STIEBEL ELTRON DHC 3-1 Instruction Manual

OPERATION AND INSTALLATION
OPERACIÓN E INSTALACIÓN
UTILISATION ET INSTALLATION
Electric Tankless Water Heater
Calentador de Agua Instantáneos sin Tanque
Chauffe-Eau Électrique sans Accumulateur
» DHC 3-1 Classic
» DHC 3-2 Classic
» DHC 4-2 Classic
» DHC 4-3 Classic
»DHC5-2Classic
» DHC 6-2 Classic
» DHC 6-3 Classic
» DHC 8-2 Classic
» DHC 9-3 Classic
»DHC10-2Classic
Certified to ANSI/UL Std. 499
Conforms to CSA Std. E335-1/3E & CSA E60335-2-35
Certificación con ANSI/UL Std. 499
Conforme a CAN/CSA Std. E335-1/3E & CSA E60335-2-35
Certifié à la norme ANSI/UL Std. 499
Conforme à la norme CAN/CSA Std. E335-1/3E
& CSA E60335-2-35
Tested and certified by WQA to NSF/ANSI372
for lead free compliance.
Probado y certificado por WQA NSF/ANSI 372 para
el cumplimiento de las regulaciones sin plomo.
Testé et certifié par WQA à la NSF/ANSI 372 pour une
utilisation sans plomb.

2|DHC CLASSIC WWW.STIEBEL-ELTRON-USA.COM
CONTENTS | OPERATION
SPECIAL INFORMATION
- Read this entire manual. Failure to follow all the guides, in-
structions and rules could cause personal injury or property
damage. Improper installation, adjustment, alteration, service
and use of this unit can result in serious injury.
- This unit must be installed by a licensed electrician and
plumber. The installation must comply with all national, state
and local plumbing and electric codes. Proper installation is
the responsibility of the installer. Failure to comply with the
installation and operating instructions or improper use voids
the warranty.
- Save these instructions for future reference. The installer
should leave these instructions with the consumer.
- If you have any questions regarding the installation, use or
operation of this water heater, or if you need any additional
installation manuals, please call our technical service line at
800.582.8423 (USA and Canada only). If you are calling from
outside the USA or Canada, please call USA 413.247.3380 and
we will refer you to a qualified Stiebel Eltron service represen-
tative in your area.
- The water heater may be used by children aged3 and older
and persons with reduced physical, sensory or mental capabili-
ties or a lack of experience and know-how, provided that they
are supervised or they have been instructed on how to use the
water heater safely and have understood the potential risks.
Children must never play with the water heater. Children must
never clean the water heater or perform user maintenance un-
less they are supervised.
- Ensure the water heater can be separated from the power sup-
ply by a circuit breaker that disconnects all poles with at least
1/8˝ (3mm) contact separation.
- The specified voltage must match the power supply. See the
type plate on the right-hand side of the water heater for full
information.
- The water heater must be properly grounded. See 11.2, “Wir-
ing diagrams”, pg. 10.
- The water heater must be permanently connected to fixed
wiring. For use on an individual branch circuit only. See 11.2,
“Wiring diagrams”, pg. 10.
- Secure the water heater as described in chapter 5, “Mounting
the unit”, pg. 5.
- Observe the maximum permissible pressure (See 11.4, “Data
tables”, pg. 11).
