Bluehelix Maxima - Boiler FERROLI - Free user manual and instructions

Product Type	Condensing combi boiler (sealed chamber, premix)
Models	Bluehelix Maxima 24C, 28C, 34C
Dimensions (H x W x D)	700 x 420 x 320 mm
Weight	28 kg (24C, 28C), 32 kg (34C)
Power Supply	230 V ~ 50 Hz
Electrical Power Input	73 W (24C), 82 W (28C), 99 W (34C)
Max Heating Output (80/60°C)	20.0 kW (24C), 24.0 kW (28C), 30.0 kW (34C)
Min Heating Output (80/60°C)	2.8 kW (all models)
DHW Output (max)	24.5 kW (24C), 28.0 kW (28C), 34.0 kW (34C)
DHW Flow Rate (ΔT 25°C)	14.0 l/min (24C), 16.1 l/min (28C), 19.5 l/min (34C)
Gas Types	Natural gas (G20) and LPG (G31)
Efficiency (30% load)	109.7% (24C, 28C), 109.5% (34C)
NOx Class	6 (< 56 mg/kWh)
Protection Rating	IPX4D
Max Working Pressure (Heating)	3.0 bar
Max Working Pressure (DHW)	9.0 bar
Expansion Vessel Capacity	8 L (24C, 28C), 10 L (34C)
Installation Environment	Indoor or partially protected outdoor (down to -5°C, -15°C with kit)
Maintenance Interval	Annual inspection by qualified personnel
Control Panel	Touchscreen with temperature adjustments, ECO mode, pressure display

Frequently Asked Questions - Bluehelix Maxima FERROLI

How do I adjust the heating temperature on my Bluehelix Maxima?

Use the heating buttons (details 12 and 14 on the control panel) to adjust the setpoint from 20°C to 80°C. The current temperature is displayed.

How do I adjust the domestic hot water (DHW) temperature?

Use the DHW icons (details 11 and 13) to set the DHW temperature between 35°C and 55°C.

What does the ECO mode do?

ECO mode minimizes energy consumption by reducing standby heat, but may increase DHW delivery time. Disable ECO for immediate hot water availability.

How do I reset the boiler after a fault?

Touch the [RESET] button when a fault screen appears, or go to the main menu, select 'Boiler Reset' and confirm. Ensure the fault cause is resolved first.

How do I refill the system pressure?

The filling knob is behind the front panel. Pull it out and turn anticlockwise to refill to about 1.0 bar (cold system). Close after filling.

What gas types are compatible with this boiler?

The boiler is compatible with Natural Gas (G20, G25, G27, etc.) and LPG (G30, G31). Gas conversion requires adjusting the throttle and parameter settings.

Why is my boiler showing fault code A01?

Fault A01 indicates no burner ignition. Check that the gas supply is on, there is no air in the pipes, and the ignition electrode is clean and correctly positioned.

How often should I service my Bluehelix Maxima?

A yearly inspection by a qualified technician is recommended. This includes checking combustion values, cleaning the burner and heat exchanger, and verifying safety devices.

Can the boiler be installed outdoors?

Yes, in a partially protected place with temperatures down to -5°C. For temperatures as low as -15°C, an optional frost protection kit (013022X0) is required.

How do I clean the exterior of the boiler?

Use a mild degreaser for painted plastic panels, isopropyl alcohol for the glass panel, and a mild detergent for side panels. Avoid abrasive chemicals.

USER MANUAL Bluehelix Maxima FERROLI

3D rendering of a gray and black rectangular device with a central square cutout (no visible text or symbols)

CE

IT

fig. 1 -

Technical line drawing of a mechanical assembly with gears and mounting base (no text or symbols)

Technical line drawing of a mechanical device with multiple ports and mounting brackets (no text or symbols)

fig. 12

Diagram of a mechanical assembly with a spring-loaded component and directional arrows indicating motion (no text or symbols)

fig. 13

A = BLUEHELIX MAXIMA 24C

∅50 - 28 m MAX

∅60 - 78 m MAX

BLUEHELIX MAXIMA 28C

∅50 - 22 m MAX

∅60 - 60 m MAX

BLUEHELIX MAXIMA 34C

∅50 - 17 m MAX

∅60 - 45 m MAX

fig. 23

Technical line drawing of a mechanical assembly with gears and a central motor (no text or symbols)

Technical line drawing of a mechanical device with multiple ports and mounting brackets (no text or symbols)

fig. 12

Diagram showing a mechanical assembly with a component inserted into a housing, indicated by arrows (no text or symbols present)

fig. 13

A = BLUEHELIX MAXIMA 24C

∅50 - 28 m MAX

∅60 - 78 m MAX

BLUEHELIX MAXIMA 28C

∅50 - 22 m MAX

∅60 - 60 m MAX

BLUEHELIX MAXIMA 34C

∅50 - 17 m MAX

∅60 - 45 m MAX

Technical diagram of a mechanical assembly with two views (1 and 2) showing internal components and motion arrows, no readable text or symbols present.

fig. 23

fig. 9- Buton de umplere

Technical line drawing of a mechanical assembly with gears and components (no visible text or symbols)

Technical line drawing of a mechanical device with multiple ports and mounting brackets (no text or symbols)

fig. 12

Diagram showing a mechanical assembly with a spring-loaded component and a separate box, no text or symbols present.

fig. 13

A = BLUEHELIX MAXIMA 24C

∅50 - 28 m MAX

∅60 - 78 m MAX

BLUEHELIX MAXIMA 28C

∅50 - 22 m MAX

∅60 - 60 m MAX

BLUEHELIX MAXIMA 34C

∅50 - 17 m MAX

∅60 - 45 m MAX

fig. 23

Verificarea valorilor de combustie

ASIGURATI-VĂ CĂ PANOUL FRONTAL ESTE ÎNCHIS, IAR CONDUCTELE DE ASPIRATIE/EVACUARE GAZE ARSE SUNT ASAMBLATE COMPLET.

fig. 25- Curbe de compensare

Technical line drawing of a mechanical assembly with labeled component '1' (no readable text or symbols)

Technical line drawing of a mechanical device with multiple ports and mounting brackets (no text or symbols)

wygląd 1 2

Diagram of a mechanical assembly with a component inserted into a housing, showing directional arrows (no text or symbols)

wygląd 1 3

A = BLUEHELIX MAXIMA 24C

∅50 - 28 m MAX

∅60 - 78 m MAX

BLUEHELIX MAXIMA 28C

∅50 - 22 m MAX

∅60 - 60 m MAX

BLUEHELIX MAXIMA 34C

∅50 - 17 m MAX

∅60 - 45 m MAX

wygląd 2 3

• Read the warnings in this instruction booklet carefully since they provide important information on safe installation, use and maintenance.
• This instruction booklet is an integral and essential part of the product and must be kept with care by the user for future reference.
• If the unit is sold or transferred to another owner or if it is to be moved, always make sure the booklet stays with the boiler so that it can be consulted by the new owner and/or installer.
  • Installation and maintenance must be carried out by professionally qualified per-

sonnel, according to current regulations and the manufacturer's instructions.

• Incorrect installation or inadequate maintenance can result in damage or injury. The manufacturer declines any liability for damage caused by errors in installation and use or by failure to follow the instructions provided.
• Before carrying out any cleaning or maintenance operation, disconnect the unit from the power supply using the system switch and/or the special cut-off devices.
  • In case of a fault and/or poor operation, deactivate

This symbol indicates “CAUTION” and is placed next to all safety warnings. Strictly follow these instructions in order to avoid danger and damage to persons, animals and things

This symbols calls attention to a note or important notice.

This symbol, which is used on the product, packaging or documents, means that at the end of its useful life, this product must not be collected, recycled or disposed of together with domestic waste.

Improper management of electric or electronic waste can lead to the leakage of hazardous substances contained in the product. For the purpose of preventing damage to health or the environment, users are kindly asked to separate this equipment from other types of waste and to ask for it to be dealt with by the municipal waste service or dealer under the conditions and according to the methods set down in national and international laws transposing the Directive 2012/19/EU.

Separate waste collection and recycling of unused equipment helps to save natural resources and to guarantee that this waste is processed in a manner that is safe for health and the environment.

For more information about how to collect electric and electronic equipment and appliances, please contact your local Council or Public Authority competent to issue the relevant permits.

The CE marking certifies that the products meet the essential requirements of the relevant directives in force.

The declaration of conformity may be requested from the manufacturer.

COUNTRIES OF DESTINATION: IT - ES - RO - PL

the unit and do not try to re-pair it or directly intervene. Contact professionally qualified personnel. Any repair/replacement of the products must only be carried out by qualified personnel using genuine parts. Failure to comply with the above can compromise the safety of the unit.

- Periodic maintenance performed by qualified personnel is essential in order to ensure proper operation of the unit.

- This unit must only be used for its intended purpose. Any other use is deemed improper and therefore hazardous.

• After unpacking, check the good condition of the contents. The packing materials are potentially hazardous and must not be left within the reach of children.

