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Alpha Alpha CB24, Installation And Servicing Instructions, Page: 5 / 36

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Alpha Alpha CB24 Installation And Servicing Instructions Download Page 5

5

2.10 BOILER SCHEMATIC

Alpha CB24/28 - Technical Data

1

-

Seasonality valve (N/A to 24X/28X)

1

-

Flow regulator (24X/28X)

2

-

DHW switch

3

-

Diverter valve and DHW flow valve

4

-

Gas valve

5

-

Primary temperature sensor

6

-

DHW heat exchanger

7

-

Main burner

8

-

Primary heat exchanger

9

-

Room sealed chamber

10

-

Fan

11

-

Air pressure switch

12

-

Flue hood

13

-

Overheat thermostat

14

-

Expansion vessel

Fig. 2

15

-

Automatic air vent

16

-

Pump

17

-

Drain point

18

-

Pressure relief valve

19

-

Primary pressure switch

20

-

Ignition electrodes

21

-

Flame sensing electrode

22

-

DHW temperature sensor (N/A to 24X/28X)

23

-

Flue sampling point

24

-

Gas service cock

25

-

Mains inlet on/off valve

26

-

On/off valve (2 off)

27

-

Automatic by-pass (N/A to 24X/28X)

28

-

Cyclone separator (N/A to 24X/28X)

Summary of Contents for Alpha CB24

Page 1: ...epicar House London Road Wrotham Heath Sevenoaks Kent TN15 7RS For Technical help or for Service call ALPHA HELPLINE Tel 0870 3001 964 Alpha CB24X G C No 47 532 14 Alpha CB24 G C No 47 532 15 Alpha CB...

Page 2: ...are installed by a competent person ie CORGI registered personnel in accordance with the following recommendations Current Gas Safety Installation and Use Regulations All current Building Regulations...

Page 3: ...C Rise L min G P M Room sealed chamber panel fitted MAX 34 0 116 000 28 0 95 500 11 7 4 68 3 25 114 8 11 4 2 5 MIN 14 3 48 800 11 2 38 200 2 5 1 0 1 37 48 38 Domestic Hot Water Heat Input kW Gross Btu...

Page 4: ...Vertical Flue terminal assembly is equivalent to 1 m of flue length 2 8 AVAILABLE PUMP HEAD FOR CENTRAL HEATING gal min 3 7 2 8 2 3 1 8 1 5 Btu h 79 500 60 000 50 000 40 000 31 700 kW 23 3 17 58 14 65...

Page 5: ...Room sealed chamber 10 Fan 11 Air pressure switch 12 Flue hood 13 Overheat thermostat 14 Expansion vessel Fig 2 15 Automatic air vent 16 Pump 17 Drain point 18 Pressure relief valve 19 Primary pressur...

Page 6: ...tment The minimum clearances for servicing must always be maintained Note A cupboard or compartment used to enclose the boiler must be designed and constructed specifically for the purpose i e comply...

Page 7: ...L FLUE OPTIONS Lmax 4 metres L B C E 185 mm Alpha CB24 28 General Boiler Information L B C 185 mm C B E C B E B F B C L B E F 185 mm 90 bend 1 metre L B C 185 mm 2 x 45 bends 1 metre Fig 3 VERTICAL FL...

Page 8: ...e have access the terminal must be protected by a terminal guard A suitable guard is available from Tower Flue Components Ltd Vale Rise Tonbridge Kent TN9 1TB 3 6 BOILER LOCATION The boiler is not sui...

Page 9: ...essure cold should be set to 1 0 bar This pressure is equivalent to a static head see Fig 5 of 10 2 metres of water Provision should be made to replace water lost from the system This can be by manual...

Page 10: ...t operation If the pressure is above 7 bar a pressure reducing valve must be fitted To ensure economic use the pipe runs between the boiler and taps should be in 15 mm copper pipe and be as short as p...

Page 11: ...B24 28 Installation Fig 10 Fig 9 4 4 FIT THE BOILER Refer to Fig 10 1 Lift the boiler and locate it on the mounting bracket 2 Fit the bottom screws to secure the boiler in position 4 5 CONNECT THE PIP...

Page 12: ...e 6 Cut both the inner and outer ducts to length Note Do not cut the outer duct end with the two holes these are for securing the terminal Ensure that all cuts are square and burr free 7 Fit the flue...

