AIRWELL TFHA (01) PDF DOCUMENT

The precautions in the manual for the AIRWELL TFHA are subdivided as follows:

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

ATTENTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. This term can also be used as a warning in case of insufficiently safe procedures.

NOTE: Indicates situations that may cause only accidental damage to equipment or other property.

Please adhere to the following safety instructions when using the AIRWELL TFHA:

General Use:

The unit can be used by children from the age of 8 and by people with reduced physical, sensory or mental capacities, provided they are supervised or have received instructions on safe use. Children should not play with the device. Cleaning and maintenance must not be carried out by children without supervision.

Before cleaning, stop the unit and turn off the switch or unplug the power plug.

Exposure to water temperature above 50°C can cause severe immediate burns or death from burns. Children, people with disabilities, and the elderly are at the highest risk. Touch the water before bathing or shower. It is recommended to use a mixing valve for the water temperature.

Supervise children to ensure they do not play with the unit.

DANGER – Do NOT:

Do not insert fingers, bars, or other objects into the air inlets or outlets.

Do not touch the interior parts of the regulator.

Do not remove the front panel. Contact with certain interior parts is dangerous.

Do not use flammable sprays such as hair sprays or paints near the unit.

Do not remove, cover, or alter any instructions, labels, or data on the unit.

Do not touch the device with bare feet or wet body parts.

Do not pull, detach, or twist the electrical cables, even when disconnected from power.

Do not climb on the device or place objects on it.

Do not spray or throw water directly on the device.

Do not introduce pointed objects through the air intake and delivery grilles.

Do not open access doors to the interior parts without first setting the main installation switch to “off”.

Do not disconnect the power during normal operation.

WARNING – Electrical and Wiring:

If the power cable is damaged, it must be replaced by the manufacturer, his representative, or a qualified person.

Wiring should be carried out by professional technicians in accordance with national wiring regulations.

A disconnecting device must be incorporated in all poles with a separation distance of at least 3 mm, as well as an earth leakage circuit breaker (RCD) with a nominal value greater than 10mA.

In the event of a breakdown or defect with your AIRWELL TFHA, follow these steps:

1. Immediately deactivate the unit.

2. Contact an approved assistance centre.

3. Request the use of original spare parts.

Disabling the unit immediately in the event of a breakdown or malfunction is crucial. Do not attempt to repair the unit yourself; moving, repair, and maintenance must be entrusted to a qualified person.

The installer must instruct you, the user, on how to perform the following settings and procedures for your AIRWELL TFHA:

• On/off operation.

• Modification of setpoints.

• How to put the unit to rest.

• Basic maintenance tasks.

• What to do and not to do in the event of a breakdown.

The AIRWELL TFHA unit is designed for domestic hot water heating only, respecting the limits provided for in the technical bulletin and in the installation manual. Any other use does not involve any commitment or constraint of any kind for the manufacturer.

The quality of the water for the AIRWELL TFHA must meet the standards of European Directive 98/83 CE and the criteria defined in the UNE 112.076 standard. Water quality should be tested before use. Failure to comply with these guidelines will void the warranty on the tank. The values given are for water at 20°C.

Key Parameters:

• PH value: between 6.5 and 8.5

• Water hardness: <50 ppm.

Chemical Ingredient Parameters:

Parameter	Value	Value
Resistivity	2200 Ω.cm < R < 4500 Ω.cm
Total Alkalimetric Strength (TAS)	> 1,6 meq/l	> 8°F
Free CO2	< 15 mg/l
Calcium (CA++)	> 1,6 meq/l	> 8°F
Sulfate (SO4–)	< 2 meq/l	< 10°F
Chlorides (Cl-)	< 2 meq/l	< 10°F
Sulfates and Chlorides (SO4–+Cl-)	< 3 meq/l	< 15°F

To protect the AIRWELL TFHA from frost, you must take the following measures:

• Install the device in a place protected from frost.

• The discharge pipe connected to the safety valve must be installed in a continuous downward direction and in a frost-free location.

• The safety valve must be actuated regularly to remove lime deposits and check that it is not blocked. This helps prevent damage from overpressure due to a blocked safety device, which is not covered by the guarantee.

All electrical work must be carried out by qualified personnel. Before removing the cover, ensure the power supply is switched off.

Power Supply Requirements:

• The AIRWELL TFHA must be connected to a 230V single-phase 50Hz alternating current network.

• Power must be supplied through an independent circuit at the rated voltage.

• The electrical installation must include, upstream of the appliance, an omnipolar cut-off device (such as a 16A circuit breaker or fuse).

• The installation must include protection by a 30mA differential circuit breaker.

