ACV ECO User guide

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Installation, Operating and
Servicing Instructions
ECO 100 / 130 / 160
HL 100 / 130 / 160 / 210 / 240
HLE 100 / 130 / 160 / 210 / 240
ECO - HL - HLE

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WARNING 3
Who should read these instructions 3
Symbols 3
Recommendations 3
Applicable standards 3
Warnings 3
Packing 3
INTRODUCTION 4
Description of the specifications 4
Description of operation 4
TECHNICAL CHARACTERISTICS 5
Operating condition 5
Wiring diagram 5
INSTALLATION INSTRUCTIONS 6
Installation 6
INSTALLATION 7
Dimensions 7
Central heating connections 7
Domestic hot water connection 8
COMMISSIONING 9
Filling the tank 9
Check to be carried out before start-up 9
Setting the thermostat 9
MAINTENANCE 10
Periodic checks by the user 10
Annual service 10
Replacement of the electric heating element of the HLE 10
Emptying 10
SPARE PARTS See at the end of this manual
INDEX

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WHO SHOULD READ THESE INSTRUCTIONS
These instructions should be read by:
- the specifying engineer
- the installer
- the user
- the service engineer
SYMBOLS
The following symbols are used in this manual:
• It is important to switch the tank OFF before carrying out
any work.
• There are no user accessible parts inside the tank casing.
APPLICABLE STANDARDS
The appliances carry the CE mark in accordance with the
standards in force in the various countries.
WARNINGS
This documentation is part of the information delivered with the
appliance and must be given to the user and stored in a safe
place!
An approved installer must carry out the assembly, commissioning,
maintenance and repair of the system, in accordance with current
standards in force.
ACV shall not accept any responsibility for damage caused by non-
compliant location of the system or by use of the parts or
connections not approved by ACV for this application.
The manufacturer reserves the right to change the
technical characteristics and specification of its
products without notice.
The availability of some versions and their accessories is
market dependant.
PACKING
Units are shipped ready to install, tested and packaged in a car-
board box.
Contents of the package
• One hot water tank.
• One multilingual technical instruction manual.
• One wall-mounting kit with support and one flow diverter.
WARNINGS
RECOMMENDATIONS
• Please, read carefully this manual before installing and
commissioning the tank.
• It is prohibited to carry out any modifications to the inside of
the appliance without the manufacturer’s prior and written
agreement.
• The product must be installed and serviced by trained
engineers, in compliance with current standards.
• The installation must comply with the instructions in this
manual and with the codes and standards governing systems
for the production of hot water.
• Any failure to follow instructions relating to tests and test
procedures may result in personal injury or risks of pollution.
• To guarantee safe and correct operation of the appliance, it
is important to have it serviced and maintained every year by
an approved installer or maintenance company.
• In case of anomaly, please call your service engineer.
• The parts may only be replaced by genuine factory parts. You
will find a list of the spare parts and their reference number
ACV to the end of this document.
Danger of burns
Essential instruction for
the safety of persons
and the environment.
Danger of electrocution.
Essential instruction for
the correct operation of
the installation.

