TESY HPWH 2.1 260 U02 S Instrucciones De Uso Y Mantenimiento página 16

Fig. 8 Connections to the water supply net and solar collector
Fig 8a
When the water hardness is particularly high (higher than 25°F), it is recommended to use a water
softener, properly calibrated and monitored; in this case the residual hardness should not fall below
15°F.
•
Usage of this device at temperature and pressure level above prescribed leads to warranty violation!
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This device is intended for heating of potable water in liquid state. Using different fluids in different
states leads to warranty violation!
•
Device's heat exchangers are intended for use with circulating clean water and mixture of it plus
Propylene GLYCOL at liquid state. The presence of anticorrosion additives is obligatory. Using
different fluids in different states leads to warranty violation!
•
Dissimilar Metals cause galvanic corrosion. Therefore pipes, joints and fittings of dissimilar metals
should be connected to the appliance by means of dielectric separators.
•
Plastic pipes (PP) are permeable to oxygen. It is forbidden to connect the heat exchanger to system
made by PP pipes as well as to open circulation system! Abusing this rule will lead to corrosion
inside tube.
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It is obligatory for the system installer to fit an 8-bar safety valve No5 on the cold water intake pipe
(Fig. 8).
•
It is forbidden a presence of any stop valves, taps between the safety valve and storage tank!
The safety equipment for protection against over pressure must be operated regularly in order to
remove limescale deposits and to check that it is not blocked (Fig. 8)
The drain pipe No6, connected to the safety valve must be installed sloping continuously downwards
and, in a place, where it is protected against the formation of ice (Fig. 8). Using a tundish is obligatory
(Fig.8a)
An expansion vessel No10 (Fig.8) should be installed in order to absorb water expansion due to
temperature variation. Pressure regulator No3 and expansion vessel should be calculated together by
qualified person.
WARNING! The heat pump for the production of domestic hot water is capable of heating water up to
more than 65°C. For this reason, as a protection against burns, it is necessary to install an automatic
thermostat mixing equipment No16 to the hot waterpipe (Fig. 8)
Obligatory elements to be installed:
1. Water inlet pipe
2. Shut-off valve
3. Inlet water pressure regulator
4. Back flow preventing valve
Safety valve – 8 Bar
5.
6. Safety valves drainage
7. Safety valves drainage
8. Tank drainage valve
15
10. Expansion vessel
11. Solar Safety valve – 6 Bar
12. Solar expansion vessel.
15. Recirculating pump; I max = 5A (solar or
recirculation
16. Thermostatic mixing valve
17. Flow switch
18. External thermosensor (solar or
recirculation)
E. Heat pump controller