Delta MCS-1800 Service Manual download pdf (Page 53)

MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR

Telephone 08456 448802 Fax 08456 448803 Email info@mhgheating.co.uk Web www.mhgheating.co.uk

020315 Draft

4. Release the GFS controller from the DIN rail using a flat bladed screw driver.

5. Open the GFA controller housing using a flat bladed screw driver.

6. Install the GFA PCB within the existing GFA housing.

1, bottom housing 2, New GFA PCB 3, Top Housing.

7. Clip the new controller on to the DIN rail and reconnect the dedicated plug assemblies.

Special attention needs to be paid to the JUMPER location and the connection of the BUS2 plug.

This must be located between PIN 1 & 2 (Counted from the left)

Each new controllers must now be allocated a cascade address via the Theta controllers.

**This must take place one at a time!!!**

Leave the X20 connected to the newly replaced GFA Module controller.

All existing GFA Module controllers within the cascade must be disconnected from the power

supply by removing all other Plug X20s

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Delta MCS-1800 Service Manual Page 53