Strebel SC-B Wall-Hung Condensing Boiler
Contents
1. 34 Remove the burner control from the boiler by a Removing the ignition cable from the electrode and remove the cable from the console b Removing the wiring from the spiral 1X2 pole plug 1X8 pole plug and the 230V plug right side of the front Unscrew the facia 4x remove the burner control and replace it 35 Replace when bending take care as bending near the burner plate may give a risk of cracking 36 Dry using a hairdryer as necessary and check if working Replace as necessary 37 See 36 38 See 36 Remove the connection and blow dry using a hairdryer 39 See 36 Remove the connection and blow dry using a hairdryer 40 The plug wire connection must point to the outside of the fan and one side should fit into the groove on the PCB 41 Check plugs and fit into one another correctly 42 Check cables for possible damage or being trapped and replace as required 43 Check connections or replace sensor 44 Check the seal of the heat exchanger on the flue gas casing and replace as required fit a new rotary lip seal 45 Check flow and DHW Pipes 46 Turn the pump switch to position 3 47 Check if the sensors are interchanged 48 Possibly replace the fuse must be a reason for the defect there is no spare fuse present see diagram on page 26 49 Possibly replace fuse must be a reason for the2. 1 2 3 4 5 6 7 8 f S PWM N12 CN ogee O40 External S volt tank circuit Mains 230 VAC 7 ch SS ee Fig 2 Electrical circuit diagram Page 24 of 51 8 PUTTING INTO OPERATION ce 8 1 Control panel Available control elements for the user also see 8 4 and 8 41 on page 28 Control Console 1 2 Pressure Gauge 0 to 6 bar Filling pressure minimum 0 5 bar Control knob with indication CH Setting maximum Flow temperature a With this knob the max flow temperature of the Central Heating can be adjusted even when using 0 to 10 volt control b The set temperature will always be displayed unless an outside sensor is fitted c When an outside temperature sensor is connected the set heating curve temperature will be displayed this set heating temperature can be shifted within limits 10 and 10 C The Display Shows the set flow temperature or when 0 to 10 volt control is used the temperature dictated by the voltage example 10 volts equals maximum temperature see 2a above Where an outside temperature sensor is fitted the compensated temperature is shown Exception lock out and other faults When there is a Lock out situation the cause of this Lock out is shown in a code on the display The code is flashing on and off Green LED named Flame When the burner is working and firing properly there is ionisa
3. Resistance of the different parts of the inlet system Standard Flue pipe can be used for the air inlet Bend 90 equal to 1 meter straight tube of the same diameter Bend 45 equal to 0 5 meter straight tube of the same diameter Cascade T piece on top of the boiler equal to 1 meter straight tube Parallel Roof amp wall terminal air inlet resistance is equal to 1 meter straight length of same size See sample calculation page 16 Install horizontal Flue parts under 1 fall in the direction of the boiler one centimetre for every linear metre Page 14 of 51 6 5 3 Single amp Cascade Table Resistance of the Flue in Pa m SIZE 80mm 100mm 130mm 150mm 180mm 200mm 250mm Output kW_ Pa m Pa m Pa m Pa m Pa m Pa m Pa m 60 5 2 90 8 4 1 120 15 6 1 5 0 6 150 26 9 2 1 0 5 180 12 3 1 5 0 6 210 15 4 2 0 8 240 20 5 5 2 5 1 270 25 7 3 1 2 0 8 300 8 5 3 5 1 5 0 9 330 10 4 1 7 1 1 360 11 4 5 2 1 3 390 12 6 2 3 1 5 420 13 7 2 5 1 7 450 15 8 3 1 9 X 480 17 9 3 5 2 1 X 510 19 10 4 2 3 X 540 21 11 5 4 5 2 5 X 570 23 13 5 2 8 0 8 600 27 14 5 6 3 0 9 630 28 16 6 3 3 3 1 0 660 30 17 5 6 5 3 7 1 2 690 19 F 4 0 1 4 720 20 5 7 5 4 3 1 5 750 22 8 2 4 6 1 6 780 23 8 4 4 9 1 7 810 24 8 7 5 2 1 8 840 25 9 5 6 1 9 870 26 9 5 6 2 1 900 27 10 1 6 4 22 930 28 10 6 6 8 23 960 29 12 7
4. Page 35 of 51 11 2 Troubleshooting table Numbers are corresponding with Table 7 Table 7 Troubleshooting table 1 Check cable or replace the cable check that the cable is connected to the correct connector strip DE Replace room thermostat or cable has the correct thermostat been used 3s Replace sensor or find cable fault 4 Try and loosen the pump spindle or replace the pump drive 5 Add water and detect leak also check the expansion vessel for leaks 6 Too much water added drain check the pressure in the expansion vessel for correct air cushion pressure only check with 0 water pressure replace the expansion vessel if defective Te Place the plug with the cables on the fan side 8 Clean the fan blades 9 Replace the fan 10 Open gas valve 11 Check line and gas meter make a resistance calculation as required 2 Change gas lines 13 14 Check fuse F4 check all 230 V connections pump PCB 115 16 See paragraph 6 4 I Check the cabling using the wiring diagram check the connection to the gas valve be aware of moister 18 Check cable for short circuit overheating nearby or jammed between steel plate check spark plug cap for cracks replace cap 19 Replace the burner control 20 Moister trapped check the cable sockets which should fit tightly around the plug pins check the position of the cabl
5. 47 48 49 50 Page 3 of 51 1 SAFETY GUIDELINES Read all these instructions before commencing installation This appliance is free from any asbestos material It is the law that all gas appliances and fittings are installed by a competent person such as a CORGI registered installer and in accordance with the Gas Safety installation and Use Regulations the relevant British standards for installation codes of practice or rules in force and in accordance with the Manufactures instructions The installation shall also be carried out in accordance with the following regulations codes and standards The Building Regulations issued by the Department of the Environment The Building Standards Scotland Consolidation Regulations issued by the Scottish Development Department The Local Building Regulations and Local water by laws the gas services area and the Local Authority recommendations Wiring to the appliance must be in accordance with the IEE BS 7671 Wiring Regulations the Health and Safety Document No 635 The Electricity at Work Regulations 1989 and any local regulations that apply Relevant British standards insofar as the relevant areas that are not covered by these instructions BS 5440 Parts 1 and 2 Flues and Ventilation CP 342 Part 2 1994 Code of practice for centralised hot water supply buildings other than individual dwellings British Gas Publications IM 2 purging procedures IM 5 sou
6. 8 Diverter valve E04 000 041 9 Mounting frame with flow return and gas tube see CASCADE Manual Page 50 of 51 Declaration of Conformity Under the EC DIRECTIVE on machinery 89 392 EEC 91 386 EEC 93 68 EEC and the EC DIRECTIVE ON ELECTROMAGNETIC COMPATIBILITY 89 336 EEC 91 263 EEC 92 3 1 EEC 93 68 EEC have been constructed in conformity with the applicable provisions of the EC DIRECTIVE on machinery and the EC DIRECTIVE on EMC Strebel Ltd Page 51 of 51
7. 3 2 4 990 30 13 8 0 2 5 1020 31 14 8 8 2 6 Resistance of the different parts of the inlet system Bends 90 equal to 1 meter straight flue of the same diameter Bends 45 equal to 0 5 meter straight flue of the same diameter S T piece on top of the boiler is equal to 1 meter straight flue Co axial flueing roof and wall terminal see page 13 Parallel Roof amp wall terminal flue resistance is equal to 1 meter straight length of same size e See sample calculation page 16 Install horizontal Flue parts under 1 fall to the boiler one centimetre for every linear metre Page 15 of 51 6 6 Example of a Flue Resistance Calculation Boilers 4x150kW 1x 180 kW Total 780 kW Horizontal air inlet 5 meter Vertical air inlet to the roof 8 meter T pieces over the boilers 4 Number of bends 90 2 Roof terminal 1 Air inlet Choosing a diameter of 180 mm Resistance Horizontal duct 5 meter 5 x5 8 29 0 Pa Vertical duct 8 meter 8 x 5 8 46 4 Pa Bends 90 x 2 2x58 11 6 Pa T pieces x 4 4x5 8 23 2 Pa Roof terminal 5 8 5 8 Pa Total 116 Pa Flue gas exhaust Choosing a diameter of 180 mm Resistance Horizontal flue 5 meter 5x84 42 0 Pa Vertical flue 8 meter 8 x 8 4 67 2 Pa Bends 90 x 2 2x 8 4 16 8 Pa T pieces x 4 4x84 33 6 Pa Roof terminal 8 4 8 4 Pa Total 168 0 Pa Total resistance of the system 116 Pa 168Pa 284 Pa Total resistance is 284 Pa higher than 250 Pa at which the Boiler output stays
8. S CB180 you only are allowed to set the gas valve on the right hand side DO NOT ADJUST THE LEFT HAND SIDE GAS VALVE For Gas Valve Adjustment see illustration on page 29 Figure 4 8 8 Gas conversion Converting from Nat gas to LPG Boilers with a single gas valve SCB 60 up to 120 kW See page 40 Boilers with a two gas valves SCB 150 up to 180 kW See page 41 NOTE Set LPG by CO emission Setting LPG CO is not important because it is influenced by the quality of the LPG which differs quite a lot mostly the measured CO is roughly between 9 5 and 10 High Fire CO is set to less than 100 ppm CO Low Fire CO is set to less than 10 ppm Page 31 of 51 9 LONG TERM SHUTDOWN It is recommended to leave the boiler turned on all year round to prevent frost damage in winter and moving parts seizing due to corrosion during other times of the year To switch the boiler off break the frost protected control circuit by others or turn the room thermostat down minimum power consumption is now assured the pump for the central heating and the fan will stop after a short delay If the boiler has to be put out of operation the following action must be taken e Close the gas cock e Remove the electrical plug from the wall socket or switch off the mains power s In the event of possible frost damage drain both the boiler and the system When draining the boiler drain the system first Then open the two drain cocks of the boile
