manualshive.com logo in svg

Worcester 14/19CBi, Installation And Servicing Instructions

Share
Download
Worcester 14/19CBi Installation And Servicing Instructions Download Page 25

Burner  Blade  Assembly

.  Remove  the  combustion  chamber

cover.  Undo  the  screw  at  the  right  hand  end  of  the  burner.
Carefully pull-off the connections to the spark electrode. Slide the
burner blade assembly off the injector and remove. Carefully pull
off the flame sense electrode lead. Refer to Fig 33/33a.

Control  Board  Cover. 

To  gain  accress  to  the  control  board

remove  cover  from  the  front  clip,  with  a  screwdriver  (if
necessary) and unclip from the rear of the controls tray.

14.4 Component Cleaning

Do not use a brush with metal bristles to clean components.
Clean the fan taking care not to block air flow detector.
Clean the burner to ensure that the blades are clear. Do not use a
metal probe to clean the injector.
Clean the electrodes and check the alignment. Replace if there is
any sign of deterioration. 

Clean the heat exchanger from top and bottom after covering the
burner injector. To clean the heat exchanger flueways remove the
stainless  steel  baffles  from  the  appliance  -  the  rear  combustion
chamber cover can be tilted for better access. The front and rear
flueways can be cleaned with a brush being careful to protect the
rear  combution  chamber  insulation.  The  inner  flueway  can  be
cleaned with a scraper. 
Check the combustion chamber insulation and replace if there is
any  sign  of  damage  or  deterioration.  Refer  to  Section  15.4.11.
Carefully  refit  any  components  removed  and  check  that  all
screws are tight and the connections properly re-made with the
appropriate gaskets/O-rings/seals.
Re-commission,  as  necessary,  for  correct  operation  to  the  users
requirements. Refer to Section 12 Commissioning.

Fig. 33a.  Inner Casing and control

9/14CBi

25

1.    Inner case

8.    Base/controls fixing screw

2.    J bolts and wing nuts (2)

9.    Cabinet fixing screw

3.    Combustion chamber cover   

10.  Gas valve

4.    Burner

11.  Spark electrode

5.    Burner fixing screw

12.  Burner injector

6.    Control knob

13.  Temperature sensor

7.    Indicator lights

14.  Overheat thermostat

15.  Air pressure switch

22.  Inner case cover fixing points (4)

16.  Flow pipe 

23.  Outer case earth tag

17.  Return pipe 

24.  Side cover plate

18.  Combustion test point

25.  Wire clip

19.  Sensing tubes

26.  9/14CBi clamping bracket

20.  Fan

27.  Pressure tube junction

21.  Flue hood

1

2

22

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

21

20

23

24

26

25

27

Summary of Contents for 14/19CBi

Page 1: ...PPLY OF DOMESTIC HOT WATER INSTALLATION AND SERVICING INSTRUCTIONS This appliance is for use with Natural Gas or LPG Cat II 2H3P 9 14CBi GC NUMBER 41 311 50 N G 9 14CBi GC NUMBER 41 311 51 LPG 14 19CBi GC NUMBER 41 311 52 N G 14 19CBi GC NUMBER 41 311 53 LPG 19 24CBi GC NUMBER 41 311 54 N G 19 24CBi GC NUMBER 41 311 55 LPG APPLIANCE OUTPUTS IMPORTANT THESE INSTRUCTIONS APPLY IN THE UK ONLY AND MUS...

Page 2: ...he or she must call back the installer who has not fulfilled his obligations to record the information required by the initiative 2 1 General Information The Worcester boilers provide a heat output of between 9 14kW 9 14CBi 14 19kW 14 19CBi 19 24kW 19 24 CBi factory set at mid range and contain a temperature control and all the appropriate safety controls They are suitable for fully pumped open ve...

Page 3: ...nue to run for up to 4 minutes and the fan for 1 minute to dissipate the residual heat Domestic Hot Water The supply of domestic hot water depends upon the type of hot water equipment installed and the control system The use of unvented cylinders must be in accordance with the manufacturers instructions and relevant to British Standards The boiler is despatched from the factory with the flow and r...

