Ferroli DIVAtech D HF24 Wall Mounted Gas Boiler Instruction Manual

Ferroli DIVAtech D HF24 Wall Mounted Gas Boiler

GENERAL INFORMATION

• 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 personnel, 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 the unit and do not try to repair 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.

OPERATING INSTRUCTIONS

Introduction
Dear Customer,
DIVAtech D HF is a high-efficiency sealed chamber heat generator for heating and hot water production (optional) running on natural gas or LPG, and equipped with a microprocessor control system.
AThe boiler is arranged for connection to an external storage tank for hot water (optional). In this manual all the functions relevant to domestic hotwater production are only active with the optional hot water tank connected as indicated in sec. 3.3

Control panel

Panel

Key of panel fig. 1

1. DHW temperature setting decrease button
2. DHW temperature setting increase button
3. Heating system temperature setting decrease button
4. Heating system temperature setting increase button
5. Display
6. “Sliding Temperature” Menu – Summer/Winter mode selection – Reset button
7. Unit On/Off – Economy/Comfort mode selection button
8. DHW symbol
9. DHW mode
10. Summer mode
11. Multifunction
12. Eco (Economy) mode
13. Heating
14. Heating symbol
15. Burner lit and actual power level (flashing during combustion fault function)
16. Service Tool connection
17. Water gauge

Indication during operation

Heating
A heating demand (generated by the Room Thermostat or Remote Timer Control) is indicated by the flashing of the hot air above the radiator on the display.
The display (detail 11 – fig. 1) shows the actual heating delivery temperature and, during heating standby time, the message “d2”.
In the event of continuous “d2” messages, reduce parameter P01 (ignition power – ““tS”

• Transparent Parameters Menu” on page 8) to a minimum of 9.

Domestic hot water (DHW)
A DHW demand (generated by drawing domestic hot water) is indicated by the flashing of
the hot water under the tap on the display.
The display (detail 11 – fig. 1) shows the actual DHW outlet temperature and, during
DHW standby time, the message “d1“.

Comfort
A Comfort demand (reinstatement of the temperature inside the boiler) is indicated by flashing of the water under the tap on the display. The display (detail 11 – fig. 1) shows the actual temperature of the water in the boiler.
Fault
In case of a fault (see cap. 4.4) the display shows the fault code (detail 11 – fig. 1) and during safety pause times the messages “d3”, “d4” and “d5”.

Lighting and shutdown

Connection to the power supply

• During the first 5 seconds the display will also show the card software release.
• Open the gas cock ahead of the boiler.
• The boiler is now ready to function automatically whenever domestic hot water is drawn or in case of a heating demand (generated by Room Thermostat or Remote Temperature Control).

Turning the boiler off and on
Press the on/off button (detail 7 – fig. 1) for 5 seconds.

When the boiler is turned off, the circuit board is still powered. Domestic hot water and heating are disabled. The frost protection system remains activated. To relight the boiler, press the on/off button (detail 7 fig. 1) again for 5 seconds.

The boiler will be immediately ready to work whenever domestic hot water is drawn or in case of a heating demand (generated by the Room Thermostat or the Remote Timer control).
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. 3.3.

Adjustments

Summer/Winter Switchover
Press the summer/winter button (detail 6 – fig. 1) for 2 seconds.
The display activates the Summer symbol (detail 10 – fig. 1): the boiler will only deliver domestic hot water. The antifreeze system remains activated.
To deactivate the Summer mode, press the summer/winter button (detail 6 – fig.

1. again for 2 seconds.

Heating temperature adjustment
Use the heating buttons (details 3 and 4 – fig. 1) to adjust the temperature from a min. of 30°C to a max. of 80°C; in any case, it is advisable not to operate the boiler below 45°C.

DHW temperature adjustment
Use the DHW buttons (details 1 and 2 – fig. 1) to adjust the temperature from a min. of 40°C to a max. of 55°C.

Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room ther-mostat is not installed, the boiler will keep the system at the set system delivery setpoint temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will adjust the system water according to the required room temperature. For operation with remote timer control, please refer to the relevant instruction manual.

ECO/COMFORT selection
The unit has a function that ensures a high domestic hot water delivery speed and max-imum comfort for the user. When the device is activated (COMFORT mode), the water contained in the boiler is kept hot, thereby ensuring immediate availability of hot water on opening the tap, without waiting times.
The user can deactivate the device (ECO mode) by pressing the eco/comfort button (detail 7 – fig. 1). In ECO mode the display activates the ECO symbol (detail 12 – fig. 1). To activate the COMFORT mode, press the eco/comfort button (detail 7 – fig. 1) again.

Sliding Temperature
When the optional 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 the high comfort and energy efficiency through-out the year. In particular, as the outside temperature increases the system delivery temperature decreases according to a specific “compensation curve”.
With the Sliding Temperature adjustment, the temperature set with the heating buttons (detail 3 – fig. 1) becomes the maximum system delivery 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 optimise comfort levels.