9. and drain cocks at all low points please Quick Data Mains supply and connections Fuse Boiler circuit diagram Flue connections Flue calculations page 19 page 23 page 24 pages 10 and 11 pages 12 13 14 15 16 Boiler dimensions pages 10 and 11 Important provisions pages 8 11 and 19 Min pressure 1 Bat if less available please comact Technical Dept Max pressure 6 bar 3 TECNICAL DETAILS General Product Identification Number CE 0063 BP3254 Dimensions h x w x d Mm 835 x 458 x 485 890 x 458 x 670 Classification II2H3P Gas Appliance Type B23 C13X C23X C33X C43X C53X C63X C83X Boiler Type S CB 60 80 100 120 150 180 Water content etc Ltr 3 9 5 6 5 8 3 10 4 12 9 Weight empty Kg 46 73 78 83 92 101 Gas connection S R 34 R 34 R 34 R 34 R1 R 1 Co axial flue connections mm 80 125 80 125 100 150 100 150 100 150 100 150 Separate Flue Exhaust Air Inlet mm 80 80 80 80 100 100 100 100 130 130 130 130 Possible with Adaptor extra cost 100 100 130 130 Power consumption W 355 355 355 375 460 460 Protection class IP40 IP40 IP40 IP40 IP40 IP40 Central heating Nominal input Nett 80 60 C kW 14 56 18 74 23 92 27 111 34 138 43 166 Nominal input Gross 50 30 C kW 15 61 20 82 25 102 30 123 38 154 48 184 Gas flow max G20 m hr 5 9 7 9 9 8 11 8 14
10. are made via discreet plugs and sockets which are located within the boiler casing on top of the control panel Connections must only be made using appropriate diameter multi strand flexible cables Cable entry must only be via the rubber glanded cable points located at the bottom rear of the appliance the low voltage cables are at the left side top in the drawing below and the 230 VAC cables are at the right hand side of the boiler bottom in the drawing below If the boiler is to be room sealed then care must be taken to ensure the cable entries are reasonably air tight 7 2 Boiler Plug amp Connector Strip The stated items may be attached using the available plugs sockets use relays for pumps Interruption of the mains supply for on off control must not be used al NOT Boiler On off Cascade sensor Sensor or low voltage Bus Connection SEE DATA for Thermostat RC or E BUS L1 N L2 L N E Use for 3 way valve NOT USED Heating Pump Mains connection on DHW Use 22 27 28 230 AC 23 for D HW Interruption of the Primary Pump mains supply for on off control See below must not be used C Common Connector strip Strebel S CB HD Heat Demand Run LO Lock Out Heating curve When an outside temperature sensor has been connected the boiler will respond to the program of weather compensation but not when 0 to 10 volt control is used Through the parameter menu the heating curve see page 20 can be set to do this
11. directly on the flow to the installation after any low loss sensor header This flow sensor can work in conjunction with or without an outside temperature sensor and is required for 0 to 10 v control by others Page 20 of 51 5 6 Not used 7 8 Hot Water When a Calorifier is connected a hot water sensor or an on off thermostat can be Temperature connected If a sensor is connected the domestic hot water is set at 60 in the Boiler Sensor and also the water temperature will be shown on the display when active on DHW 9 10 Not used 11 12 10 10 VDC The boiler can be controlled by external control through a 0 to 10 V signal by which 0 Volt is no heat demand and 10 V is maximum output The DC supply has to be connected to terminal 11 while the has to be connected to terminal 12 A Flow Temperature sensor is also required available at extra cost from Strebel 13 14 Room These terminals have the following possibilities ue aes 1 When no on off control is connected the boiler temperature is controlled B S we by the maximum flow temperature set by the CH Control Knob on the we N Panel In this case a link has to be used between 13 and 14 When an timer for the E pee edn outside temperature sensor is connected the boiler is controlled through the l a heating curve which can be shifted with the CH Control knob on the Panel circui 2 When an On Off Control with or without a timer is connected
12. or when checking or replacing a new gas control valve Set the valve via measuring the CO percentage LPG is set by CO see page 40 amp 41 and gas consumption rate The flue may effect the Boiler output see pages 13 14 and 15 Use this method to set both the minimum and the maximum output first set the maximum output and then set the minimum output 8 7 1 Setting the maximum output Press with a ball pen or similar the SERVICE button 8 4 1 in the small hole beneath the plastic cap at the right side of the control fascia and then turn the CH knob to give the maximum fan speed See table 4 page 30 Measurement of the emissions and CO percentage is via the measuring point in the flue gas pipe after unscrewing the plastic cap If necessary turn the adjusting screw 2 see Figure 4 above for setting either anticlockwise to increase the CO percentage or clockwise to reduce the CO percentage see fig 4 page 30 For setting the minimum output CO3 percentage see page 31 8 7 2 LPG is set by CO see page 40 amp 41 Boiler S CB 60 S CB 80 S CB 100 S CB120 S CB 150 S CB 180 Minimum fan revolutions RPM 1800 1800 1800 1800 1800 1800 For setting CH Maximum fan revolutions RPM for 6500 6500 6500 6500 5500 5500 setting CH Table 3 Revolutions S CB luna cal IF the setting takes more than 30 minutes the Boiler will return to auto mode If so press the SERVICE button again Also for returning to t
13. shown blinking together with the code of the sensor blinking To see the temperature of the next sensor press again the RESET button FL temperature Flow temperature rE temperature Return temperature dH temperature Hot water temperature 0 temperature Outside temperature 8 5 Filling and venting the Boiler and the system in preparation for light up Fill the central heating boiler and the heating system using the appropriate filling method The correct fill pressure is gt 0 5 bar max 6 bar Pay attention to the following aspects in order to prevent corrosion of the CH system s Fill water if desired use X100 only additive to the water for the central heating The pH value should be higher than 5 if not we suggest you contact Strebel Test the water Use additive as required e Thoroughly flush out the central heating system removing all traces of flux and debris e Ensure that any plastic pipes that are being used are oxygen diffusion proof in accordance with DIN 4726 4729 If not separate the boiler circuit and the plastic pipes using a plate heat exchanger e Check the circuit for leaks to prevent oxygen from entering the system The boiler has an automatic air vent at the top of the boiler this must be opened when the boiler is put into operation Check that the A V screw cap is open by at least one twist Check all system air vents are open Shortly after putting the boiler into operation check the filling pressure and ad
14. the 13 and 14 connection c When using 0 10 Volt no outside sensor can be connected d When using 0 10 Volt a flow sensor is required on the Heating Flow P1 Inbuilt Boiler pump P2 Heating pump FS Flow sensor OS Outside sensor RT Room thermostat See a NOTE See Quotation for equipment supplied Page 23 of 51 7 6 Electrical circuit diagram 60 80 100 120 KW SINGLE GAS VALVE 150 180 KW DUAL GAS VALVE PCB with plug numbers S2 N PA Z S 7 Gasvalve Gasvalve 2 el Ground E m o T Es K e en 1 a 3 i o v S Rs J Transforme AER u Ma K TO YNDOS Ferrite Article no 7427113 o T ghg S 8 7 4 E 919 x SL Sh4 BL 3 512 Ks 6 16 cascade 2 x brad pil U x2 513 Tht x6 xX 7
15. the small throttle see page 29 screw 2 on the right hand gas valve clockwise about 4 half turns Press the service switch with a ball pen The appliance should start if there is no ignition open the throttle 2 anti clockwise about a half turn Turn the red control knob on the control panel to the maximum the speed of the fan will go to maximum the colour of the flame should be blue if yellow give a little less gas throttle clockwise or when the flame disappears anti clockwise When the flame has the right colour place the analyser in the measuring hole of the tube not before otherwise you could get too much CO in the analyser Set the screw 2 to obtain a reading of about 100 ppm CO CO is not important it will be around 9 5 Turn the red control knob on the control panel to the left to about 9 O clock Set the screw 2 to obtain about 50 ppm CO Turn the red wheel to the minimum Turn the red control knob on the control panel to maximum reset if required the CO at less than 100 ppm with help of the Throttle screw Setting after replacing the right hand gas valve 1 2 Open the throttle screw anti clockwise completely then turn the screw 8 half turns clock wise Press the service switch with a pen Commission the valves as per the commissioning instructions above starting at no 3 Conclusion Set the Boiler on CO emission Setting LPG CO is not important because it is influenced by
