THERMEx Sierra Manual De Instrucciones página 6

EN hot water outlet valve (Fig. 1, p. 12) and hot water tap on mixer to ensure outflow of air
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from the EWH. When the final EWH filling, water will continuously flow out of mixer
tap. When connecting EWH in places not provided with water supply it is permitted to
supply water in EWH from auxiliary tank using pumping station, or from reservoir
placed at a height of not less than 5 meters over the top of EWH.
Note: for ease of maintenance during EWH operation it is recommended to install
drain valve (Fig. 1, p. 4) in accordance with Fig. 1 (for models not equipped with drain-
age pipe (not in the scope of EWH supply)).
If the water pressure exceeds 0.75 MPa, at EWH cold water inlet, before the safety
valve (in the direction of water flow), the appropriate pressure reducing valve (not sup-
plied with the EWH) shall be installed to reduce water pressure to standard.
Prior to the water heater connection to electrical network, make sure its parameters
complies with the technical specifications of the water heater.
ATTENTION! Prior to power activation make sure EWH is filled with water!
Water heater shall be earthed to ensure safe operation. EWH is equipped with the
stationary power cable (option) with Europlug (option). Power outlet shall have an earth
terminal with the connected earthing wire and located in the area protected from mois-
ture, or comply with the requirements not less than 1РХ4.
The EWH is switched on/off by turning the indicator line on the control knob lo-
cated on the protective cover of the water heater (Fig. 1, p. 16) to the "OFF" zone. The
water temperature in the inner tank is adjusted using the control knob (Fig. 1, p. 16) in
the range of values from "OFF" (minimum values) to "HIGH" (maximum values). The
control indicator lamp displays the operating mode of the EWH - it glows when the
water is heated and goes out when the set temperature is reached.
When performing maintenance scale on THE is checked. At the same time residue
that may accumulate in the bottom of the EWH is removed. If there is scale on THE, it
can be removed by using scale removing means or mechanically. It is recommended to
hold the first technical maintenance after a year from the time of connection by experts
of a specialized organization and depending on intensity of scale and residue to deter-
mine intervals of follow-up maintenance. This action will extend the maximum EWH
service life.
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9. CONNECTION TO POWER SUPPLY
10. OPERATION
11. TECHNICAL MAINTENANCE