Compensation curve and curve offset

Press the reset button (detail 6 – fig. 1) for 5 seconds to access the “Sliding temperature” menu; the display shows “CU” flashing.
Use the DHW buttons (detail 1 – fig. 1) to adjust the desired curve from 1 to 10 according to the characteristic (fig. 6). By setting the curve to 0, the sliding temperature adjustment is disabled.
Press the heating buttons (detail 3 – fig. 1) to access parallel curve offset; the display shows “OF” flashing. Use the DHW buttons (detail 1 – fig. 1) to adjust parallel curve offset according to the characteristic (fig. 7).
Press the reset button (detail 6 – fig. 1) again for 5 seconds to exit the “Sliding Temperature” menu.
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.

Adjustments from Remote Timer Control
If the Remote Timer Control (optional) is connected to the boiler, the above adjustments are managed according to that given in table 1.

Table. 1

Heating temperature setting| Adjustment can be made from the Remote Timer Control menu and the boiler control panel.
---|---
DHW temperature adjustment| Adjustment can be made from the Remote Timer Control menu and the boiler control panel.
Summer/Winter Switchover| Summer mode has priority over a possible Remote Timer Control heating demand.

Eco/Comfort selection

| On disabling DHW from the Remote Timer Control menu, the boiler selects the Economy mode. In this condition, the eco/com- fort button (detail 7 – fig. 1) on the boiler panel is disabled.
On enabling DHW from the Remote Timer Control menu, the boiler selects the Comfort mode. In this condition it is possible select one of the two modes with the eco/comfort button (detail 7

– fig. 1) on the boiler panel.

Sliding Temperature

| Both the Remote Timer Control and the boiler card manage Slid- ing Temperature adjustment: the boiler card Sliding Temperature has priority.

System water pressure adjustment
The filling pressure read on the boiler water gauge (detail 2 – fig. 8) with system cold must be approx 1.0 bar. If the system pressure falls below minimum values, the boiler stops and fault F37 is displayed. Pull out the filling knob (detail 1 – fig. 8) and turn it anticlock-wise 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 indicated on the display by Fh.
To prevent boiler shutdown, it is advisable to periodically check the pressure on the gauge with system cold. In case of a pressure below 0.8 bar, it is advisable to restore it.

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. 9) 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.

INSTALLATION

General Instructions

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

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 tempera-ture of -5°C. If provided with the special antifreeze kit, it can be used with a minimum tem-perature down to -15°C. 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 cor-rosive 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.
A If the unit is enclosed in a cabinet or mounted alongside, there must be suffi-cient space for removing the casing and for normal maintenance activities

Plumbing connections

Important

The safety valve outlet must be connected to a funnel or collection pipe to pre-vent 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 making the connection, check that the unit is arranged for operation with the type of fuel available and carefully clean all the system pipes.

Carry out the relevant connections according to the diagram in fig. 25 and the symbols on the unit.
Note: The unit is equipped with an internal bypass in the heating circuit.
Water system characteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO3), use suitably treated water in order to avoid possible scaling in the boiler.

Antifreeze system, antifreeze fluids, additives and inhibitors
When necessary, antifreeze fluids, additives and inhibitors can be used only if the man-ufacturer 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.

Connection to a storage tank for domestic hot water
The unit’s electronic card is arranged for managing an external storage tank for domestic hot water production. Carry out the plumbing connections according to the diagram of fig. 10. Carry out the electrical connections as shown on the wiring diagram in fig. 30. It is necessary to use the kit code 1KWMA11W. At the next lighting, the boiler control sys-tem detects the hot water tank probe and automatically configures the DHW function, ac-tivating the display and relevant controls.

8 Domestic hot water outlet
9 Cold water inlet
10 System delivery – Ø 3/4”
11 System return – Ø 3/4”
95 Diverter valve
209 Hot water tank delivery – Ø 3/4”
210 Hot water tank return – Ø 3/4”

Gas connection
The gas must be connected to the relevant connection (see fig. 25) in conformity with the current standards, using a rigid metal pipe or a continuous surface flexible s/steel tube and installing a gas cock between the system and boiler. Make sure all the gas connections are tight.

Electrical connections

IMPORTANT

• BBEFORE CARRYING OUT ANY OPERATION THAT REQUIRES 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 cablegets 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” 3×0.75 mm2 with max. external diameter of 8 mm.

Room thermostat (optional)

IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMINALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for these devices from their breaking contacts Their power supply must be by means of direct connection from the mains or with batteries, depending on the kind of device.

Accessing the electrical terminal block
The electrical terminal block can be accessed after removing the casing. The layout of the terminals for the various connections is given in the wiring diagram in fig. 30.

Fume ducts

Important
The unit is a “C type” with sealed chamber and forced draught, the air inlet and fume out-let must be connected to one of the following extraction/suction systems. The unit is ap-proved for operation with all the Cny flue configurations given on the dataplate. Some configurations may be expressly limited or not permitted by law, standards or local reg-ulations. Before installation, check and carefully follow the instructions. Also, comply with the instructions on the positioning of wall and/or roof terminals and the minimum distanc-es from windows, walls, ventilation openings, etc.

Baffles
Boiler operation requires fitting the baffles supplied with the unit. Make sure boiler is properly fitted with the correct baffle (if to be used).

