STIEBEL ELTRON CE Series Instruction Manual

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

2| CE CES CERO 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 Technical data - CE series_________________________________________ 8
10.2 Technical data - CES series _______________________________________ 9
10.3 Technical data - CERO series ____________________________________10
10.4 Dimension drawings ______________________________________________11
10.5 Wiring diagrams ___________________________________________________14
10.6 CE/CES/CERO Temperature rise _________________________________26
11. Spare parts and service advice______________________________27
12. Warranty _______________________________________________________29

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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)

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3. Functional characteristics
CE/CES/CERO models are three-phase instantaneous electric water
heaters, intended for commercial use, permanently wired in Delta
or Wye configuration. Each series has models with power output
ranging from 12–144 kW.
CE models feature adjustable temperature output with a range of
90–185 °F (32–85°C), user-adjustable in one degree increments (°F
or °C) via a push button switch (13).
CES models limit the output temperature according to OSHA require-
ments to a maximum of 90 °F (32 °C). They are factory set at a fixed
temperature of 85 °F (29 °C).
CERO models have the same temperature adjustment range as CE
models, but are designed for caustic liquids like salt water. To avoid
corrosion, titanium elements (1) are used instead of the standard
incoloy elements (1) found in CE and CES models.
CE/CES/CERO 12–18 kW models contain 3 heating elements, 24–36
kW models contain 6 heating elements, 48–72 kW models contain 12
heating elements, 81–108 kW models contain 18 heating elements,
and 120–144 kW models contain 24 heating elements. The elements
used in different configurations are for 208, 240, 277, and 288 V.
CE/CES/CERO models are available in a NEMA 3 (standard), a NEMA4
(optional), or a NEMA 4X (optional) enclosure.
1 Element
2 Individual element thermostat/safety cut-off
3 Pressure sensor switch
4 Flow sensor
5 Terminal block
6 Electronic board PCB
7 Fuse box
8 Pressure relief valve
9 Air vent
10 Transformer
11 On/off indicator lamp
12 On/off switch
13 Temperature set switch
14 Ball valve, hot water supply side
15 Ball valve, inlet water supply side
16 Wire support
The heater’s outgoing water temperature is controlled with an elec-
tronic board (6) receiving sensor information from the flow sensor
(4), and an NTC sensor placed to detect incoming and outgoing water
temperatures. The element turns on once the flow sensor detects
a flow rate at or above the minimum activation rate. The board
calculates the necessary heating capacity, depending on required
temperature rise and flow rate.
Safety is provided by an individual thermostat/safety cut-off (2) for
each element, designed to avoid excessive heat buildup. A pressure
sensor switch (3) is installed in the first chamber to eliminate any
OPERATION
FUNCTIONAL CHARACTERISTICS

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possibility of dry firing. Each element circuit is individually fused.
The fuses are located in the fuse box (7).
In order to avoid latent heat buildup, the unit has an electronically
controlled delay timer that delays the activation of the heating ele-
ment slightly. This feature allows air to be purged from the system
before the element arrangement is activated to heat, and eliminates
scalding risk. Beside the electronic delay, the board has no addi-
tional safety functions.
The display monitor shows the set point temperature, the actual
outgoing water temperature, the flow rate and the heating rate. It
is possible to change the units from °F / gpm to °C /l/min.
Safety is provided by a pressure relief valve (8) with a 150 psi setting.
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 (three 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 10.6, “CE/CES/CERO
Temperature rise”, pg. 26.
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 (12).
fOpen the heater enclosure.
fCheck for any loose connections, and properly operating
breakers.
fPurge the heater to cool down the heater and to reset the elec-
tronic thermostat function.
fTurn the main breaker back on. Turn on the heater on/off
switch (12). For 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 (12) defect Check voltage
Pressure switch (3) Check voltage
PCB sensor
PCB voltage supply
Check sensor NTC and flow
sensor, PCB voltage supply
Transformer Check voltage X8 primary
Check voltage yellow-white
(secondary)
Safety cut-off Check voltage
Fuse (7) Check voltage
Element (1) Check resistivity
Reduced (J)
hot water (K)
(L)
Ball valve closed (14, 15) Open ball valve
Filter clogged Clean filter
Air in the system Vent the system
Lukewarm (M)
water (N)
Fuse burned (7) Check continuity
Triac failure Check amperage
4.2 Solutions based on symptoms in fault table
Symptom Analysis Solution
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(M)
(N)
No power Activate power
No continuity Replace on/off switch (12)
No continuity Replace pressure switch (3)
No continuity NTC
No continuity flow sensor
Replace sensor
Replace flow sensor (4)
X8(X10) > 200 V, A1 PWR IN 1-
A1 PWR In 2 > 20 V
Replace transformer (10)
No continuity in cold status Replace safety cut-off
No continuity Replace fuse (7)
Resistivity nok Replace element (1)
No continuity Replace fuse (7), check re-
sistivity of the associated
element
No ampacity element supply Replace triac
4.3 Cold element resistivity by heater type (in Ohms)
(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| CE CES CERO 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 is equipped with a pre-installed
pressure relief valve. For water supply line positions, see section
10.4, “Dimension drawings”, pg. 11.
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
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

