ACV HRs 321 Manual

661Y1200 • C
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INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
HRs 321 - 601 - 800 - 1000
JUMBO 800 - 1000

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TABLE OF CONTENTS
GENERAL RECOMMENDATIONS..............................................................4
USER'S GUIDE.............................................................................................5
Thermostat .................................................................................................................................................................. 5
APPLIANCE DESCRIPTION........................................................................6
Models - Types HRs 321 – 601 -800 - 1000 / JUMBO 800 - 1000................................................................ 6
TECHNICAL CHARACTERISTICS..............................................................8
Dimensions.................................................................................................................................................................. 8
Electrical Characteristics (Option for HRs 321 - 601 - 800 - 1000).................................11
Hydraulic Characteristics................................................................................................................................11
Performance .............................................................................................................................................................12
Maximum Operating Conditions.............................................................................................................12
INSTALLATION ........................................................................................13
Packing Contents..................................................................................................................................................13
Tools ................................................................................................................................................................................13
Safety Instructions...............................................................................................................................................14
Preparation of the Tank (HRS type with soft casing)...............................................................16
Preparation of the Tank (Jumbo type with metal casing)...................................................18
Connection................................................................................................................................................................20
Parallel Tank Assembly (Typical - 3 tanks)........................................................................................22
Connection Kits (option) ................................................................................................................................22

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TABLE OF CONTENTS
STARTING UP ...........................................................................................23
Safety Instructions to Fill the Tank.........................................................................................................23
Filling ..............................................................................................................................................................................24
Checks before Starting up ............................................................................................................................26
MAINTENANCE........................................................................................27
Periodic Checks by the User........................................................................................................................27
Annual Maintenance..........................................................................................................................................27
Draining........................................................................................................................................................................28
Bringing back into Service after Maintenance.............................................................................28

NOTES
• This manual contains important information with respect to the installation, the starting up
and the maintenance of the hot water tank.
• This manual must be provided to the user, who will read it carefully and keep it in a safe
place.
• The availability of certain models as well as their accessories may vary according to the markets.
• The manufacturer reserves the right to change the technical characteristics and features of
its products without prior notice.
We accept no liability should any damage result from the failure to comply with theinstruc-
tions contained in this technical manual.
Essential instructions forthe safety of persons and the environment
• It is strictly prohibited to bring any modification to the appliance, without
themanufacturer’s prior written approval.
• The appliance must be installed by a qualified installer, in accordance with
applicable regulations.
• The installation must comply with the instructions contained in this manual and
with the regulations applicable to installations.
• Failure to follow the instructions in this manual could result in personal injury or a
risk of environmental pollution.
• The manufacturer declines all liability for any damage caused as a result of
incorrect installation or in the event of the use of appliances or accessories that are
not approved by the manufacturer.
Essential instructions forthecorrect operation oftheinstallation
• In order to ensure that the appliance operates correctly, it is essential to have it
serviced by a certified installer or maintenance contractor every year.
• In case of problem, please contact your installer for advice.
• Faulty parts must only be replaced with genuine parts.
• Our domestic hot water tanks are designed and manufactured exclusively for the
heating and storage of domestic hotwater.
• The domestic hot water heaters must only be heated using hot water in a closed
circuit.
• The part number (N° Art.) and serial number (N° Ser.) of the tank are indicated on
its rating plate and must be provided to ACV in case of warranty claim. Failure to
do so will make the claim void.
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GENERAL RECOMMENDATIONS

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Legend :
1. Thermometer : indicates the domestic hot water (DHW) temperature in the tank.
2. Adjusting knob : allows to dene the DHW preset temperature. It rotates 1/4 turn clockwise to
set the temperature between 60°C and 90°C.
USER'S GUIDE
THERMOSTAT
The thermostat is optional for the HRs type tanks equipped with a soft casing, but is standard for
the JUMBO type tanks with a metal casing.
Wiring Diagram ( Jumbo 800 - 1000)
B. Blue
Br. Brown
Bk. Black
Or. Orange
Y/Gr. Yellow / Green
c1
2
Br
Y/Gr
B
OrOr
Y/Gr
Bk
Bk
N L1
L1 N
tN
PE
L
12

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Legend
1. DHW outlet
2. Manual air bleed valve
3. Cold water inlet
4. Black rigid polypropylene cover
5. Stainless steel dry-well
6. 70 mm soft insulation (open-cell
polyurethane foam)
7. Outer vinyl casing with zip fastener
8. Auxiliary DHW loop
9. Primary circuit inlet
10. Inner stainless steel tank
11. Outer steel (primary) tank
12. Primary circuit outlet
APPLIANCE DESCRIPTION
MODELS  Types HRs 321 – 601 -800 - 1000 / JUMBO 800 - 1000
Indirectly heated storage water tanks, to be installed on the oor, equipped with a large surface
heat exchanger and intended for medium and high power installations. Through the use of a
specic kit, these tanks can be set in parallel, allowing the construction of high ow rate assemblies
for any type of commercial, residential or industrial facilities.
HRs 321 - 601
1
2
6
8
9
10
11
12
3
4
5
7

