Enviro Energy Solutions EBER 7000, EBER 800 Technical Manual

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Enviro Energy Solutions EBER 7000, EBER 800 Technical Manual | Manualzz

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EBER SERIES

HIGH CAPACITY VERTICAL TANKS

WITH EXTRACTIBLE HEAT EXCHANGERS

TECHNICAL MANUAL

Before the installation and use of an ENVIROENERGY SOLUTIONS Solar Tank, Buffer Tank, Heat Pump Tank or electric Calorifier please read and observe carefully all the instructions concerning the installation, maintenance and use of the product, in this manual. The non-observance of these instructions may result in the cancelation of the warranty.

GENERAL SAFETY INSTRUCTIONS

Attention when lifting the tank and always take precautions in order to avoid possible accidents, injuries and other hazards.

During transportation and handling of the tank avoid abrupt movements as they may result in fall and damaging of the Tanks. To avoid damaging the tank, do not remove the packaging, until it reaches the installation location.

All installations and maintenance must be performed by qualified and certified professionals, following all relevant local norms and regulations (1), industry codes, and according to the manufacturer’s instructions.

Always make sure that the installation site, especially on roof tops, is adapted to the weight and mechanical restraints of Tank when full (and eventually a 30% margin), as well as any further weight expected (snow, rain, etc...). ENVIROENERGY SOLUTIONS declines any responsibility that may arise from an improper or defective installation or from incorrect manipulation of the system or accessories composing it.

Always make sure there is enough space around the Tank for maintenance purposes, as well as for the electric cabling and plumbing. It is recommended to agree with the client for the location of the installation and the routing of pipes and cabling.

In case the Tank is placed Outdoors in regions with heavy snow fall or strong winds, it may be necessary to further anchor the system to the point of installation. In this case it is up to the installer along with the client to determine the best and safe way to install the Tank. Additional fixing points or equipment may be required.

Never fill the closed circuit or connect the electric element with an empty tank. The tank must always be filled with water during these operations due to a risk of severe damage to the Tank.

Before starting the installation or maintenance, the main power supply to the system must always be turned OFF, and the Heat Exchangers in case of Removable Heat Exchangers, must be removed.

Improper installation and works can contaminate the potable water. Install the Tank hygienically and rinse the Tanks and piping thoroughly with potable water

Install and use potable water pipes according to current standards and local norms and regulations.

The use of plastic, PVC or polypropylene piping is not recommended, especially for the closed circuit, due to the very high temperatures developed by the installations. In any case, make sure that all the piping used in contact or close to the systems outlets can withstand minimum temperatures of 100ºC, or 180ºC if in contact with the primary (closed) circuit.

ENVIROENERGY SOLUTIONS recommends the use of copper or stainless-steel piping for safer and higher performance.

It is recommended that the Tanks be maintained by a professional, checked and cleaned at least every 2 years. In locations with hard or dirty water an annual maintenance and cleaning is recommended. Please refer to the “Maintenance and Servicing” sect ion of this manual.

A pressure release and safety valve is mandatory on the cold-water inlet of the tank and a pressure reducing valve is mandatory in case the pressure of the water coming into the tank is above 3 bar.

A mixing valve is compulsory on the hot water outlet in order to limit risks of burning and Expansion

Vessels are recommended in order to limit pressures in the Tank and unnecessary loss of Water.

GENERAL INSTALLATION INSTRUCTIONS

Always make sure that all the piping of the primary and secondary circuits, going to and coming from the

Tank, are very well insulated, even in hot climate regions and treated for UV radiation.

Avoid leaving the Tanks for long periods without using hot water (holidays, prolonged absences, etc...) due to risks of overheating, or make sure all the heating sources (solar panels, heat pumps, electric elements, burners, etc…) are turned off or inactive during this period.

In case of use of Electric Heating Elements, the Tanks must be grounded

It is recommended that the installation location be equipped with functional drainage on the floor

Hydraulic connections to the tank must be such as to limit the phenomenon of electrolysis

Every service and maintenance should be recorded in the maintenance book. This record is a key element to the validity of the warranty and should be made available on request

Under no circumstances should any welding or repairing be made on the tank’s met al structure. Risk of deterioration or destruction of the tank and annulation of the warranty.

The electric heating element is not part of the system but an additional part and it should be installed by a certified electrician. The electric back-up should be used only in case the water temperature in the Tank is under 50°C. The constant and unreasonable use of the electric back-up may cause damage to the tank and cause annulation of the warranty.

