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Summary of Contents for thermital ACQUAHOME 25 B
- Page 1 INSTALLATION AND MAINTENANCE MANUAL ACQUAHOME 25 B - 25 BS...
- Page 2 Please accept our thanks and our congratulations on your choice of product. Thermital CONFORMITY boilers conform to the following ACQUAHOME 25 B - 25 BS directives: - Directive 92/42/EEC on efficiency requirements - Electromagnetic Compatibility Directive 2014/30/EU - Low Voltage Directive 2014/35/EU...
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Page 3: Table Of Contents
CONTENTS GENERAL INFORMATION COMMISSIONING AND MAINTENANCE General Safety Information......4 Preparing for initial startup ......28 Precautions. -
Page 4: General Information
GENERAL INFORMATION Precautions The operation of any appliance that uses fuel, electrical power and water demands that a number of fundamental safety General Safety Information precautions be respected: Do not allow children or infirm persons to operate the Check that the product is complete, undamaged system unsupervised. -
Page 5: Description Of The Appliance
Description of the appliance Identification The ACQUAHOME 25 B - 25 BS boiler produces hot water for The products are identified by: central heating and also produces domestic hot water in an integrated 60 litre storage cylinder. Serial number plate This is located on the boiler body and specifies the serial It can function at low temperature and is oil fuelled. -
Page 6: System Layout
System layout ACQUAHOME 25 B Automatic bleed valve Central heating circuit expansion vessel Storage cylinder with insulation Control panel Sensor sockets Capillary pressure gauge fitting Distribution manifold Flame inspection window Boiler body Boiler drain cock Burner Fuel oil filter Storage cylinder drain cock... - Page 7 ACQUAHOME 25 BS Automatic bleed valve Central heating circuit expansion vessel Storage cylinder with insulation Control panel Sensor sockets Capillary pressure gauge fitting Distribution manifold Flame inspection window Boiler body Air intake obstructed Boiler drain cock Burner Fuel oil filter Storage cylinder drain cock Storage cylinder safety valve Non-return valve...
- Page 8 BURNER Pump Burner controller Reset button with lockout indicator Flange with seal Air damper adjuster screw Comburent air inlet ( ACQUAHOME 25 B ) Oil pump pressure adjuster screw Pressure gauge fitting Photoresistor Combustion head Motor Comburent air inlet ( ACQUAHOME 25 BS )
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Page 9: Technical Specifications
Technical specifications ACQUAHOME ACQUAHOME DESCRIPTION 25 B 25 BS Mixed low temperature heating Device type Fuel Heating fuel oil (light oil) Rated heat input at furnace referred to HVC (LCV) 27,5 (26) 27,5 (26) Useful (rated) heat output Maximum useful heat output (60-80°C) 24,7 24,7... -
Page 10: Central Heating System Pump
STORAGE CYLINDER CHARACTERISTICS ACQUAHOME 25 B - 25 BS Type of storage cylinder Vitrified Storage cylinder layout Vertical Heat exchanger layout Vertical Maximum power absorbed DHW temperature setting range 0-70°C °C Storage cylinder capacity Coil water capacity Heat exchange surface area Domestic hot water production with ∆T 35°C (*) - Page 11 PUMP CURVES ACQUAHOME 25 B - 25 BS [kPa] 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 Q [m³/h] Flow-rate 1,0 Q [l/s] 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 Q [m³/h]...
