Installation Instructions V1.4 - Sekstant Gateway | Page 5 7. Remove the 3 black plugs on the communication plate and use a cone drill size n-26 mm to make the center hole larger. If the unit is not fitted with a communication plate, see Section 8. 8. Clean the communication plate with a clean cloth so it is free from oil and dirt. 9. Dismount the communication plate and remove the grey plug. On SCU, the grey plug is located at the top of the left side of the controller cabinet and can be reached from behind the condenser fan.
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