16. then turn screw 8 half turns clock wise 2 Press the service switch with a pen e The appliance should start if there is no ignition open the throttle anti clockwise about a half turn 3 Turn the red control knob on the control panel to the maximum the speed of the fan will go to maximum the colour of the flame should be blue if yellow give a little less gas throttle clockwise or when the flame disappears anti clockwise 4 When the flame has the right colour place the analyser in the measuring hole of the tube not before otherwise you could get too much CO in the analyser 5 Set the throttle screw 2 to obtain a reading of about 100 ppm CO CO is not important it will be around 9 5 Turn the red control knob on the control panel to the left about to 9 O Clock Set the screw 2 to obtain about 50 ppm CO Turn the red control knob on the control panel to the minimum Set the screw to obtain a CO value lower than 10 ppm 10 Turn the red control knob on the control panel to the maximum to check the max CO value reset if required the CO to less than 100 ppm with help of the Throttle screw E cae Baa Page 40 of 51 Boilers with a double gas valve SCB 150 and 180 kW Converting from Nat gas to LPG 1 10 Set the screw 1 to give a CO value less than 10 ppm 12 Disconnect electrically the left hand gas valve by separating the white plug and contra plug of the left hand gas valve Turn
17. use the parameter menu with the interface cable together with a laptop and the necessary software When the outside temperature sensor is connected the cable terminals 13 and 14 should be bridged or an On Off control should be used For RC and E BUS see separate data With the temperature button on the display CH this heating curve can be shifted with and 5 C The default for the heating curve of the main circuit is set to K factor 3 5 See graph page 20 Page 19 of 51 D iagram Outside temperature versus Flow temperature and the K factor Samy 240E EE PAT Flow Temperature Fo A L La aur nm 1 Outside Temperature SEE EEE E G R GR G 6 AI Plug Connection Description 1 2 Outside When an outside temperature sensor is connected the boiler will be weather Temperature compensated When no Roomstat or control is connected the terminals 13 and Sensor 14 should be bridged A remote room thermostat with or without time switch can be connected The RC or E Bus for RC and E Bus see separate data with or without built in room compensation can be used see other instructions When the outside temperature sensor is not connected the boiler is controlled by the roomstat or On Off control when connected to plug no 13 and 14 3 4 Flow In cascade the flow temperature sensor for the central heating circuit is connected to temperature these terminals and placed
18. 7 17 6 Efficiency at 80 60 C 97 98 98 98 98 98 Efficiency 50 30 C 109 109 5 109 5 109 5 109 5 109 5 Efficiency 40 30 C RAL 61 109 5 110 110 110 110 110 Nominal output at 80 60 C kW 55 73 90 109 136 163 Nominal output at 50 30 C kW 15 60 20 80 25 100 30 120 36 150 45 180 Norm efficiency 75 60 C RAL UZ61 107 107 107 107 107 107 NO x emission RAL 61 mg kWh lt 15 lt 15 lt 15 lt 15 lt 15 lt 15 CO emission RAL 61 mg kWh lt 20 lt 20 lt 20 lt 20 lt 20 lt 20 Data CO2 flue gas 9 Dew point combustion gas KE 53 Temp Flue gas ambient temp 20 C ue 85 Flue resistance capability Pa 250 up to 600 PH value condensate 4 to 5 5 Available pressure at 25 C mwk Dd 3 1 5 1 5 1 5 1 5 Max flow temp AC 90 Min Max Boiler Pressure bar 0 5 6 Sound level at Maximum Output dBA 46 0 47 0 48 0 49 0 150 0 50 0 Average Sound level dBA 32 0 33 0 33 0 34 0 35 0 35 0 Table 1 Data Boiler control includes Cascade control for up to 8 boilers requires flow temperature sensor at extra cost see item G page 8 Remote run amp fault indication 0 10 VDC control connection requires flow temperature sensor at extra cost Control for external calorifier primary pump pump not included via relay at extra cost see page 22 Weather compensation control with outside detector at extra cost Control for an external pump via relay at extra cost see page 22 external pump not inc
19. Quick Data Type S CB Flow amp Return Gas connection Mains supply and connections page 19 Fuse page 23 Boiler circuit diagram page 24 Flue connections pages 10 and 11 120 Kw 11 2 3 4 Flue calculations pages 12 13 14 15 16 Boiler dimensions pages 10 and 11 150 Kw T d n hs Important provisions pages 8 11 and 19 180Kw 2r A Min pressure 1 Bar if less available please contact Technical Dept IF IN DOUBT PLEASE ASK Max pressure 6 bar Page 5 of 51 2 2 Typical Cascade Layout Equipment shown may not be supplied Please see tender for the actual equipment supplied Flow Tem perature Sensor D FTS Strainer hems shown above DAS Dirt amp Air Seperator DP Dosing Pot if used CO Condense to Drain in plastic via a tundish SY Safety Valve LLH Low Loss Header FTS Flow Temperature Sensor See page 20 G Gas Connection Group Type S CB How amp Return Gas connection IF IN DOUBT PLEASE ASK Page 6 of 51 S Pressurisation unit with LNE on board high and low switches Expansion vessel heating System Notes SCB Boilers should always be fitted using a Low Loss Header it is also strongly reccommened to fit a Dirt and Air seperator along with a strainer on the return A temperature gauge on the flow is advisable to display the current flow temperature An automatic air vent is fitted to the boiler and we would recommend auto air vents at all high points
20. Strebel SC B Wall Hung Condensing Boiler INSTALLATION OPERATING amp MAINTENANCE INSTRUCTIONS Qualified for Energy Technology Authorised User No 00426 ffi STREBELS CB Version 3 1 Jul 06 Strebel is not liable for any damage caused by incorrectly following these instructions SAFETY GUIDELINES TYPICAL SYSTEM LAYOUT 2 1 Single Boiler layout amp quick Reference 22 Cascade Boiler layout amp quick reference TECHNICAL DATA S CB BOILERS INTRODUCTION 4 1 Operation of the S CB Boiler 4 2 Controls 4 3 Frost Protection 4 4 Cascade Control ACCESSORIES INSTALLATION OF THE S CB 6 1 Unpacking 6 2 Select the position of the boiler 6 2 1 Important provisions 6 3 Mounting the boiler 6 4 Air Supply amp flue gas discharge types 6 5 The air inlet and gas outlet system 6 5 1 SC B Flue resistance table and example calculation 1 6 5 2 Single amp cascade table air inlet resistance 6 5 3 Single amp cascade table flue resistance 6 6 Example flue resistance calculation 2 6 7 Example flue resistance calculation 3 6 8 Condense water drain 6 9 Central heating material 6 9 1 Central Heating circuit 6 9 2 The expansion vessel 6 9 3 S CB Internal Pump 6 10 Low loss header amp cascade layout INSTALLATION INSTRUCTION FOR THE ELECTRICIAN 7 1 Connecting to the mains power supply 7 2 Connector strip 7 3 Polarity sensitivity 7A Fuses Main amp boiler internal 7 5 Sample Cascade Electrical La
21. T FOR NATURAL GAS G20 On delivery immediately check that the Strebel S CB is complete and without any defects Report any damage immediately to the supplier or Strebel Ltd 1 After removing the carton the easiest way to take the boiler off the pallet is as follows 2 Lift the pallet including the boiler at the side of the flue outlet to a vertical position 3 The boiler has a polystyrene block which now supports the Boiler on the floor 4 Push the Boiler a little forward until the pallet is not touching the floor anymore 5 The boiler stands now on the flow and return pipes and the polystyrene block 6 Take away the pallet See also 6 3 The boiler can now be lifted unclip and remove the Boiler door before lifting easily for mounting by putting a hand at the lower side of the boiler Page 9 of 51 6 2 Select the position for the Boiler Select a position in the building with adequate access to the front side and the bottom of the boiler for future maintenance and servicing The boiler must have at least 20 mm space at each side Boiler Type _S CB 60 80 100 120 Co axial flue is standard supply on 60kw to 100kw Boilers Parallel flueing requires an adaptor at extra cost Parallel flueing is standard on the SCB 120 Co axial adaptor available at extra cost Co Axial ry connection atthe 7 7 T S parallel Rie Flue rear Separate exhaust and air inlet S 1 connections are Flue exhaust at LL the
22. X 90 bend 130 0 45 0 8 1 2 1 3 2 3 90 bend 150 X X 0 5 0 7 1 1 1 5 straight tube mt 125 80 8 5 11 5 X X X X straight tube mt 150 100 2A 4 5 5 8 0 15 20 5 45 Concentric bend 125 80 4 2 5 5 X X X X z 45 Concentric bend 150 100 I DID 2 5 4 8 10 LJ 90 Concentric bend 125 80 8 5 11 5 16 21 X 90 Concentric bend 150 100 2 5 4 5 5 8 15 20 Parallel Roof amp wall terminal air inlet exhaust resistance equals 1 meter straight length of same size Strebel S CB Example calculation Boiler type S CB 60 S CB 60 using a co axial flue system 125 80 with through the roof terminal For the stated output the boiler has 250 Pa fan pressure Roof terminal 25 Pa Resistance 25 Pa subtracted from 250 Pa leaves 225 Pa Each metre length of 125 80 flue has a resistance of 8 5 Pa 225 divided by 8 5 26 4 Therefore the above example allows a straight flue run of 26 4 metres Reduce this flue run by 1 metre for each 90 degree bend or LS metre for each 45 degree bend See also sample parallel flue calculation on page 16 Install horizontal Flue parts under 1 fall in the direction of the boiler one centimetre for every linear metre Page 13 of 51 6 5 2 Single amp Cascade resistance tables of air inlet and flue The output of the boiler is affected by the resistance of the air inlet and flue system as a result of controlled gas air ratios in the Boiler At a resistance up to 250 Pa the output will be as indicated on the Boiler d
