Ferroli OPERA Instructions D'utilisation, D'installation Et D'entretien page 141

OPERA
The unit is equipped with a frost protection system that activates the boiler in heating mode when the system delivery
water temperature falls below 6°C. The device is not active if the power and/or gas supply to the unit is turned off. If
necessary, for system protection use a suitable anti-freeze liquid that meets the same requirements as set out above
and provided for by UNI 8065.
In the presence of adequate chemical/physical system and feed water treatments and related high cyclicity controls able
to ensure the required parameters, for industrial process applications the product can be installed in open-vessel sys-
tems with vessel hydrostatic height able to ensure compliance with the minimum operating pressure indicated in the
product technical specifications.
To ensure the reliability and correct operation of the boilers, always install a mechanical filter in the loading
circuit and, in the system, a dirt separator (possibly magnetic) and a deaerator as required by the UNI 8065 as
well as a volumetric meter on the system replenishment line.
Failure to comply with the provisions of this paragraph, "System water fea-
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tures", will involve non-recognition of the warranty and damage due to such
shortcomings.
Combustion chamber maintenance
To ensure the efficiency and reliability of the generator over time, it is very important to contact our authorized technical
assistance service, at least once a year, for routine maintenance operations and also for checking the combustion
chamber and, if necessary, its cleaning. In this regard we recommend the use of the following products, checked and
tested on our exchangers and available at our Authorized Technical Assistance Centers.
Table 4- Products declared suitable and available at our network of Authorized Technical Assistan-
ce Centers
Description
BIO INF Liquid product for cleaning steel combustion chambers
Products with equivalent characteristics may be used
Given the aggressiveness of the chemical products for combustion chambers, always rely only and exclusively on qua-
lified personnel and make safe the sensitive elements, such as the electrodes, insulating materials, etc., that could be-
come damaged by direct contact with the product. Rinse well after each heat exchanger cleaning process (product
application time 15-20 minutes) and repeat the operation as required.
Irrespective of the chemical products used, always make use of qualified technical
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personnel such as our authorized technical assistance network and manage the
technological fluids according to the applicable local laws, rules and regulations.
Hydraulic circuit examples
In the examples described below, the checking/change of some parameters may be required.
To do this it is necessary to access the Technical menu.
From the Home page, press the main Menu button (detail 12 - fig. 1).
Access the "Technical" menu by pressing the contextual button 2 (detail 2 - fig. 1).
EN
MENU
USER
2
TECHNICIAN
fig. 31
cod. 3541R960 - Rev. 00 - 09/2019
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