Buderus S32/5 User manual

Read carefully prior to installation and maintenance.
À lire attentivement avant le montage et la maintenance.
Installation and maintenance instructions
Notice d’installation et d’entretien
6 720 801 773-00.2ITL
S 32/5
[en] Installation and maintenance instructions for the contractor . . . . . . . . . . . . 2
[fr] Notice d'installation et d'entretien pour le professionnel . . . . . . . . . . . . . . . 18
6 720 804 007 (2013/02) US/CA
DANGER:
These installation instructions are intended solely
for use by a licensed heating contractor or service
technician. Read all instructions before installing.
Perform steps exactly in the order given. Failureto
followtheseinstructionscanresultinsevereinjury,
death or property damage.
DANGER:
Cette notice d’installation doit être utilisée unique-
ment par des installateurs chauffagistes ou des
techniciens de maintenance qualifiés. Lisez atten-
tivement toutes les consignes avant l’installation.
Exécutez les actions précisément dans l’ordre indi-
qué. En cas de non-respect, vous risquez de subir
de sérieuses blessures pouvant conduire à la mort
ou d’entraîner de lourds dommages matériels.

Table of Contents
S 32/5 – 6 720 804 007 (2013/02)2
Table of Contents
1 Safety Considerations and Symbol Descriptions . . . . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Instructions for the owner and operator . . . . . . . . . . . . . 4
2 Product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Included items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Poduct description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Rating plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Pressure drop curve of heating coil . . . . . . . . . . . . . . . . . 6
2.6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.7 Physical and connection dimensions . . . . . . . . . . . . . . . 8
3 Standards, regulations and directives . . . . . . . . . . . . . . . . . . . 9
4 Moving the tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Boiler installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1.1 Requirements for installation location . . . . . . . . . . . . . . 9
5.1.2 Positioning the tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2.1 Connecting the tank on the water side . . . . . . . . . . . . . 11
5.2.2 Installing a T&P safety valve (on-site) . . . . . . . . . . . . . . 11
5.3 Install a tank water temperature sensor (accessory)
or aquastat (accessory) . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1 Commissioning the tank . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Shutting down the tank . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Shutting down the heating system when there is
a risk of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Environmental Protection / Disposal . . . . . . . . . . . . . . . . . . . 14
9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1 Testing relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1.1 Drain the tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1.2 Descaling/cleaning the tank . . . . . . . . . . . . . . . . . . . . . . 14
9.1.3 Checking the magnesium anode . . . . . . . . . . . . . . . . . . 15
9.2 Re-commissioning after performing maintenance . . . . 15
10 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1
Safety Considerations and Symbol Descriptions
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1 Safety Considerations and Symbol
Descriptions
1.1 Explanation of symbols
Warnings
The following keywords are defined and can be used in this document:
•NOTICE indicates that damage to property may occur.
•CAUTION indicates that personal injury may occur.
•WARNING indicates that severe personal injury may occur.
•DANGER indicates that severe personal injury or death may occur.
Important Information
Additional symbols
1.2 Safety considerations
Readallinstructionsbeforeinstalling. Performthe stepsin the indicated
sequence. Have the tank inspected by a trained service technician at
least once every year. Failure to comply with these instructions can
result in severe, possibly fatal, personal injury as well as damage to
property and equipment.
Installation and servicing
▶Risk of fire from soldering and brazing!
Take appropriate protective measures when soldering and brazing as
the insulation is flammable, for example, cover the insulation.
▶ Ensure that only a licensed contractor installs or services the tank.
▶ Use installation material with adequate temperature stability.
Installation and commissioning
▶ Inthe Commonwealth of Massachusetts, the tank mustbe installed by
a licensed plumber.
▶ The electrical power must be connected by a licensed electrician.
The wiring diagram must be followed.
▶ Do not install this device in rooms with a high moisture level
(e.g. bathrooms, saunas).
Function
▶ Toensurethatthe tankfunctionsproperly,heedtheseinstallationand
maintenance instructions.
▶ Never close the blow-off line of the T&P safety valve. For safety
reasons, water may escape during heating.
Danger from electric shock
▶ Ensure that only an authorized contractor performs electrical work.
▶ Before performing electrical work, disconnect the power and secure
the unit against unintentional reconnection.
▶ Ensure the system has been disconnected from the power supply.
Risk of scalding at the hot water draw-off point
▶ When the tank is in operation, temperatures in excess of 122 °F
(50 °C) can occur. To limit the temperature at the tap, install a
thermostatic DHW mixing valve.
▶ Water heated for washing the laundry, dishes and for other cleaning
purposes can cause scalding and permanent injuries.
▶ Children, elderly, and handicapped persons are more likely to be
permanently injured by hot water. Never leave such individuals in the
tub or shower unattended under any circumstances. Children must
not be allowed to operate hot water faucets themselves or to fill a
bathtub.
▶ If the building has occupants in the above groups who operate hot
water faucets, or state laws / local ordinances stipulate specificwater
temperatures, take the following precautions:
– Use the lowest possible temperature setting.
– To prevent scalding, install a tempering device, such as an
automaticmixing valve,at hot watertap orwater heater. Selectand
install the automatic mixing valve in accordance with the valve
manufacturer's recommendations and instructions.
▶ Water exiting from drain valves can be extremely hot. To avoid
injuries:
– Check that all connections are tight.
– Direct exiting water away from people.
▶ Measuresmustbe takentoprotectagainstexcessivetemperatureand
pressure! Installation of a T&P safety valve is required.
Warnings are indicated by a warning triangle.
In addition, signal words at the beginning of a warning
are used to indicate the type and seriousness of the
ensuing risk if measures for minimizing damage are not
taken.
Important information that presents no risk to people or
property is indicated with this symbol. It is separated by
horizontal lines above and below the text.
Symbol Function
▶ Sequence of steps
Cross-reference to another part of this document
• Listing/list entry
– Listing/list entry (2nd level)
Tab. 1