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DESCRIPTION OF THE SPECIFICATIONS
“Tank-in-Tank” system
“Tank-in-Tank” is a heat exchanger with a built-in accumulator, made
up of two concentric tanks: the inner tank contains domestic water
to be reheated (secondary) and the outer tank contains the heating
fluid (primary) which circulates between the two tanks and transfers
its heat to the domestic water.
Hot water exchanger accumulator
The inner tank is the heart of the tank: it is subject to the
aggressiveness of the supply water, to high pressures and to
variations in temperature. This tank is made of solid chrome-
nickel stainless steel (stainless steel 304 or duplex), fully welded
under argon protection using the Tungsten Inert Gas (T.I.G.)
technique.
Before assembly, the convex bottoms are pickled and passivated in
order to improve the tank’s lifespan and in particular its resistance to
corrosion. The shell is corrugated all the way up using an exclusive
manufacturing process. This design gives considerable resistance to
pressure and limits the adherence of lime scale by allowing the tank
to expand and contract.
Outer tank
The outer tank containing water from the primary circuit arriving
from the boiler, is made of carbon steel STW 22.
Thermal Insulation
Soft polyurethane foam - 30 mm thickness.
Lining
Exterior of casing vinyl coated and polypropylene cap.
Electric heating element in HLE
The HLE tank is equipped with one 2200 W heating element
controlled by the thermostat of the HLE.
Description
1. Air valve
2. Steel STW 22 outer tank
3. Domestic hot water outlet
4. Pocket containing the control thermostat
5. Electric heating element 2200 W [HLE only]
6. Insulating foam
7. Polypropylene cap
8. Polyurethane foam insulation
9. Stainless steel (304 or Duplex) inner tank
10. Domestic water return
11. Outlet and return pipes for the heating fluid
12. Domestic cold water inlet
INTRODUCTION
DESCRIPTION OF OPERATION
Operating cycle
The thermostat is triggered and starts up the pump which loads the
heating fluid. This fluid circulates around the inside tank and heats
up the domestic water. When the required temperature is reached,
the thermostat stops the loading pump.
Losses when shut down in °C/h
Models Losses in °c/h
ECO 100 / HL 100 / HLE 100 ΔT = 40°C 0,28
ECO 130 / HL 130 / HLE 130 ΔT = 40°C 0,25
ECO 160 / HL 160 / HLE 160 ΔT = 40°C 0,23
HL 210 / HLE 210 ΔT = 40°C 0,21
HL 240 / HLE 240 ΔT = 40°C 0,21
Temperature losses with ambient T° of 20°C
OFF Reheating Running Tepping
Cold Water
Heating fluid
Domestic hot water
4
3
10
1
9
11
8
2
12
6
5
7
7
12
10
1
9
11
8
2
3
7
7

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TECHNICAL CHARACTERISTICS
Tank characteristics ECO
100
ECO
130
ECO
160
HL
100
HL
130
HL
160
HL
210
HL
240
HLE
100
HLE
130
HLE
160
HLE
210
HLE
240
Total capacity L 105 130 161 105 130 161 203 242 105 130 161 203 242
Primary capacity L 30 31 35 30 31 35 39 42 30 31 35 39 42
Primary fluid flow rate L/h 2100 2600 3500 2100 2600 3500 4200 5500 2100 2600 3500 4200 5500
Primary pressure drop mbar 17 22 37 17 22 37 45 51 17 22 37 45 51
Heating surface m21,03 1,26 1,54 1,03 1,26 1,54 1,94 2,29 1,03 1,26 1,54 1,94 2,29
Tank performances ECO 100
ECO
130
ECO
160
HL
100
HL
130
HL
160
HL
210
HL
240
HLE
100
HLE
130
HLE
160
HLE
210
HLE
240
Peak flow at 40°C L/10’ 236 321 406 236 321 406 547 700 236 321 406 547 700
Peak flow at 60°C L/10’ 117 161 209 117 161 209 272 337 117 161 209 272 337
Peak flow at 40°C L/60’ 784 1063 1349 784 1063 1349 1820 2319 784 1063 1349 1820 2319
Peak flow at 60°C L/60’ 384 549 689 384 549 689 913 1165 384 549 689 913 1165
Constant flow at 40°C L/h 658 890 1132 658 890 1132 1527 1943 658 890 1132 1527 1943
Constant flow at 60°C L/h 320 465 576 320 465 576 769 994 320 465 576 769 994
Pre-heating time minutes 24 22 22 24 22 22 20 20 24 22 22 20 20
Coefficient NL 1,0 2,1 3,0 1,0 2,1 3,0 5,2 11,8 1,0 2,1 3,0 5,2 11,8
Powerdrawn kW23313923313953682331395368
Heating time with the 2,2 kW
heating element, from 10 to
60°C
— — — — — — — — 2 h 43’ 3 h 27’ 4 h 20’ 5 h 37’ 6 h 37’
Running conditions: 85°C Water intake T°: 10°C
OPERATING CONDITION
Maximum service pressure [tank filled with water]
- Heating circuit: 3 bar
- DHW circuit: 10 bar
Test pressure [tank filled with water]
- Heating circuit: 4,5 bar
- DHW circuit: 13 bar
WIRING DIAGRAM
Operating temperature
- Maximum temperature: 90°C
Water quality
• Chlorides: < 150 mg/L [304 Stainless steel]
< 2000 mg/L [Duplex]
• 6 ≤ph ≤8
c
1
2
NL1
L1 N
2
1
7
2
1
2
3
4
5
6
1
2
3
4
5
6
c
1
2c
1
23
4
6
5
HL
HL
E
Br
Y/Gr
B
BrBr
Y/Gr
B
B
Br
Y/Gr
B
Br
B
BrBrWW
Y/Gr
BBB
B
G
B
R
G
Bk
Or
R
R
BBr
R
V
Br
Or
7
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
R. Red
V. V i ol e t
W. W hi t e
Y/ G r. Ye l l o w/ G r e e n
1. 230 Volt connection cord
2. Control thermostat [60/90°C]
3. Manual reset high limit thermostat [103°C max.]
4. Summer/Winter switch
5. Domestic hot water priority relay
6. Electric heating element
7. Load pump [in option]

