Buderus S 32/5 Installation And Maintenance Instructions Manual
6 720 801 773-00.2ITL
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. Failure to
follow these instructions can result in severe injury,
death or property damage.
DANGER:
Cette notice d’installation doit être utilisée uniquement par des installateurs chauffagistes ou des
techniciens de maintenance qualifiés. Lisez attentivement toutes les consignes avant l’installation.
Exécutez les actions précisément dans l’ordre indiqué. En cas de non-respect, vous risquez de subir
de sérieuses blessures pouvant conduire à la mort
ou d’entraîner de lourds dommages matériels.
Installation and maintenance instructions
Notice d’installation et d’entretien
S 32/5
[en] Installation and maintenance instructions for the contractor . . . . . . . . . . . . 2
[fr] Notice d'installation et d'entretien pour le professionnel . . . . . . . . . . . . . . . 18
Read carefully prior to installation and maintenance.
6 720 804 007 (2013/02) US/CA
À lire attentivement avant le montage et la maintenance.
Table of Contents
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
S 32/5 – 6 720 804 007 (2013/02)2
1 Safety Considerations and Symbol
Descriptions
1.1 Explanation of symbols
Warnings
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.
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
Safety Considerations and Symbol Descriptions
1
1.2 Safety considerations
Read all instructions before installing. Perform the steps in 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
▶ In the Commonwealth of Massachusetts, the tank must be 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).
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.
Additional symbols
Symbol Function
▶ Sequence of steps
Cross-reference to another part of this document
• Listing/list entry
– Listing/list entry (2nd level)
Tab. 1
Function
▶ To ensure that the tank functions properly, heed these installation and
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 specific water
temperatures, take the following precautions:
– Use the lowest possible temperature setting.
– To prevent scalding, install a tempering device, such as an
automatic mixing valve, at hot water tap or water heater. Select and
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.
▶ Measures must be taken to protect against excessive temperature and
pressure! Installation of a T&P safety valve is required.
S 32/5 – 6 720 804 007 (2013/02) 3
1
Safety Considerations and Symbol Descriptions
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.
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) Source: M oritz, A.R. and Henriques, F.C., Jr. (1947). Studies of thermal injury. II.
The relative importance of time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
1)
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.
1.3 Instructions for the owner and operator
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.
▶ 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.
– T he 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.
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.
S 32/5 – 6 720 804 007 (2013/02)4
2 Product information
6 720 801 773-13.1ITL
1
2
3
4
2.1 Included items
•Tank
• Tank drain (factory installed)
• Installation and Service Instructions
• Compensating spring for aquastat or tank temperature sensor
•B-KIT
Product information
2
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
pH value, min. – max. 6.5 – 9.5
Conductivity, min. – max. μS/cm 130 – 1500
Tab. 3 Requirements for drinking water
36
2.1
2
S 32/5 – 6 720 804 007 (2013/02) 5
2
6 720 801 773-14.1ITL
111098
4
5
2
3
76
1
12
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
Product information
2.3 Poduct description
Fig. 2 Poduct description
Item Description
1 Jacket, painted sheet metal with rigid polyurethane foam
insulation, 2" (50 mm)
2 Magnesium anode
3 Heat exchanger for heating by boiler, smooth enameled
tubing
4 Sensor well for aquastat or boiler temperature sensor
5 Tank, enameled steel
6 Inspection port for service and cleaning, on the top
7 PS top cover
8 Boiler flow
9 DHW outlet
10 Cold water inlet
11 Boiler return
12 Drain valve
Tab. 4 Description du produit
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
S 32/5 – 6 720 804 007 (2013/02)6
2.6 Specifications
