STIEBEL ELTRON CF 12 KW Instruction Manual

OPERATION AND INSTALLATION
ELECTROMECHANICALLY CONTROLLED INSTANTANEOUS WATER HEATER
Conforms to ANSI/UL Std. 499
Certified to CAN/CSA Std. C22.2 No.88
» CF 12 KW
» CF 15 KW
» CF 18 KW
» CF 24 KW
» CF 27 KW
» CF 36 KW
» CF 48 KW
» CF 54 KW
» CF 60 KW
» CF 72 KW
» CF 81 KW
» CF 90 KW
» CF 108 KW
» CF 120 KW
» CF 144 KW

2| CF SERIES WWW.STIEBEL-ELTRON-USA.COM
CONTENTS | OPERATION
OPERATION
1. General information
Read this entire manual. Failure to follow all the guides, instructions
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 plumb-
ing 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 opera-
tion 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 representative in your area.
!This is the safety alert symbol. It is used to alert you to
potential personal injury hazard. Obey all safety mes-
sages that follow this symbol to avoid possible injury or
death.
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 or scalding
OPERATION
1. General information ___________________________________________ 2
1.1 Safety information__________________________________________________ 2
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 _________________________________________________________ 3
2.4 Licenses / certificates ______________________________________________ 3
3. Functional characteristics_____________________________________ 4
4. Troubleshooting ________________________________________________ 5
4.1 Fault table____________________________________________________________ 5
4.2 Solutions based on symptoms in fault table __________________ 5
4.3 Cold element resistivity by heater type (in Ohms) ___________ 5
5. Mounting the water heater ___________________________________ 6
5.1 Mounting _____________________________________________________________ 6
6. Water connections _____________________________________________ 6
6.1 Venting the air_______________________________________________________ 6
6.2 Leakage check _______________________________________________________ 7
7. Electrical connection___________________________________________ 7
7.1 Safety__________________________________________________________________ 7
7.2 Electric supply_______________________________________________________ 7
7.3 Terminal block torque _____________________________________________ 7
8. Commissioning _________________________________________________ 7
9. Maintenance ____________________________________________________ 7
10. Technical data __________________________________________________ 8
10.1 Dimension drawings _______________________________________________ 9
10.2 Wiring diagrams ___________________________________________________12
10.3 Maximum temperature rise _____________________________________24
11. Spare parts and service advice______________________________25
12. Warranty _______________________________________________________27

WWW.STIEBEL-ELTRON-USA.COM CF SERIES | 3
ENGLISH
OPERATION
SAFETY
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
fThis symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
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 several draw-off points.
Any other use beyond that described shall be deemed inappropriate,
and may void the manufacturer’s warranty.
Observation of these instructions 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 follow 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 electrician
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.
DANGER: Electrocution
Before proceeding with any installation, adjustment, al-
teration, or service of the water heater, all circuit breaker
switches servicing the water heater must be turned off.
Make sure that nobody can activate the breaker in the
distribution panel during your service work on the water
heater.
DANGER: Electrocution
The water heater must be properly grounded. Failure to
electrically ground the product could result in serious
personal injury or death.
DANGER: Electrocution
Never open the water heater cover unless the electricity
servicing the water heater is turned off.
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 supervised to ensure that they never
play with the water heater.
2.3 Test symbols
See the type label on the water heater.
2.4 Licenses / certificates
- UL (USA) Std. 499: 2014 Ed.14
- CSA (Canada) Std. CSA C22.2#88 issue:1958/09/01 (R2013)

