ACV SL 320 Smart Boiler Instruction Manual

ACV SL 320 Smart Boiler

General Recommendations

NOTES
This manual contains important information concerning the installation, the starting up, and the maintenance of the appliance. This manual must be provided to the user, who will read it carefully and keep it in a safe place.

• We accept no liability should any damage result from the failure to comply with the instructions contained in this technical manual.

Essential recommendations for safety

• It is strictly prohibited to carry out any modifications to the appliance without the manufacturer’s prior written agreement.
• The product must be installed by a qualified engineer, and inapplicable local standards and regulations.
• The installation must comply with the instructions contained in this manual and with the standards and regulations applicable to domestic hot water tanks.
• Failure to comply with 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 specified by the manufacturer.

Essential recommendations for the correct operation of the appliance

• In case of an anomaly, please call your installer for advice.
• Faulty parts may only be replaced by genuine parts.
• Our water heaters are designed and manufactured for the exclusive purpose of heating and storing domestic hot water.
• The domestic water heaters must only be heated using hot water in a closed circuit.

General remarks

• The availability of certain models as well as their accessories may vary according to markets.
• The manufacturer reserves the right to change the technical characteristics and features of its products without prior notice. Please check for an updated version of this manual on the website www.acv.com.
• The part number (P/N) and serial number (S/N) of the appliance are indicated on its rating plate and must be provided to ACV in case of a warranty claim. Failure to do so will make the claim void.
• Despite the strict quality standards that ACV applies to its appliances during production, inspection, and transport, faults may occur. Please immediately notify your approved installer of any faults.

Product Information

PRODUCT FICHE – ENERGY LABELLING

RATING PLATE

Appliance Description

MODELS – SL 320 – 420 – 600

Large-capacity storage water tanks, are to be installed on the floor.

1. Auxiliary connection DHW
2. Domestic cold water inlet
3. Polyurethane foam insulation 50 mm
4. Flow connection [primary circuit]
5. Stainless steel (304) inner tank
6. Return connection [primary circuit]
7. Outer steel tank [primary circuit]
8. Manual air valve
9. Domestic hot water outlet
10. Polypropylene top lid
11. Polypropylene shell
12. Polypropylene bottom lid

Technical Characteristics

DIMENSIONS AND MAIN CHARACTERISTICS

SL

POSITION
The hot water cylinder must be installed in an area that is dry and protected from the elements. Choose the most suitable location according to the position of the boiler and distance to the domestic hot water supply, to reduce temperature and pressure drops within the pipe work.

• The unit should be positioned to allow the replacement, if required, of the dip tube and dry well during servicing.

SL

• According to EN12897:2016

ELECTRICAL CHARACTERISTICS

SL

Wiring diagram

1. Control thermostat [60/80°C]
2. Load pump [in option]
3. Manual reset high limit thermostat [89°C max.]

SL 320 – 420

SL 320 – 420 (UK version) SL 600

• B. Blue
• Bk. Black
• Br. Brown
• G. Grey
• Or. Orange
• W. White
• Y/Gr. Yellow/Green

PERFORMANCE

DHW **performance*|  |  | SL|
---|---|---|---|---
 | 320| 420| 600**
Peak flow at 40 °C| L/10′| 922| 1,195| 1,345
Peak flow at 45 °C| L/10′| 790| 1,012| 1,153
Peak flow at 60 °C| L/10′| 504| 620| 706
Peak flow first hour at 40 °C| L/60′| 2,666| 3,151| 3,437
Peak flow first hour at 45 °C| L/60′| 2,285| 2,608| 2,946
Peak flow first hour at 60 °C| L/60′| 1,368| 1,513| 1,733
Constant flow at 40 °C| L/h| 2,093| 2,536| 2,511
Constant flow at 45 °C| L/h| 1,794| 2,058| 2,152
Constant flow at 60 °C| L/h| 1,037| 1,153| 1,232
Power drawn| kW| 73| 88| 88
Initial heating time| Minutes| 23| 24| 35

Conditions: Primary circuit temp.: 85°C, water supply temp.: 10°C

G3 REQUIREMENTS AND GUIDANCE – UK ONLY

Discharge pipe from safety valves
The Building Regulation G3 requires that any discharge from an unvented system is con-veyed to where it is visible, but will not cause danger to persons in or about the building. The tundish and discharge pipes should be fi tested under the requirements and guidance notes of Building Regulation G3. Please refer to the illustration below and Building Regulation G3 for more information on pipe sizing and component locations. For discharge pipe arrangements not covered by G3 Guidance advice should be sought from your local Building Control Officer.

