Related Manuals for Ariston NEXT SFT 14
Summary of Contents for Ariston NEXT SFT 14
- Page 1 NEXT INSTANTANEOUS MULTIPOINT GAS WATER HEATER TYPE C NEXT SFT 14 Country of destination GB, IE...
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Page 2: Table Of Contents
User manual 1. General warnings ............3 1.1. CE labelling .............3 1.2. Safety regulations ...........3 2 User instructions.............4 2.1. Control panel ...........4 2.1.2. Display .............4 2.2. Initial set-up Ignition procedure ...........5 Water temperature adjustment ......5 Bath Function ..........5 Switchinf off procedure ........6 Appliance shut-off conditions ......6 Anti-freeze protection ........6 2.9. -
Page 3: Ce Labelling
1. general information 1. GENERAL INFORMATION 1.2. Safety regulations Key to symbols: The Next SFT Water Heater is a room sealed, fanned fl ue, mulitpoint water heater. Failure to comply with this warning implies the risk of The appliance has been designed for domestic use only and personal injury, in some circumstances even fatal to be connected to a mains cold water supply with a minimum Failure to comply with this warning implies the risk... -
Page 4: User Instructions
2. user instructions 2. Users Instructions 2.1. Control Panel Legend: Bath button ON/OFF button 3 & 4. Temperature Buttons( Used to select hot water delivery temperature. Display 2.1.2. Display - Water temperature indication (°C) - Signal error codes Water demand in progress Flame presence signal Fan active The display visualises the set... -
Page 5: Initial Set-Up
2. user instructions 2.4. Water temperature adjustment 2.2. Initial Set-Up Press keys 3 and 4 to set the hot water temperature. The new value will be indicated on the display IMPORTANT: The installing technician should explain to the user how the water heater works, the safety devices it includes and how to use it. -
Page 6: Switchinf Off Procedure
2. user instructions 2.6. Switching off procedure 2.7. Appliance shut-off conditions Press the ON/OFF button “2”, to switch off the appliance. The appliance is protected from malfunctions by means of The display indicates only two hyphens. internal checks performed by the electronic P.C.B., which To switch off the device completely, turn the external electric stops the appliance from operating if necessary. - Page 7 2. user instructions...
- Page 8 Installation and servicing instructions (Only for Gas Safe Registered Engineers) 6. Maintenances ............22 3. Installation ...............9 6.1. Servicing instructions ........22 3.1. Description of the appliance ......9 6.1.1 Replacement of parts ......22 3.2. Safety regulations .........10 6.1.2 To gain general access ......22 3.3.
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Page 9: Installation
3. installation 3.1. Description of the Appliance NEXT SFT water heaters are room sealed instantaneous gas fi red water heaters, with electronic ignition and ionisation safety devices, they have a modulating burner and are connected to the mains water supply; they provide domestic hot water. -
Page 10: Safety Regulations
3. installation 3.2. Safety regulations Make sure any rolling ladders are positioned securely, that they are suitably strong, that the steps are intact and not slippery and that the ladders are Key to symbols: fi tted with handrails on either side of the ladder and parapets on the landing. -
Page 11: Technical Specifi Cations
3. installation 3.3. Technical Specifi cation Model name : NEXT SFT 14 FF CE Certifi cation (pin) 0051CM4057 Type Gas category II2H3+ Maximum nominal heat input 28.0 Minimum nominal heat input Maximum nominal heat output 25.0 Minimum nominal heat output Domestic hot water temperature maximum °C Domestic hot water temperature minimum... -
Page 12: Operating Principle
FLAME Microswitch position Legend Detection Electrode Microswitch Gas valve Model Spark generator NEXT SFT 14 Air pressure switch Overheat thermostat Modulator Gas valve Thermal fuse 10. Water fl ow switch 11. Outgoing water temperature sensor 12. Inlet water temperature probe... -
