Installer Information - Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual

IMPORTANT: In designing a connection for the Ecogen 24/1.0 the electrical installer has to
consider all the issues that would need to be covered for a conventional final circuit, including:-
In Accordance with BS: 7671.
• the maximum demand (and the generator output)
• the type of earthing arrangement
• the nature of the supply
• external influences
• compatibility, maintainability and accessibility
• protection against electric shock
• protection against thermal effects
• protection against over current
• isolation and switching
• equipment selection and installation issues
The electrical installer should check that the prospective fault current would not change
sufficiently to exceed the fault rating of existing protective devices.
Main Service
Fuse
Suppliers
Bi directional
Electrical Billing
Meter
DNO's Customer's
Wiring Wiring
Fig. 13
Main Service
Fuse
Suppliers
Bi directional
Electrical Billing
Meter
DNO's Customer's
Wiring Wiring
Fig. 13a
Existing
Consumption
Main Service
Meter
Fuse
Export Meter
DNO's Customer's
Wiring Wiring
Fig. 13b
© Baxi Heating UK Ltd 2012
16A Circuit Breaker
(2 Pole RCD)
Consumer unit
Socket(s)
16A Circuit Breaker
(2 Pole RCD)
Consumer unit
Socket(s)
16A Circuit
Breaker
(2 Pole RCD)
Generation
Meter
Consumer unit
7.0 Site Requirements
7.7
11. Whichever of the two options is chosen, it is imperative that
the safety of the electrical installation is not impaired by the
installation of the Ecogen 24/1.0.
12. To enable the FIT to be claimed the electricity generated and
exported must be monitored by meters installed into the
electricity supply as shown in Figs. 13,13a and 13b, for the export
either bidirectional meters as in Figs. 13 and 13a, or by leaving the
existing meter and adding an additional meter as in Fig. 13b. An
extra meter must be added just before the appliance to measure
the electrical generation. The serial number must be submitted
for MCS submission and recorded in both the DNO leaflet and
the Micro CHP system commissioning checklist benchmark sheets
13A BS1363
at the back of these instructions.
Switch Fused Spur
(securable)
13. The Ecogen 24/1.0 must not be connected to an installation
by means of a plug and socket.
14. The essential criteria which must be met are given below for
both options.
15. Connection of an Ecogen to a dedicated circuit
(i) The basic design parameters for the circuit are:
Ecogen
Appliance
13A BS1363
Switch Fused Spur
(securable)
(ii) Where an Ecogen is connected on the same side of an RCD
as final circuits protected by that RCD, the RCD must disconnect
the line and neutral conductors.
Ecogen
Appliance
(iii) The Ecogen must be provided with means of isolation and of
switching off for mechanical maintenance.
16. Connection of a Ecogen to an existing final circuit
(i) The basic design parameters for the circuit are:
13A BS1363
Switch Fused Spur
(securable)
Ecogen
Appliance
Electrical Connection (cont) - Installer information
I b > I g where I b is the design current and I g is the rated
output current of the Ecogen
I n > I b where In is the nominal current of the overload
protective device
Disconnection of the final circuit in the event of an earth
fault on the circuit and de-energising of the Ecogen should
both occur within an overall maximum time of 0.4 s for TN
systems and 0.2 s for TT systems. However, if the protective
device for automatic disconnection in case of an earth fault
disconnects line and neutral conductors, it is not necessary
to take account of the time taken for the Ecogen to de-
energise.
I z > I n +I g where Iz is the current carrying capacity of the
conductors of the final circuit, In is the nominal current of
the overload protective device and I g is the rated output
current of the Ecogen. This may require the protective
device to be replaced with one having a lower nominal
current rating.
Disconnection of the final circuit in the event of an earth
fault on the circuit and de-energising of the Ecogen should
both occur within an overall maximum time of 0.4 s for TN
systems and 0.2 s for TT systems. However, if the protective
device for automatic disconnection in case of an earth fault
disconnects line and neutral conductors, it is not necessary
to take account of the time taken for the Ecogen to de-
energise.
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