Bosch WH36 Technical Document

[en] Installation Manual and Operating Instructions 2
[es] Instrucciones de instalación y funcionamiento 21
[fr] Instructions d'installation et d'utilisation 41
Tankless Electric Water Heaters
TRONIC 5000C Pro
6720647022-00.1V
WH36
6 720 647 022 (2013/04) US
IMPORTANT: This booklet should be given to the customer after installation and demonstration.
For Service & Installation contact:
BOSCH Thermotechnology Corp.
50 Wentworth Avenue, Londonderry
NH 03053
Phone: [phone]
www.bosch-climate.us

6 720 647 022 (2013/04) Tronic 5000C
2 | Table of contents
Table of contents
1 Key to symbols and safety instructions . . . . . . . . . . 2
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . 3
2 Information about the heater . . . . . . . . . . . . . . . . . . . 3
2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Technical identification code . . . . . . . . . . . . 3
2.3 Model name and number identification . . . . 3
2.4 Package contents . . . . . . . . . . . . . . . . . . . . . 3
2.5 Components Diagram . . . . . . . . . . . . . . . . . . 4
2.6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . 6
2.8 Description of the heater . . . . . . . . . . . . . . . 6
2.9 Technical specifications . . . . . . . . . . . . . . . . 7
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Important information . . . . . . . . . . . . . . . . . . 8
4.2 Selection of place of installation . . . . . . . . . . 8
4.3 Mounting the water heater . . . . . . . . . . . . . . 9
4.4 Water connections . . . . . . . . . . . . . . . . . . . 10
4.5 Electrical connections . . . . . . . . . . . . . . . . . 10
4.6 Starting up . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Operation instructions . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Before using the water heater . . . . . . . . . . 14
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1 Key to symbols and safety
instructions
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this
document:
•NOTICEindicatesasituationthatcould result in damage to
property or equipment.
•CAUTION indicates a situation that could result in minor to
medium injury.
•WARNING indicates a situation that could result in severe
injury or death.
•DANGER indicates a situation that will result in severe
injury or death.
Important information
Additional symbols
Warnings in this document are identified by
a warning triangle printed against a grey
background.
Keywords at the start of a warning indicate
the type and seriousness of the ensuing risk
ifmeasurestopreventtherisk are nottaken.
Thissymbolindicatesimportant information
where there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the
document
• List entry
– List entry (second level)
Table 1

6 720 647 022 (2013/04)Tronic 5000C
Information about the heater | 3
1.2 Safety precautions
When using this electrical equipment, basic safety precautions
should always be followed, including the following:
▶ READ AND FOLLOW ALL INSTRUCTIONS.
▶ This appliance must be grounded.
▶ Disconnect this product from the electrical supply before
cleaning, servicing or removing the cover.
▶ To reduce the risk of injury, close supervision is necessary
when the product is used near children or elderly persons.
▶ Warning: Mount the unit onto a flat section of wall, well
away from any potential splashes of water or spray and
away from areas where direct moist or wet contact could
occur.
▶ Warning: Indoor installation only, where it will NOT be
exposed to freezing.
▶ Warning: Do not install a check valve or any other type of
back flow preventer within ten feet of the cold water inlet.
▶ Theelectricalinstallation must conform to current National
Electrical Codes.
▶ Warning: Do not switch the heater on if you suspect that it
maybe frozen.Wait untilyou aresurethat ithas completely
thawed out.
▶ The Tronic 5000C Pro is designed to heat potable cold
waterfordomesticpurposes.Theheaterisnotdesignedto
accept inlet water temperatures above 86° F. Contact
Bosch Thermotechnology Corp. before specifying or
installing the appliance in any other application.
▶ Warning: Any water heater should be installed in such a
manner that if it should leak, the resulting flow of water will
not cause damage to the area in which it is installed.
National Plumbing codes require a drain pan for any water
heater installation. Failure to install one is the sole
responsibility of owner and/or installer. Reference UPC
2000 (Uniform Plumbing Code) Section 510 - Protection
from Damage or IPC 200 (International Plumbing Code)
Section 504- Safety Devices.
▶ Additional Canadian safety instructions:
– AspertheCanadianElectricalCode,C22.1-02Section
26-744, an auxiliary terminal block must be fitted to
the unit before connecting to the electrical supply (Kit
Part N° “AE Canada Kit”) (See page 10).
– A green terminal (or a wire connector marked “G,”
“GR,” “GROUND” or “GROUNDING”) is provided within
the control. To reduce the risk of electrical shock,
connect this terminal or connector to the grounding
terminal of the electrical service of supply panel with a
continuous copper wire in accordance with the
Canadian Electrical Code, Part I.
– This product shall be protected by a Class A ground
fault circuit interrupter.
▶ Keep this manual in a safe place once the unit has been
installed as it may be needed for future reference.
2 Information about the heater
2.1 Disclaimer
2.1.1 Approval number
Commonwealth of Massachusetts
In the Commonwealth of Massachusetts a licensed plumber or
electrician must perform the installation. (Approval number:
P1-09-25).
2.2 Technical identification code
[EI] Electronic Instantaneous
[36] Maximum output (kW)
[E] Electronic temperature control
[W] Wall hung
[I] Indoor
[H] Horizontal installation
[B] Water connections
2.3 Model name and number identification
2.4 Package contents
• Tankless electric water heater
• 4 screws and gaskets
EI 36 EWIHB
Table 2
Model Name Model Number
WH36 EI 36 E/M W I H B
Table 3