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INSTALLATION INSTRUCTIONS
INSTALLATION
This hot water tank should not be installed where it will be
exposed to outside weather conditions.
Choose the most appropriate location according to the position
of the boiler and the proximity of the domestic hot water distri-
bution system, in order to reduce heat losses and minimise the
pressure drops.
It may be installed either on the floor or on a wall using the
fixtures supplied, depending of the model.
Horizontal wall hung position with the domestic water connection
on the left side:
1. Mount the tank on the wall, using the supplied brackets.
2. Move if necessary the long PVCC dip tube in lower domestic
connection (see diagram below).
3. Install the flow diverter into the domestic hot-water connection.
ECO
HLE
HL
Horizontal wall hung position with the domestic water connection
on the right side:
1. Mount the tank on the wall, using the supplied brackets.
2. Move if necessary the long PVCC dip tube in lower domestic
connection (see diagram below).
3. Install the flow diverter into the domestic hot-water connection.
EC
O
HLE
HL
Floor mounting :
Only for HL units.
1. Connect the cold water inlet to the tube with the long PVCC dip
tube (see diagram below).
2. This configuration does not require the plastic flow diverter.
HL HLE
Vertical wall hung position with the domestic water connection on
the bottom side:
1. Mount the tank on the wall, using the supplied brackets.
2. Install the flow diverter into the domestic cold-water connection
(see diagram below).
ECO
HL / HLE
The HLE models must be assembled with the heating
element to the bottom (DHW pipes to the bottom).
In horizontal configuration, the peak output and the
first hour continuous output will be reduced. In this
case, we recommend to oversize the tank.

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INSTALLATION
DIMENSIONS ECO
100
ECO
130
ECO
160
HL
100
HL
130
HL
160
HL
210
HL
240
HLE
100
HLE
130
HLE
160
HLE
210
HLE
240
A mm 882 1042 1242 847 1007 1207 1479 1726 847 1007 1207 1479 1726
B mm 629 789 989 629 789 989 1261 1508 629 789 989 1261 1508
C mm 365 525 725 365 525 725 997 1244 365 525 725 997 1244
Weight empty [kg] 40 47 55 40 47 55 65 75 40 47 55 65 75
517
555
A
B
264
C
360
325
296 146
514
552
A
B
264
C
360
325
295 145
HL / HLEECO
CENTRAL HEATING CONNECTIONS
PIPE DIMENSIONS
Models Central heating
ECO / HL / HLE 100 L 1”1/4
ECO / HL / HLE 130 L 1”1/4
ECO / HL / HLE 160 L 1”1/4
HL / HLE 210 L 1”1/4
HL / HLE 240 L 1”1/4
1. System filling valve
2. Safety valve calibrated to 3 bar
3. Expansion vessel
4. Drain cock
5. Isolation valve, heating system
6. Room thermostat
7. Optional boiler control [BC 01 or BC 03]
8. Boiler pump
9. Heating pump
10. 3-ways motorized mixing valve
11. Air valve of the primary circuit
5
5 5
1
89
4
2
3
6
7
5
11
Single tank with primary pump.
Horizontally mounted wall hung tank. (Excepted for the HLE)
5
5
5 5
1
8
10
4
2
3
6
7
Single tank with three ways motorized mixing valve.
Vertically mounted wall hung tank.
5
5
5 5
1
89
4
2
3
6
7
Single tank with primary pump.
Floor mounted tank. (HL only)
HLE tank used as electic domestic
hot water heater only
5
1
2
3
This connection
to be plugged.
Do not power the heating element ij the
oustide tank is not filled and drained.

