Stiebel-eltron SHC 4 User Manual download pdf (Page 5)

– 5 –

English

thermostat to position “E”. Position “E” on the

thermostat represents approximately 125 °F .

11 Maintenance

instructions



WARNING: BEFORE SERVICING OR

CLEANING THE WATER HEATER,

DISCONNECT THE WATER HEATER FROM THE

ELECTRICAL OUTLET.

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.

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 ﬁ lled

2. The electrical supply has not been

interrupted.

Approximately once per year, it is advisable to

descale the heating element and to check the

condition of the magnesium anode, replacing it

if the diameter is less than .39” (10 mm). (See

changing the anode rod).

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 after manually operating it, the valve fails

to completely reset and continues to release

water, immediately close the cold water inlet to

the heater. Replace the temperature/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.

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 ﬂ ow 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.

Removing the cover (SHC 2.5)

1. Remove the temperature control knob from

the front of the unit.

2. Remove the screw from the bottom of the

cover.

3. Remove the cover by lifting the back and

pulling forward. Cover should come right off.

Removing the cover (SHC 4)

1. Remove the temperature control knob from

the front of the unit.

2. Remove the screw from the bottom of the

cover.

3. Remove the ﬁ ve screws from the bottom of

the cover.

4. Remove cover by lifting front and pulling

forward. Cover should come right off.

Removing the heating element

1. Unplug and drain the water heater

(see draining instructions).

2. Remove the cover.

3. Remove all the line wires from the heating

element.

4. Remove the ﬁ tting on top of the heating

element pipe.

5. Using a suitable wrench, unscrew the 2nd

nut.

6. Remove the heating element.

De-scaling the heating element

Scale deposit can affect the heating capacity

of the heating 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 above).

2. To de-scale chemically, soak the heating

element in white vinegar or other descaling

solution then rinse well.

3. To de-scale 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. Reﬁ ll the tank before turning on the power to

the water heater.

Replacing the heating element

1. Unplug and drain the water heater (see

draining instructions).

2. Remove the cover (see removing cover

instructions).

3. Remove the heating element (see removing

heating element instructions).

4. Install a new element and new gasket. Make

sure that both the gasket and heating element

are positioned correctly.

5. Remount all the line wires from the heating

element to their original location.

Changing the anode rod

A magnesium anode is used to extend the life

of the tank. Permanent removal of this anode

for any reason will void the warranty.

Depending on conditions, the magnesium

anode rod may need to be changed every year

or so. Galvanic and electrolytic corrosion can

destroy a tank with a spent anode rod. Rusty

water is usually an indicator of a spent anode

rod.

1. Unplug and drain the water heater

(see draining instructions)

2. Remove cover (see removing cover

instructions)

3. Remove heating element (see removing the

heating element instructions)

4. Remove the anode rod from the dismounted

heating element holder by unscrewing the

female screw

5. Fit a new anode rod into the heating element

holder

6. Reﬁ t all the wires and the heating element

7. Reﬁ ll the water heater with water and check

for leaks before connecting the power

Safety Shut-off



WARNING: NEVER LOCK THE SLIDING

RESET PLUNGER.

DANGER: WATER TEMPERATURES OVER 125

°F CAN CAUSE SEVERE BURNS INSTANTLY OR

DEATH FROM SCALDING. DO NOT ATTEMPT

TO RESET THE HIGH LIMIT SWITCH WITHOUT

FIRST COOLING DOWN THE WATER INSIDE

THE WATER HEATER.

Resetting high temperature shut off system

1. Unplug the water heater

2. Remove the cover (see removing the cover

instructions)

3. Press in red button with an appropriate tool.

(See diagrams on next page)

4. Replace the cover of the heater and tighten

5. Replace the thermostat control knob

During heating, the water volume and water

pressure increases in the tank. It is possible

for water to leak from the safety valve, this is

normal.

1 2 3 4 5 6

Comments to this Manuals

No comments

Stiebel-eltron SHC 4 User Manual Page 5

Comments to this Manuals

Related products and manuals for Water boiler Stiebel-eltron SHC 4