Grounding:

• Grounding is mandatory. A special terminal marked with the ground symbol is provided for this purpose.

• Do not use water pipes for the connection of the earthing of the unit.

Connection Procedure:

1. Ensure the sectioning device at the start of the power supply line is open, blocked, and signaled.

2. First, make the ground connection.

3. After connecting the wires, recheck the connection before turning on the unit.

4. Before powering up, ensure all protective covers removed during the work have been refitted.

DANGER: Never power the heating element directly. The safety thermostat fitted to the electrical back-up must under no circumstances be repaired. Failure to comply with this clause voids the warranty.

Please observe the following cautions and requirements when installing the AIRWELL TFHA:

• The product is heavy and must be handled with care.

• Install the device in a place protected from frost. Destruction of the device by overpressure due to a blocked safety device is not covered by the guarantee.

• Ensure the partition/floor is capable of supporting the weight of the appliance filled with water. The floor must hold a load of at least 500 kg.

• If installed in a room where the ambient temperature is permanently above 35°C, provide ventilation for this room.

• For bathroom installations, do not install in volumes V0, V1, and V2. If dimensions do not allow, it can be installed in volume V2. The installation location must comply with the IP X1B protection index.

• The product is intended for use at a maximum altitude of 2000 m.

• Place the device in an accessible place where the identification label is visible at all times.

• The water heater must be installed on a smooth, horizontal floor and must not be in contact with a wall. Level it by shimming if necessary before filling.

• The water heater must be fixed to the ground in accordance with article 20 of standard EN 60335-1.

• It is strongly recommended to install a water retention tank connected to a drain under the water heater, especially when positioned above inhabited premises.

The package for the AIRWELL TFHA thermodynamic tank contains the following items:

• 1 Water heater unit

• 1 Installation & user manual

• 1 Condensate drain pipe

The AIRWELL TFHA water heater must not be transported horizontally. Horizontal transport can lead to breakage of the plastic elements and the internal refrigeration circuit of the heat pump.

To move the water heater, use a hand truck and ensure that the inclination of the water heater does not exceed 45°.

The dimensions and specifications for the 200 L and 300 L models of the AIRWELL TFHA are as follows:

Measurement	200 L	300 L
A Cold water inlet height	243 mm	292 mm
B Hot water outlet height	1048 mm	1140 mm
C Condensate drain height	1181 mm	1298 mm
D Total height	1697 mm	1815 mm
Tank diameter	560 mm	646 mm
Air inlet/outlet diameter	153 mm	153 mm
Weight	74 kg	110 kg

The following accessories are not supplied with the AIRWELL TFHA device but can be found in our catalog or from your wholesaler:

• Straight duct Ø 160 mm (1m)

• 90° elbow Ø 160 mm

• Ø 160 mm wall air inlet/outlet

• Male/male connection Ø 160 mm

• Adapter Ø 160/160 mm

There are 3 possible installation configurations for the AIRWELL TFHA:

1. Unsheathed Interior/Interior: The unit takes air from and rejects air into the same interior room.

2. Exterior/Exterior sheathing: The unit is ducted to take air from the outside and reject it back to the outside.

3. Interior/Exterior sheathing: The unit is ducted to take air from an interior space (like a garage or laundry room) and reject it to the outside.

Regardless of the configuration, the installation location must comply with the IP X1B protection index and the floor must support a load of at least 500 kg.

For an Outdoor/Outdoor ducted installation of the AIRWELL TFHA, where air is taken from and rejected to the outside, follow these guidelines:

• This connection prevents heat loss from inside the home.

• Avoid installing the water heater and/or ducts near night rooms to ensure sound comfort.

• If the suction and discharge ducts are on the same exterior wall, provide a minimum of 800 mm between them to prevent air recirculation.

• If the minimum 800 mm distance is not possible, you must provide adjustable vents to avoid the risk of air recirculation.

• The vents must be protected from any possibility of water entering the ducts and the unit.

For an Indoor/Outdoor ducted installation of the AIRWELL TFHA, where air is taken from an indoor space and rejected outside, follow these guidelines:

• This connection keeps the suction temperature positive, so the performance in winter will be less degraded.

• The room where the unit is installed must be unheated and isolated from the heated rooms of the dwelling.

• NOTE: The rejection of air to the outside creates a depression (negative pressure) in the room, which can generate air inlets through doors and windows. To avoid sucking air from the heated space, you must provide an air inlet of the same diameter as the ducts leading to the outside.

• Example premises for this setup include a garage (to recover free calories from appliances) or a laundry room (to recover heat from washers/dryers and for dehumidification).