SPECIAL INFORMATION
OPERATION
1. General information ___________________________________________ 3
1.1 Safety information__________________________________________________ 3
1.2 Other symbols in this document_________________________________ 3
2. Safety____________________________________________________________ 3
2.1 Intended use_________________________________________________________ 3
2.2 Safety Precautions__________________________________________________ 3
2.3 Test symbols _________________________________________________________ 4
2.4 Licenses / certificates ______________________________________________ 4
3. Register your product _________________________________________ 4
4. General description ____________________________________________ 4
INSTALLATION
5. Mounting the unit ______________________________________________ 5
6. Water connections _____________________________________________ 6
6.1 Aerator installation at connected faucet _______________________ 6
7. Electrical connection___________________________________________ 6
7.1 DHC 3-2, and DHC 4-2 @208 V electrical connection _______ 7
7.2 Terminal block_______________________________________________________ 7
8. Commissioning _________________________________________________ 7
8.1 Water heater handover ____________________________________________ 7
9. Troubleshooting ________________________________________________ 8
9.1 Flow adjustment screw____________________________________________ 8
9.2 Safety thermal cut-out reset button ____________________________ 8
10. Normal maintenance___________________________________________ 9
11. Technical Data __________________________________________________ 9
11.1 Dimensions___________________________________________________________ 9
11.2 Wiring diagrams ___________________________________________________10
11.3 Temperature increase above ambient water temperature 10
11.4 Data tables __________________________________________________________11
12. Spare parts ____________________________________________________13
13. Warranty _______________________________________________________14

OPERATION
GENERAL INFORMATION
ENGLISH
WWW.STIEBEL-ELTRON-USA.COM DHC CLASSIC| 3
OPERATION
1. General information
The chapters “Special information” and “Operation” are intended
for both users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note
Read these instructions carefully before using the water
heater and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety information
1.1.1 Structure of safety information
KEYWORD Type of risk
Here, possible consequences are listed that may result
from not observing the safety information.
fSteps to prevent the risk are listed.
1.1.2 Symbols. type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.1.3 Keywords
KEYWORD Description
DANGER If this information is not observed, it will result in serious
injury or death.
WARNING If this information is not observed, it can result in serious
injury or death.
CAUTION If this information is not observed, it can lead to medium or
minor injury.
1.2 Other symbols in this document
Note
Notes are bordered by horizontal lines above and below
the text. General information is identified by the symbol
shown on the left.
fRead these notes carefully.
Symbol
!Damage to the water heater and environment
Appliance disposal
2. Safety
Observe the following safety information and regulations.
Operate the water heater only when fully installed and with all safety
equipment fitted.
2.1 Intended use
The water heater is intended for heating domestic hot water and can
supply one draw-off point.
The DHC Classic can be used for hand washing type applications in
the U.S. and Canada:
- Restroom sinks in commercial/industrial facilities and homes
- Kitchen areas in commercial /industrial facilities and homes
- Special uses in photo developing shops, laboratories etc.
The DHC Classic can also be used for whole apartments and homes in
warm climate zones such as the Caribbean region, Central America,
and Mexico due to the higher incoming water temperatures.
Any other use beyond that described shall be deemed inappropri-
ate. Observation of these instructions and of the instructions for any
accessories used is also part of the correct use of this water heater.
2.2 Safety Precautions
!DANGER: Injury
Please read and follow these instructions. Failure to fol-
low these instructions could result in serious personal
injury or death.
!Damage to the water heater and the environment
The water heater must be installed by a licensed electri-
cian and plumber. The installation must comply with all
national, state and local plumbing and electric codes.
Service of the water heater must be performed by qualified
service technicians.
!

4|DHC CLASSIC WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
REGISTER YOUR PRODUCT
DANGER: Electrocution Before beginning any work on the electric installation, be
sure that main breaker panel switches are "off" to avoid
any danger of electric shock. All mounting and plumb-
ing must be completed before proceeding with electri-
cal hook-up. Where required by local, state or national
electrical codes the circuits should be equipped with a
"ground fault interrupter".
The unit must be properly grounded in accordance with
state and local codes, or in absence of such codes, in
accordance with national electric code or the Canadian
electric code. Failure to electrically ground the product
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.
DANGER: Burns Water temperatures over 125 °F (52°C) can cause severe
burns instantly or death from scalding. A hot water scald-
ing potential exists if the thermostat on the water heater
is set too high. Households with small children, disabled
or elderly persons may require that the thermostat be
set at 113 °F (45 °C) or lower to prevent possible injury
from hot water.
!WARNING: Injury
Where children or persons with limited physical, sensory
or mental capabilities are to be allowed to control this
water heater, ensure that this will only happen under
supervision or after appropriate instructions by a person
responsible for their safety. Children should be super-
vised to ensure that they never play with the water heater.
WARNING Electrocution
The connection to the power supply is only permissible
as a permanent connection in conjunction with a ¾˝
Romex clamp. Ensure the water heater can be separated
from the power supply by an isolator that disconnects
all poles with at least 1/8˝(3mm) contact separation.
