Ferroli OPTIMAX 25 C Instructions For Use, Installation And Maintenance
Wall-mounted gas fired, pre-mix condensing combination boiler
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Summary of Contents for Ferroli OPTIMAX 25 C
- Page 1 OPTIMAX 25 C wall-mounted gas fi red, pre-mix condensing combination boiler INSTRUCTIONS FOR USE INSTALLATION AND MAINTENANCE G C N° 47-267-34...
- Page 2 “This record must be completed and left with the end user”. Ferroli is a member of the Benchmark initiative and fully supports the aims of the programme. Benchmark has been introduced to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and effi...
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Page 3: Table Of Contents
2.4 Connection to the gas system ................13 2.5 Electrical Connections ..................13 2.6 Flue system ......................14 2.7 Condensate outlet connection ................20 2.8 Ferroli Optimax (optional) Time clock installation..........22 3. SERVICE AND MAINTENANCE............23 3.1 Adjustments ......................23 3.2 System start-up .....................24 3.3 Maintenance......................25 3.4 Troubleshooting ....................27... -
Page 4: Operating Instructions
1.1 Introduction Dear Customer, Thank you for choosing Optimax 25 C, a FERROLI wall-mounted boiler of the latest generation, featuring advanced design and cutting-edge technology. Optimax 25 C is a high-effi ciency condensing pre-mix appliance for heating with extremely low emis- sions, running on natural gas or LPG. -
Page 5: Control Panel
Optimax 25 C 1.2 Control panel °C °C fi g. 1 1 - System temperature adjustment / Summer/Winter selection This knob is used to adjust the system temperature from 20°C to 90°C and can switch over between summer / winter. To increase the system temperature, turn the knob clockwise; anticlockwise to decrease it. -
Page 6: Turning On And Off
Optimax 25 C 1.3 Turning ON and OFF Ignition • Open the gas cock on the boiler. • Purge the air from the pipework upstream of the gas valve. • Ensure the power is on to the appliance. • Press the key to turn the appliance on (fi... -
Page 7: Maintenance
If the problem remains after two attempts at resetting, contact your nearest FERROLI Caresafe. For further fault codes, refer to section 3.4 “Troubleshooting”. Before calling the FERROLI Caresafe centre, check that the problem is not due to an installation error or there being no gas or electricity. -
Page 8: Optional Time Clock
1.7 Optional Time Clock If a ferroli 24 hour time clock is fi tted to the boiler this will control the central heating, the pre set times will only come into operation when both selector switches are moved to the “Auto” position. -
Page 9: Installation
Optimax 25 C 2. INSTALLATION 2.1 General Instructions This device must only be used for the purpose for which it is specially designed. This unit is designed to heat water to a temperature below boiling point and must be connected to a hea- ting system and/or a water supply system for domestic use, compatible with its performance, characteristics and its heating capacity. -
Page 10: Boiler Location
Optimax 25 C 2.2 Boiler location The unit’s combustion circuit is sealed off from the installation room and therefore requires no compartment ventilation. The installation room must be suffi ciently well ventilated to prevent any dangerous conditions from forming in the event of even slight gas leakage. -
Page 11: Boiler Water Connections
Optimax 25 C 2.3 Boiler water connections The heating capacity of the unit should be previously established by calculating the building’s heat requirement according to current regulations. For good operation and long life of the boiler, the plum- bing system must be well proportioned and always complete with all those accessories that guarantee regular operation and running, room thermostat, trv’s and automatic bypass etc. - Page 12 Optimax 25 C The isolation valve kit shown in Fig. 4 is supplied as standard. A = Nut B = Compression olive D = 3/4 seal (green) E = 1/2 seal (green) F = 1/2 gas seal (blue) G = Filter...
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Page 13: Connection To The Gas System
Optimax 25 C Water treatment If treatment is used ferroli limited recommanded only the use of Fernox or Sentinel water treatment products, which must be used in accordance with the manufactures instructions. for further information contact: Fernox Manufacturing Co. LTD. -
Page 14: Flue System
The current standards and local regulations must be observed. It should be noted that only Ferroli fl ue system and accessories should be used on this appliance, as per BS 5440 2000 and C.E. test certifi cation. - Page 15 Optimax 25 C Connection with concentric fl ue system The unit can be connected to a concentric air/fl ue duct with a wall or rooftop outlet as shown on the following drawings. Numerous accessories are available on request to meet the various installation requirements.
- Page 16 Optimax 25 C Vertical Outlet The total length in equivalent metres of the concentric fl ue must not exceed the maximum lengths stated in the following table, note that each bend gives rise to the stated reduction. For example, a duct = 60/100 composed of 1 bend of 90°...
- Page 17 3. Check that the total calculated loss is less than or equal to 75 equivalent metres, i.e. the maximum permissible for this model of boiler. For complete fl ue options please contact ferroli or check our comprehensive fl ue manual. 1KWMA83W...
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Page 18: Terminal Position
Bend 45° Ø 80 mm male - female Vertical flue terminal KWMA65W KWMA84U Bend 90° Ø 80 mm male - female The stated loss values refer to genuine Ferroli fl ue accessories. KWMA01W Terminal Position D, E fi g. 13... - Page 19 Optimax 25 C Minimum Dimensions of Flue Terminal Positions Directly below an opening, air brick, 300mm opening windows, etc. Above an opening, air brick, 300mm opening windows, etc. Horizontally to an opening, air brick, 300mm opening windows, etc. 75mm Below gutters, soil pipes or drain pipes...