1Safety Considerations and Symbol Descriptions
S 32/5 – 6 720 804 007 (2013/02)4
The chart below shows the relationship between water temperature and
time until there is a risk of scalding. It can be used as the basis for
determining the safest water temperature for your application.
To protect against corrosion and ensure compliance with the rules for
electrical safety, observe the following points:
▶ Use metal fittings for drinking water heating systems with plastic
piping.
▶ Use only original accessories from the manufacturer.
▶ When installation of the tank is complete, inspect the ground
conductor (including metal fittings).
Maintenance
Customers are advised to:
▶ Sign a maintenance and inspection contract with an authorized
contractor. Inspect and maintain the tank as necessary on a yearly
basis. Service as needed.
▶ Use only original spare parts.
Flooding
▶ After a flood, do not use the appliance if any part has been
submerged. Damage to appliances that have been submerged can be
quite severe and pose numerous safety risks.
▶ An appliance that was subject to flooding must be replaced.
1.3 Instructions for the owner and operator
▶ Explain the operation and handling of the heating system and tank,
making a particular point of safety-relevant features.
▶ Explain the function and how to check the T&P safety valve.
▶ Hand all enclosed documents over to the owner/operator.
▶Recommendation for the user: Sign a maintenance and inspection
contract with a licensed contractor.
▶ Highlight the following for the user:
– Water may be discharged from the T&P safety valve during heat-up.
– The blow-off line on the T&P safety valve must always be kept open.
– Check that the T&P safety valve operates properly at least once
yearly.
– The tank must be inspected annually and maintained as required.
Temperature Time to severe scalding
120 °F (48 °C) longer than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130 °F (54 °C) approx. 30 seconds
135 °F (57 °C) approx. 10 seconds
140 °F (60 °C) less than 5 seconds
145 °F (62 °C) less than 3 seconds
150 °F (65 °C) approx. 1.5 seconds
155 °F (68 °C) approx. 1 second
Tab. 2 Approximate time-temperature relationship until there is a risk
of scalding 1)
1) Source: Moritz, A.R. and Henriques, F.C.,Jr. (1947). Studies ofthermalinjury.II.
The relative importance of time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
WARNING: Risk of scalding at the taps!
There is a risk of scalding at the taps if the tank
temperature is set above 122 °F (50 °C) and during
thermal disinfection.
▶ Advise users that they should only draw off mixed
water. Otherwise, install a thermostatic DHW mixing
valve.
NOTICE: Risk of tank damage from excessively high
pressure.
▶ Never plug the discharge line of the T&P safety valve.

2
Product information
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2 Product information
2.1 Included items
•Tank
• Tank drain (factory installed)
• Installation and Service Instructions
• Compensating spring for aquastat or tank temperature sensor
•B-KIT
Fig. 1 B-kit
[1] Tee section 1" x 1" x ¾ "
[2] Temperature and pressure relief valve
[3] Coupling ¾ "(3x)
[4] Bracket for aquastat, screws for aquastat bracket (2x)
2.2 Intended use
The tank is designed for heating and storing drinking water. Please
observe national, regional, and local codes, regulations, guidelines and
standards for drinking water.
Install this tank only in sealed unvented hydronic heating systems.
Any other purpose is considered improper use. Any resulting damage is
excluded from the manufacturer's warranty.
Requirements for drinking water Unit
Water hardness, min. ppm
grain/US gallon
°dH
36
2.1
2
pH value, min. – max. 6.5 – 9.5
Conductivity, min. – max. μS/cm 130 – 1500
Tab. 3 Requirements for drinking water
6 720 801 773-13.1ITL
12
3
4

