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EN
Fig. 2 EWH water connection diagram
EWH
Protective
cover
Flexible hoses
Cold water main
Hot water main
Safety valve
Drainage in the sewers
Flexible hoses
Hot water faucet Cold water faucet
Cold water shut off valve
to points of
consumption
Hot water shut off valve (close
when operating EWH)
7.3.
Possible faults and remedies.
Malfunction
Possible cause How to fix
Hot water pressure from
Clogged inlet safety valve Remove the valve and clean it in
water
Heating time increased THE is covered with a layer of
sludge
Remove the flange and clean the
TEH
Supply voltage decreased
Contact power main
operation service
Powered EWH does not
heat water. No
backlights of indicator
lamps
Thermal switch
tripped.
Wait for safety thermal switch to
lower water temperature in the
tank
Frequent tripping of
thermal switch
The set temperature is close to
the limit
Turn the thermostat control to
decrease temperature (-)
Thermostat tube is covered with
sludge
Remove the flange and gently clean
the pipe from the sludge
6


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