Strebel S-FX 125 Installation Operating & Maintenance Manual Download

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7 BOILER SHUNT PUMP

The S-FX boilers do not have an internal shunt pump therefore using the following graphs, select a pump that is
compatible with the hydraulic resistance of the boiler and the system against the required flow rate.

7.1 S-FX 70 & 125 Hydraulic graph

7.2 S-FX 220 & 320 Hydraulic graph

It is recommended to observe the water flow rates in the table and as specified below.

DESCRIPTION

S-FX 70

S-FX 125

S-FX 220

S-FX 320

Water flow

rate ΔT 10

5.52

9.77

17.49

25.29

m3/h

Water flow rate ΔT 20

2.76

4.89

8.74

12.64

m3/h

Water flow rate ΔT 40

1.38

2.44

4.37

6.32

m3/h

Summary of Contents for S-FX 125

Page 1: ...0 125 220 320 Floor Standing High Efficiency Condensing Boiler Installation Operating Maintenance Manual Please read and understand before commencing installation and leave the manual with the customer for future reference 2019 07 01 v1 ...

Page 2: ......

Page 3: ... 6 14 INSTALLING A STRAINER AND OR DIRT SEPARATOR 19 6 15 PLASTIC PIPING IN THE HEATING SYSTEM 19 7 BOILER SHUNT PUMP 20 7 1 S FX 70 125 HYDRAULIC GRAPH 20 7 2 S FX 220 320 HYDRAULIC GRAPH 20 8 FLUE GAS AND AIR SUPPLY SYSTEM 21 8 1 GENERAL 21 8 2 S FX EXHAUST FLUE CONNECTION 22 8 3 PLANTROOM COMBUSTION AIR 23 8 3 1 Air contamination 23 8 4 BOILER CATEGORIES TYPES OF FLUE GAS SYSTEMS 24 8 5 FLUE TE...

Page 4: ... FX Information Menu 47 11 S FX CASCADING 48 11 1 SYSTEM SETUP 48 11 2 BOILER CASCADE COMMUNICATION SETUP 48 12 NATURAL GAS TO LPG CONVERSION 49 12 1 PART 1 FITTING THE LPG CONVERSION KIT 49 12 2 PART 2 SOFTWARE CHANGE 49 13 COMMISSIONING THE BOILER 50 13 1 FIRST FLUSHING THE BOILER WITH WATER 50 13 2 SECOND FILLING VENTING THE BOILER AND THE SYSTEM 50 13 3 THIRD CHECK THE WATER FLOW 50 13 4 MOUNT...

Page 5: ...5 18 1 SAFETY GUIDELINES 66 18 2 TO TURN OFF GAS TO THE APPLIANCE 66 18 3 MAINTENANCE AND INSPECTION 66 ...

Page 6: ...ghts the burner Do not try to light the burner by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor C Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system a...

Page 7: ... Key Approved Documents to the Building Regulations in the region of the United Kingdom that this product is being installed The Local Building Regulations and Local water by laws the gas services area and the Local Authority recommendations The appropriate British European Standards for the type of installation and fuel used including but not exclusively the following standards o BS 5440 Part 2 F...

Page 8: ... remote burner input control Outdoor temperature sensor External calorifier pump or diverter valve Boiler pump System pump External flow switch or external safety device External system sensor DHW indirect sensor or DHW control thermostat Cascade control When using the integrated cascade control a maximum of six boilers can be controlled in a cascade configuration Using an appropriate external con...

Page 9: ...FICIENCY Efficiency Full Load 100 NCV 98 20 97 80 98 30 98 40 Efficiency Full Load 30 NCV 109 5 109 6 109 4 109 6 Seasonal Efficiency Part L GV 96 76 96 77 96 70 96 88 GAS CONSUMPTION Values min max Natural gas G20 m3 h 1 48 6 93 2 43 12 28 4 34 21 9 6 56 31 64 Propane G31 1 kg h 1 09 5 09 1 79 9 01 3 19 16 06 4 82 23 23 Gas supply pressure nominal 2 G20 mbar 20 G31 mbar 37 EMISSION Values min max...