Main characteristics

• Any discharge pipe connected to the pressure relief devices (Expansion Valve and Temperature/Pressure Relief Valve) must be installed in a continuously downward direction and in frost-free environment.
• Water may drip from the discharge pipe of the pressure relief device.
• This pipe must be left open to the atmosphere.
• The pressure relief device is to be operated regularly to remove lime deposits and to verify that it is not blocked.

Essential recommendations for safety

• The temperature/pressure relief valve should only be replaced by a competent person.
• No control or safety valves should be tampered with or used for any other purpose.
• The discharge pipe should not be blocked or used for any other purpose.
• The tundish should not be located adjacent to any electrical components

The illustration below is an extract of Building Regulation G3. Please refer to the source document for more information.

Installation

SAFETY INSTRUCTIONS

General remarks

• Connections (electrical, hydraulic) must be carried out under applicable standards and regulations.
• If the wadrawing-off point is far from the tank, installing an auxiliary DHW loop can allow t ou et hot water more quickly at all times.

Essential instructions for the correct operation of the system

• 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. Use an adjustable earth clamp (see example below) on one of the DHW connections to connect to the earth. Advised copper wire section: 2.5mm².
• 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 onto the tank.
• The installation of a domestic expansion vessel avoids discharge from the safety valve (loss of water).
• Capacity of domestic water vessels:
• 18 Litres for SL 320
• 24 Litres for SL 420
• 35 Litres for SL 600

Refer to the manufacturer’s technical instructions on the expansion vessel for more details.

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 to provide hot water at a maximum of 60°C.
• Water heated to wash clothes, dishes,s and for other uses can cause serious burns.
• 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 bath.
• Adjust the water temperature by 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 electrical safety

• Only an approved installer is authorized to carry out the electrical connections.
• Make sure that the appliance is connected to the earth.
• Install a 2-way switch and a fuse or circuit breaker of the recommended rating outside the appliance, to be able to shut power down when servicing the appliance or before performing any operation on it.
• Shut down the 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.

PACKING CONTENTS
All appliances are delivered, tested, and packaged separately.

Package

• One SL hot water tank.
• One multilingual Installation, Operation and Maintenance Instructions.
• One energy label

TOOLS

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 system, 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 system

• 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 with 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)

CONNECTION TO THE PRIMARY CIRCUIT (Typical floor installation)

Key

1. Primary circuit filling valve
2. Charging pump
3. Check valve
4. Primary circuit stop valve
5. Expansion vessel
6. Pressure gauge
7. Safety valve
8. Drain valve
9. Stop valve

PARALLEL TANK ASSEMBLY (Typical – 3 tanks)
Recommended assembly for any waste heat recovery system and district heating applications.

• This type of connection reduces the water-heating performance of the system. Make sure to oversize the assembly. A specific connection kit is required to build this type of assembly.

Legend

1. Primary circuit filling valve
2. Safety valve
3. Expansion vessel
4. Drain valve
5. Primary circuit stop valve
6. Room thermostat
7. Boiler control (option)
8. Charging pump
9. Primary circuit pump

CONNECTION KITS (OPTION)
Reference codes : 10800179 – 10800180

Starting Up

SAFETY INSTRUCTIONS TO FILL THE TANK

Essential instructions for the safety of persons and the environment

• The DHW tank must always be filled and pressurized before filling and pressurizing the primary circuit.
• Do not use vehicle antifreeze. This can cause serious injury or death, or damage facilities.
• If antifreeze is needed in the primary circuit, it must comply with Public Hygiene Regulations and must be non-toxic. A food-grade Propylene Glycol is recommended. It must be diluted according to the ratio recommended in the local regulations.
• Consult the manufacturer to determine the compatibility of the antifreeze with the tank’s construction materials.

Essential instructions for the correct operation of the system

• Before bringing the tank into service, check the connections to avoid any risk of leaks during filling.
• Only use drinking water to check that the DHW tank is watertight. The on-site test pressure must not exceed a pressure surge of 8,6 bar.
• Using antifreeze in the primary circuit will lead to a reduction in the heating performance. The higher the concentration of antifreeze in the circuit, the lower the performance.

FILLING

Essential instruction for the correct operation of the system

• The DHW tank must always be filled and pressurized before filling and pressurizing the primary circuit.

FILLING THE DHW TANK (Figure 1)

General remark

• Connect the safety valve outlet to the sewer.

