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4. Connect one end of the accessory cable to the accessory port on the PC Board. Connect the other
end of the cable to the switch circuit board accessory port.
5. For internal units, flip the switch circuit board to where the circuit board side will be facing the inside
of the unit.
External (Outdoor) Units
6. Install the switch circuit board to the controller bracket using the hooks at the top of the controller
bracket.
28
PC Board
Accessory cable
accessory
port
Hydronic Air Handler Installation and Operation Manual
Internal (Indoor) Units
Switch circuit
board
accessory port
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