- The unit can be used by children aged at least 8 years and by persons with reduced physical, sensory or mental capabilities, or lacking experience or the

necessary knowledge, only if under supervision or they have received instructions on its safe use and the related risks. Children must not play with the unit. Cleaning and maintenance intended to be done by the user can be carried out by children aged at least 8 years only if under supervision.

- In case of doubt, do not use the unit. Contact the supplier.

- The unit and its accessories must be appropriately disposed of in compliance with current regulations.

- The images given in this manual are a simplified representation of the product. In this representation there may be slight and insignificant differences with respect to the product supplied.

1 Operating instructions .... 192

1.1 Introduction....192
1.2 Control panel....192
1.3 Connection to the power supply, switching on and off 193
1.4 Adjustments.... 193

2 Installation....198

2.1 General Instructions 198
2.2 Place of installation 198
2.3 Plumbing connections 198
2.4 Gas connection 200
2.5 Electrical connections....200
2.6 Fume ducts....203
2.7 Condensate drain connection....209

3 Service and maintenance....210

3.1 Adjustments....210
3.2 Commissioning....217
3.3 Maintenance....218
3.4 Troubleshooting....221

4 Technical data and characteristics 225

4.1 Dimensions and connections 225
4.2 General view 228
4.3 Hydraulic circuit 228
4.4 Technical data table 229
4.5 Diagrams 233
4.6 Wiring diagram (fig. 46)....233

1. Operating instructions

1.1 Introduction

Dear Customer,

BLUEHELIX MAXIMA is a high-efficiency, low emissions premix condensing heat generator with heat exchanger in s/steel and incorporated DHW production, using natural gas or LPG and equipped with a microprocessor control system.

The sealed chamber unit is suitable for indoor installation or outdoors in a partially protected place (according to EN 15502) with temperatures to -5°C (-15°C with optional frost protection kit).

1.2 Control panel

fig. 1-

1. User menu
2. Connection status
3. Pressure status
4. System pressure
5. ECO mode on/off
6. Date and time
7. Flame present in DHW mode
8. Flame present in Heating mode
9. DHW temperature
   10.Heating temperature
   11.Increase DHW temperature
10. Increase Heating temperature
11. Decrease DHW temperature
12. Decrease Heating temperature
13. Boiler on/off selection
14. Heating on/off selection
    17.Help

Flame status table

A flame not present
B boiler on
C boiler blocked for failed ignition
D calibration in progress

1.3 Connection to the power supply, switching on and off

Boiler not electrically powered

To avoid damage caused by freezing during long idle periods in winter, it is advisable to drain all the water from the boiler.

Boiler electrically powered

Switch on the power to the boiler.

• During the first 5 seconds a screen appears giving the PCB firmware versions at the bottom.
• For the next 300 seconds the screen shows the progress of the heating system air venting cycle.
• At the end of the venting process, check that the gas cock ahead of the boiler is open.

To prevent the air venting cycle during boiler ignition, press and hold the words "BLUEHELIX MAXIMA" (about 10 seconds) until the main screen appears.

Activation of boiler operating modes

Heating can be enabled or disabled using the ON/OFF button (16 in fig. 1). When both are disabled (15 and 16 in fig. 1) the boiler is off but still electrically powered.

With the heating mode deactivated the frost protection function still remains active.

The frost protection system does not work when the power and/or gas to the unit are turned off. To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all water from the boiler, the DHW circuit and the heating system water; or drain just the DHW circuit and add a suitable antifreeze to the heating system, as prescribed in sec. 2.3.

1.4 Adjustments

By touching the control "B" (fig. 2 and fig. 3) it is possible to enable (ON) or disable (DHW)Disabling DHW also automatically inhibits the heating function.

Enable/Disable the heating function

By touching the control “A” (fig. 4 and fig. 5) it is possible to enable (ON) or disable (HEATING).

fig. 4- Heating function active

fig. 5- Heating function not active

DHW temperature adjustment

Use the DHW icons (details 11 and 13 - fig. 6) to adjust the temperature from a min. of 35°C to a max. of 55°C.

If little water is drawn off and/or with a high water inlet temperature, the DHW outlet temperature may differ from the set temperature.

Heating temperature adjustment

Use the heating buttons (details 12 and 14 - fig. 7) to adjust the temperature from a min. of 20^ C to a max. of 80^ C.

fig. 7- Heating adjustment

Room temperature adjustment with timer control

As far as possible, make all settings using the room temperature adjustment device. Regarding the timer, refer to the relevant user manual.

ECO mode

The ECO mode minimizes energy consumption, but it may take longer for the DHW to reach the required temperature.

With the ECO mode disabled, the temperature of water inside the boiler is maintained, thereby ensuring immediate availability of hot water.

Restoring system hydraulic pressure

The boiler provides for various ways of restoring the hydraulic system. pressure. Manual, always available, or semiautomatic or automatic depending on the parameter value P62.

"Pressure control" screen

To access the pressure control screen, simply touch the pressure value (detail 4 - fig. 1) on the main screen.

Description of "Pressure control" screen

fig. 8- Pressure control

Legend fig. 8

1 Back to main screen
2 Pressure status indicator (see attached table)
3 Boiler operating pressure zone
4 Pressure zone too high (boiler blocked)
5 Current pressure indicator
6 Current pressure value
7 Pressure zone too low, boiler operation inhibited
8 Pressure reset button (enabled in semiautomatic mode)
9 Nominal pressure indicator

Icon Fault	code Description
	F40 Pressure too high for boiler operation
RED
	F21	Pressure higher than nominal valueThe boiler works at limited output
YELLOW
	NONE Pressure at nominal value
GREEN
	F20	Pressure lower than nominal valueThe boiler continues to work normally
YELLOW
	F37 Pressure too low for boiler operation
RED

System hydraulic pressure manual reset

The filling pressure read on the boiler water gauge (detail 2 - fig. 9) with system cold must be approx 1.0 bar. The boiler stops if the system pressure drops to values below the minimum. Pull out the filling knob (detail 1 - fig. 9) and turn it anticlockwise to return it to the initial value. Always close it afterwards.

Once the system pressure is restored, the boiler will activate the 300-second air venting cycle, identified on the display with the appropriate sequence of screens.

To prevent boiler shutdown, it is advisable to periodically check the pressure on the gau-

ge with system cold. In case of a pressure below 0.8 bar, it is advisable to restore it.

fig. 9- Filling knob

System semiautomatic pressure restoration (P62 = 0)

In case of low water pressure (indicated by the symbol), access the pressure control screen (fig. 8) and press the "RESTORE" button.

This activates the filling valve until the pressure returns to the nominal value (P57) +0.4 bar.

If the nominal pressure is not reached within a time limit (4 min), a shutdown is generated (A23).

System automatic pressure restoration (P62 = 1)

If the boiler detects a too low system pressure, the filling valve is automatically activated until the nominal value is reached (P57) +0.4 bar.

If the nominal pressure is not reached within a time limit (4 min), a shutdown is generated (A23).

System draining

The drain faucet ring nut is located under the safety valve inside the boiler.

To drain the system, turn the ring (ref. 1 - fig. 10) counter-clockwise to open the faucet. Do not use any tools; use hands only.

To drain only the water in the boiler, first close the shut-off valves between the system and boiler before turning the ring.

Technical line drawing of a mechanical assembly with gears and components (no text or symbols)

fig. 10- Safety valve with drain faucet

Settings menu

1 Back to main screen
2 Faults history
3 Number of faults not read since last access to history
4 Activate screen lock for glass cleaning
5 Current language
6 Language selection
7 Display behavior management
8 LED behavior management
9 Set date and time
10 Probe and sensor information
11 Boiler reset
12 Installer menu

2. Installation

2.1 General Instructions

BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NATIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.

2.2 Place of installation

The combustion circuit is sealed with respect to the place of installation and therefore the unit can be installed in any room except in a garage. The place of installation must be sufficiently ventilated to prevent the creation of dangerous conditions in case of even small gas leaks. Otherwise there may be a risk of suffocation and intoxication or explosion and fire. This safety precaution is required by EEC Directive No. 2009/142 for all gas units, including so-called sealed chamber units.

The unit is designed to operate in a partially protected place, with a minimum temperature of -5^ . If provided with the special antifreeze kit, it can be used with a minimum temperature down to -15^ . The boiler must be installed in a sheltered place, for instance under the slope of a roof, inside a balcony or in a protected recess.

The place of installation must be free of flammable materials, objects and dusts or corrosive gases.

The boiler is arranged for wall mounting and comes as standard with a hooking bracket. Wall fixing must ensure stable and effective support for the generator.

If the unit is enclosed in a cabinet or mounted alongside, there must be sufficient space for removing the casing and for normal maintenance activities

2.3 Plumbing connections

Important

The safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the floor in case of overpressure in the heating circuit. Otherwise, if the discharge valve cuts in and floods the room, the boiler manufacturer cannot be held liable.

Before installation, flush all the pipes of the system thoroughly to remove any residuals or impurities that could affect proper operation of the unit.

