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Summary of Contents for Strebel S-CB+400
- Page 1 STREBEL S-CB Boiler Range Models 400 & 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. 2017-09-01 v1...
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Page 3: Table Of Contents
TABLE OF CONTENTS INTRODUCTION…………………………………………………………………………………………….…..6 SAFETY GUIDELINES ..........................6 TECHNICAL DATA S-CB 400 AND S-CB 550 ..................7 ............................7 NTRODUCTION ....................8 ECHNICAL SPECIFICATIONS DATASHEET ......................10 SPECIFICATION DATASHEET ..........11 AFETY MEASURES FOR PREVENTING INTERNAL FLUE GAS RECIRCULATION S-CB 400 & 550 B ..................11 ENEFITS OF THE OILER... - Page 4 S-CB 400 & 550 ..........30 AIR INLET FLUE GAS OUTLET CALCULATION EXAMPLES 8.8.1 Flue gas and air supply resistance table - concentric parts ..................30 8.8.2 Twin pipe flue gas and air supply resistance table: ....................31 8.8.3 Example A: Twin pipe system ..........................32 8.8.4 Example B: Single pipe system for flue gas outlet only ..................
- Page 5 11.2 H .............................84 EATING 11.2.1 Controlling behaviour settings ..........................84 11.2.2 Room thermostat on/off ............................84 11.2.3 Room thermostat OPENTHERM ..........................85 11.2.4 Outside temperature related flow control ........................ 85 11.2.5 0-10 VDC remote flow temperature set point ......................85 11.2.6 0-10 VDC remote burner input control ........................
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Page 6: Introduction
The following symbol is used in this manual: Warning: Important information concerning the safety of persons and/or the appliance. Strebel Ltd is not accountable for any damage caused by incorrect following the mounting instructions. For service and repair purposes use only original Strebel spare parts. -
Page 7: Technical Data S-Cb
TECHNICAL DATA S-CB 400 AND S-CB Introduction The S-CB+ 400 & 550 heating boilers are central heating boilers with a maximum high efficiency. Such performance can also be reached by using a special heat exchanger made of stainless steel. The heat exchanger helps to cool down the flue gases below their condensation point;... -
Page 8: Technical Specifications Datasheet
Technical specifications datasheet GENERAL Product Identification Number CE 0063 BS3806 Dimensions (h x w x d) 161,7 x 73,6 x 122,5 Classification II2H3P Gas Appliance Type B23, B23P; C13, C33, C43, C53, C63, C83 Type boiler S-CB S-CB CH boiler water content litres Weight (empty) Connections flow/return... - Page 9 Type boiler S-CB S-CB EMISSION [EN437] Nominal value at min. max. load flue gas G25.3, G20 min-max 9,0- 9,0 flue gas G31, G30, B/P min-max 10,0-10,5 class [EN483/ EN15420] Flue gas temperature at atmospheric tempera- °C ture of 20°C Mass flow flue gas [min-max] 24,1 - 207,8 33,1 - 285,7 condensing...
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Page 10: Erp Specification Datasheet
ERP specification datasheet. Technical parameters according the European ERP (Energy Related Products) legislation: S-CB S-CB Type Boiler: Condensing boiler: Low temperature boiler: B11 boiler: Cogeneration space heater: Combination heater: Unit: Value Value Rated heat output P-rated (P4) at 60-80⁰C Heat output (p1) 30% at 30-37⁰C 129,9 179,1 Seasonal space heating energy efficiency (ɳs). -
Page 11: Safety Measures For Preventing Internal Flue Gas Recirculation
Safety measures for preventing internal flue gas recirculation The heat exchanger of the S-CB 400 & 550 boiler contains two burners. The air supply channels of both burners are internally connected to each other, so the installer only needs to connect one air supply duct to the boiler. The controller allows the situation in which only one burner is burning, while the other one is off. -
Page 12: Description Of The Most Important Boiler Parts
Description of the most important boiler parts 1. Fan The fan is a compact unit: the motor and fan housing are an integral part and can be replaced as a complete unit. The fan varies in speed due to the boiler control, which ensures that the modulation of the boiler is attained. 2. -
Page 13: Technical Dimensions Of The S-Cb
7. Non-return valve A non-return valve fitted behind the fan will prevent recirculation of flue gases from one burner to the other burner (when this burner is not operating). 8. Heat exchanger The heat exchanger consists of spirals of stainless steel smooth tube. Through the openings between the spirals the flue gases are pushed, establishing an optimal heat transfer. -
Page 14: Accessories And Unpacking Of The Boiler
ACCESSORIES AND UNPACKING OF THE BOILER Accessories Depending on the selected controlling of the central heating system and the type of boiler, the following items can be ordered and delivered with the boiler: Item Part no. Outside (air) temperature sensor: 12 kOhm@25°C (to be mounted to the boiler connections) E04.016.585 External flow temperature sensor for behind the low velocity header: 10 kOhm@25°C (to be E04.016.304... -
