IBAIONDO AR-S Specification sheet
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1. Product content
•Puffer storage tank
•Fittings on connections
•Transparent plastic bag with:
oEnergy efficiency sticker (Models: 20 - 1.500 Litres)
oThree adhesive chocks (Models: 30 - 300 Litres)
oInstallation and use manual
2. General
Hot water tanks made of black steel with hydraulic connections to allow installation and combination in
cooling systems and heat pumps.
All models feature CFC-free thermal insulation, which minimizes heat loss in the storage tank, therefore
favouring energy savings and complying with current regulations in this area. They come in different
configurations. The accumulators of the AR-S range are specially designed for installation in false ceilings.
All models comply with the European Pressure Equipment Directive 2014/68/EU (Art. 4.3).
3. Application
The buffer storage tanks of the AR-A series are designed for exclusive use in closed cooling circuits and
heat pumps. The tanks are not internally coated and should therefore not be installed in a secondary (open)
circuit. They are not suitable for domestic hot water (DHW).
They are installed in those systems with thermal inertia, where the accumulation of energy is an essential
factor for the efficient operation of the system, allowing to reduce the number of starts and stops of the
groups when there are rapid temperature variations.
4. Arrival control
Check immediately that the equipment corresponds to the order and that all components are in perfect
condition and that the correct operating instructions are enclosed. It is especially important to check the
buffer tank for possible deformations that could affect its resistance. If defects or damage are found, contact
the manufacturer immediately.
Check that the data on the sticker affixed to the buffer tank matches the purchase specification and is suitable
for the installation. Before proceeding with the installation, make sure that the technical staff has an
appropriate profile and training in the installation of this type of equipment. In any case, the local regulations
in force for the operation of such equipment must be considered. Installation and operation must be carried
out in accordance with good practice by professional installers and authorised technical personnel.
The manufacturer shall not assume any liability for damage caused by improper transportation, nor shall any
damage caused by improper installation or misuse of the product be attributable to the manufacturer.
5. Normativa de montaje
In addition to national regulations and directives, the following installation regulations must be observed:
DIN 1988 Technical rules for domestic hot water installations
DIN 4708 Centralised water heating systems
DIN 4753 Storage tanks and heating systems for domestic hot water and primary heating systems
DIN 18380 Heating systems and centralised water heating systems
DIN 18381 Gas, water and drainage installations inside buildings
DIN EN 12828 Heating installations in the building. Design of DHW systems
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EN 12897 Heat transfer to water - Specified for indirectly heated water heaters and pressure storage tanks
(closed).
EN 12975 Solar thermal installation and its components.
6. Installation
They shall be installed in a weatherproof enclosure having the necessary access dimensions to facilitate
inspection of the accumulator.
The installation in which the puffer tank is placed must provide for the installation of a safety system to limit
the pressure and ensure that the pressure does not exceed the upper design limit of the buffer tank. The
maximum working pressure value and pressure differentials must be taken into account when selecting a
suitable safety relief valve.
The safety relief valve (DIN4753 Part 1 section 6.3.2) shall be installed by a T-connection at the upper
connection V of the buffer storage tanks. It shall be connected directly to the storage tank, without any
interposed valve, which would allow it to be shut off. An air vent shall be fitted at the other end of the T
connection. The valve shall be accessible and mounted vertically.
If the heating capacity of the storage tank is higher than indicated forthe nominal volumes given in the table,
a suitably dimensioned safety relief valve must be used.
¡¡¡ The opening pressure of the safety relief valve must be at
most equal to the working pressure of the tank!!!
The warning according to DIN 4753 part 1 section 6.3.4.2 must be read on the safety relief valve:
¡¡¡ During the heating phase, for safety reasons, water may
escape from the exhaust duct!!!
¡¡¡ Keep the exhaust pipe open!!!
Safety valve evacuation pipeline: The evacuation of boiling water and steam must not endanger people.
The discharge lines of 2 or more safety valves must lead freely and separately to a drainage point.
The exhaust duct must be made with the same outletsectionas the safety valve. It must not have more than
2 bends or be longer than 2 metres. If more than 2 bends or more than 2 metres in length are unavoidable,
the cross-section of the exhaust duct must be increased accordingly. More than 3 bends and a duct length
of more than 4 metres shall never be permissible.
The end of the drainpipe must be clearly visible, protruding 20 to 40 mm above the drain pan or drain trap.
The duct outlet must be within the ice protected area.
It is recommended to install a pressure reducer when the pressure in the network exceeds 4 bar.
Provide for the installation of a correctly dimensioned expansion vessel (EN12828). Ensure the correct
functioning of the selected safety devices (safety valve, reducer, expansion vessel, ....) avoiding their
interception by other elements.
Use a non-return valve or siphon at the cold water inlet with a length of 10 times the pipe diameter to avoid
heat loss due to reverse circulation.
Sizing of the safety relief valve and the exhaust duct
Nominal capacity of
the puffer tank
Maximum heating
output
Minimum safety
relief valve size
Minimum dimension
of the input-output
connection
< 200 litres
75 kW
DN 15
1/2" - 3/4"
200 - 1000 litres
150 kW
DN 20
3/4" - 1"
1000 - 5000 litres
250 kW
DN 25
1" - 1" 1/4
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It is recommended to install air vents to prevent air accumulation.