In case of replacement of generators in existing installations, the system must be completely emptied and cleaned of any sludge and pollutants. For that purpose only

use suitable guaranteed products for heating systems (see next section), that do not harm metals, plastics or rubber. The manufacturer declines any liability for damage caused to the generator by failure to properly clean the system.

Make the connections to the respective points (see fig. 38, fig. 39 and fig. 40) and to the symbols given on the unit.

Antifreeze system, antifreeze fluids, additives and inhibitors

When necessary, antifreeze fluids, additives and inhibitors can be used only if the manufacturer of such fluids or additives guarantees that they are suitable and do not cause damage to the exchanger or other components and/or materials of the boiler and system. Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in heating systems and compatible with the materials of the boiler and system.

System water characteristics

BLUEHELIX MAXIMA boilers are suitable for installation in heating systems with non-significant entry of oxygen (ref. systems "case I" EN14868). A physical separator (e.g. plate heat exchanger) must be provided in systems with continuous entry of oxygen (e.g. underfloor systems without antidiffusion pipes or open vessel), or intermittent (less than 20% of system water content).

The water within a heating system must have the characteristics required by UNI 8065, and comply with laws and regulations in force and the provisions of EN14868 (protection of metallic materials against corrosion).

The filling water (first filling and subsequent replenishment) must be clear, with hardness below 15^ F and treated with suitable chemical conditioners against the initiation of corrosion, that are not aggressive on metals and plastics, do not develop gases and, in low-temperature systems, do not cause proliferation of bacterial or microbial masses.

The water in the system must be periodically checked (at least twice a year during the season when the systems are used, as required by UNI8065) and have: possibly a clear appearance, hardness below 15^ F for new systems or 20^ F for existing systems, pH above 7 and below 8.5, iron content (Fe) below 0.5 mg/l, copper content (Cu) below 0.1 mg/l, chloride content below 50mg/l, electrical conductivity below 200 s/cm, and must contain chemical conditioners in a concentration sufficient to protect the system for at least one year. Bacterial or microbial loads must not be present in low temperature systems.

Only use conditioners, additives, inhibitors and antifreeze liquids declared by the producer suitable for use in heating systems and that do not cause damage to the heat exchanger or other components and/or materials of the boiler and system.

Chemical conditioners must ensure complete deoxygenation of the water, contain specific protection for yellow metals (copper and its alloys), anti-fouling agents for scale, neutral pH stabilizers and, in low-temperature systems, specific biocides for use in heating systems.

Recommended chemical conditioners:

SENTINEL X100 and SENTINEL X200

FERNOX F1 and FERNOX F3

The unit is equipped with a frost protection system that activates the boiler in heating mode when the system delivery water temperature falls below 6^ C. The device is not active if the power and/or gas supply to the unit is turned off. If necessary, for system protection use a suitable antifreeze liquid that meets the same requirements as set out above and provided for by Standard UNI 8065.

In the presence of adequate chemical/physical system and feed water treatments and related high cyclicity controls able to ensure the required parameters, for industrial process applications the product can be installed in open-vessel systems with vessel hydrostatic height able to ensure compliance with the minimum operating pressure indicated in the product technical specifications.

The presence of deposits on the boiler exchange surfaces due to non-compliance with the above requirements will involve non-recognition of the warranty.

Frost protection kit for outdoor installation (optional - 013022X0)

In case of installation outdoors in a partially protected place, for temperatures below -5^ and down to -15^ , the boiler must be fitted with the special frost protection kit. For proper installation, please refer to the instructions in the kit.

2.4 Gas connection

Before making the connection, ensure that the unit is arranged for operation with the type of fuel available.

The gas must be connected to the corresponding union (see fig. 38) in conformity with current regulations, with a rigid metal pipe or with a continuous flexible s/steel tube, installing a gas cock between the system and boiler. Make sure that all the gas connections are tight. Otherwise there may be a risk of fire, explosion or suffocation.

2.5 Electrical connections

IMPORTANT

BEFORE CARRYING OUT ANY OPERATION THAT RE- QUIRES REMOVING THE CASING, DISCONNECT THE BOILER FROM THE ELECTRIC MAINS WITH THE MAIN SWITCH.

NEVER TOUCH THE ELECTRICAL COMPONENTS OR CONTACTS WITH THE MAIN SWITCH TURNED ON! DANGER OF ELECTRIC SHOCK WITH RISK OF INJURY OR DEATH!

The unit must be connected to an efficient grounding system in accordance with applicable safety regulations. Have the efficiency and suitability of the grounding system checked by professionally qualified personnel; the Manufacturer declines any liability for damage caused by failure to earth the system.

The boiler is prewired and provided with a three-pole cable, without a plug, for connection to the electric line. The

connections to the grid must be made with a permanent connection and equipped with a bipolar switch whose contacts have a minimum opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. Make sure to respect the polarities (LINE: brown wire / NEUTRAL: blue wire / GROUND: yellow-green wire) in the connections to the electric line.

The unit's supply cable MUST NOT BE REPLACED BY THE USER. If the cable gets damaged, turn the unit off and have the cable replaced only by professionally qualified personnel. In case of replacement, only use cable “HAR H05 VV-F” 3x0.75 mm2 with max. external diameter of 8 mm.

Room thermostat

ATTENTION: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CONTACTS. CONNECTING 230V TO THE ROOM THERMOSTAT TERMINALS WILL PERMA-NENTLY DAMAGE THE PCB.

When connecting a time control or timer, do not take the power supply for such devices from their cutoff contacts. Their power supply must be via a direct connection from the grid or with batteries, depending on the kind of device.

Accessing the electrical terminal block

The terminal block can be accessed by following the instructions given below (fig. 12 and fig. 13). The arrangement of terminals for the various connections is given in the wiring diagram in fig. 46.

The terminals must be with voltage-free contacts (not 230V).

Technical line drawing of a mechanical device with multiple ports and mounting brackets (no text or symbols)

fig. 12

Diagram of a mechanical assembly with a spring-loaded component and directional arrows indicating motion (no text or symbols)

fig. 13

Terminal block auxiliary input configuration

Table 1- Auxiliary input settings

DHW configuration Parameter b06
b01 = RRT	b06=0 Contact open disables DHW and re-enables it if closed.
	b06=1 If the contact is open, it disables heating and displays F50. Contact closed enables heating.
	b06=2 The contact acts as a room thermostat.
	b06=3 If the contact is open, it displays F51 and the boiler continues to work. It is used as an alarm.
	b06=4 The contact functions as a limit thermostat, if open it displays F53 and deactivates the request.

2.6 Fume ducts

THE BOILERS MUST BE INSTALLED IN ROOMS THAT MEET THE FUNDAMENTAL VENTILATION REQUIREMENTS. OTHERWISE THERE IS DANGER OF SUFFOCATION OR INTOXICATION. READ THE INSTALLATION AND MAINTENANCE INSTRUCTIONS BEFORE INSTALLING THE UNIT. ALSO FOLLOW THE DESIGN INSTRUCTIONS. IN CASE OF PRESSURES ABOVE 200 Pa INSIDE THE FUME EXHAUST PIPES, CLASS "H1" FLUES MUST BE USED.

Important

The unit is “type C” with sealed chamber and forced draught; the air inlet and fume outlet must be connected to one of the following extraction/suction systems. Before installation, check and carefully observe the above prescriptions. Also, comply with the provisions concerning the positioning of wall and/or roof terminals and the minimum distances from windows, walls, vents, etc.

Installation type C10

In case of flues under pressure in a collective flue, before installation and at subsequent maintenance operations, close the fume discharge duct coming from the flue. OTHERWISE THERE IS DANGER OF SUFFOCATION DUE TO PRODUCTS OF COMBUSTION ESCAPING INTO THE BOILER ROOM.

Installation of the boiler according to type C10 must be carried out by specialist personnel doing the calculations required by current regulations in compliance with the maximum positive pressure of the flue and the boiler.