A Baffle replacement with boiler not installed
B Baffle replacement with boiler and fume ducts already installed

Connection with coaxial pipes

Table. 2 – Typology

For coaxial connection, fit the unit with one of the following starting accessories. For the wall hole dimensions, refer to the figure on the cover.

Table. 3- Baffles for coaxial ducts

| Coaxial 60/100| Coaxial 80/125
---|---|---
Max. permissible length| DIVAtech D HF24 = 5 m DIVAtech D HF32 = 5 m| 10 m
Reduction factor 90° bend| 1 m| 0.5 m
Reduction factor 45° bend| 0.5 m| 0.25 m

Baffle to use

| 0 ÷ 2 m| DIVAtech D HF24 = Ø43 DIVAtech D HF32 = Ø45| 0 ÷ 3 m| DIVAtech D HF24 = Ø43 DIVAtech D HF32 = Ø45
2 ÷ 5 m| no baffle| 3 ÷ 10 m| no baffle

Connection with separate pipes

Table. 4 – Typology

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 exhaust

IMPORTANT **– THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION**

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

Before installation, check the baffle to use and that the maximum permissible length is not 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 6 and identify the losses in meq (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 5.

Table. 5- Baffles for separate ducts

| DIVAtech D HF24| DIVAtech D HF32
---|---|---
Max. permissible length| 60 meq| 48 meq

Baffle to use

| 0 – 20 meq| Ø 43| 0 – 15 meq| Ø 45
20 – 45 meq| Ø 47| 15 – 35 meq| Ø 50
45 – 60 meq| No baffle| 35 – 48 meq| No baffle

Table. 6 – Accessories

| Losses in m eq
---|---
Air

inlet

| Fume exhaust
Vertical| Horizontal

Ø 80

| PIPE| 0.5 m M/F| 1KWMA38A| 0.5| 0.5| 1.0
1 m M/F| 1KWMA83A| 1.0| 1.0| 2.0
2 m M/F| 1KWMA06K| 2.0| 2.0| 4.0
BEND| 45° F/F| 1KWMA01K| 1.9| 2.9
45° M/F| 1KWMA65A| 1.9| 2.9
90° F/F| 1KWMA02K| 2.0| 3.0
90° M/F| 1KWMA82A| 1.5| 2.5
90° M/F + Test point| 1KWMA70U| 1.5| 2.5
PIPE SECTION| with test point| 1KWMA16U| 0.2| 0.2
for condensate drain| 1KWMA55U| –| 3.0
TEE| for condensate drain| 1KWMA05K| –| 7.0
TERMINAL| air, wall| 1KWMA85A| 2.0| –
fumes, wall with antiwind| 1KWMA86A| –| 5.0
FLUE| Split air/fumes 80/80| 1KWMA84U| –| 12.0
Fume outlet only Ø80| 1KWMA83U +

1KWMA86U

| –| 4.0

Ø 100

| REDUCTION| from Ø80 to Ø100| 1KWMA03U| 0.0| 0.0
from Ø100 to Ø80| 1.5| 3.0
PIPE| 1 m M/F| 1KWMA08K| 0.4| 0.4| 0.8
BEND| 45° M/F| 1KWMA03K| 0.6| 1.0
90° M/F| 1KWMA04K| 0.8| 1.3
TERMINAL| air, wall| 1KWMA14K| 1.5| –
fumes, wall with antiwind| 1KWMA29K| –| 3.0

Ø 60

| PIPE| 1 m M/F| 010028X0| –| 2.0| 6.0
BEND| 90° M/F| 010029X0| –| 6.0
REDUCTION| 80 – 60| 010030X0| –| 8.0
TERMINAL| fumes, wall| 1KWMA90A| –| 7.0
| | ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF Ø60 ACCESSORIES;

USE THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.

Connection to collective flues

Table. 7 – Typology

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 draught

IMPORTANT- **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 DIVAtech D HF to a collective flue or to a single flue with natural draught, the flue or chimney must be expressly designed by professionally qual-ified technical personnel in conformity with the current regulations and be suitable for sealed chamber units equipped with fan.

SERVICE AND MAINTENANCE

Important
All adjustment, conversion, commissioning and maintenance operations described below must only be carried out by Qualified Personnel (meet-ing the professional technical requirements of current regulations) such as the personnel of the Local After-Sales Technical Service.

FERROLI declines any liability for damage and/or injury caused by unqualified and unauthorized persons tampering with the unit.

Adjustments

Gas conversion
ALL COMPONENTS DAMAGED DURING CONVERSION OPERATIONS MUST BE REPLACED.