Page 10: ...ation heater No No No No Unit Value Value Value Value Rated heat output kW 64 114 204 295 P rated P4 at 60 80 C kW 64 4 114 0 204 0 294 5 Heat output P1 30 at 30 37 C kW 12 8 24 2 41 6 60 6 Seasonal space heating energy efficiency ɳs 94 0 94 0 94 0 94 0 Energy efficiency ɳ4 at 60 80 C 88 5 88 1 88 6 88 7 Energy efficiency ɳ1 at 30 37 C 98 7 98 8 98 6 98 8 Auxiliary electricity consumption At full ...

Page 11: ...11 4 BOILER DIMENSIONS 4 1 S FX 70 4 2 S FX 125 ...

Page 12: ...12 4 3 S FX 220 4 4 S FX 320 ...

Page 13: ...heat demand The sound emissions are quite low from the boiler but be aware that some noise is produced 3 You need a power supply of at least 230V 50 Hz with an earth connection and may need a supply of 400V 50Hz depending on the pump We advise to install a separate safe working switch on which all poles are switched externally so one can work on the boiler while having all the wiring free of suppl...

Page 14: ... S FX 320 Flow Connection Size 1 Threaded 1 Threaded 2 Threaded DN65 Flanged PN16 Primary Return Connection Size 1 Threaded 1 Threaded 2 Threaded DN65 Flanged PN16 Secondary Return Connection Size 1 Threaded 1 Threaded 2 Threaded DN65 Flanged PN16 Gas Connection 3 4 1 1 1 ...

Page 15: ...moveable part For the burner door to be opened the gas pipe connecting into the gas connection on the boiler will need to be removed Therefore it is suggested that either The last section is a stainless steel hose with an isolation valve fitted gas pipe example above The last section of gas pipe work has breakable unions with an isolation valve fitted S FX S FX 70 S FX 125 S FX 220 S FX 320 Gas Su...

Page 16: ...Threaded DN65 Flanged PN16 If the secondary return connection is NOT used then this must be blanked off by the installation before filling the S FX appliance The hydraulic connections are Connection A Supply Flow Connection Connection B High Temperature Secondary Return Connection Connection C Low Temperature Primary Main Return Connection Each return hydraulic connection has a premade pocket for ...

Page 17: ...Alphi 11 X500 Tightness Leaker Sealer F4 6 6 Condensate Drain The condense drain is supplied loose within the S FX boiler casing on delivery please connect before operating the boiler The condensate drain is placed at the centre and at the bottom of the boiler and has a hose discharge Connect this flexible hose to the sewer system Use only plastic parts with the condensate drain Metal lines are no...

Page 18: ...unction The boiler flow will also be influenced when a pipe of the heating system is frozen blocked Make sure all heating pipes are free from the risk of frost If there is the risk of freezing of the heating system all the pipe section must be insulated and or protected with the help of a tracing 6 11 Frost protection The boiler has a built in frost protection that is automatically activating the ...

Page 19: ...oxygen barrier e g under floor heating system are used in the central heating system these should be separated from the boiler system by using a plate heat exchanger Diffusion through the plastic can cause air to enter the heating system This could damage the boiler pumps and other components in the system Be aware that plastic piping is often used in under floor heating systems When no measures h...

Page 20: ...r and the system against the required flow rate 7 1 S FX 70 125 Hydraulic graph 7 2 S FX 220 320 Hydraulic graph It is recommended to observe the water flow rates in the table and as specified below DESCRIPTION S FX 70 S FX 125 S FX 220 S FX 320 Water flow rate ΔT 10 5 52 9 77 17 49 25 29 m3 h Water flow rate ΔT 20 2 76 4 89 8 74 12 64 m3 h Water flow rate ΔT 40 1 38 2 44 4 37 6 32 m3 h ...

Page 21: ... high efficiency approved stainless steel or plastic flue system These materials including the gaskets should be usable for positive pressure flue gas systems and have a temperature class of T120 Meaning the parts must be certified for use at temperatures of minimal 120 C See also warnings below Note In general gas heaters are certified with their own flue gas material The gas heater must be provi...

Page 22: ... ducts and flues must be suitably sized designed and made in compliance with the current regulations They must be made of suitable materials i e resistant to heat and corrosion smooth on the inside and tight In particular the internal flue gaskets must be condensate proof Before proceeding with the flue installation check and carefully comply with the local regulations and provisions Every unit ha...