Connection with coaxial pipes

graph TD
    A["C1x"] --> B["C3x"]
    B --> C["C3x"]
    C --> D["C3x"]
    D --> E["C3x"]
    E --> F["C1x"]
    F --> G["C1x"]
    G --> H["C1x"]
    H --> I["C1x"]
    I --> J["C1x"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style D fill:#f9f,stroke:#333
    style E fill:#f9f,stroke:#333
    style F fill:#f9f,stroke:#333
    style G fill:#f9f,stroke:#333
    style H fill:#f9f,stroke:#333
    style I fill:#f9f,stroke:#333
    style J fill:#f9f,stroke:#333

fig. 14 - Examples of connection with coaxial pipes (≡ Air / = Frames)

For coaxial connection, fit the unit with one of the following starting accessories. For the wall drilling dimensions refer to the figures fig. 39, fig. 40 and fig. 41. Any horizontal sections of the fume exhaust must be kept sloping slightly towards the boiler, to prevent possible condensate from flowing back towards the outside and causing dripping.

fig. 15- Starting accessories for coaxial ducts

Table 2- Max. length coaxial ducts

	Coaxial 60/100 Coaxial 80/125
Max. permissible length (horizontal) 7 m		20 m
Max. permissible length (vertical) 8 m
Reduction factor 90° bend 1 m 0.5 m
Reduction factor 45° bend 0.5 m 0.25 m

Connection with separate pipes

fig. 16- Examples of connection with separate pipes (= Air / = Frames)

Table 3 - Typology

Type Description
C1X	Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be undergo similar wind conditions (within 50 cm)
C3X Roof vertical exhaust and intake. Inlet/outlet terminals like for C12
C5X	Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust and intake must not be positioned on opposite walls.
C6X Intake and exhaust with separately certified pipes (EN 1856/1)
B2X Intake from installation room and wall or roof exhaustIMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION

For the connection of separate ducts, fit the unit with the following starting accessory:

fig. 17- Starting accessory for separate ducts

Before installation, make sure the maximum permissible length has not been exceeded by means of a simple calculation:

1. Establish the layout of the system of split flues, including accessories and outlet terminals.
2. Consult table 5 and identify the losses in m_eq (equivalent meters) of every component, according to the installation position.
3. Check that the sum total of losses is less than or equal to the maximum permissible length in table 4.

Table 4- Max. length separate ducts

Max. permissible length BLUEHELIX MAXIMA 24C80 m_eq

BLUEHELIX MAXIMA 28C and BLUEHELIX MAXIMA 34C70 m_eq

Table 5- Accessories

				Losses in m_eq
				Air intake	Fume exhaust
					Vertical Horizontal
∅ 80	PIPE 1	m M/F 041104X0 1.0 1.6 2.0
	BEND 4	5° M/F 041103X0 1.2 1.8
		90° M/F 041102X0 1.5 2.0
	PIPE SECTION with test point 1KWMA70W 0.3 0.3
	TERMINAL air, wall 1KWMA85A 2.0 -
			fumes, wall with antiwind 1KWMA86A - 5.0
	FLUE	Split air/fumes 80/80	010027X0	-	12.0
		Fume outlet only ∅80	010026X0 + 1KWMA86U	-	4.0
∅ 60	PIPE 1	m M/F 1KWMA89W		6.0
	BEND 9	0° M/F 1KWMA88W		4.5
	REDUCER	80/60	041050X0		5.0
	TERMINAL	fumes, wall with antiwind	1KWMA90A		7.0
∅ 50	PIPE 1	m M/F 041086X0		12
	BEND	90° M/F	041085X0		9
	REDUCER	80/50	041087X0		10
		ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF ∅50 and ∅60 ACCESSORIES; USE THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.

Use of ∅50 and ∅60 flexible pipe (for ducting only)

The chart includes the starting accessories code 041087X0 for ∅50 and code 041050X0 for ∅60. Up to 4 m. of ∅80 mm flue can be used between the boiler and the passage with reduced width (∅50 or ∅60), and up to 4 m. of ∅80 mm flue on the intake (with max. length of ∅50 and ∅60 flues).

fig. 18

A = BLUEHELIX MAXIMA 24C

∅50 - 28 m MAX

∅60 - 78 m MAX

BLUEHELIX MAXIMA 28C

∅50 - 22 m MAX

∅60 - 60 m MAX

BLUEHELIX MAXIMA 34C

∅50 - 17 m MAX

∅60 - 45 m MAX

To use this width, follow the instructions below.

Enter the menu SC (follow the instructions given in par. "Combustion Control Menu" on page 216) and set the parameter SC04 to the value corresponding to the length of flue used.

For model BLUEHELIX MAXIMA 24C/ For model BLUEHELIX MAXIMA 28C/ For model BLUEHELIX MAXIMA 34C

fig. 19- Chart for flue parameter choice

Connection to collective flues

fig. 20- Examples of connection to collective flues (= Air / = Frames)

fig. 21- Connection examples - system C10 and C11 (= Air / = Frames)

Table 6- Typology

Type Description
C10	Unit connected through its ducts to a system of common flue pipes under pressure obtained in the structure
C11 Unit	connected through its ducts to a system of common flue pipes under pressure
C2X Intake and exhaust in common flue (intake and exhaust in same flue)
C4X	Intake and exhaust in common and separate flues, but undergoing similar wind conditions
C8X Exhaust in single or common flue and wall intake
B3X	Intake from installation room by means of concentric duct (that encloses the exhaust) and exhaust in common flue with natural draftIMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
C93 Exhaust to a vertical terminal and intake from existing flue.

If the boiler is to be connected BLUEHELIX MAXIMA to a collective flue or to a single flue with natural draft, the flue or chimney must be expressly designed by professionally qualified technical personnel in conformity with current regulations and be suitable for sealed chamber units equipped with fan.

ONLY FOR THE ITALIAN MARKET

According to Art. 5 Para. 2, f) and g) of Min. Decree 37/08, gas systems, chimneys, flues and smoke systems with a capacity of over 50 kW and in any case all multiple flues installed in Italy must be designed by a Professional registered in the appropriate professional registers.

Backflow preventer valve

The boiler BLUEHELIX MAXIMA is equipped as standard with a backflow preventer valve (anti-backflow system), therefore it can be connected to a positive pressure collective flue system, only if using G20 gas.

In case of C10-type boiler installation, apply the relevant white adhesive plate (included in the document bag supplied with the unit) in a CLEARLY VISIBLE PLACE on the FRONT PANEL.

After installation, check the tightness of the fumes and gas circuit.

OTHERWISE THERE IS DANGER OF SUFFOCATION DUE TO THE EMISSION OF COMBUSTION FUMES.

2.7 Condensate drain connection

IMPORTANT

The boiler has an internal trap for draining condensate. Install the hose “B” by pressing it into place. Before commissioning, fill the trap with approx. 0.5 L of water and connect the hose to the disposal system.

Drains connected to the drainage system must be resistant to acidic condensate.

If the condensate drain is not connected to the waste water drainage system, a neutralizer must be installed.

ATTENTION: THE UNIT MUST NEVER BE OPERATED WITH THE TRAP EMPTY!

OTHERWISE THERE IS A DANGER OF SUFFOCATION DUE TO THE EMISSION OF COMBUSTION FUMES.

THE CONDENSATE DRAIN MUST BE CONNECTED TO THE DRAINAGE SYSTEM IN SUCH A WAY THAT THE LIQUID CONTAINED CANNOT FREEZE.

fig. 22- Condensate drain connection

3. Service and maintenance

3.1 Adjustments

Gas conversion

The unite can use gas of the 2^nd or 3^rd family as clearly indicated on the packaging and on the unit's technical data plate. If the unit has to be used with a gas other than the factory-set one, proceed as follows:

1. Disconnect the power supply and turn off the gas.
2. Remove the front panel (see *** 'Opening the front panel' on page 219 ***)
3. Turn the Throttle (fig. 23) according to the position indicated in table 7.
4. Apply the plate for LPG (contained in the document bag) near the technical data plate.
5. Refit the front panel and turn on the power to the boiler.

6. Modify the parameter for the type of gas:

7. Access the user menu

8. Access the [ service menu] and press confirm
9. Enter the password "1234" and confirm []
10. Select [Combustion Control]
11. select the parameter [1/Gas type selection]
12. Press [OK]
13. Confirm the parameter change by touching [Confirm]
14. Exit the service menu by touching the Home icon
    • The fan will start for about 20 seconds
15. Open the gas

- Choose the correct type of gas according to table 7 then, from the menu, select the corresponding parameter [NG/LPG]

7. MAKE SURE THE FRONT CASING IS CLOSED AND THE INTAKE/FUME EXHAUST DUCTS ARE COMPLETELY ASSEMBLED

Put the boiler in heating or DHW mode for at least 2 minutes. During this period the boiler performs a calibration and the flame symbol flashes on the display. The end of calibration is indicated by the flame symbol steady on the display.

Check the combustion values (see following par.).

Table 7- THROTTLE position and parameter setting

Gas family	Gas type	Throttle position	Parameter
2^nd	G20 - G25 - G27 - G25.1 - G25.3 1	N	G
2^nd	G230 1 L	P	G
3^rd family	G30 - G31 2 L	P	G

fig. 23

Checking the combustion values

MAKE SURE THE FRONT CASING IS CLOSED AND THE INTAKE/FUME EXHAUST DUCTS ARE COMPLETELY ASSEMBLED.

1. Put the boiler in heating or DHW mode for at least 2 minutes. During this period if the flame symbol flashes on the display, it means that the boiler is performing a calibration. Wait until the flame becomes steady (end of calibration).
2. Activate the TEST mode (see *** 'TEST mode activation' on page 212 **).
3. By means of a combustion analyzer, connected to the points located on the starting accessories above the boiler, check that the CO2 content in the fumes, with boiler working at maximum and minimum output, matches that given in the following table.

