STIEBEL ELTRON SHC 4 - Manual (Page 9)

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www.stiebel-eltron-usa.com SHC 2.5 / SHC 4 | 9
INSTALLATION
Maintenance Instructions
The temperature/pressure relief valve must be manually
operated at least once per year. Caution should be taken
to ensure that:
1. No one is near the temperature/pressure relief
valve discharge pipe.
2. The water discharged will not cause any bodily
injury or property damage. The water may be
extremely hot.
If the valve fails to completely reset and continues to
release water after manual operation, immediately close
the cold water inlet to the heater. Replace the tempera-
ture/pressure valve with a new one.
Failure to install and maintain a properly functioning
and properly listed temperature/pressure relief valve
will release the manufacturer and distributor of this
water heater from any claim which might result from
excessive temperature or pressure.
12.1 Draining the water heater
Some service work requires draining the water heater.
This should be done in the following manner:
1. Unplug the water heater.
2. Open the hot water faucet to let the hot water
out. Let it continue to flow until cold water runs
from the faucet.
3. Turn off the cold water supply to the heater.
4. Close the hot water faucet
5. Disconnect the heater from both the hot and
cold water pipes.
6. Carefully detach the water heater from the wall.
7. Tilt the water heater to drain out the remaining
water.
12.2 Removing the cover
1. Remove the temperature control knob from the
top of the unit.
2. Remove the screws from the cover.
3. Remove the cover by tilting the bottom side and
lifting off the cover. Cover should come right off.
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12.3 Removing the heating element
1. Unplug and drain the water heater (See 12.1,
“Draining the water heater”, pg. 9).
2. Remove the cover (See 12.2, “Removing the
cover”, pg. 9).
3. Disconnect the line wires from the thermostat.
4. Remove the thermostat from the heating
element.
5. Using a suitable wrench, unscrew the heating
element.
6. Remove the heating element from the tank.
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12.4 De-scaling the heating element
Scale deposit can affect the heating capacity of the heat-
ing element. Scale can even cause the element to burn
out. The element can be descaled either chemically or
manually.
1. Remove the heating element (See 12.3, “Remov-
ing the heating element”, pg. 9).
2. To descale chemically, soak the heating element
in white vinegar or other descaling solution,
then rinse well.
3. To descale manually, use a nonmetallic (soft)
tool; brush the crust off the element. Make sure
you do not damage the surface of the heating
element.
4. Reinstall the heating element.
5. Refill the water heater with water and check for
leaks before connecting the power.
12.5 Replacing the heating element
1. Unplug and drain the water heater (See 12.1,
“Draining the water heater”, pg. 9).
2. Remove the cover (See 12.2, “Removing the
cover”, pg. 9).
3. Remove the heating element (See 12.3, “Remov-
ing the heating element”, pg. 9).
4. Install and seal the new element. Make sure
that the heating element is positioned correctly.
5. Remount all the line wires to their original
location.
6. Refill the water heater with water and check for
leaks before connecting the power.