Power Cord Cnnection; Connection Of Communication Wire Between Indoor Unit And Outdoor Unit(Or Indoor Unit) - Lennox VRF VELD024N432U Installation & Operation Instructions

Low ESP Fan Coil Indoor Unit
5.2 Power Cord Connection
Notes:
All indoor units must be unified of power supply so that they can be powered ON/OFF at the
same time.
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L, N,".
(4) Fix the power card with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit(or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as
shown in fig5.3.1.
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in fig 5.3.2,
terminal resistor is provided with each ODU.
Fig 5.2
Fig 5.3.1
20
Fig 5.3.2