Page 13: Maintenance
3. installation 3.6. Appliance Dimensions Ø100 Ø60 B. Hot water outlet 1/2” C. Gas inlet 3/4” D. Cold water inlet1/2” G. Drain valve Cold water inlet fi lter The following elements are supplied with the heater: 15mm inlet isolation complete with washer 15mmx1/2”... -
Page 14: Reference Standards
3. installation 3.8. Reference Standards 3.8.1. Flue In the United Kingdom, the installation and initial start up of Detailed information on fl ue assembly can be found in Section the water heater must be by a Gas Safe Registered installer in 4 “Fitting the Flue”. -
Page 15: Installing The Water Heater
3.8.7 Removing the Outer Case valve ever operate and it be found that a pressure limiting Loosen the screw behind the appliance that secures the outer valve is not fi tted, Ariston will not be held liable for any case; damage incurred. -
Page 16: Removing The Outer Casing
3. installation IMPORTANT!! E SURE TO REMOVE THE DISPLAY CABLE FROM THE PCB BEFORE COMPLETELY REMOVING THE CASING 3.8.8. Wall Mounting Fix the water heater to the wall using suitably sized screws using both brackets at high and low level. 3.8.9. -
Page 17: Fitting The Fl Ue
3. installation 3.9. FITTING THE FLUE The appliance must not be installed with a fl ue supplied by another manufactuer. The appliance is supplied ready for connection to a concentirc air intake and exhaust outlet system. IMPORTANT!! The fl ue duct must not be in contact with infl ammable materials, a seperation of at least 5mm must be between the fl... -
Page 18: Flue Extensions
fl ue clamps securely tightened. Ensure when extending the fl ue it is adequately supported (Ariston recommend 1 bracket per extension). Also, ensure that the fl ue is installed completely horizontally without dipping or sagging at the joints. -
Page 19: Fitting The Coaxial Flue (Ø 60/100 Vertical)
3. installation 3.9.4. Fitting the Coaxial Flue (Ø 60/100 Vertical) IMPORTANT!! The vertical starter with integral fl ue gas analysis point supplied with the fl ue kit must be used when terminating the fl ue vertically. Contents of vertical fl ue (3318645) Total length 1 x Vertical fl... -
Page 20: Commissioning
4. commissioning 4.4.1. Supply working pressure check 4. Commissioning 1. Close the gas isolation valve 2. Loosen screw “b” and attach the pressure gauge connection Once the water heater installation has been completed, it is pipe into the test nipple. necessary to commision the appliance as follows: 3. -
Page 21: Checking The Minimum Pressure
Gas Safe registered engineer. • Finally, leave these instructions with the end user. 4.5 Gas settings table NEXT SFT 14 lower Wobbe index (15°C, 1013 mbar) MJ/m 45.67 70.69... -
Page 22: Appliance Shut-Off Conditions
5. appliance protection devices 5. Appliance shut-off conditions The appliance is protected from malfunctions by means of internal checks performed by the electronic P.C.B., which stops the appliance from operating if necessary. In the event of the appliance being shut off in this manner, a code appears on the control panel display which refers to the type of shut-off and the reason behind it. -
Page 23: Servicing Instructions
1. general information 6.1 Servicing instructions To ensure effi cient safe operation, it is recommended that the water heater is serviced annually by a competent person. Before starting any servicing work, ensure both the gas and electrical supplies to the water heater are isolated and the water heater is cool. -
Page 24: Maintenances
6. maintenance A reading less than or equal to 0.008 following a service is 2. Remove the front cover. a good indication that an appliance is operating safely and Pay attention to disconnect the display from the will continue to operate until the next planned service main PCB at the main PCB. -
Page 25: Removing The Air Pressure Switch