23. able 43 Sensor defect 44 Flue gas circulation from behind the heat exchanger 45 Flow or DHW leakage Page 34 of 51 Causes of faults table cont d 46 Setting of the RPM switch of the pump is too low 47 Sensors changed around return sensor S2 and hot water sensor S5 48 Fuse F1 Automatic re set 49 Fuse F2 Automatic re set 50 Line voltage 230 VAC pill Parameter s in the installer program entered incorrectly 52 Open control room thermostat or common thermostat connected to an incorrect connector strip ort 53 Pale width program in the installer menu incorrectly programmed or steps are too long 54 Clock program of the clock thermostat should start earlier in the morning 55 Flow and return on the boiler have been changed around 56 Cable or plug to the three way valve connected incorrectly Bil Priority sensor S3 not placed correctly or defect 60 Cable harness connectors incorrectly mounted on the PCB 61 Gas safety valve defect 62 After programming using the computer confirms the new settings 63 Incorrect parameters or values outside the range of the program have been entered 64 The burner control is frequently checking the supply voltage 65 Mechanical defect in the Reset key when H is blinking when the H is not blinking the burner control is defective 66 Gas valve is not correctly adjusted at maximum input
24. antle the burner unit remove the 6 x M6 nuts and the ignition cable and move the burner unit forward Remove the plug of the fan cable to the fan when the burner has been pulled half way from the combustion chamber Check the inside of the heat exchanger Dismantle the air gas mixing box on the suction side of the fan and check the fan blades Check the distance from the electrode to the burner there should be 4 to 5 mm gap Burner 4 5mm Figure 3 Distance from electrode to burner S CB Page 38 of 51 12 3 Maintenance Depending on the outcome of the inspection preventative maintenance should be considered Reasons may be ref a Comments and notes from the customer should be taken seriously and an effort should be made to find the cause of any deficiencies and problems ref b The pressure of the system should be set between 1 and 6 bar find possible leaks in the system and have these fixed ref c Any leakage must be repaired ref d Flue Find the cause of any water leakage from the air supply possible cause from the roof surface Check the concentric flue and trace any leaks in the flue gas discharge and rectify ref e Rinse if the condensed water from the siphon is badly contaminated Several options are available 1 If the burner has already been removed using a filling hose pour water into the heat exchanger it will eventually reach the siphon 2 Adjust the drain line up if possible allowing the wa
25. arranty 6 9 Central Heating If plastic material for the flow and return from the radiators or under floor heating is being used and not oxygen diffusion proof to DIN standard 4726 4729 a separation between the central heating water of the boiler and the system will be required e g using a plate heat exchanger This will prevent contamination of the boiler heat exchanger with magnetite If the plastic material is not to the DIN standard failure to provide such separation will void the warranty of any boiler parts relating to water 6 9 1 Central Heating circuit The S CB has no pressure relief safety valve This should be fitted in the flow of the system in close proximity to the boiler Boiler side of any valves See pages 5 amp 6 The S CB has no internal bypass Low loss headers must be used to allow flow even when all system valves are closed Tip To prevent contamination of the S CB heat exchanger it is recommended to thoroughly flush the system with clean running water prior to first use 6 9 2 The expansion vessel Please remember that the capacity of an expansion vessel is chosen or installed to match the capacity of the central heating system and the static pressure Fit the expansion vessel in the return of the central heating system see page 5 amp 6 2 1 and 2 2 Expansion vessels and fill units available at extra cost from Strebel Page 17 of 51 6 9 3 Internal Pump The pump has a speed regulator adjusted to the
26. ata plate Higher resistance of up to 600 Pa max can be overcome with reduced Boiler output see page 12 An under pressure in the flue gas outlet is not required a positive pressure is created by the fan of the Boiler which is specially designed for this purpose As a result of this the diameter of the common air inlet and flue gas outlet is minimised while the built in non return air valve prevents recirculation between the Boilers when 2 or more are used on a common flue Table Resistance of the air inlet system The stated Air inlet diameter is that used between the boilers and the roof or wall terminal Transmission 80 mm 100 mm 130 mm 150 mm 180 mm 200 mm 250 mm kW Pa m Pa m Pa m Pa m Pa m Pa m Pa m 60 4 1 0 35 90 7 2 0 6 120 10 4 1 0 4 150 15 6 1 5 0 6 180 24 9 2 1 0 5 210 12 2 5 14 0 6 240 15 3 1 8 0 7 270 18 4 2 2 0 8 300 21 5 2 6 0 9 330 25 7 3 1 1 0 8 360 8 3 4 1 3 0 9 390 9 3 8 1 5 1 420 10 5 5 3 17 1 2 450 12 5 8 2 13 480 13 6 3 2 3 14 510 14 6 5 2 6 1 5 540 15 7 2 9 1 8 570 16 8 3 3 2 1 600 18 9 3 6 23 0 65 630 20 10 3 9 2 4 0 7 660 22 11 4 2 2 5 0 75 690 23 12 4 6 2 6 0 8 720 25 13 5 3 0 85 750 27 14 5 4 3 5 0 90 780 28 15 5 8 4 0 95 810 30 16 6 2 4 2 1 840 17 6 6 43 1 1 870 18 7 0 4 3 1 2 900 20 75 4 5 13 930 21 8 47 1 4 960 22 8 5 49 1 6 990 23 9 0 52 1 8 1020 25 9 5 5 5 2
27. d more water to maintain the required pressure if necessary Cure any leaks on the heating and dhw system Page 28 of 51 8 6 Commissioning 8 6 1 General Measure the gas pressure in the gas pipe at the pressure nipple 3 of the gas safety valve The gas pressure needed for the boiler to work properly under full output is a minimum of 15 mbar or current regulations if greater all plant running S CB 60 80 S CB 100 120 S CB 150 180 Figure 4 Gas valve s Strebel S CB NOTE THE SCREW 2 ON THE GAS VALVE BLOCK SCB 60 80 150 180 IS THE SMALL SCREW AS SHOWN 8 6 2 Boiler Commissioning Light Up e Once the system has been filled vented see 8 5 page 28 tested and everything is in order according to this manual connect the central heating boiler to the mains and turn the boiler on e Make any external control device IE room stat control panel etc e When the boiler is turned on the display will show the requested water temperature see 8 4 8 4 1 e The burner control will repeatedly give an electronic spark until a flame appears If no flame appears after several attempts check 1 the gas supply 2 the gas valve has been set correctly e The Boiler has a built in hot water control the boiler will first heat up the calorifier when connected e Once the calorifier is hot if fitted adjust the room thermostat or make an external control to a higher value to start the burner for CH 8 7 Adjusting and setting the output
28. defect there is no spare fuse present see diagram on page 26 50 Check the mains lead the wall box for voltage main fuse 51 Check the programmed parameters 52 Check the type of room thermostat and the indication on the sticker of the connector strips on the boiler 53 Change the pulse width program see parameter manual 54 Change the wake up times of the clock thermostat 55 __ Flow is on the left hand side of the boiler return on the right hand side 56 Check three way valve including cables on the valve as well as on the connection strip 57 Check the sensor on the calorifier 60 It may occur that the 18 pin PCB plug moved up one pin too far this may cause a fault in the communication between the wiring and the pins check both the left and the right hand side of the PCB plug to make sure the plugs are placed correctly 61 A defect to the gas block usually has one of two causes the electric coils are defective or an internal defect on the gas valve In either case it would be recommended to replace the entire gas valve 63 Use the correct software please check for programming Also do not exceed the value limits Try to reprogram 64 Check the supply voltage using a universal meter if the voltage is correct should be between 190 and 250 Volt replace the burner control 65 In order to restore the Reset key take the display from the plastic spacers and try the proper working again I
