Strebel S-CB Px 120 Installation Operating & Maintenance Manual Download Page 30

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S-CB Px 120 Manual

8.7.3.

PEN VERSION

(B23,

B23P,

B33)

In case of an open air supply according to B23/B23P/B33, the boiler air inlet is open and has not
been connected, so only the flue gas discharge is connected and the boiler gets its combustion
air directly from the boiler room.

In this case:

The boiler room must be provided with the necessary air inlet opening(s).

These air inlet opening(s) must remain open at all times and may not
be reduced or closed.

Summary of Contents for S-CB Px 120

Page 1: ...STREBEL S CB Px 120 Wall hung high efficiency condensing boiler Installation Operating Maintenance Manual 2015 04 21 v3 ...

Page 2: ...S CB Px 120 Manual 2 ...

Page 3: ...NT 20 6 13 AUTOMATIC WATER FILLING SYSTEMS 20 6 14 WATER PRESSURE 21 6 15 CHEMICAL WATER TREATMENT 21 6 16 UNDER FLOOR HEATING 21 6 17 FLUSH THE SYSTEM WITH FRESH WATER 21 6 18 INSTALLATION EXAMPLES 22 6 18 1 Example of a low resistance heating circuit 22 6 18 2 Example of a normal single boiler heating circuit preferable 22 6 18 3 Example of a multiple boiler heating circuit 23 7 HYDRAULIC GRAPH ...

Page 4: ...sages 69 11 CONTROLLING OPTIONS AND SETTINGS 70 11 1 GENERAL 70 11 1 1 Extra boiler control 70 11 1 2 Max cooling time 70 11 1 3 Temperature display on off 70 11 1 4 Water pressure 70 11 1 5 Gas type selection 70 11 1 6 Soft start option 71 11 1 7 Pump mode EC technology 71 11 2 HEATING 72 11 2 1 Controlling behaviour settings 72 11 2 2 Room thermostat on off 73 11 2 3 Room thermostat OPEN THERM 7...

Page 5: ...D 86 14 3 GAS CONVERSION BUTANE PROPANE B P 88 15 PUTTING THE BOILER OUT OF OPERATION 89 15 1 OUT OF OPERATION ON OFF FUNCTION 89 15 2 OUT OF OPERATION POWER OFF 89 16 FAULT CODES AND BLOCKING CODES 90 16 1 FAULT CODES 90 16 2 BLOCKING CODES 96 16 3 MAINTENANCE REMINDER FUNCTION 99 17 MAINTENANCE 100 17 1 GENERAL 100 17 2 ANNUAL INSPECTION MAINTENANCE 100 18 USER INSTRUCTIONS 103 19 INSTALLATION E...

Page 6: ...S CB Px 120 Manual 6 ...

Page 7: ...ules that apply and only be used in an adequately ventilated space conforming to standards in place Without written approval of the manufacturer the internals of the boiler may not be changed When changes are executed without approval the boiler certification becomes invalid Commissioning maintenance and repair must be done by a skilled installer engineer according to all applicable standards and ...

Page 8: ... being in stalled Key Approved Documents to the Building Regulations in the region of the United Kingdom that this prod uct is being installed The Local Building Regulations and Local water by laws the gas services area and the Local Authority recommendations The appropriate British European Standards for the type of installation and fuel used including but not exclusively the following standards ...

Page 9: ...on from each boiler Weather compensation control Calorifier control Connections for Boiler pump 0 10 VDC remote flow temperature set point control 0 10 VDC remote burner input control Outside temperature sensor External calorifier pump or diverter valve Cascade control When using the integrated cascade control a maximum of twelve boilers can be controlled in a cascade configu ration By the use of ...

Page 10: ...nput Hs G30 1 kW 34 7 120 Nom output 80 60 kW 24 7 106 Nom output 50 30 kW 27 2 116 Nom output 37 30 kW 28 1 120 Efficiency 40 30ºC DIN 4702 8 up to 110 6 GAS CONSUMPTION EN437 Values min max amounts Natural gas G25 m st h 3 20 13 7 Natural gas G20 m st h 2 75 11 8 Propane gas G31 1 m st h 1 06 4 54 Butane gas G30 1 B P m st h 0 99 3 44 Supply pressure nom 2 G25 mbar 25 G20 mbar 20 G31 1 mbar 30 3...

Page 11: ...ION Max flow temperature C 90 Hydraulic resistance of the boiler at ΔT 20 K Head mWC 3 8 Hydraulic resistance of the boiler at ΔT 25 K Head mWC 2 4 Pressure CH system min max 5 bar 1 4 ELECTRIC Power supply V Hz 230 50 Power consumption W 150 Protection class IPX4D NOTES 3 CO2 of the unit measured set without the boiler door in place 4 Maximum combined resistance of flue gas and air supply piping ...

Page 12: ...g ring and pipe support bracket Flue gas outlet Condensate discharge Flexible hose Ø25 21 x 800 mm Gas supply connection Circulation flow connection Circulation return connection Circulation pump side 461 237 118 311 91 Ø100 495 468 842 65 R 1 2x R 65 76 119 72 235 77 Ø100 176 828 135 ...