6. maintenance 6.1.3 Removing the air pressure switch 6.1.4 Removing the fan 1. Remove the 2 screws from the chassis 1. Release the 2 the two fan fi xing screws, and remove the silicon pipe Remove the silicon pipe from the APS Disconnect the electrical connection from the main pcb Disconnect the electrical connection from the... -
Page 26: Removing The Gas Collector
6. maintenance 6.1.5 Removing the gas collector assembly Remove the gas collector 1. Remove the earth connection 1. Release the 7 screws on the gas collector 6.1.6 Removing the ignitor 1. Disconnect the electrical connections 3. Release the screw also dismounts the igniter bracket 2. -
Page 27: Removing The Ignition Electrode
6. maintenance 6.1.8 Removing the detection electrode Release the fi xing screw Remove the spark generator 1. Release the 2 screws 2. Remove the electrode and disconnect the electrical connection 6.1.7 Removing the ignition electrode 1. Release the 2 screws 2. -
Page 28: Removing The Overheat Thermostat
6. maintenance 6.1.9 Removing the overheat thermostat 6.1.10 Removing the hot water temperature probe 1. Remove electrical connections 1. Remove the electrical connection 2. Release the 2 screws and remove the overheat thermostat 2. Turn off the cold water isolation valve 3. -
Page 29: Removing The Water Fl Ow Switch
6. maintenance 6.1.11 Removing the inlet water temperature probe 6.1.12 Removing the water fl ow switch 1. Disconnet electrical connection 1. Release the screw and disconnect the electrical connection 2. Turn off the cold water isolation valve and drain the appliance 3. -
Page 30: Removing The Inleft Water Fi Lter
6. maintenance 6.1.13 Removing the inlet water fi lter 6.1.4 Removing the main P.C.B. 1. Release the fi lter 1. Release the 2 screws and dismount the PCB 2. Remove the fi lter 2. Remove all electrical connections from the PCB... -
Page 31: Removing The Display Pcb
6. maintenance 6.1.15 Removing the display P.C.B. Release the 4 screws fi xing the cover of the main PCB and remove the other connection cables 1. Unhook the control panel and release the fi xing screws... -
Page 32: Removing The Gas Valve
6. maintenance 6.1.16 Removing the gas valve 6.1.17 Removing the burner/heat exchanger 1. Remove the gas collector as detailed in 6.1.5 1. Remove electrical connections 2. Release the screw, release the silicone pipe from the fan assembly and remove the gas valve 2. - Page 33 6. maintenance 3. Disconnect the clips of the two pipe. 4. Remove the fan as detailed in paragraph. 6.1.4 Isolate the cold water inlet and drain the applianc 5. Release the 4 screws and dismount the heat exchanger, burner and combustion hood. 6.
- Page 34 6. maintenance 8. Release the screws to dismount the burner from the heat exchanger...
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Page 35: Fault Fi Nding Chart
6. maintenance 6.4 Fault fi nding chart PRELIMARY CHECKS Make sure that: 1 - The mains water supply is turned on 2 - The gas is turned on 3 - The electrical supply is turned on PRESS THE ON/OFF BUTTON DRAW OFF WATER >2.5 l/min IS THE AIR º... - Page 36 6. maintenance FAULTS POSSIBLE CAUSES THERE STILL A PROBLEM? - check gas pressure Drawing D.H.W.: - check water flow rate insufficient hot water - check the temperature sensors temperature - check heat exchanger - check exchanger faulty or Drawing D.H.W.: lime-scale deposits noisy operation NORMAL...
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Page 37: Short Spares List
6. maintenance SHORT SPARES LIST Temp Sensor 977227 Overheat Thermostat 65158036 Water Flow Sensor 65158445 Ignitor 65158405 Detection Electrode 65158248 Ignition Electrode 65158357 Gas Valve 6518231 Air Pressure Switch 10259000 Fan Assembly 65158259 PCB (Main) 65158542 PCB (Display) 65158540 Cable (Display Panel) 65158537... - Page 38 6. maintenance...
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Page 40: Terms And Conditions Of Guarantee
Failure to do A charge will be made to the owner of the appliance if: so will invalidate your guarantee and should an ARISTON · The reason for any service visit is as a direct result of...