Page 15: Installation Of The S-Cb
INSTALLATION OF THE S-CB 400 & 550 General notes The boiler is mounted on a pallet with a wooden “support” frame around it. The boiler is wrapped in shrink warp before the wooden support frame is mounted. After the frame is placed the whole pallet, boiler and frame package is shrink wrapped again. -
Page 16: Ventilation
• Ensure that the correct space is provided when positioning the boiler for maintenance and replacement of parts. The recommended minimum clearance is: - Side clearance: 500 mm (advised 1000 mm) - Front clearance: 800 mm - Rear clearance: 500 mm •... -
Page 17: 5.4 Mounting The Boiler
5.4 Mounting the boiler Before mounting the boiler, the installer needs to design and calculate the following parts: • Flue gas pipe connection. • Air supply connection. • Flow and return connection. • Condensate and pressure relief valve drainage. • Power supply. -
Page 18: Condensate Drain Connection
Condensate drain connection The condensate drain is placed at the centre and at the bottom of the boiler and has a ¾ inch hose discharge. Connect this flexible hose to the sewer system. Use only plastic parts with the condensate drain. Metal lines are not allowed. -
Page 19: Pressure Relief Valve
The boiler pump must be controlled by the boiler controller. If, for any reason, an external pump control is applied without written approval of Strebel, the complete warranty on the boiler and all supplied parts will become invalid. -
Page 20: Installing A Strainer And/Or Dirt Separator
Installing a strainer and/or dirt separator Always install a strainer (water filter) and/or SYSTEM WITH DIRT SEPARATOR a dirt separator on the system side after a low loss header / Strebel boiler guard / plate DIRT SEPARATOR WATER FLOW TO LLH / WATER RETURN... -
Page 21: Plastic Piping In The Heating System
6.11 Plastic piping in the heating system When plastic pipes are used in the central heating system and NOT oxygen diffusion proof to standard DIN 4726, 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. -
Page 22: Chemical Water Treatment
Higher pressure systems (e.g. in high buildings) If pressures higher than 4,0 bar occur in the heating system, the best solution is to separate the system from the boiler by means of a plate heat exchanger. Now the boiler pressure can still be under 4,0 bar and the boiler control remains as described above. -
Page 23: Installation Containing Two S-Cb
6.18.2 I 400/550 CH NON-RETURN NSTALLATION CONTAINING TWO BOILERS USING VALVES HEATING ZONE EXTERNAL SYSTEM PUMP (P3) S-CB S-CB 400/550 400/550 TOP VIEW TOP VIEW valve siphon air separator pump low loss header dirt separator automatic air vent strainer (water filter) expansion vessel pressure relief valve non-return valve -... -
Page 24: Hydraulic Graphs
HYDRAULIC GRAPHS Water pressure loss S-CB 1200 1000 Flow rate (m³/h) Water pressure loss S-CB 1200 1000 Flow rate (m³/h) • The design flow should be right for T between 25K and 20K. • The pump must be selected for each project and is not part of the standard boiler supply. -
Page 25: Flue Gas And Air Supply System
FLUE GAS AND AIR SUPPLY SYSTEM General The boiler must be commissioned and installed by a skilled installer in accordance with all applicable standards and regulations. The overall resistance of the air supply and flue terminal must not exceed a pressure drop of 200 Pa. For installation values see the table in section 8.8.2. -
Page 26: Boiler Categories - Types Of Flue Gas Systems
Boiler categories - types of flue gas systems. Type according EN 15502-2-1: 2012 Performance Description B23(P) Open * Roof terminal Flue Air supply from * Without draught diverter Outlet room * Boiler room air supply. * P = overpressure systems Be aware: The installation room has to have sufficient air supply vents. -
Page 27: C63 Certified
Closed * Appliance sold without flue/air-inlet ducts. Air supply from * The flue gas parts are not part of the boiler. The outside boiler is intended to be connected to a separately Flue outlet approved and marketed system for the supply of Air inlet combustion air and discharge of combustion products. -
Page 28: Flue Terminal
Multiple boilers can be connected to a common duct. These flue gas systems for multiple boiler installations must always be engineered as zero or negative pressure systems; this to prevent the risk of recirculation of the flue gases. In circumstances where a zero or negative pressure cannot be achieved, please call Strebel Ltd Technical Department for advice. -
Page 29: Pipe Heights And Mutual Distances On A Flat Roof
Pipe heights and mutual distances on a flat roof. Height A This is the height of the air inlet that must have a cap to prevent rainwater entering the system. When in- and outlet are mounted on a flat roof, the inlet should be at least 60 cm above the roof surface and at least 30 cm above the max- imum snow level. -
Page 30: S-Cb 400
S-CB 400 & 550 air inlet / flue gas outlet calculation examples The load of the boiler is influenced by the resistance of the air supply and the discharge system. The diameter and length of both air supply and flue gas pipes needs to be designed accurately to decrease the possible power loss of the boiler. -