Page 23: ...laundry room or pool facility for example these areas will always contain hazardous contaminants To prevent the potential of severe personal injury or death check for areas and products listed in the list below with contaminants before installing the boiler or air inlet piping If contaminants are found you MUST remove contaminants permanently or relocate air inlet and vent terminations to other ar...

Page 24: ...d hot water boilers of rated inputs between 70kW 1 8MW Please refer to the Instition of Gas Engineers and Manager Documents IGEM IGEM UP 10 Edition 4 Installation of gas fired hot water boilers of rated inputs between 70kW 20MW Appendix 9 Risk Assessment for Postioning of Horizontal Flues Terminations 8 5 2 VERTICAL FLUE TERMINAL POSITIONING Please refer to the relevant British Standards BS 5440 2...

Page 25: ...formula shown in chapter 8 4 1 titled figure 12 line G to an area where vehicles could be parked 5 Is the suggested flue terminal location within the distance of the formula shown in chapter 8 4 1 titled figure 12 line G of any trees branches or shrubs 6 Is the suggested flue terminal location within the distance of the formula shown in chapter 8 4 2 titled figure 7 line Y to a wall when enclosed ...

Page 26: ...into a dwelling Not Recommended K Vertically from a terminal on the same wall 2500mm L Horizontally from a terminal on the same wall Exhaust Only No Minimum Distance M Above an opening into the building 7 232 x kW net input 93 708 N Horizontally to an opening into the building 7 232 x kW net input 93 708 P Above a flat roof Obstacle 2500mm 7 232 x kW net input 93 708 P Above a flat roof Obstacle 2...

Page 27: ...ed by tightening the cable gland at the bottom of the boiler casing In case of a flexible cable use crimp ferrules on each wire end for the terminal connections The minimum cross section of the wires in the power supply cable is 3 x 1 0 mm2 As it is a stationary appliance without means for disconnection from the supply a contact separation in all poles that provide full disconnection under voltage...

Page 28: ...28 9 4 Electrical Schematics S FX 70 ...

Page 29: ...29 S FX 125 ...

Page 30: ...30 S FX 220 320 ...

Page 31: ...ascade Connection Emitter 362 Cascade Connection Receiver Room Thermostat Connections 72 72b The room thermostat connecters are volt free connections Connecting 230v to these terminals will damage the main PCB boards 72 Room Thermostat Terminals 21 22 72b Second Room Thermostat Terminals 27 28 Advisory When connecting a remote timer control or a timer switch do not take the power supply for these ...

Page 32: ...uired Parameter Changes Every system requires different parameter settings for the above system change the following parameters Configuration Type Parameter B02 Set to 8 for 70 125 320 models Set to 5 for 220 model Parameter B08 Set to 1 System Type Parameter P 09 Set to 1 72 Room Thermostat 1st Zone 72b Room Thermostat 2nd Zone 138 Outside Sensor 307 Heating Pump 1st Zone 306 Heating Pump 2nd Zon...

Page 33: ...H PHE Legend Required Parameter Changes Every system requires different parameter settings for the above system change the following parameters Configuration Type Parameter B02 Set to 8 for 70 125 320 models Set to 5 for 220 model Parameter B08 Set to 1 System Type Parameter P 02 Set to 1 Parameter P 09 Set to 1 32 Common Heating Pump 72 Room Thermostat 138 Outside Sensor 155 DHW Tank Sensor 348 3...

Page 34: ...g parameters Master Boiler Slave Boilers Configuration Type Parameter B02 Set to 8 for 70 125 320 models Set to 5 for 220 model Parameter B08 Set to 3 System Type Parameter P 02 Set to 1 Parameter P 09 Set to 1 72 Room Thermostat 138 Outside Sensor 155 DHW Tank Sensor 298 Cascade Flow Temp Sensor 130 DHW Primary Pump 306 CH Heating Pump 300M Master Butterfly Valve 300S Slave Butterfly Valve I ISPE...

Page 35: ...It can be installed in place of the room thermostat 72 300 Burner On Indication Volt Free Contact The example shows a 230v connection 301 Fault Indication Volt Free Contact The example shows a 230v connection 302 Remote Reset Option The example shows a double pole switch at 230v 357 Fault indication 230v Output on Terminal 16 ...