The unit can operate on natural gas or LPG and is factory-set for use with one of these two gases, as clearly shown on the packing and on the data plate. Whenever a gas dif-ferent from that for which the unit is arranged has to be used, the special conversion kit will be required, proceeding as follows:

1. Disconnect the boiler power supply and close the gas cock.
2. Replace the nozzles at the main burner, fitting the nozzles specified in the technical data table in cap. 5, according to the type of gas used
3. Switch the boiler power on and open the gas cock.
4. Modify the parameter for the type of gas:
   • put the boiler in standby mode
   • press the DHW buttons details 1 and 2 – fig. 1 for 10 seconds: the display shows “b01“ flashing.
   • press the DHW buttons details 1 and 2 – fig. 1 to set the parameter 00 (for nat-ural gas operation) or 01 (for LPG operation).
   • press the DHW buttons details 1 and 2 – fig. 1 for 10 seconds.
   • the boiler will return to standby mode
5. Adjust the minimum and maximum pressures at the burner (ref. relevant para-graph), setting the values given in the technical data table for the type of gas used
6. Apply the sticker contained in the conversion kit, near the data plate as proof of the conversion.

Activation of Auto-setting function for gas valve calibration
THIS PROCEDURE MUST ONLY BE CARRIED OUT IN THE FOLLOWING CASES: GAS VALVE REPLACEMENT, CARD REPLACEMENT, CONVERSION FOR GAS CHANGE.

The B&P Gas Valve (with integrated modulating operator) does not provide for mechanical calibration: the minimum and maximum power adjustments are therefore electronically done via two parameters:

Gas valve pre-calibration

1. Connect a pressure gauge to monitor the gas valve outlet pressure.
2. Enable the Auto-setting function (Parameter b12=1).
3. Activate the calibration procedure by pressing the heating + button and Eco/Comfort button together for 5 seconds. The message “Au-to” immediately appears (in two successive flashes) and the burner is lit. Within 8 seconds (natural gas and LPG) the boiler finds the ignition point. The ignition point, absolute minimum current Offset (Parameter q01) and absolute maximum current Offset (Parameter q02) values are stored by the card.

Gas valve calibration

1. The display will show “q02” flashing; the modulation current is forced to the pre-calibration value of the absolute maximum current Offset parameter (Parameter q02).
2. Press the DHW buttons to adjust the parameter “q02” until the maximum nominal pressure minus 1mbar is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.
3. Press the DHW “+” button to set the parameter “q02” until the maximum nominal pressure is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.
4. If the pressure read on the pressure gauge is different from the maximum nominal pressure, proceed in increments of 1 or 2 units of the parameter “q02” by pressing the DHW “+” button: after each change, wait 10 seconds for the pressure to stabilise.
5. When the pressure read on the pressure gauge is equal to the maximum nominal pressure (the newly calibrated value of the parameter “q02” is automatically saved), press the heating “–” button: the display will show “q01” flashing; the modulation current is forced to the pre-calibration value of the absolute minimum current Offset parameter (Parameter q01).
6. Press the DHW buttons to adjust the parameter “q01” until the minimum nominal pressure plus 0.5mbar is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.
7. Press the DHW “-” button to adjust the parameter “q01” until the minimum nominal pressure is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.
8. If the pressure read on the pressure gauge is different from the minimum nominal pressure, proceed in decrements of 1 or 2 units of the parameter “q01” by pressing the DHW “-” button: after each change, wait 10 seconds for the pressure to stabilise.
9. When the pressure read on the pressure gauge is equal to the minimum nominal pressure (the newly calibrated value of the parameter “q01” is automatically saved.), recheck both adjustments by pressing the heating buttons and correct them if nec-essary by repeating the procedure described above.
10. The calibration procedure ends automatically after 15 minutes or by pressing the heating “+” and Eco/Comfort buttons together for 5 seconds.

Checking of gas pressure values and adjustment with limited range

• Check that the supply pressure complies with that indicated in the technical data table.

• Connect a suitable pressure gauge to the pressure sampling point “B” located downstream from the gas valve.

• Activate the TEST mode and follow the instructions for checking the gas pressures at maximum power and minimum power (see next par.).
  If the maximum and/or minimum nominal pressures read on the pressure gauge are dif-ferent from those indicated in the technical data table, proceed with the next sequence.

• Press the Eco/Comfort button for 2 seconds to go to the gas valve Calibration with limited range mode.

• The card goes to the setting “q02”; displaying the currently saved value by pressing the DHW buttons.

• If th emaximum pressure read on the pressure gauge is different from the nominal one, proceed in increments/decrements of 1 or 2 units of the parameter “q02” by pressing the DHW buttons: after each change, the value is stored; wait 10 seconds for the pressure to stabilise.

• Press the heating “-” button (ref. 3 – fig. 1).

• The card goes to the setting “q01”; displaying the currently saved value by pressing the DHW buttons.

• If th eminimum pressure read on the pressure gauge is different from the nominal one, proceed in increments/decrements of 1 or 2 units of the parameter “q01” by pressing the DHW buttons: after each change, the value is stored; wait 10 seconds for the pressure to stabilise.

• Recheck both settings by pressing the heating buttons and if necessary correct them by repeating the procedure described above.

• Pressing the Eco/Comfort button for 2 seconds returns to TEST mode.

• Deactivate TEST mode (see next par.).

• Disconnect the pressure gauge.

TEST mode activation
Press the heating buttons (details 3 and 4 – fig. 1) together for 5 seconds to activate the TEST mode. The boiler lights at the maximum heating power set as described in the following section.
The heating and DHW symbols (fig. 19) flash on the display; the heating power will appear alongside.

