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Austria Email EHT serie Manual

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EN
23
SERVICE WATER CONNECTION PRESSUREPROOF
Any warranty for our water heaters shall be rejected in case of use of unsuitable or inoperative storage
connector ttings as well as an exceedance of the specied operating pressure.
All storage tanks and boilers with “Max. operating pressure 6 bar” or “Max. operating pressure 10 bar”
on their power rating plate are pressure-resistant storage tanks. The connection/connecting components
(e.g. safety valve, pressure reducer) are to be designed/dimensioned in accordance with national stan-
dards and regulations (e.g. DIN 1988-20; ÖNORM EN 806-2).
Attention: The mains water pressure must match the safety valve, if required, a pressure reducer
should be used!
A pressure reducing valve must be installed in the cold water supply line should the line pressure be hig-
her.
The water plumbing must only be implemented using a tested diaphragm safety valve or a diaphragm
safety valve combination (connector tting for pressure-type storage tanks)!
A safety valve combination consists of a shuto, test, non-return, drain and safety valve with an expansi-
on water drain and is installed between the cold water supply line and the cold water supply (blue) of the
storage tank in the order as drawn.
The following must principally be observed:
In order to ensure a awless function of the connector tting, it must only be mounted in frost-protected rooms.
The drain of the safety valve must be open and observable or the outlet pipe from the drop collector (expansion
water funnel) must lead into the sewer, so that neither frost nor clogging by dirt or anything similar may cause any
malfunction. Make sure that the drip cup is not blocked.
Furthermore, it must be observed that the drain pipe of the safety valve must be installed with a steady downward
inclination.
No shuto valve or other throttling must be installed between the safety valve and the cold water supply of the
storage tank. The safety valve must be set to a response pressure that is lower than the nominal pressure (6 bar) of
the storage tank. The cold water supply line must be rinsed out before the storage tank is connected nally. The
discharge openings of the safety valves (domestic water and heating circuits) must open out into an appropriate
drainage object in order to avoid any damage caused by the escape of operating uid.
After completed plumbing and bubble-free lling of the storage tank, the connector tting must be checked for
functionality.
a) In order to avoid a blockage of the venting facility of the safety valve due to furring, the venting facility of the
safety valve must be operated from time to time during operation of the system. It must be observed whether
the valve closes again after releasing the venting facility and whether the water in place runs o completely
through the funnel or the blow-o pipe.
b) For safety valves installed ahead of water heaters, it must be observed whether the safety valve responds du-
ring heating of the water heater. This can be identied by the exit of water from the blow-o pipe.
Tank
Safety valve
Waste valve
Non-return valve
Test valve
Pressure reducing valve
Shut-off valve
Service water fixtures
… 23 …


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