Page 36: ...t Button 12 Main Menu Button 13 Home Button Back to Main Screen 14 On Off Main Switch 10 1 1 DISPLAY ICONS The following table gives a short description of the icons that can be visible on the main screen during operating Winter Operation Mode Selected Heating Summer Operation Mode Selected DHW Only Holiday Mode Activated Automatic Operation Selected Heat Demand Active Pump Running Burner Burning ...

Page 37: ... would advise checking the contrast of the display and change if required To adjust the contrast press and hold together contextual button number 2 and OK To increase to contrast press the UP arrow number 5 and to decrease the contrast press the down arrow number 7 Once this is satisfactory press the OK button to confirm the change 10 2 3 TURNING OFF THE BOILER DISPLAY From the home display press ...

Page 38: ...cture To access the User Menu Structure from the home screen press the main menu button number 12 and then the contextual button 1 as shown in the below diagram The following chapters will explain each of the above settings ...

Page 39: ... ADJUSTMENT TEMPERATURE Using the contextual buttons 1 and 2 the reduction adjustment temperature can be changed This ranges from 0c to 50c Once the setting has been set press OK to confirm Sliding Temperature This parameter is active once an outside temperature sensor has been installed to the S FX boiler With this sensor installed the flow temperature of the heating system is adjusted according ...

Page 40: ... the offset of the OTC curve can be set This ranges from 20 to 60 and corresponds with curve the two below examples showing an offset of 20 and an offset of 60c Once the setting has been set press OK to confirm As an example using an offset of 20 with the OTC curve set to 9 will give a maximum flow temperature of 80c with the outdoor sensor reading 0c temperature Outdoor Temperature Off This param...

Page 41: ...la Day Select the day of the week for this programme to run Time of Anti legionella Select the time for this program to run Anti Legionella Duration Select the duration in minutes this program runs for Anti Legionella Temperature Select the DHW temperature this program runs to Once all settings are set press the OK button to confirm 10 3 3 TIME PROGRAMMING This is to be set within the S FX boilers...

Page 42: ...next day with the same time periods using the navigational up down arrows and the OK button Select copy to next day 10 3 4 HOLIDAY FUNCTION This parameter can be accessed by USER MENU HOLIDAY FUNCTION Using the contextual buttons 1 2 and the OK button set the following two parameters Holiday Start Date Holiday End Date Whilst in holiday mode the S FX boiler will act in Summer mode therefore will n...

Page 43: ... by one and press the OK button to confirm each number 10 4 1 TO ACCESS THE PARAMETERS After entering the technical pass code and pressing OK you will be able to enter the boiler parameters to set up the S FX boiler based on the design of the system Using the contextual buttons 1 2 and the OK button highlight the top left hand icon and press the OK button 10 4 2 TO ACCESS THE CONFIGURATION TRANSPA...

Page 44: ... to 7 210 Hz 200 Hz 180 Hz 190 Hz b05 Max Fan Freq in CH mode With b02 set to 4 With b02 set to 7 210 Hz 200 Hz 180 Hz 190 Hz b06 Min Fan Freq in CH DHW mode With b02 set to 4 With b02 set to 7 50 Hz 50 Hz 50 Hz 50 Hz b07 Min Fan Freq offset With b02 set to 4 With b02 set to 7 40 Hz 40 Hz 40 Hz 40 Hz b08 Function of Variable Output Relay 0 Burner On 1 Legionella Pump 2 Boiler Room Ventilation 3 Mo...

Page 45: ...nute 5c min 5c min 5c min 5c min P16 DHW Delay Time 0 255 Seconds 120 120 120 120 P17 DHW Pump Overrun 0 255 Seconds 30 30 30 30 P18 Min DHW Setpoint With b02 set to 1 4 or 7 With b02 set to 2 3 5 6 8 9 Not Used 10c Not Used 10c Not Used 10c Not Used 10c P19 Max DHW Setpoint With b02 set to 1 4 or 7 With b02 set to 2 3 5 6 8 9 Not Used 65c Not Used 65c Not Used 65c Not Used 65c P20 Max Output in D...