4| CF SERIES WWW.STIEBEL-ELTRON-USA.COM
3. Functional characteristics
The well-insulated CF is an electromechanically temperature con-
trolled water heater. Stainless steel heat exchangers heat water as it
passes through in meandering loops. Each loop contains an element
arrangement. The number of loops depend on the capacity size of the
heater. There are 3-, 6-, 12-, 18-, and 24-element versions of the CF.
Each element (1) is controlled by a separate thermostat (2) with a
customized fixed temperature setting (90, 110, 125, 145, 155, 185°F
(32, 43, 52, 63, 68, 85 °C)). Once the water temperature equals the
thermostat set point temperature, the corresponding element is
switched off. Based on flow rate and the required temperature rise,
water is heated on-demand and no energy is wasted.
A pressure sensor switch (3) is installed in the first chamber to
eliminate any possibility of dry firing.
The delay timer (4) is user adjustable with up to 8 minutes of delay
time. This feature allows air to be purged from the system before
the element arrangement is activated to heat.
The element power supply comes from the contactor (5) over an
individual element fuse. The contactor coil is activated once the
heating on/off switch (6) is turned on, the water pressure is more
than the pressure switch threshold, and the timer delay has expired.
Additional safety is provided by individually-fused elements (the
fuses are located in the fuse box (7)), the pressure relief valve (8),
and the air vent device (9).
The transformer (10) feeds the heater on/off (11) indicator lamp.
The heater on/off (12) indicator lamp will light up once the power
supply is activated.
The hot water supply (13) and the water inlet side (14) each include
a ball valve. The knockout (15) supports the electric wires for elec-
trical hookup.
1
8
23
14
6
11
12
4
5
15
910
13
7
1 Element
2 Individual element thermostat
3 Pressure sensor switch
4 Delay timer
5 Contactor
6 On/off switch
7 Fuse box
8 Pressure relief valve
9 Air vent
10 Transformer
11 On/off indicator lamp
12 On/off indicator lamp
13 Ball valve, hot water supply side
14 Ball valve, inlet water supply side
15 Wire support knockout
OPERATION
FUNCTIONAL CHARACTERISTICS

WWW.STIEBEL-ELTRON-USA.COM CF SERIES | 5
4. Troubleshooting
Before troubleshooting, check the following items:
fIs the water pressure more than 3 psi (0.21 bar)?
fIs the electric supply a:
- Wye (4 wires + ground) or
- Delta (3 wires + ground)?
fDoes the electric supply match the voltage and configuration
designation shown on the unit nameplate?
fIf the heater fails to maintain the desired temperature, check
the flow rate according to the table See 10.3, “Maximum tem-
perature rise”, pg. 24.
The following items are required for testing to diagnose a possible
failure:
Continuity tester, 600 V voltage meter, amp and Ohm meter.
Use the following steps for diagnosis:
fTurn off the power supply to the heater.
Caution: follow all safety precautions in 2.2, “Safety precau-
tions”, pg. 3.
fTurn off the heater on/off switch (6).
fOpen the heater enclosure.
fCheck for any loose connections, and properly operating
breakers.
fTurn the delay switch timer (4) knob all the way to the left.
fPurge the heater to allow it to cool down and reset the
thermostat.
fTurn the main breaker back on. Turn on the heater on/off
switch (6). For a resistivity test, turn the breaker off and check
voltage just in case.
4.1 Fault table
Symptom Possible cause Action
No hot water (A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
Circuit breakers off Turn circuit breakers on
On/off switch (6) defect Check voltage
Delay timer (4) defect Check voltage
Pressure switch (3) Check voltage
Contactor (5) Check voltage A1-A2
Transformer (10) Check voltage X1-X2
Check voltage H1-H4
Thermostat (2) Check voltage
Fuse (7) Check voltage
Element (1) Check resistivity
Reduced (J)
hot water (K)
(L)
Ball valve closed (13, 14) Open ball valve
Filter clogged Clean filter
Air in the system Vent the system
Lukewarm (M)
water (N)
Fuse burned (7) Check continuity
Element failure (1) Check amperage
4.2 Solutions based on symptoms in fault table
Symptom Analysis Solution
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)(M)
(I)(N)
No power Activate power
No continuity Replace on/off switch (6)
No continuity Replace delay timer (4)
No continuity Replace pressure switch (3)
A1-A2> 100 V, < 100 V T1-T3Replace contactor (5)
H1-H4> 200 V, X1-X2< 80 V Replace transformer (10)
No continuity in cold status Replace thermostat (2)
No continuity Replace fuse (7)
Resistivity nok Replace element (1)
4.3 Cold element resistivity by heater type (in Ohms)
Model Voltage
(kW) 208 V 240 V 400 V Y 480 V Y Ôƃƃp ÔÄƃp ÑŌÑp
12 11.41 Ω 13.55 Ω 12.48 Ω 16.88 Ω ---
15 8.07 Ω 11.41 Ω 11.41 Ω 13.55 Ω - - -
18 6.93 Ω 9.32 Ω 8.07 Ω 12.48 Ω - 18.73 Ω -
24 11.41 Ω 13.55 Ω 13.55 Ω 20.53 Ω 9.32 Ω 13.55 Ω 20.53 Ω
27 9.32 Ω 12.48 Ω 11.41 Ω 16.88 Ω 8.07 Ω 12.48 Ω -
36 6.93 Ω 9.32 Ω 9.32 Ω -6.93 Ω 9.32 Ω 13.55 Ω
48 11.41 Ω 13.55 Ω - - 9.32 Ω 13.55 Ω 20.53 Ω
54 9.32 Ω 12.48 Ω - - 8.07 Ω 12.48 Ω -
60 8.07 Ω 11.41 Ω --6.93 Ω 11.41 Ω -
72 6.93 Ω 9.32 Ω ---9.32 Ω 13.55 Ω
81 ----9.32 Ω 12.48 Ω -
90 ----8.07 Ω 11.41 Ω -
108----6.93 Ω 9.32 Ω 13.55 Ω
120 ----8.07 Ω 11.41 Ω -
144 ----6.93 Ω 9.32 Ω 13.55 Ω
Depending on element type, hot resistivity may be 5% more than
cold resistivity.
ENGLISH
OPERATION
TROUBLESHOOTING

