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ENGLISH
WWW.STIEBEL-ELTRON-USA.COM SHC 2.5 / SHC 4 / SHC 6 | 7
INSTALLATION
MAINTENANCE INSTRUCTIONS
Freeze protection setting
D0000034989
Temperature setting
The water heater thermostat is factory set at 120°F (49°C).
11. Maintenance Instructions
!
WARNING:
Before servicing or cleaning the water heater, dis-
connect the water heater from the electrical outlet.
The temperature/pressure relief valve must be man-
ually operated once per month. 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 ex-
tremely hot.
Do not attempt to repair the water heater.
Call your licensed plumber or electrician for service. Unplug the
unit whenever the water supply is turned off.
Before calling for service, make sure that:
1 The heater is properly filled.
2 The electrical supply has not been interrupted.
11.1 Descaling the heating element
Approximately every two years, it is advisable to descale the heat-
ing element and to check the condition of the magnesium anode,
replacing it if the diameter is less than 3/8˝ (10 mm). See 11.8,
“Changing the anode rod”, pg. 8.
11.2 Venting the T&P relief valve
It is recommended to install a check valve on the cold water inlet
supply line to the unit so that air pockets can be purged through
the T&P valve. The temperature/pressure relief valve must be
manually operated once per month. Caution should be taken to
ensure that:
1 No one is near the temperature/pressure relief valve dis-
charge pipe.
2 The water discharged will not cause any bodily injury or
property damage. The water may be extremely hot.
11.2.1 T&P venting / testing procedure
1 Before venting, make sure it is known how to shut off the
water supply to the heater. It is not necessary initially, but
may become so if the T&P valve does not reseat properly
when vented, which may cause water to leak.
2 On the top of the T&P valve is a small handle that lifts a pin in
the center of the valve. Lift the handle up so the valve opens,
then release it so it closes. This will vent the T&P valve and at
the same time test if it is functioning correctly.
3 If the valve is stuck so that it does not open or does not close
it should be replaced immediately.
4 The T&P valve may take more than one attempt to reseat cor-
rectly. If this is the case, try re-opening the valve and quickly
releasing it, allowing it to slap shut. This action does not
damage the valve.
5 If after repeated attempts the valve does not reseat properly
and continues to leak water, it should be replaced. If the
valve fails this test it was already malfunctioning and was not
offering the protection needed.
6 Immediately close the cold water inlet to the heater. Replace
the malfunctioning T&P valve with a new one.
Failure to install and maintain a properly functioning and properly
listed temperature/pressure relief valve will release the manufac-
turer and distributor of this water heater from any claim which
might result from excessive temperature or pressure. Regular
venting/testing may increase the life of the valve.
11.3 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 con-
tinue 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.
11.4 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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