Ferroli OMNIA HYBRID C, Инструкция по установке, эксплуатации и обслуживанию

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EN
Cod. 3541T090 - Rev. 00 - 06/2019
INSTALLATION
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).
☞
NOTE
• 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.
• The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive corrosion of the water piping.
• Water connections must be made in accordance with the outlook diagram delivered with the unit, with respect to the water intake and water outlet (refer to section
“DIMENSIONAL AND PHYSICAL DATA”).
• If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit:
• Use clean pipes only.
• Hold the pipe end downwards when removing burrs
• Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
• Use a good thread sealant for sealing the connections. The sealing must be able to withstand the pressures and temperatures of the system.
• When using non-brass metallic piping,make sure to insulate both materials from each other to prevent galvanic corrosion. Never use Zn-coated parts in the water
circuit. Excessive corrosion of these parts may occur as copper piping is used in the unit’s internal water circuit.
Filling with water
1. Connect the water supply to the relevant connection (see part 9 “fig. 6 - dimensional data and connections” on page 11) and open the valve.
2. Make sure the automatic air purge valve is open (at least 2 turns).
3. Fill with water until the manometer indicates a pressure of approximately 2.0 bar. Remove air in the circuit as much as possible using the air purge valves. Air present
in the water circuit might cause malfunctioning of the backup heater.
☞
NOTE
During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the automatic air purge valves during the first
operating hours of the system. Topping up the water afterwards might be required.
The water pressure indicated on the manometer will vary depending on the water temperature (higher pressure at higher water temperature). However, at
all times water pressure should remain above 0.3 bar to avoid air entering the circuit.
Piping insulation
The complete hydraulic circuit that includes all the pipes must be insulated to avoid heat loss, condensation during operation, reduction of heating or cooling capacity,
as well as to prevent freezing of water pipes during winter.
6.13 Boiler gas connection
Before making the connection, ensure that the unit is arranged for operation with the type of fuel available.
The gas must be connected to the corresponding union (vedi
fig. 6
) in conformity with current regulations, with a rigid
metal pipe or with a continuous flexible s/steel tube, installing a gas cock between the system and boiler. Make sure
that all the gas connections are tight. Otherwise there may be a risk of fire, explosion or suffocation.