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9/14CBi, 14/19CBi, 19/24CBi
WALL MOUNTED BOILERS FOR CENTRAL HEATING
AND INDIRECT SUPPLY OF DOMESTIC HOT WATER
INSTALLATION AND
SERVICING INSTRUCTIONS
Worcester supports the
Benchmark code of practice
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 (LP
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Contents 10. Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10 1. Installation Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 11. Installing the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 12. Commissioning the Appliance . . . . . . . . . . . . . . . . . . . . Page 23 3. Technical Data . . . . . . . .
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working at a gauge pressure of at least 0.35bar above the relief Fig. 1. Water flow diagram. valve setting if on a sealed system. Where a storage system will not have a vent to atmosphere the Pipes installation must comply with Building Regulations and Water Return Flow Company bye-laws. If connecting to an existing system the local authority should be informed. 2.7 Flue There are 3 fluing options available. (i) Rear Only Flue Kit. Flue can be fitted within the height of the casing from 220mm t
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3. Technical Data The data plate is fixed to the inner casing cover. Table 1. Factory set at maximum input NOMINAL BOILER RATINGS (10 Minutes After Lighting) APPLIANCE BURNER OUTPUT INPUT (Net) GAS RATE PRESSURE 3 kW kW m bar. m /h 14.00 15.28 11.0 1.62 9/14CBi NG 11.50 12.70 7.3 1.41 9.00 10.11 4.5 1.07 14/19CBi NG 19.05 20.57 11.5 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 19/24CBi NG 21.25 23.35 9.8 2.47 19.05 21.16 7.8 2.24 9/14CBi LPG 14.00 15.28 27.2 0.63 12.00 13
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Table 4 MECHANICAL SPECIFICATIONS FLOW - COPPER TAILS 22mm RETURN - COPPER TAILS 22mm GAS INLET 15mm COMPRESSION CASING HEIGHT 600mm CASING WIDTH 390mm CASING DEP
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4. Siting The Appliance Fig. 3. Appliance pipework connections The appliance may be installed in any room subject to the 165mm requirements of the current IEE regulations and, in Scotland, the FLOW relevant electrical provisions of the Building Regulations with RETURN respect to the installation of appliances in rooms containing baths or showers. If the appliance is installed in a room containing a bath or shower, any switch or appliance control using mains electricity must NOT be able to be tou
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5. Flue terminal positions 6. Air Supply The flue system must be installed following the requirements of A separate vent for combustion air is not required. BS5440:1. The appliance can be fitted in a cupboard or compartment with The standard flue kit length is 425 - 725mm. Extension kits for no vents for cooling, but the minimum clearances must be flues up to 3.0m are available. increased to those given below. Refer to BS6798. A rear flue suitable for walls from 220 - 375mm thick is available No
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7. System 8. Domestic Hot Water The system must comply with requirements of BS6798 and The appliance is NOT suitable for direct water supply. BS5449. Do not connect to a direct cylinder. General: The CBi can be connected to any indirect cylinder, i.e unvented or The appliance is only suitable for connection to indirect fully thermal store, and all the benefits of a "dry loft" and mains pumped sealed and open vent systems. The minimum static pressure hot water can be realised. Contact The Worcest
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For system wiring please refer to Fig. 6. System layout if using Honeywell 'S' plan Fig. 10. and the controls manufacturers details. Feed and Vent Cistern S.H. – Minimum static head 1.2m measured from the highest point in the heating system (top surface of the appliance S.H. or highest point in the heating system) to the Primary water level in the feed and expansion tank S.H. cold feed Domestic hot (15mm min.) water cylinder Heating vent (22mm min.) Diverting N.B. A drain cock should be valv
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10. Electrical 9. Gas Supply The gas supplier must be contacted to check the suitability of Mains Supply: 230V, 50 Hz, 125 watts. the appliance for the local gas supply conditions before External Fuse: 5A (must be to BS1362). connecting the appliance. Internal Fuse: F1 4A (Spare supplied with appliance). 3 The 19/24CBi appliance requires a maximum of 2.72 m /h of IP Rating: IP 20. 3 natural gas (G20), 1.05 m /h propane (G31). The appliance must be earthed and it must be possible to 3 The 14/19C
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Fig.10. Boiler wiring diagram Polarity of these connections is not Fan * important. Air pressure switch * white NC grey NO brown COM Overheat Thermostat orange black * Spark Flame Electrode Sense Temperature Electrode sensor * Gas Valve X4 1 1 X5 X6 X3 X7 1 Control Board blue X2 brown earth Pump Live Pump Neutral Installer X1 Connections Permanent Neutral User control Permanent Live potentiometer/switch Switched Live (Boiler Demand) 3 pin header 11 violet red orange black white brown grey vi