Page 46: ... 95 5 5 5 5 P 09 Low Loss Header Function 0 Disabled 1 Enabled 0 0 0 0 P 10 Fill System Function 0 Disabled 1 Enabled 0 0 0 0 P 11 Select 3 Way Valve 0 2 or 3 Wire 1 3 Wire 0 0 0 0 P 12 0 10v On Temp Off Voltage 0 10v 2 5v 2 5v 2 5v 2 5v P 13 0 10v On Temp On Voltage 0 10v 3 0v 3 0v 3 0v 3 0v P 14 0 10v On Temp Max Voltage 0 10v 10 0v 10 0v 10 0v 10 0v P 15 0 10v On Temp Min Temp 0 100c 20c 20c 20...

Page 47: ...ng Pump ON OFF Heating 3 Way Valve ON OFF DHW 3 Way Valve ON OFF Standby Time ON OFF T Delta Protection ON OFF Flame Supervisor ON OFF Heating Sensor 1 C Heating Sensor 2 C Return Sensor C DHW Sensor C External Probe Outside Temperature C Fume Sensor Flue Gas Sensor C Cascade Heating Sensor C Fan Frequency Hz Burner Load System Water Pressure 1 4 bar ON 0 0 bar OFF Modulating Circulating Pump Casc...

Page 48: ...ystem to work for cascade the communication must be wired up between all boilers into the relevant terminals 31 to 36 Below example is of three S FX boilers linked together Boiler A is the Master Boiler Boiler B is the Slave 1 Boiler Boiler C is the Slave 2 Boiler Once all the electronical wiring has taken place turn on the electrical supply to all S FX boilers and allow them to go through there d...

Page 49: ...onnections from the gas valve controller Undo the fixing screws E and remove the gas valve Replace the gas nozzle F positioning it inside the seal G with the one contained in the conversion kit Refit the gas valve and check the tightness S FX 70 S FX 125 S FX 220 S FX 320 12 2 Part 2 Software Change This change can be completed through the user menu using the contextual buttons 1 2 the navigationa...

Page 50: ...with DIN 4726 4729 If not make sure that the boiler circuit is separated from the heating circuit by a plate heat exchanger This way no oxygen that entered the heating system through these pipes can reach the boiler Check the total heating system for any leaks This to prevent oxygen entering the system through these leaks The boiler has an automatic air vent situated inside the boiler This vent is...

Page 51: ...ions A new boiler is installed As part of a service maintenance check in case the CO2 values turns out to be incorrect The gas valve has been replaced Gas conversion from natural gas to LPG or LPG to natural gas The venturi has been replaced The fan has been replaced The flue gas check valve has been replaced In any of the cases described always check the gas air ratio of the combustion figure CO2...

Page 52: ...ifications datasheet at the beginning of this manual Gas Type G20 The CO2 level may never be in the hatched area S FX 70 ____________________________________________________________________________ S FX 125 220 ____________________________________________________________________________ adjust adjust adjust adjust max load min load 9 4 9 2 8 9 8 7 CO2 O K O K adjust adjust adjust adjust max load m...

Page 53: ..._______________________________________________________ S FX 125 220 320 ____________________________________________________________________________ adjust adjust adjust adjust max load min load 9 1 8 9 8 6 8 4 CO2 O K O K adjust adjust adjust adjust max load min load 10 4 10 2 9 9 9 7 CO2 O K O K adjust adjust adjust adjust max load min load 10 6 10 4 9 8 9 6 CO2 O K O K ...

Page 54: ...normal operation 14 3 High Low Fire Adjustment 14 3 1 ADJUSTING THE BURNER AT HIGH FIRE 1 From the home screen go to User Menu Maintenance Test Mode Test Mode 2 Press contextual button 1 until burner power is 100 The boiler will fire up after about 10 seconds the boiler burns at high fire 3 Measure the CO2 percentage 4 Using the Gas Max adjustment screw set the combustion to the require CO2 valve ...

Page 55: ...ckwise to increase CO2 14 4 Heating Capacity Adjustment Range Rated As factory set all S FX boilers are range rated to 80 which can be seen within the transparent menu P14 Heating power Adjustment Diagram This is a Range Rated boiler according to EN 483 and can be adjusted to the systems thermal requirement by setting the maximum heating capacity for operation in heating mode Put the S FX boiler i...

