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7.5.2 Tips for a successful installation
The following information is suggestion for a correct installation of the unit.
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ceed connecting the unit to the plant; 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.
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• 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 plant.
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failing this, cover the insulation with an appropriate protection. Also make sure that the air venting valves can be accessed through the insulation.
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• Check that all plant components are able to withstand the maximum static pressure (depending on the height of the building to be served).
NOTE
problems, empty the water during winter.
The unit is only to be used in a closed water plant. Application in an open water circuit can lead to excessive corrosion of the water piping.
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.
the water circuit. Excessive corrosion of these parts may occur as copper piping is used in the unit's internal water circuit.
7.5.3 Filling with water
2. Make sure the automatic air purge valve is open (at least 2 turns).
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.
The unit is only to be used in a closed water plant. Application in an open water circuit can lead to excessive corrosion of the water piping:
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.
When using a 3-way valve or a 2-way valve in the water circuit. The recommended maximum changeover time of the valve should be less than 60 seconds.
7.5.4 Drainage of the water present in the pipes of the unit
7.5.5
(replacement of the electric resistance).
installation (part.6a "fig. 7 - Example diagram of the system" on page 89).
7.5.6 Water circuit anti-freeze protection
In event of a power failure, the above features would not protect the unit from freezing.
EN
96
Cod. 354M000010 - Rev. 03 - 06/2023
OMNIA SW-T 3.2
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