Unit S 32/5
Tank capacity
Tank capacity (total) gal
(l)
Max. flow rate gpm
(l/min)
Max. DHW temperature °F
(°C)
Max. operating pressure DHW psi
(bar)
Tank performance
Domestic cold water inlet temperature °F
(°C)
Domestic hot water outlet temperature °F
(°C)
DHW temperature rise °F
(°C)
Coil supply water temperature (boiler water) °F
(°C)
Coil flow rate (boiler water) gpm
(l/h)
Coil pressure drop (boiler water) f o h
(mbar)
Continuous rating gph
(l/h)
gpm
(l/min)2(8)
First hour rating gph
(l/h)
Max. heat input to tank btu/hr
(kW)
Heat exchanger
Contents gal
(l)
Surface area ft
Standby heat loss (149 °F (65 °C) DHW temperature, 68 °F (20 °C) room temperature) °F/h
Max. coil supply water temperature °F
Max. coil operating pressure psi
Tab. 5 Specifications
2
(m2)
(K/h)
(°C)
(bar)
31.7
(120)
3.2
(12)
203
(95)
145
(10)
50
(10)
140
(60)
90
(50)
176
(80)
11.45
(2600)
3.38
(101)
120
(456)
143
(540)
90422
(26,5)
1.8
(6,8)
10-3/4
(1,0)
0.59
(0,33)
230
(110)
232
(16)
Product information
2
S 32/5 – 6 720 804 007 (2013/02) 7
2
Product information
2.7 Physical and connection dimensions
B
C
A
Fig. 4 Physical and connection dimensions
E
D
3/4
II
H
G
F
6 720 801 773-12.2T
Item Description Unit S 32/5
A Minimum floor weight carrying
capacity
B Weight (empty) Ib
C Weight (full) Ib
D Diameter inch
E Height of drain valve inch
F Clearance off floor inch
G Height of connections inch
H Minimum room height for anode
replacement
Tab. 6 Physical and connection dimensions
Ib
(kg)
(kg)
(kg)
(mm)
(mm)
(mm)
(mm)
inch
(mm)
424
(192)
160
(72)
424
(192)
21-3/4
(550)
8-1/2
(218)
1/2
(12.5)
38-5/8
(980)
57-1/2
(1460)
S 32/5 – 6 720 804 007 (2013/02)8
Standards, regulations and directives
6 720 800 035-03.1ITL
3
3 Standards, regulations and directives
Observe all national, state, and local code, regulations
and standards applicable to installation and operation of
the tank!
All electrical components must be approved for the USA
and Canada.
4 Moving the tank
WARNING: Risk of injury from carrying heavy loads and
inadequately securing loads for transport!
▶ Use suitable means of transportation, e.g. a dolly with
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.
▶ 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.
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
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.
▶ Install the tank only in closed-loop, unvented hydronic
heating systems.
▶ Open expansion vessels may NOT be used with this
tank.
NOTICE: Install an adequate drain pan if required by
code, or if a leak could result in property damage. Follow
drain pan manufacturer's instructions.
At least 19" (480 mm) clearance needed above the tank
for magnesium anode removal.
Fig. 5 Transporting with a dolly
▶ 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.
▶ Maintain a distance of 2" (51 mm) from heated pipes and combustible
surfaces.
S 32/5 – 6 720 804 007 (2013/02) 9
5
6 720 800 035-04.1ITL
6 720 801 769-15.1ITL
1.
2.
3.
6 720 801 769-13.1ITL
Installation
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.
▶ 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. 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]).
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.
S 32/5 – 6 720 804 007 (2013/02)10
Installation
5
5.2 Water connections
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".
5.2.1 Connecting the tank on the water side
System example with all recommended valves and shut-offs ( Fig. 9).
2
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.
▶ Never plug the blow-off line. During heating, water may be discharged
for operational reasons at any time.
5.3 Install a tank water temperature sensor (accessory)
or aquastat (accessory)
DANGER: Risk of fatal injury from electric shock!
▶ Isolate the system electrically prior to commencing
work on the system.
3
123
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 pre ssure reducer if the static supply water system pressure is
in excess of 72.5 psi (5 bar).
4
6 720 801 773-10.1ITL
Connect the electrical power and set the temperature on
the DHW temperature sensor or the aquastat as shown in
the respective aquastat or control manufacturer's
instructions.
Install a tank temperature sensor or an aquastat on the tank to measure
and monitor the hot water temperature.
S 32/5 – 6 720 804 007 (2013/02) 11
Loading...