Page 31: Twin Pipe Flue Gas And Air Supply Resistance Table
8.8.2 WIN PIPE FLUE GAS AND AIR SUPPLY RESISTANCE TABLE Flue gas piping Ø [mm] * Resistance [Pa] S-CB S-CB straight tube/m FLUE GAS OUTLET T-piece vertical boiler outlet 25,5 zeta = 0,0 16,7 29,7 open outlet (T-piece horizontal use values 45° 12,2 elbow) 90°... -
Page 32: Example A: Twin Pipe System
8.8.3 A: T XAMPLE WIN PIPE SYSTEM Calculation example: EXAMPLE A INLET AIR MUST BE CLEAN AND FREE OF WATER. ALWAYS USE A WIRE MESH TO INLET AIR MUST BE CLEAN AND FREE OF WATER. PREVENT DEBRIS USE A WIRE MESH WHEN BEING DRAWN INTO THERE IS RISK OF DEBRIS BEING DRAWN INTO THE... -
Page 33: Example B: Single Pipe System For Flue Gas Outlet Only
8.8.4 B: S XAMPLE INGLE PIPE SYSTEM FOR FLUE GAS OUTLET ONLY Calculation example: INLET AIR MUST BE CLEAN AND FREE OF WATER. ALWAYS USE A WIRE MESH TO PRE- VENT DEBRIS BEING DRAWN INTO THE AIR INLET. Boiler type: S-CB Diameter: 180 mm. -
Page 34: Example C: Twin Pipe System With Wall Mounted Air Duct
8.8.5 C: T XAMPLE WIN PIPE SYSTEM WITH WALL MOUNTED AIR DUCT Calculation example: Pressure drop flat T-piece equals one 45° elbow INLET AIR MUST BE CLEAN AND FREE OF WATER. ALWAYS USE A WIRE MESH TO PREVENT DEBRIS BEING DRAWN INTO THE AIR INLET. -
Page 35: Example D1: Twin Pipe System With Concentric Roof Terminal
8.8.6 D1: T XAMPLE WIN PIPE SYSTEM WITH CONCENTRIC ROOF TERMINAL The example calculation is INLET AIR MUST BE CLEAN only valid using the AND FREE OF WATER. concentric roof terminal. ALWAYS USE A WIRE MESH TO PREVENT DEBRIS BEING DRAWN INTO THE AIR INLET. -
Page 36: Example D2: Twin Pipe System With Concentric Roof Terminal
8.8.7 D2: T XAMPLE WIN PIPE SYSTEM WITH CONCENTRIC ROOF TERMINAL The example calculation is INLET AIR MUST BE CLEAN only valid using the AND FREE OF WATER. concentric roof terminal ALWAYS USE A WIRE MESH TO PREVENT DEBRIS BEING DRAWN INTO THE AIR INLET. -
Page 37: Separate Air Supply And Flue Terminal For A Pitched Roof
Separate air supply and flue terminal for a pitched roof Connection tube. Pitched roof adhesive flashing. Flue gas roof door terminal. Air inlet roof duct. 90° bend. Ventilation grill. Condense water drain. 8.10 Separate air supply and flue terminal for a flat roof Connection tube. -
Page 38: Electrical Installation
For signal cables only low voltage, use the right conduit to connect them to the connectors on the front side. The boiler pump must be controlled by the boiler control. If, for any reason, an external pump control is applied without written approval of Strebel, the complete warranty on the S-CB 400/550 boiler and all supplied parts will become invalid. -
Page 39: Connections
Connections The following components can be connected to the boiler; see the figure below. For voltages from 110V to 250V use the left conduit and for low voltage use the right conduit. OUTDOOR EXTERNAL CALORIFIER FLOW SENSOR SENSOR SENSOR THERMOSTAT 10 11 12 19 20 21 22 23 24 34 35 36... -
Page 40: Connecting The Power Supply And Boiler Pump P1, 230V/1
Connecting the power supply and boiler pump P1, 230V/1~ or 400V/3~ • Connect the power supply to the connecting block on the front top side of the unit. See figure below. • A 230V/1~ pump must be connected to the relay besides the power supply connectors, according to the top figure below. -
Page 41: Fuses
Fuses The four fuses of the S-CB 400/550 are located on the PCBs: two fuses on each circuit board. Fuse no. Application Fused value Fuse type Pump 1 250 VAC 5AT H 5 AT ceramic filled fuse Pump 2 / TWV Switch mode supply Gas valve 250 VAC 5AT H... - Page 42 19-20 LOCK-OUT TOP OR PUMP ON/OFF This contact is N.O. (normally open max. 230 Vac, 0,8 A). When the unit is in lock-out this contact will close. This contact can also be used for the switching of a pump with a separate control input connection, in which case a parameter change is needed.
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Page 43: Sensors
Sensors The following temperature sensors have been fitted in the boiler (S1 and S2 on the rear / right-side of the heat- exchanger and one for each burner): Flow temperature sensor (orange wire) Return temperature sensor (green wire) External flow temperature sensor Calorifier/tank temperature sensor (if connected) Outside temperature sensor (if connected) Flue sensor (white wire) -
Page 44: Electrical Circuit Diagram Top Burner (Pcb A, Left)
Electrical circuit diagram Top burner (PCB A, left) internal connections ionistion and/or ignition display siphon pressure switch (PSW) N.C. Non Return Valve NRV end contact 10 1 ref.1 clixon/maximum (S7) water thermostat 24vdc CN15 fan Hall CN10 fan control fan PWM +24Vdc 24Vdc not used... - Page 45 separate ionisation input. (always active) boiler casing ignition transformer incl. WIRING COLORS ionisation input. K0=white K6=blue K1=yellow K7=red K2=brown K8=black K3=green K9=purple K4=grey K10=yellow/green K5=orange CN not used 9 10 CN10 cascade connection 230Vac mains (internal) pump relay 34 35 LOCK-OUT BURNER HEAT...