Page 13: ...C to be mounted to the boiler connections E04 016 303 Conversion set for parallel to concentric flue air terminal 100 100 100 150 E61 001 186 Software interface cable for programming the boiler with a computer laptop S04 016 586 Propane butane air restrictor kit S05 000 149 4 2 Unpacking The S CB Px 120 boiler will be supplied with the following documents and accessories One Unpacking instructions...

Page 14: ...se depending on the total heat demand The boiler location should minimise any disturbance this might cause Preferably mount the boiler on a brick wall There must be sufficient lighting available in the boiler room to work safely on the boiler When a boiler is positioned at the highest point of the installation the supply and return pipes must first pro trude 0 5 m above the top of the boiler befor...

Page 15: ...ne the position of the flow and return pipes by using the included suspension bracket or a suspension frame when supplied While marking the holes ensure that the suspension bracket or frame is perpendicular and the boiler does not lean forward If necessary adjust the position with the adjusting bolts at the lower rear side of the back panel see drawing When the adjusting bolts aren t sufficient fi...

Page 16: ...sure that no extra tension forces and or tor ques are applied to the connecting pipes and or the boiler and the boiler suspension Keep the connections fixed in place as shown in the picture by using two wrenches 6 1 2 GAS CONNECTION Always install a manual shutter valve in the gas supply line directly underneath the boiler NOTICE This valve is NOT delivered with the boiler 2 1 5 4 3 ...

Page 17: ...o the sewage system see also the picture on page 14 Pressure fluctuations in the sewer system may not affect the pressure in the condensate drain hose supplied with the siphon Open connection to sewer The siphon must be checked at least once a year Disassemble the siphon and clean every part of it Check the functioning of the siphon by filling it with water Then blow into the top condensate inlet ...

Page 18: ... the pressure relief valve is mounted between the boiler and the service valves The pressure relief valve must always be installed in such a way that it cannot be isolated from the boiler by a valve The specifications and size of the relief valve should be determined by the installer and must comply with all applicable regulations and boiler capacity 6 6 Bypass The boiler has no internal bypass Wh...

Page 19: ...l shut down as soon as the return temperature has reached the 10 C The mentioned temperatures are related to the temperatures measured by the RETURN sensor of the boiler This frost protection function will not fire up the boiler in case of a general blocking of the burner demand NOTICE This frost protection is only to reduce the risk of frost damage to the boiler not the whole system Be aware that...

Page 20: ...e separated from the boiler system by using a plate heat exchanger Diffusion of plastic can cause air to enter the heating system Be aware that plas tic piping is often used in under floor heating systems When no measures have been taken to prevent the en trance of air into the boiler system the warranty of the boiler and any boiler part may be deemed invalid 6 12 Automatic air vent This automatic...

Page 21: ...tem from the boiler by means of a plate heat exchanger Now the boiler pressure can still be under 4 0 bar and the boiler con trol remains as described above Without plate heat exchanger above 4 0 bar a water pressure switch has to be built into the boiler instead of the water pressure sensor the maximum allowed value in the boiler now is 6 0 bar and the boiler control needs to be adjusted 6 15 Che...

Page 22: ...tor strainer water filter pressure relief valve siphon pump automatic air vent expansion vessel 6 18 2 EXAMPLE OF A NORMAL SINGLE BOILER HEATING CIRCUIT PREFERABLE valve air separator dirt separator strainer water filter pressure relief valve siphon pump automatic air vent expansion vessel low loss header HEATING ZONE HEATING ZONE ...

Page 23: ...S CB Px 120 Manual 23 6 18 3 EXAMPLE OF A MULTIPLE BOILER HEATING CIRCUIT NON RETURN VALVE low resistance type NOT SPRING LOADED HEATING ZONE ...

Page 24: ...ic line based on the UPML 25 105PWM pump In this graph a minimum and a maximum head for the pump are depicted the pump will modulate between these two levels ΔT 20K ΔT 25K 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 0 0 1 0 2 0 3 0 4 0 5 0 Head meter WC Water flow m h High efficiency pump Resistance Boiler Max Head Pump Head for Installation Min Head Pump ...

Page 25: ...t exceed this 5 A To limit the inrush current switching sequence has been set so that pump P2 always switches 100 ms later than pump P1 The maximum nominal current of pump P2 must also be 2 A again due to inrush current Pmax 460 W 3 way valve The combined nominal current of pump P1 and the 3 way valve must be smaller than 5 A So the inrush current of the 3 way valve must be lower than 3 A Pump P3 ...

Page 26: ...boiler The air supply duct can be made of PVC PP Thin walled aluminium Stainless steel 8 2 1 COMBUSTION AIR QUALITY Combustion air must be free of contaminants For example chlorine ammonia and or alkali agents dust sand and pollen Notice that installing a boiler near a swimming pool a washing machine laundry or chemical plants does expose combustion air to these contaminants 8 2 2 AIR SUPPLY THROU...

Page 27: ...ove the roof surface Distance C The horizontal distance between the flue gas discharge pipe and air inlet pipe at roof level This distance should be at least 70 cm 8 5 B23P certified Overpressure flue gas systems For boiler classification B23P and for overpressure flue gas systems the minimum requirements of the flue gas material for Eco Boilers can be determined in a designation string according ...