2Product information
S 32/5 – 6 720 804 007 (2013/02)6
2.3 Poduct description
Fig. 2 Poduct description
2.4 Rating plate
The data plate is located at the top rear of the tank.
2.5 Pressure drop curve of heating coil
Fig. 3 Pressure drop curve of heating coil
Example:
[A] 4 gpm
0.5 feet of head
6 720 801 773-14.1ITL
111098
4
5
2
3
76
1
12
Item Description
1Jacket, painted sheet metal with rigid polyurethane foam
insulation, 2" (50 mm)
2Magnesium anode
3Heat exchanger for heating by boiler, smooth enameled
tubing
4Sensor well for aquastat or boiler temperature sensor
5Tank, enameled steel
6Inspection port for service and cleaning, on the top
7PS top cover
8Boiler flow
9DHW outlet
10 Cold water inlet
11 Boiler return
12 Drain valve
Tab. 4 Description du produit
6 720 801 773-02.4ITL
flow rate [gpm]
Pressure drop [ft of head]
0
0.5
1
2
3
4
1.5
2.5
3.5
2 4 6 8 10 12
A

2
Product information
S 32/5 – 6 720 804 007 (2013/02) 7
2.6 Specifications
Unit S 32/5
Tank capacity
Tank capacity (total) gal
(l)
31.7
(120)
Max. flow rate gpm
(l/min)
3.2
(12)
Max. DHW temperature °F
(°C)
203
(95)
Max. operating pressure DHW psi
(bar)
145
(10)
Tank performance
Domestic cold water inlet temperature °F
(°C)
50
(10)
Domestic hot water outlet temperature °F
(°C)
140
(60)
DHW temperature rise °F
(°C)
90
(50)
Coil supply water temperature (boiler water) °F
(°C)
176
(80)
Coil flow rate (boiler water) gpm
(l/h)
11.45
(2600)
Coil pressure drop (boiler water) f o h
(mbar)
3.38
(101)
Continuous rating gph
(l/h)
120
(456)
gpm
(l/min)
2
(8)
First hour rating gph
(l/h)
143
(540)
Max. heat input to tank btu/hr
(kW)
90422
(26,5)
Heat exchanger
Contents gal
(l)
1.8
(6,8)
Surface area ft2
(m2)
10-3/4
(1,0)
Standby heat loss (149 °F (65 °C) DHW temperature, 68 °F (20 °C) room temperature) °F/h
(K/h)
0.59
(0,33)
Max. coil supply water temperature °F
(°C)
230
(110)
Max. coil operating pressure psi
(bar)
232
(16)
Tab. 5 Specifications

2Product information
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2.7 Physical and connection dimensions
Fig. 4 Physical and connection dimensions
6 720 801 773-12.2T
F
G
H
E
A
D
B
C3/4II
Item Description Unit S 32/5
A Minimum floor weight carrying
capacity
Ib
(kg)
424
(192)
B Weight (empty) Ib
(kg)
160
(72)
C Weight (full) Ib
(kg)
424
(192)
D Diameter inch
(mm)
21-3/4
(550)
E Height of drain valve inch
(mm)
8-1/2
(218)
F Clearance off floor inch
(mm)
1/2
(12.5)
G Height of connections inch
(mm)
38-5/8
(980)
HMinimum room height for anode
replacement
inch
(mm)
57-1/2
(1460)
Tab. 6 Physical and connection dimensions

3
Standards, regulations and directives
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3 Standards, regulations and directives
4 Moving the tank
▶ Position the dolly at the back of the packed tank.
▶ Secure the tank to the means of transportation with a strap.
▶ Transport the tank to the installation location.
▶ Only remove the tank from the packaging at the installation location.
Fig. 5 Transporting with a dolly
5 Installation
The tank is delivered fully assembled.
▶ Check that the tank is complete and undamaged.
5.1 Boiler installation
5.1.1 Requirements for installation location
▶ Place the tank on a raised platform if there is a risk that water may
collect at the installation site.
▶ The installation site must be a dry and frost-free room.
▶ Observe the minimum room height (Tab. 6, page 8) in the
installation room. No minimum wall clearance required.
▶ Maintainadistanceof2" (51 mm) fromheatedpipesandcombustible
surfaces.
Observe all national, state, and local code, regulations
and standards applicable toinstallation and operation of
the tank!
All electrical components must be approved for the USA
and Canada.
WARNING: Risk of injuryfrom carrying heavy loads and
inadequately securing loads for transport!
▶ Use suitable means oftransportation,e.g.a dollywith
strap.
▶ Secure the load against falling.
Where possible, do not remove the tank from its
packaging until it has reached the installation location.
This ensures protection during handling.
6 720 800 035-03.1ITL
NOTICE: Risk of damage from inadequate load-bearing
capacity of the supporting substructure or unsuitable
floor surface!
▶ Ensure that the installation area is level and offers
sufficient load-bearing capacity.
NOTICE: Risk of damage from stress cracking and
corrosion!
▶ Position the tank in a dry room free from the risk of
freezing.
▶ Installthetankonlyinclosed-loop,unventedhydronic
heating systems.
▶ Open expansion vessels may NOT be used with this
tank.
NOTICE: Install an adequate drain pan if required by
code, orifa leak couldresultin property damage. Follow
drain pan manufacturer's instructions.
At least 19" (480 mm) clearance needed above the tank
for magnesium anode removal.