Case studies G20 G30/G31 G230
A	New boiler (first ignition/conversion or electrode replacement)	7.5%-9.9%	9%-11.5%	9%-11.5%
B Boiler with at least 500 hours of operation 9%+/-0.8 10%+/-0.8 10%+/-0.8

1. If the combustion values do not match, do the 100% calibration as described in the following paragraph.
2. If the values still do not match, do not activate other calibrations as the system needs to work longer to be able to self-adapt.

100% calibration

IMPORTANT: DURING THE AUTOMATIC CALIBRATION PROCEDURE AND CHECK OF THE CO₂ VALUE, THE FRONT CASING OF THE BOILER MUST BE CLOSED AND THE INTAKE/FUME EXHAUST DUCTS COMPLETELY ASSEMBLED.

100% calibration, automatic

Automatic calibration can take place in some cases in the absence of a DHW or heating demand or after a reset due to a fault and is indicated on the display by the flashing flame symbol.

100% calibration, manual

Calibration procedure.

• Put the boiler (preferably) in heating mode or else in DHW mode.
• Access the user menu
• Access the [ service menu] and press confirm
• Enter the password "1234" and confirm [] √
• Select [Combustion Control]
• Select the parameter [15/100% Calibration]
• Enter "1"
• Press OK to confirm
• The main screen will appear with the flashing flame icon until the end of calibration.

Loading parameters with "BCC KEY"

The “BCC KEY” device allows the updating of combustion parameters for boiler type.

It is used in case of replacement of the PCB of some boiler models.

To use the "BCC KEY", refer to the instructions contained in the kit.

TEST mode activation

• Access the [ service menu] and press confirm
• Enter the password "1234" and confirm [] √
• Press [Test Mode]. The display shows the operating information.
• Burner power can be increased or decreased by touching [+] and [-] .
• Wait about 1 minute for the values to stabilize

Test mode remains active as long as the user stays on the corresponding screen. It is automatically deactivated on exiting the screen or after 20 minutes of user inactivity.

Heating power adjustment

To adjust the heating power, switch the boiler to TEST mode (see sec. 3.1) Touch the buttons [+] or [-] to increase or decrease the power (minimum = 00 - Maximum = 100). If confirmed with the button [Store] within 5 seconds, the maximum power will remain that just set. Exit TEST mode (see sec. 3.1).

Service menu

ONLY QUALIFIED PERSONNEL CAN ACCESS THE SERVICE MENU AND MODIFY PARAMETERS.

The service menu is accessed via the main user menu (detail 1 fig.1).

1. Access the main user menu
2. Press [Service menu]
3. Confirm the desire to proceed by touching [Confirm]
4. Use the keypad that appears on the screen to enter pin 1234 and touch the confirm button

Description of SERVICE MENU screen

The values of the sensors and actuators in the boiler are available.

Note: To return to the Service Menu, touch the arrow at the top left of the screen

Description Range
Combustion
Burner power 00%=Min., 100%=Max.
Flame status 00÷255
Fan rpm 00÷120
Operating hours 00÷99
Fume Temperature 0÷125 °C
Hydraulics
Heating Flow 0÷125 °C
Heating Return 0÷125 °C
NTC DHW sensor (°C) 0÷125 °C
DHW draw-off 00÷99 L/min
Modulating pump speed 00÷100%
System water pressure 00-9.9 bar with pressure transducer
Environment
External probe +70 ÷ -30°C

Transparent Parameters "B" menu

By selecting a parameter on the screen, the possible values will be shown. If the values shown do not match those indicated in the corresponding "Range" column, check that the parameter B01 is correctly set to RRT.

Code	Description	Range	Default
B01	Boiler type selection	RRP (INSTANTANEOUS COMBI)RRH (HEATING ONLY also with OPTIONAL HOT WATER STORAGE TANKRRT (COMBI HEATING ONLY)RRK (HEATING ONLY with HOT WATER STORAGE TANK)	RRT
B02	Exchanger type	1 ÷ 4	BLUEHELIX MAXIMA 24C = 1BLUEHELIX MAXIMA 28C = 2BLUEHELIX MAXIMA 34C = 3
B03	Absolute Maximum Heating Power	0 ÷ 100% (Do not modify the value)	BLUEHELIX MAXIMA 24C = 75%BLUEHELIX MAXIMA 28C = 85%BLUEHELIX MAXIMA 34C = 85%
B04	System water pressure protection selection	Pressure switchPressure Transducer	Pressure transducer
B05	NOT IMPLEMENTED		--
B06	Variable input contact operation selection	Flow meter exclusionSystem thermostatSecond room therm.Warning/AlertSafety thermostat	Second room thermostat
B07	Relay card LC32 selection	External gas valveAlarmSystem filling solenoid valveSolar 3-way valveSecond heating pumpAlarm2Burner litFrost protection active	System filling solenoid valve
B08	Hours without DHW draw-off	0 ÷ 24 hours (time for temporary deactivation of comfort mode without draw-off)	24
B09	Fault 20 status selection	DeactivatedEnabled	Enabled
B10	Not implemented -- --
B11	Flowmeter timing	Deactivated 1s ÷ 10s (seconds)	Deactivated
B12	Modulation Delta 0 ÷ 30^/10	0^/10
B13	Not implemented -- --
B14	Pump antiblock operation time	0 ÷ 20 seconds 5
B15	Flowmeter type selection	Flow. (450 imp/l)Flow. (700 imp/l)Flow (190 imp/l)	Flow (190 imp/l)
B16	Fan frequency in standby mode	0 ÷ 100% 0%
B17	NOT IMPLEMENTED --
B18	DHW mode activation flow rate	0 ÷ 100L/min/10 25
B19	DHW mode deactivation flow rate	0 ÷ 100L/min/10 20
B20	Flue material selection	0 = Standard 1 = PVC 2 = CPVC	0
B21	PVC flue maximum temperature	60 ÷ 110^ 88^
B22	CPVC flue maximum temperature	60 ÷ 110^ 93^
B23	Standard flue shutdown maximum temperature	60 ÷ 110^ 100^
B24	PVC flue shutdown maximum temperature	60 ÷ 110^ 93^
B25	CPVC flue shutdown maximum temperature	60 ÷ 110^ 98^
B26	Flow temperature limit in automatic calibration	25^ ÷ 55^ 30^
B27	Maximum temperature during calibration in DHW mode	75^ ÷ 95^ 80^
B28	Flowmeter sensitivity factor 0	60 (0 = disabled) 20
B29	Restoring Factory Values	Set the value to 10	-

Notes:

1. Parameters with more than one description vary their function and/or range in relation to the setting of the parameter given in brackets.
2. Parameters with more than one description are reset to the default value if the parameter given in brackets is modified.
3. The Maximum Heating Power parameter can also be modified in Test Mode.

To return to the service menu, touch the arrow at the top left of the screen.

Transparent Parameters "P" menu

By selecting a parameter on the screen, the possible values will be shown. If the values shown do not match those indicated in the corresponding "Range" column, check that the parameter B01 is correctly set to RRT.

Code	Description	Range	Default
P30	Heating ramp	1 ÷ 20^/minute	4^/minute
P31	Virtual set point min. temperature	0= Deactivated 1 ÷ 80^	0
P32	Heating standby time 0 ÷ 10 minutes 4
P33	Heating Post-Circulation 0 ÷ 25 minutes 15
P34	Pump operation	Fixed flow rate on callFixed continuous flow rateAdaptive flow rate on callAdaptive continuous flow rate	Adaptive flow rate on call
P35	Modulating pump min. speed	30 ÷ 100% 30%
P36	Modulating pump start speed	90 ÷ 100% 90%
P37	Modulating pump max. speed	90 ÷ 100% 100%
P38	Pump deactivation temperature during Post-Circulation	0 ÷ 100°C 55°C
P39	Pump activation hysteresis temperature during Post-Circulation	0 ÷ 100°C 25°C
P40	Heating user max. setpoint 20	÷ 90°C 80°C
P41	Max. output in heating 0 ÷ 100% 80%
P42	Burner shutdown in DHW	FixedLinked to setpointSolar	Fixed
P43	Comfort mode activation temperature	0 ÷ 80°C 40°C
P44	Comfort mode deactivation hysteresis	0 ÷ 20°C 20°C
P45	DHW standby time 30 ÷ 255 seconds 120
P46	DHW user max. setpoint 40 ÷ 70°C 55°C
P47	DHW pump Post-Circulation	0 ÷ 255 seconds	30
P48	Max. output in DHW	0 ÷ 100%	BLUEHELIX MAXIMA 24C = 86%BLUEHELIX MAXIMA 28C = 100%BLUEHELIX MAXIMA 34C = 100%
P49	Not implemented	--	--
P50	Not implemented	--	--
P51	olar off temperature 0 ÷ 100°C 10°C
P52	olar on temperature 0 ÷ 100°C 10°C
P53	Solar standby time	0 ÷ 255 seconds	10
P54	Heating deltaT adjustment temperature	0 ÷ 60°C 18°C
P55	Primary exchanger protection temperature	0 ÷ 150°C 43°C
P56	System min. pressure value	0 ÷ 8bar/10	4 bar/10
P57	System nominal pressure value	5 ÷ 20bar/10	7 bar/10
P58	Exchanger protection intervention (b01=3)	0 = No F431 ÷ 15 = 1 ÷ 15°C/second	10°C/second
P59	Heating hysteresis after ignition	6 ÷ 30°C 10°C
P60	Timer for heating hysteresis after ignition	60 ÷ 180 seconds 60
P61	Pump deactivation with OpenTherm	0 ÷ 1	0
P62	System filling mode	ManualAutomatic	Manual

Notes:

1. Parameters with more than one description vary their function and/or range in relation to the setting of the parameter given in brackets.