Press the heating buttons (details 3 and 4 – fig. 1) to increase or decrease the power (Min.=0%, Max.=100%).
By pressing the DHW “-” button (detail 1 – fig. 1), boiler output is immediately adjusted to min. (0%). By pressing the DHW “+” button (detail 2 – fig. 1), boiler output is immediately adjusted to max. (100%).

If the TEST mode is activated and enough hot water is drawn to activate the DHW mode, the boiler remains in TEST mode but the 3-way valve goes to DHW.
To deactivate the TEST mode, press the heating buttons (details 3 and 4 – fig.

1. together for 5 seconds.
   The TEST mode is automatically deactivated in any case after 15 minutes or on stopping of hot water drawing (if enough hot water has been drawn to activate the DHW mode).
   Heating power adjustment
   To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the heating buttons detail 3 – fig. 1 to increase or decrease the power (min. = 00 – max. = 100). Press the reset button within 5 seconds and the max. power will remain that just set. Exit TEST mode (see sec. 4.1).

Configuration Menu
The configuration Menu is accessed by pressing the DHW buttons together for 10 sec-onds. 12 parameters, indicated by the letter “b” and not modifiable from Remote Timer Control, are available.
Press the Heating buttons to scroll the list of parameters in increasing or decreasing or-der. Press the DHW buttons to view or modify the value of a parameter: the change will be automatically saved.

1=LPG

b02

|

Boiler type selection

| 1=Bithermal instantaneous|

3

2=Monothermal instantaneous
3=Heating only (3-way valve)
4=Heating only (circulating pump)

b03

|

Combustion chamber type selec- tion

| 0=Sealed Chamber combustion con- trol

(without fume pressure switch)

|

0

1=Open Chamber (with fume thermo- stat)
2=Sealed Chamber (with fume pres- sure switch)
3=Sealed Chamber Combustion con- trol

(with fume thermostat on recuperator)

4=LOW NOx Sealed Chamber Com- bustion control

(without fume pressure switch)

5=LOW NOx Open Chamber (with fume thermostat)
b04| Primary Exchanger type selection| 0 ÷ 13| 4 (for model HF24)

5 (for model HF32)

b05

|

Variable output relay operation selection (b02=1)

| 0 = External gas valve|

NOT AVAILABLE FOR THIS MODEL

1 = System filling solenoid valve
2 = Solar 3-way valve
3 = Supply indicator with fault present
4 = Supply indicator without fault present
5 = External circulating pump (during demand and post circulation)
No effect on adjustment (b02=2)| —| 0
No effect on adjustment (b02=3)| —|
No effect on adjustment (b02=4)| —|
b06| Mains Voltage Frequency| 0=50Hz| 0
1=60Hz

b07

| Comfort burner on time (b02=1)| 0-20 seconds|

5

No effect on adjustment (b02=2)| —
No effect on adjustment (b02=3)| —
No effect on adjustment (b02=4)| —
b08| Gas valve driver| 0 = Standard, 1| 0

b09

|

DHW demand type selection

| 0 = Flow switch|

1

1 = Flowmeter (190 imp/l)
2 = Flowmeter (450 imp/l)
3 = Flowmeter (700 imp/l)

b10

| Flowmeter timing (b02=1)| 0 = Deactivated

1 ÷ 10=seconds

|

0

Flowmeter timing (b02=2)| 0=Deactivated 1-10=seconds
No effect on adjustment (b02=3)| —
No effect on adjustment (b02=4)| —
Contents| Description| Range to use| Parameter
---|---|---|---

b11

| DHW mode activation flow rate (b02=1)| 10 ÷ 100 L/min/10|
DHW mode activation flow rate (b02=2)| 10 ÷ 100 L/min/10| 15
No effect on adjustment (b02=3)| —|
No effect on adjustment (b02=4)| —|
b12| Enable Auto-Settings procedure| 0 = Disabled

1 = Enabled

| 0

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.

To exit the configuration Menu press the DHW buttons together for 10 seconds, or exiting occurs automatically after 2 minutes.

Service menu
The card Service Menu is accessed by pressing the Reset button for 20 seconds. 4 sub-menus are available: press the Heating buttons to select, in increasing or decreasing order, “tS”, “In”, “Hi” or “rE”. “tS” means Transparent Parameters Menu, “In” means Information Menu, “Hi” means History Menu: after selecting the submenu, press the Re-set button again to access it; “rE” means History Menu Reset: see description.
“tS” – Transparent Parameters Menu
21 parameters, indicated by the letter “P” are available, which are also modifiable from Remote Timer Control.
Press the Heating buttons to scroll the list of parameters in increasing or decreasing order. Press the DHW buttons to view or modify the value of a parameter: the change will be automatically saved.