The quality of the water entering the Tanks should be within potable standards and in any case be within the values of the table below. If the quality of the water does not correspond to these values then special filters and water softeners may need to be installed to satisfy these conditions, or the warranty will not be valid.

Specification ph

WATER QUALITY REQUIRMENTS

Total Hardness Chlorides Free Chlorine Conductivity TDS

Value 7-9 <100 mg/1 <0,5 mg/lt <80 mg/lt <650 mS/cm 25°C <600 mg/lt

WARNING:

IF THE HOT WATER SYSTEM IS NOT USED FOR TWO WEEKS OR MORE, A QUANTITY OF HIGHLY FLAMMABLE

HYDROGEN GAS MAY BE ACCUMULATED IN THE WATER HEATER. TO DISSIPATE THIS GAS SAFELY, IT IS

RECOMMENDED THAT A HOT TAP BE TURNED ON FOR SEVERAL MINUTES UNTIL DISCHARGE OF GAS CEASES.

USE A SINK, BASIN, OR BATH OUTLET, BUT NOT A DISHWASHER, CLOTHES WASHER OR OTHER APPLIANCE.

DURING THE PROCEDURE THERE MUST BE NO SMOKING, OPEN FLAME OR ANY ELECTRICAL APPLIANCE

OPERATING NEARBY. IF HYDROGEN IS DISCHARGED THROUGH THE TAP, IT WILL PROBABLY MAKE AN UNUSUAL

SOUND AS WITH AIR ESCAPING.

The safety of the Tanks and validity of the warranty are conditioned by the use of genuine ENVIROENERGY

SOLUTIONS spare parts and accessories. Please only use genuine ENVIROENERGY spare parts and accessories from your nearest ENVIROENERGY SOLUTIONS dealer or contact the manufacturer.

ENVIROENERGY SOLUTIONS declines any responsibility that may arise from the non-observance of the installation, maintenance and use instructions herein, non-observance of relevant local norms, regulations and industry codes, improper or defective installation, or incorrect manipulation of the system or the accessories composing it.

TECHNICAL SPECIFICATIONS

• Internal Tank Material: Steel

• Welding Type: Automatic

Internal Tank Protection: Alimentary quality Epoxy Resin

Anodic Protection: Magnesium Rod

Maximum Working Pressure: 10 bar

Water Test Pressure: 15 bar

Maximum Operating Temperature: 95°C

Insulation: Removable Polyurethane foam thickness 55mm, density 52kg/m3

Coil: Steel Tube

Maximum Coil Test Pressure: 25 bar

Electric Heater: Optional, Power Output Upon Request

Flange Diameter: internal Ø420 mm - external Ø508 mm

External Cover: Metallic or Soft PVC (color upon request)

EBER SERIES TANKS WITH 1,2 OR 3 REMOVABLE HEAT EXCHANGERS, FLANGE AND ELECTRIC ELEMENT OPTIONS

Model

EBER

800

EBER

1000

EBER

1500

EBER

2000

EBER

3000

EBER

4000

EBER

5000

EBER

7000

EBER

9000

Nominal Volume (Lt) 750 1000 1500 2000 3000 4000 5000 7000 9000

Actual Volume (Lt)

Internal Tank Weight (kg)

3,2m 2 Heat Exchanger Weight (kg)

5,4m 2 Heat Exchanger Weight (kg)

7,8m 2 Heat Exchanger Weight (kg)

External Cover and Insulation

Weight (kg)

Total Tank Weight with 3,2m 2 Coil

(Kg)

Total Tank Weight with 5,4m 2 Coil

(Kg)

Total Tank Weight with 7,8m 2 Coil

(Kg)

Internal Tank Body Thickness

(mm)

757

265

14

357

388

---

4

940

405

16

499

530

---

4

1480

420

78

20

518

549

---

N/A

1940

490

109

24

592

623

---

5

2940

645

34

757

788

---

3960

850

39

----

998

---

6

4700

930

45

---

1084

1129

N/A

6950

1400

154

58

---

1567

1612

7

N/A

8960

1800

67

---

1976

2021

8

Internal Tank Upper and Lower

Caps Thickness (mm)

4 4 6 7 8 9

Tilt Height (mm)

Flange Ø (mm)

Ventilation VEN

Drain

Electric Back-up Heating Element

(EH1 and EH2)

2060

1 ½’’

2236

---

2386 2442 2916

508

1 ½’’

1 ½’’

3149

1 ½’’

3287 3774 3966

EBER 1500 WITH 1 OR 2 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower Heat

Exchanger

3,2m 2

5,4m 2

5,4m 2

Upper Heat

Exchanger

3,2m

3,2m

2

2

5,4m 2

Total H.E.