2. Parameters with more than one description are reset to the default value if the parameter given in brackets is modified.

3. The Maximum Heating Power parameter can also be modified in Test Mode.

To return to the service menu, simply touch the "arrow" icon in the top left corner of the screen.

Combustion Control Menu

ONLY QUALIFIED PERSONNEL CAN ACCESS THE MENU AND MODIFY THE RELEVANT PARAMETERS.

Code	Description	Functional description	Range	Default
Sc01 Gas type selection		Allows the change of gas type. See “Gas conversion” on page 210	NG/LPG NG
Sc02 Ignition gas calibration		Allows the amount of gas to be increased or decreased in the ignition phase in case of difficult starting.	-9 ÷ 20 0
Sc03 Ignition power		Allows the fan speed to be increased or decreased in the ignition phase in case of difficult starting.	-16 ÷ 14 0
Sc04 Flue length		Allows the boiler to be arranged according to the width and length of the flue used. To be used only with ∅50 or ∅60 flues. See fig. 19.	-2 ÷ 13 0
Sc05 Minimum power calibration		Allows the minimum power to be increased, if necessary.	0 ÷ 25 0
Sc06	Minimum gas valve calibration	Self-adaptive parameter. DO NOT MODIFY.
Sc07 Flame ionization signal Displays the actual ionization current signal. Read only
Sc08 Current power ref. DHW		Displays the actual power referred to maximum power in DHW.	Read only
Sc09	MAX ionization value	Displays the maximum ionization value reached.	Read only
Sc10 Minimum ionization value during ignition		Displays the minimum ionization value reached during the ignition phase.	Read only
Sc11	Ignition time	Displays the time from fan activation to ionization.	Read only
Sc12*	Ionization reduction value (BASE)	NOT MODIFIABLE	Read only	0
Sc13**	Ionization reduction value (min.)	NOT MODIFIABLE	Read only	0
Sc14	Internal error K1	Displays the SCOT system error code.	Read only
Sc15 100% CALIBRATION		Allows 100% Calibration (see “100% calibration” on page 211) in case of replacement of several components	0 - 1	0

ZTP (Sliding temperature) Parameters Menu

When the external probe is installed, the boiler adjustment system works with "Sliding Temperature". In this mode, the heating system temperature is regulated according to weather conditions, to ensure high comfort and energy efficiency throughout the year. In particular, as the outside temperature increases the system flow temperature decreases according to a specific "compensation curve".

With Sliding Temperature adjustment, the temperature set using the buttons [+] (detail 12 fig.1) and [-] (detail 14 fig.1) becomes the maximum system flow temperature. It is advisable to set a maximum value to allow system adjustment throughout its useful operating range.

The boiler must be adjusted at the time of installation by qualified personnel. However, the user can make any further adjustments necessary to optimize comfort levels.

Compensation curve and curve offset

The settings of the compensation curves and relevant offset can be accessed via the service menu and touching the item [ZTP parameters]. Use fig. 25 as a reference for choosing the value of curve-type parameters and fig. 26 as a reference for choosing the value of offset-type parameters.

If the room temperature is lower than the required value, it is advisable to set a higher order curve and vice versa. Proceed by increasing or decreasing in steps of one and check the result in the room.

If the "Shutdown outside temperature" function is set to 0 it is disabled. If the value is set from 1 to 40^ it is active. Ignition occurs when the temperature of the outside probe is 2^ lower than the set temperature.

fig. 25- Compensation curves

fig. 26- Example of compensation parallel curve offset

Faults history

The card can store the last 10 faults. The fault code and a brief description are shown for each fault.

Faults History Reset

The list of faults recorded by the card can be cleared by touching the item [Faults history reset] and after confirming and entering the password "1234".

3.2 Commissioning

Before turning on the boiler

• Check the tightness of the gas system.
• Before filling the system, check the correct expansion vessel precharge.
• Fill the hydraulic system and make sure all air contained in the boiler and the system has been vented.
• Make sure there are no water leaks in the system, DHW circuits, connections or boiler.
• Make sure there are no flammable liquids or materials near the boiler.
• Check correct connection of the electrical system and efficiency of the grounding system.
• Make sure the gas valve is set for the gas to be used (see ***' - THROTTLE position and parameter setting' on page 210 *** - cap. 3.1 "Adjustments").
• Fill the trap (see cap. 2.7 "Condensate drain connection").

IF THE ABOVE INSTRUCTIONS ARE NOT OBSERVED THERE MAY BE RISK OF SUFFOCATION OR POISO-

NING DUE TO GAS OR FUMES ESCAPING; DANGER OF FIRE OR EXPLOSION. ALSO, THERE MAY BE A RISK OF ELECTRIC SHOCK OR FLOODING THE ROOM.

First boiler ignition

• Make sure there is no draw-off of hot water and room thermostat requests.
• Turn on the gas and check that the gas supply pressure ahead of the unit complies with the technical data table or in any case the tolerance provided for by the regulations.
• Power the boiler electrically, the FW and software version number appear on the display. Then the message "boiler start" appears with the timers indicating the progress of deaeration (see cap. 1.3 "Connection to the power supply, switching on and off" on page 193).
• At the end of the FH cycle, the display will show the winter mode screen, make the temperature adjustments: heating flow and DHW outlet (fig. 7 and fig. 6).
• Check if the flue parameter value (“Combustion Control Menu” on page 216) is suitable for the length of flue installed.
• In case of gas change (G20 - G30 - G31), check if the relevant parameter is suitable for the type of gas present in the supply system ("Combustion Control Menu" on page 216 and cap. 3.1 "Adjustments" on page 210).
• Set the boiler to DHW or heating mode (see cap. 1.3 "Connection to the power supply, switching on and off" on page 193).
• In heating mode, do a request: the current heating system temperature is shown on the display; when the flashing flame symbol appears it means that the burner is on and the system is calibrating. Wait for the end of calibration, indicated by the steady flame symbol.
• DHW mode with hot water draw-off present: the current DHW temperature is shown on the display; when the flashing flame symbol appears it means that the burner is on and the system is calibrating; wait for the end of the calibration which will be indicated with the steady flame symbol.
• Carry out the fuel check as described in par. "Checking the combustion values" on page 211.

3.3 Maintenance

IMPORTANT

ALL MAINTENANCE WORK AND REPLACEMENTS MUST BE CARRIED OUT BY SKILLED QUALIFIED PERSONNEL.

Before carrying out any operation inside the boiler, disconnect the power and close the gas cock upstream. Otherwise there may be a danger of explosion, electric shock, suffocation or poisoning.

Opening the front panel

Some internal components of the boiler can reach temperatures high enough to cause severe burns. Before carrying out any operation, wait for these components to cool or else wear suitable gloves.

To open the boiler casing, follow the sequence.

On this unit, the casing also acts as a sealed chamber. After any operation involving opening the boiler, carefully check the correct refitting of the front panel and its seal.

Periodical check

To ensure proper operation of the unit over time, have qualified personnel carry out a yearly inspection, providing for the following checks:

• The control and safety devices (gas valve, flow meter, sensors, etc.) must function correctly.
• The fume exhaust circuit must be perfectly efficient.
• The sealed chamber must be tight.
• The air-fume end piece and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. Use suitable brushes for cleaning. Never use chemical products.
• The electrode must be properly positioned and free of any deposits.

The electrode can be cleaned of incrustations only with a non-metallic brush, and must NOT be sanded.

• The gas and water systems must be tight.
• The water pressure in the system when cold must be approx. 1 bar; otherwise bring it to that value.
• The circulating pump must not be blocked.
• The expansion vessel must be filled.
• The gas flow and pressure must match that given in the respective tables.
• The condensate evacuation system must be efficient with no leakage or obstructions.
• The trap must be full of water.
• Check the quality of the water in the system.
• Check the condition of the insulation of the exchanger.
• Check the gas connection between the valve and Venturi.
• Replace the burner gasket if damaged.
• After the check, always control the combustion parameters (see "checking the combustion values").

Cleaning the exterior surfaces

So as not to alter the opacity of the painted plastic panel (ref. A fig. fig. 32) use mild degreasers that do not contain Mek or aggressive alcohols.

To clean the glass panel (ref. B fig. fig. 32), use isopropyl alcohol.

To clean the side panels (ref. C fig. fig. 32), use a mild detergent.

fig. 32

3.4 Troubleshooting

Diagnostics

During operation, the unit can generate two types of faults:

Type F They indicate the presence of a temporary fault. They are not indicated, but are recorded in the Service Menu faults history. If a type F fault is not resolved independently according to specific safety criteria, it becomes a type A fault.