Page 4: ...5 2 18 16 52 17 96 8 5 1 90 14 00 15 38 6 0 1 63 23 45 25 74 12 0 2 72 21 25 23 35 9 8 2 47 19 05 21 16 7 8 2 24 14 00 15 28 27 2 0 63 12 00 13 18 20 4 0 54 10 00 11 17 15 4 0 45 19 05 20 57 25 4 0 84 16 52 17 96 19 0 0 73 14 00 15 38 13 9 0 63 23 45 25 74 29 9 1 05 21 25 23 35 24 6 0 96 19 05 21 16 20 2 0 87 Table 1 Factory set at maximum input BURNER PRESSURE Natural Gas Net Input Gross Input x ...

Page 5: ...RE Sealed System 2 5 bar MINIMUM CENTRAL HEATING SYSTEM SET PRESSURE Sealed System 0 12 bar OUTPUT TO CENTRAL HEATING 9 14CBi 9 0 14 0kw 14 19CBi 14 0 19 05kw 19 24CBi 19 05 23 45kw NOx CLASSIFICATION FOR CBi APPLIANCES Class 1 SEDBUK NUMBER AND BAND 9 14CBi NG 78 5 D 14 19CBi NG 79 4 D 19 24CBi NG 78 4 D 9 14CBi LPG 81 0 D 14 19CBi LPG 81 7 D 19 24CBi LPG 80 8 D Table 5 Improved access 50mm is re...

Page 6: ...und on the opposite side The appliance is NOT suitable for external installation The wall must be able to support the weight of the appliance Refer to Table 4 The specified clearances must be available for installation and servicing Refer to Table 7 and Fig 2 The appliance can be installed in a cupboard compartment to be used for airing clothes providing that the requirements of BS6798 and BS5440 ...

Page 7: ... stated in the table above minimum clearances are given in Section 4 Siting the Appliance then permanent air vents for cooling are required one at high level and one at low level Both high and low level vents must communicate with the same room or must be on the same wall to outside air The minimum requirements are 6 Air Supply 5 Flue terminal positions 7 L L K K F F G A M E J F HI D G A B C Fig 4...

Page 8: ...d filling kit Refer to Fig 8 The appliance must not be operated without the system being full of water and correctly pressurised All connections in the system must withstand a pressure of up to 3 bar The system and the appliance must be properly vented Repeated venting loses water from the system and usually indicates that there is a leak It is NOT suitable for direct water supply Do not connect t...

Page 9: ...ion Vessel For system wiring please refer to Fig 10 and the controls manufacturers details Bypass balancing valve or bathroom radiatior with two lockshield valves Pressure Gauge Relief Valve Fig 8 Sealed system filling and make up Primary cold feed 15mm min Heating vent 22mm min Feed and Vent Cistern Diverting valves Boiler Pump Radiator S H Minimum static head 1 2m measured from the highest point...

Page 10: ...entre must be through a common fused double pole isolator situated adjacent to the appliance The isolator must have a contact separation of 3mm minimum in all poles A single switched live cable should be wired into the boiler from the system wiring centre The mains and pump cables must be fed through the mains lead bracket secured through the cable clamp and connected to the connector plug Refer t...

Page 11: ...3 X4 X5 X6 1 orange 1 1 X7 User control potentiometer switch black white brown grey violet red violet red black orange brown grey white NC NO COM Temperature sensor Pump Live Pump Neutral Permanent Neutral Permanent Live Switched Live Boiler Demand earth Installer Connections blue brown Polarity of these connections is not important 3 pin header ...

Page 12: ... wiring centre L switched Pump not to be connected to system wiring centre Pump supplied from boiler only L N E Timer Room thermostat Tank thermostat System water valves 230V 50Hz 5A Fuse System components wired into terminal strip in accordance with component manufacturers instructions Frost stat Common isolator for wiring centre and boiler Should be located adjacent to the boiler MainsEarth TOPC...

