32
EN
Cod. 3542B230 - Rev. 00 - 02/2022
OMNIA S HYBRID H 3.2
7.4.3 Heat insulation
In order to avoid the release of cold or heat from the connecting pipeline to the external environment during the operation of the equipment, please take effective
insulation measures for the gas pipe and liquid pipe separately:
1)
The pipe on the gas side should use closed cell foam insulation material, with B1 glass fire-retardant and heat resistance over 120 °C.
2)
When the external diameter of the copper pipe ≤Φ12.7mm, the thickness of the insulating layer at least greater than 15mm; When the external diameter of the cop
-
per pipe ≥Φ15.9mm, the thickness of the insulating layer at least greater than 20mm.
3)
Use heat-insulating materials to do the heat insulation without leaving any parts uninsulated.
7.4.4 Refrigerant amount to be added
Calculate the added refrigerant according to the diameter and length of the pipe on the liquid side of the outdoor unit/indoor unit connection.
If the length of the pipe on the liquid side is less than 15 metres, there is no need to add more refrigerant.
System model
Total length of liquid pipe L (m)
≤15m
>15m
Refrigerant amount to be added
4/6
0g
(L-15)×20g
8/10
0g
(L-15)×38g
7.5 Hydraulic connections
CAUTION
The safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the floor in case of overpressure in
the heating circuit. Otherwise, if the discharge valve cuts in and floods the room, the manufacturer cannot be held liable.
NOTE
The water may drip from the discharge pipe of the pressure-relief device and that this pipe must be left open to the atmosphere.
The pressure-relief device is to be operated regularly to remove lime deposits and to verify that it is not blocked.
Before installation, flush all the pipes of the system thoroughly to remove any residuals or impurities that could affect proper operation of the unit.
In case of replacement of generators in existing installations, the system must be completely emptied and cleaned of any sludge and pollutants. 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.
NOTE
Since the fittings of the indoor unit are brass and brass is a material that deforms easily, use suitable tools to connect the hydraulic circuit. Unsuitable
tools may damage the pipes.
Make the connections to the respective points (see “fig. 7 - dimensional data and connections" on page 24) and to the symbols given on the unit.
7.5.1 Antifreeze system, antifreeze fluids, additives and inhibitors
If necessary, the use of antifreeze fluids, additives and inhibitors is allowed on if the manufacturer of these liquids or additives provides a guarantee that states that
the products are suitable for the use and will not damage the boiler heat exchanger or other components and/or materials of the boiler/heat pump and system. The
use of generic antifreeze fluids, additives and inhibitors is forbidden which are not expressly suited to use in heating systems and compatible with the materials of the
boiler/heat pump and system.
7.5.2 Characteristics of the system water
The hybrid heat pumps are suitable for installation in heating systems with no significant oxygen ingress (ref. “Case I”
systems EN14868 standard). In systems with continuous oxygen ingress (e.g. underfloor systems without de-aeration pipes
or open expansion vessel), or intermittent oxygen ingress (less than 20% of the system water content), a physical separator
must be installed (e.g. a plate heat exchanger).
The water in a heating system must comply with the laws and regulations in force, with the characteristics laid down by the
UNI 8065 standard and the indications of the EN14868 standard (protection of metallic materials against corrosion) must be
observed.
The filling water (initial filling and subsequent top-ups) must be clear, with a hardness of less than 15°F and treated with
chemical conditioners recognised as suitable to ensure that no build-ups, corrosion or attacks on metallic and plastic materi-
als are triggered, that gases do not develop and bacterial or microbial colonies do not proliferate in low temperature systems.
Only use conditioners, additives, inhibitors and antifreeze liquids declared by the producer to be suitable for use in heating
systems and that do not cause damage to the heat exchanger or other components and/or materials of the boiler and system.