1. To fill the tank, open a hot water tap (2) located at the highest point of the system. It enables to bleed the air from the system.
2. Open the filling valve (1) and the stop valves (3) to fill the DHW tank.
3. Close the hot water tap (2), after the water flow has stabilized and the air has been completely evacuated.
4. Check all the connections of the system for leaks.

FILLING THE PRIMARY CIRCUIT (Figure 2)

General remark

• If the tank is used within a heating system, refer to the heating boiler manual.

1. Check that the drain valve (3) of your primary circuit is tightly closed.
2. Open the stop valves (1) and (2) of the primary circuit connected to the heating boiler.
3. Open the air bleed valve (4) located on the top of the hot water tank.
4. When the air is eliminated, close the air bleed valve (4). Make sure the air bleed valve is tight.

CHECKS BEFORE STARTING UP

• Check that the safety valves (DHW and primary) are correctly installed and that the outlets are connected to the sewer.
• Check that the DHW tank and the primary circuit are filled with water.
• Check that the air has been correctly bled from both circuits.
• Check that the tank’s upper air bleed valve is tight.
• Check that the waterside and heat source side pipes are correctly connected and not leaking.

STARTING UP

• To put the installation into service, refer to the heating boiler manual.

Maintenance

PERIODIC CHECKS BY THE USER

• Check the pressure of the primary circuit pressure gauge: it should be between 0.5 and 1.5 bar.
• Visually inspect, regularly, the valves, connections, and accessories to detect any leaks or malfunctions.
• Periodically check the air bleed valve located on the tank top to ensure that it is not leaking.
• Check that the DHW water circuit safety valves are in good operating condition.
• In the event of a problem, please contact an engineer or your installer.

ANNUAL MAINTENANCE

Essential instructions for the correct operation of the appliance

• The discharge pipe of the safety unit must be open to the outside. If the safety unit drips periodically, it may be due to an expansion problem or clogging of the valve.
• For internal inspections, the hand hole can be used. If there is none, use one of the water connections to insert the appropriate inspection equipment. If necessary, drain the tank before inspection.

The annual maintenance service, performed by an engineer, must include:

• A check of the air bleed valve: the bleeding of air can lead to the need for adding water to the system.
• A check of the primary and DHW circuit pressure gauges.
• The manual activation of the storage water circuit safety valve once a year. This operation will lead to a discharge of hot water.
• A check of the correct operation of valves, taps, control unit, nd accessories that are possibly installed [refer to the manufacturer’s instructions if necessary].

DRAINING

Essential instruction for the safety of persons and the environment

• The water coming out of the drain valve is very hot and can cause very severe burns. Make sure the area around the hot water flow is clear of people.

Essential instruction for electrical safety

• Shut down the external electrical supply of the appliance before draining.

Essential instructions for the correct operation of the system

• Drain the tank if it is not used in winter and is at risk from exposure to ice. If the primary circuit water contains antifreeze, only the DHW tank must be drained. If the heating circuit does not contain antifreeze, the heating circuit and domestic water must be drained.
• Before draining the DHW, isolate the tank and lower the pressure of the heating circuit to 1 bar, preventing the DHW tank from being crushed.

DRAINING THE PRIMARY CIRCUIT (Figure 3)
To drain the primary circuit of the water heater:

1. Stop the charging pump.
2. Isolate the primary circuit by closing the stop valves (1).
3. Connect the drain valve (2) to the sewer using a flexible hose.
4. Open the drain valve (2) and drain the water from the primary circuit to the drain.
5. Open the tank’s air bleed valve (3) to accelerate drainage.
6. Close the drain valve (2) and air bleed valve (3) after draining the tank.

DRAINING THE DHW TANK (Figure 4)
To drain the water heater’s DHW tank:

1. Open fully the hot water tap (3) for at least 60 minutes to make sure the DHW tank has cooled down sufficiently.
2. Close the filling valve (1) and the stop valve (4).
3. Connect the drain valve (2) to the sewer using a flexible hose.
4. Open the drain valve (2) and drain the water from the DHW tank to the sewer.
5. To accelerate the tank’s drainage, open a hot water tap located higher than the tank connection in the DHW circuit.
6. Close the drain valve (2) and the hot water tap (3) after having drained the DHW tank.

BRINGING BACK INTO SERVICE AFTER MAINTENANCE
Refer to chapter “Starting Up”, page 18

• www.acv.com

Groupe Atlantic Manufacturing Belgium Rue Henry Becquerel, 1 7180 SeneffeBelgium

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