!Material losses
The user should protect the water heater against frost.
2.3 Test symbols
See type plate on the water heater.
2.4 Licenses / certificates
- UL (USA) Std. 499
- CSA (Canada) Std. E335-1/3E, and CSA E60335-2-35
3. Register your product
You must register this product within 90 days of pur-
chase on our web site in order to activate the standard
warranty or to be eligible for the extended warranty.
Go to our web site at www.stiebel-eltron-usa.com and
click on register your product.
Before beginning the registration process, we suggest that you
gather the necessary information which will be as follows:
Type, Example: DHC 3-1 Classic (from the label that is on the
unit)
Number listed after "Nr."
Place of Purchase
Purchase Date
First & Last Name
Email address
Physical Address
Phone Number
Installation Date
If you have any questions concerning the registration process or
warranty options, please contact Stiebel Eltron USA directly at
800.582.8423.
4. General description
The DHC Classic tankless water heater differs from conventional
storage type water heaters in several ways. It does not store hot
water. Instead, water is heated instantaneously as it flows through
the unit. The powerful heating elements are activated by a flow
switch as water is drawn from a hot water faucet connected to the
DHC Classic. Due to the absence of stand-by losses, the DHC Classic
has greater energy efficiency than storage type water heaters.
The temperature of the hot water delivered by the DHC Classic de-
pends on the wattage of the heating element, the temperature of
the incoming cold water, and the water flow rate through the unit.
In order for the DHC Classic to operate properly, it must be carefully
matched to the application.
In case you have questions regarding the way you plan to use the DHC
Classic, please call our technical service line at 800.582.8423 (USA and
Canada). For service outside the U.S. and Canada, please call us at
USA 413.247.3380. You can also e-mail us at info@stiebel-eltron-usa.
com or fax us at 413.247.3369.

ENGLISH
WWW.STIEBEL-ELTRON-USA.COM DHC CLASSIC| 5
INSTALLATION
MOUNTING THE UNIT
INSTALLATION
5. Mounting the unit
D0000089950-a
6
5
13
2
7
4
1 Electrical junction box
2 1/2˝ water supply line for faucet installation
3 Shut-off valve
4 Cold water supply
5 Sink
6 Cold valve (right)
7 Hot valve (left)
DANGER: Electrocution The unit must be installed in a vertical position with the
water fittings pointing downward. Do not install unit
where it would routinely be splashed with water. Elec-
tric shock may result.
1. Install DHC Classic as close as possible to the hot water draw-
off point, for example, directly underneath the sink.
2. Install DHC Classic in a frost free area. If frost may occur, re-
move unit before freezing temperatures set in.
3. Leave a minimum of 5˝ of clearance on all sides for servicing.
4. Remove plastic cover by loosening the screw on the bottom.
Lift cover off from the bottom. When reinstalling, insert the top
of the cover into the rear housing first, then tilt the bottom into
place. Re-tighten the cover screw.
D0000089949-b
5. Mount the unit securely to wall by putting two screws through
the mounting holes. Screws and plastic wall anchors for
mounting on drywall or wood are provided.
D0000089951-a

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INSTALLATION
WATER CONNECTIONS
6. Water connections
!NOTICE:
Excessive heat from soldering on copper pipes near the DHC
Classic may cause damage.
The cold water connection to the unit must be disconnected
periodically in order to clean the filter screen. It is required
to use water connections that are easily detachable such as
braided steel flex connectors.
!NOTICE:
Hard water or water with a high mineral count may dam-
age the unit. Damage to the unit caused by scale or a high
mineral count is not covered under the warranty.
1. All plumbing work must comply with national and applicable
state and local plumbing codes.
2. A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 psi (10 bar).
3. Make certain that the cold water supply line has been flushed
to remove any scale and dirt.
4. Install shut-off valve in cold water line as shown in illustration.
This allows the unit to be isolated for maintenance purposes.
5. Cold water connection (inlet) is on the right side of the unit, hot
water connection (outlet) is on the left side of unit.
6. Tankless water heaters such as the DHC Classic are not required
to be equipped with a Temperature and Pressure Relief Valve
(T&P). If the local inspector will not pass the installation with-
out a T&P, it should be installed on the hot water outlet side of
appliance.
