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Austria Email HRS 500 Manual

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Id.Nr.: 241525-1 DE - GB - F
GB
The safety valve must be set to a response pressure which is less than the rated pressure of the tank. Before nally connec-
ting the tank, ush the cold water line.
After making the water connection and air-bubble free lling of the tank, check the tting for proper function.
When lifting or turning (venting) the safety valve test button, the water must ow out freely and without backing up through
the expansion water outlet funnel.
To check the return valve, the shut-off valve must be closed and no water may ow out from the opened test valve. The
safety valve must be checked according to DIN 1988-8 or ÖNORM B 2531-1.
The water heater is operated using the hot water valve on the service water tting. This means the tank is under continuous
line pressure. To protect the internal boiler against overpressure when heating up, the expansion water created is dispersed
through the safety valve every time it is heated. The return valve prevents hot water from owing back into the cold water line
when there is a pressure drop and thus protects the boiler from heating when no water is present.
The shut-off valve can be used to isolate the tank on the water side and thereby eliminate the pressure from the cold water
supply, also allowing use of the waste valve when necessary.
6. CIRCULATION CONNECTION
Due to signicant energy loss, a circulation connection should be avoided when possible. If a highly branched service
water network requires a circulation line, this must be well insulated and the circulation pump controlled via a timer and
thermostat. The switching temperature of the thermostat should be kept low (45°C). The circulation connection piece has
an external thread.
7. FLANGE INSERTION OPENING
Depending on the system design, electric built-in heaters or heat exchangers can be installed on the boiler ange Ø240
mm (clear diameter Ø173 mm, hole circle Ø210 mm, 12 x M12) and Ø180 (clear diameter Ø117 mm, hole circle Ø150
mm, 8 x M12).
Built-in electric heating elements are to be installed so that the thermostat probe is at the top.
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