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Page 12: Location Of Sensors
Location of sensors ACQUAHOME 25 B - 25 BS TS Safety thermostat sensor 1 Boiler sensor 2 Storage cylinder sensor 3 Boiler temperature gauge socket ENGLISH... -
Page 13: Control Panel
Control panel ACQUAHOME 25 B - 25 BS Function selector Burner reset Electronic control unit Boiler pressure gauge Displays the pressure in the central heating circuit Fuse holder Holds the protective fuse 6.3 A-T Indicator showing a burner lockout for a tripped safety thermostat (red) -
Page 14: Installation
INSTALLATION Overall dimensions and weights Unpacking the product boilers are delivered on a pallet, ACQUAHOME 25 B - 25 BS packed and protected by a wooden cage. The following items are delivered in a plastic bag (1) inside the boiler:... -
Page 15: Moving And Removing The Packing
Moving and removing the packing - Remove the polystyrene edge protectors (2) - Pull off the protective bag (3). Wear suitable personal protection equipment when moving the boiler and removing the packing. Only use lifting equipment that is suitable for the weight involved. Proceed as follows to remove the packing: - Remove the staples (A) fixing the wooden cage (1) to the pallet... -
Page 16: Installation Premises
Use lifting equipment suitable for the weight involved. NOTE To move ACQUAHOME 25 BS boilers, use the single bracket in the boiler body ACQUAHOME 25 B Take care because the boiler might swing when lifted. Installation premises boilers can be installed in rooms with... -
Page 17: Recommended Minimum Distances
The following table gives the dimensions and positions of the water fittings for ACQUAHOME 25 B - 25 BS boilers. Before installing the boiler, flush out all the pipes of the central heating circuit to remove any machining residues. -
Page 18: Boiler Water Circuit
Boiler water circuit Boiler body SYSTEM LAYOUT DOMESTIC HOT WATER Automatic vent valve Non-return valves Return Exit Pump Inlet Central Safety valves heating Burner flow Expansion vessel Drain cock Storage cylinder Filling cock Typical water system schematics Typical installation schematic Disconnect valves CH radiator Pressure reducer... -
Page 19: Fuel Connections
Priming the pump To prime the oil pump simply start up the burner and check The ACQUAHOME 25 B - 25 BS boiler is designed to receive fuel for a flame. oil hoses through the holes (1) in the side or rear panel. -
Page 20: Flue Gas Vent And Comburent Air Intake
Adequate ventilation is essential for correct combustion and functioning. ≥5° Models ACQUAHOME 25 BS (*) Vents needed for the ACQUAHOME 25 B boiler. øe 80 The condensate drain system (3) must conform to national and local legislation and standards. -
Page 21: Technical Specifications Of Stack
Technical specifications of stack The stack must satisfy the following requirements:: - It must be constructed from materials that are impermeable to flue gases and that offer lasting resistance to mechanical stress, heat and the action of the products of combustion and condensate - It must be vertical, free of restrictions and contain bends of no more than 45°... -
Page 22: System Filling And Emptying
System filling and emptying Filling - Make sure that the boiler drain cock (2) and storage The ACQUAHOME 25 B - 25 BS boiler is fitted with a filling cock cylinder drain cock (3) are closed before you start filling (1). -
Page 23: Emptying
Emptying Before draining the boiler or storage cylinder: - Turn the mains power switch OFF and turn the control panel function selector to ( 0 ). - Close the water supply shut-off cocks; - To empty the boiler, connect a rubber hose (Øint=12mm) to the hose union on the boiler drain cock (1) or storage cylinder drain cock (2), then open the cock. -
Page 24: Wiring Diagram
Wiring diagram WITH BURNER WITH PRE-HEATER ACQUAHOME 25 B - 25 BS B 2 C 3 COM.G. 230V ~ 50Hz Power supply COM.G. 3 position function selector White Safety thermostat (100°C 0/-6) (*) Room thermostat Mains power indicator Burner lockout indicator... -
Page 25: Electrical Connections
Electrical connections boilers are fully cabled in the factory. ACQUAHOME 25 B - 25 BS The only connections required for their installation are those of the mains power supply and the room thermostat, using the multi-connector provided: - Remove the front and top panels (A) and (B) from the boiler casing;... -
Page 26: Electronic Control Unit
Electronic control unit The electronic controller provides the interface by means of which the installer and user can set and change functioning parameters and view boiler status. The electronic controller lets you: - Change the functioning mode; - View the temperature of the boiler and storage cylinder; - Change the boiler and storage cylinder parameters (password required);... -
Page 27: Navigation Scheme
Navigation scheme Displaying and changing storage cylinder settings Displaying and changing boiler settings Displaying hours remaining to the next service E n t e r password C h a n g i n g boiler parameters C h a n g i n g s t o r a g e c y l i n d e r parameters... -
Page 28: Commissioning And Maintenance
COMMISSIONING AND MAINTENANCE - Open the control panel access door; Preparing for initial startup The boiler must be started up for the first time by the manufacturer's Technical Assistance Service. Perform the following checks before starting up the boiler: - Check that the fuel shut-off cock and heating system shut-off cock are open - Set boiler temperature to 75°C and storage cylinder temperature to 50°C as instructed in the relevant parts... -
Page 29: Resetting The Burner And Safety Thermostat
Resetting the burner and safety thermostat To restore normal startup conditions, open the cover of the control panel and turn the function selector to "Reset burner" for at least 1 second before returning it to its original position. Wait for the burner to complete the entire ignition cycle again, up to the ignition of the flame. -
Page 30: Menu Settings
Menu settings CHANGING THE FUNCTIONING MODE You can only change the boiler’s functioning mode when the display is reading out either boiler or storage cylinder temperature. Press the "mode key" repeatedly to scroll to the TEMPERATURE DISPLAY required functioning mode. The default setting is "Winter". - In stand-by mode (with the indicator lit) the boiler Storage cylinder temperature display... - Page 31 Press the key to confirm the setpoint and return to the storage If you press the key while the boiler temperature is cylinder temperature display. The indicator stops flashing. displayed, the indicator starts to flash and the boiler's current setpoint is shown on the three digit display. The default value is 75°C.