6| CF SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
MOUNTING THE WATER HEATER
INSTALLATION
5. Mounting the water heater
!
CAUTION: Injury
Hot water outlet pipes leaving unit can be hot to the
touch. Insulation must be used for hot water pipes below
36˝ (0.9 m) due to burn risk to children.
!
NOTICE:
This unit should not be installed in a location
where it may be exposed to temperatures less than
36 °F (2°C). If the unit may be subject to freezing tempera-
tures all water must be drained from the unit.
Failure to comply with this instruction voids all warranties.
The unit should be located in an area where water
leakage from the unit or connections will not result in
damage to the area adjacent to the unit. If such a location
cannot be avoided it is recommended that a drain
pan be installed under the unit.
Application
Before mounting, double check that the correct voltage the unit
requires matches the voltage of the local power supply. The voltage
and configuration (Wye or Delta) are declared on the nameplate.
Make sure that the supply wire size corresponds to the heater ca-
pacity and wire run according to NEC. Installation carried out by a
licensed electrician will ensure this. The hot water supply includes
an air vent. The incoming water supply includes a pre-installed pres-
sure relief valve. For water supply line positions, see section 10.1,
“Dimension drawings”, pg. 9.
5.1 Mounting
fInstall the water heater as close as possible to the main hot
water draw off points.
fKeep a minimum of 5˝ (127 mm) clearance on all sides for
service.
fNEMA 3 enclosures require a minimum clearance of 20˝ (510
mm) on the front side to allow the hinged cover to be fully
opened.
fIf there is a drain tube connected to the pressure relief valve,
make sure that the drain water is not blocked by anything.
5.1.1 Enclosure dimensions, excluding plumbing fittings
NEMA 3 NEMA 4 / 4X
Capacity
No. of
Elements
Width
(X)
Height
(Y)
Depth
(Z)
Width
(X)
Height
(Y)
Depth
(Z)
12–18 kW 316
1/16˝15 1/8˝ 9 1/8˝24˝ 24˝ 9 ½˝
24–36 kW 618
5/8˝ 21 7/8˝9 ¼˝ 24˝ 24˝ 9 ½˝
48–72 kW 12 18
5/8˝30½˝ 9 ¼˝ 24˝ 48˝ 13 5/8˝
81–108 kW 18 24˝ 48˝ 13
5/8˝24˝ 48˝ 13 5/8˝
120–144 kW 24 24˝ 48˝ 13
5/8˝24˝ 48˝ 13 5/8˝
5.1.2 Mounting screw positions
Enclosure 3-element
12–18 kW
6-element
24–36 kW
12-element
48–72 kW
NEMA 3 - (A) X/Y 8
1/8˝ / 17 1/8˝ 9 5/16˝ / 23 7/8˝ 9 5/16˝ / 32 3/8˝
NEMA 4 - (B) X/Y 22
7/16˝ / 25 ¼˝ 22 7/16˝ / 25 ¼˝ 22 7/16˝ / 49 ¼˝
NEMA 4X - (B) X/Y 22
7/16˝ / 25 ¼˝ 22 7/16˝ / 25 ¼˝ 22 7/16˝ / 49 ¼˝
Enclosure 18-element
81–108 kW
24-element
120–144 kW
NEMA 3 - (B) X/Y 22
7/16˝ / 49 ¼˝ 22 7/16˝ / 49 ¼˝
NEMA 4 - (B) X/Y 22
7/16˝ / 49 ¼˝ 22 7/16˝ / 49 ¼˝
NEMA 4X - (B) X/Y 22
7/16˝ / 49 ¼˝ 22 7/16˝ / 49 ¼˝
6. Water connections
!
NOTICE:
Excessive heat from soldering on copper pipes near the CF
heater may cause damage.
!
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.
6.1 Venting the air
fBefore the heater is connected to the water supply, make sure
that the water supply is flushed first to ensure it is free from
any scale and dirt. The water pressure needs to be less than
145 psi (10 bar).
fIf the water pressure exceeds 145 psi (10 bar), install a pressure
reducing valve in the cold water pipework. Cold water supply
(inlet) is located on the bottom right.
fBefore the heater is connected to the electric supply, make sure
that the water supply line is flushed for 3 minutes minimum to
vent any air pockets out of the tubing system.
fOpen the service screw on the vent valve to release the air.
fOpen and close the ball valve on the cold water supply side
several times to release any air pockets from the heater.
fOnce the air is released, close the screw on the vent valve.
AB