Page 28: ...ues are given in the next table Resistance R Pa Ø 100 mm 130 mm 150 mm twin pipe conc 150 twin pipe twin pipe Component flue air flue air flue air straight tube m 6 5 4 0 10 1 8 1 1 0 8 0 4 45 bend 3 2 2 0 9 0 0 8 0 5 0 4 0 2 90 bend 6 5 4 0 13 1 8 1 1 0 7 0 4 roof terminal zeta 0 05 1 1 0 4 0 2 roof terminal zeta 1 0 22 1 16 7 7 8 5 8 4 4 3 3 roof terminal zeta 1 5 33 2 11 6 6 6 roof terminal con...

Page 29: ...00 mm rounded to integer meters The given max length for concentric systems is the total sum of the concentric pipe straight lengths Ø 100 150 mm rounded to integer meters Results A Maximum length air inlet flue gas outlet 22 m B Maximum length air inlet flue gas outlet 13 m C Maximum length flue gas outlet 18 m All examples separate pipes Ø 100 mm and D Maximum length concentric pipes 3 m concent...

Page 30: ...inlet is open and has not been connected so only the flue gas discharge is connected and the boiler gets its combustion air directly from the boiler room In this case The boiler room must be provided with the necessary air inlet opening s These air inlet opening s must remain open at all times and may not be reduced or closed ...

Page 31: ...king on electri cal installations and according to all applicable standards and regulations 9 2 Electrical connections An extensive explanation of the connections and their functions is given in the table in the next section 9 3 Functions of the connections 1 2 OUTDOOR SENSOR When an outside temperature sensor is connected the boiler will control the flow water temperature by using a calculated va...

Page 32: ...n tact will be closed This contact can also be used to control an external extra boiler or for the switch ing of a pump with a separate control connection In the latter two cases a parameter change is need ed 21 22 BURNER DEMAND OR PUMP ON OFF This contact is N O normally open When the unit receives any heat demand this contact will close This contact can also be used for the switching of a pump w...

Page 33: ...S CB Px 120 Manual 33 9 4 Electrical schematics ...

Page 34: ...S CB Px 120 Manual 34 ...

Page 35: ...ance Ω Temperature C Resistance Ω Temperature C Resistance Ω 30 175203 20 12488 70 1753 120 387 25 129289 25 10000 75 1481 125 339 20 96360 30 8059 80 1256 130 298 15 72502 35 6535 85 1070 135 262 10 55047 40 5330 90 915 140 232 5 42158 45 4372 95 786 145 206 0 32555 50 3605 100 677 150 183 5 25339 55 2989 105 586 155 163 10 19873 60 2490 110 508 160 145 15 15699 65 2084 115 443 165 130 Conversion...

Page 36: ...er on off Is also used as RESET button and ENTER button when programming Connector for connecting computer cable Buttons can be pushed to open menu Buttons to toggle through measured temperatures Also used for navigating through the menus and for chang ing values Button to activate service function hold for three seconds Schornsteinfeger function only for Germany Light lights when controller detec...

Page 37: ...s 2x20 digit mes sage for three seconds Message can be set in parame ters example Company name City Country press Display shows for three seconds Heater type Time date and day example Z FG 550 13 51 US or EU 06 01 2010 Wed After this message the display shows for three seconds Software version and Cascade designation example Firmware Mk 00197 Address 0 press These three messages will also show whe...

Page 38: ... The amount of degrees diff relative to Hot water set point during night reduction PROGRAM menu In this menu one can set the CH DHW and Anti Legionnella program OUTDOOR menu In this menu one can set all Outdoor relevant parameters OPERATING HISTORY menu Shows burning hours DHW Heating etc FAULT HISTORY menu press Reading last fifteen faults only reading TIME DATE DAY menu In this menu one can set ...

Page 39: ...il flow temp Sensor water temp measured temp control sens showing the measured temp Can be turned off by P5 BJ Explanation Actual status screen Actual status B o i l e r o f f When boiler is switched off only text in the display during this status N o d e m a n d No heat demand signal coming from the room thermostat and calorifier sensor open S t a n d b y Room thermostat calorifier sensor thermos...

Page 40: ...oor sensor T 6 F l u e 1 2 3 9 C Measured value by the flue gas sensor O p e n Shown when the controller does not detect this sensor S h o r t e d Shown when sensor wires or sensor itself is shorted SCREEN 4 d T F l o w R e t u r n 1 2 3 9 C Temperature difference between internal flow return d T F l u e R e t u r n 1 2 3 9 C Temperature difference between flue gas internal return SCREEN 5 Tempera...

Page 41: ...ing heat to the cascade When the leading boiler is changed according to the set priority change time then that boiler s address will be shown first in the row of numbers Example 1 3 4 5 0 1 2 There are six boilers present and nr 3 has priority Example 2 3 4 x d 1 2 There are six boilers present and nr 3 has priority Boiler 0 is heating up an indirect DHW tank Boiler 5 is present but in a lock out ...

Page 42: ...e percentage can be changed Press MENU to access the main menu Press MENU to return to the service menu Use buttons to browse through the monitor screens Press MENU to go to the operation menu of the service mode Press SERVICE to exit the service mode The unit will return to the standard operation display Maximum RPM table Strebel Px 120 RPM Max set point 6500 Max actual 6095 Margin on actual 175 ...