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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.
A
C
B
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 (C).
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 water heater should be connected to a properly grounded ded-
icated branch circuit of proper voltage rating. In installations with
several CE/CES/CERO water heaters, each unit 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.

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INSTALLATION
TECHNICAL DATA
10. Technical data
10.1 Technical data - CE series
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)
CE 12 KW CE-012-208D 208 11.27 31.27 35 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CE-012-240D 240 12.50 30.07 35
CE-012-400Y 400 Wye 12.41 17.91 20
CE-012-480Y 480 Wye 13.50 16.24 20
CE 15 KW CE-015-208D 208 15.77 43.78 50 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CE-015-240D 240 15.00 36.08 40
CE-015-400Y 400 Wye 13.78 19.88 25
CE-015-480Y 480 Wye 16.65 20.03 25
CE-015-480D 480 18.00 21.65 25
CE 18 KW CE-018-208D 208 18.00 49.96 60 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CE-018-240D 240 18.00 43.30 50
CE-018-400Y 400 Wye 19.29 27.84 30
CE-018-480Y 480 Wye 18.00 21.65 25
CE-018-480D* 480 18.00 21.65 25 6
CE 24 KW CE-024-208D 208 22.53 62.55 70 6 ¾ 185⁄8x 217⁄8x 9¼
CE-024-240D 240 25.00 60.14 70
CE-024-400D 400 25.00 36.08 40
CE-024-400Y 400 Wye 24.82 35.82 40
CE-024-480D 480 25.00 30.07 35
CE-024-480Y 480 Wye 22.20 26.70 30
CE-024-575D 575 24.00 24.10 30
CE 27 KW CE-027-208D 208 27.04 75.06 80 6 ¾ 185⁄8x 217⁄8x 9¼
CE-027-240D 240 27.02 65.01 80
CE-027-400D 400 29.17 42.10 50
CE-027-400Y 400 Wye 27.55 39.77 45
CE-027-480D 480 27.02 32.51 40
CE-027-480Y 480 Wye 27.00 32.48 40
CE 36 KW CE-036-208D 208 36.00 99.93 110 6 ¾ 185⁄8x 217⁄8x 9¼
CE-036-240D 240 36.00 86.60 100
CE-036-400D 400 33.28 48.04 60
CE-036-400Y 400 Wye 33.06 47.72 60
CE-036-480D 480 36.00 43.30 50
CE-036-575D 575 36.00 36.15 40
CE 48 KW CE-048-208D 208 45.07 125.09 150 12 1 185⁄8x 30½x 9¼
CE-048-240D 240 50.00 120.28 150
CE-048-400D 400 48.61 70.16 80
CE-048-480D 480 50.00 60.14 70
CE-048-575D 575 47.99 48.19 60
CE 54 KW CE-054-208D 208 54.08 150.11 175 12 1 185⁄8x 30½x 9¼
CE-054-240D 240 54.05 130.02 150
CE-054-400D 400 58.33 84.20 100
CE-054-480D 480 54.05 65.01 80
CE 60 KW CE-060-208D 208 63.09 175.13 200 12 1 185⁄8x 30½x 9¼
CE-060-240D 240 60.00 144.34 175
CE-060-400D 400 66.57 96.08 110
CE-060-480D 480 60.00 72.17 80
CE 72 KW CE-072-208D 208 72.00 199.85 225 12 1 185⁄8x 30½x 9¼
CE-072-240D 240 72.00 173.21 200
CE-072-480D 480 72.00 86.60 100
CE-072-575D 575 72.00 72.29 80
CE 81 KW CE-081-400D 400 75.00 108.25 125 18 1 24 x 48 x 135⁄8
CE-081-480D 480 81.07 97.52 110
CE 90 KW CE-090-400D 400 87.50 126.30 150 18 1 24 x 48 x 135⁄8
CE-090-480D 480 90.00 108.25 125
CE 108 KW CE-108-400D 400 99.85 144.12 175 18 1 24 x 48 x 135⁄8
CE-108-480D 480 108.00 129.90 150
CE-108-575D 575 108.00 108.44 125
CE 120 KW CE-120-400D 400 116.67 168.39 200 24 1¼ 24 x 48 x 135⁄8
CE-120-480D 480 120.00 144.34 175
CE 144 KW CE-144-400D 400 133.14 192.17 225 24 1¼ 24 x 48 x 135⁄8
CE-144-480D 480 144.00 173.21 200
CE-144-575D 575 144.00 144.59 175
*CE-018 480 V Delta (6-element
heater) available at extra cost