Page 13: ...screw 9 Cabinet fixing screw 10 Gas valve 11 Spark electrode 12 Burner injector 13 Temperature sensor 14 Overheat thermostat 15 Air pressure switch 16 Flow pipe 17 Return pipe 18 Combustion test point 19 Sensing tubes 20 Fan 21 Flue hood 22 Inner case cover fixing points 4 23 Outer case earth tag 24 Side cover plate 25 Wire clip 26 Pressure tube junction 1 2 22 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1...

Page 14: ...ture sensor 14 Overheat thermostat 15 Air pressure switch 16 Flow pipe 17 Return pipe 18 Combustion test point 19 Sensing tubes 20 Fan 21 Fan clamp 2 screws 22 Inner case cover fixing points 4 23 Flue hood 24 Outer case earth tag 25 Side cover plate 26 Wire clip 27 Front baffle Fig 12b Boiler Assembly 14 19 and 19 24CBi Shown set for external flue turret kit or vertical flue 1 2 23 22 3 4 5 6 7 8 ...

Page 15: ...e at 110mm diameter ii Fix the wall mounting plate do not fully tighten the screws iii Measure the wall thickness L Min 220mm Max 375mm If L is less than 220mm thick then it is necessary to cut the flue To do this subtract L from 220 and cut all flue parts by this amount Ensure that the ducts are square and free from burrs Always check dimensions before cutting The minimum length L is 100mm with c...

Page 16: ...to position so that the holes in the flange line up with those in the case NOTE The correct rectangular flue restrictor must now be fitted when the boiler is on the wall 9 14CBi and 14 19CBi 19 24CBi 66 X 62 Rectangular 77 X 62 Rectangular ii From the inside place the correct restrictor in position over the flue opening and using the screws provided fix through the inner casing into the flue syste...

Page 17: ...essure tube extension 2 3 red tube 4 clear tube 5 7 Fig 16 Fan Flue hood Assembly with Rear Only Flue Kit 6 NOTE The polarity of wires is not important 9 10 8 ve ve 11 12 Fig 15 Fixing the appliance to the wall mounting plate 1 2 6 3 4 5 7 8 1 Telescopic flue assembly 2 Wall mounting plate 3 Fixing or security screw 4 Leveling feet 2 5 Restrictor plate with rectangular hole 6 Gasket 7 Flue fixing ...

Page 18: ...ecurity bolt Drill the 5 fixing holes 60mm deep for the No 12 size plugs 11 2 4 Boiler Preparation i Remove the appliance casing by releasing the screw at the centre base Disconnect the earth connection at the base and lift off ii Release the four screws and remove the inner casing cover iii Release the two wing nuts and remove the combustion chamber front panel The cover is located into notches a...

Page 19: ...5 2 2225 3 2500 19 24CBi 3 2975 9 14 and 14 19CBi iv Measure length L Refer to Fig 20 21 22 v For installation of standard flue up to 750mm refer to Section 11 2 6 For installation of flue greater than 750mm refer to Section 11 2 7 For installation of bend kits refer to Sections above and Section 11 2 8 For installation of vertical adaptor refer to Section 11 2 9 For installation of internal fitti...

Page 20: ...bends may be used in addition to the first bend on the flue turret A 90 bend is equivalent to 750mm of straight duct A 45 bend is equivalent to 0 375m of straight duct Measure the lengths X and Y Refer to Fig 23 The maximum value of X using the turret assembly only is 506mm Reduce the ducts to the appropriate length e g X 406mm cut 100mm from the air duct and 120mm to cover the entry into the 45 o...

Page 21: ...he flue centring ring 11 2 11 Install the Boiler IMPORTANT Thoroughly flush the system before connecting the boiler Any system cleanser must be fully flushed from the system i Lift the boiler onto the wall mounting plate See Fig 27 ii Level the boiler using the two levelling feet at the base of the back panel iii Fit the bottom fixing screw or optional security screw iv Connect the gas supply usin...

Page 22: ... door 11 2 13 Completion of the Installation Check that all the gas and water connections have been tightened Lower the base plate control panel Refer to Fig 30 The permanent mains and switched live supply to the boiler must come from the system junction box Refer to Fig 11 A 4 core cable is recommended Feed the 4 core cable and the pump cables through the bracket and secure in the cable clamp Ref...