Type A They indicate the presence of a blocking fault that requires user intervention to be resolved. They are indicated by lighting up of the red LEDs, the appearance of a specific window on the screen, and by the presence of a red dot on the main menu icon.

Unblocking the boiler with type A fault in progress

When a type A fault is present, the boiler can be unblocked in two ways:

1 - Touching [RESET] when a screen similar to that shown in fig. 33 appears.
2 - Touching the main menu icon and then [Boiler Reset] when a screen similar to that shown in fig. 34 (main menu icon with red dot) appears.

1

fig. 33

2

fig. 34

Table of faults

Table 8- List of faults

Fault code Fault Possible cause Cure
A01 No burner ignition		No gas	Check the regular gas flow to the boiler and that the air has been eliminated from the pipes
		Ignition/detection electrode fault	Check the wiring of the electrode and that it is correctly positioned and free of any deposits; replace the electrode if necessary.
		Faulty gas valve Check the gas valve and replace it if necessary
		Insufficient gas supply pressure	Check the gas supply pressure
		Trap blocked Check the trap and clean it if necessary
		Air/fume ducts obstructed	Remove the obstruction from the flue, fume extraction ducts, air inlet and terminals.
A02	Flame present signal with burner off	Electrode fault	Check the ionization electrode wiring
			Check the condition of the electrode
			Electrode to ground
			Cable to ground
			Check the trap and clean it if necessary
		Card fault Check the card
A05 Fan fault		No 230V power supply	Check the 5-pin connector wiring
		Tachometric signal interrupted
		Fan damaged Check the fan
A06	No flame after the ignition phase	Ionization electrode fault Check the position of the ionization electrode and replace it if necessary
		Flame unstable Check the burner
		air/fume ducts obstructed	Remove the obstruction from the flue, fume extraction ducts, air inlet and terminals
		Trap blocked Check the trap and clean it if necessary
F03 F15 F18 A07	High fume temperature	The fume probe detects an excessive temperature	Check the exchanger
			Check the flue gas probe
			Check the flue material parameter
F04 A08	Overtemperature protection intervention	Heating sensor damaged	Check the correct positioning and operation of the heating sensor and replace it if necessary
		No water circulation in the system	Check the circulating pump
		Air in the system Vent the system
F16 A09	Overtemperature protection intervention	Return sensor damaged	Check the correct positioning and operation of the return sensor and replace it if necessary
		No water circulation in the system	Check the circulating pump
		Air in the system Vent the system
F19 A10	Flow sensor fault	Sensor damaged	Check the wiring or replace the sensorWiring shorted
		Wiring disconnected
F22 A11	Return sensor fault	Sensor damaged	Check the wiring or replace the sensorWiring shorted
		Wiring disconnected
F12 DHW sensor fault		Sensor damaged	Check the wiring or replace the sensorWiring shorted
		Wiring disconnected
F17 A13	Fume probe fault	Probe damaged	Check the wiring or replace the fume probeWiring shorted
		Wiring disconnected
A14	Fume extraction duct safety device intervention	Fault F03 generated 3 times in the last 24 hours	See fault F03
A23	Optimum water pressure not reached in foreseen time	Water supply trouble Check the connection to the water supply
		Loading valve blocked in closed position	Check the loading valve and valve control relay
A24	Water pressure restored more than 3 times in 24h	Heating system leaks Check for leaks in the heating system
		DHW exchanger damaged Check the exchanger
A26	Excessive water pressure more than 3 times in an hour	Pressure too high Expansion vessel empty or damaged	Partially drain the system
		Expansion vessel empty or damaged	Check the expansion vessel
F34 Supply voltage under 170V Electric mains trouble Check the electrical system
F20F37	System water pressure too low	Pressure too low Fill the system
		Water pressure switch/pressure transducer not connected or damaged	Check the water pressure switch/pressure transducer
F39 External probe fault		Probe damaged or wiring shorted	Check the wiring or replace the sensor
		Probe disconnected after activating the sliding temperature	Reconnect the external probe or disable the sliding temperature
F41	Activation of maximum DELTA T protection	Heating sensor damaged	Check the correct positioning and operation of the heating sensor
		Return sensor damaged	Check the correct positioning and operation of the return sensor
		No water circulation in the system	Check the circulating pump
		Air in the system Vent the system
F21F40	System water pressure too high	Pressure too high Partially drain the system
		Filling valve blocked in open position	Check the filling valve and valve control relay
		Expansion vessel empty or damaged	Check the expansion vessel
F36A42	Sensor control protection activation	Return and/or flow sensor damaged or disconnected	Check the correct positioning and operation of the return and/or flow sensor
		Return sensor damaged or disconnected	Check the correct positioning and operation of the return sensor
F43	Exchanger protection intervention.	No system H2O circulation	Check the circulating pump
		Air in the system Vent the system
F47 Water pressure sensor error		Water pressure sensor disconnected	Check the water pressure sensor wiring
		Water pressure sensor damaged	Check the water pressure sensor
F51	Low water pressure with parameter b06 = 3	Pressure too low Fill the system
		Secondary water pressure switch disconnected or damaged	Check the water pressure switch/pressure transducer
		Incorrect parameter Check the correct parameter setting
F50 - F53	Limit thermostat fault with parameter b06 = 1 or 4	No/poor water circulation in the system	Check the circulating pump
		Air in the system Vent the system
		Incorrect parameter Check the correct parameter setting
F57 - A56	Calibration fault	Incorrect parameters	Check parameters and carry out a 100% calibration
		Electrode damaged or not correctly positioned.	Check the position of the electrode, replace it if necessary. After replacement, repeat the 100% calibration
		Recirculation of fumes inside the boiler	Check the tightness of the flue pipe and the seal of gaskets
	Calibration procedure not completed	Poor primary circuit circulation or poor dissipation during calibration	Reset the fault. Turn on the hot water faucet and wait for the flame to stop flashing (about 2 minutes)
F58 - A61 Controller fault Controller internal error			Check the ground connection.Check the electrode.If necessary replace the control unit.
A54 - A55 - A63 Controller fault Controller internal error			Try disconnecting the power supply to the boiler for 10 seconds and replace the controller if necessary
F67 BCC Service key connected Load the parameters
F65 - A68 BCC Service key error		Error loading BCC Service key file	Repeat the loading procedure within 5 minutes from the boiler power supply and replace the BCC Service key if necessary
A62	No communication between controller and gas valve	Controller not connected	Connect the controller to the valveCheck the wiring
		Valve damaged Replace the valve
A64	Maximum number of consecutive Resets exceeded	Maximum number of consecutive Resets exceeded	Turn off the power to the boiler for 60 seconds and then reinstate the boiler
F66		Firmware not loaded successfully	Reload the firmware or replace the card

4. Technical data and characteristics

4.1 Dimensions and connections

fig. 35- Front view

fig. 36- Side view

fig. 37- Top view

fig. 38- Bottom view

7 Gas inlet - ∅ 3/4"
8 DHW outlet - ∅ 1/2"
9 Cold water inlet - ∅ 1/2"
10 System flow - ∅ 3/4"
11 System return - ∅ 3/4"
A6 Condensate discharge connection

Metal template (code 046049X0) and wall holes

Paper template and wall holes

The boiler comes with a paper template for the wall holes.

fig. 41- Paper template

4.2 General view

fig. 42- General view

14 Safety valve
16 Fan
32 Heating circulating pump
34 Heating temperature sensor
36 Automatic air vent
42 DHW temperature probe
44 Gas valve
56 Expansion vessel
81 Ionization/ignition electrode
95 Diverter valve
136 Flowmeter
145 Water gauge
186 Return sensor
191 Fume temperature sensor
193 Trap
194 DHW exchanger
196 Condensate tray
240 System filling solenoid valve
294 Pressure sensor
350 Fan/Burner assembly

