Cisco 3905 Gebruikershandleiding - Pagina 8

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8 • UK

2.5 EFC21/25 coupled directly to a gas fireplace control

Description

Example showing how a EFC21/25 controller can be connected directly to a gas fire without having

to use an extra SMG. This type of installation requires a fire with a controller that has flame-detec-

tion and automatic ignition – or a permanent pilot light. If there is insufficient chimney draught

(detected by the fan pressure switch) the controller will switch off the gas fireplace (potential-free

switch).

• Connect the mains earth to the earth terminal of the chimney fan.

• Connect the chimney fan and pressure switch to terminals 1–5.

• Optional external ON/OFF switch is connected to terminals 8–9.

• Connect the optional Air inlet monitoring to terminals 10–11. If this monitoring

is not mandatory then a jumper must be fitted across terminals 10–11.

• Connect start/activate burn control to terminals 12–13 (potential-free switch).

• Connect the optional HIGH flame setting (step 2 – EFC25 only) to terminals

14–15 (potential-free switch).

• Connect mains supply to terminals marked "Supply".

Wiring diagram EFC25

Fig.10a

Wiring diagram EFC21

Fig.10b

3001736-EFC21-EFC25-UK