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Page 46: Electrical Circuit Diagram Bottom Burner (Pcb B, Right)
Electrical circuit diagram Bottom burner (PCB B, right) internal connections ionisation and/or ignition display bottom Non Return Valve NRV end contact 10 1 clixon/maximum (S7) water thermostat 24vdc CN15 K0=w K1=y fan Hall CN10 fan control fan PWM K2=b +24Vdc K3=g K4=g 24Vdc... - Page 47 separate ionisation input. (always active) boiler casing ignition transformer incl. WIRING COLORS ionisation input. K0=white K6=blue K1=yellow K7=red K2=brown K8=black K3=green K9=purple K4=grey K10=yellow/green K5=orange CN not used 9 10 CN10 LOCK-OUT BURNER HEAT BURNING DEMAND N.O. N.O. N.O. connection connection examples examples...
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Page 48: User Interface
USER INTERFACE 10.1 Control panel / display unit There are two control panels that have been placed on top of each other. The top panel controls the burner at the top of the heat exchanger and is called “master”. This panel controls the complete boiler. -
Page 49: Menu Structure
10.2 Menu structure NOTICE: Pressing too long will switch off the BASE SCREEN : (appears during operation) boiler. HEATING : No demand / Standby / burning > > > : 1 1 8 ° C ( 1 2 5 ° C ) . - Page 50 HOW TO CONFIRM CHANGES When changes have been made in one of the nine menus below, the user presses ENTER to confirm these changes. To prevent making unintentional changes, the following happens when changes are made: Step 1: The user presses [ENTER] to confirm the change made or [MENU] to exit the menu without changes.
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Page 51: Display During Operation
10.3 Display during operation During normal operation, the text in the display shows the status of the boiler. In the following graphs, the several displays during normal operation are explained. Display at HEATING DEMAND Heat demand type: Actual status: S T A N D - B Y >... -
Page 52: Monitor Screens
10.4 Monitor screens During normal operation and stand-by, the “◄” and “►” buttons can be used to show some boiler information, in- cluding measured temperatures, settings and data. In the following graphs is explained which values can be shown in the display. When no button is activated for 2 minutes, the display will return to its status display. Pressing [◄] or [►] while being at the "operating screen"... - Page 53 SCREEN: C a s c D e s i g n 0 = MASTER, 1 ..11 = SLAVES C a s I n f 0 1 2 3 4 5 6 7 8 9 A B Displays number, priority and state of cascade boilers. DESCRIPTION "CASCINFO"...
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Page 54: Service Function
10.5 Service function The following graphs describe how to use the service function. Operating screen: H E A T I N G : N o d e m a n d > > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C ) Press [SERVICE] and hold for three seconds. -
Page 55: Schornsteinfeger Function
10.6 Schornsteinfeger function The following graphs describe how to use the Schornsteinfeger function. NOTICE: This function is required for Germany and can be activated by parameter (P5 BK). The standard factory setting for this function is “OFF”. The purpose of this function is to have an easy interface for the "Schorn- steinfegers"... -
Page 56: Programming In Standby Mode
10.7 Programming in standby mode Standby Use the standby mode for modifying boiler settings without interaction with the boiler control. Changes are effectu- ated at leaving standby mode. Properties of standby mode: • Keys are active and the menu is accessible. •... -
Page 57: Set Points
10.9 Set points The following graphs describe how to program the heating and hot water set points. NOTICE: The hot water set points are only displayed, when the boiler is programmed as an indirect hot water boiler or direct hot water boiler. See parameter P4 AA for the exact boiler configuration. Operating screen: H E A T I N G : b o i l e r... -
Page 58: 10.10 Setting The Timer Programs
NOTICE: DHW set point normal/day time: The max actual DHW (parameter P4 AA = 1/2) temperature will never exceed the D H W s e t p o i n t value set at “Heating Setpoint” ° C regardless the set DHW setpoint. This is the water temperature set point that is active during If higher DHW setpoints are the programmed DHW periods (parameter P4 AA = 1/2). - Page 59 HEATING PROGRAM Three programmed periods each day can be set (period 1, period 2 and period 3). During these periods, the unit will use the normal CH and DHW set points. Outside the programmed period(s) the unit will use the reduced temperature as set point.
- Page 60 HOT WATER PROGRAM > > > From previous page with HEATING part < < < Setting DHW program times: P r o g r a m D H W M o n 2 3 : 0 0 Press [►] to browse through the values that can be set at the bottom line.