5Installation
S 32/5 – 6 720 804 007 (2013/02)10
5.1.2 Positioning the tank
▶ Unpack the tank by removing the wrap, wooden boards and foam pad
on the top.
▶ Lay the foam pad on the floor to serve as a mat.
Fig. 6 Unpacking the tank
▶ Carefully lay the tank on the foam pad (Fig. 7, [1]).
▶ Cut out the projections in the foam bottom (Fig. 7, [2]).
▶ Unscrew the screw-in feet [3].
Fig. 7 Laying the tank on its side and exposing the adjustable feet
▶ Position the tank on a level floor that has adequate load-bearing
capacity (Fig. 8).
Fig. 8 Positioning the tank
▶ With the aid of the adjustable feet, align the tank vertically (Fig. 8).
▶ Remove the protective caps from the connections.
▶ Use Teflon tape or Teflon cord to seal the connections. Do not use
hemp to seal the connections.
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1.
2.
3.
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5
Installation
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5.2 Water connections
5.2.1 Connecting the tank on the water side
System example with all recommended valves and shut-offs (Fig. 9).
Fig. 9 Installation example
[1] Tank coil supply
[2] DHW outlet
[3] Cold water inlet
[4] Boiler return
▶ Use installation material that is heat-resistant to 230 °F (110 °C).
▶ Never use open, vented expansion vessels.
▶ Use metal connection fittings in water heating systems with plastic
lines.
▶ If using a check valve in the cold water supply: Install a safety valve
between the non-return valve and the cold water inlet.
▶ Install a pressure reducer if the static supply water system pressure is
in excess of 72.5 psi (5 bar).
5.2.2 Installing a T&P safety valve (on-site)
▶ Install a listed T&P safety valve that is approved for drinking water
(≥¾ ")in the DHW outlet.
▶ This tank must be installed with a new T&P safety valve.
▶ The T&P valve must be sized no smaller than the rated tank capacity.
▶ Observe the safety valve installation instructions.
▶ T&P discharge pipe:
– The discharge pipe must be at least equal to the outlet cross-
section of the safety valve.
– Route the discharge line from the T&P valve directly to an adequate
drain (maximum length 6 ft (2m) with no more than two 90°-
elbows).
– The discharge line must terminate at an adequate drain in order to
prevent property damage from spillage.
– Check that the T&P safety valve operates properly at least once
annually.
▶ Neverplug theblow-offline. Duringheating, water may be discharged
for operational reasons at any time.
5.3 Install a tank water temperature sensor (accessory)
or aquastat (accessory)
Install a tank temperature sensor or an aquastat on the tank to measure
and monitor the hot water temperature.
DANGER: Risk of fire from soldering and brazing!
▶ Take appropriate safety measures when soldering
and brazing as the thermal insulation is flammable.
For example, cover up the thermal insulation.
▶ Check tank jacket for damage after completing work.
DANGER: Risk of injury from contaminated water!
Work carried out without due care for cleanliness
contaminates the drinking water.
▶ Install in accordance with national standards and
guidelines.
NOTICE: Risk of corrosion from damage to the enamel
finish!
▶ Tighten connections to the tank only "hand-tight".
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123
2
3
4
DANGER: Risk of fatal injury from electric shock!
▶ Isolate the system electrically prior to commencing
work on the system.
Connectthe electrical power and set thetemperature on
theDHWtemperaturesensoror theaquastatas shownin
the respective aquastat or control manufacturer's
instructions.