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.2 Technical data - CES series
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)
CES 12 KW CES-012-208D 208 11.27 31.27 35 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CES-012-240D 240 12.50 30.07 35
CES-012-400Y 400 Wye 12.41 17.91 20
CES-012-480Y 480 Wye 13.50 16.24 20
CES 15 KW CES-015-208D 208 15.77 43.78 50 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CES-015-240D 240 15.00 36.08 40
CES-015-400Y 400 Wye 13.78 19.88 25
CES-015-480Y 480 Wye 16.65 20.03 25
CES-015-480D 480 18.00 21.65 25
CES 18 KW CES-018-208D 208 18.00 49.96 60 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CES-018-240D 240 18.00 43.30 50
CES-018-400Y 400 Wye 19.29 27.84 30
CES-018-480Y 480 Wye 18.00 21.65 25
CES-018-480D* 480 18.00 21.65 25 6
CES 24 KW CES-024-208D 208 22.53 62.55 70 6 ¾ 185⁄8x 217⁄8x 9¼
CES-024-240D 240 25.00 60.14 70
CES-024-400D 400 25.00 36.08 40
CES-024-400Y 400 Wye 24.82 35.82 40
CES-024-480D 480 25.00 30.07 35
CES-024-480Y 480 Wye 22.20 26.70 30
CES-024-575D 575 24.00 24.10 30
CES 27 KW CES-027-208D 208 27.04 75.06 80 6 ¾ 185⁄8x 217⁄8x 9¼
CES-027-240D 240 27.02 65.01 80
CES-027-400D 400 29.17 42.10 50
CES-027-400Y 400 Wye 27.55 39.77 45
CES-027-480D 480 27.02 32.51 40
CES-027-480Y 480 Wye 27.00 32.48 40
CES 36 KW CES-036-208D 208 36.00 99.93 110 6 ¾ 185⁄8x 217⁄8x 9¼
CES-036-240D 240 36.00 86.60 100
CES-036-400D 400 33.28 48.04 60
CES-036-400Y 400 Wye 33.06 47.72 60
CES-036-480D 480 36.00 43.30 50
CES-036-575D 575 36.00 36.15 40
CES 48 KW CES-048-208D 208 45.07 125.09 150 12 1 185⁄8x 30½x 9¼
CES-048-240D 240 50.00 120.28 150
CES-048-400D 400 48.61 70.16 80
CES-048-480D 480 50.00 60.14 70
CES-048-575D 575 47.99 48.19 60
CES 54 KW CES-054-208D 208 54.08 150.11 175 12 1 185⁄8x 30½x 9¼
CES-054-240D 240 54.05 130.02 150
CES-054-400D 400 58.33 84.20 100
CES-054-480D 480 54.05 65.01 80
CES 60 KW CES-060-208D 208 63.09 175.13 200 12 1 185⁄8x 30½x 9¼
CES-060-240D 240 60.00 144.34 175
CES-060-400D 400 66.57 96.08 110
CES-060-480D 480 60.00 72.17 80
CES 72 KW CES-072-208D 208 72.00 199.85 225 12 1 185⁄8x 30½x 9¼
CES-072-240D 240 72.00 173.21 200
CES-072-480D 480 72.00 86.60 100
CES-072-575D 575 72.00 72.29 80
CES 81 KW CES-081-400D 400 75.00 108.25 125 18 1 24 x 48 x 135⁄8
CES-081-480D 480 81.07 97.52 110
CES 90 KW CES-090-400D 400 87.50 126.30 150 18 1 24 x 48 x 135⁄8
CES-090-480D 480 90.00 108.25 125
CES 108 KW CES-108-400D 400 99.85 144.12 175 18 1 24 x 48 x 135⁄8
CES-108-480D 480 108.00 129.90 150
CES-108-575D 575 108.00 108.44 125
CES 120 KW CES-120-400D 400 116.67 168.39 200 24 1¼ 24 x 48 x 135⁄8
CES-120-480D 480 120.00 144.34 175
CES 144 KW CES-144-400D 400 133.14 192.17 225 24 1¼ 24 x 48 x 135⁄8
CES-144-480D 480 144.00 173.21 200
CES-144-575D 575 144.00 144.59 175
*CES-018 480 V Delta (6-element
heater) available at extra cost

