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4 GENERAL BOILER INFORMATION
Alpha Evoke 28 and 33 - General Boiler Information
4.1 GAS SUPPLY
The meter and supply pipes must be capable of delivering the required quantity of gas in addition to the demand
from any other appliances connected to the same gas supply.
Refer to Technical performance data in Section 3.1 and 3.2.
The complete installation, including the meter, must be tested for gas tightness and purged as described in BS 6891.
4.2 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.
4.3 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.
4.4 FLUE SYSTEM - Figs. 4.1, 4.2
The flue system must be installed in accordance with BS 5440:1.
When using a horizontal flue kit ensure that the flue outer duct is installed horizontally (please note that the flue
inner duct already has a pre-determined slope towards the boiler for condensate to run back towards the boiler).
When additional flue extensions are used, ensure the flue slopes downwards towards the boiler by a minimum of 25 - 30 mm
per metre of flue.
Horizontal and vertical flue assemblies should be supported every metre with access provided to the joints.
Additional flue components are available as follows:-
CD EasyFlue 500 mm telescopic terminal - Part No. 6.12000510.
CD EasyFlue 1000 mm telescopic terminal - Part No. 6.12001010.
CD 750 mm flue extension - Part No. 6.2000750.
CD 1000 mm flue extension - Part No. 6.2001050.
CD 100 mm flue support brackets (pack of 5) - Part No. 6.1000355.
CD 90° bend - Part No. 6.2000590.
CD 45° bend - Part No. 6.2000545.
CD Vertical flue terminal kit - Part No. 6.2000520. Refer to the separate installation instructions supplied with the kit.
Flue support brackets - Part No. 6.1000355.
Terminal guard - Part No. 6.2000570.
Additional flue accessories and plume management are also available.
Note: 1.
If an extra 90° bend is used, this reduces the maximum flue length by 1.3 m. Each 45° bend used reduces the
maximum flue length by 0.9 m.
2.
Under no circumstances must the flue length (including allowances for extra bends) exceed 12 metres horizontally
and only 14 metres vertically.
3.
Failure to use Alpha flue components with the boiler will invalidate the boilers CE approval, guarantee and may be
unsafe.