- Page 32 This allows you to view and modify the boiler parameters (P1, P2 etc.): - Press the key; - Press the key to scroll through the boiler parameters; - Press the keys to change the value of the parameter; - Press the mode key to return to the initial display. To switch between the boiler parameters and those of the storage cylinder, press the key.
- Page 33 ACCESSING AND CHANGING STORAGE You can now view and modify the storage cylinder parameters (P1, P2 etc.): CYLINDER PARAMETERS - Press the key; - Press the key to scroll through the storage cylinder Only the manufacturer's Technical Assistance Service parameters; or professionally qualified and authorised personnel are - Press the keys to change the value of the...
- Page 34 Storage cylinder parameters Default Parameter Description Range Resolution setting Boiler temperature needed for domestic hot water production. 75 ÷ 85/95 ± 1°C This parameter determines the difference between the boiler temperature setting and the storage cylinder temperature setting 2 ÷ 10 ±...
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Page 35: Checks During And After Initial Start-Up
Then turn the function selector from position to and back; ≥5° - The room thermostat or timer setting is changed; (*) Vents needed for the ACQUAHOME 25 B boiler. Always plug the sampling hole after analysing the flue gases. ENGLISH... -
Page 36: Pump Controller
Pump controller FUNCTIONING MODE The pump is configured in the factory for a maximum head of Performance display 7 metres. When the pump is running, LED 1 is green. The four yellow LEDs indicate the pump's instantaneous electrical power When necessary, the user interface provides access to: consumption as shown in the table. -
Page 37: Burner Control And Adjustment
When the button lock is active, pressing the button has no effect. This prevents users from accidentally accessing setting (*) - ACQUAHOME 25 ACQUAHOME 25 B mode while allowing them to use setting display mode. When the button is held down for 10 seconds, all the LEDs... -
Page 38: Burner Functioning And Programming
Burner functioning and programming Cycle times Program for functioning with heater ≤ Normal functioning POWER ON 600 (*) ≤ ≤ 3 repeats Times are expressed in seconds. (*) independent of burner controller DESCRIPTION Flashing green Flashing Flashing Standby: the burner waits for a heat request green orange Green... - Page 39 Lockout caused by ignition failure Lockout caused by extraneous light during pre-purging POWER ON POWER ON Lockout Lockout Flashing green Flashing Flashing green orange Flashing orange Flashing green Flashing green, red Signal not needed HT Heat request Cycle times PH Pre-heater K Thermostat for enabling start-up after pre-heating ≤...
- Page 40 Functioning status display Reset button Seconds Flash Functioning status Reset button LED colour time Pre-heating time Slow Flashing GREEN Pre-ventilation Slow Flashing ORANGE Safety time Slow Flashing GREEN Normal functioning position Steady ON GREEN Extraneous light or false flame signal Slow GREEN, RED alternate flashing Power supply frequency error...
- Page 41 MAIN BURNER FUNCTIONS POST-PURGING The post-purging function keeps the fan running for a set time FUEL PRE-HEATING FUNCTION after the burner shuts down provided there is no new heat request. The burner has an oil pre-heating function. When the boiler When the contacts of the heat request thermostat open, the thermostat requests a burner start-up, the burner waits for the burner controller shuts down the flame and shuts off the oil...
- Page 42 Menu access block diagram NORMAL FUNCTIONING (FLAME LIT) AND STANDBY BURNER STATE TYPE OF SHUTDOWN TEST POST-PURGING LIGHT DETECTION CONTROLLED LAST LOCKOUT FUNCTION SHUTDOWN IN MEMORY AND RESTART BUTTON 25 SECS. 5 SECS. 10 SECS. 15 SECS. 20 SECS. RELEASE TIME NUMBER OF 2 RED...