5Installation
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Installing the DHW temperature sensor
▶ Take the tank temperature sensor [3] from the scope of delivery of
the control panel (accessories).
▶ Insert the temperature sensor and compensation spring [2] in the
sensor well [1] and push fully home.
The compensating spring [2] ensures contact between the sensor well
and sensor surfaces, and a reliable temperature reading.
Fig. 10 Installing the DHW temperature sensor
[1] Sensor Well
[2] Compensating spring
[3] Temperature sensor
▶ Route the sensor lead to the boiler or control panel and ensure the
cable is not strained. This cable must not be in contact with any hot
boiler parts.
▶ In the case a sensor is being used without a compensating spring, the
empty space in the sensor well mustbe filled with a sufficient amount
of heat-conducting paste.
Installing aquastat
▶ Remove cover from the aquastat. To do so, undo the screwon the top.
▶ If necessary, remove any unnecessary attachments. Attach bracket
[3] to Aquastat [2] by means of 2 self-tapping screws [1].
Fig. 11 Attaching the aquastat to the bracket
[1] Self-tapping screws C-ST 4.2x13 mm
[2] Aquastat
[3] Bracket
▶ Feed the temperature sensor [4] with the compensating spring [5]
into the sensor well [3].
▶ Attach Aquastat [2] to tank by means of 2 self-tapping sheet metal
screws [1].
▶ Replace the cover of the aquastat [2].
Fig. 12 Installing aquastat
[1] Self-tapping screws C-ST 4.2x13 mm
[2] Aquastat
[3] Sensor Well
[4] Temperature sensor
[5] Compensating spring
Always ensure that the full length of the sensor surface is
in contact with the sensor well.
1
2
3
6 720 801 773-08.1ITL
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2
1
3
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2
1
3
5
4

6
Commissioning
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Fig. 13 Connecting the tank components
[1] Tee section with P&T safety valve
[2] Bracket with aquastat
[3] Drain valve
[4] Coupling
6 Commissioning
6.1 Commissioning the tank
Have the installer of the heating system or a qualified contractor
commission the equipment.
▶ Commission the boiler and additional accessories in accordance with
manufacturer's instructions or the appropriate installation and
operating instructions.
▶ To bleed air from the tank, open the highest tap/valve.
▶ To fill the tank, open the shut-off valve for the cold water inlet.
▶ Flush the tank and piping thoroughly prior to commissioning.
▶ Before heating up, verify that the boiler, tank and pipework are filled
with water.
▶ Check all connections, piping and the inspection port for leaks.
7 Shutdown
7.1 Shutting down the tank
▶ Switch off the temperature controller at the control panel, shut of the
heating system emergency shutoff switch, or disengage the heating
system circuit breaker.
▶ Close the cold water inlet shutoff valve.
▶ Drain the tank via the drain valve by opening the highest faucet.
▶ Close the shut-off valves to and from the boiler.
▶ Depressurize the heat exchanger.
▶ Drain and blow out the heat exchanger.
▶ To prevent corrosion, dryout the inner space and keep the inspection
port covers open.
7.2 Shuttingdown theheatingsystem when thereisarisk
of frost
▶ Shut down the heating system and the tank as shown in chapter 7.1.
6 720 801 773-03.4ITL
2
1
4
3
NOTICE: Risk of system damage from excessive
pressure!
Excessive pressure can result in tension cracks in the
enamel coating.
▶ Never plug the discharge line of the T&P safety valve.
Use only drinking water to check the tank for leaks. On
theDHWside,the testpressuremust notexceed145 psi
(10 bar) gauge pressure.
WARNING: Risk of scalding from hot water!
▶ Let the tank cool down sufficiently.
Fully drain the tank – even the lowest section of the tank
and the heating coil.

8Environmental Protection / Disposal
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8 Environmental Protection / Disposal
Environmental protection is a fundamental principle of the
Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us.All legislation pertaining tothe environment
is strictly observed.
Packaging
For the packaging, we participate in the country-specific recycling
systems, which guarantees optimal recycling. All packaging materials
used are environmentally-friendly and recyclable.
Old appliances
Old appliances contain materials that should be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. This allows the various components to be sorted for
appropriate recycling or disposal.
9 Maintenance
▶ Allow the tank to cool down sufficiently before performing any
maintenance.
▶ Carry out cleaning and maintenance procedures in the specified
intervals.
▶ Remedy all faults immediately.
▶ Use original spare parts only!
▶ The tank must be inspected annually and maintained as required.
9.1 Testing relief valve
▶ Check the T&P safety valve annually.
9.1.1 Drain the tank
▶ Isolate the tank on the DHW side from the piping by closing the shut-
off valves.
▶ Open a high-level tap to vent the system.
▶ Open drain valve (Fig. 2 [12], page 6).
9.1.2 Descaling/cleaning the tank
▶ Close the cold water inlet shutoff valve.
▶ Drain the tank via the drain valve by opening the highest faucet.
▶ Check the tank interior for contamination (lime scale deposits,
sediment).
▶ Hose down the inside of the tank.
Fig. 14 Hosing down the inside of the tank
▶ Use a wet & dry vacuum cleaner with plastic suction hose to remove
the residues.
▶ Seal the plug back into the inspection port.
In order to improve the cleaning effect, heat up the
indirect coil prior to hosing them down with a water jet.
The thermal shock effect helps to loosen encrustations
(e. g. lime deposits).
NOTICE: Damage to the enamel finish!
▶ Do not use tools for the removal of deposits from the
interior of the tank as it may damage the enamel liner.
6 720 801 773-04.1ITL
72 Psi (5 bar)
50 °F (10 °C)

