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operating
START-Up | mAINTeNANCe AND CleANINg | fAIlUReS - CAUSeS
1.
Operating instructions for Users and Technicians
Stiebel Eltron hot water heaters should only be installed by
!
licensed installers. These are not do-it yourself appliances.
Please hand this Operating and Installation Manual and hand over to
the home or buildings owner when the installation is completed.
1.1 Start-up
The solar collectors, the boiler, the tank, and the pumping/control
station form a complete system.
Hot water is generated throughout the year by the solar collectors.
The entire heater and hot water system must be filled with water and
have adaquate air ventilation. Please, refer to the solar collector's and
the boiler's installation instructions.
1.2 Maintenance and Cleaning
Routine care and maintenance extends the life expectancy and
operating safety of the hot water storage unit.
The outer casing should be cleaned with a slightly damp cloth and
commercially available neutral cleaning agent, this should be done on a
regular basis
1.3 Failures – Causes – Correction
Failures
Inadequate water pressure
Hot water flow inadequate
Hot water storage tank not being heated
Outlet quantity
Hot water supply too fast exhausted
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Temperature/Pressure Relief Valve
The proper function of the T & P relief valve is required to prevent
damage to the hot water storage unit. The T & P valve needs to be open
during cold-water addition. The water has to flow from the relief line at
full stream.
!
Decalcification
With hard tap water, a deposit of scale will form on the inside of the
storage unit. Based on professional experience, it is necessary to decal-
cify with commercially available solvents at timely intervals. Follow the
manufacturers instructions for solvent use. The hot water storage unit
needs to be emptied. The inspection cover must be removed and sedi-
ments on the tank bottom must be flushed.
Replacement of the Sacrificial Anode
Depending on the composition of the tap water, an inspection of the
sacrificial anode (Pos. 1, Diagram A) timely intervals is recommended.
The sacrificial anode turns red when the anode has been spent. Please
notify your local contractor who will replace the anode.
With heavy wear, an original equipment replacement anode must be
installed to protect the inner container from corrosion. An inspection
should be performed at least once a year.
Causes
Shut-off valve is not completely open..
Cold or hot water line is obstructed.
Boiler temperature is set too low.
Recommended 176 to 185º F (80 - 85 °C)
The heat exchanger is calcified.
Program selection at the heater control is
not properly selected.
Aerator at the extraction point blocked.
Flow rate too high.
Recommended 2.6-3.9 gal./min. (10 - 15 l/min)
The discharging water can be hot.
Correction
Open Shut-off valve.
Clean or exchange pipes
Set boiler to recommended temperature.
Clean the heat exchanger
Select and set program per instructions.
Unscrew aerator and clean.
Restrict Spigot valve rate.
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