- Page 43 LIGHT DETECTION SHUTDOWN TEST Enabling/disabling sequence: If the reset button is pressed and held down for a time between - programming permitted in NORMAL FUNCTIONING 5 and 10 seconds during normal functioning, the burner shuts and STANDBY mode; down, the fuel oil valve closes, the flame goes out and then the - Press and hold the burner reset button for between 15 startup sequence starts.
- Page 44 EXTRANEOUS LIGHT OR FALSE FLAME SIGNAL POWER SUPPLY FREQUENCY ERROR The presence of the parasite flame or the extraneous light The burner controller automatically detects the frequency of the can be detected in the standby condition when the burner is main power supply over the interval of 50 to 60 Hz.
- Page 45 RESET / REMOTE RESET BUTTON ERROR EEPROM CONTROL If the reset or remote reset button is held down for more than 60 The burner controller automatically checks for errors in the seconds, the LED flashes to indicate an error until the button microcontroller EEPROM and enters lockout if an error is is released.
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Page 46: Temporary Shutdown
Temporary shutdown Preparing for extended periods of disuse To switch the boiler off for short periods with outdoor If the boiler is not going to be used for an extended period of temperature ABOVE ZERO: time, proceed as follows to prepare it for shut-down - Open the control panel access door;... -
Page 47: Cleaning And Servicing The Boiler
Cleaning and servicing the boiler REMOVING THE BURNER ( ACQUAHOME 25 B ) Proceed as follows to remove the burner: It is essential to clean the boiler and remove carbon deposits - Close the fuel shut-off cocks; from the surfaces of the heat exchanger in order to keep the - Disconnect the connectors (1);... - Page 48 - Pull the burner (4) out, taking care not to damage it Reverse the above steps to reassemble. REPLACING THE NOZZLE ACQUAHOME 25 B (*) - ACQUAHOME 25 Nozzle type 0,60 80°W Delavan (*) Burner with oil heater...
- Page 49 - Make sure that the new nozzle is exactly the same type REMOVING THE BURNER CONTROLLER and size as the old one - Clean the contact and sealing surfaces The burner cover has to be removed first in order to remove - Screw the new nozzle into place by hand first, then the controller.
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Page 50: Cleaning The Boiler
ACQUAHOME 25 BS - Remove the burner; - Remove the top panel (2); Models ACQUAHOME 25 B - unscrew the nuts (3) and remove the cover (4) from the flue gas box; ACQUAHOME 25 B - remove the turbulators (7) and check them for wear and fin angle (replace as necessary);... -
Page 51: Cleaning The Storage Cylinder
Proceed as follows on completion of cleaning: - Clean inside the storage cylinder and remove any - check the condition of the flame guard (9). Replace as residues through the access hole; necessary; - Check the magnesium anode (7) for wear (Replace if - refit the turbulators in the flue gas pipes, making sure necessary.);... - Page 52 SYSTEM ERRORS AND ALARMS Alarm Description This message on the three digit display indicates an active burner lockout alarm. The indicator shows steady light. This message on the three digit display indicates an active safety temperature alarm (safety thermostat tripped). The indicator shows steady light.
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Page 53: Troubleshooting
Troubleshooting FAULT CAUSE SOLUTION - Check that the burner body is clean - Check that the flue pipes are clean There is a smell of fumes Fumes escaping into the air - Check the condition of the boiler seals - Check the quality of combustion - Check adjustment of burner (perform Burner badly adjusted flue gas analysis) - Page 54 FAULT CAUSE SOLUTION Storage cylinder safety valve - Check calibration or efficiency The storage cylinder safety valve Incorrect DHW circuit pressure - Check DHW circuit pressure keeps opening - Check the efficiency of the expansion DHW circuit expansion vessel vessel Supply pressure too high - Fit a pressure reducer Flow rate too high...
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Page 55: Recycling And Disposal
RECYCLING AND DISPOSAL Packaging materials from ACQUAHOME 25 B - 25 boilers must be disposed of through appropriate channels in order to permit recovery and recycling. At the end of its useful life, dispose of the boiler in compliance with applicable legislation. - Page 56 RIELLO S.p.A. Via Ing. Pilade Riello, 7 37045 - Legnago (VR) www.thermital.it The manufacturer strives to continuously improve all products. Appearance, dimensions, technical specifications, standard equipment and accessories are therefore liable to modification without notice.
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