Page 23: ...mes before going to lockout To reset the product turn the control knob fully anti clockwise and back NOTE The burner pressure is factory set and may be reset to match the system requirements If after checking that the supply pressure is sufficient i e 19 mbar approx NG or 36 mbar approx PROPANE at the gas valve inlet pressure test point the required pressure cannot be obtained then contact Worcest...

Page 24: ...plies are isolated before accessing the following parts Remove some or all of the following parts to gain access to the components Outer Case Loosen the screw and clip at the base disconnect the earth tag lift the case up and pull forwards Base Control Assembly Remove the single screw and lower Refer to Fig 33a b Inner Case Door Remove the two top corner screws Loosen the two bottom corner screws ...

Page 25: ...tter access The front and rear flueways can be cleaned with a brush being careful to protect the rear combution chamber insulation The inner flueway can be cleaned with a scraper Check the combustion chamber insulation and replace if there is any sign of damage or deterioration Refer to Section 15 4 11 Carefully refit any components removed and check that all screws are tight and the connections p...

Page 26: ...might retain water 15 4 Component Replacement Replace any components removed from the appliance in the reverse order using new gaskets O rings sealant heat transfer paste where necessary Always check that any electrical connections are correctly made and that all screws are tight 15 Replacement Of Parts 26 1 Inner case 8 Base controls fixing screw 2 J bolts and wing nuts 2 9 Cabinet fixing screw 3...

Page 27: ...tat 15 Casing support 16 Return pipe 17 Flow pipe 18 Air pressure switch 19 Combustion test point 20 Air pressure switch fixing clip 4 21 Flue hood 22 Fan 23 Sensing tubes 24 Outer case earth tag 25 Side cover plate 4 5 6 7 8 7 9 8 10 14 15 11 12 14 11 16 17 18 19 20 21 22 23 Fig 35 Base Control Board Assembly 1 2 3 4 5 6 7 8 1 Base control assembly 2 Base control assembly fixing point 3 Gas valve...

Page 28: ...ata plate on the cabinet where required pressure will be indicated Alter the red arrow if a new setting is made The adjustment screw must be sealed by a dab of paint to stop unauthorized adjustment Switch off the appliance disconnect the pressure gauge and tighten the test point screw Refer to Fig 31 Check for gas soundness 15 4 2 Spark Electrode Remove the inner casing cover and the combustion ch...

Page 29: ...ections are correctly made to the new fan Refer to Fig 37 and 37a Do not use any sealant on the fan flue duct connection The polarity of wires onto the fan is not important 29 1 1 Flue hood 2 Fan 3 Sensing connection 4 Sensing connection 5 Flue turret 6 Fan clamp 7 Fan clamp fixing screw 2 3 red tube 4 clear tube 5 6 7 Fig 37 Fan Flue hood Assembly with External Flue 1 1 Flue hood 2 Fan 3 Sensing ...

Page 30: ...he position of each pressure tube carefully disconnect the tubes and electrical connections from the switch Unclip and remove the switch if there is more than 50mm clearance Refer to Fig 40 If there is minimum clearance then remove the inner casing cover and release the two screws Remove the air pressure switch and mounting bracket complete Ensure that the connections are correctly made on the rep...

Page 31: ...ly burner blade assembly and the access plate at the left hand side of the inner casing Pull off the leads from the sensor and overheat thermostats Pull off the clip to remove the sensor unscrew the overheat thermostat Pull out the clips securing the flow and return pipes and remove them from the manifolds It will be necessary to disconnect the pipes from the system adjacent to the boiler Unscrew ...

Page 32: ... cover IX Switch on the gas supply and open the gas cock at the appliance Check for leaks at the gas valve inlet X Refit the base control assembly XI Recommission the appliance Refer to Section 12 Commissioning for details Adjust the burner setting pressure as required Refer to Table 1 and Fig 31 XII Fix the Red Arrow on the data plate to show the boiler setting If the setting has been altered the...