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APPLIANCE DESCRIPTION
HRs/JUMBO 800 - 1000
Legend
1. DHW outlet
2. Auxiliary DHW loop
3. Cold water inlet
4. Primary circuit inlet
5. Inner stainless steel tank
6. Primary circuit outlet
7. Hand hole
8. Stainless steel dry-well
9. Manual bleed valve
10. Outer (primary) steel tank
Jumbo 800 - 1000 with metal casing
11. Thermometer
12. Adjusting knob
13. 120 mm rock wool insulation
(not shown)
14. Metal casing
Tanks shown without insulation
1
4
6
7
9
10
8
2
3
5
11
12
13
14

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TECHNICAL CHARACTERISTICS
DIMENSIONS
Tank dimensions (soft casing) HRs
321 601 800 1000
A= Height mm 1600 1895 1955 2355
B= Ø mm — — 780 780
Cmm 255 255 335 335
Dmm 1285 1585 1585 1985
E= Ø mm 270 270 360 360
F= Ø mm 700 845 920 920
Empty weight Kg 106 201 261 308
A
D
C
B
E
F
E
F
HRs 321 - 601 HRs 800 - 1000

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TECHNICAL CHARACTERISTICS
Tank clearance HRs
321 601 800 1000
D1 (mm) Recommended (1 tank) 1000 1000 1000 1000
Minimum (parallel assy.) 425 425 550 550
D2 (mm)Recommended 1000 1000 1000 1000
Minimum 800 800 800 800
Height (mm) Recommended 250 250 300 300
Minimum 150 180 210 180
D1
H
D2

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TECHNICAL CHARACTERISTICS
Tank dimensions JUMBO
800 1000
A= Height mm 1955 2355
B= Ø mm 780 780
Cmm 335 335
Dmm 1585 1985
E= Ø mm 360 360
Fmm 1020 1020
Empty weight Kg 360 380
Tank clearance
D1 (mm) Recommended (1 tank) 1000 1000
Minimum (parallel assy) 550 550
D2 (mm) Recommended 1000 1000
Minimum 800 800
H(mm) Recommended 300 300
Minimum 210 180
A
D
C
B
E
F
F
D1
H
D2

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TECHNICAL CHARACTERISTICS
HYDRAULIC CHARACTERISTICS
Main characteristics HRsHR
s
/JUMBO
321 601 800 1000
Total capacity L 303 606 800 1000
Primary circuit capacity L 40 161 125 160
Primary circuit connection [F] " 2222
DHW connection [M] " 1 1/2 1 1/2 1 1/2 1 1/2
Auxiliary DHW loop connection [M] " 3/4 3/4 3/4 3/4
Heating surface area m² 2.65 3.58 4.56 5.50
Primary uid ow rate L/h 6900 7200 7500 7800
ELECTRICAL CHARACTERISTICS Option for HRs 321 - 601 - 800 - 1000
Main characteristics HRsHRs / JUMBO
321 601 800 1000
Rated voltage V~ 230/240 230/240 230/240 230/240
Rated frequency Hz 50 50 50 50
Max. power kW 1.3 1.3 1.3 1.3
Max. amp. rating (fuse) A 6666

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TECHNICAL CHARACTERISTICS
PERFORMANCE
DHW performance HRsHR
s
/JUMBO
Operating conditions at 80°C 321 601 800 1000
Peak ow at 40 °C L/10' 922 1345 1881 2265
Peak ow at 45 °C L/10' 790 1153 1612 1941
Peak ow at 60 °C L/10' 504 706 961 1145
Peak ow at 40 °C L/60' 2732 3437 4270 4940
Peak ow at 45 °C L/60' 2342 2946 3660 4234
Peak ow at 60 °C L/60' 1402 1733 2124 2438
Constant ow at 40 °C L/h 2172 2511 2868 3210
Constant ow at 45 °C L/h 1862 2152 2458 2751
Constant ow at 60 °C L/h 1077 1232 1395 1562
Coecient NL 18 34 67 87
Primary heating input power kW 76 88 100 112
Operating temperature : 90°C Water supply temperature : 10°C
MAXIMUM OPERATING CONDITIONS
Maximum Service Pressure [tank full of water]
- Primary circuit :..................................................3 bar
- DHW water circuit : ....................................... 10 bar
Operating Temperature
- Maximum temperature :................................90°C
Supply Pressure (DHW circuit)
- Max. 6 bar without requiring a pressure reducing valve
Water Quality
- Chlorides < 150 mg/L
- 6 ≤ pH ≤ 8
- If the water hardness is > 20°fH, the installation of a water softener is recommended.