Surface

6,4m 2

8,6m

10,8m

2

2

FLOW RATE

1800 Lt/h

2600 Lt/h

3900 Lt/h

LOWER HEAT EXCHANGER EFFICIENCY

3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

49,10kW

55,20kW

62,20kW

65,30kW

78,40kW

91,10kW

UPPER HEAT EXCHANGER EFFICIENCY

FLOW RATE 3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

1800 Lt/h

2600 Lt/h

48,10kW

54,50kW

64,60kW

79,20kW

3900 Lt/h 61,40kW

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

Heat Exchanger Inlet Temperatures 80°C

90,90kW

➢ The Lower Heat Exchanger Heats 88% of the Tank

➢ The Upper Heat Exchanger Heats 52% of the Tank

EBER 2000 WITH 1 OR 2 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower Heat

Exchanger

3,2m 2

5,4m 2

Upper Heat

Exchanger

3,2m

3,2m

2

2

Total H.E.

Surface

6,4m 2

8,6m 2

5,4m 2

5,4m 2 10,8m 2

FLOW RATE

1800 Lt/h

2600 Lt/h

3900 Lt/h

LOWER HEAT EXCHANGER EFFICIENCY

3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

47,80kW

55,10kW

61,10kW

65,00kW

77,95kW

90,50kW

UPPER HEAT EXCHANGER EFFICIENCY

FLOW RATE 3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

1800 Lt/h

2600 Lt/h

47,80kW

54,95kW

64,70kW

78,50kW

3900 Lt/h 61,10kW

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

Heat Exchanger Inlet Temperatures 80°C

91,60kW

➢ The Lower Heat Exchanger Heats 88% of the Tank

➢ The Upper Heat Exchanger Heats 52% of the Tank

EBER 3000 WITH 1 OR 2 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower Heat

Exchanger

3,2m 2

5,4m 2

Upper Heat

Exchanger

3,2m

3,2m

2

2

Total H.E.

Surface

6,4m 2

8,6m 2

5,4m 2

5,4m 2 10,8m 2

FLOW RATE

3000 Lt/h

4000 Lt/h

5000 Lt/h

LOWER HEAT EXCHANGER EFFICIENCY

3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

57,30kW

62,20kW

64,70kW

82,10kW

91,50kW

98,30kW

UPPER HEAT EXCHANGER EFFICIENCY

FLOW RATE 3,2m 2 Heat Exchanger Efficiency 5,4m 2 Heat Exchanger Efficiency

3000 Lt/h

4000 Lt/h

57,20kW

62,15kW

82,00kW

90,60kW

5000 Lt/h 64,90kW

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

Heat Exchanger Inlet Temperatures 80°C

98,80kW

➢ The Lower Heat Exchanger Heats 86% of the Tank

➢ The Upper Heat Exchanger Heats 4% of the Tank

EBER 4000 WITH 1 OR 2 REMOVABLE HEAT EXCHANGERS

1700

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower Heat

Exchanger

5,4m 2

Upper Heat

Exchanger

5,4m 2

Total H.E.

Surface

10,8m 2

FLOW RATE

3000 Lt/h

4000 Lt/h

5000 Lt/h

LOWER HEAT EXCHANGER EFFICIENCY

5,4m 2 Heat Exchanger Efficiency

82,30kW

91,45kW

97,30kW

UPPER HEAT EXCHANGER EFFICIENCY

FLOW RATE 5,4m 2 Heat Exchanger Efficiency

3000 Lt/h

4000 Lt/h

82,50kW

91,55kW

5000 Lt/h

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

Heat Exchanger Inlet Temperatures 80°C

96,80kW

➢ The Lower Heat Exchanger Heats 86% of the Tank

➢ The Upper Heat Exchanger Heats 43% of the Tank

EBER 5000 WITH 1 OR 2 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower Heat

Exchanger

5,4m 2

Upper Heat

Exchanger

5,4m 2

Total H.E.

Surface

10,8m 2

FLOW RATE

3000 Lt/h

4000 Lt/h

5000 Lt/h

LOWER HEAT EXCHANGER EFFICIENCY

5,4m 2 Heat Exchanger Efficiency

81,95kW

91,30kW

97,50kW

UPPER HEAT EXCHANGER EFFICIENCY

FLOW RATE 5,4m 2 Heat Exchanger Efficiency

3000 Lt/h

4000 Lt/h

82,15kW

91,20kW

5000 Lt/h

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

Heat Exchanger Inlet Temperatures 80°C

97,90kW

➢ The Lower Heat Exchanger Heats 87% of the Tank

➢ The Upper Heat Exchanger Heats 45% of the Tank

EBER 7000 WITH 1,2 OR 3 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower

Heat

Exchanger

7,8m 2

Upper

Heat

Exchanger

7,8m 2

Middle

Heat

Exchanger

7,8m 2

Total H.E.