P07

|

Burner shutdown in DHW (b02=1)

| 0=Fixed|
1=Linked to setpoint
2=Solar
3 = DO NOT USE
4 = DO NOT USE

Burner shutdown in DHW (b02=2)

| 0=Fixed|

0

1=Linked to setpoint
2=Solar
3 = DO NOT USE
4 = DO NOT USE
Hot water tank hysteresis (b02=3)| 0 (do not use) 1-2-3-4°C|
Hot water tank hysteresis (b02=4)| 0 (do not use) 1-2-3-4°C|

P08

| DHW standby time (b02=1)| 0-60 seconds|

30

DHW standby time (b02=2)| 0-60 seconds
DHW standby time (b02=3)| 0-60 seconds
DHW standby time (b02=4)| 0-60 seconds

P09

| DHW user max. setpoint (b02=1)| 50-65°C|

50

DHW user max. setpoint (b02=2)| 50-65°C
DHW user max. setpoint (b02=3)| 50-65°C
DHW user max. setpoint (b02=4)| 50-65°C

P10

| Anti-inertia function temperature (b02=1)| 5-85°C|
No effect on adjustment (b02=2)| —| 0
Delivery temperature in DHW (b02=3)| 70-85°C|
Delivery temperature in DHW (b02=4)| 70-85°C|

P11

| Anti-inertia function Post-Circulation (b02=1)| 0-10 Seconds|
DHW Post-Circulation (b02=2)| 0-60 Seconds| 30
DHW Post-Circulation (b02=3)| 0-60 Seconds|
DHW Post-Circulation (b02=4)| 0-60 Seconds|
P12| Max. output in DHW| 0-100%| 100
P13| Absolute min. power| 0-100%| 0
P14| Post-Ventilation| 0=Default| 0
1=50 seconds
Contents| Description| Range to use| DIVAtech D HF
---|---|---|---

P15

| CO2 limit Offset (b03=0)| 0 (Minimum)

30 (Maximum)

| 20
No effect on adjustment (b03=1)| —|
No effect on adjustment (b03=2)| —|
CO2 limit Offset (b03=3)| 0 (Minimum)

30 (Maximum)

|
CO2 limit Offset (b03=4)| 0 (Minimum)

30 (Maximum)

|
No effect on adjustment (b03=5)| —|
P16| Exchanger protection activation| 0=No F43| 10
1-15=1-15°C/second
P17| Modulating pump max. speed – absolute| Operating at 100%. Adjustable with optional cable.| 100
P18| Modulating pump max. speed – post circulation| 0-100% not operating. Always at 100% in this model| 60

P19

| Solar deactivation temperature (b02=1)| 0÷20°C|

10

Solar deactivation temperature (b02=2)| 0÷20°C
No effect on adjustment (b02=3)| —
No effect on adjustment (b02=4)| —

P20

| Solar ignition temperature (b02=1)| 0÷20°C|

10

Solar ignition temperature (b02=2)| 0÷20°C
No effect on adjustment (b02=3)| —
No effect on adjustment (b02=4)| —

P21

| Solar standby time (b02=1)| 0-20 seconds|

10

Solar standby time (b02=2)| 0-20 seconds
No effect on adjustment (b02=3)| —
No effect on adjustment (b02=4)| —

Notes:

1. Parameters with more than one description vary their function and/or range in reaction 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.

Press the Reset button to return to the Service Menu. Press the Reset button for 20 seconds to exit the card Service Menu, or exiting occurs automatically after 15 minutes.
“In” – Information Menu
PAR_INFO pieces of information are available.
Press the Heating buttons to scroll the list of information in increasing or decreasing order. Press the DHW buttons to display the value.

flash)Without NTC =

—

L05| Actual burner power (%)| 00%=Min., 100%=Max.
F06| Actual Flame resistance (kOhm)| 00-99 kOhm (– = burner off)
St07| Fan step (Number)| 0=Off, 1=Min, 2=Med, 3=Max
F08| Actual DHW drawing (L min/10)| L min/10 over 99 flashing 3 figures
PP09| Actual modulating pump speed (%)| 00-100% not working in this model

Notes:

1. In case of damaged sensor, the card displays hyphens.
   Press the Reset button to return to the Service Menu. Press the Reset button for 20 seconds to exit the card Service Menu or exiting occurs automatically after 15 minutes.
   “Hi” – History Menu
   The card can store the last 11 faults: the History datum item H1: represents the most recent fault that occurred; the History datum item H10: represents the least recent fault that occurred.
   The codes of the faults saved are also displayed in the corresponding menu of the Re-mote Timer Control.
   Press the Heating buttons to scroll the list of faults in increasing or decreasing order. Press the DHW buttons to display the value.
   Press the Reset button to return to the Service Menu. Press the Reset button for 20 seconds to exit the card Service Menu, or exiting occurs automatically after 15 minutes.
   “rE” – History Reset
   Press the Eco/Comfort button for 3 seconds to delete all the faults stored in the History Menu: the card will automatically exit the Service Menu, in order to confirm the operation.
   Press the Reset button for 20 seconds to exit the card Service Menu, or exiting occurs automatically after 15 minutes.

Commissioning

Before lighting the boiler

• Check the seal of the gas system.
• Check correct prefilling of the expansion tank.
• Fill the water 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.
• Check correct connection of the electrical system and efficiency of the earthing system.
• Make sure the gas pressure for heating is that required.
• Make sure there are no flammable liquids or materials in the immediate vicinity of the boiler

IF THE ABOVE INSTRUCTIONS ARE NOT OBSERVED THERE MAY BE RISK OF SUFFOCATION OR POISONING DUE TO GAS OR FUMES ES-CAPING; DANGER OF FIRE OR EXPLOSION. ALSO, THERE MAY BE A RISK OF ELECTRIC SHOCK OR FLOODING THE ROOM.