9
Maintenance
S 32/5 – 6 720 804 007 (2013/02) 15
9.1.3 Checking the magnesium anode
The purpose of the anode rod is to protect the tank against corrosion. It
is critical that the anode rod be inspection once a year to determine
whether it requires replacing.
Uponinspection,theanode rodsurfaceshould appearsmooth.Ifthe rod
surface appears pitted, bumpy, rusty, scale has built up on the surface,
or if the rod is less than 5/8" (15 mm) in diameter, then it must be
replaced.
Certain installations may require more frequent replacement of the
anode rod:
• Recirculation applications,
• Poor water quality,
• Galvanic/electrolytic corrosion,
• High flow applications.
In the event of poor water quality it is recommended that a water
treatment professional be consulted for water treatment options.
Damage resulting from failure to replace the anode rod is not covered
under tank warranty.
▶ Shut off the cold water inlet and DHW outlet.
▶ Depressurize the tank.
▶ Remove and inspect the magnesium anode.
Fig. 15
9.2 Re-commissioning after performing maintenance
▶ Re-commission the tank by following the procedure in chapter 6.1.
If the magnesium anode is not serviced properly, the
warranty is void.
Annual service records must be kept in a safe location
and submitted together with the original purchase
receipt in the event of a warranty claim.
Never bring the magnesium anode surface in contact
with oil or grease.
▶ Keep everything clean.
6 720 801 708-12.1ITL
1.
2.

10 Spare Parts
S 32/5 – 6 720 804 007 (2013/02)16
10 Spare Parts
Fig. 16 Spare parts for S 32/5
1
6
3
22
13
17
13
14
10
7
6 720 801 773-06.3ITL
9
5

10
Spare Parts
S 32/5 – 6 720 804 007 (2013/02) 17
Item Article description Product No. Number
1 Cover lid set D550 8 718 543 403 0 1
2Cap, white 8 718 543 369 0 1
3 Plug G1 ½ with PTFE ring 63004276 1
5Screw ISO4017 M10x30 A3K 7 747 022 050 10
6 Temperature sensor well 1- ¼ " (31.5 mm) Hostalen 7 747 020 191 1
7Temperature sensor well 32-1/3" (820 mm) Hostalen 7 747 020 190 1
9 Drain valve ½ " 63005974 1
10 Anode G1" D26x505 mm 8 718 571 347 0 1
13 Sheet metal screw St 4.2x13 7 747 027 696 10
14 Retaining plate for the aquastat 63032088 1
17 Spring clip 8 718 224 081 0 1
Logo Buderus 8 718 541 573 0
Tab. 7

Sommaire
S 32/5 – 6 720 804 007 (2013/02)18
Sommaire
1 Consignes de sécurité et explication des symboles . . . . . . . 19
1.1 Explication des symboles . . . . . . . . . . . . . . . . . . . . . . . . 19
1.2 Consignes de sécurité . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.3 Initiation de l’utilisateur . . . . . . . . . . . . . . . . . . . . . . . . . 20
2 Informations produit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.1 Pièces fournies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2 Utilisation conforme . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3 Description du produit . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.4 Plaque signalétique . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.5 Courbe des pertes de pression échangeur thermique . 22
2.6 Données techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.7 Dimensions de construction et de raccordement . . . . 24
3 Normes, prescriptions et directives . . . . . . . . . . . . . . . . . . . . 25
4 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 Montage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1.1 Exigences requises pour le lieu d’installation . . . . . . . . 25
5.1.2 Mise en place du ballon d’eau chaude sanitaire . . . . . . 26
5.2 Raccordements hydrauliques . . . . . . . . . . . . . . . . . . . . 27
5.2.1 Effectuer le raccordement hydraulique du ballon
d’eau chaude sanitaire . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.2 Installer la soupape de sécurité pour la température
et la pression (sur site) . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Monter la sonde de température du ballon solaire
(accessoire) ou l’aquastat (accessoire) . . . . . . . . . . . . 27
6 Mise en service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1 Mise en service du ballon d’eau chaude sanitaire . . . . . 29
7 Mise hors service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.1 Mise hors service du ballon d’eau chaude sanitaire . . . 29
7.2 Mise hors service de l’installation de chauffage
en cas de risques de gel . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Protection de l’environnement/Recyclage . . . . . . . . . . . . . . . 30
9 Entretien . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.1 Contrôler la soupape de sécurité . . . . . . . . . . . . . . . . . . 30
9.1.1 Vidanger le préparateur d’ECS . . . . . . . . . . . . . . . . . . . 30
9.1.2 Détartrer/nettoyer le ballon ECS . . . . . . . . . . . . . . . . . . 30
9.1.3 Contrôle de l’anode au magnésium . . . . . . . . . . . . . . . . 31
9.2 Remise en service après l'entretien . . . . . . . . . . . . . . . . 31
10 Pièces de rechange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