10 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.3 Technical data - CERO series
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)
CERO 12 KW CERO-012-208D 208 10.15 28.17 35 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CERO-012-240D 240 12.50 30.07 35
CERO-012-400Y 400 Wye 11.48 16.57 20
CERO-012-480Y 480 Wye 11.10 13.35 15
CERO 15 KW CERO-015-208D 208 13.52 37.53 45 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CERO-015-240D 240 13.51 32.51 40
CERO-015-400Y 400 Wye 12.41 17.91 20
CERO-015-480Y 480 Wye 16.65 20.03 25
CERO 18 KW CERO-018-208D 208 18.00 49.96 60 3 ¾ 161⁄16 x 151⁄8x 91⁄8
CERO-018-240D 240 18.00 43.30 50
CERO-018-400Y 400 Wye 16.53 23.86 30
CERO-018-480Y 480 Wye 18.00 21.65 25
CERO-018-480D* 480 16.66 20.04 25 6
CERO 24 KW CERO-024-208D 208 20.30 56.34 70 6 ¾ 185⁄8x 217⁄8x 9¼
CERO-024-240D 240 25.00 60.14 70
CERO-024-400D 400 25.00 36.08 40
CERO-024-400Y 400 Wye 24.82 35.82 40
CERO-024-480D 480 25.00 30.07 35
CERO-024-480Y 480 Wye 22.20 26.70 30
CERO-024-575D 575 24.00 24.09 30
CERO 27 KW CERO-027-208D 208 27.04 75.06 80 6 ¾ 185⁄8x 217⁄8x 9¼
CERO-027-240D 240 27.02 65.01 80
CERO-027-480D 480 27.02 32.50 40
CERO 36 KW CERO-036-240D 240 36.00 86.60 100 6 ¾ 185⁄8x 217⁄8x 9¼
CERO-036-400D 400 33.28 48.04 60
CERO-036-400Y 400 Wye 33.06 47.72 60
CERO-036-480D 480 36.00 43.30 50
CERO-036-575D 575 36.00 36.15 40
CERO 48 KW CERO-048-240D 240 50.00 120.28 150 12 1 185⁄8x 30½x 9¼
CERO-048-400D 400 50.00 72.17 80
CERO-048-480D 480 50.00 60.14 70
CERO-048-575D 575 47.99 48.19 60
CERO 54 KW CERO-054-208D 208 54.08 150.11 175 12 1 185⁄8x 30½x 9¼
CERO-054-240D 240 54.05 130.02 150
CERO-054-480D 480 54.05 65.01 70
CERO 72 KW CERO-072-240D 240 72.00 173.21 200 12 1 185⁄8x 30½x 9¼
CERO-072-480D 480 72.00 86.60 100
CERO-072-575D 575 71.99 72.28 80
CERO 81 KW CERO-081-400D 400 75.00 108.25 125 18 1 24 x 48 x 135⁄8
CERO-081-480D 480 81.07 97.52 110
CERO 90 KW CERO-090-480D 480 99.91 120.17 150 18 1 24 x 48 x 135⁄8
CERO 108 KW CERO-108-400D 400 99.85 144.12 175 18 1 24 x 48 x 135⁄8
CERO-108-480D 480 108.00 129.90 150
CERO-108-575D 575 108.00 108.44 125
CERO 144 KW CERO-144-400D 400 133.14 192.17 225 24 1¼ 24 x 48 x 135⁄8
CERO-144-480D 480 144.00 173.21 200
CERO-144-575D 575 144.00 144.59 175
*CERO-018 480 V Delta (6-element
heater) available at extra cost

