Tips For A Successful Installation; Water Filter; Water Component For Corrosion Limit; Water Pipework - Ferroli OMNIA H Series Installation, Maintenance And User Manual

AVVERTIMENTO
The safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the fl oor in case of overpressure in the
heating circuit. Otherwise, if the discharge valve cuts in and fl oods the room, the boiler manufacturer cannot be held liable.
Before installation, fl ush all the pipes of the system thoroughly to remove any residuals or impurities that could affect proper operation of the
unit.
For that purpose only use suitable guaranteed products for heating systems (see next section), that do not harm metals, plastics or rubber.
The manufacturer declines any liability for damage caused to the generator by failure to properly clean the system.

Tips for a successful installation

For a correct design and installation of the hydraulic plant comply the local laws governing safety matters and sound.
The following information is suggestion for a correct installation of the unit:
• Before connecting the unit to the system wash adequately the pipes using clean water, filling and emptying and cleaning the filters.
Only after that proceed connecting the unit to the system; this operation is crucial to ensure proper start-up without the need to have
repeated stops to clean the filter, with the possible risk of damage to heat exchangers and other components.
• Check by qualified personnel the quality of the water or of the mixture used; avoid the presence of inorganic salts, biological load
(seaweeds, etc.) suspended solids, dissolved oxygen and the pH. Water with inadequate characteristics can cause a pressure drop
increase due to a rapid fouling of the filter, energy efficiency decrease and corrosive symptom increase that can damage the unit.
• The pipes must have the least possible number of bends to minimize load losses and must be adequately supported in order to
prevent the connections of the unait from being excessively stressed.
• Install on-off valves near components that need to be serviced to isolate them when maintenance work needs to be done and to
allow them to be replaced without having to discharge the system.
• Before isolating the pipes and charging the system, carry out preliminary inspections to make sure that there are no leaks.
• Isolate all the chilled water pipes to prevent condensation from forming along the pipes themselves. Make sure that the material
used is the steam barrier type, failing this, cover the insulation with an appropriate protection. Also make sure that the air venting
valves can be accessed through the insulation.
• The circuit can be maintained under pressure using an expansion vessel (present in the unit) and a pressure reducer. A system filling
device can be used that automatically, under a pressure value, provides for the loading and maintenance of the desired pressure.
• Check that all plant components are able to withstand the maximum static pressure (depending on the height of the building to be
served).

Water filter

It is mandatory to install at the inlet of the unit the Y-shape water filter (supplied with the unit).

Water component for corrosion limit

To avoid corrosion problems in water exchangers make sure that the water used in the plant meets the requirements listed in the table.

Water pipework

For temperature probes (eg T5 or T1b) the maximum permitted cable length is 20m. This is the maximum allowed distance between the domestic
hot water tank and the unit (only for installations with a domestic hot water tank). To optimize efficiency, we recommend installing the domestic hot
water tank as close as possible to the unit
☞
NOTE
■ If the installation is equipped with a domestic hot water tank (optional), please refer to the domestic hot water tank Installation &
Owner's Manual.
■ If there is no glycol in the system (antifreeze) or if the unit is not able to remain electrically powered for possible blackouts, in order
to avoid possible icing problems, empty the water during winter.
pH 7.5 ÷ 9.0
SO4 -- < 100
HCO3 -/ SO4 -- >1.0
Total hardness 8.0 ÷ 15.2
Cl- < 50
PO4 3- < 2.0
NH3 < 0.5
INSTALLATION
-
Free Chlorine
Fe3+
ppm
Mn++
CO2
°F
H2S
ppm
Temperature
ppm
Oxygen content
ppm
Requirements
< 0.5 ppm
< 0.5 ppm
< 0.05 ppm
< 50 ppm
< 50 ppb
< 65 °C
< 0.1 ppm
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