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Austria Email EWH serie Manual

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EKH-S, EWH Id. Nr.: 248735-6
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 collec-
tor (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 che-
cked 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.
Implementation: operator, plumber
Time interval: every 6 months
Maintenance and repairs:
If no water exits during heating of the water heater or in the event of a permanent leak of the safety valve, an
attempt must be made to loosen the valve by repeated operation of the venting facility or to rinse out any possib-
le foreign object (e.g. fur particle) on the sealing unit.
If this cannot be achieved, appropriate repairs by a plumber must be initiated. The complete safety valve must be
replaced in the case of any damage to the valve seat or sealing ring.
Implementation: plumber
Time interval: yearly
To test the non-return valve, the shuto valve is closed and no water must run out of the opened test valve.
The storage tank is operated using the hot water valve of the service tting (mixer tap). As a result, the storage
tank is constantly under line pressure. To protect the internal boiler from overpressure during heating, the appe-
aring expansion water is discharged through the safety valve.
In order to avoid damages to the hot water tank from overpressure, it is absolutely necessary to replace any furred
safety valves. The non-return valve prevents the hot water from owing back into the cold water supply net in the
case of a loss of line pressure, thus protecting the boiler from heating up without water. Using the shuto valve,
the storage tank can be separated in relation to water and thus also from the cold water supply network, and
emptied through the drain valve, if required.
… 28 …


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