Page 43: ...iefly again the heater will fire at 50 firing rate In this state the display shows F l u e s e r v i c e m o d e P o w e r 5 0 When the button is pressed briefly again the heater will fire at maximum firing rate In this state the display shows F l u e s e r v i c e m o d e P o w e r M a x i m u m When the button is pressed briefly again the heater will return to the normal operation mode The Schor...

Page 44: ...C 1 2 3 4 C Program the boiler at the control panel see the following sections Terminate programming mode by pressing MENU or ENTER and NO or YES Reactivate the boiler by pressing ON OFF for three seconds again 10 8 Setting the time date The following graphs describe how to program the time and date of the unit Operating screen H E A T I N G b o i l e r o f f 1 2 3 4 C 1 2 3 4 C Press MENU Main me...

Page 45: ... Press ENTER for confirmation screen when all the changes are made Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes made unit will reset Press to confirm the changes The value set in the screen when pressing enter will be shown for a few seconds After this the display returns to the normal operating screen Heating set point normal day time H e a t i n g...

Page 46: ...er P4 AA 1 2 DHW set point reduction parameter P4 AA 1 2 D H W R e d u c e 1 0 C The reduction of the DHW set point related to normal day time set point This reduction is used outside the pro grammed DHW periods parameter P4 AA 1 2 10 10 Setting the timer programs Three different programs can be set with the boiler these are CH program DHW program Anti Legionnaires disease pasteurisation program ...

Page 47: ...alue Press ENTER for confirmation screen when all settings are done Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes made unit will reset Press to confirm the changes The last alternation will be blinking for a few seconds and return to base menu Press MENU to exit The boiler will reset and go to the operating screen Press for next SCREEN Copy programme...

Page 48: ...king for a few seconds and return to base menu Press MENU to exit The boiler will reset and go to the operating screen Press for next SCREEN Copy programmed day for DHW C o p y f r o m D H W M o n C o p y t o D H W T u e Press to switch between Copy from and Copy to The blinking day is selected and can be changed Press to change the selected blinking value Press ENTER for confirmation screen when ...

Page 49: ... base menu Press MENU to exit The boiler will reset and go to the operating screen Press for next SCREEN 10 11 Setting the outdoor specifications PARAMETERS FOR SETTING THE OUTDOOR GRAPH When using this function the flow temperature is calculated based on the measured outdoor temperature The relation between the outdoor temperature and the flow temperature can be programmed with the following pa r...

Page 50: ...P6 BC Heat curve Parallel Shift C The heating curve is set by the parameters Next to these setting done by the installer the end user has the free dom to influence the flow temperature by doing a parallel shift setting In this parameter the margins are set within which the user can increase and decrease the calculated flow temperature relative to the calculated flow tempera ture by the heating cur...

Page 51: ...rt up for heating again P6 BA CH User Setting C The set point will never be higher than the flow temperature set in parameter P6BA The maximum temperature is limited even if the calculated set temperature according to the heating curve would be higher P6 BB Heat curve night shift C The temperature reduction during the night relative to the setting determined by the heat curve P5AR Outside sensor 1...

Page 52: ...n screen after all changes are made Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes made unit will reset Press to confirm the changes made The time and day will start blinking for a few seconds After this the display returns to its operating screen 0 1 O u t s i d P r e s P5 AA 0 0 2 H C m i n O u T m p P5 AC 1 5 C 0 3 H C m i n F l T m p P5 AD 8 5 C 0...

Page 53: ... C h T o t 1 0 0 0 0 0 0 h r s D h w T o t 1 0 0 0 0 0 0 Top line Total burning hours for heating Bottom line Total burning hours for domestic hot water SCREEN 3 h r s C h 5 0 1 0 0 0 0 0 0 h r s C h 5 0 1 0 0 0 0 0 0 Top line Burning hours for heating while the burner was firing less than 50 Bottom line Burning hours for heating while the burner was firing equal or higher than 50 SCREEN 4 h r s D...

Page 54: ...e last 10 faults For each fault the display blinks between the two screens shown above The top line of the top screen shows the fault number and the bottom line of the top screen shows the date day and time the fault occurred On the top line of the bottom screen the fault type is displayed The bottom line shows the following SV The total amount of this fault that has occurred after the last time t...

Page 55: ...er for the total amount of burning hours Counter for the total amount of ignition cycles The text will blink once briefly after resetting Operating screen M a i n t e n M o d e Blinking second line What is blinking at the second line before a selection is made is the active maintenance option Press or to change the selected blinking option Screen Selecting of all maintenance options M a i n t e n ...

Page 56: ...o n f i r m Press to cancel the changes or to confirm the changes Hereafter the boiler returns to the operating screen Screen Message after total amount of ignition cycles M a i n t e n M o d e I g n i t i o n c y c l e s Press to set The total amount of ignition cycles for the Maintenance message Press to Return to maintenance mode selection The blinking value can be changed with Press ENTER to c...

Page 57: ...yed M a i n t e n M o d e M a i n t e n O f f Press ENTER to confirm the changes Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes or to confirm the changes Hereafter the boiler returns to the operating screen Note The MENU button will return the display to the operating screen BE AWARE This function is standard turned off We offer this programmable func...

Page 58: ...reen H E A T I N G b o i l e r o f f 1 2 3 4 C 1 2 3 4 C Press MENU Select User lock using and press ENTER User lock screen S e t U s e r l o c k 0 0 The 0 is now blinking selected and can be changed Use to change the value 0 User lock function OFF 1 User lock function ON Press ENTER for the confirmation screen after the selection has been made Confirmation screen A r e y o u s u r e C a n c e l C...