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Page 20: Condensate Outlet Connection
Connection to collective fl ues or single fl ues with natural draught If you are then going to connect the Optimax 25 C boiler to a collective fl ue or a single fl ue with natural draught, the fl ue must be expressly designed by professionally qualifi ed technical personnel in conformity with the standards and rules in force. -
Page 21: Condensate Discharge
Optimax 25 C Condensate discharge Where possible the condensate should discharge into an internal soil pipe or waste system. The minimum pipe diameter required is 22 mm, a trap has already been fi tted to the appliance with a fl exible tail to facilitate the connection to the condensate discharge pipe. -
Page 22: Ferroli Optimax (Optional) Time Clock Installation
Optimax 25 C 2.8 Ferroli Optimax (optional) Time clock installation. - Remove outer case by removing four securing screws from the lower sides and lift off. - Remove two screws securing fascia panel and swing the fascia panel down. - Remove the four screws securing rear cover of the fascia and remove. -
Page 23: Service And Maintenance
Optimax 25 C 3. SERVICE AND MAINTENANCE 3.1 Adjustments All adjustment and conversion operations must be carried out by Qualifi ed Personnel such as ferroli Technical Service. FERROLI declines any responsibility for damage or physical injury caused by unqualifi ed and unauthorized persons tampering with the device. -
Page 24: System Start-Up
Optimax 25 C 3.2 System start-up Commissioning must be performed by Qualifi ed Personnel. Checks to be made at fi rst ignition, and after all maintenance operations that involved discon- necting from the systems or an intervention of a safety device. -
Page 25: Maintenance
Optimax 25 C 3.3 Maintenance The following operations are strictly reserved for Qualifi ed Personnel, such as corgi registered engineers or Ferroli personeer. Seasonal inspection of the boiler and fl ue It is advisable to carry out the following checks at least once a year: •... - Page 26 Optimax 25 C Opening the casing To open the boiler casing, you need to follow the sequence given below and the instructions of fi g. 17. 1 Using a screwdriver, fully unscrew and remove the 2 screws “A ” 2 Open by lowering the panel “B ”...
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Page 27: Troubleshooting
Optimax 25 C 3.4 Troubleshooting Fault Diagnosis In the event of operating problems or trouble, the display will fl ash and a fault identifi cation code appears. There are faults that in order to restore operation the RESET button must be pressed (ref.2 - fi g. 1); or if the boiler fails to start, it will be necessary to repair the fault (code nos. - Page 28 Optimax 25 C Fault Possible cause Cure Software fault • Software operating fault • Cut off and restore the electricity supply. If the trouble remains, check and/or change the CVBC No flame after the ignition • Detection electrode faut • Check that the electrode is correct positioned and is necessary change phase (5 times in 4 min.)
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Page 29: Technical Characteristics And Data
Optimax 25 C 4 TECHNICAL CHARACTERISTICS AND DATA 4.1 Dimensions and connections Top view System fl ow (22 mm with isolation valve fi tted) DHW outlet (15 mm with isolation valve fi tted) Gas inlet (22 mm with isolation valve fi tted) Cold main inlet (15 mm with isolation valve fi... -
Page 30: General View And Main Components
Optimax 25 C 4.2 General view and main components Flue sensor Combustion chamber Gas inlet Domestic hot water outlet Cold water inlet CH fl ow CH return Safety valve Premix fan Combustion chamber Gas injector Ceramic burner Flue outlet manifold Ferroli pump Heating fl... -
Page 31: Hydraulic Diagram
Optimax 25 C 4.3 Hydraulic diagram fi g. 21 Gas inlet Gas valve DHW outlett Safety thermostat Cold main inlet Exspansion vessel CH fl ow Motorised Diverting valve CH return Flow meter Heating safety valve Condensate outlet pipe Premix fan assembly... -
Page 32: Technical Data Table
Hot water circuit connections (with isolation valve fitted) Ø15 Maximum length of separate flues D=80* (*Measurement given in equivalent linear metres – cfr FERROLI calculation system) Electrical power supply Max electrical power absorbed Electric power drawn by the circulator (Speed I-II-III) -
Page 33: Diagrams
Optimax 25 C 4.5 Diagrams Head available for the system H [m H Q [l/h] 1.000 1.500 2.000 fi g. 22 1 - 2 - 3 = Pump selector positions (In order to obtain maximum hot water output the pump must be left in position 3). -
Page 34: Wiring Diagram
Optimax 25 C 4.6 Wiring diagram S4965V1018 DC F02.1 Ferroli pump C.h. fl ow temperature sensor Combination gas valve Overheat cut-off thermostat Spark electrode Ionisation electrode Diverting valve Water pressure switch Flowmeter Return sensor Flue temperature sensor TACHO Remove if... - Page 36 Should you require help during installation call our Technical Helpline on 08707 282 885 option 1 To book a Ferroli service engineer call Ferroli caresafe on 08707 282 885 option 2 Phone numbers: Installer Service Engineer BECAUSE OF OUR CONSTANT ENDEAVOUR FOR IMPROVEMENT DETAILS MAY VARY SLIGHTLY FROM THOSE QUOTED IN THESE INSTRUCTIONS.
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