Surface

23,4m 2

EFFICIENCY OF ALL 3 HEAT EXCHANGERS

FLOW RATE

3000 Lt/h

4000 Lt/h

7,8m 2 Lower Heat

Exchanger Efficiency

104,60Kw

119,40Kw

7,8m 2 Middle Heat

Exchanger Efficiency

104,15Kw

119,30Kw

5000 Lt/h 130,00Kw

Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

• Heat Exchanger Inlet Temperatures 80°C

129,90Kw

➢ The Lower Heat Exchanger Heats 88% of the Tank

➢ The Middle Heat Exchanger Heats 60% of the Tank

➢ The Upper Heat Exchanger Heats 35% of the Tank

7,8m 2 Upper Heat

Exchanger Efficiency

104,80Kw

119,50Kw

129,60Kw

EBER 9000 WITH 1,2 OR 3 REMOVABLE HEAT EXCHANGERS

AND ELECTRIC ELEMENT OPTION

CWI

HWO

R

VEN

CI

CO

S

T

TR

EH

ABREVIATIONS

Cold Water Inlet

Hot Water Outlet

Recirculation

Ventilation

Coil Inlet

Coil Outlet

Sensor

Thermostat

Thermometer

Electric Heating Element

HEAT EXCHANGER COMBINATIONS AVAILABLE

Lower

Heat

Exchanger

7,8m 2

Upper

Heat

Exchanger

7,8m 2

Middle

Heat

Exchanger

7,8m 2

Total H.E.

Surface

23,4m 2

EFFICIENCY OF ALL 3 HEAT EXCHANGERS

FLOW RATE

3000 Lt/h

7,8m 2 Lower Heat

Exchanger Efficiency

104,70Kw

4500 Lt/h 125,30Kw

6000 Lt/h 138,60Kw

• Heat Exchanger Efficiencies for DHW Heating from 15°C to 60°C

• Heat Exchanger Inlet Temperatures 80°C

7,8m 2 Middle Heat

Exchanger Efficiency

104,30Kw

124,60Kw

137,60Kw

➢ The Lower Heat Exchanger Heats 88% of the Tank

➢ The Middle Heat Exchanger Heats 61% of the Tank

➢ The Upper Heat Exchanger Heats 37% of the Tank

7,8m 2 Upper Heat

Exchanger Efficiency

105,40Kw

124,20Kw

137,30Kw

INSTALLATION INSTRUCTIONS

Pic. 2

Pic. 4

Pic. 1

A.

LIFTING THE TANKS INTO POSITION

Tanks above 5000Lt come on a metallic Pallet for safe and secure transportation, as per picture 1 on the left. First carefully remove the cardboard covers and tape without using sharp tools in order to avoid damage to the tanks external cover and insulation.

The Tank must be lifted into position using the hooks available either on the Metallic

Pallet as per picture 2 on the left, or on the

Top of the Internal Tank as per picture 3 on the right. Never lift the tank using the inlets of the Tank or the Heat Exchangers by risk of damaging the Tank.

Lifting

Hooks

When lifting the Tank into position, the bottom of the metallic

Transportation Pallet must always remain in contact with the Floor as per Picture 4 on the Left. When in

Position the Pallet remains fixed on the Tank as per picture 5 on the Right.

Pic. 3

Lifting

Hooks

Pic. 5

Pic. 7

Pic. 6

Once the Tank Is placed in its final installation location and positioned properly, unscrew the bolts that fix the Metallic Pallet to the Flanges of the Tank as per picture 6 above left and remove it as per picture 7 above in the middle. Then put the bolts back in place screwing the flanges to the Tank as per picture 8 above on the right.

Pic. 10

Pic. 11

Pic. 9

Place the Insulation of the Top of the Tank and the Top Cover as per picture 9 above left. Then Install the Flanges and Flange

Covers as per picture 10 above in the middle and finally install the plastic gaskets on the Flange Covers as per picture 11 above right.

Pic. 8

B.

INSTALLING AND REMOVING THE HARD INSULATION SHELL

When Installing or Removing the Hard Insulation Shell, it is Imperative to follow the order 1 to 7 as per the pictures below. The smallest part is placed last.