Page 59: ...mperature C L e g i o h y s t no 7 P5CJ Legionella hold time 0 off min L e g i o h o l d no 8 P2KI CH interrupt by Legionella 0 yes 1 no L e g i o i n t r no 9 P2LC Regulation temperature offset DHWd C D H d s c O f f 2 yes A P2MN Proportional range DHWd modulation C D H d s c P r b 2 3 no B P2LD Regulation temperature hysteresis DHWd C D H d s c D i f 2 yes C P2MO integration time DHWd modulation...

Page 60: ...g A 2 H E s o f f 1 3 4 C CH supply temperature setting This parameter is the offset of the programmed CH temperature Menu A Heating A 3 H E s P r b 1 3 2 5 C Select the CH supply temperature control This parameter is the proportional range of the selected CH supply tempera ture Menu A Heating A 4 H E s c D i f 1 3 1 0 C Select the CH supply temperature control This parameter is the hysteresis of ...

Page 61: ...ate external time controller 0 Off 1 On Connect to 13 14 Contact closed daytime setting Contact open night time setting Menu B Hot water B 1 D H i p m p t w v 1 Hot water function of the boiler by 0 pump 1 3 way valve Menu B Hot water B 2 D H i f l o w L O 2 5 C Hot water function of the boiler This parameter is the CH supply temperature LOW level with an indirect hot water de mand Menu B Hot wate...

Page 62: ...risation function of the boiler Menu B Hot water B 8 L e g i o i n t r 0 Pasteurisation function of the boiler This parameter controls if the CH demand can be interrupted by the pasteurisation function of the boiler 0 Yes 1 No Menu B Hot water B 9 D H d s c O f f 2 4 C Function for the direct hot water boiler This parameter is de off set of the selected HW temperature of the boiler Menu B Hot wate...

Page 63: ... tank This parameter is the hysteresis of the selected HW temper ature of the calorifier tank Menu B Hot water B G D H i d e t g r a d 3 C Function for the indirect hot water supply of the boiler tank This parameter detects an an accelerated hot water de mand when a larger water amount is being used Menu C Cascade C 1 M a x C a s c U n t 1 1 Function for the cascading of the boiler s This paramete...

Page 64: ...ade C 7 C o m F l u N u m 0 Function for the cascading of the boiler s This parameter determines the number of cascaded boilers that are implemented with a common flue system Menu D General D 1 0 1 0 V c o n t r 0 Function for the external control of the boiler by using a 0 10 Volt signal Connections 15 16 0 No external control 1 Control based on temperature setting 2 Control based on power settin...

Page 65: ... General D 7 c o n f i g Function for the setting of the water pressure Up to 4 bar a sensor is used up to 6 bar a switch 0 off 1 sensor 2 switch Menu D General D 8 g a s t y p e Function to select the gas type 0 G20 G25 1 G31 2 B P According to EN437 Menu D General D 9 c o n f i g Function for setting the soft start option 0 normal start up 1 reduced fan ramp up speed I 2 reduced fan ramp up spee...

Page 66: ...tion sensor Display message F1 F l o w h i g h T e m p p u m p o n 9 9 9 5 h r s Reason Flow temperature exceeds the limit which has been set in the parameters Display message F1 R e t u r n h i g h T e m p p u m p o n 9 9 9 5 h r s Reason The maximum return temperature as set in the parameters is exceeded Display message F2 L a c k o f w a t e r p u m p o n 9 9 9 5 h r s Reason The general requir...

Page 67: ...message F13 P a r a m H a r d w f a u l t p u m p o n 9 9 9 5 h r s Reason Fault during programming of the boiler software parameters Display message F15 C l i x o n F a u l t p u m p o n 9 9 9 5 h r s Reason Rear wall thermostat clixon detects a too high temperature Display message F16 F l o w R e t u r n d t f a u l t p u m p o n 9 9 9 5 h r s Reason Temperature difference between flow and retur...

Page 68: ...ssage F l o w t e m p h i g h 9 9 9 5 h r s Reason Flow temperature has exceeded the blocking temperature which is set in the Display message R e t u r n t e m p h i g h 9 9 9 5 h r s Reason Return temperature has exceeded the blocking temperature which is set in the pa rameters but the return temperature has not exceeded the lock out value Display message T 2 T 1 h i g h 9 9 9 5 h r s Reason Temp...

Page 69: ...s activated during operation contact 7 8 10 17 3 MESSAGES The following graphs describe the messages at the boiler display Depending on the selected and activated op tions for the boiler it is possible that some messages will show up at the display of the boiler For example a maintenance message after a certain programmed date has been reached The boiler will operate independently of these message...

Page 70: ...red temperatures in the operation display of the boiler P5BJ Temperature display 1 on display D5 The measured temperature in the operation display 0 not visible 1 visible 11 1 4 WATER PRESSURE P4 AD pressure 0 off 1 sensor 2 switch display D7 When the water pressure exceeds 4 bar a pressure switch must be used instead of the sensor suitable till 4 bar With the switch pressure can go up to 6 bar In...