Page 33: ...ctrode Assembly 1 87161421400 9 E60 481 Sensor Electrode Assembly 1 87161421390 10 E60 482 Spark Electrode Lead 1 87161218050 11 E60 483 Sensor Electrode Lead 1 87161421370 12 E60 484 Heat Exchanger Assembly 9 14CBi 1 87161216990 13 E60 485 Heat Exchanger Assembly 14 19 19 24CBi 1 87161217000 14 E60 486 Insulation Kit 9 14CBi 1 77161018540 15 E60 487 Insulation Kit 14 19 19 24CBi 1 77161017960 16 ...

Page 34: ...run Boiler demand light on Pump supply on Ignition sequence Boiler cycles to satisfy temperature set by facia control knob Temperature Sensor disconnected Ignition sequence inhibited fan and pump may run for short period Boiler overheat Overheat thermostat trip Lockout light constant Protection Systems re attempt ignition MAX 4 times lockout light flashing Fan continues for 1 minute FAIL PASS PASS...

Page 35: ...ystem checks are the first electrical checks to be carried out during a fault finding procedure On completion of the Service Fault finding task which has required the breaking and remaking of electrical connections check a EARTH CONTINUITY b SHORT CIRCUIT CHECK c POLARITY and d RESISTANCE TO EARTH WARNING In addition to the controls the overheat thermostat and fan are connected directly to the per...

Page 36: ...ate electrical supply from external system No Create a new demand Does the fan run Yes No Is there 230V across the fan terminals WARNING if NO both fan terminals will be LIVE Does the pump run Check fuse F1 on the control board Has it blown No No No Replace fan Yes Air pressure switch is stuck on Replace air pressure switch Yes Replace fuse and investigate cause Suggestions connections to or fault...

Page 37: ...oiler demand With the boiler cool does the pump run Yes Switch off mains supply Remove boiler cover and inspect the temperature sensor Is it correctly fitted to the manifold with heat conductive paste on its surface Yes Gain access to control board and inspect the slide switch at the front of the board In normal domestic installation this switch should be in the left normal position Yes Yes Yes Re...

Page 38: ... leads Yes Replace control board Yes During spark period is there 216V D C across the pins at connector X2 Replace gas valve or check cable to it Yes No Yes TURN OFF GAS SUPPLY Remove the combustion chamber cover Is the sense right electrode and lead in good condition and is gap correct See Section 15 4 3 No Repair or replace flame sense or cable to it Replace control board Note It is not possible...

Page 39: ...et to maximum Less than 75 C Such a fault is likely to be caused by one or more of the following Low gas pressure Partially blocked flue Partially blocked heat exchanger Blocked dirty burner Gas valve sticking Control board fault Faulty themister Replace control board Move control knob to lower setting Check thermister sensor heat conductive paste ...

Page 40: ...nterests of continued improvement All goods sold are subject to our official Conditions of Sale a copy of which may be obtained on application PUBLICATION 8 716 103 192 a 09 01 Bosch Group Worcester Heat Systems Limited Cotswold Way Warndon Worcester WR4 9SW Telephone 01905 754624 Fax 01905 754619 Technical Helpline 08705 266241 www worcester bosch co uk ...

Page 41: ...41 ...

Page 42: ...1 49 50 9 14 CBi 41 311 50 51 28Si 47 311 51 52 14 19 CBi 41 311 52 53 C1 47 311 51 19 24 CBi 41 311 54 55 24CDi 47 311 30 31 WR325 52 311 02 28CDi 47 311 34 35 WH1 52 311 03 35CDi II 47 311 51 52 IMPORTANT THIS BOOKLET MUST BE READ FULLY IN CONJUNCTION WITH THE APPLIANCE INSTALLATION AND SERVICING INSTRUCTIONS THESE INSTRUCTIONS APPLY IN THE UK ONLY THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER...

Page 43: ...able for installation in dwellings with pitched or flat roofs The minimum distance the Flue Terminal Assembly shall extend above the surface of the roof is 300mm This dimension is measured from the outside surface of a flat roof or the highest point on a pitched roof to the underside of the air inlet flange on the terminal assembly See Fig 2 Important All the Flue items referred to in this section...