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Page 61: 10.11 Setting The Outdoor Specifications
ANTI LEGIONNAIRES’ DISEASE PROGRAM The anti-Legionnaires’ disease (pasteurisation) program of the boiler can only be used when the boiler is set as an “indirect” boiler configuration or a “direct” hot water boiler configuration. Only these configurations can activate the day and time program of the anti-Legionnaires’ disease function. See the following graphs. The standard factory setting for this function is “OFF”. -
Page 62: Outdoor Graph - Main Settings
10.11.2 O UTDOOR GRAPH MAIN SETTINGS HEATING CURVE - main settings P5 AD - Flow temp at outside temp low P6 BC - Parallel shift P5 AF - Flow temp at outside temp high OUTSIDE TEMPERATURE P5 AE P5 AC outside temp high outside temp low Curve and values only for illustration purposes, programmed parameter values can deviate! -
Page 63: Outdoor Graph - Additional Settings
10.11.3 O UTDOOR GRAPH ADDITIONAL SETTINGS HEATING CURVE - additional settings P6 BA - max flow temp P6 BB - Heatcurve night shift P5 AH - Warm weather shutdown P2 HA - Outdoor sensor hysteresis P5 AG - min flow temp OUTSIDE TEMPERATURE Curve and values only for illustration purposes, programmed parameter values can deviate! P5 AG... -
Page 64: Display
10.11.4 D ISPLAY The following graphs describe how to programme the outdoor graph settings. Operating screen: H E A T I N G : b o i > > > : 1 2 3 . 4 ° C ( 1 2 3 4 °... -
Page 65: 10.12 Checking The Operating History
10.12 Checking the operating history The following graphs describe how to check the operating history of the boiler. Operating screen: H E A T I N G : b o i > > > : 1 2 3 . 4 ° C 1 2 3 . -
Page 66: 10.13 Checking The Fault History
10.13 Checking the fault history The following graphs describe how to check the fault history of the boiler. Operating screen: H E A T I N G : b o i l e r > > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C ) Press [MENU] Select "Faulthist"... -
Page 67: 10.14 Setting The Maintenance Specifications
10.14 Setting the maintenance specifications MAINTENANCE SETTINGS The unit can be programmed in such a way that an automatic maintenance message is displayed. Three options can be selected. A maintenance message appears after: * A programmed date is reached. * An amount of burning hours is reached. * An amount of ignition cycles is reached. - Page 68 From previous page Screen: Selecting message at certain date. M a i n t e n M o d e D a t e Press [►] to set: The date for the maintenance message. Press [◄] to: Return to maintenance mode selection. Press [►] to browse through the values that can be set at the bottom line.
- Page 69 From previous page Screen: Message after total amount of burning hours. M a i n t e n M o d e B u r n i n g h o u r s Press [►] to set: The total amount of burning hours for the Maintenance message. Press [◄] to: Return to maintenance mode selection.
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Page 70: 10.15 Setting The User Lock
10.15 Setting the user lock The following graphs describe how to activate the user lock of the display. The standard factory setting for this func- tion is “OFF”. The "USER LOCK" menu. In this menu the boiler can be locked for (end-)users. 0 = UNLOCKED 1 = LOCKED When the boiler is unlocked, the user can enter the... -
Page 71: 10.16 Setting The Parameters At The Control Panel
10.16 Setting the parameters at the control panel The functions of the controller are embedded in de electronics by means of parameters. The values and settings hereof can be programmed by a skilled and trained service engineer with the help of a computer (laptop), the correct software and an interface cable. - Page 72 Operating screen: H E A T I N G : b o i o f f > > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C ) The screen texts on these pages are standard part of Press [MENU] the software and apply to...
- Page 73 Menu A: Heating The screen texts on these c P r b pages are standard part of the software and apply to ° C systems (boilers) Select the cascaded boilers supply temperature control. and/or DHW devices This parameter is the proportional range of the selected CH (water heaters).
- Page 74 Menu B: Hot water The screen texts on these L e g i o t e m p pages are standard part of ° C the software and apply to systems (boilers) Pasteurisation function of the boiler. This parameter is the se- and/or DHW devices lected hot water temperature during the pasteurisation func- (water heaters).
- Page 75 Menu B: Hot water The screen texts on these D H d s c l n t 2 3 pages are standard part of 2 0 0 S e c the software and apply to Function for the direct hot water boiler. systems (boilers) This parameter is the integration time of the selected HW tem-...
- Page 76 The screen texts on these Menu C: Cascade pages are standard part of the software and apply to systems (boilers) and/or DHW devices (wa- Function for the cascading of the boiler(s). ter heaters). This parameter is activated when an external (extra) boiler is connected to the Master boiler.
- Page 77 Menu D: General The screen texts on these M a x C o o l pages are standard part of the software and apply to systems (boilers) Function for setting the maximum overrun time of the fan and/or DHW devices (Maximum 10 minutes).
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Page 78: 10.17 Fault Codes Display
10.17 Fault codes display The following graphs describe the lock out codes of the boiler. A lock out code can only be removed by a manual resetting of the boiler. NOTICE: Before resetting the boiler always check the boiler, central heating system and all components corresponding to the related lock out description. - Page 79 Display message e m p p u m p 9 9 9 Reason Flue gas temp. exceeds the limit more than 3 times within a certain time frame. Display message N o n p u m p 9 9 9 Reason Contact signal of the non-return valve failed.