Page 71: ...p mode 0 normal 1 relay1 2 relay2 3 relay3 display DA Do not use the 230 Vac relay for the main power supply of the pump but directly connect the pump to an external power supply A modulating pump with PWM control the power supply is directly connected to the mains the PWM connection is connected to CN10 contacts 9 and 18 Pumps with an on off control can be switched by one of the relay connections...

Page 72: ...or S3 this sensor will be used P5 AP Proportional range single heating boiler display A3 The proportional range for controlling the flow temperature of the boiler This function is active when the unit is controlled by the internal flow sensor S1 and used for single units When controlling cascaded units with an ex ternal system sensor S3 this sensor will be used P2 MI Blocking offset System CH temp...

Page 73: ...trolled by connecting an external 0 10 Vdc signal to the boiler connections 13 14 P5 BB Analogue input Config 0 off 1 temp 2 power display D1 This parameter must be set at 1 so the supplied 0 10V dc signal will control the temperature set point Possible settings are 0 0 10V control off 1 0 10V temperature set point control active 2 0 10V burner input control active P5 AI Minimum Temperature 0 10V ...

Page 74: ...active See also the following graph for the relation between the burner input and the control signal 11 2 7 TIMER CONTACT FUNCTION This function can be activated when using an external night reduction timer for heating This timer contact can be connected to the thermostat terminals connections 13 14 P5 AB Timer Contact 1 on display A9 When this parameter is activated and The thermostat terminals a...

Page 75: ...of a 3 way valve this valve will turn to the position to supply heat to the tank coil s In case of a heat demand and hot water demand the CH pump will switch off until the hot water demand ends P4 AB DHW Pump Config 0 Pump 1 TWV display B1 Use this parameter to program whether the flow to the indirect water tank calorifier is controlled by a pump 0 Pump or a 3 way valve 1 TWV 11 3 3 TANK SENSOR A ...

Page 76: ...is that the boiler by supplying a lower flow temperature to the heat exchanger of the calorifier can stay in its condensing mode if the temperature is low enough and thus operate at a higher effi ciency level When it takes too long P5 CL to heat up the tank with this low temperature mode the flow tem perature set point will change to a higher setting to make sure that the hot water set point is re...

Page 77: ...er will switch to operate for CH demand even when there is still a DHW demand P5 CM Max runtime CH during DHW demand The programmed period for the boiler to operate for CH demand in case of a DHW demand After this period the boiler will switch to operate for DHW demand even when there is still a CH demand The standard factory setting for this function is that the hot water demand always has priori...

Page 78: ...t for the end of the heat demand before the anti Legionnaires disease function starts The standard factory setting for this function is OFF The settings of these parameters P5 CI P5 CJ and P5 CD must be programmed according to all applicable anti Legionnaires disease preventing regulations The setting of these parameters can only be done by the manufacturer supplier of the water heater or by a tec...

Page 79: ... S04 016 586 This software is used for programming but also shows all measured temperatures and cascade behaviour during operation and service fault history 11 4 1 PARAMETER SETTINGS FOR CASCADED BOILERS Before programming the cascaded boilers make sure that all boilers are connected wire with each other Use connection 15 and 16 of each boiler Remind do not alternate these connections so always co...

Page 80: ...ading of the boiler s This parameter sets the function of the boiler at a cascade alignment 0 Single Slave unit 1 Master unit Menu C Cascade C 2 B u s a d d r e s s 0 Function for the cascading of the boiler s This parameter determines the address of the boiler for the total cascading control Master 0 Slave1 1 etc When the correct parameter is set this must be confirmed at the confirmation screen ...

Page 81: ... will be switched off first see table below To distribute operating hours equally over all boilers the working sequence of the boilers will change every two hours Hour Switching ON sequence Switching OFF sequence X Master Slave 1 Slave 2 Slave 3 Slave 4 Slave 5 Slave 6 Slave 7 Slave 7 Slave 6 Slave 5 Slave 4 Slave 3 Slave 2 Slave 1 Master X 2 Slave 7 Master Slave 1 Slave 2 Slave 3 Slave 4 Slave 5 ...

Page 82: ...This to prevent oxygen entering the system through these leaks The boiler has an automatic air vent situated on top of the boiler at the roof panel This vent must be opened during the filling of the boiler and the heating system to make sure that no air oxygen is trapped in the heat ex changer of the boiler NOTICE Check that the screw cap has been loosened at least one twist Shortly after put ting...

Page 83: ...e x c h a n g a t r i s k 9 9 9 5 h r s Reason Temperature difference T2 T1 has exceeded the blocking value more than three times Set in the parameters P2 CQ P2 CV T P2 CV within t P2 CQ When this T2 T1 value exceeds the lock out setting the boiler will switch off and the following lock out code will be shown at the display Display message F16 F l o w R e t u r n d t f a u l t p u m p o n 9 9 9 5 ...

Page 84: ...missioning of the boiler and the described previous actions the boiler display will show the following graph Display message 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 Reason Boiler is active but there is no heat demand The display describes The actual operation for heating or hot water If a heat demand is activated The temperature setting The temperature measured When mounting the bottom p...

Page 85: ... boiler operates at maximum load measure the CO2 percentage at the flue gas outlet of the boiler This value should match the values given in the table below When needed adjust the gas valve setting by the adjust ing screw 2 see the drawing on last page p 84 Decrease CO2 percentage Turn screw 2 right clockwise Increase CO2 percentage Turn screw 2 left counter clock wise Now continue for the setting...