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INSTALLATION
DOMESTIC HOT WATER CONNECTIONS
PIPE DIMENSIONS
Models Cold / hot water
connections Auxiliary connexion
ECO / HL / HLE 100 L Ø 3/4” [M] Ø 3/4” [F]
ECO / HL / HLE 130 L Ø 3/4” [M] Ø 3/4” [F]
ECO / HL / HLE 160 L Ø 3/4” [M] Ø 3/4” [F]
HL / HLE 210 L Ø 3/4” [M] Ø 3/4” [F]
HL / HLE 240 L Ø 3/4” [M] Ø 3/4” [F]
1. Isolating valve
2. Pressure reducer
3. Non-return valve
4. Expansion tank
5. Safety valve
6. Drain cock
7. A i r v e n t
8. Thermostatic mixing valve
9. Circulation pump
10. Drawoff tap
11. Earth connection
The installation of a domestic safety unit is compulsory.
In order to avoid water dropping on the tank, the
domestic safety unit should not be placed directely
above the tank.
The third domestic water outlet can be used as a
return from the domestic hot water circulation loop.
Mains water kits could be in some countries due to
approval regulations.
To avoid all risk of corrosion connect the sanitary tank
directly in the earth.
Recommendations
• The pipe feeding the tank with cold water must be fitted
with a safety unit comprising at least the following:
- An isolating valve [1]
- a non-return valve [3]
- a safety valve [4]: (set to < 10 bar)
- a sanitary expansion vessel of appropriate dimensions.
• When the operating pressure exceeds 6 bar a pressure
reducer [2] must be installed before the safety unit.
• Union fittings are recommended for easy removal of the
connections. Ideally the “dielectric” version is preferable
in order to protect the connections against corrosion in
the presence of dissimilar metals such as copper and
galvanised steel.
• The installation of an expansion vessel avoids safety valve
runoff (loss of water).
• Domestic hot water expansion vessel capacity:
5 Litres: for the following models: 100
8 Litres: for the following models: 130 / 160
12 Litres: for the following models: 210 / 240
Please see the technical instruction manual of the
expansion vessel’s manufacturer for further details.
2
7
5
1
1
4
10
6
1
3911
3 3
1
8
11
2
7
5
6
1
1
4
8
10
1
3911
3 3
1
11
Domestic hot water kit
A. Thermostatic mixing valve
B. Mixed water outlet
C. Cold water inlet
D. Drainage connection
E. Expansion vessel connection
S. Safety unit
TH. Outlet hot water tank
TC. Inlet cold water tank
Wall mounting
A
BEC
S
D
TCTH
Floor mounting
A
BE
C
TCTH
S
D
Floor
mounting
Wall
mounting

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COMMISSIONING
Before pressurising the central heating tank (primary)
you should first pressurise the domestic hot water
tank (secondary).
Both the domestic hot water tank and the central
heating tank must be filled before using the tank.
FILLING THE TANK
Domestic hot water tank
1. Close the drain cock [6] of the DHW circuit.
2. Open the isolating valve [1] of the DHW circuit for the filling.
3. Bleed the air in the circuit by turning on a nearby hot water
tap [10] Fill the tank until the flow rate stabilises.
4. Turn off the hot water tap [10].
2
7
5
1
1
4
10
6
1
3911
3 3
1
8
11
5
5
5 5
1
8
10
4
2
3
6
7
Central heating tank
1. Close the drain cock [4] on the tank’s primary circuit.
2. Open the isolation valves [5] on the central heating circuit
connected to the boiler.
3. Bleed the air in the circuit by opening the air vent located on
the upper part of the tank.
4. Follow the instructions supplied with the boiler for filling.
5. When the tank is full and the air has been removed, the
bleed valve should be closed.
Ensure that the bleed valve is properly sealed.
6. If any antifreeze is needed in the primary circuit it mus be
compatible with Public hygiene rules and not be toxic.
A food-type Propylene Glycol is recommended.
Consult the manufacturer to ensure that the antifreeze is
compatible with the tank’s construction materials.
Never use car antifreeze or undiluted antifreeze.
This can cause serious injury, death or damage to the
premises.
CHECKS TO BE CARRIED OUT BEFORE START-UP
• Safety valves (domestic hot water) and (central heating)
correctly installed and discharge connected to the drains.
• Domestic hot water tank and primary circuit filled with
water.
• Air bleed correctly carried out on both circuits.
• Air valve sealed.
• Both hot and cold water pipes correctly connected to the
tank’s hot water circuit.
• Heating feed and return correctly connected to the tank.
• The electrical cabling is correct.
• The tank’s thermostat is set according to the instructions
shown in § “Setting the thermostat”.
• Connections checked and free of leaks.
SETTING THE THERMOSTAT
Factory settings
The thermostat of the tank is factory preset to the minimum
recommended by the standards, over a range of settings from
60 to 90°C.
To increase the temperature: turn the button clockwise.
To reduce the temperature: turn the button anticlockwise.
When adjusting the tank’s thermostat, make sure that the
boiler temperature is set to a value at last 10°C higher than
tank’s thermostat.
Recommendations
There is a risk that bacteria including “Legionella
pneumophila” may develop if a minimum temperature
of 60°C is not maintained both in storage and in the
hot water distribution network.
There is a risk of scalding from hot water!
ACV recommends the use of a thermostatic mixing
valve set to provide water at 60 °C or less.
• The water heated to wash clothes, dishes and for other
purposes can burn and cause serious injury.
• Children, the elderly, the sick or the disabled are the most at
risk from burns due to very hot water. Never leave them on
their own in a bath or under the shower. Never allow young
children to turn on hot water taps or fill their own baths.
• Set the water temperature appropriately according to the
intended use and plumbing codes.
When repeatedly drawing small amounts of hot water,
a “stratification” effect may develop in the tank.
The upper layer of hot water may then reach very high
temperatures. A thermostatic mixing valve will stop
water at excessivly high temperatures reaching the
outlets.