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Page 80: Blocking Codes
10.17.2 B LOCKING CODES The following graphs describe the blocking codes of the boiler. A blocking code is only a temporary blocking of the boiler, because of an extraordinary situation. The boiler will continue to operate after stabilisation of this situation. The display is not blinking, but is lightened up during the blocking period. -
Page 81: Important Message
Display message e m p 9 9 9 Reason Return temperature has exceeded the blocking temperature, but the return temperature has not exceeded the lock-out value. Display message 9 9 9 Reason Temperature difference T2-T1 has exceeded the blocking value. Display message e s s u 9 9 9... -
Page 82: Controlling Options And Settings
CONTROLLING OPTIONS AND SETTINGS 11.1 General The following paragraphs describe some general functions of the boiler and their possible use. 11.1.1 E XTRA BOILER CONTROL When all units (cascaded) are firing at their maximum it is possible to start an extra “external” heating source. This unit can be connected to the “Burner Burning”... -
Page 83: Soft Start Option
In case of gas conversion, paste the corresponding sticker at the appropriate PROPANE G31 P PROPAN P4BD = 1 position in the boiler and mark the square for PROPANO the used gas type. Also mark the square, PROPAAN indicating that the correct value has been set BUTANE/PROPANE for parameter P4BD. -
Page 84: Heating
11.2 Heating The following paragraphs describe the different functions of the boiler and their related “controlling behaviour settings” as a central heating boiler. 11.2.1 C ONTROLLING BEHAVIOUR SETTINGS The factory settings for all heating applications are working fine and it is therefore advised not to change these settings. -
Page 85: Room Thermostat Opentherm
11.2.3 R OPENTHERM OOM THERMOSTAT An RC OpenTherm controller can be connected to the boiler for temperature reading(s) and remote programming (connections 13-14). 11.2.4 O UTSIDE TEMPERATURE RELATED FLOW CONTROL The flow temperature set point can be calculated by using the measured outside temperature for controlling the boiler. -
Page 86: Vdc Remote Burner Input Control
11.2.6 0-10 VDC REMOTE BURNER INPUT CONTROL The burner input is controlled by connecting an external 0-10 VDC signal to the boiler (connections 15-16). P5 BB Analogue input Config (0=off 1=temp 2=power) (display D1). This parameter must be set at "2" so the supplied 0-10V dc signal will control the burner input. The standard factory setting is ‘1’, temperature set point control. -
Page 87: Indirect Hot Water / Calorifier
11.3 Indirect hot water / calorifier The following paragraphs describe the different functions of the boiler and their related “controlling behaviour settings” as a central heating boiler with an indirect hot water function. 11.3.1 PUMP AND WAY VALVE CONTROL See chapter 19 for several installation examples of the boiler and the preferred functions. When the boiler is used as an indirect boiler for both central heating and hot water function, this hot water function can be activated by using a DHW pump or a 3-way valve. -
Page 88: Low/High Flow Temperature To Tank Coil
11.3.4 L HIGH FLOW TEMPERATURE TO TANK COIL This function can only be used for an “indirect” programmed boiler (parameter P4 AA = 1). Normally for a regular calorifier a fixed flow temperature of 85°C is supplied to the calorifier heat exchanger in case of a heat demand. -
Page 89: Heating And Hot Water Switching Time
11.3.5 H EATING AND HOT WATER SWITCHING TIME This function can only be used for an “indirect” programmed boiler (parameter P4 AA = 1). In case there is a heating demand and the unit is operating for this heating demand, also a hot water demand can be activated. -
Page 90: Anti-Legionnaires' Disease (Pasteurisation) Function
’ 11.3.7 ANTI EGIONNAIRES DISEASE PASTEURISATION FUNCTION This function can only be used for an “indirect” programmed boiler (parameter P4 AA = 1), on which a DHW program is active. To prevent Legionnaires’ disease the boiler (software) provides a function for heating up the hot water storage tank (once a week) to a higher water temperature then the normal active hot water set point. -
Page 91: Cascade Control
11.4 Cascade control Before commissioning a cascade installation, several parameters have to be changed. These parameters can be programmed on the unit itself, without the use of a computer. NB! Remember that a S-CB 400 & 550 boiler is already a cascade of two burners, so cascading these boilers gives a multiple of 2-burner cascades. - Page 92 PARAMETERS PARAMETERS PARAMETERS PARAMETERS master slave 2 slave 4 slave 6 slave 1 slave 3 slave 5 slave 7 CASCADE CONNECTION Now on each single boiler of the cascade, on both control panels, the following two parameters must be selected and programmed according to the above drawing.
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Page 93: Monitor Screens
When cascade connection is programmed correctly, the boiler display will show the following. Explanation "Cascade communication indicator" NO CASCADE COMMUNICATION > > > no.1 Always showing the fixed ">>>" CORRECT CASCADE COMMUNICATION > > no.1 > no.2 Showing alternating no.1 & no.2 with 1 second interval. 11.4.2 ONITOR SCREENS To obtain cascade information, see chapter 10.4. -
Page 94: Commissioning The Boiler
COMMISSIONING THE BOILER 12.1 First: flushing the boiler with water After installation of the boiler the first step, before commissioning, is to flush the whole heating installation with fresh water to remove pollution, debris and other materials that might cause a blocking with the S-CB isolated from the system. - Page 95 By pressing the [SERVICE] button of the boiler, the boiler can be started without a heating demand. The boiler will start to fire and also the pump will start to run. Firing of the boiler without a water flow (but filled with water!) will cause the so called “boiling noises”.