For an unducted (Indoor/Indoor) installation of the AIRWELL TFHA, the following requirements must be met:

• This connection keeps the suction temperature positive, so performance in winter is less degraded.

• The room must be unheated and isolated from the heated rooms of the dwelling.

• The room must have a total volume (excluding bulky items) greater than 20m³.

• The suction or discharge airflow must be diverted to avoid air recirculation.

• The temperature inside this room must remain above 5°C.

Example premises include a garage, laundry room, or a semi-buried room to recover free calories.

The following configurations and practices are prohibited for the installation of the AIRWELL TFHA:

• Water heater drawing air from a heated room.

• Connection to the VMC (Controlled Mechanical Ventilation).

• Connection to the attic.

• Ducting on the outside air at the intake and discharge of the fresh air inside the room.

• Connection to a Canadian well.

• Water heater installed in a room containing a boiler with natural draft and sheathed on the outside at the discharge only.

• Aeraulic connection of the device to a dryer.

• Installation in dusty rooms.

• Drawing of air containing solvents or explosive materials.

• Connection to hoods evacuating greasy or polluted air.

• Installation in premises subject to frost.

• Placing objects on top of the water heater.

The installation of a sanitary loop on the device is prohibited. The cold and hot water inlet/outlet are threaded in 20/27 (3/4”) M.

ATTENTION: Do not connect directly to copper pipes. The cold and hot water connections must be equipped with a dielectric connection (not supplied). Corrosion of threads not equipped with this protection is not covered by the guarantee.

Cold Water Connection (Inlet):

1. Ensure network pipes are clean.

2. A new safety unit, calibrated at 0.7 MPa (7 bar), must be installed directly to the cold water inlet of the water heater. It must be protected from frost and comply with local standards.

3. No device (shut-off valve, etc.) must be placed between the safety unit and the cold water tapping of the water heater.

4. If the supply pressure is greater than 0.5 MPa (5 bar), a pressure reducer (not supplied) is necessary. It should be installed upstream of the safety unit. A pressure of 0.3 to 0.4 MPa (3 to 4 bar) is recommended.

5. The discharge of the safety group must be connected to waste water in free flow via a siphon, in a frost-free environment. The safety unit drain valve should be operated regularly (once or twice a month).

Hot Water Connection (Outlet):

• In some regions (e.g., France), regulations may limit domestic hot water temperature at points of use (e.g., 50°C for toilets, 60°C for other rooms).

• If using synthetic material pipes (PER, multilayer, etc.), the installation of a thermostatic regulator at the outlet of the water heater is compulsory. It must be adjusted according to the performance of the material used.

To connect the condensate drain for the AIRWELL TFHA:

1. Insert the supplied condensate drain pipe into the condensate drain outlet, located at the rear of the product.

2. Cut the condensate drain pipe to the necessary length, ensuring you do not create a loop on this pipe.

3. Connect the end of the hose to the waste water drain.

For ducted installations of the AIRWELL TFHA, it is mandatory to use insulated air ducts with a diameter of 150mm or 160mm (with a sleeve 150/160mm). It is forbidden to use flexible sheaths.

WARNING: The total pressure drop of the ducts and accessories for air evacuation and suction must not exceed 100 Pa. The maximum duct lengths below must be respected.

Duct Type	Configuration	Maximum Total Length (L1+L2)
HDPE sheath Ø 160 mm	2 straight ducts	14 m
	1 straight duct, 1 duct with one 90° elbow	12 m
	2 ducts, each with one 90° elbow	10 m
	1 straight duct, 1 duct with two 90° elbows	12 m

The AIRWELL TFHA can support additional functions by connecting external components to the connection box at the back of the device. Earth connection is mandatory.

4.7.1. Photovoltaic Production (PV Input)

This function allows you to use free energy from PV panels to heat your hot water. It uses a potential-free contact to receive PV production information.

• Setup: The water heater must be in “ECON” mode and a timer must be set. Parameter F62 must be changed to 1. You must program parameter F8 to define the high setpoint temperature (60°C to 70°C, factory setting 65°C).

• Operation:

– PVINPUT closed: The higher temperature setpoint (F8) becomes active, storing solar energy as heat.

– PVINPUT open: The normal temperature setpoint is active.

4.7.2. ON/OFF Switch

This port allows you to deactivate the water heater without cutting power.

• Operation:

– ON/OFF port open: Compressor and electric heater are OFF.

– ON/OFF port closed: The water heater is operating normally.

4.7.3. HP Contact

This port allows you to deactivate the electric heater, for example during peak electricity consumption hours.

• Operation: When this port is activated, it prevents the electric heater from turning on.