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MAINTENANCE
Domestic hot water tank
To empty the domestic hot water tank:
1. Switch off the electrical power supply to the tank.
2. Close the isolation valve [1].
3. Open the drain cock [6] and the air vent [7].
4. Allow the water to flow out into the drain.
5. After emptying, return the valves to their initial positions.
In order to allow emptying the valve [6]must be located
at the lowest point on the tank.
2
7
5
1
1
4
10
6
1
3911
3 3
1
8
11
5
5
5 5
1
8
10
4
2
3
6
7
Central heating tank
To empty off the primary circuit:
1. Switch off the electrical power supply to the tank.
2. Close the shut-off valves [5] on the primary circuit.
3. Connect a hose to the drain valve [4].
4. Open the drain valve [4] and drain the hot water off.
5. To speed up the process, open the air vent located on the
upper part of the tank.
6. When the emptying is finished, close the drain cock again
then screw the air valve up again.
PERIODIC CHECKS BY THE USER
• Check the pressure of the boiler’s pressure gauge: it should
be between 0.5 and 1.5 bar.
• Carry out a monthly visual inspection of the valves,
connections and accessories in order to detect any leaks
or malfunctions.
• Periodically check the air valve located on the upper part of
the tank to make sure that it is not leaking.
• If you notice anything unusual, contact a technician or your
heating engineer.
ANNUAL SERVICE
The annual service, carried out by a technician, must include
the following:
• Checking the air valve:
The air bleed can lead to water being added to the system.
Check the pressure on the boiler’s pressure gauge.
• Manually activate the domestic hot water safety valve once
a year. This operation will lead to a discharge of hot water.
Before drawing any hot water through the safety unit,
make sure that the discharge goes directly to the drain
in order to avoid any risk of burning or damage.
• The discharge pipe should be open to the atmosphere.
• If the safety unit occasionally “drips” this may be due to an
expansion problem or to clogging of the valve.
• Follow the circulator’s maintenance instructions.
• Check that the valves, cocks, controllers and any electrical
accessories installed are working properly (see the
manufacturer’s instructions if necessary).
REPLACEMENT OF THE ELECTRIC HEATING
ELEMENT FOR THE HLE
• Switch off and disconnect the mains power supply to the
appliance.
• Drain the primary tank.
EMPTYING
Recommendations
Empty the tank if it is to be switched off for the winter
and there is a risk of frost conditions exposure.
If the central heating water (primary circuit) contains
any antifreeze, only the domestic hot water should be
drained.
Before draining off the domestic hot water, insulate
the tank to bring the central heating pressure (primary
circuit) down to 1 bar, in order to protect the tank
against a risk of collapsing.
If the central heating circuit does not contain any anti-
freeze, both the central heating and hot water circuits
should be drained.