General View

Pic. 1

Pic. 2

Pic. 3

Pic. 4

Pic. 5

Pic. 6

C.

REMOVING THE HEAT EXCHANGERS

Attention: When placing or removing the Heat Exchangers from the Tank, never drag them or let them come into contact with the inner surface of the Flange Hole. Risk of damaging the Heat

Exchanger and the Enamel coating which may result to corrosion.

Pic. 7

MAINTENANCE AND TROUBLESHOOTING

A.

MAINTENANCE AND SERVICING OF THE SYSTEM

1.

General maintenance

In order to ensure the constant well-functioning of the Tanks, they must be reviewed and maintained periodically

(see warranty sheet) and the warranty sheet accompanying must be completed accordingly by the installer.

All installations and maintenance must be performed by qualified and certified professionals, following all relevant local norms and regulations (1), industry codes, and according to the manufacturer’s instructions.

Before starting any maintenance work, the main power supply to the system must always be turned OFF, and the Heat Exchangers in case of Removable Heat Exchangers, must be removed.

Revisions consists of:

➢ The optical and physical inspection of the tightness of all joints and connections (hydraulic and electrical), verification that all safety valves, pressure reducing valves and mixing valves are working properly (safety valves on primary and secondary circuit), that the insulation of all the pipes is in good condition.

➢ Making sure that scale and salts have not accumulated in the valves or in the Tank. Poor water quality at the water can result in scale formation and may block the safety valves and Tank outlets leaving the tank unprotected against very high temperatures above 90°C and high pressure (greater than 10 bars).

➢ Making sure the electrical heating elements and thermostats are working properly and do not have scale or salts accumulation.

➢ Cleaning of the Tanks and removal of scale or deposits inside the Tanks, on the Heat Exchangers and on the electric elements, valves , etc…

➢ Making sure that the Heat exchanger is in good conditions and perfect working order

➢ The anode (magnesium rod) must be checked every year and replaced if it has been worn-out or reduced to 50% of its initial size or weight or if it has been covered by the accumulation of salts.

➢ Verifying that the weight of the thermal fluid in the primary circuit is adapted to local climatic conditions. The thermal fluid must in any case be changed at least every 3 years as it loses its properties through time.

➢ Verifying that the water quality entering the Tank is within standards as per the requirements in the table in the General Installation Instructions in this manual and the eventual filters and water softeners are in proper working order.

Attention: do not use any detergents, acids or any other corrosive products that may damage the enamel lining of the Tanks.

2.

Replacing the sacrificial anodes (magnesium rods)

For optimal protection of the system against electrolysis, all ENVIROENERGY SOLUTIONS tanks include magnesium rods (sacrificial anodes) which must be checked and replaced if necessary, at least every year depending on the quality of the water. The size of the anode varies depending on local norms and requirements.

For replacing the anode, proceed as follows:

Shut down the main power supply

Remove the safety valves or expansion vessel.

Empty the tank.

Remove the protective cover of the flange and Heat exchanger.

Pull out the thermostat with caution.

Remove the flange and unscrew the anode. Screw-on a new anode and following the same procedure backwards prepare and set the system back to work.

B.

TROUBLESHOOTING

In case the Solar Water Heater does not produce enough hot water, please verify the following:

1.

That all hydraulic connections of the system are water tight and there are no leaks.

2.

That there are no leaks on the taps or on the piping of the building

3.

That the heating sources are working properly.

4.

If the level of the thermal fluid in the closed circuit is not too low. Set to level filling with thermal fluid mixture through the fluid inlet where the safety valve or expansion vessel is placed.

5.

That the pipes connecting the heating source to the tank are not bent twisted nor have any angles.

6.

That there is no air trapped in the closed circuit of the system.

7.

That the supply of cold and hot water is connected.

8.

That the temperature set on the mixing valve is not too low (below 50ºC depending on local regulations)

9.

If the electric back-up is working. In case it is not working please check the following:

That the main power supply is ON

That the thermostat is not set too low

That the back-up element is not on security mode. The security button must be pushed-in

That the thermostat and back-up element are not damaged

That the back-up element wiring is properly connected and to the relevant terminals

If problems persist, then please consider: a) That the weather conditions allow the proper heating of the system b) The hot water consumption does not exceed the installation’s capacity, or the consumers’ expectations of are not above this capacity. c) The consumer has understood the use of the electrical back-up

Note: all verifications and interventions must be carried out by qualified and certified personnel.

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