any air has been bled from the system;
 the fins are open.
When the packaging is opened, the horizontal flow
directional fins are almost completely closed. The
horizontal fins must be adjusted during
installation so as to create an airflow suitable for
the room/area being heated. Such airflow must not
disturb the persons occupying such room/area. The
fins can be individually adjusted manually.
Do not close the horizontal fins completely.
Adjust the flow directing fins by grabbing them on
the extremity.
Use suitable protective equipment.
ACTIVATING THE HEATING FUNCTION:
 Position the main switch to ON.;
 Set fan speed as desired (where speed selector switch is installed);
 Set room thermostat to desired temperature (higher than current room temperature);
 At this point both the water circulator and the heater fan start simultaneously. To prevent an initial
outflow of unpleasant cold air it is possible to delay fan start-up with the aid of a minimum
thermostat (not supplied as accessory). This thermostat also delays fan shutdown so as to disperse
all the heat accumulated in the exchanger into the room/area to be heated;
 once the temperature set on the room thermostat has been reached the heater will shut down.
When the temperature drops back down below this setting the fan heater restarts automatically;
DEACTIVATING THE HEATING FUNCTION:
 Set the room thermostat to "anti-freeze" and wait for the fan heater to shut down;
 Turn the main switch to OFF.

PREPARING FOR START-UP

FIN ADJUSTMENT
FIRST-TIME START-UP
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