WWW.STIEBEL-ELTRON-USA.COM CF SERIES| 7
ENGLISH
INSTALLATION
ELECTRICAL CONNECTION
6.2 Leakage check
Once all plumbing work is done, check for leaks. If necessary, take
corrective action.
7. Electrical connection
7.1 Safety
DANGER: Electrocution
Before proceeding with any installation, adjustment, al-
teration, or service of the water heater, all circuit break-
er switches servicing the appliance must be turned off.
Make sure that nobody can activate the breaker in the
distribution panel during your service work on the ap-
pliance.
DANGER: Electrocution
The appliance must be properly grounded. Failure to
electrically ground the product could result in serious
personal injury or death.
7.2 Electric supply
Check the electric supply infrastructure:
For delta configuration, a three-phase wire and a ground are sup-
plied. For a Wye configuration, a three-phase wire, a neutral, and
a ground are supplied. The configuration and voltage are declared
on the unit name plate on the enclosure front type plate.
B
A
fFeed the wire through the knockout (A) using a Romex clamp
for strain relief.
fConnect the live wires to the contactor (B).
fPull the ground wire into the ground terminal.
7.3 Terminal block torque
To tighten wire to the terminal block, use the proper torque value
according to NEC:
Wire gauge (AWG) Torque (lb-in)
880
6–4 165
3275
The appliance should be connected to a properly grounded dedicated
branch circuit of proper voltage rating. In installations with several
CF heaters, each heater requires a separate circuit with wire sizes
according to NEC.
8. Commissioning
fClose the front cover before the electric supply is turned on.
fBefore the heater is activated by switching the electric supply
on, run hot water via a hot water faucet for a minimum of 3
minutes to purge all air from the system.
PLQ
12
D0000053277
fTurn on the circuit breaker.
fTurn on the heater via the on/off switch.
fCheck the water temperature after several minutes of
operation.
fExplain the end user how the heater operates.
fMake the end user aware that hot water can cause injures if it
is more than 125 °F (52 °C).
fDraw special attention to the safety information.
fHand over the operating manual to the end user.
9. Maintenance
DANGER: Electrocution
Before proceeding with any installation, adjustment,
alteration, or service of the appliance, all circuit break-
er switches servicing the appliance must be turned off.
Make sure that nobody can activate the breaker in the
distribution panel during your service work on the ap-
pliance.
Stiebel Eltron water heaters are designed for a very long service life.
Actual life expectancy depends on water quality and use. To ensure
consistent water flow, remove scale build up on the faucet or any
connected fixtures.