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Fig.11 . System wiring diagram System components wired into terminal strip in accordance with component manufacturers instructions System wiring centre Boiler/pump demand from L switched Terminal strip system wiring centre Pump not to be connected to system wiring centre 230V 50Hz (5A Fuse) E Common isolator N for wiring centre Pump and boiler L (supplied from boiler only) Should be located adjacent to the boiler OUTSIDE OF BOILER INSIDE OF BOILER Cable clamp Control Board Pump L Pump N P
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Fig. 12a. Boiler Assembly 9/14CBi Shown set for Rear Only flue kit 26 18 17 20 19 21 16 22 1 15 2 14 3 13 25 4 12 11 5 24 6 23 9 10 7 8 1. Inner case 14. Overheat thermostat 2. J bolts and wing nuts (2) 15. Air pressure switch 3. Combustion chamber cover 16. Flow pipe 4. Burner 17. Return pipe 5. Burner fixing screw 18. Combustion test point 6. Control knob 19. Sensing tubes 7. Indicator lights 20. Fan 8. Base/controls fixing screw 21. Flue hood 9. Cabinet f
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Fig. 12b. Boiler Assembly 14/19 and 19/24CBi Shown set for horizontal flue or vertical flue 17 18 20 21 19 16 22 23 15 1 2 14 3 13 27 26 4 12 11 5 25 6 24 10 8 7 9 1. Inner case 15. Air pressure switch 2. J bolts and wing nuts (2) 16. Flow pipe 3. Combustion chamber cover 17. Return pipe 4. Burner 18. Combustion test point 5. Burner fixing screw 19. Sensing tubes 6. Control knob 20. Fan 7. Indicator lights 21. Fan clamp (2 screws) 8. Base/controls
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Fig. 13b . Flue and wall plate 11. Installing The Appliance NOTE: READ THIS SECTION FULLY BEFORE COMMENCING THE INSTALLATION To install a boiler with a rear only flue refer to Section 11.1. To install a boiler with a telescopic horizontal flue kit refer to Section 11.2. To install a boiler with a vertical flue refer to Section 11.2. and the literature with the flue kit. 11. Installation of the Boiler with a Rear Only Flue Kit Flue fixing position 11.1 Unpacking the Boiler Ch
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Fig. 14a . Rear only flue assembly 3 L + 5 6 Tape 2 4 1 5 1. Telescopic flue assembly 2. Terminal assembly 3. Flange / flue assembly 4. Indents 5. Wall mounting plate 6. Flue tube with fixing bar 11.1.6 Install the Boiler Fig. 14b . Rear of casing IMPORTANT: Thoroughly flush the system before connecting the boiler. Any system cleanser must be flushed from the system before adding any inhibitor. (i) Lift the boiler onto the wall mounting plate. See Fig. 15. (ii) Level the boile
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Fig. 15 . Fixing the appliance to the wall mounting plate. 2 6 5 8 1 7 1. Telescopic flue assembly 2. Wall mounting plate 3 3. Fixing or security screw 4. Levelling feet (2) 5. Restrictor plate with rectangular hole 6. Gasket 7. Flue fixing screws 8. Flue tube with fixing bar 4 Fig. 16 . Fan/Flue hood Assembly with Rear Only Flue Kit 5 NOTE: The polarity of wires is not important 6 11 9 —ve 1 10 1. Flue hood 2. Fan +ve 3. Sensing connection (+) + 4. Sensing co
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152mm 11.1.8 Completion of the Installation Fig.17 . Mains electricity and controls connections. Check that all the gas and water connections have been tightened. 10 11 12 13 Lower the base plate/control panel. Refer to Fig. 17. The permanent mains and switched live supply to the boiler 9 14 must come from the system junction box. Refer to Fig.11. A 4 core cable is recommended. 1 Feed the 4 core cable and the pump cables through the bracket and secure in the cable clamp. Refer to Fig. 17. Fi
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(iii) The method of installation of the flue system may be Fig.19. Flue turret fixing and combustion varied to suit the actual site conditions. The instructions sensing point for connecting and fixing the ducts must, however, be 1 strictly followed. 1 Remove all packing material from the flue components. 7 2 The standard telescopic flue assembly is suitable for lengths 1. Flue spigot fixing screws 8 from 425mm up to 725mm measured from the centre-line of the 2. Flue spigot boiler flue
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11.2.6 Telescopic Horizontal Flue Kit up to 11.2.8 Flue Bends 750mm in Length 90° and 45° directional bends are available. A maximum of two 45° or 90° bends may be used in addition to the first bend on (i) The standard flue can be telescopically adjusted to any the flue turret. length between 425mm and 725mm. A 90° bend is equivalent to 750mm of straight duct. It will only be necessary to cut the standard assembly if A 45° bend is equivalent to 375mm of straight duct. L<425mm