6 720 647 022 (2013/04) Tronic 5000C
4 | Information about the heater
2.5 Components Diagram
Fig. 1
[A] Heating module
[B] Heating element assembly
[C] Heating module PCB
[D] Hot water outlet
[E] Cold water inlet
[F] Temperature adjustment knob
[G] Flow transducer
[H] Terminal block (CANADA ONLY)
[I] 6 way terminal block
[J] Temperature sensor
[K] Control PCB
[L] Double pole thermal cut-out
[M] Inlet water filter
[N] Flow regulator
6720647022-01.1V
A
D
F K
G
E
L
J
C
B
H
I
NM

6 720 647 022 (2013/04)Tronic 5000C
Information about the heater | 5
2.6 Dimensions
Fig. 2
[1] Outlet ¾ " NPT (hot water)
[2] Temperature knob
[3] LED
[4] Inlet ¾ " NPT (cold water)
Dimensions
(inches) WH36
A (Width) 20 "
B (Height) 12½ "
C (Depth) 4½ "
D 17 5/8"
E 17 5/8"
F2
5/8"
G 3 3/8"
H 11 1/8"
I5
5/8"
J1
7/8"
Water connections ¾ "
Table 4 Dimensions

6 720 647 022 (2013/04) Tronic 5000C
6 | Information about the heater
2.7 Wiring diagram
Fig. 3 Internal wiring schematic for single phase WH36 unit.
2.8 Description of the heater
How the Tronic 5000C Pro works;
• The Tronic 5000C Pro heats water continuously as it flows
through the heater modules.
• The electronic control PCB monitors the flow rate and the
incoming water temperature and then switches on the
required number of heater elements to reach the
temperature set by the temperature adjustment dial.
• As the flow rate or the incoming water temperature
changes, the electronic control adjusts the number of
heater elements used so that the outlet temperature is
maintained.
• The outlet water temperature can change slightly as the
flow rate changes due to the steps in power as different
heater elements are switched on and off.
• The outlet water temperature can also vary if the maximum
flow rate is exceeded (see Fig. 8) or if the supply voltage
changes.
• Each heater module is protected by an electro-mechanical
thermal cut-out. If the temperature of any of the heater
modules gets too high, then the cut-out will trip and cut the
power to that heater module. If the cut-out trips, it must be
reset while the circuit breakers are off. If you are not
comfortable or qualified to perform this task, consult the
original installer or a licensed electrician. This cut-out will
only trip in exceptional circumstances.
• Dependingon theregionof thecountry,the temperatureof
thewatersupplycan varybetween 40°Fin winterto 80°Fin
summer, with an average of 55°F. The output temperature
at maximum flow of the heater is dependent on inlet water
temperature.
DANGER: Risk of electric shock!
▶ Always switch off the electricity supply to the unit before any
intervention in the heater.