8| CF SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10. Technical data
Item Number Voltage
3-phase
KW Full Load
Amp Draw
3P Breaker
Size (A)
No. of
Elements
Pipe
Size
(inches)
Standard
Enclosure Size
Excluding fittings
(W x H x D in inches)
CF 12 KW CF-012-208D 208 11.27 31.27 35 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CF-012-240D 240 12.50 30.07 35
CF-012-400Y 400 Wye 12.41 17.91 20
CF-012-480Y 480 Wye 13.50 16.24 20
CF 15 KW CF-015-208D 208 15.77 43.78 50 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CF-015-240D 240 15.00 36.08 40
CF-015-400Y 400 Wye 13.78 19.88 25
CF-015-480Y 480 Wye 16.65 20.03 25
CF-015-480D 480 18.00 21.65 25
CF 18 KW CF-018-208D 208 18.00 49.96 60 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CF-018-240D 240 18.00 43.30 50
CF-018-400Y 400 Wye 19.29 27.84 30
CF-018-480Y 480 Wye 18.00 21.65 25
CF-018-480D* 480 18.00 21.65 25 6
CF 24 KW CF-024-208D 208 22.53 62.55 70 6 ¾ 185⁄8x 217⁄8x 9¼
CF-024-240D 240 25.00 60.14 70
CF-024-400D 400 25.00 36.08 40
CF-024-400Y 400 Wye 24.82 35.82 40
CF-024-480D 480 25.00 30.07 35
CF-024-480Y 480 Wye 22.20 26.70 30
CF-024-575D 575 24.00 24.10 30
CF 27 KW CF-027-208D 208 27.04 75.06 80 6 ¾ 185⁄8x 217⁄8x 9¼
CF-027-240D 240 27.02 65.01 80
CF-027-400D 400 29.17 42.10 50
CF-027-400Y 400 Wye 27.55 39.77 45
CF-027-480D 480 27.02 32.51 40
CF-027-480Y 480 Wye 27.00 32.48 40
CF 36 KW CF-036-208D 208 36.00 99.93 110 6 ¾ 185⁄8x 217⁄8x 9¼
CF-036-240D 240 36.00 86.60 100
CF-036-400D 400 33.28 48.04 60
CF-036-400Y 400 Wye 33.06 47.72 60
CF-036-480D 480 36.00 43.30 50
CF-036-575D 575 36.00 36.15 40
CF 48 KW CF-048-208D 208 45.07 125.09 150 12 1 185⁄8x 30½x 9¼
CF-048-240D 240 50.00 120.28 150
CF-048-400D 400 48.61 70.16 80
CF-048-480D 480 50.00 60.14 70
CF-048-575D 575 47.99 48.19 60
CF 54 KW CF-054-208D 208 54.08 150.11 175 12 1 185⁄8x 30½x 9¼
CF-054-240D 240 54.05 130.02 150
CF-054-400D 400 58.33 84.20 100
CF-054-480D 480 54.05 65.01 80
CF 60 KW CF-060-208D 208 63.09 175.13 200 12 1 185⁄8x 30½x 9¼
CF-060-240D 240 60.00 144.34 175
CF-060-400D 400 66.57 96.08 110
CF-060-480D 480 60.00 72.17 80
CF 72 KW CF-072-208D 208 72.00 199.85 225 12 1 185⁄8x 30½x 9¼
CF-072-240D 240 72.00 173.21 200
CF-072-480D 480 72.00 86.60 100
CF-072-575D 575 72.00 72.29 80
CF 81 KW CF-081-400D 400 75.00 108.25 125 18 1 24 x 48 x 135⁄8
CF-081-480D 480 81.07 97.52 110
CF 90 KW CF-090-400D 400 87.50 126.30 150 18 1 24 x 48 x 135⁄8
CF-090-480D 480 90.00 108.25 125
CF 108 KW CF-108-400D 400 99.85 144.12 175 18 1 24 x 48 x 135⁄8
CF-108-480D 480 108.00 129.90 150
CF-108-575D 575 108.00 108.44 125
CF 120 KW CF-120-400D 400 116.67 168.39 200 24 1¼ 24 x 48 x 135⁄8
CF-120-480D 480 120.00 144.34 175
CF 144 KW CF-144-400D 400 133.14 192.17 225 24 1¼ 24 x 48 x 135⁄8
CF-144-480D 480 144.00 173.21 200
CF-144-575D 575 144.00 144.59 175
Fixed temperature thermostat
MUST BE
specified with order.
Available thermostats (°F)
for all CF models
90, 110, 125, 145, 155, 185
*CF-018 480 V Delta (6-element
heater) available at extra cost

WWW.STIEBEL-ELTRON-USA.COM CF SERIES| 9
ENGLISH
INSTALLATION
TECHNICAL DATA
10.1 Dimension drawings
10.1.1 CF 12–18, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of Elements A B C D E
12–18 kW 325
3/8˝ 9 1/8˝16 1/16˝15 1/8˝ 2˝
10.1.2 CF 12–36, NEMA 4/4X enclosure
C
G
B
D
A
E
F
Capacity No. of Elements A B C D E F G
12–18 kW 326
3/8˝9 ½˝ 24˝ 24˝ 4˝ 35 7/8˝31 ¼˝
24–36 kW 626
3/8˝9 ½˝ 24˝ 24˝ 4˝ 37 1/8˝32 ¼˝
Hot outlet
Hot outlet
Cold inlet
Cold inlet

10 | CF SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.1.3 CF 24–36, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of Elements A B C D E
24–36 kW 632
3/8˝9 ¼˝ 18 5/8˝ 21 7/8˝3˝
10.1.4 CF 48–72, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of Elements A B C D E
48–72 kW 12 39
7/8˝9 ¼˝ 18 5/8˝30½˝ 3˝
Hot outlet
Hot outlet
Cold inlet
Cold inlet