4.3 Hydraulic circuit

graph TD
    A["1089"] --> B["34"]
    B --> C["193"]
    C --> D["186"]
    D --> E["56"]
    E --> F["32"]
    F --> G["95"]
    G --> H["11"]
    H --> I["74"]
    I --> J["240"]
    J --> K["241"]
    K --> L["136"]
    L --> M["42"]
    M --> N["14"]
    N --> O["294"]

fig. 43- Hydraulic circuit

8 Domestic hot water outlet

9 Cold water inlet

10 System flow

11 System return

14 Safety valve

32 Heating circulating pump

34 Heating temperature sensor

36 Automatic air vent

241 Automatic bypass (inside the pump unit)

294 Pressure sensor

4.4 Technical data table

0TSB2MWA	BLUEHELIX MAXIMA 24C
0TSB4MWA	BLUEHELIX MAXIMA 28C
0TSB7MWA	BLUEHELIX MAXIMA 34C

COUNTRIES OF DESTINATION IT ES RO PL
GAS CATEGORY II2HM3+ (IT) II2H3+ (ES) II2H3B/P (RO) II2ELwLs3B/P (PL)
PRODUCT IDENTIFICATION CODES		0TSB2MWA	0TSB4MWA	0TSB7MWA
Max. heating capacity	kW	20,4	24,5	30,6	Qn
Min. heating capacity	kW	2,9	2,9	2,9	Qn
Max. heat output in heating (80/60°C)	kW	20,0	24,0	30,0	Pn
Min. heat output in heating (80/60°C)	kW	2,8	2,8	2,8	Pn
Max. heat output in heating (50/30°C)	kW	21,6	26,0	32,5	Pn
Min. heat output in heating (50/30°C)	kW	3,1	3,1	3,1	Pn
Max. heating capacity in DHW	kW	25,0	28,5	34,7	Qnw
Min. heating capacity in DHW	kW	2,9	2,9	2,9	Qnw
Max. heat output in DHW	kW	24,5	28,0	34,0
Min. heat output in DHW	kW	2,8	2,8	2,8
Efficiency Pmax (80-60°C)	%	98,1	98,1	97,9
Efficiency Pmin (80-60°C)	%	98,0	98,0	98,0
Efficiency Pmax (50-30°C)	%	106,1	106,1	106,1
Efficiency Pmin (50-30°C)	%	107,5	107,5	107,5
Efficiency 30%	%	109,7	109,7	109,5
Gas supply pressure G20	mbar	20,0	20,0	20,0
Max. gas flow G20	m3/h	2,65	3,02	3,67
Min. gas flow G20	m3/h	0,31	0,31	0,31
CO2 - G20	%	9 ±0,8
Gas supply pressure G31	mbar	37,0	37,0	37,0
Max. gas flow G31	kg/h	1,94	2,21	2,70
Min. gas flow G31	kg/h	0,23	0,23	0,23
CO2 - G31	%	10 ±0,8
NOx emissions class	-	6 (< 56 mg/kWh)			NOx
Max. working pressure in heating	bar	3,0	3,0	3,0	PMS
Min. working pressure in heating	bar	0,8	0,8	0,8
Heating adjustment max. temperature	°C	95	95	95	tmax
Heating water content	liters	2,9	2,9	4,3
Heating expansion vessel capacity	liters	8	8	10
Heating expansion vessel precharge pressure	bar	0,8	0,8	0,8
Max. working pressure in DHW	bar	9,0	9,0	9,0	PMW
Min. working pressure in DHW	bar	0,3	0,3	0,3
DHW flow rate Dt 25°C	l/min	14,0	16,1	19,5
DHW flow rate Dt 30°C	l/min	11,7	13,4	16,2	D
DHW water content	litri	0,3	0,3	0,4	H2O
Protection rating	IP	IPX4D
Power supply voltage	V/Hz	230V~50HZ
Electrical power input	W	73,0	82,0	99,0	W
Empty weight	kg	28,0	28,0	32,0
Type of unit C10-C11-C13-C23-C33-C43-C53-C63-C83-C93-B23-B33
C10-C11 flues installation pressure Pa		77 80	79

ErP product fiche

MODEL: BLUEHELIX MAXIMA 24C - (0TSB2MWA)

Trademark: FERROLI
Condensing boiler: YES
Low-temperature boiler (**): YES
B1 Boiler: NO
Combination heater: YES
Cogeneration space heater: NO
Item	Symbol	Unit	Value
Seasonal space heating energy efficiency class (from A+++ to D)			A
Rated heat output	Pn	kW	20
Seasonal space heating energy efficiency	_s	%	93
Useful heat output
Useful heat output at rated heat output and high-temperature regime (*)	P4	kW	20,0
Useful heat output at 30% of rated heat output and low-temperature regime (**)	P1	kW	3,8
Useful efficiency
Useful efficiency at rated heat output and high-temperature regime (*)	_4	%	88,3
Useful efficiency at 30% of rated heat output and low-temperature regime (**)	_1	%	98,8
Auxiliary electricity consumption
At full load	elmax	kW	0,022
At part load	elmin	kW	0,010
In standby mode	PSB	kW	0,003
Other items
Standby heat loss	Pstby	kW	0,042
Ignition burner power consumption	Pign	kW	0,000
Annual energy consumption	QHE	GJ	38
Sound power level	LWA	dB	44
Emissions of nitrogen oxides	NOx	mg/kWh	39
For combination heaters
Declared load profile			XL
Water heating energy efficiency class (from A+ to F)			A
Daily electricity consumption	Qelec	kWh	0,154
Annual electricity consumption	AEC	kWh	33
Water heating energy efficiency	_wh	%	87
Daily fuel consumption	Qfuel	kWh	20,330
Annual fuel consumption	AFC	GJ	17

(*) High-temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet).

ErP product fiche

MODEL: BLUEHELIX MAXIMA 28C - (0TSB4MWA)

Trademark: FERROLI
Condensing boiler: YES
Low-temperature boiler (**): YES
B1 Boiler: NO
Combination heater: YES
Cogeneration space heater: NO
Item	Symbol	Unit	Value
Seasonal space heating energy efficiency class (from A+++ to D)			A
Rated heat output	Pn	kW	24
Seasonal space heating energy efficiency	_s	%	94
Useful heat output
Useful heat output at rated heat output and high-temperature regime (*)	P4	kW	24,0
Useful heat output at 30% of rated heat output and low-temperature regime (**)	P1	kW	4,5
Useful efficiency
Useful efficiency at rated heat output and high-temperature regime (*)	_4	%	88,3
Useful efficiency at 30% of rated heat output and low-temperature regime (**)	_1	%	98,8
Auxiliary electricity consumption
At full load	elmax	kW	0,028
At part load	elmin	kW	0,011
In standby mode	PSB	kW	0,003
Other items
Standby heat loss	Pstby	kW	0,042
Ignition burner power consumption	Pign	kW	0,000
Annual energy consumption	QHE	GJ	44
Sound power level	LWA	dB	45
Emissions of nitrogen oxides	NOx	mg/kWh	39
For combination heaters
Declared load profile			XL
Water heating energy efficiency class (from A+ to F)			A
Daily electricity consumption	Qelec	kWh	0,148
Annual electricity consumption	AEC	kWh	34
Water heating energy efficiency	_wh	%	87
Daily fuel consumption	Qfuel	kWh	20,229
Annual fuel consumption	AFC	GJ	17

(*) High-temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet).

ErP product fiche

MODEL: BLUEHELIX MAXIMA 34C - (0TSB7MWA)

Trademark: FERROLI
Condensing boiler: YES
Low-temperature boiler (**): YES
B1 Boiler: NO
Combination heater: YES
Cogeneration space heater: NO
Item	Symbol	Unit	Value
Seasonal space heating energy efficiency class (from A+++ to D)			A
Rated heat output	Pn	kW	30
Seasonal space heating energy efficiency	_s	%	94
Useful heat output
Useful heat output at rated heat output and high-temperature regime (*)	P4	kW	30,0
Useful heat output at 30% of rated heat output and low-temperature regime (**)	P1	kW	5,5
Useful efficiency
Useful efficiency at rated heat output and high-temperature regime (*)	_4	%	88,2
Useful efficiency at 30% of rated heat output and low-temperature regime (**)	_1	%	98,6
Auxiliary electricity consumption
At full load	elmax	kW	0,036
At part load	elmin	kW	0,009
In standby mode	PSB	kW	0,003
Other items
Standby heat loss	Pstby	kW	0,046
Ignition burner power consumption	Pign	kW	0,000
Annual energy consumption	QHE	GJ	55
Sound power level	LWA	dB	47
Emissions of nitrogen oxides	NOx	mg/kWh	37
For combination heaters
Declared load profile			XXL
Water heating energy efficiency class (from A+ to F)			A
Daily electricity consumption	Qelec	kWh	0,167
Annual electricity consumption	AEC	kWh	37
Water heating energy efficiency	_wh	%	85
Daily fuel consumption	Qfuel	kWh	25,582
Annual fuel consumption	AFC	GJ	22

(*) High-temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet).

4.5 Diagrams

Residual head available for system

BLUEHELIX MAXIMA 24C and BLUEHELIX MAXIMA 28C

fig. 44- Residual head available for system

BLUEHELIX MAXIMA 34C

fig. 45- Residual head available for system

4.6 Wiring diagram (fig. 46)

16 Fan

32 Heating circulating pump

34 Heating temperature sensor

Attention: Remove the jumper on the terminal block before connecting the room thermostat or the remote timercontrol.

To connect multiple zones of the plumbing system controlled by thermostats with voltage-free contact and to use the timer control as a function of remote boiler controls, connect the voltage-free contacts of the zones to terminals 1-2 and the timer control to terminals 5-6.

ALL CONNECTIONS TO THE TERMINAL BLOCK MUST BE WITH VOLTAGE-FREE CONTACTS (NOT 230V).

FERROLI S.p.A.

Via Ritonda 78/a

37047 San Bonifacio - Verona - ITALY

www.ferroli.com