7. The DHC Classic’s hot water outlet is designed for connection
to copper tubing, PEX tubing or a braided stainless steel hose
with a ½˝ NPT female tapered thread.
8. The plumbing on the cold water inlet side needs to be such
that it can easily be removed to allow access to the inlet filter
screen. The easiest way to achieve this is to use a braided steel
flex connector. If soldering near the unit is necessary, please
direct the flame away from the housing of the unit in order to
avoid damage. Note that excessive heat from soldering near
the cold water inlet fitting may damage the plastic filter screen
located inside it.
9. When all plumbing work is completed, check for leaks and take
corrective action before proceeding.
6.1 Aerator installation at connected faucet
DHC 3-1, 3-2, and 4-2 Classic models ship with a 0.5 gpm pressure
compensating flow-reducer/aerator that must be installed on the
faucet the water heater is connected to. Failure to install the aerator
may result in lower water temperatures than desired.
7. Electrical connection
DANGER: Electrocution Before beginning any work on the electric installation, be
sure that main breaker panel switches are “off” to avoid
any danger of electric shock. All mounting and plumb-
ing must be completed before proceeding with electri-
cal hook-up. Where required by local, state or national
electrical codes the circuits should be equipped with a
“ground fault interrupter.”
The unit must be properly grounded in accordance with
state and local codes, or in absence of such codes, in
accordance with national electric code or the Canadian
electric code. Failure to electrically ground the product
could result in serious personal injury or death.
WARNING Electrocution
The connection to the power supply is only permissible
as a permanent connection in conjunction with a ¾˝
Romex clamp. Ensure the water heater can be separated
from the power supply by an isolator that disconnects
all poles with at least 1/8˝(3mm) contact separation.
1. All electrical work must comply with national and applicable
state and local electrical codes.
2. The DHC Classic should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In installa-
tions with several DHC Classic units, each unit requires an
independent circuit. Please refer to the technical data table for
the correct wire and circuit breaker size.
3. A ¾˝ Romex clamp (required, not supplied) should be installed
in the opening located between the hot and cold water con-
nections. The wire should be fed through the Romex clamp.
The “live” wires must be connected to the slots on the terminal
block marked N and L (DHC 3-1, 4-3, 6-3, 9-3 Classic only) or L
and L (all other versions). The ground wire must be connected
to the slot marked with the ground symbol.
2.2“ (56 mm)
D0000089948-a
4. Reinstall plastic cover. When reinstalling, insert the top of the
cover into the rear housing first, then tilt the bottom into place.
Re-tighten the cover screw.

ENGLISH
WWW.STIEBEL-ELTRON-USA.COM DHC CLASSIC| 7
INSTALLATION
COMMISSIONING
7.1 DHC 3-2, and DHC 4-2 @208 V electrical connec-
tion
A 3/8˝ diameter rubber grommet is supplied as part of the required
electrical installation with DHC 3-2 and DHC 4-2 Classic units.
1. When installing the DHC 3-2 Classic at either 208 or 240 V, or
the DHC 4-2 Classic at 208 V, first feed the 14 AWG wire through
the supplied rubber grommet. Prepare the wires according to
the diagram:
2.2˝ (56 mm)
B
C
2.2˝ (56 mm)
A
3/8˝diameter
grommet
2. A ¾˝ Romex clamp (required, not supplied) should be installed
in the opening located between the hot and cold water con-
nections. The wire with the rubber grommet in place should be
fed through the Romex clamp. The “live” wires must be con-
nected to the slots on the terminal block marked L and L. The
ground wire must be connected to slot marked with the ground
symbol.
3. Reinstall plastic cover. When reinstalling, insert the top of the
cover into the rear housing first, then tilt the bottom into place.
Re-tighten the cover screw.
7.2 Terminal block
Consult the chart below for the recommended torque amounts on
the terminal block screws.
Screw Size (mm) Min. Torque (N•cm) Min. Torque (lbf•in)
M5 150-200 13.3-17.7
Using the proper torque specifications to secure wire to the wiring
block helps to avoid personal loss or property damage.
8. Commissioning
!WARNING:
Open hot water faucet for a few minutes until water flow
is continuous and all air is purged from water pipes. The
unit’s cover must be installed before the circuit breakers
are turned on.