29. e socket possibly adjust before the plug slides in 2E Check that the plug s are fitting tightly 22 Open the drain line left hand side of the boiler by unscrewing the cap Keep a jug on hand to catch the amount of water drained Poke through the line using a pen moving left upward and right upward Take the burner unit from the boiler as required and pour some water in the heat exchanger to rinse out the siphon 23 Bleed the unit not only the boiler itself but the entire system in the event of such overall de aeration it is recommended to remove the 230 V off the boiler from the wall switch as the CH pump should not be activated during the process 24 Check the cut off valve of the three way valve Take the pump motor out by unscrewing the four fastening screws Check the valve on the inside of the housing The driving motor can be removed by taking out the fastening screw at the front of the housing right bottom and subsequently pressing the snap in lug on the side of the housing just above the motor while pressing the motor down at the same time E Check the air inlet and flue lines for blockage 26 Check the inlet and flue system 27 See 26 28 29 REPLACE THE BOILER 30 Replace the high limit thermostat by unscrewing from the brass nut no draining is needed do not remove the brass nut 31 Go over the settings as outlined in paragraph 6 6 1 Page 36 of 51 Troubleshooting table cont d
30. ection only Always ensure the casing is placed over the boiler when the boiler is in operation The kW available pressure for the inlet and flue system is 250 Pa unless data from the table is being used 180 N B Install the horizontal flue parts under 1 fall in the direction of the boiler one centimetre for every linear metre Failing to do so may result in water condensation building up in the flue gas tube In turn this may cause failure 160 140 The impact of the flue to the output 120 The table on the left shows the relationship between the Boiler output and the resistance of the air inlet and flue Up to a resistance of around 250 Pa the output will be approximately the same as the Boiler data plate In the event of a greater resistance up to maximum 600 Pa this will change the Boiler output The resistance and the change of output only affect the maximum output and not the minimum 100 Tip Remember that possible output changes may influence hot water production and 40 100 200 300 400 500 600 0 transmission absorption calculations Pa Resistance Decrease of input up to 250 Pa 0 300 Pa 3 350 Pa 4 400 Pa 6 450 Pa 7 500 Pa 8 550 Pa 9 600 Pa 10 Page 12 of 51 6 5 1 Strebel S CB Fl
31. ent and have the values shown below Temperature Resistance Sensor 1 2 3 Temperature Resistance Sensor 6 C 4 5 7 Ohm C Ohm 0 32550 30 171800 5 25340 25 129800 10 19870 20 98930 15 15700 15 76020 20 12490 10 58880 25 10000 5 45950 30 8059 U 36130 35 6535 5 28600 40 5330 10 22800 45 4372 15 18300 50 3605 20 14770 55 2989 25 12000 60 2490 30 9804 65 2084 35 8054 70 1753 40 6652 75 1481 45 5522 80 1256 85 1070 90 915 95 786 Table 2 Sensor table S CB If the CH water temperature rises very sharply the boiler will be blocked by combined action of the supply and return sensors until the water temperature has fallen again Page 26 of 51 8 3 Run and fault Information and Display Meanings Display Two kinds of information may be displayed a Display codes Steady and not Flashing on and off When a code is displayed it means that there is a heat demand except the code 0 but the boiler is not working example because the temperature is higher than the set temperature After cooling down in most cases the appliance will automatically start to function again Codes not flashing on and off A2 to O are not faults Status Code on display Action Flow temperature achieved A2 Wait until temperature Flow temperature achieved A3 decreases DHW Calling Boiler off on Temperature A4 Check cylind
32. er control Anti constant recycle hunting on amp off A5 Wait for cooling down Speed of the fan is too high A6 Wait until the speed is OK Speed of the fan is too low A7 No call for Heat external control O Switch the external control to contacts are open amp not calling for heat call for heat High limit thermostat is in a short term C3 The condition may clear on 10 Sec limit condition cooling down else F2 condition Not used C5 Wait for cooling down b Codes flashing on and off A code which is flashing on and off will show that the boiler is in a lock out position and will not restart automatically The RESET button needs to be pressed until the flashing lock out code disappears Without any adjustments or repairs to the appliance it is likely that the same lock out will happen again so please look at pages 33 to 39 of this booklet on how to prevent this particular lock out Faults with codes flashing indication Status Code on Action Read page 37 display amp information below Short circuit on ionisation probe FO Check Probe etc Press Reset Button High limit thermostat condition F2 Press Reset Button Fan speed not correct F4 Press Reset Button No flame after 5 attempts F5 Press Reset Button Flame lift off during heat demand F6 Press Reset Button Flow temperature too high EO Press Reset Button DHW temperature too high El Press Reset Button Return tempe
33. ew Gasket inlet pipe amp fan AGO Gasket inlet pi of inlet pi ae B04 016 132 E04 016 132 23 Air gas mixing plate A60 A80 23 Air gas mixing plate A100 A120 24 Pipe coupling 34 x 34 ooo 27 Siphon 90mm grey 27a Siphon cleaning tube grey 28 Flexible tube 600 mm grey 29 Onoff switchblack 30 Display unit DU 910 incl cable E04 016 278 Page 44 of 51 14 2 Burner fan gas pipe heat exchanger casing S CB 150 S CB 180 Bee TAEA Figure 5 S CB150 S CB 180 Page 45 of 51 14 2 1 Burner fan gas pipe heat exchanger casing Spare S CB 150 S CB 180 Spare parts S CB150 180 Duo Z GB eee eee Front panel Seal ring 130 07 004 025 Air inlet connection 130 01 008 004 G S E07 004 E01 008 asket air inlet connection 162 135 fe Ss el Automatic air vent E04 015 008 E07 010 50 EN A EA 54 50 51 52 2a 53 54 55 56 55 Insulation burner chamber BOIS _ 56 Heatexchanger1246 O 56 Beat exchanger 1548 O 57 Nut M8 DIN934 RYS 60 Burner door E08010 013 65 o5xl4mmTorxscrew 66 Air gas inlet pipe 12 6 1548 E03 010 016 67 _ M8x8 DIN912 screw ie te a 68 Gasket air gas inlet pipe amp fan A150 68 Gasketair gasinletpipe amp fanAl80 o poo Faa 4 016 290 E07 002 029 71 Air gasmixin
34. f negative replace the display If the display works outside the boiler check that the key has sufficient space under the plastic cover not being blocked make room If the letter H is not blinking replace the burner control 66 Re adjust the gas valve as per the instructions Page 37 of 51 12 INSPECTION AND MAINTENANCE 12 1 General The boiler requires inspection at least once every 12 months As a rule of thumb inspection maintenance is to be carried out when the boiler generates a number of similar error codes 12 2 Inspection Items J K L Major Service An inspection should cover at least the following matters a b C Ask the user about any problems with the CH boiler and or any comments Check the system water pressure Remove the casing of the boiler and check all lines and connections for traces of water and water leakage Inspect the top of the casing and or the top of the boiler for water leakage or traces of water from the air supply pipe or the de aerator Open the condense siphon and remove any dirt If a laptop computer is available connect this computer and check the service page for error messages starts and failed successful starting attempts Fire the boiler on maximum output and measure the output and the CO2 percentage CO on LPG Fire the boiler on minimum output and measure the output and the CO2 percentage CO on LPG Note the noise of the CH pump and the fan Dism
35. gbox Siphon 90 mm grey a 74a Siphon cleaning tube grey 75 Flexible tube600mmgrey 78 Tube glandsiphon 79 Tube gland 38 mm 80 Adapter flue gas outlet 100 130 E01 008 009 80a Gasket flue gas outlet 194 150 Page 46 of 51 MY AAN 90 14 3 1 Pipes pump Spare S CB 60 S CB 120 Spare parts S CB60 120 Duo Z GB page 3 90 Check valve 14 x14 E04 015 005 91 Pump complete E04 016 298 1 umphouse 130 mm E04 015 064 E04 016 310 Drain 3 8 E04 008 002 Page 48 of 51 14 4 Pipes pump S CB 150 180 Figure 6 S CB 150 S CB 180 Page 49 of 51 14 4 1 Pipes pump Spare S CB 150 S CB 180 Spare parts S Cb150 180 Duo Z GB a 100 Pump complete E04 016 288 E04 016 311 Accessories Item Part no 1 Outside air temperature sensor 12kOhm 25 C E04 016 306 External Flow temperature sensor after low velocity header E04 016 304 10kOhm 285 C to be wired to the boiler 3 amp 4 3 Calorifier temperature sensor 10kOhm 25 C to be connected to the E04 016 303 boiler 7 amp 8 4 Conversion set from concentric to parallel flue and air terminal for E61 001 158 SCB 60 amp 80 5 Conversion set from concentric to parallel flue air terminal for E61 001 159 SCB80 amp 100 amp 120 7 Conversion set from concentric to parallel flue air terminal for E61 001 161 SCB120 amp 150 amp 180
36. he normal menu press SERVICE Set the Boiler via measuring the CO percentage as shown in the table 4a below and gas consumption rate Comment Measurement of the emissions and CO percentage is via the measuring point in the flue gas pipe after unscrewing the plastic cap For gas valve adjustments see illustration on Page 29 Fig 4 5 Gas consumption Boiler S CB 60 S CB 80 S CB 100 S CB 120 S CB 150 S CB 180 Natural 0 098 m 0 130m 0 164 m3 0 196 m3 0 245 m3 10 293 m gas G20 per minute per minute per per minute per minute per minute minute LPG See 40 amp 41 See 40 amp 41 See40 amp 41 See 40 amp 41 See 40 amp 41 See 40 amp 41 Table 4 Maximum settings Type of gas Natural gas G 20 LPG Injector none none Gross MJ m3 50 7 76 64 Cal value Net MJ m3 34 88 00 CO max Output 8 8 0 3 See LPG CO min Output 8 5 0 3 See LPG measured without casing Table 4a Co2 settings Page 30 of 51 8 7 2 Setting the minimum output Set the minimum load once the maximum load has been set In service mode turn the CH knob until the minimum RPM setting has been reached 20 on the display In order to set or adjust the minimum load twist the screw 1 for the minimum setting Turn the screw clockwise to increase or anti clockwise to decrease the CO percentage see table 4 a page 30 The gas valve on the S CB150 and