6 720 647 022 (2013/04)Tronic 5000C
Regulations | 7
2.9 Technical specifications
3 Regulations
Any local by-laws and regulations pertaining to installation and
use of electric water heating appliances must be observed.
Please refer to the laws that should be attended in your
country.
• Theelectricalinstallation must conform to current National
Electrical Codes.
• Asper the CanadianElectricalCode, C22.1-02 Section26-
744, an auxiliary terminal block must be fitted to the unit
before connecting to the electrical supply.
• A green terminal (or wire connection marked “G”, “GR”,
“GROUND” or “GROUNDING”) is provided within the
control box. Aditional Canadian safety instructions, to
reduce the risk of electrical shock, connect this terminal or
connector to the grounding terminal of the electrical
service of supply panel with a continuous copper wire in
accordance with the Canadian Electrical Code, Part I.
• In Canada, this product shall be protected by a Class A
ground fault circuit interrupter.
• In the Commonwealth of Massachusetts a licensed
plumber or electrician must perform the installation.
(Approval number: P1-09-25).
• In the Commonwealth of Massachusetts a pressure relief
valve shall be installed on the cold water side by a licensed
plumber. (MGL 142 Section 19, Approval number P1-09-
25).
• The unit must be wired by a qualified electrician, in
accordance with the current version of the National
Electrical Code US) or Canadian Electric Code (Canada).
• When the heater is not within sight of the electrical circuit
breakers, a circuit breaker lockout or additional local
means of disconnection for all non-grounded conductors
must be provided that is within sight of the appliance. (Ref
NEC 422.31.).
• The power cable size and the installation must be in
accordance with the Canadian Electrical Code, C22.1-02.
Technical characteristics Units WH36
Voltage supply V 3 X 240 (Canada 240VAC)
Amperage A 3 x 60A (Canada 180A)
Maximum output kW 36.0kW
Temperature control range 95 °F to 131 °F
Minimum water pressure psi 15psi
Maximum water pressure psi 150psi
Minimum flow rate gal/min 0.8 US gal / min
Maximum flow rate (refer to Fig. 8)
Weight (without water) lbs 26.5 lbs
The unit will work at lower supply voltages but the following changes will apply:
Maximum output 30.2kW at 220V
27.0kW at 208V
Temperature control range 87 °F to 116 °F at 220V
82 °F to 108 °F at 208V
Maximum power
(refer to Fig. 8)
84% of maximum at 220V
75% of maximum at 208V
Table 5
WARNING:
California Proposition 65 lists chemical
substances known to the state to cause
cancer, birth defects, death, serious illness
or other reproductive harm. This product
may contain such substances, be their
origin from fuel combustion (gas, oil) or
components of the product itself.

6 720 647 022 (2013/04) Tronic 5000C
8 | Installation
4 Installation
4.1 Important information
Please follow these instructions. Failure to follow instructions
may result in:
• Damage or injury.
• Improper installation/operation.
• Loss of warranty.
4.2 Selection of place of installation
• If being used in a public place, locate the heater out of easy
reach to discourage vandalism.
• Mount the unit onto a flat section of wall, well away from
any potential splashes of water or spray and away from
areas where direct moist or wet contact could occur.
• Install the heater in a place that provides easy access for
any service or maintenance.
4.2.1 Freeze prevention
Introduction
Please note that the water heater must not be installed in a
location where it may be exposed to freezing temperatures. If
the heater must be left in a space that is likely to experience
freezing temperatures, all water must be drained from the
heater. See Section 6.
Freeze damage is not covered under the warranty.
DANGER: Risk of electric shock!
▶ For safety reasons, disconnect the
power supply to the heater before any
service or testing is performed.
WARNING:
▶ This heater must be electrically
grounded in accordance with the most
recent edition of the National Electrical
Code. NFPA 70. In Canada, all electrical
wiring to the heater must be in
accordance with local codes and the
Canadian Electrical Code, CSA C22.1
Part 1.
DANGER:
▶ The installation must only be performed
byaqualifiedpersoninaccordancewith
these instructions.
▶ Bosch Thermotechnology Corp. is not
responsible for improperly installed
appliances.
WARNING:
▶ The heater must only be mounted in a
vertical position with the water fittings
located at the bottom of the heater.
Under no circumstances should the
heater be mounted differently.
WARNING:
▶ The appliance should be located in an
area where leakage of the heater or
connections will not result in damage to
the area adjacent to the appliance or to
lower floors of the structure.
WARNING: Risk of freezing!
▶ Donot installthewater heaterin an area
where there is a chance of freezing.
Damage to the water heater as a result
of freezing will not be covered under
warranty.
WARNING:
▶ ELECTRICITY IS EXTREMELY
DANGEROUS. TAKE EXTRA
PRECAUTIONS AND ENSURE ALL
CIRCUIT BREAKERS ARE OFF BEFORE
PERFORMING ANY WORK TO THE
HEATER.
WARNING:
▶ Indoor installation only, where it will
NOT be exposed to freezing.
Use of chemical agents such as anti-freeze
arenotallowedastheymaycausedamageto
the water heater’s internal components.