Page 56: ...Both modules will light and operate up to their maximum heating power The display as shown on the right will show the actual heating power 5 Actual Heating Power 1 2 Module Lit Modules Connected Press the contextual buttons 1 2 to increase decrease the burner power To deactivate this test press contextual button 3 or alternately after 15 minutes the test will automatically finish Do not turn off t...

Page 57: ... rear to ensure that the condensate drains from the heat exchanger YES NO Condensate trap from package installed according installation manual YES NO Inside diameter of drain piping mm inch Is there a definite air gap between the condensate trap and the connection to drain pipe YES NO Total drop in height from boiler to drain piping exit point Any additional trap points YES NO Perform PH test and ...

Page 58: ...ing Ratio Gas supply Type of Gas from installation Is gas isolation valve installed under boiler according to installation manual YES NO Which diameter gas isolation valve is installed Gas piping inside diameter Gas piping material if possible specify mark type Gas piping flexible YES NO YES NO Gas piping inside structure e g smooth corrugated Measured Gas pressure Gas valve Static Measured Gas pr...

Page 59: ...ervice agency or the gas supplier Apart from the maintenance proceedings it is required to maintain a service log for each boiler that includes all of the following information Serial number Date and time of maintenance Name of maintenance engineer Which parts were exchanged during maintenance Which settings software were changed during maintenance Special remarks findings Future aspects that need...

Page 60: ...ompleting the following steps To Open the Door Disconnect the gas pipe from the gas valve see chapter 6 2 Gas Connection Undo and remove the four nuts washers These are located in each corner of the square burner door Once removed the burner door can then be lifted from front to back Once opened using the support arms to hold the burner door open and lock it into place by inserting a locking pin a...

Page 61: ...n the blades or else the fan might be out of balance and run irregularly causing noises and fan failures Check the fan also for any water damages In doubt always replace the fan of the boiler Condensate Trap Disassemble the condensate trap and clean every part of it Check the condensate trap connection of the heat exchanger for any blocking or pollution and clean it if necessary Check the function...

Page 62: ...lities are found by the service technician during service and maintenance and these are not repairable this information should be reported to the owner end user of the installation Also the owner end user should be advised how to fix these faults and these faults should be reported in the service report log file of the boiler During service and maintenance the gas supply air flue gas and condensat...

Page 63: ...as Check gas piping test for leaks and signs of aging Record gas pressure and note pressure drop upon start up Record CO2 at high and low fire Visual and Temperature Do visual inspection of all system components and verify programmed temperature settings Connections Check wire connections and make sure they are tight Combustion chamber Check burner tube and combustion chamber coils Clean with nylo...

Page 64: ...ondensate Trap Check the trap and clean if required Faulty Ignition Transformer Only on 220 320 models Test and replace if necessary A02 Flame Signal Electrode Fault Check wiring replace if required with Burner Off Ignition PCB Board Fault Check PCB replace if required High Limit Faulty High Limit Sensor Check the high limit sensor A03 Temperature No Flow Through Boiler Check the circulating pump ...

Page 65: ...ty Fault Flue Sensor Wiring Disconnected No 230v Power Supply Check the 3 pin plug on the fan F15 Fan Fault No Tacho Signal Check the 5 pin plug on the fan Fan Damaged Replace fan Reset button on Reset Button on Controller Fitted on Check the reset button and replace the F26 Controller on Gas Gas Valve is Blocked or Faulty controller on the gas valve if necessary Valve Fault F34 Supply Voltage Sup...

Page 66: ...he appliance and to replace any part of the control system and any gas control which has been under water Warning Improper installation adjustment alteration service or maintenance can cause property damage personal injury exposure to hazardous materials or loss of life Installation and service must be performed by a qualified installer service agency or the gas supplier who must read and follow t...

Page 67: ...67 BLANK PAGE ...

Page 68: ...22 F 01276 685405 E info strebel co uk I www strebel co uk STREBEL LTD RESERVE THE RIGHT TO CHANGE ANY SPECIFICATIONS ON THIS BOILER RANGE WITHOUT NOTICE Further information on our complete product range is available from our website CAST IRON CONDENSING STEEL SHELL WATER HEATERS RENEWABLES FLUES ACCESSORIES ...

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