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.4 Dimension drawings
10.4.1 CE/CES/CERO 12–18, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of
Elements
AB C D E
12–18 kW 325
3/8˝ 9 1/8˝16 1/16˝15 1/8˝ 2˝
10.4.2 CE/CES/CERO 12–36, NEMA 4/4X enclosure
C
G
B
D
A
E
F
Capacity No. of
Elements
AB 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
Cold inlet
Hot outlet
Cold inlet

12 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.4.3 CE/CES/CERO 24–36, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of
Elements
AB C D E
24–36 kW 632
3/8˝9 ¼˝ 18 5/8˝ 21 7/8˝3˝
10.4.4 CE/CES/CERO 48–72, NEMA 3 enclosure
C
B
D
A
E
Capacity No. of
Elements
AB 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

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.4.5 CE/CES/CERO 81–144, NEMA 3 enclosure / CE/CES/CERO 48–144, NEMA 4/4X enclosure
C
G
B
D
A
E
F
Capacity No. of
Elements
AB C D E F G
48–72 kW 12 50
3/8˝13 5/8˝24˝ 48˝ 4˝ 37 5/8˝32 1/8˝
81–108 kW 18 50
3/8˝13 5/8˝24˝ 48˝ 4˝ 37 ¾˝ 32 ¼˝
120–144 kW 24 50
3/8˝13 5/8˝24˝ 48˝ 4˝ 40 5/8˝34½˝
Hot outlet
Cold inlet

14 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.5 Wiring diagrams
10.5.1 CE/CES/CERO 12–18, 208 V & 240 V Delta wiring diagram
This diagram is valid for: CE/CES/CERO 12 208/240 V, CE/CES/CERO 15 208/240 V, CE/CES/CERO 18 208/240 V
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F3 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R3 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T3 Thermostat
TR1-TR3 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Thermostat block
X6 Element block
X7 Triac block
X8 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
HX Flow Layout
Delta Conguration
L1
E3
E1
E2
L2
L3
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.5.2 CE/CES/CERO 12–18 400 & 480 V Wye wiring diagram
This diagram is valid for: CE/CES/CERO 12 400/480 V Wye, CE/CES/CERO 15 400/480 V Wye, & CE/CES/CERO 18 400/480 V Wye
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F3 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R3 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T3 Thermostat
TR1-TR3 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Triac block
X6 Thermostat block
X7 Element block
X8 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
Wye Conguration
L1E1
N
E2
E3
L2
L3
HX Flow Layout
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ

16 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.5.3 CE/CES/CERO 24–36, 208 V & 240 V Delta wiring diagram
This diagram is valid for: CE/CES/CERO 24 208/240 V, CE/CES/CERO 27 208/240 V, & CE/CES/CERO 36 208/240 V
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F6 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R6 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T6 Thermostat
TR1-TR6 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Thermostat block
X6 Element block
X7 Triac block
X8 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
HX Flow Layout
Delta Conguration
L1
E3
E1
E2
L2
L3
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.5.4 CE/CES/CERO 24–36, 400 V & 480 V Delta wiring diagram
This diagram is valid for: CE/CES/CERO 24 400/480 V, CE/CES 27 400/480 V, CERO 27 480 V, & CE/CES/CERO 36 400/480 V
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F3 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R6 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T6 Thermostat
TR1-TR3 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Thermostat block 1
X6 Element block 1
X7 Element block 2
X8 Thermostat block 2
X9 Triac block
X10 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
Delta Conguration
L1
E3
E1
E2
L2
L3
HX Flow Layout
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ

18 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.5.5 CE/CES/CERO 24, CE/CES/CERO 36 575 V Delta wiring diagram
This diagram is valid for: CE/CES/CERO 24 575 V, & CE/CES/CERO 36 575 V
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F3 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R6 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T6 Thermostat
TR1-TR3 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Thermostat block 1
X6 Element block 1
X7 Element block 2
X8 Thermostat block 2
X9 Triac block
X10 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
HX Flow Layout
Delta Conguration
L1
E3
E1
E2
L2
L3
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ

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ENGLISH
INSTALLATION
TECHNICAL DATA
10.5.6 CE/CES/CERO 48–72, 208 V & 240 V Delta wiring diagram
This diagram is valid for: CE/CES 48 208/240 V, CERO 48 240 V, CE/CES 54 208/240 V, CERO 54 240 V, CE/CES 60 208/240 V,
CE/CES 72 208/240 V, & CERO 72 240 V
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ
Delta Conguration
L1
E3
E1
E2
L2
L3
HX Flow Layout
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F12 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R12 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T12 Thermostat
TR1-TR12 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X2 ^ĞĐŽŶĚĂƌLJƚĞƌŵŝŶĂůďůŽĐŬϭ
X3 ^ĞĐŽŶĚĂƌLJƚĞƌŵŝŶĂůďůŽĐŬϮ
X4 Fuse block
X5 Thermostat block
X6 Element block
X7 Triac block
X8 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ

20 | CE CES CERO SERIES WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
TECHNICAL DATA
10.5.7 CE/CES/CERO 48–72, 400 V & 480 V Delta wiring diagram
This diagram is valid for: CE/CES/CERO 48 400/480 V, CE/CES 54 400/480 V, CERO 54 480 V, CE/CES 60 400/480V, CE/CES 72 480 V, & CERO 72 400/480 V
ƉƉƌŽǀĞĚtĞƐWĂůŵĞƌϬϭϭϳϮϬ
A1 ŽŶƚƌŽůďŽĂƌĚ
ϭ Thermistor
D1 ĞůĂLJƟŵĞƌ
F1-F6 Fuse
FS1 Flow sensor
G1 DĂŝŶƉŽǁĞƌůŝŐŚƚ
G2 KŶŽīƉŽǁĞƌůŝŐŚƚ
P1 Low pressure switch
R1-R12 Resistance element
S1 KŶŽīƐǁŝƚĐŚ
S2 dĞŵƉĞƌĂƚƵƌĞƚŽŐŐůĞƐǁŝƚĐŚ
T1-T12 Thermostat
TR1-TR6 Triac
TX1 dƌĂŶƐĨŽƌŵĞƌ
X0 Main terminal block
X1 'ƌŽƵŶĚƚĞƌŵŝŶĂů
X4 Fuse block
X5 Thermostat block 1
X6 Element block 1
X7 Element block 2
X8 Thermostat block 2
X9 Triac block
X10 dƌĂŶƐĨŽƌŵĞƌƚĞƌŵŝŶĂůďůŽĐŬϭ
Delta Conguration
L1
E3
E1
E2
L2
L3
HX Flow Layout