6 720 647 022 (2013/04)Tronic 5000C
Installation | 9
4.2.2 Recomended minimum clearances for servicing
Should it be necessary to service the Tronic 5000C Pro,
observe the following clearances. These are not required
clearances, but would facilitate any service work.
Fig. 4 Recommended minimum clearances
4.3 Mounting the water heater
▶ Undo the retaining screws on the front cover and take the
cover off the heater. Hold the back plate in position against
the wall and mark the four mounting holes.
▶ Drill the holes and secure the heater using the four wood
screws supplied.
Fig. 5 Vertical mounting position
WH36
Top (A) 12”
Sides 0”
Bottom (B) 6”
Front (C) 12”
Table 6 Recommended minimum clearances
WARNING:
▶ The heater must only be installed in the
orientationshowninFig. 5i.e.,mounted
in a vertical position with the water
fittings located at the bottom of the
heater. Under no circumstances
should the heater be mounted
differently.

6 720 647 022 (2013/04) Tronic 5000C
10 | Installation
4.4 Water connections
▶ The heater must be connected directly to the main cold
water supply and not to pre-heated water. (The inlet
water temperature must not be greater than 86 °F).
▶ Theheatermustbeinstalled withshutoff valvesonboththe
inlet and outlet connections.
▶ It is recommended that you use ¾ inch or ½ inch copper or
high-pressure flex connections.
▶ Do not use plastic piping within 3 feet on either side of
heater.
▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe
dope.
▶ Remember to keep the hot water pipe runs as short as
possible.
After the heater has been plumbed, and before you wire it,
flush it with water to remove any debris or loose particles.
Heater must be full of water and air purged before power is
turned on. Failure to do so may result in damage to the
product that is not covered by warranty.
▶ After flushing and filling the heater with water, (with power
off) disconnect the inlet connection and inspect the filter
screen for any debris that may have been flushed through
the system.
▶ Check the pressure of the main water supply. To operate
correctly, the heater needs the running pressures
mentioned in 5.
4.4.1 Water quality
Water quality can have an impact on appliance longevity and
may not be covered under the manufacturer's warranty.
▶ Forwater analysis data callyourlocal water department, or
if on a well, have well water analyzed periodically.
Ifwaterqualityexceedsone or more of the values specified
below, Bosch recommends consulting a local water
treatment professional for water softening/conditioning
options.
4.5 Electrical connections
WARNING:
▶ Do not install a non-return check valve
within 10 feet of the inlet.
WARNING:
▶ Do not apply heat or solder to
connections or pipe if they are already
connected to the unit.
NOTICE: Disclaimer
▶ Inthe Commonwealth ofMassachusetts
a pressure relief valve shall be installed
on the cold water side by a licensed
plumber. (MGL 142 Section 19,
Approval number P1-09-25).
The inlet and outlet connections are clearly
marked on the heater. They each have a
¾ inch NPT connector.
Description Max. Levels
pH pH 6.5 - 8.5
TDS (total Dissolved Solids) mg/l or ppm 500
Total hardness mg/l or ppm 100
(6 grains)
Aluminum mg/l or ppm 2.0
Chlorides mg/l or ppm 250
Copper mg/l or ppm 1.0
Iron mg/l or ppm 0.3
Manganese mg/l or ppm 0.05
Zinc mg/l or ppm 5.0
Table 7
WARNING:
▶ The unit must be wired by a qualified
electrician, in accordance with the
currentversion of theNationalElectrical
Code US) or Canadian Electric Code
(Canada).
When the heater is not within sight of the
electrical circuit breakers, a circuit breaker
lockout or additional local means of
disconnection for all non-grounded
conductors must be provided that is within
sight of the appliance. (Ref NEC 422.31.).