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Alpha Alpha CB24, Инструкции по установке и обслуживанию, Страница: 6 / 36

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6

3.1

GAS SUPPLY

The Alpha CB24 and CB24X boilers require a gas rate of 2.71 m³/h (95.7 ft³/h) and the Alpha CB28 and CB28X a gas rate
of 3.25 m³/h (114.8 ft³/h).

The meter and supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other
appliances in the house. The boiler requires at least a 22 mm gas supply pipe.

The complete installation, including the meter, must be tested for gas soundness and purged as described in BS 6891.

3.2

ELECTRICAL SUPPLY

The boiler requires a 230/240 V ~ 50 Hz mains supply, fused at 3 A

The boiler must be earthed.

There must only be one common isolator, providing complete electrical isolation, for the boiler and any external controls.

This boiler has been fitted with a supply cable, however, if it is necessary to fit a cable use PVC insulated cable not less than
0.75 mm² (24 x 0.2 mm) to BS 6500 Table 16. The boiler should be connected to a fused three pin plug and unswitched
shuttered socket outlet (both complying with BS 1363), or a fused double pole switch with a contact separation of at least 3 mm
in both poles.

Wiring external to the boiler must be in accordance with the current IEE Wiring Regulations (BS 7671).

Note: If a room thermostat is fitted, it must be suitable for 230/240 V switching.

3.3

AIR SUPPLY

The boiler does not require any air vents for cooling in the room in which it is installed or when installed in a cupboard or
compartment. 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 with the Building Regulations.

3.4

FLUE SYSTEM - Fig. 3

The flue system must be installed in accordance with BS 5440:1.

For horizontal flues ensure there is a slight downward slope towards the terminal.

Flue components are available as follows:-

Top easy-flue 500 mm (includes 90° bend), refer to separate instructions

0.75 m flue
90° bend
45° bend
Vertical flue terminal assembly. Refer to the separate installation instructions supplied with the assembly.
A Twin Pipe Flue system is available for use with all the boilers in the range. Refer to the separate instructions for details.

The following methods determine the correct length of flue required.

For rear exit flue L = B + 175 mm

For side exit flue L = B + C + 185 mm (min. side clearance required is 5 mm)

For vertical flue L = H minus 1000 mm for vertical terminal assembly

Where

L = Required flue length

B = Finished wall thickness

C = Distance from the inside wall to the side of the boiler

H = Distance from top of boiler side panel to roof position

Note: 1. If  an extra 90° bend is used, this reduces the maximum flue length by 1 m. Each 45° bend used reduces the maximum

flue length by 500 mm.

2. Under no circumstances must the flue length (including allowances for extra bends) exceed 4 metres.

3. Failure to use Alpha flue components with the boiler will invalidate the boilers CE approval, guarantee and may be unsafe.

3

GENERAL BOILER INFORMATION

Alpha CB24/28 - General Boiler Information

Содержание Alpha CB24

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

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

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

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

Страница 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...

Страница 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...

Страница 35: ...35 Alpha CB24 28...

Страница 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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