The installation of automatic filling valves in closed primary heating circuits is not recommended, as it may
lead to re-oxygenation in the system. In the case of combined systems, potential oxygen supply parts of the
system must be isolated from the primary circuit or materials must be used to prevent oxygen supply.
It is obligatory to install a water meter in the primary closed heating circuits to check that there are no
renewals above the values allowed by the standard.
Only original manufacturer's components may be used as spare parts.
This is an indicative layout. It is never a substitute for an expert's project.
7. Filling
Make sure that the hoses and couplings of the system are watertight.
Check all connections of the accumulator for tightness and closure. All connections that are not to be used
must be properly plugged.
Proceed with the flushing of the pipelines according to DIN 1988.
Fill the puffer tank and drain it.
Fill the heating circuit according to VDI 2035 standard, Purge and increase the operating pressure. Do not
exceed the maximum operating pressure indicated on the label of the buffer tank.
Check the tightness of the connections at working pressure.
Verify the activation pressure of the safety valve and check its functionality.
Refill the circuits if necessary after purging and check for leaks and operation.
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¡¡ The tanks contain hot water at high temperatures.!!
¡¡ Do not touch the hydraulic connections of accumulators at
high temperatures.!!
8. Maintenance
Maintenance should only be carried out by authorized technical personnel.
Check the cleanliness of filters.
Purge the circuits and check them for leaks.
Check the safety valve's activation pressure and functionality.
Check expansion vessel pre-charge.
Check the working pressure values and pressure fluctuations.
Verify temperatures.
9. Declaration of Conformity
INDUSTRIAS IBAIONDO, S.A., with VAT number A48045199 and address at Plentzia bidea, nº3, 48100
Munguia (Vizcaya), declares that the models contained in this document have been designed and
manufactured in accordance with good technical practice, in accordance with article 4.3 of European
Directive 2014/68/EU on Pressure Equipment.
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GENERAL CHARACTERISTICS AND DIMENSIONS
Note: If the tank is installed horizontally and at the highest point of the system, the venting set with code no.
14500400 must be fitted to the t-sleeve of the tank so that the tank can be vented. Fill with the tap open until no
more air comes out. Once water comes out, close the valve and finish pressurising the installation.
Both covers have a central hole (P - V) and a trim, leaving both sleeves accessible. They are supplied
uncapped.
AR-S SPECIAL PUFFER TANKS FOR FALSE CEILINGS
Model
20 AR-S
30 AR-S
40 AR-S
Model code 30002161 30003161 30004161
Nominal capacity (Litres) 20 30 40
Maximum working pressure (Bar)
6 6 6
Temperature (ºC)
-10 / +100 -10 /+100 -10 / +100
Thermal insulation
PU rigid PU rigid PU
rigid
Insulation thickness (mm)
20 20 20
External finish
embossed
aluminium
embossed aluminium
embossed
aluminium
Legs
No No No
ErP
C C C
Weight (Kg) 7 10 12
Connections
ef/ec:
lateral entrances 2 x 1” G.H 2 x 1” G.H 2 x 1” G.H
rf/ rc:
lateral exits 2 x 1” G.H 2 x 1” G.H 2 x 1” G.H
p ½” G.H. ½” G.H. ½” G.H.
v ½” G.H. ½” G.H. ½” G.H.
t: Auxiliary (purge) ½” G.H. ½” G.H. ½” G.H.
Dimensions (mm)
ØD:
Diameter ext. 250 250 250
L:
Total length 700 1.000 1.230
A 175 175 175
B 520 820 1.050
G 270 270 270
B-A (
Supports ) 345 645 875
Accessories
References
Support kit 19011052
Purge 14500400
false ceiling
installation
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10.Warranty
All IBAIONDO Industries products will be replaced or repaired free of charge in case of manufacturing
defects, during the warranty period stated in the offer or, failing that, in the current catalogues. The general
warranty period is two years, except for those products specifically indicated with a longer period.
The warranty period starts from the date of sale of the product by our customer, with a maximum limit of 12
months, counting from the date of delivery note from IBAIONDO. For this purpose, the invoice or sales
receipt must be provided, showing the identification data of the product claimed (description and serial
number). In case the customer does not provide the invoice with the above-mentioned requirements, the
period shall start to run from the date of delivery by IBAIONDO.
The warranty does not apply if the defect is due to misuse of the product, non-prescribed use, improper
handling, if the maximum pressure and/or temperature values have been exceeded or, in general, if any of
the instructions for commissioning, use or maintenance, included in the documentation provided, have not
been followed.
IBAIONDO is not responsible for direct or indirect damages, caused by breakdown or defect of its products,
and any other claim that could derive from them, unless the law provides it with obligatory character.
If the instructions have been followed, IBAIONDO will either rectify the defect or deliver new products free
of charge. It shall also be entitled to pay the buyer the amount corresponding to the value of the defective or
missing products. Defective products shall be returned, at the request of IBAIONDO, before the delivery of
the new product is verified.
11.Example of installation
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