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PACKING CONTENTS
All appliances are delivered, tested and packed separately.
For the installation of the casing, refer to "Preparation of the Tank (HRS type with soft casing)",
page 16 and 18
Make sure to place the rating plate on the outer casing of the tank, so that it is easily
accessible and legible.
The manufacturer reserves the right to change the technical characteristics and
features of its products without prior notice.
The availability of certain models as well as their accessories may vary according to
the markets.
INSTALLATION
Jumbo tanks
Box 1 : tank + multilingual Installation,
Operation and Maintenance
Instruction manual + rating plate.
Box 2 : metal casing and a base to be
assembled.
Box 3 : Rolls of 60mm stone wool insulation.
HRS tanks
Box 1 : tank + multilingual Installation,
Operation and Maintenance
Instruction manual + rating plate +
ACV logo sticker.
Box 2 : soft casing + cover + insulation + all
required caps.
TOOLS




SAFETY INSTRUCTIONS
General remark
• Connections (electrical, hydraulic) must be carried out in accordance with
applicable standards and regulations.
• If the water drawing off point is far from the tank, installing an auxiliary DHW loop
can allow to get hot water more quickly at all times.
Essential instructions forthecorrect operation oftheinstallation
• The tank must be installed in a dry and protected area.
• Install the appliance to ensure easy access at all times.
• To avoid any risk of corrosion, connect the stainless steel tank directly to the earth.
• Make sure to install a pressure reducing valve set at 4.5 bar in the DHW circuit if the
supply pressure is higher than 6 bar.
• On the DHW circuit, install an approved safety group, comprised of a safety valve
set at 7 bar, a check valve and a stop valve.
• Make sure that the outlet of the safety unit goes directly to the sewer to avoid any
potential damage.
• Do not install the safety group above the tank to avoid water discharge on to the
tank.
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INSTALLATION

Essential instructions forthe safety of persons and the environment
• Hot water can burn!
In the event of small amounts of hot water repeatedly being drawn off, a
stratification effect can develop in the tank. The upper hot water layer may then
reach very high temperatures.
• ACV recommends using apre-set thermostatic mixing valve in order to provide
hot water at a maximum of 60°C.
• Water heated to wash clothes, dishes and for other uses can cause serious burns.
• In order to avoid exposure to extremely hot water that can cause serious burns,
never leave children, old people, disabled or handicapped people in the bath
orshower alone.
• Never allow young children to turn on the hot water or fill their own bath.
• Adjust the water temperature in accordance with usage and plumbing regulations.
•
The risk of developing bacteria exists, including “Legionella pneumophila”,
ifaminimum temperature of 60°C is not maintained in both the DHW tank andthe
hot water distribution network.
Essential instructions for the electrical safety
• Only an approved installer is authorized to carry out the electrical connections.
• Install a 2-way switch and a fuse or circuit breaker of the recommended rating
outside the appliance, so as to be able to shut power down when servicing the
appliance or before performing any operation on it.
• Shut down external electrical supply of the appliance before performing any
operation on the electrical circuit.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge,
unless supervised or unless they have been given instruction concerning the use
of the appliance by a person responsible for their safety.
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INSTALLATION

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INSTALLATION
PREPARATION OF THE TANK HRS type with soft casing
1
3
2

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INSTALLATION
5
6
4
Install the rating
plate sticker here.
Install the ACV
logo sticker here.

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INSTALLATION
PREPARATION OF THE TANK JUMBO type with metal casing
1 2
3 4
5 6

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INSTALLATION
Make sure to place the rating plate on the outer casing of the tank, so that it is easily
accessible and legible.
Place the control thermostat and
thermometer bulbs in the appropriate
dry-well.
78
9 10

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2 3
4
8
5
9
10
7
6
Cold water
Hot water
CONNECTION
Essential instructions forthe safety of persons and the environment
• Refer to the safety instructions for the installation. Failure to comply with these
instructions can result in damages to the installation, severe injuries or death.
• Hot water can burn! ACV recommends using a pre-set thermostatic mixing valve
in order to provide hot water at a maximum of 60°C.
Essential instructions forthecorrect operation oftheinstallation
• The filling circuit of the DHW tank must be equipped with a safety group,
comprised at least of a stop valve, a check valve, a safety valve set at 7 bar, and
possibly, an expansion vessel of the appropriate size. Make sure that the circuit
between the tank and the safety valve is always open.
• The third DHW tank connection, if any, can be used for the auxiliary DHW loop. If the
connection is not used, replace the protective plug by a brass plug of the appropriate size.
General remarks
• In certain countries the domestic kits must be approved.
• The circuit illustrations are basic principle diagrams only.
CONNECTION TO THE DHW CIRCUIT (Typical floor installation)
Key
1. Filling valve
2. Pressure reducing valve (set at 4.5 bar)
3. Check valve
4. Expansion vessel
5. Safety valve (set at 7 bar)
6. Drain valve
7. Hot water outlet
8. Pressure gauge
9. Grounding
10. Stop valve
11. Thermostatic mixing valve
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INSTALLATION
If there is a risk of low pressure in the
hot water circuit (installation of the
tank on the roof of a building), it is
essential to install a vacuum breaker
device onto the cold water supply.