Follow these steps to fill the AIRWELL TFHA water heater:

1. Open the hot water faucet(s) in your home.

2. Open the cold water tap located on the safety unit (ensure that the unit drain valve is in the closed position).

3. Wait for water to flow from the hot water taps, then close them. The water heater is now full of water.

4. Check the tightness of the pipe connections and the correct operation of the hydraulic components. Do this by opening the drain valve of the safety unit several times to eliminate any residues in the drain valve.

Before the first commissioning of the AIRWELL TFHA, perform the following verifications:

1. Check that the tank is full of water and open the water outlet tap until water flows out.

2. Check that the water pressure is normal (0.15MPa – 0.7MPa).

3. Check that the air inlet or outlet is well connected.

4. Check that the power supply voltage is normal and conforms to the requirements of the nameplate.

5. Check whether the equipped parts are well screwed/locked.

6. Check if the wirings are in accordance with the circuit diagram and the ground wire is connected.

7. Check whether the wind inlet and outlet have been cleaned and there is no obstacle.

8. Check that the condensate drain pipe is properly connected and that it is not blocked.

9. After power on, check that the control panel display is normal.

NOTE: During the first commissioning or after a power cut, the heat pump starts after a delay of 3 minutes. If the heat pump has been tilted, wait 1 hour before switching on the water heater.

The buttons on the AIRWELL TFHA control panel have the following functions:

• ON/OFF: Turn on / off the water heater.

• MODE: Change between the different operating modes of the water heater (ECON, AUTO, HEATER).

• CLOCK: Enter the clock setting mode to set the current time.

• TIMER: Enter the time schedule setting mode (for ECON mode).

• Up Arrow (▲) / Down Arrow (▼): Select, increase, or reduce values when setting the clock, timer, or temperature.

During the first commissioning, you must set the clock to allow the AIRWELL TFHA to regulate properly. Follow these steps:

1. Press the CLOCK button. The hours display will start flashing.

2. Press the Up (▲) or Down (▼) arrow buttons to adjust the hours.

3. Press the CLOCK button a second time. The minutes display will start flashing.

4. Press the Up (▲) or Down (▼) arrow buttons to adjust the minutes.

5. Once the hour and minutes have been set, press the CLOCK button one last time to exit the setting.

The AIRWELL TFHA has 3 different operating modes. To change modes, press the MODE button.

1. ECON MODE (Economical)

This is the only mode where the operating time schedules are operational. It is the most economical mode of operation, especially if you have an off-peak electricity subscription or photovoltaic panels, as you can align the timer with these periods.

2. AUTO MODE (Automatic)

This mode allows the water heater to turn on at any time when the tank temperature drops below the setpoint. Time programs are disabled. The unit operates solely based on the water temperature in the tank.

3. HEATER MODE (Electric Heater)

This mode authorizes the permanent operation of the electric heater only. The water heater turns on and off depending on the temperature inside the tank. Time schedules are disabled. This mode is the least economical and should only be used when a rapid rise in tank temperature is needed (e.g., after a vacation).

Time programming is only available in ECON mode. Make sure you are in ECON mode before proceeding.

1. Press the TIMER button to enter the time range setting.

2. The first time range, P1, will flash, and the alarm clock ON icon will also flash. Use the Up (▲) and Down (▼) buttons to set the ON hour and minute.

3. Press TIMER again to switch to setting the alarm OFF time for P1. The alarm clock OFF icon will flash.

4. Use the Up (▲) and Down (▼) buttons to set the OFF hour and minute.

5. Follow the same principle to set the other time slots (P2, P3).

If an error occurs with your AIRWELL TFHA, a sound will be heard, the “Alarm” message will appear on the screen, and an error code will display alternately with the temperature. Some alarms may disappear automatically. Refer to the table below for details.

Error codes	Detail	Causes	Solutions
A1	Water temperature sensor	The water temperature sensor is damaged or incorrectly connected	-Reconnect the probe -Change the probe
A2	Condenser temperature sensor	The condenser temperature sensor is damaged or incorrectly connected	-Reconnect the probe -Change the probe
A3	Discharge air temperature sensor	The discharge air temperature sensor is damaged or incorrectly connected	-Reconnect the probe -Change the probe
A4	Room temperature sensor	The room temperature sensor is damaged or incorrectly connected	-Reconnect the probe -Change the probe
A5	High pressure	-High pressure protection -Ambient temperature too high or dirty heat exchanger	-Check and/or change the high pressure sensor -Check the ambient temperature -Clean the exchanger
A6	Electric heater overheating	-Electric heater high temperature protection -Boiler water too hot	-Check the temperature of the balloon -Change the electric heater
A7	Compressor discharge temperature	-Lack of refrigerant -Presence of air in the circuit -Lack of oil in the compressor	-Top up refrigerant -Replace the vacuum and fill with refrigerant -Change compressor oil
A8	Condensate overflow	-Clogged condensate drain pipe -Clogged condensate drain hole	-Check that the pipes are not clogged -Check that the hole is not blocked
A9	Compressor suction temperature sensor	The compressor suction temperature sensor is damaged or incorrectly connected	-Reconnect the probe -Change the probe
—	Display does not turn on or malfunctions	-Power supply problem -Communication cable between the display and the electronic card damaged or incorrectly connected	-Check power supply and voltage -Reconnect the communication cable -Change display -Change the electronic card

