Siemens 6 720 820 351, Installation And Operating Instructions Manual, Page: 12 / 44

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Water connection
■ Caution!
The existing fitting may not be covered with scaling.
■ Do not grease the thread!
Info: Replacement for damaged threaded nozzles available
from customer service.
IV. Undersink appliances DO05705M,
DO3170D5M and DO05705CHM
■ Fit the taps if required (A1 and A2).
■ Insert the seals (B1).
■ Ensure the axial fit of the connection pipes in the nozzles.
■ Place the union nuts on the thread and tighten them by
hand (B2).
■ Tighten the screw fitting (C). Counter the threaded noz-
zles on the warm water heater with a wrench
■ After the unit has been used to heat water a few times,
retighten the screw fitting.
V. Oversink appliances DO05805M and
DO05805CHM
■ Install the mixer if required (D1 to D3).
■ Insert the pipe connections to the mixer with seals (E).
Ensure the axial fit of the connection pipes in the nozzles.
■ Insert the seals on the pipe connection (F1).
■ Suspend the appliance (G).
■ Place the union nut (F2) on the thread and tighten it by
hand.
■ Tighten the screw fittings (H1 and H2). Counter the
threaded nozzles on the warm water heater with a
wrench (H1).
First start-up
Electrical connection
■ Important: Do not insert the plug into the mains socket
yet.
■ Fill the appliance with water first. Water must flow from
the fitting.
■ Only then insert the plug into the mains socket.
Note: If the appliance is not filled with water, the resettable
safety temperature limitation will trip!
Checking the heating
■ Turn the rotary selector switch to “III” (approx. 85 °C).
■ Monitor the heating process until the pilot lamp switches
off after approx. 12 ‒ 18 minutes.
■ Check the temperature.
■ Caution: If the safety temperature limitation has switched
off the small water heater, unplug the mains plug, open
the warm water tap and allow approx. 4 litres of water to
flow. Then plug the mains plug back in.
The appliance is ready again for operation.
Limitation of the water temperature
The temperature of the water leaving the tap for the small wa-
ter heater can be mechanically set to stage “I” (approx. 38 °C)
or stage “e” (approx. 60 °C) (see “Operation”, page 14).
Conserving energy
■ Set the rotary selector to “e” to conserve energy.
■ Hand over the installation and operating instructions to
the user and explain how the appliance operates.