Page 13: ...ing it tight against the wall If fitting the collar externally ensure it does not restrict any of the openings of the flue terminal 4 7 FIT A FLUE EXTENSION Figs 12 13 Note 1 The maximum flue assembly...

Page 14: ...erminal block cover and remove the link between terminals 1 and 2 Pass the cable through the cable clamp and connect it to terminals 1 and 2 Replace the terminal block cover Refer to section 2 9 4 Rep...

Page 15: ...the exposed spindle about half a turn then replace the cap 6 Check the operation of the pressure relief valve see Fig 2 by turning the head anti clockwise until it clicks The click is the valve liftin...

Page 16: ...theselectorswitchto DHWonly andfullyopenahotwatertap 2 The burner will light at the ignition rate and the burner pressure will increase to maximum 3 Gradually close the hot tap and check that the burn...

Page 17: ...en set to it will operate in the Domestic Hot Water and Central Heating mode Note The clock if fitted only controls the operating times of the central heating not domestic hot water DHW is available c...

Page 18: ...e frequency of servicing will depend upon the particular installation conditions and usage but in general once per year should be adequate It is the law that any service work must be carried out by a...

Page 19: ...the bottom of the inner case 5 Unscrew and replace any injector that appears damaged 6 Clean the top of the burner with a soft brush and check that the flame ports are clear Blockages may be removed...

Page 20: ...ng circuit Close the central heating flow and return valves see Fig 11 Connect a suitable pipe to the drain point see Fig 2 and route it to a suitable container Open the drain point 2 Hot water circui...

Page 21: ...t the boiler as described in Routine Servicing section 7 4 paragraphs 5 to 9 8 8 AIR PRESSURE SWITCH Fig 20 1 Gain access to the combustion chamber as in section 8 1 2 Disconnect the pressure sensing...

Page 22: ...ly push the valve towards the rear of the boiler take care not to damage the manifold sealing washer and lift out the valve assembly 7 Fit the new assembly and re assemble in reverse order 8 Light the...

Page 23: ...rear of the control panel 3 Disconnect the wiring from the clock 4 Remove the clock retaining screws and withdraw the clock from the control panel 5 Fit the new clock and connect the wires as follows...

Page 24: ...heating circuit for primary sensor or hot water circuit for DHW sensor as described in section 8 2 2 Primary Sensor The primary sensor is positioned on the right hand side of the heat exchanger see F...

Page 25: ...Gain access behind the casing and drain the boiler heating circuit as described in sections 8 1 and 8 2 2 Remove the four screws securing the bottom tray and remove the tray Disconnect the pressure re...

Page 26: ...e tightening the fixing screws 4 Re assemble in reverse order 8 28 EXPANSION VESSEL Note If there is less than 450 mm clearance above the boiler or a rear exit flue is used it is not possible to repla...

Page 27: ...27 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CB24 28 Wiring Diagrams 9 WIRING DIAGRAMS...

Page 28: ...28 Alpha CB24 28 Wiring Diagrams 9 2 FUNCTIONAL FLOW WIRING DIAGRAM...

Page 29: ...ontinuity Resistance to Earth Short Circuit and Polarity with a suitable meter Note These checks must be repeated after any servicing or fault finding 3 Ensure all external controls are calling for he...

Page 30: ...30 Alpha CB24 28 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence...

Page 31: ...31 Alpha CB24 28 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F...

Page 32: ...32 Alpha CB24 28 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L...

Page 33: ...r insulation panel set CB24 CB24X Combustion chamber insulation panel set CB28 CB28X Description British Gas GC No E57 720 E57 732 E57 733 E57 733 E57 736 E57 737 E57 739 E57 741 E57 665 E57 666 E76 3...

Page 34: ...TAILS OF BOILER INSTALLATION Date of Installation Name of Installer Address Postcode Telephone No Boiler Serial Number see data label on inside of left hand case panel DETAILS OF BOILER SERVICE HISTOR...

Page 35: ...35 Alpha CB24 28...

Page 36: ...92 These instructions have been carefully prepared but we reserve the right to alter the specification at any time in the interest of product improvement Alpha Therm Limited 2003 Alpha Therm Limited N...

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