WARNING: Modification of the water heater’s operating parameters is reserved for qualified personnel. Changing these parameters is likely to affect the performance and correct operation of the water heater.

To access the parameters:

1. Press and hold the MODE button for 5 seconds.

2. Once in parameter mode, the parameter code will be displayed. Press the Up (▲) or Down (▼) arrow buttons to change the selected parameter code.

3. To modify the value of the selected parameter, press the TIMER button.

4. Use the Up (▲) or Down (▼) arrow buttons to change the parameter value.

5. Press TIMER again to save the change and exit value modification.

The following tables detail the available parameters:

Code	Detail	Range	Factory setting	Unit	Notes
Temperatures setting
F6	Fast DHW temperature start	5-75	35	°C
F7	Fast DHW temperature stop	5-75	50	°C
F8	High temperature PV function	60-70	65	°C	Temperature when PV is available.
F11	Maximum target temperature	5-75	55	°C	Sets the maximum temperature that can be set on the control panel.
F12	Temperature difference	1-30	5	°C	Delta T before restarting the heat pump.
F13	HP minimum ambient temperature	-10 – 5	-7	°C	Minimum ambient temperature for heat pump operation.
F14	Maximum heat pump water temperature	20-75	55	°C	Maximum water temperature for operation of the heat pump.
F15	Activation of the electric heater	0-1	1	–	Authorize the activation of the electric heater. (0 = No / 1 = Yes)
F16	Ambient temperature for EH	-10 – 20	0	°C	Ambient temperature below which the electric heater is activated.
F17	Activation of the EH during the AL cycle	0-1	1	–	Allow the activation of the electric heater during the anti-legionella cycle. (0 = No / 1 = Yes)
F18	Anti-legionella cycle	1-990	336	Hour	Time between 2 anti-legionella cycles.
F19	Water temperature sensor hysteresis	-5 – 5	0	°C	Temperature reading compensation.
Compressor
F21	Startup delays	0-10	3	Minute	Compressor start delays.
F28	Activation of EH in ECON mode	0-1	1	–	Allows operation of the electric heater in ECON mode. (0 = No / 1 = Yes)
F29	Activation of the heat pump in HEATER mode	0-1	1	–	Authorizes operation of the heat pump in HEATER mode. (0 = No / 1 = Yes)
Defrost
F31	Defrost activation temperature	-20 – 20	-2	°C	Condenser temperature for start of defrost cycle.
F32	Defrost stop temperature	0-50	25	°C	Condenser temperature for defrost stop.
F33	Time before defrost	1-999	30	Minute	Minimum operating time before defrosting.
F34	Maximum defrost duration	Off, 1-99	5	Minute	Maximum defrost duration
Function
F61	Power failure memory	Yes/No	Yes		Auto restart after power failure.
F62	PV function enable	0-1	0		0 = No, 1 = Yes
F64	Fast DHW operation	0-1	0		0 = No, 1 = Yes
Expansion valve (EEV)
F72	EEV manual opening	100 – 480	350
System
F80	Password	OFF, 0001-9999	4321		OFF = no password, 0000 = to clear password
Test
F98	Test mode (cold)	Adf			Fan, EEV and compressor start. Press any button to stop. Otherwise stop after 20 minutes.

To ensure safe and efficient operation of your AIRWELL TFHA, regular maintenance is necessary. Disconnect the power supply before cleaning any component.

• Once a month: Clean the air inlet/outlet filter net. If necessary, clean the heat exchanger, being careful not to damage the copper tubes.

• Once every 3 months: Clean the water heater inlet filter.

• Once every 6 months: Drain all storage water and repeatedly wash the tank 2-3 times to remove dirt and sediment.

• Once every 6 months: Clean the electric heater.

• Once every 6 months: Check the magnesium anode for anti-corrosion and anti-limescale performance. Depending on the water quality, change the anode when it runs out.