1. Vent the air from pipes and the water heater by opening the
hot water faucet for a few minutes, until water flow is continu-
ous and all air is purged from the water pipes.
2. Turn on circuit breaker to bring electrical power to the unit.
3. Open hot water faucet to a degree so that water flow is typical,
i.e. until the water flow is the same as that encountered during
normal use.
4. Wait twenty seconds until temperature has stabilized. Then
check water temperature. If temperature is too low, the water
flow rate needs to be reduced. In order to do this, turn off
the unit’s circuit breaker, remove the cover and turn the flow
adjustment screw shown in illustration clockwise ½ turn (180
degrees) See 9.1, “Flow adjustment screw”, pg. 8. Then
reinstall plastic cover, turn on circuit breaker and check water
temperature. This procedure should be repeated until the de-
sired temperature is achieved. In case the water temperature
is too high, turn the flow adjustment screw counter clockwise
in the same manner until the desired temperature is achieved.
The arrows in the illustration refer to the water temperature.
5. In order to obtain temperature control at a single spout mixer-
type faucet, restrict cold water flow to faucet by partially clos-
ing the cold water shut-off valve under the sink until cold water
and hot water flow rates are approximately the same.
8.1 Water heater handover
Explain the functions of the water heater to the user. Draw special
attention to the safety information. Hand the operating and instal-
lation instructions to the user.

8|DHC CLASSIC WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TROUBLESHOOTING
9. Troubleshooting
Symptom Possible cause Solution
No hot water but audible click can be heard when
water is turned on.
Circuit breaker off Circuit breaker on
Safety thermal cut-out tripped Reset thermal cut-out
Heater may be undersized See 11.3, “Temperature increase above ambient water tem-
perature”, pg. 10
No hot water and no audible click can be heard when
water is turned on
Water flow too low to activate flow switch Clean faucet aerator
Open shut-off valve completely
Increase flow by opening flow adjustment screw (turn coun-
terclockwise)
Clean filter screen at DHC unit. See 10, “Normal maintenance”,
pg. 9
Water not warm enough Water flow too high
Reduce water flow by closing flow adjustment screw (turn
clockwise). See 11.3, “Temperature increase above ambient
water temperature”, pg. 10
Voltage too low Supply correct voltage to unit
If you are not able to resolve a problem please contact us toll free
at 800.582.8423 before removing the unit from the wall.
Stiebel Eltron is happy to provide technical assistance. In most in-
stances, we can resolve the problem over the phone.
9.1 Flow adjustment screw
To lower the water temperature or increase water flow, open the
flow adjustment screw by turning counterclockwise (-). This de-
creases the water temperature by increasing water volume.
To raise the water temperature or reduce water flow, close the flow
adjustment screw by turning clockwise (+). This increases the water
temperature by decreasing water volume.
26_02_02_1358
9.2 Safety thermal cut-out reset button
DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of this
water heater unless power to the unit has been com-
pletely shut off at the circuit breakers.
26_02_02_1357

ENGLISH
WWW.STIEBEL-ELTRON-USA.COM DHC CLASSIC | 9
INSTALLATION
NORMAL MAINTENANCE
10. Normal maintenance
WARNING Electrocution
Before performing any work on the water heater, ensure
power to the unit has been completely shut off at the
circuit breaker.
!
NOTICE:
Hard water or water with a high mineral count may dam-
age the unit. Damage to the unit caused by scale or a high
mineral count is not covered under the warranty.
Note:
Other than the filter screen, the DHC Classic does not con-
tain any parts serviceable by the lay person. In case of mal-
function please contact a licensed plumber or electrician.
Stiebel Eltron DHC Classic tankless water heaters are designed for
a very long service life. Actual life expectancy will vary with water
quality and use. To ensure consistent water flow, it is recommended
to periodically remove scale and dirt that may build up at the aerator
of the faucet or in the shower head.