37. highest setting Do not change this setting The S CB has a built in pump control with a standard 3 minute over run The pump will work at top speed when heat is required When heat is no longer required the pump will continue to run for another 3 minutes The pump and connected three way valve for the calorifier or external pump if fitted are also activated for one minute every 24 hours The 24 hour cycle starts as soon as the power supply to the boiler is activated 6 10 Low loss header Low Loss Headers must be used with the S CB Boiler Typical Cascade Layout Hidden Detail Air amp Dirt seperator A Low Loss Header D1 Diameter of common flow amp return headers For Low Loss Header size Flow and Return size see table Low Loss Header amp Common Flow Return OUTPUT D4 D1 Boiler Connections Group I KW tea ach a Flow Return Gas connection 60 1 1 2 3 4 3 80 1 1 2 3 4 3 100 1 1 2 3 4 4 120 1 1 2 3 4 4 4 Boiler Connections Group IT Type Flow Return Gas connection 5 S CB 5 150 7 ig 6 180 De 1 8 10 10 10 10 Note to Design Engineer See Quotation for equipment supplied Page 18 of 51 7 INSTALLATION INSTRUCTIONS FOR THE ELECTRICIAN 7 1 Connecting to the mains power supply The console has an ON OFF button to switch the Boiler on or off The electrical connections to the S CB
38. is reached by among other things using a special heat exchanger made of stainless steel The heat exchanger allows flue gases to cool down below condensation point condensing the flue gases and releasing extra heat This has an immediate positive impact on the efficiency exceeding 100 net calorific e S CB flue gases have a low temperature below 85 C the boiler needs to have a high efficiency approved stainless steel or plastic flue system Aluminium flue systems are not allowed to be connected to these boilers Adequate drain points must be added to the flue system with a u trap 4 2 Controls The Strebel S CB Boiler adjusts to the demand for heat by using flame modulation and external controls That is on the basis of 1 0 to 10 volt control 2 Strebel optimiser control 3 Built in weather compensation with an outside detector 4 RC or E BUS For RC or E Bus system see separate booklet The boiler control is equipped with Control for a DHW Cylinder with a diverter valve or a pump pump via a relay both not supplied Connection for a Heating pump via a relay pump and relay not supplied Connection for a room thermostat on off control optimiser or 0 to 10 volt control see 4 4 1 4 3 Frost protection Frost protection does not protect the system or system pumps It protects the boiler Frost protect the system by fitting devices to link out any time controls In a frost condition at 7 Boiler temperature the Boiler internal pum
39. lied with the S CB boiler Page 39 of 51 Boilers with a single gas valve SCB 60 up to 120 kW Converting from Nat gas to LPG 1 Turn the small throttle see page 29 screw 2 clockwise about nr 4 half turns 2 press the service switch with a pen 3 The appliance should start when there is no ignition open the throttle 2 anti clockwise with about another half turn 4 Turn the red control knob on the control panel to the maximum the speed of the fan will go to maximum the colour of the flame should be blue if yellow give a little less gas throttle clockwise or when the flame disappears anti clockwise 5 When the flame has the right colour place the analyser in the measuring hole of the tube not before otherwise you could get too much CO in the analyser 6 Set the throttle screw 2to obtain a reading of about 100 ppm CO Note CO is not important it will be around 9 5 7 Turn the red control knob on the control panel to the left to about 9 O Clock 8 Set the screw 2 to obtain about 50 ppm CO 9 Turn the red control knob on the control panel to the minimum 10 Set the screw 1 so the analyser shows a CO value lower than 10ppm 11 Turn the red control knob on the control panel to the maximum to check the max CO value reset if required the CO to less than 100 ppm with help of the Throttle screw When fitting a new gas valve 1 Open the throttle see page 29 screw 2 anti clockwise completely
40. luded Electronic Ignition Boiler output modulated between 25 and 100 Page 7 of 51 4 INTRODUCTION Warning For trouble free operation of the boiler and to be assured of the full guarantee the following items are required A An automatic air and dirt separator must be installed in the installation and a strainer in the return also devices as shown on pages 5 or 6 Minimum static water pressure should be more than 0 5 bar The system is flushed water tested and additive utilised if required Boiler auto air vent cap must be open and all system air vents open A SOF Low and high water cut out pressure switches usually in the fill unit connected in the Boiler volt free control circuit in series with other controls on terminals 13 14 or by 0 volt when using external 0 to 10 volt control by others F Control of Boiler on off must never be by interruption of the mains supply G When using a common flue the inbuilt cascade control must be used These instructions are written for the installer of Strebel products and contain all necessary information on the installation and adjustment of S CB boilers We suggest that you read the instructions before installation to ensure that all work is done correctly We suggest that you keep these instructions near the boiler 4 1 Operation of the S CB Boiler The heating boilers from the Strebel S CB series are central heating boilers with maximum high efficiency Such performance
41. n external pressure gauge Ws Fan not connected unplugged 8 Fan has been damaged or dirty 9 Fan is defective 10 Gas valve not open 11 Gas pressure is too low 2 Gas pipe diameter is too small 13 Fuse F3 defect 14 Fuse F4 defect 15 Fuse F5 defect 16 Gas valve setting for lowest RPM incorrect 17 Gas valve is not or incorrectly connected to the power supply 18 Ignition cable incorrectly connected 19 Transformer defect 20 Connecting plug to gas valve connected incorrectly or moist inside Zl Power plug of the pump connected incorrectly 22 Siphon blocked 23 Opening and closing manual de aerator after bleeding 24 Three way valve has been damaged 25 Too much resistance in the flue system or flue system is restricted or blocked 26 Flue system having a leak to the inlet system re circulation of flue gas only in case of concentric flue connection O78 28 29 Heat exchanger blocked insufficient circulation 30 High limit thermostat defect insufficient circulation Sl Maximum load is too high 34 Burner control defect 35 Ignition electrode defect porcelain cracked incorrect distance to burner control 36 Moist or wet on the gas valve cables 37 Moist or wet on the PCB of the burner control 38 Moist or wet in the pump wiring 39 Moist or wet in the fan and or the fan connection 40 Fan plug connected incorrectly 41 Plug connected incorrectly 42 Damaged connecting c
42. ndness testing IM 11 IM 16 Installation of gas pipe work and boosters HSE guidance note PM 5 automatically controlled steam and hot water boilers CIBSE IHVE Guide ports A B and C IGE UP 1 IGE UP 2 and IGE UP 7 Failure to comply with these regulations could lead to prosecution and deem the warranty invalid This appliance must be installed in accordance with the rules in force and used only in a sufficiently ventilated space when not in a room sealed application or compartment ventilation as current regulations Page 4 of 51 2 TYPICAL SYSTEM LAYOUTS 2 1 Single Boiler Layout Please note everything below the dotted lines is an optional extra or supplied by others Heating Flow and Return interlock with boiler Pressurisation Unk with high and low pressure switches on board Heating expansion vessel hems shown above System Notes DAS Dirt and Air seperator SCB Boilets should always be fitted using a Low Loss P1 Heating Pumps Header it is also strongly reccommened to fit a Dirt SV Saftey valve 34 x 3 bar normal and Air seperator along with a strainer onthe return CO Condense to drain in plastic A temperature gauge on the flow is advisable to display via a tundish the current flow temperature An automatic air vent is AAV Automatic air vents fitted to the boiler and we would recommend auto air DOC Drain off cocks vents at all high points and drain cocks at all low points please Group