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Page 96: Starting The Boiler
STARTING THE BOILER 13.1 General Check the gas pressure available at the gas connection pipe of the boiler. Use the pressure nipple (4)* of the gas safety valve for this measurement. The gas input pressure for the boiler, to operate properly under the correct load, must be at least 20 mbar at high fire. -
Page 97: Firing For The First Time
13.2 Firing for the first time After commissioning the boiler (chapter 11.4) and avoiding any possible heat demand (remove the thermostat con- nection lead), the boiler displays the following message: Display message H E A T I N G : d e m a n d >... -
Page 98: Adjusting And Setting The Burners
ADJUSTING AND SETTING THE BURNERS Before carrying out any adjusting of the burner, carefully read this complete chapter. 14.1 Introduction The burner must always be adjusted in the next situations: - A new boiler is installed - As part of a service/maintenance check, in case the CO values turn out to be incorrect. - Page 99 Gas type G20, G25.3 The CO level may never be in the hatched area. Figure 1: adjust 4,5 % 9,2 % max load O.K. 4,8 % 9,0 % adjust adjust 4,8 % 9,0 % min load O.K. 5,1 % 8,8 % adjust Propane G31: The CO...
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Page 100: Gas Valve Setting Screws: Drawing
Check the setting of parameter P4BD (gas type) 0 = Standard gas; e.g.: Natural gas G20 or G25.3 1 = Propane G31 2 = Mixture of Butane/Propane, B/P (G30/G31) Table 2 pre-adjustment settings gas valves for S-CB+ 400 & 550 BIC boilers number of turns open (counter clockwise) nat. -
Page 101: How To Remove And Mount The Flue Plug
14.1.4 H OW TO REMOVE AND MOUNT THE FLUE PLUG Make sure during measurement in one measuring hole, that the other one is closed. When several measurements are done in both holes alternately, the unused hole may be temporarily Scotch taped or closed by means of a rubber plug. AFTER FINISHING ALL MEASUREMENTS, CLOSE BOTH HOLES USING THE ORIGINAL PLUGS. -
Page 102: Adjustment Actions: General Scheme
14.1.5 A DJUSTMENT ACTIONS GENERAL SCHEME General scheme for adjustment of the gas valve(s). Consult this scheme for an overview. To complete all necessary adjustments in right order, follow case A or B top-down through the scheme (B involves a few extra steps (grey text blocks)): GENERAL SCHEME: ADJUSTMENT STEPS Case A Case B... -
Page 103: Note: Co 2 Measuring Position
14.1.6 N : CO MEASURING POSITION This chapter describes the procedure for adjusting and checking CO values by measuring at the front of the boiler, using the upper measuring hole for adjusting the top burner and the lower measuring hole for adjusting the bottom burner. -
Page 104: Checking And Adjusting The Bottom Burner
Minimum load adjustment. • Press [▼] button until minimum load is reached. Display message H E A T I N G : S e r 3 0 % > > > 1 2 3 . 4 ° 1 2 3 . 4 °... -
Page 105: Adjusting After Gas Valve Replacement Or In Case Of Gas Conversion (Case B)
14.3 Adjusting after gas valve replacement or in case of gas conversion (case B) In case of gas conversion, apply the corre- PROPANE G31 P PROPAN P4BD = 1 sponding sticker at the appropriate position in PROPANO the boiler and mark the square for the used PROPAAN gas type. -
Page 106: Setting Parameter P4Bd Gas Type (Display D8)
14.3.3 S P4BD ETTING PARAMETER GAS TYPE DISPLAY In case of gas conversion, change parameter P4BD to the correct setting for both burners, for the top burner on the left control panel and for the bottom burner on the right control panel: •... -
Page 107: Putting The Boiler Out Of Operation
PUTTING THE BOILER OUT OF OPERATION It is recommended to have the boiler operational all year round to prevent any frost damage during the winter and/or rotating parts getting jammed during other times of the year (built in boiler safety features). OUT OF OPERATION: On/off function. -
Page 108: Fault Codes, Blocking Codes
FAULT CODES, BLOCKING CODES 16.1 Fault codes IMPORTANT: To avoid electric shocks, disconnect electrical supply before performing troubleshooting. To avoid burns, allow the unit to cool before performing troubleshooting. Be aware that a fault code is an indication that the unit or the system needs attention. When repeatedly having faults, these should not be neglected. - Page 109 Display message b u r n e r p u m p 9 9 9 h r s Reason Boiler not operational after 4 starting attempts. Cause: No spark. Corrective action: Check the ignition electrode and replace/clean if necessary. Check the state of the ceramic insulator. A small crack can prevent the spark to form at the end of the electrode.
- Page 110 Display message F a n s p e e d n c o r r e c p u m p 9 9 9 h r s Reason Actual fan speed differs from the unit rpm set point. Cause: An incorrect fan speed is detected. Corrective action: Check the 4-wired wiring and connections at the fan and at the main control board.