The DHC Classic has a built in sediment filter screen that should be
cleaned periodically:
fTurn off power to the water heater at the circuit breaker.
fTurn off the water supply to the water heater at the shut-off
valve.
fOpen a connected hot water tap to relieve built-up pressure
(this will minimize leakage when removing the connection from
the cold water inlet).
fDisconnect the braided steel flex connector from the cold water
inlet fitting (right).
fTo remove the filter screen from the bottom of the cold water
inlet, carefully insert a flathead screwdriver just above the
plastic lip of the filter screen, and gently pull downward.
fClean the filter screen, re-insert securely into the cold water
inlet fitting, and reconnect the braid steel flex connector to the
cold water inlet.
fOpen the cold water supply shut-off valve.
fVent the air from pipes and the water heater by opening the
hot water faucet for a few minutes, until water flow is continu-
ous and all air is purged from the water pipes.
fTurn on circuit breaker to bring electrical power to the unit.
11. Technical Data
11.1 Dimensions
c06 c01
c01
c06
715/16Ý(202)
315/16Ý(100)
13/8Ý(35)
37/8Ý(98)
143/16Ý(360)
½Ý(13)
b01
19/16Ý(40)
Mounting holes, rear cover
125/8Ý(320)
D0000089946-c
b01 electrical supply cable
c01 cold water connection 1/2˝ NPT
c06 hot water connection 1/2˝ NPT

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INSTALLATION
TECHNICAL DATA
11.2 Wiring diagrams
DHC 3-2 Classic, DHC 4-2 Classic, DHC 5-2 Classic
A 2/GND ~ 208 / 240 V
DHC 4-3 Classic
B 1/N/GND ~ 277 V
LL
A
V
NL
B
85_02_02_0008
DHC 6-2 Classic, DHC 8-2 Classic, DHC 10-2 Classic
A 2/GND ~ 208 / 240 V
DHC 6-3 Classic, DHC 9-3 Classic
B 1/N/GND ~ 277 V
DHC 3-1 Classic
B 1/N/GND ~ 120V
V
LL
NL
85_02_02_0009
A
B
11.3 Temperature increase above ambient water tem-
perature
[ °F ]
Type kW GPM (gallons per minute)
0.32 0.43 0.48 0.53 0.69 0.80 1.0 1.5 2.0
DHC 3-1 3.0 65 49 43 41 30 26 20 14 10
DHC 3-2 2.5 54 40 35 34 25 21 17 11 9
3.3 71 53 47 45 33 28 22 15 11
DHC 4-2 2.9 –47 41 40 29 25 20 13 10
3.8 –61 54 52 38 33 26 17 13
DHC 4-3 4.5 –73 64 61 45 39 31 20 15
DHC 5-2 3.6 –58 51 49 36 31 25 16 12
4.8 –77 68 65 48 41 33 22 16
DHC 6-2 4.5 – – 64 61 45 39 31 20 15
6.0 – – 85 82 60 52 41 27 20
DHC 6-3 6.0 – – 85 82 60 52 41 27 20
DHC 8-2 5.4 ––––54 46 37 25 18
7.2 ––––71 62 49 33 25
DHC 9-3 9.0 -----77 58 41 31
DHC 10-2 7.2 – – - – – 62 49 33 25
9.6 – – - – – 82 65 44 33
Min. water flow to activate unit
[ °C ]
Type kW l/min (liters per minute)
1.2 1.6 1.8 2.0 2.6 3.0 4.0 5.0 7.5
DHC 3-1 3.0 36 27 24 22 17 14 11 9 6
DHC 3-2 2.5 30 22 20 18 14 12 975
3.3 39 30 26 24 18 16 12 9 6
DHC 4-2 2.9 –26 23 21 16 14 10 8 6
3.8 –34 30 27 21 18 14 11 7
DHC 4-3 4.5 –40 36 32 25 22 16 13 9
DHC 5-2 3.6 –32 29 26 20 17 13 10 7
4.8 –43 38 34 26 23 17 14 9
DHC 6-2 4.5 – – 36 32 25 22 16 13 9
6.0 – – 48 43 33 29 22 17 11
DHC 6-3 6.0 – – 48 43 33 29 22 17 11
DHC 8-2 5.4 ––––30 26 19 15 10
7.2 ––––40 34 26 21 14
DHC 9-3 9.0 -----43 32 26 17
DHC 10-2 7.2 –––––34 26 21 14
9.6 –––––46 34 28 18
Min. water flow to activate unit