Page 86: ...o decrease the actual load of the service percentage to the minimum Display message H E A T I N G S e r v i c e 2 7 1 2 3 4 C 1 2 3 4 C Reason Boiler is activated and operates at service mode at 27 minimum When the boiler operates at minimum load measure the CO2 percentage at the flue gas outlet of the boiler This value should match the values given in the table above When needed adjust the gas va...

Page 87: ...ane mixtures If the measured pressure is not within this range check the complete gas air unit consisting of the gas valve venturi fan and burner plate for defects and or mounting errors Also make sure that the measuring devices both CO2 meter and manometer are functioning well NOTICE After the setting has been done at minimum load go back to maximum load and check if it still gives the right CO2 ...

Page 88: ...6 O2 min output 3 5 7 5 7 6 2 6 5 1 measured without boiler door 2 A butane propane B P kit is needed see accessories list page 13 Butane or propane or B P mixtures may only be used with an air restrictor and with the venturi directly mounted on the fan See the instructions for butane propane kit below 3 Set the gas valve until measured CO2 values match table within 0 1 O2 values within 0 2 Instru...

Page 89: ...al and so are both recirculation protection if applic able and frost protection NOTICE Pump 3 CH pump is switched OFF but this is NOT the case when the boiler is in a cascade To reactivate the boiler switch on the burner by pressing ON OFF for six seconds again The frost protection module can still activate the burner To prevent this switch off this protection or put the boiler in power off mode 1...

Page 90: ...ety device component that generates the fault LOCK OUT CODES Having a lockout means that the boiler needs a manual reset to start operating again When the boiler is in lockout the backlight of the display is blinking on and off Explanation 9 9 9 5 h r s time elapsed after fault message Explanation P u m p 1 o n status of the pump during fault Display message F0 F l o w s e n s o r e r r o r p u m ...

Page 91: ...e is no medium water present to transfer heat from combustion to the sensor The lack of water can cause this fault when the unit is firing Corrective action Make sure there is water present in the unit before firing Display message F3 R e t u r n s e n s o r e r r o r p u m p o n 9 9 9 5 h r s Reason Return sensor is not detected by the boiler PCB Cause Bad wiring connection in the return sensor c...

Page 92: ...l air from the unit so the heat from combustion can be transferred to the water and won t leave through the flue system Cause Heat exchanger failure Corrective action This is an unlikely situation but when there is severe damage to the heat exchanger the combustion product will not be able to transfer all heat to the system water The heat that is not transferred will convert to an increased flue g...

Page 93: ...k power supply Voltage must be 230 Vac nom Check the state of the sparkplug cap and replace it if necessary Display message F9 F l a m e l o s t p u m p o n 9 9 9 5 h r s Reason Flame signal lost during operation Cause Bad gas supply pressure Corrective action Be aware that the specified gas pressure must be met during all operation conditions Check if all gas valves in the supply line are complet...

Page 94: ...e action Check the ignition ionisation electrode and make sure it is clean or replace it Check the power supply voltage for a correct polarity Check the power supply for bad frequency or voltage peaks Check external wiring for voltage feedback Check the internal wiring for bad connections Check if the gas valve is closing correctly Replace the burner control Display message F11 F a n s p e e d i n...

Page 95: ...heck that the flue is not blocked If heat exchanger is clean reset manually the clixon itself and reset the boiler Display message F16 F l o w R e t u r n d t f a u l t p u m p o n 9 9 9 5 h r s Reason Temperature difference between flow and return exceeds limi tation value or Heatexchang at Risk has occurred 3 times Cause The water flow through the unit is too low Corrective Action Check function...

Page 96: ...ing temperature but it has not exceeded the lock out value Cause Systems that pre heats the boiler return temperature too much high Corrective action Reduce pre heat temperature of external heat source Cause The need for heat in the system suddenly drops causing hot return water to the boiler Corrective action Dampen external heating system control to prevent sudden boiler temperature rise Display...

Page 97: ...tart of heat demand Immediately opening and closing of the external thermostat Check switching differential of the ON OFF thermostat Controller settings need to be changed Be aware that the standard settings work fine for all common systems When anti cycling is active because of immediate heating or cool ing of the controlled water flow temperature it concerns an unconventional system Display mess...

Page 98: ...at might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Make sure the heat exchanger is clean Heat exchanger fouling partly blockage will increase the resistance causing the water flow to drop Display message G e n B l o c k 9 9 9 5 h r s Reason General b...

Page 99: ...vice to remove this message Display message N e e d s M a i n t e n a n 0 0 I g n i t i o n c y c l e s h r s Reason Maintenance option of total amount of ignition cycles has been reached Display message N e e d s M a i n t e n a n 0 0 D a t e h r s Reason Maintenance option of the date has been reached Display message N e e d s M a i n t e n a n 0 0 B u r n i n g h o u r s h r s Reason Maintenanc...

Page 100: ... procedures If there is doubt whether the boiler is operating with the correct water and or combustion air quality it is advised that a first check is already executed after six months This check serves to determine the frequency of the future services The maximum interval between two services is a year INSPECTION AND MAINTENANCE MUST BE EXECUTED FOR A SAFE AND EFFICIENT OPERA TION OF THE BOILER 1...

