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discharge in an area where any remaining hot water
will not cause any damage or injury.
b. Open the drain valve to flush any sediment out of the
bottom to the heater.
c. Shut off the cold water supply. Make sure all hot
water fixtures and circulating pumps are turned off.
d. Wait for water flow from the hose to stop. Remove
the anode using a socket of the appropriate size. Do
not use an impact wrench.
e. Inspect and replace the anode as required. Use pipe
tape or sealant when reinstalling the anode.
f. Close the drain valve. Open a hot water fixture to
allow air to escape. Open the cold water supply to
the heater and allow the tank to fill.
g. Check your anode and drain valve for leaks.
h. Turn the water heater electricity on for the zone
containing the Single-wall Indirect.
4. Sediment (Annual, but harsh water quality may
dictate more frequent service)- Depending on water
conditions, a varying amount of sediment may collect in the
tank. Levels requiring service are indicated by a small
temperature difference in the supply and return lines (See
also “Scale” below). Repeated flushing usually clears such
material. As a preventive measure, water should be drawn
from the tank at the drain valve until it runs clear.
5. Scale (Annual)- Hard water may cause scale to build-up
on the outside of the heat exchanger coil. A water softener
will prevent this problem (See also “Sediment” above).
Symptoms would be reduced recovery capacity or reduced
temperature differential between boiler supply and return
lines. Repeated flushing should resolve the problem.
INTERNET VERSION FOR REFERENCE ONLY