THERMEx Sierra Manual De Instrucciones página 7

ATTENTION: accumulation of scale on TEH may cause its damage .
Note: Damages to THE due to scale formation are not subject to warranty. Regular
maintenance is not included in the warranty of the manufacturer and the seller.
The following shall be carried out for maintenance:
•
Turn off EWH power;
•
Cool hot water or discharge it through the mixer;
•
Cut off supply of cold water into EWH;
•
Unscrew the relief valve or open drain valve;
•
To put on the cold water supply inlet or discharge valve a rubber hose,
sending the other end down the drain;
•
Open hot water tap on mixer and drain water from the EWH through
the hose;
•
Remove the protective cover, disconnect wires, unscrew and remove
from the casing the removable flange;
•
Clean if necessary THEs from scale and remove residue from the tank;
•
Assemble, fill the EWH with water and power on.
In models with drain pipe, it is enough to cut off the flow of cold water into the
EWH, unscrew the drain stub on drain pipe and open hot water tap. Once the water is
discharged, you can open for a while cold water supply in EWH for additional tank
washing.
When conducting EWH maintenance by forces of specialized organization mark
with the seal of organization performing maintenance shall be made in service coupon.
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