1
Consignes de sécurité et explication des symboles
S 32/5 – 6 720 804 007 (2013/02) 19
1 Consignes de sécurité et explication des
symboles
1.1 Explication des symboles
Avertissements
Les mots de signalement suivants sont définis et peuvent être utilisés
dans le présent document :
•AVIS signale le risque de dégâts matériels.
•PRUDENCE signale le risque d'accidents corporels légers à moyens.
•AVERTISSEMENT signale le risque d’accidents corporels graves à
mortels.
•DANGER signale le risque d’accidents graves à mortels.
Informations importantes
Autres symboles
1.2 Consignes de sécurité
Lisez attentivement toutes les consignes avant l’installation. Exécuter
les étapes dans l’ordre indiqué. Faire contrôler le ballon d’eau chaude
sanitaire par un technicien qualifié au moins une fois par an. Le non-res-
pect de ces consignes peut entraîner des accidents graves voire mortels
et/ou des dégâts matériels.
Montage et entretien
▶Risque d’incendie en raison des travaux de soudure !
L’isolation thermique étant inflammable, prendre des mesures de
sécurité appropriées pour effectuer tous les travaux de brasage et de
soudage, en recouvrant l’isolation thermique par exemple.
▶ S’assurer que les travaux d’installation et de maintenance sont exclu-
sivement réalisés par un professionnel agréé.
▶ Utiliser des matériaux suffisamment résistants aux températures éle-
vées.
Installation et mise en service
▶ Au « Commonwealth of Massachusetts », le ballon d’eau chaude sani-
taire doit être mis en place par un installateur agréé.
▶ Faire réaliser les branchements électriques exclusivement par un
électricien agréé. Respecter le schéma de connexion !
▶ Ne pas monter cet appareil dans des pièces humides (par ex. salle de
bain, sauna).
Fonction
▶ Respecter cette notice d’installation et d’entretien afin de garantir un
fonctionnement parfait.
▶ Ne pas obturer la conduite de purge de la soupape de sécurité T&D.
Pendant le chauffage, de l’eau risque de s’écouler pour des raisons de
sécurité.
Risques d’électrocution
▶ S’assurer que les travaux électriques sont réalisés exclusivement par
un électricien autorisé.
▶ Avant de commencer les travaux d’électricité, couper le courant du
câble d’alimentation sur tous les pôles et protéger l’installation contre
tout réenclenchement involontaire.
▶ Vérifier que l’installation est hors tension.
Risques de brûlure aux points de puisage de l’eau chaude sanitaire
▶ Les températures du ballon d’eau chaude sanitaire pendant son fonc-
tionnement peuvent dépasser 122 °F (50 °C). Pour limiter la tempé-
rature de puisage, installer un mélangeur thermostatique.
▶ L’eau chauffée utilisée pour la lessive, la vaisselle et d’autres tâches
de nettoyage peut provoquer des brûlures et des blessures perma-
nentes.
▶ Chez les enfants, les personnes âgées et sénile ou mentalement han-
dicapée, il existe un risque accru de blessure permanente à l’eau
chaude. Ne jamais laisser ces personnes sans surveillance dans la bai-
gnoire ou sous la douche. Ne pas autoriser les jeunes enfants à action-
nereux-mêmesles robinetsd’eauchaude oude remplir unebaignoire.
▶ Si dans unbâtiment les personnes comprises dans les catégories pré-
cédemment citées actionnent des robinets d’eau chaude ou si les
directives locales imposent des températures précises pour les robi-
nets d’eau chaude, prendre les mesures spécifiques suivantes :
– Utiliser le réglage de température le plus bas possible.
Les avertissements sont indiqués dans le texte par un
triangle de signalisation.
En outre, les mots de signalement caractérisent le type
et l’importance des conséquences éventuelles si les me-
sures nécessaires pour éviter le danger ne sont pas res-
pectées.
Les informations importantes ne concernant pas de si-
tuations à risques pour l'homme ou le matériel sont si-
gnalées par le symbole ci-contre. Elles sont limitées par
des lignes dans la partie inférieure et supérieure du
texte.
Symbole Signification
▶Étapeàsuivre
Renvois à un autre passage dans le document
• Énumération / Enregistrement dans la liste
– Énumération / Entrée de la liste (2e niveau)
Tabl. 1

