STIEBEL ELTRON DHC series User manual

Simply the Best
USE AND CARE MANUAL
Tankless Electric Water Heaters
Page 1
Simply the Best
17 West St., W. Hatfield, MA 01088 |800.582.8423 |413.247.3380 |fax [phone] |[e-mail] |www.stiebel-eltron-usa.com
! DANGER: ELECTROCUTION
BEFORE PROCEEDING WITH ANY INSTALLATION,
ADJUSTMENT, ALTERATION, OR SERVICE, ALL CIRCUIT
BREAKERS AND DISCONNECT SWITCHES SERVICING
THE APPLIANCE MUST BE TURNED OFF. FAILURE TO DO
SO COULD RESULT IN SERIOUS PERSONAL INJURY OR
DEATH.
! DANGER: ELECTROCUTION
NEVER REMOVE THE APPLIANCE’S COVER UNLESS THE
ELECTRICITY SERVICING THE APPLIANCE IS TURNED OFF.
FAILURE TO DO SO COULD RESULT IN PERSONAL INJURY
OR DEATH.
All Tankless Models
Stiebel Eltron tankless water heaters are designed for a very
long service life. Actual life expectancy will vary with water
quality and use.
In areas with hard water that produces scale, descaling of
the entire unit may be required, and should be performed
as often as necessary. We recommend the Flow-Aide System
(Stiebel Eltron part # 540000) for this procedure. In these
areas, consideration should also be given to installing a filter
that will prevent scale buildup on the cold water supply to
the water heater. We recommend the Scale TAC-ler Water
Conditioner (Stiebel Eltron part # 692442) for this.
Scale and dirt may build up in the filter screen in the unit
and should periodically be removed. Following all directions
and precautions in this manual, regularly clean the filter
screen and replace if necessary. Always shut off power to the
unit at the circuit breakers and water at the unit’s isolation
valves prior to removing the filter screen.
Scale and dirt build up may also occur at the hot water out-
lets served by the unit, such as the faucet aerator, or shower
head. Keeping these filter screens clean will ensure consis-
tent water flow.
CLEANING: Use a damp cloth to clean of the unit’s housing.
Do not use any abrasive or corrosive cleaning agents.
Mini™and Mini™-E Models
Following all directions and precautions in this manual,
regularly clean the filter screen located in the cold water
inlet connection and replace if necessary. Descaling can be
done using a descaling solution or household vinegar.
To access the filter screen in a Mini™, always shut off power
to the unit at the circuit breakers and water at the unit’s
isolation valves prior to removing the filter screen. Then
disconnect the cold water supply at the unit. Remove the
filter screen by reaching up into the cold inlet pipe with a
small flathead screwdriver and while putting pressure on the
inside of the screen’s plastic rim, pull the screen down and
out. Clean and replace the filter screen, or install a new one.
Never run the unit without the filter screen in place.
Filter screen location in Mini™and Mini™-E models
Filter screen
Front of unit
! DANGER: BURNS
WATER TEMPERATURES OVER 125°F (51°C) CAN CAUSE
SEVERE BURNS INSTANTLY OR DEATH FROM SCALDING.
A HOT WATER SCALDING POTENTIAL EXISTS IF THE
THERMOSTAT ON THE APPLIANCE IS SET TOO HIGH.
HOUSEHOLDS WITH SMALL CHILDREN, DISABLED OR
ELDERLY PERSONS MAY REQUIRE THAT THERMOSTATS
BE SET AT 120°F (48°C) OR LOWER TO PREVENT
POSSIBLE INJURY FROM HOT WATER.
CAUTION: OTHER THAN THE FILTER SCREEN, THESE
APPLIANCES DO NOT CONTAIN ANY PARTS SERVICEABLE
BY THE LAY PERSON. IN CASE OF MALFUNCTION, PLEASE
CONTACT A LICENSED PLUMBER OR ELECTRICIAN.
CH
26_02_05_0065_

USE AND CARE MANUAL
Tankless Electric Water Heaters Simply the Best
Page 2
To access the filter screen in an older DHC model, always
shut off power to the unit at the circuit breakers and water at
the unit’s isolation valves prior to removing the filter screen.
Then loosen nut at base of cold water supply tube. (Refer to
the illustration below.) Rotate cold water supply tube coun-
terclockwise 90 degrees and pull towards bottom of unit.
Clean screen and put the screen, the cold water supply tube
and the ground wire back into their original position. Be sure
the ground wire is reinstalled, the ground screw is securely
fastened, and the nut on the cold water supply tube is tight
before the unit is returned to service. Clean and replace the
filter screen, or install a new one, into its original position.
Never run the unit without the filter screen in place.
Simply the Best
17 West St., W. Hatfield, MA 01088 |800.582.8423 |413.247.3380 |fax [phone] |[e-mail] |www.stiebel-eltron-usa.com
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Models prior to 2015
aLocation of ground
wire to be re-
moved
bRotate cold water
supply tube after
nut is loosened
cFilter screen
Models 2015 and newer
Filter screen location in DHC models
Filter screen
DHC Models
The filter screen in DHC models is in one of two locations. In
models from 2015 and newer the screen is located in the cold
water inlet connection, the same as in a Mini™, DHC-E, or
Tempra®. In older DHC models, the filter screen is located in
the top of the cold water supply tube.
To access the filter screen in a newer DHC model, always
shut off power to the unit at the circuit breakers and water at
the unit’s isolation valves prior to removing the filter screen.
Then remove the cold water connection and pull the filter
screen down and out of the unit. Clean and replace the filter
screen, or install a new one, into its original position. Never
run the unit without the filter screen in place.
Continued on next page ›

Simply the Best
USE AND CARE MANUAL
Tankless Electric Water Heaters
Page 3
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The amount of heat put into the water is controlled elec-
tronically in Tempra®and DHC-E models. Using the knob
on the front cover, set the output water temperature to any
temperature between 86°F (30°C) and 140°F (60°C). For
most applications we recommend setting only to the highest
temperature for normal use, typically 108°F (42°C) to 116°F
(47°C) for a shower. This lower setting will increase the life
of the unit.
The outlet temperature of a Tempra®Plus, DHC-E 8/10, or
DHC-E 12 model can be limited to 109°F (43°C). Consult your
installer if your unit has been set to this limit and you require
a higher temperature.
If the “Power” led is flashing on a standard Tempra®, DHC-E
8/10, or DHC-E 12 unit while it is operating, the water flow
rate exceeds the heating capacity of the unit. Reducing the
flow of hot water or setting a lower temperature will let the
unit achieve the set point temperature.
Simply the Best
17 West St., W. Hatfield, MA 01088 |800.582.8423 |413.247.3380 |fax [phone] |[e-mail] |www.stiebel-eltron-usa.com
Filter screen location in DHC-E models
Filter screen location in Tempra® models
Filter screen
Filter screen
Washer
DHC-E Models and Tempra®Models
To access the filter screen in a DHC-E model, always shut off
power to the unit at the circuit breakers and water at the
unit’s isolation valves prior to removing the filter screen.
Then remove the cold water connection and pull the filter
screen down and out of the unit. Clean and replace the filter
screen, or install a new one, into its original position. Never
run the unit without the filter screen in place.
To access the filter screen in a Tempra®model, always shut
off power to the unit at the circuit breakers and water at the
unit’s isolation valves prior to removing the filter screen.
Then remove the cold water inlet connection (right-hand side
when facing unit) and remove the washer (2). Next, pull the
filter screen (1) down and out of the unit with needle nose
pliers. Clean and replace the filter screen, or install a new
one, into its original position along with the washer. Never
run the unit without the filter screen in place.
› Video tutorial:
Cleaning a Filter Screen on Tempra®Water Heaters