Page 101: ...e whole unit clockwise until the black fan motor cover touches the foam on the inside of the left side panel Gently press the black fan cover in the foam creating just enough clearance for the bottom of the fan housing to slide just over the connection terminals If this clearance is ensured one can pull the whole burner door assembly outwards and thereby remove it from the boiler NOTICE To make re...

Page 102: ...ed the rear wall insulation should also be re placed Only use the insulation disk that is supplied by the boiler manufacturer The same procedure must be applied on the insulation and gaskets fitted on the burner door Siphon The siphon must be checked at least once a year Disassemble the siphon and clean every part of it Check the functioning of the siphon by filling it with water Then blow into th...

Page 103: ...ny signs of damage or ageing are present these parts must be replaced The burner door unit must be reassembled to the heat exchanger just in the reverse way of its disassembling as described earlier in this section on page 100 Carry out the final mounting of the burner door by follow ing the next steps Place the burner door with its holes over the six threa ded studs Careful When handling too roug...

Page 104: ...ating room unit with timer 13 14 E04 016 355 No parameter change needed A boiler heating zone System type 2 System 2 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 Place bridge 13 14 OS Outside temperature sensor 1 2 E04 016 585 No parameter change required A boiler heating zone System type 3 System 3 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump...

Page 105: ... P1 Boiler pump P3 Optional heating pump 25 26 27 RT Modulating room unit with timer 13 14 E04 016 355 T Calorifier tank ST Calorifier thermostat or tank sensor 5 6 E04 016 303 P2 DHW primary pump 29 30 31 OS Outside temperature sensor 1 2 E04 016 585 SNV Non return valve Parameter change required A boiler heating zone System type 6 System 6 Name Wire terminal Order nr P1 Boiler pump P3 Optional h...

Page 106: ...9 30 31 OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A boiler heating zone System type 8 System 8 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 RT Modulating room unit with timer 13 14 E04 016 355 T Calorifier P2 DHW primary pump 29 30 31 ST Calorifier thermostat or tank sensor 5 6 E04 016 303 OH Low loss header FS Flow temperature sensor 3...

Page 107: ...room unit with timer 13 14 E04 016 355 P2 DHW primary pump 29 30 31 T Calorifier tank ST Calorifier thermostat or tank sensor 5 6 E04 016 303 OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 SNV Non return valve low resistance type OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A boiler heating zone ...

Page 108: ... 25 26 27 RT Modulating room unit with timer 13 14 E04 016 355 SNV Non return valve low resistance type OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A B1 B2 B3 boiler master boiler slave1 boiler slave2 boiler slave3 heating zone ...

Page 109: ...4 E04 016 355 SNV Non return valve low resistance type P2 DHW primary pump 29 30 31 T Calorifier tank ST Calorifier thermostat or sensor 5 6 E04 016 303 OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A B1 B2 B3 boiler master boiler slave1 boiler slave2 boiler slave3 heating zone ...

Page 110: ...S CB Px 120 Manual 110 20 S CB Px 120 SPARE PARTS 20 1 Spare parts exploded view Numbers in the drawing correspond to the parts list on page 112 ...

Page 111: ...S CB Px 120 Manual 111 ...

Page 112: ... Burner gas air inlet pipe 12 E06 021 001 Screw M5x14 13 S03 000 164 Gas air mixing pipe S CB Px 120 14 E07 001 049 Gasket gas air inlet pipe fan 58mm 15 E04 016 132 Fan RG 148 16 E05 001 234 Distance ring venturi 17 S04 000 392 Venturi Assy S CB Px 120 18 S04 000 393 Gasvalve assy B J coils 19 S07 002 018 O ring 33x2 NBR 20 S04 000 213 Insulation burnerroom 16 mm 21 S04 016 582 Fuse 5 at 10 pcs 2...

Page 113: ...valve 41 E07 001 081 Silicon gasket 100 120 Evo399 42 S07 004 030 Seal ring 3 43 E01 004 157 Wall bracket 44 E04 015 008 Automatic air vent 45 E04 010 033 Tube gland Ø38 mm 46 Rear wall high temp Limit switch Consult factory for replacement 47 E04 010 143 Hoseclamp DW 13 48 E04 007 131 PVC hose Ø 21 x 15 L 340 mm 49 E07 003 102 Gasket siphon bottom plate 50 E05 000 146 Condensate drain assembly 51...

Page 114: ...resis 72 ignition 100 indirect hot water calorifier 75 inspection maintenance 100 installation examples 22 104 ff installation of the QP 120 14 installing a strainer and or dirt separator 19 introduction 9 legionnaires disease 46 78 low loss header 18 22 82 low high flow temperature to tank coil 76 low water level protection 14 maintenance 100 master 9 49 max cooling time 70 modulation 13 104 ff m...

Page 115: ...S CB Px 120 Manual 115 weather dependent control 49 73 ...

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Page 118: ...amberley Surrey GU16 7PB T 01276 685422 F 01276 685405 E info strebel co uk I www strebel co uk Further information on our complete product range is available from our website CAST IRON CONDENSING STEEL SHELL WATER HEATERS RENEWABLES FLUES ACCESSORIES RADIATORS ...

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Strebel S-CB Px 120, Installation Operating & Maintenance Manual

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