1Consignes de sécurité et explication des symboles
S 32/5 – 6 720 804 007 (2013/02)20
– Installer une sécurité anti-brûlure, par ex. une vanne mélangeur
automatique,sur le robinet d’eau chaude ou le chauffe-eau. Choisir
et installer la vanne mélangeur automatique en fonction des recom-
mandations et consignes du fabricant de la vanne.
▶ L’eau s’échappant des vannes de vidange peut être extrêmement
chaude. Pour éviter les blessures :
– Assurer l’étanchéité des raccordements.
– Eloigner les écoulements d’eau de toute personne.
▶ Prendre des mesures de protection contre les températures et pres-
sions tropélevées ! Installer impérativement une soupape de sécurité
pour la température et la pression.
Le tableau suivant présente le rapport entre la température de l’eau et le
temps nécessaire à l’apparition de brûlures. Vous pouvez ainsi détermi-
ner les températures d’eau les plus sûres pour votre application.
Pour maintenir la protection anti-corrosion et respecter les règles de
sécurité électrique, veuillez tenir compte des points suivants :
▶ Sur les installations de réchauffage d’eau potable équipées de
conduites en plastique, utiliser des raccords métalliques.
▶ Utiliser des accessoires d’origine.
▶ Après avoir terminé l’installation complète du ballon, effectuer un
contrôler des courants de fuite (inclure également les raccords-
unions métalliques de raccordement).
Entretien
Recommandation pour le client :
▶ Conclure un contrat d’entretien et d’inspection avec un chauffagiste
professionnel ou avec le service après-vente My Service. Inspecter le
ballon une fois par an et faire les travaux de maintenance si néces-
saire. Travaux de service en fonction des besoins.
▶ Utiliser uniquement des pièces de rechange d’origine.
Inondation
▶ Ne pas utiliser l’appareil après l’inondation si l’un des composants
était sous eau. Les éventuels dommages subis par les appareils sub-
mergés peuvent être très importants et cacher de nombreux risques
pour la sécurité.
▶ Chaque appareil submergé doit être remplacé.
1.3 Initiation de l’utilisateur
▶ Expliquer comment utiliser et manipuler l'installation de chauffage et
le ballon d'eau chaude et attirer l’attention sur les problèmes de sécu-
rité technique.
▶ Expliquer le fonctionnement et le contrôle de la soupape de sécurité
T&D.
▶ Remettre à l’utilisateur tous les documents ci-joints.
▶Recommandation destinée à l’exploitant : conclure un contrat
d’entretien et d’inspection avec un professionnel agréé.
▶ Attirer l’attention de l’utilisateur sur les points suivants :
– Pendant la mise en température, de l’eau peut s’écouler par la sou-
pape de sécurité T&D.
– La conduite de purge de la soupape de sécurité T&D doit toujours
rester ouverte.
– Vérifier le bon fonctionnement de la soupape de T&Dau moins une
fois par an.
– Inspecter le ballon une fois par an et le nettoyer si nécessaire.
Température Temps jusqu’à brûlure importante
120 °F (48 °C) plus de 5 minutes
125 °F (51 °C) 1,5 à 2 minutes
130 °F (54 °C) env. 30 secondes
135 °F (57 °C) env. 10 seconde
140 °F (60 °C) moins de 5 secondes
145 °F (62 °C) moins de 3 secondes
150 °F (65 °C) env. 1,5 seconde
155 °F (68 °C) env. 1 seconde
Tabl. 2 Rapport approximatif temps-température lors de l’apparition de
brûlures 1)
1) Source : Moritz, A.R. and Henriques, F.C., Jr. (1947). Etudes sur les blessures
thermiques. II. L’importance relative du temps et de la température de surface à
l’origine des brûlures de la peau, American Journal of Pathologie, 23, 695-720.
AVERTISSEMENT : Risques de brûlure aux points de
puisage de l’eau chaude sanitaire !
Si la température d’eau chaude sanitaire est réglée à
plus de 122 °F (50 °C) et pendant la désinfection ther-
mique, il y a risque de brûlures aux points de puisage de
l’eau chaude sanitaire.
▶ Rendre le client attentif au fait que l’eau chaude ne
peut pas être ouverte sans la mélanger avec de l’eau
froide. Dans le cas contraire, installer un mélangeur
thermostatique.
AVIS: Dégâtssur leballon dusàunepressionélevéenon
autorisée.
▶ Ne jamais obturer la conduite de purge de la soupape
de sécurité pour la température et la pression.