Checks during operation

• Switch the unit on.
• Check the tightness of the fuel circuit and water systems.
• Check the efficiency of the flue and air/fume ducts while the boiler is working.
• Make sure the water is circulating properly between the boiler and the systems.
• Make sure the gas valve modulates correctly in the heating and domestic hot water production stages.
• Check correct boiler lighting by performing various tests, turning it on and off with the room thermostat or remote control.
• Make sure the fuel consumption indicated on the meter matches that given in the technical data table in cap. 5.
• Make sure that with no demand for heating, the burner lights correctly on opening a hot water tap. Check that in heating mode, on opening a hot water tap, the heating circulating pump stops and there is regular production of hot water.
• Make sure the parameters are programmed correctly and carry out any required customisation (compensation curve, power, temperatures, etc.).

Maintenance

IMPORTANT
BALL 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.
Periodical inspection
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 switch, thermostats, etc.) must function correctly.

• The fume exhaust circuit must be perfectly efficient.
  (Sealed chamber boiler: fan, pressure switch, etc. – The sealed chamber must be tight: seals, cable glands, etc.)
  (Open chamber boiler: anti-backflow device, fume thermostat, etc.)

• The air/fume terminal and ducts must be free of obstructions and leaks

• The burner and exchanger must be clean and free of deposits. Do not use chemical products or wire brushes to clean.

• The electrode must be properly positioned and free of deposits.

• The gas and water systems must be tight.

• The pressure of the water 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 tank must be filled.

• The gas flow and pressure must match that given in the respective tables.

Troubleshooting

Diagnostics
The boiler has an advanced self-diagnosis system. In case of a boiler fault, the display will flash together with the fault symbol (detail 11 – fig. 1) indicating the fault code.
There are faults that cause permanent shutdowns (marked with the letter “A”): to restore operation, press the RESET button (detail 6 – fig. 1) for 1 second or RESET on the optional remote timer control if installed. At this point the display will show “d4” for about 30 seconds or “d5” for about 5 minutes which indicates the waiting time after which the boiler will resume normal operation. if the boiler fails to restart, it is necessary to eliminate
the fault.
Other faults cause temporary shutdowns (marked with the letter “F”) which are automatically reset as soon as the value returns within the boiler’s normal working range.

List of faults

Table. 8

A01

|

No burner ignition

|

No gas

| Check the regular gas flow to the boiler and that the air has been elimi- nated from the pipes

Ignition/detection electrode fault

| Check the wiring of the electrode and that it is correctly positioned and free of any deposits
Faulty gas valve| Check the gas valve and replace it if necessary
Gas valve wiring disconnected| Check the wiring
Ignition power too low| Adjust the ignition power

A02

| Flame present signal with burner off| Electrode fault| Check the ionisation electrode wiring
Card fault| Check the card

A03

|

Overtemperature protec- tion activation

| Heating sensor damaged| Check the correct positioning and operation of the heating sensor
No water circulation in the system| Check the circulating pump
Air in the system| Vent the system
F04| Card parameter fault| Wrong card parameter setting| Check the card parameter and modify it if necessary

F05

| Card parameter fault| Wrong card parameter setting| Check the card parameter and modify it if necessary

Fan fault

| Wiring disconnected| Check the wiring
Defective fan| Check the fan
Card fault| Check the card

A06

| No flame after the ignition phase| Low pressure in the gas system| Check the gas pressure
Burner minimum pressure setting| Check the pressures
F07| Card parameter fault| Wrong card parameter setting| Check the card parameter and modify it if necessary

A09

|

Gas valve fault

| Wiring disconnected| Check the wiring
Faulty gas valve| Check the gas valve and replace it if necessary

F10

|

Delivery sensor 1 fault

| Sensor damaged|

Check the wiring or replace the sen- sor

Wiring shorted
Wiring disconnected

F11

|

DHW sensor fault

| Sensor damaged|

Check the wiring or replace the sen- sor

Wiring shorted
Wiring disconnected

F14

|

Delivery sensor 2 fault

| Sensor damaged|

Check the wiring or replace the sen- sor

Wiring shorted
Wiring disconnected

A16

|

Gas valve fault

| Wiring disconnected| Check the wiring
Faulty gas valve| Check the gas valve and replace it if necessary

F20

|

Combustion control fault

| Fan fault| Check the fan and fan wiring
Faulty baffle| Check the baffle and replace it if nec- essary
Flue not correctly sized or obstructed| Check the flue
A21| Poor combustion fault| Fault F20 generated 6 times in the last 10 minutes| See fault F20
A23| Card parameter fault| Wrong card parameter setting| Check the card parameter and modify it if necessary
A24| Card parameter fault| Wrong card parameter setting| Check the card parameter and modify it if necessary
F34| Supply voltage under 180V.| Electric mains trouble| Check the electrical system
F35| Faulty mains frequency| Electric mains trouble| Check the electrical system
Code fault| Fault| Possible cause| Cure
---|---|---|---

