Switching Off For Long Periods; Maintenance - Riello NUOVO ACU Series Technical Information Assembly, Use And Maintenance Instructions

Water-fed fan heaters

Hide thumbs

Table of Contents

CHECKS DURING AND AFTER FIRST-TIME START-UP

Once the fan heater has been started check that it shuts down on reaching the required temperature and

then restarts again when the room cools down (adjust the room thermostat settings if necessary).

With the fan heater running:



check that the fan(s) rotates the right way;



check that fan(s) operates at the various speeds (where fan speed control switch is installed);



check that electrical absorption is less than indicated in the TECHNICAL DATA chapter;



check that there are no water leaks;



check that the fins are not too close together and that there is no obstruction to airflow.

If the fan heater passes all these checks it may be restarted.

If the fan heater is expected to remain idle for a lengthy period proceed as follows:



deactivate the fan heater by acting on the room thermostat;



turn the main switch to OFF;



close the water check valves.

WARNING!!!

If there is a risk of sub-zero temperatures and the system water does not contain an

anti-freeze liquid you must drain the system.

Periodic maintenance is essential for the safety, efficiency and long-term performance of the unit.

Before doing any maintenance work:



cut the power by turning the main switch to OFF;



close the water check valves.

The annual maintenance schedule to be observed by the Authorised Technical Service or maintenance

technician is as follows:

WARNING!!!

For installation in particular environments the periodical maintenance have been carried out every 6

months.

After maintenance operations, the original conditions must be restored.