Page 44: ...ength to not exceed 800mm or 1550mm for 2 x 45 bends When measuring between the centre lines of flue ducts an allowance must be made for the relevant elbow Refer to Fig 3 Equivalent Length 4m 90 bends 0 5m 2m Equivalent length 2x750mm 1 5m 75mm MODEL 15SBi 79mm NONE NONE 24SBi EQUIVALENT FLUE LENGTHS UP TO 1M EQUIVALENT FLUE LENGTHS 1M TO 4M EQUIVALENT FLUE LENGTHS UP TO 725MM EQUIVALENT FLUE LENG...

Page 45: ... top of the appliance then the flue adaptor is not required 3 5 FLUE SUPPORT Flue assembly lengths over 2000mm should be appropriately supported Refer to Fig 6 and Section 5 4 3 6 FIRE STOP SPACER The fire stop spacer is supplied with the flue kit Refer to Fig 7 and Section 5 3 3 7 ROOF FLASHING The roof flashing is not supplied This is available as a proprietary item Selkirk or similar from the b...

Page 46: ... and pitched roofs Important The terminal assembly must extend at least 300mm above the surface or pitch of the roof The distance may vary depending upon the type of roof and surrounding structures In these instructions the distance is refered to as dimension F Refer to Fig 9 10 11 12 Fig 8 Marking out the flue assembly position Vertical Flue System no offset Appliance front Appliance front Vertic...

Page 47: ...han 300mm Duct Length H 92mm Derivation Dimension G 1100 Fmm Dimension H E G Refer to 2 2 for maximum duct length 4 Measurement of Ducts Air inlet flange Weather sealing collar Secure with screw provided and seal with silicone sealant Roof flashing not supplied Flat roof Pitched roof Flue terminal assembly 106mm diameter Fire stop spacer Air and flue duct extension kits 750mm Vertical flue adaptor...

Page 48: ...iameter marked on the inside surface of the roof Dimension K Refer to Fig 7 Note Dimension K for a pitched roof must go to the highest point of the hole diameter Determine dimension F Refer to Fig 1and 7 for the limiting figure Duct Length L 81mm Derivation Dimension G 1100 Fmm Dimension L K G Note The air duct must not be less than 100mm Air inlet flange Weather sealing collar Secure with screw p...

Page 49: ...ide surface of the roof Dimension K Refer to Fig 6 and 7 Note Dimension K For a pitched roof must go to the highest point of the hole diameter Determine dimension F which must not be less than 300mm Duct Length L 81mm Dimension G 1100 F mm Dimension L K G Air inlet flange Weather sealing collar Secure with screw provided and seal with silicone sealant Roof flashing not supplied Flat roof Pitched r...

Page 50: ...uts are square and free from burrs All dimensions refer to straight lengths and do not include the expanded ends Do not cut the expanded ends unless specifically instructed to do so 5 3 POSITION OF THE FIRE STOP SPACER ASSEMBLY Fit the fire stop spacer centrally over the hole in the ceiling Ensure the hole aligns with the flue spigot on top of the appliance casing 5 Installation of Flue Mark the f...

Page 51: ...at each stage of the system assembly that each section is properly aligned Each air and flue duct joint must be sealed and fixed Each air and flue duct connection to an elbow must be sealed with silicone sealant and fixed with the screws provided Support any sections of the system until they are permanetely fixed into place using suitable support brackets 5 5 ASSEMBLY OF DUCTS 5 5 1 AIR DUCTS Chec...

Page 52: ...s in the air duct Separate the assembly and apply silicone sealant to the outside of the air duct Re connect the assembly and fix with the screws provided Note The sealant and screws are not required for the flue duct Refer to Fig 13 5 10 SEAL THE TERMINAL ASSEMBLY TO THE ROOF From outside the building make good the roof structure and ensure the roof is weather sealed by fixing the roof flashing A...

Page 53: ...interests of continued improvement All goods sold are subject to our official Conditions of Sale a copy of which may be obtained on application PUBLICATION 8 716 145 030d 08 01 Bosch Group Worcester Heat Systems Limited Cotswold Way Warndon Worcester WR4 9SW Telephone 01905 754624 Fax 01905 754619 Technical Helpline 0990 266241 www worcester bosch co uk ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands