Riello 7000 ACI 60 PLUS Installation and operating instructions

cod. Doc-0072750 rev. 1 07/20 15
7000 ACI PLUS
EN INSTALLATION, OPERATION AND MAINTENANCE MANUAL

2
RANGE
MODEL CODE
RIELLO 7000 ACI 60 PLUS 20090056
RIELLO 7000 ACI 120 PLUS 20082450
RIELLO 7000 ACI 200 PLUS 20028093
RIELLO 7000 ACI 300 PLUS 20028094
RIELLO 7000 ACI 400 PLUS 20028095
RIELLO 7000 ACI 500 PLUS 20028096
ACCESSORIES
For a complete list of accessories and details of their compatibility,
refer to the Catalogue.
ENGLISH
Dear Customer,
Thank you for choosing a Rbuffer tank. You have purchased
a modern, quality product that is designed to give dependable
and safe service and to provide comfort in the home for many
years to come. Arrange for your Rbuffer tank to be serviced
regularly by an authorised Rservice centre. Their personnel
are specially trained to keep your buffer tank efcient and
cheap to run. Rservice centres also stock any original spare
parts that might be required.
This manual contains important instructions and precautions
that must be observed to ensure the trouble-free installation
and efcient functioning of your Rbuffer tank.
Please accept our renewed thanks for your purchase,
Riello S.p.A.
CONFORMITY
Rbuffer tanks conform to EN standard 10025.
9 This product must only be used for the purpose for which it
is designed and made, as specied by R. Rdeclines
all responsibility, contractual or other, for damage to
property or injury to persons or animals caused by improper
installation, adjustment, maintenance or use.

3
This manual, Code Doc-0072750 - Rev. 1 (07/2015)
comprises 16 pages.
CONTENTS
The following symbols are used in this manual:
9 CAUTION! = Identies actions that require caution and
adequate preparation.
0 STOP! = Identies actions that you MUST NOT do.
This manual, Code
- Rev.
comprises
pages.
GENERAL
1 General Safety Information ......................4
2 Precautions ..................................4
3 Description of the appliance .....................5
4 Identication .................................5
5 System layout.................................6
6 Technical specications .........................6
7 Water circuit..................................7
8 Location of sensors ............................8
9 Overall dimensions and water ttings ..............9
INSTALLER
10 Unpacking the product ........................ 10
11 Handling ................................... 10
12 Wall mounting ................................11
13 Place of installation ............................11
14 Installation in older systems and systems requiring
modernisation ................................11
TECHNICAL ASSISTANCE SERVICE
15 Putting into service ........................... 12
16 Maintenance ................................ 12
17 Clean the buffer tank .......................... 12
18 Recycling and disposal......................... 13
19 Troubleshooting .............................. 13
END USER
20 Start-up.................................... 14
21 Temporary shutdown.......................... 14
22 Preparing for extended periods of disuse........... 14
23 External maintenance ......................... 14

4
GENERAL
GENERAL
1 GENERAL SAFETY INFORMATION
9 Check that the product is complete, undamaged and as
ordered as soon as you receive it. Report any discrepancies
or damage to the Rdealer who sold it.
9 This product must be installed by a legally qualied heating
engineer. On completion of the installation, the installer
must issue the owner with a declaration of conformity
conrming that the installation has been completed to
the highest standards in compliance with the instructions
provided by Rin this instruction manual, and that it
conforms to all applicable laws and standards.
9 This product must only be used for the purpose for which it
is designed and made, as specied by R. Rdeclines
all responsibility, contractual or other, for damage to
property or injury to persons or animals caused by improper
installation, adjustment, maintenance or use.
9 The product must be serviced at least once a year. Servicing
must be arranged in advance with the RTechnical
Assistance Service.
9 All servicing and repairs must be performed by a qualied
heating engineer.
9 If water leaks from the storage cylinder, turn off the water
supply and contact R’s Technical Assistance Service or a
qualied heating engineer immediately.
9 If the product is not going to be used for an extended period
of time, contact the manufacturer’s Technical Assistance
Service to have at least the following operations performed:
−Close the shut-off cocks for the domestic hot water circuit
−Shut down the boiler connected to the storage cylinder
as instructed in its own manual
−Switch the storage cylinder OFF at the control panel (if
tted) and at the mains power switch
−Drain the central heating circuit and domestic hot water
circuit if there is any risk of freezing.
9 This instruction manual is an integral part of the product. It
must be kept safe and must ALWAYS accompany the product,
even if it is sold to another owner or transferred to another
user or to another installation. If you lose this manual, order
a replacement immediately.
9 If the product is destined for use in a solar collector circuit,
anti-freeze (propylene glycol, available separately) must be
mixed with water in a percentage varying from 30% to 50%
as instructed in the installation and maintenance manual
for the Rsolar collectors.
2 PRECAUTIONS
The operation of any appliance that uses electrical power
demands that a number of fundamental safety precautions be
respected. In particular:
0 Never attempt to install the system without using suitable
personal protection equipment and without following all
applicable occupational safety standards.
0 Do not touch the product when barefoot or wet if it has any
electrical accessories installed in it.
0 Never clean or service the storage cylinder without rst
turning the mains power switch OFF to disconnect all
electrical accessories (if tted) from the mains electricity
supply.
0 Never pull, disconnect, or twist any electrical cables coming
from the appliance even if it is disconnected from the mains
electricity supply.
0 Do not expose the storage cylinder to the elements. It is not
designed for use outdoors.
0 Do not allow children or inrm persons to operate the
system unsupervised.
0 Do not dispose of packaging material into the environment,
or leave it within the reach of children, since it can become
a potential hazard. Dispose of packaging material in
compliance with applicable legislation.
General

5
GENERAL
GENERAL
3 DESCRIPTION OF THE APPLIANCE
R7000 ACI PLUS buffer tanks can be used in conjunction with
chiller systems, solar panels, heat pumps and wood burning
boilers but are not designed to produce domestic hot water.
These buffer tanks can be connected in a variety of ways to
maximise exibility in system layout.
The most important design features of the product are:
−special tank design and shape for optimum performance
in terms of stratication, heat exchange and
replenishment time
−the provision of ttings at different heights for high and
low temperature circuits
−CFC and HCFC free polyurethane insulation and an elegant
external casing to reduce heat loss and improve efciency
R7000 ACI PLUS buffer tanks are easy to integrate in systems
in which Rboilers or other products act as auxiliary heat
sources.
4 IDENTIFICATION
R7000 ACI PLUS buffer tanks are identied by:
Mod. 60 - 120
Data plate
It indicates the technical and performance data.
RIELLO S.p.A.
Via Ing.Pilade Riello 7
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
37045 Legnago (VR) - ITALY
PUFFERSPEICHER
Modell
Seriennummer
KodeBaujahr
Stromversorgung
V-Hz
Speicherinhalt
l
067670DE
Erdschluss ist Vorschrift - Obligatory ground connection - Aarding verplicht
W
Stromaufnahme
Max. Betriebsdruck Speicher
bar
Max. Betriebstemperatur Speicher
°C
Wärmeverluste
STORAGE CYLINDER
Model
Serial number
CodeYear
Storage cylinder capacity
Max. working pressure of cylinder
Max. working temperature of cylinder
Heat loss
Electrical consumption
Power supply
VOORRAADVAT
Serienummer
Bouwjaar
Accumulatiecapaciteit
Max. bedrijfsdruk accumulatie
Warmteverliezen
Max. bedrijfstemperatur accumulatie
Elektrische voeding
Opgenomen elektr. vermogen
Seriennummer
Modell Speicherinhalt l
Serial number
Storage capacity
Model
bar
Max. working pressure of cylinder
Max. Betriebsdruck Speicher
Max. bedrijfsdruk accumulatie
Accumulatiecapaciteit
kWh/24h
Serial number plate
This species the serial number and model.
9 If these plates or any other means of clearly identifying
the product are defaced, removed or lost, proper
installation and servicing may be rendered difcult.
Mod. 200 ÷ 500
Data plate
It indicates the technical and performance data.
RIELLO S.p.A.
Via Ing.Pilade Riello 7
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
37045 Legnago (VR) - ITALY
PUFFERSPEICHER
Modell
Seriennummer
KodeBaujahr
Stromversorgung
V-Hz
Speicherinhalt
l
067670DE
Erdschluss ist Vorschrift - Obligatory ground connection - Aarding verplicht
W
Stromaufnahme
Max. Betriebsdruck Speicher
bar
Max. Betriebstemperatur Speicher
°C
Wärmeverluste
STORAGE CYLINDER
Model
Serial number
CodeYear
Storage cylinder capacity
Max. working pressure of cylinder
Max. working temperature of cylinder
Heat loss
Electrical consumption
Power supply
VOORRAADVAT
Serienummer
Bouwjaar
Accumulatiecapaciteit
Max. bedrijfsdruk accumulatie
Warmteverliezen
Max. bedrijfstemperatur accumulatie
Elektrische voeding
Opgenomen elektr. vermogen
Seriennummer
Modell Speicherinhalt l
Serial number
Storage capacity
Model
bar
Max. working pressure of cylinder
Max. Betriebsdruck Speicher
Max. bedrijfsdruk accumulatie
Accumulatiecapaciteit
kWh/24h
Serial number plate
This species the serial number and model.
9 If these plates or any other means of clearly identifying
the product are defaced, removed or lost, proper
installation and servicing may be rendered difcult.

6
GENERAL
GENERAL
5 SYSTEM LAYOUT
Mod. 60 ÷ 400 Mod. 500
MI
MI
MI
MC
MC
MC
RI RI RC
2
2
4
3
3
4
3
3
SC
SC
RC
1
1
1 Vent
2 Fitting for electrical heating element
3 Temperature sensor sockets
4 Temperature gauge socket
MI Central heating ow
MC Outlet from boiler
RI Central heating return
RC Return to boiler
SC Drain
6 TECHNICAL SPECIFICATIONS
DESCRIPTION 7000 ACI PLUS
60 120 200 300 400 500
Type of buffer tank Non vitried
Tank layout Vertical
Diameter with insulation 400 500 550 600 700 700 mm
Height with insulation 935 1095 1395 1560 1540 1840 mm
Insulation thickness 50 mm
Maximum operating pressure 6bar
Maximum operating temperature 99 °C
Net weight with insulation 25 35 45 55 95 100 kg
Useful volume 57 123 203 277 390 473 l
Dispersion 34 50 68 82 105 129 W
0,816 1,2 1,632 1,968 2,52 3,096 kWh/24h
Insulation class B B C C C D
Insulation type Foamed hard PU

7
GENERAL
GENERAL
7 WATER CIRCUIT
R7000 ACI PLUS buffer tanks can be connected even to previously installed hot water sources, provided care is taken to ensure
correct water ow directions.
TYPICAL WATER SYSTEM SCHEMATIC
5
6
7
1
1
1
11
1
143
1
9
9
10
9
RI
MI MI
13
11
6
14
8
16
1
9
1
1RI 1
9
12
13
11
6
1 1
12
15
2
1
1 Isolating valve
2 Electrical heating element
3 Safety valve
4 Automatic bleed valve
5 Return probe
6 Central heating system pump
7 Expansion vessel
8 Outdoor sensor
9 Drain
10 Condensate outlet
11 Mixer valve
12 Flow temperature sensor
13 Non-return valve
14 Controller RTECH
15 Buffer tank R7000 ACI PLUS
16 Heat pump RHP AQ (*)
MI Central heating ow
RI Central heating return
(*) Only in heating mode
Note! The above schematic is purely indicative.
9 Safety valves must be connected to a suitable collection and drain system. The manufacturer declines all responsibility for
damage caused by water escaping from safety valves.
9 The choice of system components and the method of their installation are left up to the heating engineer installing the system.
Installers must use their expertise to ensure proper installation and functioning in conformity to all applicable legislation.
9 Circuits lled with anti-freeze must be tted with water disconnectors.

8
GENERAL
GENERAL
8 LOCATION OF SENSORS
R7000 ACI PLUS buffer tanks incorporate sockets for temperature control sensors.
9 The actual positioning of sensors depends on what components, water connections and control device are installed.
9 The installer is responsible for making all necessary connections to the boiler and solar collectors. Installers must use their
expertise to ensure proper installation and functioning in compliance with all applicable legislation.
9 Joins between temperature sensor cables and control panel extension cables must be soldered and protected by sheaths or
other forms of electrical insulation.

9
GENERAL
GENERAL
9 OVERALL DIMENSIONS AND WATER FITTINGS
A
B
C
D
E
A
B
C
D
E
F
21 21
MC
MC
RC
MC
RC
MI
RI
SC
MI
MI
RI
SC
4 4
3
3
3
3
3
3
DESCRIPTION 7000 ACI PLUS
60 120 200 300 400 500
1 Polyurethane insulation 50 mm
2 Vent valve tting 1" 1"1/4 Ø
3 Sensor sockets 1/2" F Ø
4 Fitting for electrical heating element (not
supplied)
1 1/2” F Ø
MI CH ow 1"1/4 F 1"1/4 F 1 1/2” F 2" F 2"1/2 F 2"1/2 F Ø
RI CH return 1"1/4 F 1"1/4 F 1 1/2” F 2" F 2"1/2 F 2"1/2 F Ø
SC Drain 1/2" F 1/2" F 1/2" F 3/4" F 3/4" F 3/4" F Ø
RC Return to boiler 1"1/4 F 1"1/4 F 1 1/2” F 2" F 2"1/2 F 2"1/2 F Ø
MC Outlet from boiler 1"1/4 F 1"1/4 F 1 1/2” F 2" F 2"1/2 F 2"1/2 F Ø
A100 100 105 120 135 135 mm
B180 185 215 235 240 240 mm
C485 560 705 785 775 925 mm
D785 935 1200 1340 1310 1610 mm
E530 605 750 830 820 970 mm
F935 1095 1395 1560 1540 1840 mm
9 We recommend that you install isolating valves in the outlet and return lines.
9 Check the efciency of the seals when lling/relling the storage cylinder.

10
INSTALLER
INSTALLER
10 UNPACKING THE PRODUCT
R7000 ACI PLUS buffer tanks are delivered in a single package,
protected by a plastic bag and secured to a wooden pallet.
The following items are delivered in a plastic bag inside the
packaging:
−Instruction manual
−Warranty certicate and barcode label
−Spare parts catalogue
−Hydraulic test certicate
−3 adjustable feet (Mod. 60 - 120)
−2 wall mounting brackets (Mod. 60 - 120)
A
B
H
7000 ACI PLUS A B H
60 600 600 1050
120 600 600 1210
200 600 600 1510
300 600 600 1670
400 700 700 1650
500 700 700 1950
11 HANDLING
Once you have removed the outer packaging, proceed as follows
to unpack and handle the buffer tank.
Only for models 7000 ACI PLUS 60-120
Adjust the feet to ensure that the storage cylinder is perfectly
level.
9 Wear suitable personal protective equipment and use
suitable safety devices.
0 Do not dispose of packaging material into the environment,
or leave it within the reach of children, since it can become
a potential hazard. Dispose of packaging material in
compliance with applicable legislation.
Installer

11
INSTALLER
INSTALLER
12 WALL MOUNTING
(Only for models 7000 ACI PLUS 60-120)
−Mark the xing points on the wall using the brackets to
check the distances between the holes
−Drill the wall
−Insert expansion plugs of a type and size suitable for the
weight of the product when full and suitable for the type
of wall
−Fix the 2 brackets to the buffer tank with the M8 bolts
provided.
−Hang the appliance over the anchor points provided.
9 The operations of lifting and positioning on the wall must
be performed by qualied personnel using equipment that
is suitable for the weight involved and in conformity to all
applicable safety standards in the country of installation.
9 Before commencing installation, identify the best position
for the product on the basis of the minimum clearances
needed around it.
9 The product must only be installed vertically.
9 Make sure that the selected section of wall is able to support
the weight of the product when full and does not hide load
bearing elements, water pipes or electrical cables.
9 Make sure that the expansion plugs used are able to support
the weight of the product when full.
13 PLACE OF INSTALLATION
R7000 ACI PLUS buffer tanks can be installed in any room
where there is no specic requirement for an electrical
protection rating higher than IP X0D.
≥ 0,4 m
≥ 0,6 m
≥ 0,3 m
≥ 0,4 m
9 Respect the minimum specied installation distances to
ensure correct installation and access for maintenance.
14 INSTALLATION IN OLDER SYSTEMS AND SYSTEMS
REQUIRING MODERNISATION
When installing R7000 ACI PLUS buffer tanks in old systems or
systems requiring modernisation, always perform the following
checks.
−Make sure that the system is tted with safety and
control devices in accordance with applicable legislation
and standards
−Make sure that the central heating circuit has been
ushed out to remove all sludge and lime scale, and has
been vented and seal tested
−Make sure that a suitable water treatment system is
installed if the quality of the supply/recirculation water
so demands (refer to the reference values listed in the
table alongside).
REFERENCE VALUES
pH 6-8
Electrical conductivity less than 200 μS/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 35°F
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm

12
TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
15 PUTTING INTO SERVICE
It is essential to perform the following checks before starting up
or testing the functioning of the storage cylinder. In particular,
check that:
−All the connections and pipes are watertight and the
system has been lled and bled correctly
−Any water connections to a boiler or solar collectors have
been made correctly
−Any solar heating circuit has been correctly ushed out
and lled with water-glycol mix, and all air has been
bled out of the circuit
−The electrical connections of all accessories have been
made correctly
−Shut down the water heating system connected to the
storage cylinder as instructed in its own manual.
Once the system has been started up, perform the following
checks.
−Make sure that all pumps are free and rotate in the right
direction
−Make sure that all circuits have been bled.
−Turn the main power switch OFF and make sure that the
water heating system shuts down completely.
Provided the above checks have been completed satisfactorily,
restart the system and verify its performance.
16 MAINTENANCE
Scheduled maintenance is essential for the safety, efciency and
long working life of your buffer tank. Proper maintenance also
reduces energy consumption and ensures reliability over time.
Have your buffer tank serviced either by the manufacturer’s
Technical Assistance Service or by a qualied heating engineer
at least once a year.
Perform the following operations before beginning any
maintenance:
−Switch the electricity supply to all the devices in the buffer
tank’s water circuit and to any associated boiler OFF at
the main switch and at the control panel (if present)
−Close the water shut-off cocks
−Drain the buffer tank.
17 CLEAN THE BUFFER TANK
EXTERNAL CLEANING
Clean the outside of the buffer tank’s insulation with a soft cloth
damped in soapy water. To remove stubborn marks, use a cloth
damped in a 50% mix of water and denatured alcohol or a
suitable cleaning product. Dry the buffer tank after cleaning it.
0 Do not use abrasive products, petrol or triethylene.
Technical Assistance Service

13
TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
18 RECYCLING AND DISPOSAL
At the end of its useful working life, do not abandon the buffer tank in the environment, but dispose of it through the proper
channels in accordance with applicable legislation.
19 TROUBLESHOOTING
FAULT CAUSE SOLUTION
The buffer tank functions incorrectly or
irregularly
Flow rate too high
−Fit a pressure limiter
−Fit a ow reducer
There are blockages or deposits in the
buffer tank −Check and clean as necessary
Filling pump not functioning −Check the pump
The water temperature from the boiler is
too low −Check the temperature setting
There is air in the primary circuit −Bleed the circuit
The safety valve is not functioning
correctly The safety valve is blocked or faulty −Clean or change the valve
Water ows out of the safety valve
Valve faulty −Replace the valve
Circuit pressure too high −Install a suitable pressure reducing
device

14
END USER
END USER
END USER INSTRUCTIONS
Refer to the GENERAL SAFETY INFORMATION and PRECAUTIONS section for safety-related information.
20 START-UP
The buffer tank must be put into service for the rst time by
personnel from the manufacturer’s Technical Assistance Service.
Under certain circumstances, such as after long periods of
disuse, the user may need to re-start it without involving the
Technical Assistance Service. Before doing so, perform the
following checks and operations.
−Check that the supply cocks in the domestic water circuit
are all open
−Switch the electricity supply ON at the mains power
switch and at control panel switch (if tted).
21 TEMPORARY SHUTDOWN
To reduce impact on the environment and save energy, before
leaving for the weekend or a short break, etc., provided outdoor
temperatures will remain above ZERO, simply adjust the buffer
tank’s temperature control device to its minimum setting.
9 If outdoor temperature may drop below ZERO (risk of
freezing) perform the operations described in the “Preparing
for extended periods of disuse” section.
22 PREPARING FOR EXTENDED PERIODS OF DISUSE
If the buffer tank is not going to be used for an extended period
of time, ask the manufacturer’s Technical Assistance Service to
make the system safe.
23 EXTERNAL MAINTENANCE
Clean the cover, painted and plastic parts with a cloth damped
in soap and water. To remove stubborn marks, use a cloth
damped in a 50% mix of water and denatured alcohol or a
suitable cleaning product.
9 Do not use fuels, sponges impregnated with abrasive
solutions or powder detergents.
End user

15
END USER
END USER

The manufacturer strives to continuously improve all products. Appearance, dimensions, technical specications, standard equipment
and accessories are therefore liable to modication without notice.