43. nsitivity The S CB boilers are not phase polarity sensitive 7 4 Fuses Main supply fuse should be 5 Amp slow blow Not Strebel supply On the PCB Board there are 3 auto fuses and 1 mains fuse Fuse nr Use Value Fl Ignition Automatic re set F2 Electronics Automatic re set F3 Electronics Automatic re set 230 VAC Mains 3 15 Amp Maximum electrical load for the boiler a For the boiler types S CB60 to S CB120 The total load connected for external diverter valves and or pumps should not exceed a maximum of 345 Watt 1 45A Any external pump should be connected to the boiler via a relay When the total of the connected pumps and valves exceeds 345 Watt these items must be controlled through relays b Boiler types S CB150 S CB180 The total load connected for external diverter valves and or pumps should not exceed a maximum of 255 Watt 1 1A Any external pump should be connected to the boiler via a relay When the total of the connected pumps and valves exceeds 255 Watt these items must be controlled through relays 7 5 Sample Cascade Electrical Layout All items are not used on every installation North Wall see notes below See Drawings in the installation operating and maintenance instructions pages 6 and 20 for full cascade hydraulic layout detail Notes a When using 0 10 Volt no room thermostat can be connected b When using 0 10 Volt no bridge is needed for
44. p starts When the boiler water temperature falls down to 3 C the burner is also ignited This operation will cease as soon as the boiler temperature has reached 10 C 4 4 Cascade control Using the integrated cascade control a maximum of 8 boilers can be controlled in a cascade configuration The Cascade has in built full logic step control The Boiler will require a Flow temperature sensor and 2 wires to each boiler in a daisy chain When using a common flue the cascade control must be used 4 4 1 0 10 VDC connection available The boiler is equipped to take a 0 10 VDC signal from a controller by others set at time of commissioning with which up to 8 boilers can be controlled in cascade utilising the built in cascade manager 0 Volt is no heat demand The Boiler will require a Flow temperature sensor at extra cost Page 8 of 51 5 ACCESSORIES Dependent on the choice of control and hydraulics etc accessories are available from Strebel at extra cost See Page 50 for details 6 INSTALLATION OF THE STREBEL S CB 6 1 Unpacking The Strebel S CB includes the following documents and accessories 1 Installation and cascade instructions for the installer User instruction incorporated 1 suspension bracket Fuses and 3 nuts for mounting the burner plate attached to the front of the gas valve 1 siphon with tightening nut and gasket Reducing couplings where required for flue gas discharge and air supply THE BOILER IS SE
45. r e Put the O I switch to position O and the On OFF switch in position OFF e Isolate at local isolation e Open the filling and drain valve of the central heating system and the boiler drain valve on the right and left hand side of the boiler Page 32 of 51 10 LOCK OUT As the burner control goes into Lock Out the display will show a code see also 8 3 page 27 which corresponds with the cause of the error the table below shows the errors Only by pressing the Reset button the boiler can be reactivated Meaning Code on Possible cause of the Lock Out Display See fault numbers Page 34 to 37 Short Circuit in Ionisation Circuit FO 18 35 61 Limit Temperature F2 4 5 21 23 24 29 30 42 46 Wrong Fan speed F4 7 8 9 13 19 39 40 41 No Flame after 5 Ignition attempts F5 10 11 16 18 22 25 35 Flame lost 4 times during running F6 10 12 16 22 25 26 32 44 Flow sensor shorted or interrupted E0 4 5 23 29 46 El 3 4 21 24 25 38 43 55 Return Sensor short interrupted E2 4 5 23 29 46 E4 3 4 21 24 25 38 43 55 E5 1 2 3 4 21 24 30 43 46 51 55 63 New Parameters programmed correct PP Press Re Set Button Parameters incorrectly programmeerd PE Revise programme Burner Control has malfunction nc Switch power off then on No communication in cascade mode __ nc Check cables to all boilers and Bus address numbers Burner defect H1 Press reset button There are several fault
46. rature too high E2 Press Reset Button Boiler not operational Fl Program Fault Not used E5 Press Reset Button New Parameter programmed correctly PP Press Reset Button Parameter incorrectly programmed PE Program again Burner control out of order nc Switch the mains off wait 5 seconds then on Page 27 of 51 8 4 Display console buttons There are a couple of uses of the buttons and knobs on the display console namely to adjust settings or to get information means the OFF B 0 on the display means No heat Demand R On Heat Demand the required boiler temperature is shown on the Display or domestic water temperature during DHW demand DHW if fitted 8 4 1 Service Button B SERVICE press button In order to set the gas valve for the maximum output as well as for the minimum output the appliance has to be put into the SERVICE mode press a ball pen or similar into the small hole beneath the plastic cap at the right side of the control fascia see 8 1 page 25 By turning the CH knob the speed of the fan can be set between the maximum and minimum speed The display will show the speed of the fan e g 25 means 2500 r min After 10 min the boiler switches back to the automatic program If the setting of the gas valve is not complete press the switch again R The temperature of all the connected sensors can be shown without the help of a laptop on the display Press the RESET button the first temperature is now
47. re the Boiler for mounting as in 6 1 Determine the positions for the flow and return pipes using the suspension bracket or a suspension frame if any When marking the holes ensure that the suspension bracket or frame is level Drill the holes for the flow and return pipes if required then hook the heating boiler onto the bracket or place it upon the frame 6 4 Air supply amp flue types When using multiple SCB Boilers on a common flue the inbuilt cascade control must be used SCB Boilers 60kw to 100kw use a co axial flue Twin pipe flue ing utilises an adaptor at extra cost Boilers 120 150 and 180 kw use parallel i e one air inlet tube and one exhaust tube a co axial adaptor is available at extra cost All Boilers can be used in a room sealed application or if the boiler room or fitting space complies with the relevant ventilation requirements Boilers can be non room sealed I E exhaust only Providing ventilation as per current regulations is in place See pages 10 and 11 for flue connections Install the horizontal flue parts under 1 fall in the direction of the boiler one centimetre for every linear metre Adequate drain points should be installed throughout long horizontal exhaust runs and at the base of any vertical flue exhaust run 60 mm minimum u traps should be utilized 6 5 The air inlet and flue gas outlet system The Boiler is normally room sealed the casing is airtight with air entering through the air supply conn
48. rear and air inlet at the front Concentric Flue D 80 125 mm 100 150 mm 100 150 mm Page 10 of 51 Boiler Type S CB 150 and S CB 180 150kw and 180kw Boilers are supplied with parallel flue connections an adaptor is available for co axial flue ing at extra cost Air inlet Flue D1 D U 890 Parallel Flue Co Axial Flue D S CB D D1 150 130 130 100 150 180 130 130 130 150 6 2 1The installation area must have the following provisions e Items listed in 4 page 8 also see drawings 2 1 page 5 and 2 2 page 6 e Flectrical point with earth connection e Connection to the drains for condensation water or suitable condense removal device e A sound wall or suitable mounting The wall or frame used for mounting the boiler must be able to hold the weight of the boiler e Both the air supply if room sealed and the flues are to be connected to the outside wall and or the roof see safety guidelines page 4 e Install horizontal Flue parts under 1 fall in the direction of the boiler one centimetre for every linear metre complete with extra drain points with a 60mm water trap s The installation area must be dry and frost free and conform to relevant regulations e Installers are advised to choose a part of their building where slight noise emission will not cause disturbance e A minimum of 15 mbar gas pressure and or current regulations all plant running Page 11 of 51 6 3 Mounting the Boiler Prepa
49. s or complaints that the display is unable to convey Some of these faults or complaints are Complaint Cause of the fault see page 34 to 37 a The building is not warming up but the boiler is working 45353554 b Noisy ignition 16 35 c Burner of the boiler is continuously on but the CH water is not warming 45 up d Room thermostat demanding heat but boiler is not firing 1 42 52 e Burner of the boiler is continuously on building is getting too hot 2 f Boiler is very noisy during CH operation 29 46 66 g Tops of radiators are insufficiently hot 55 h ON DHW the water is cold 24 56 i Temperature of the DHW is far too hot 51357 j ON DHW the water remains below 60 C 51 58 k ON DHW the boiler is very noisy 23 59 L Fault after replacement of the burner control 60 Table 5 Other faults Page 33 of 51 11 TROUBLESHOOTING 11 1 Cause of the fault The faults listed on page 33 may have the following causes Table 6 Causes of faults l Room thermostat incorrectly connected Ds Room thermostat not turning off short circuit in cable 3 Sensor causing short circuit in cable or internally 4 Pump not running got seized Sl Water pressure in the CH system too low on external pressure gauge 6 Water pressure in the CH system too high o