F37

| ****

Incorrect system water pressure

| Pressure too low| Fill the system
Water pressure switch damaged or not connected| Check the sensor

F39

| ****

External probe fault

| Probe damaged or wiring shorted| Check the wiring or replace the sen- sor
Probe disconnected after activat- ing the sliding temperature| Reconnect the external sensor or dis- able the sliding temperature

A41

| Sensor positioning| Delivery sensor or DHW sensor detached from the pipe| Check the correct positioning and operation of the sensors
Not increase the flow tem- perature| Failed complete burner ignition| Increase parameter P1 up to a maxi- mum of 19
F42| Heating sensor fault| Sensor damaged| Replace the sensor

F43

| ****

Exchanger protection trips.

| No H2O system circulation| Check the circulating pump
Air in the system| Vent the system

F50

| ****

Gas valve fault

| Modulating Operator wiring dis-connected| Check the wiring
Faulty gas valve| Check the gas valve and replace it if necessary
A51| Poor combustion fault| Inlet/exhaust flue obstruction| Check the flue

TECHNICAL DATA AND CHARACTERISTICS

Table. 9- Legend, fig. 27, fig. 28 and fig. 29

• 5 Sealed chamber
• 10 System delivery – Ø 3/4”
• 11 System return – Ø 3/4”
• 14 Safety valve
• 16 Fan
• 19 Combustion chamber
• 22 Burner
• 27 Copper exchanger for heating and DHW 28 Fume manifold
• 29 Fume outlet collar
• 32 Heating circulating pump
• 36 Automatic air vent
• 44 Gas valve
• 56 Expansion vessel
• 74 System filling faucet
• 81 Ignition and detection electrode 95 Diverter valve
• 114 Water pressure switch
• 187 Fume baffle
• 209 Hot water tank delivery
• 210 Hot water tank return
• 241 Automatic bypass
• 278 Double sensor (Safety + heating)

Dimensions and connections

• 7 Gas inlet – Ø 3/4”
• 10 System delivery – Ø 3/4”
• 11 System return – Ø 3/4”
• 209 Hot water tank delivery – Ø 3/4”
• 210 Hot water tank return – Ø 3/4”

General view and main components

Hydraulic circuit

Technical data table

Data| Unit| DIVAtech D HF24| DIVAtech D HF32|
---|---|---|---|---
Max. heating capacity| kW| 25.8| 34.4| (Q)
Min. heating capacity| kW| 8.3| 11.5| (Q)
Max. Heat Output in heating| kW| 24.0| 32.0| (P)
Min. Heat Output in heating| kW| 7.2| 9.9| (P)
Efficiency Pmax (80-60°C)| %| 93.0| 93.1|
Efficiency 30%| %| 90.5| 91.0|
NOx emissions class| –| 3 (<150 mg/kWh)| (NOx)
Burner nozzles G20| no. x Ø| 11 x 1.35| 15 x 1.35|
Gas supply pressure G20| mbar| 20.0| 20.0|
Max. gas pressure at burner (G20)| mbar| 12.0| 12.0|
Min. gas pressure at burner (G20)| mbar| 1.5| 1.5|
Max. gas flow G20| m3/h| 2.73| 3.64|
Min. gas flow G20| m3/h| 0.88| 1.22|
Burner nozzles G31| no. x Ø| 11 x 0.79| 15 x 0.79|
Gas supply pressure G31| mbar| 37| 37|
Max. gas pressure at burner (G31)| mbar| 35.0| 35.0|
Min. gas pressure at burner (G31)| mbar| 5.0| 5.0|
Max. gas flow G31| kg/h| 2.00| 2.69|
Min. gas flow G31| kg/h| 0.65| 0.90|
Max. working pressure in heating| bar| 3| 3| (PMS)
Min. working pressure in heating| bar| 0.8| 0.8|
Max. heating temperature| °C| 90| 90| (tmax)
Heating water content| liters| 1.0| 1.2|
Heating expansion vessel capacity| liters| 8| 10|
Heating expansion vessel precharge pressure| bar| 1| 1|
Protection rating| IP| X5D| X5D|
Power supply voltage| V/Hz| 230V/50Hz| |
Electrical power input| W| 110| 135|
Empty weight| kg| 32| 35|
Type of unit| | C12-C22-C32-C42-C52-C62-C72-C82-B22|

Diagrams

Wiring diagram

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

• 16 Fan
• 32 Heating circulating pump
• 44 Gas valve
• 72 Room thermostat (optional)
• 81 Ignition/detection electrode
• 95 Diverter valve
• 114 Water pressure switch
• 138 External probe (optional)
• 139 Remote timer control (optional)
• 155 Hot water tank probe (optional)
• 278 Double sensor (Safety + heating)

References

• FERROLI - Caldaie, condizionatori ed energie alternative
• FERROLI. Официальное представительство.
• FERROLI – ОФИЦИАЛЬНОЕ ПРЕДСТАВИТЕЛЬСТВО Ð’ РФ

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