- Page 111 Display message T e m p p u m p 9 9 9 h r s Reason: Max. flow temperature exceeds limitation (lock-out) value. Cause: The water flow is restricted. Corrective action: Check functioning of the pump. Check/open all valves that might restrict the water flow through the unit. Check for an external system pump that influences flow through the unit.
- Page 112 Display message e m p t o o p u m p 9 9 9 h r s Reason Flue gas temperature exceeded three times the limitation value within a certain period. Cause: Heat exchanger polluted and not able to transfer enough heat to system water. Corrective action: Check and clean heat exchanger.
- Page 113 Display message p r o g r a m m i e n d p u m p 9 9 9 h r s Reason Programming of the parameters completed successfully. Cause: Programming of the parameters completed successfully. Corrective action: This message occurs to confirm the end of programming.
- Page 114 Display message p h o n s w i p u m p 9 9 9 h r s Reason: Siphon pressure switch detects high pressure in the flue/siphon system. Cause: There is too much resistance in the flue gas circuit causing high pressure in the heat ex- changer at the flue gas side.
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Page 115: Blocking Codes
16.2 Blocking codes The following graph describes the blocking codes of the boiler. A blocking code is only a temporary blocking of the boiler, because of an extraordinary situation. The boiler will continue to operate after stabilisation of this situation. The display is not blinking, but is lightened up during the blocking period. - Page 116 Display message e m p 9 9 9 h r s Reason Flue gas temperature has exceeded the limit. Cause: Heat exchanger polluted and not able to transfer enough heat to the system water. Corrective action: Check and clean heat exchanger. Cause: Bad flue gas sensor or sensor connection (partly shorted.) Corrective action:...
- Page 117 Display message p u m p 9 9 9 h r s Reason Bad power supply Cause: The supplied power does not comply with the specifications. Corrective action: Check if the power supply is connected correctly to the unit. Check the voltage and frequency. (Should be Life Neutral, Gnd > 230Vac/50Hz). Make sure there is no signal failing or voltage peaks in the power supply.
- Page 118 Display message O u t d o o r s e n s o r 9 9 9 h r s Reason No outdoor sensor detected. Cause: The unit is programmed to check if an outdoor sensor is present and does not detect an outdoor sensor.
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Page 119: Maintenance Attention Message
16.3 Maintenance attention message The display shows alternating the base screen and this message, while backlight is blink- ing. The boiler is operating, but will count the exceeding hours. A parameter must be changed, after service, to remove this message. Display message N e e d s e n a n c y c... -
Page 120: Maintenance
MAINTENANCE 17.1 General For a good, safe and long-time operation of the boiler it is advised to carry out maintenance and service on the boiler. Maintenance and inspection of the boiler should be carried out at the following occasions: • When several similar error codes and/or lock-outs appear. - Page 121 Service history The operational and fault history (total amount and since the last service) of the boiler can be retrieved with the help of a computer, correct software and an interface cable. This information can be used to specify the maintenance and service proceedings in relation to the boiler(parts).
- Page 122 Mounting the burner door correctly back onto the heat exchanger: IMPORTANT: Before mounting the burner door, make sure that its gaskets and insulation are in excellent shape. If any signs of damage or ageing are present, these parts must be replaced. The burner door must be mounted back on the heat exchanger as follows, see picture below: - Place the burner door with its holes over the six threaded studs, numbered 1 to 6 in the picture.
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Page 123: User Instructions
Siphon Disassemble the siphon and clean every part of it. Check the siphon connection of the heat exchanger for any blocking or pollution and clean it (if necessary). Check the functioning of the siphon by pouring clean tap water in the burner room (when burner door is removed). -
Page 124: Examples Of Installations
Examples of installations The following drawings are presenting possible ways for installing the boiler. SYSTEM 1 HEATING ZONE EXTERNAL BOILER PUMP Table for system 1: Code Name Wire terminal Part nr. Boiler pump Relay pump1 Modulating room unit with timer 13-14 S04.016.355 BOILER... - Page 125 SYSTEM 4 HEATING ZONE SIGNAL FOR CONTROLLING P3: 230 VAC. A RELAY NEEDS TO BE ADDED TO SWITCH PUMP3 (P3) Table for system 4: Code Name Wire terminal Part nr. Boiler pump Relay pump1 BOILER 34-36 System pump (230 Vac control signal) Low loss header Modulating room unit with 13-14...
- Page 126 SYSTEM 6 HEATING ZONE SIGNAL FOR CONTROLLING P3: 230 VAC. A RELAY NEEDS TO BE ADDED TO SWITCH PUMP3 (P3) Code Name Wire terminal Part nr. Boiler pump Relay pump1 34-36 (230 Vac System pump control signal) BOILER BOILER Low loss header Non-return valve Modulating room unit with 13-14...
- Page 128 Strebel Ltd Unit 10, Invincible Industrial Estate, Invincible Road, Farnborough, Hampshire, GU14 7QU. 01276 685422 01276 685405 info@strebel.co.uk www.strebel.co.uk Further information on our complete product range is available from our website. CAST IRON – CONDENSING – STEEL SHELL – WATER HEATERS – RENEWABLES...
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