50. ter to flow to the drain of the boiler ref f Act upon the findings from the service screen using the service program or a laptop computer if used and change any parts that may be the cause of these faults ref g See under h ref h Adjust the gas setting at the gas safety valve as necessary under minimum output ref i If the CH pump has become noisy certainly when the pump has been working for more than five years it is recommended to replace the pump motor as a precaution ref j Never clean the burner itself it is not required If dirt has built up on the inside of the heat exchanger and or scale has formed on the inside of the stainless steel pipes it should be removed using a hard brush and citric acid do not use a steel brush Always vacuum any dirt away ref k If deposits have built up on the fan blades carefully clean the blades one by one until the blades are clean again Work consistently in cleaning the blades or else the fan may run irregularly and get out of balance ref 1 Carefully bend the electrode until the gap is correct 4 to 5 mm or replace see page 44 13 INSTRUCTING THE USER Show the user how to operate the entire system Above all the user should be made familiar with all safety precautions The user should be told that service and maintenance of the central heating boiler is required every 12 months or more Regular service is essential for the safe operation of the boiler Hand the user the documents supp
51. the quality of the LPG which differs quite a lot mostly the measured CO is about between 9 5 and 10 High Fire CO less than 100 ppm Low Fire CO less than 10 ppm Page 41 of 51 14 EXPLODED VIEW DIAGRAMS Page 42 of 51 14 1 Burner fan gas pipe heat exchanger casing S CB 60 S CB 80 S CB 100 S CB 120 Figure 4 S CB60 S CB80 S CB100 S CB120 Page 43 of 51 14 1 1 Burner fan gas pipe heat exchanger casing Spare S CB 60 S CB 120 Spare parts S CB60 120 Duo Z GB ee a se ee 2 1 Frontpanel 31 Bumer control F 910 E04 016 277 4 Seal ring 80mm E07 004 023 32 Tube glandsiphon 5_ Airinlet connection excentr 130__ B01 008 004 35a Gasket flue gas outlet 194 150 5a Gasket air inlet connection 162 135 36 Seal ring 80mm EO 6 Automatic air vent E04 015 008 36 Seal ring 100mm E07 004 024 8 NTC sensor BOIS 38a Gasket flue gas outlet 194 150 9 insulation burner chamber E07 010 098 40 Adapter flue gas outlet 80 80 E01 008 014 10 Heat exchanger 6 3 40 Adapter flue gas outlet 80 100 E01 008 008 10 Heat exchanger 8 4 40 Adapter flue gas outlet 100 130 E01 008 009 10 Heat exchanger 10 6 41 Sealring80mm ETO 13 E G B B 5x14 mm Torx screw M5x12 DIN7985 scr
52. the same as stated on the data plate therefore according to the table on page 12 the output will be lowered by about 3 This means that the total output will be 780 kW 3 756 kW 6 7 Chosing a diameter of 150 mm for the whole 780 kW system Air inlet system uses flue material Choosing a diameter of 150 mm Resistance Horizontal duct 5 meter 5x15 75 Pa Vertical duct 8 meter 8x 15 120 Pa Bends 90 x 2 2x15 30 Pa T pieces x 4 4x15 60 Pa Roof terminal 15 15 Pa Total 300 Pa Flue Choosing a diameter of 150 mm Resistance Horizontal Flue 5 meter 5 x23 115 Pa Vertical Flue 8 meter 8 x 23 204 Pa Bends 90 x 2 2 x23 46 Pa T pieces x 4 4 x23 102 Pa Roof terminal 23 23 Pa Total 490 Pa Total resistance 300 490 790 Pa It is clear that the resistance is higher than the 250 Pa even higher than the maximum 600 Pa the diameter of 150 mm is too small Page 16 of 51 6 8 Condense water drain The condense water drain is next to the centre at the bottom of the boiler and has a inch hose discharge Connect this flexible hose to the drains via a tundish or oversize waste pipe Also consider a waste trap N B Use only plastic parts with the condense water drain Metal lines are not allowed Tip Blockage of this drain may cause damage to the boiler The drain connection is correct when the condense water can be seen flowing away e g using a funnel Any damage that may occur due to a blockage is not covered by the w
53. this control switches the boiler Off when the desired temperature reaches the temperature set on such control with or without outside temperature compensation 15 16 Cascade When two or more boilers are connected to the boiler control every boiler control connection has a built in cascade manager each boiler of the cascade has to be connected to the next boiler using a two wire bus cascade connection terminals A Flow Temperature sensor is also required available at extra cost from Strebel NOTE The cascade control must be used on multiple Boiler systems sharing the same flue Page 21 of 51 18 19 20 Remote Fault Lock out and remote signal for Heat demand Through the use of an external power e g BMS 230 VAC or 24 v one Volt Free contact closes in a Lock Out condition and the other on Heat Demand A BMS lamp or a buzzer can be connected HEAT DEMAND SUPPLY 777__ 21 22 23 Diverter Valve primary hot water circuit Diverter Valve 3 Port for charging a Calorifier DHW primary pump relay is connected to 22 amp 23 or primary pump relay 24 25 not used 26 27 28 HTG Pump Heating pump relay 27 28 29 30 31 No No connection connection 32 33 No No connection connection 34 35 Permanent The permanent supply is connected to these terminals This supply must not be 36 Supply interrupted for control purposes Page 22 of 51 7 3 Phase se
54. tion the LED is green in case there is no Heat Demand the LED is off Press button named RESET When the display is flashing there is a lock out situation by pressing this button the boiler will start again before pressing this button note the code in the display in order to record the reason for the lock out see page 27 Service Behind the small plastic cap a plug is available for connection of a cable with interface for connection to a computer This will allow extensive changes to the parameters in the boiler control when in service mode Below the plug there is a small hole through which one can push a sharp point e g ball pen this will enable the fan speed to be set by turning the CH knob when in service mode for setting the gas valve see 8 4 1 page 28 When completed push this small button once again to return to the automatic program Double pole On Off switch O no mains to the control I Control is switched on and all the components in the boiler Page 25 of 51 8 2 Sensors The boiler uses the following temperature sensors S3 to S7 when fitted S1 The flow sensor on the front left of the heat exchanger S2 The return sensor on the rear left of the heat exchanger S3 Cascade flow temperature sensor S4 NOT USED S5 DHW temperature if fitted S6 The outside temperature sensor if fitted S7 NOT USED The sensors used in the Strebel S CB are of the NTC type negative temperature coeffici
55. ue Air inlet Resistance table The output of the boiler is affected by the resistance of the air inlet and flue system At a resistance up to 250 Pa the output will be as indicated on the name plate of the boiler See page 12 for higher flue resistance Table 1 Resistance table mm Resistance inlet and outlet system Pa Item Boiler S CB 60 80 100 120 150 180 z g roof terminal 125 80 DS 45 X X X X AE 2 outside wall terminal 125 80 15 30 X X X X 5 2 roof terminal 150 100 12 30 35 40 X X outside wall terminal 150 100 10 25 28 32 X X straight tube mt 80 4 33 8 10 15 24 straight tube mt 100 1 3 Be 4 6 9 a straight tube mt 130 0 35 0 75 0 8 1 1 2 2 B straight tube mt 150 X X 0 3 0 4 0 6 1 0 2 45 bend 80 2 3 4 5 US 12 22 45 bend 100 0 6 1 5 thea p 22 4 5 2 45 bend 130 0 2 0 4 0 4 0 5 0 6 1 z 45 bend 150 X X 0 15 0 2 0 3 0 6 90 bend 80 4 5 5 8 10 15 24 90 bend 100 1 3 3 5 4 6 9 90 bend 130 0 35 0 7 0 8 1 1 2 2 90 bend 150 X X 0 3 0 4 0 6 1 straight tube mt 80 5 8 12 15 20 X S straight tube mt 100 2 3 5 4 6 9 12 E straight tube mt 130 0 45 0 8 L2 15 2 3 Z straight tube mt 150 X X 0 5 0 5 1 1 5 Z 45 bend 80 OS 4 6 5 8 14 X an 45 bend 100 1 1 7 2 3 2 4 5 6 5 45 bend 130 0 2 0 4 0 6 0 8 1 1 5 45 bend 150 X X 0 2 0 4 0 8 1 8 S 90 bend 80 5 8 12 15 20 X Ea 90 bend 100 2 3 5 4 6 9
56. yout 7 6 Electrical Circuit Diagram Page 2 of 51 o Oo O o o o Oo NAA A A bea e e e e e e e e a i i e e G o N NNN DAD UN LM LA HA NK NN NY Pa e oa A U U L oO oO Page No 8 10 11 12 13 14 PUTTING INTO OPERATION 8 1 Control panel control knobs amp L E D 8 2 Sensors 8 3 Run and Fault Codes and Display meanings 8 4 Display buttons 8 4 1 Service Button 8 5 Filling and venting the boiler and system for light up 8 6 Starting the boiler and Commissioning 8 6 1 General 8 6 2 Commissioning 8 7 Adjusting and setting the output 8 7 1 Setting the maximum output 8 7 2 Setting the minimum output 8 8 Gas conversion LONG TERM SHUTDOWN LOCK OUT USER COMPLAINT TROUBLESHOOTING 11 1 Cause of the fault 11 2 Troubleshooting table INSPECTION AND MAINTENANCE 12 1 General 12 2 Inspection 12 3 Maintenance LPG Settings SCB 60 to 120 SCB 150 to 180 EXPLODED VIEWS AND SPARES 14 1Burner fan gas pipe heat exchanger casing S CB60 S CB120 14 1 1Spare Parts S CB60 S CB120 14 2 Burner fan gas pipe heat exchanger casing S CB150 S CB180 14 2 1 Spares Parts S CB150 S CB180 14 3 Pipelines amp pumps S CB60 S CB120 14 3 1 Spare Parts S CB60 S CB120 14 4 Pipelines amp pumps S CB150 S CB180 14 4 1Spare Parts S CB150 S CB180 25 25 26 27 28 28 28 29 29 29 29 29 31 31 32 33 34 34 36 38 38 38 39 40 41 42 43 44 45 46
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