Wire the Indoor Unit to the Outdoor Unit for Floor-Ceiling Flex SystemsUpdated 10 days ago

Introduction

This article explains how to wire the indoor unit to the outdoor unit for floor-ceiling flex systems. The article also explains how to connect the signal cable for the indoor unit. 

This is the fifth step in the installation process for floor-ceiling flex indoor units. 

This article is for the following system: 

Quantum Ultra Floor-Ceiling Flex (UYT-24)

Indoor Unit Wiring

Open the electrical junction box to access the wiring terminals. Ensure that all connecting wires are routed through the wire-inlet rubber grommet to maintain a proper seal. 

Connect the wires in accordance with the wiring diagram, then verify that all wire strands are fully inserted and securely clamped at the terminals. All connections must be tight and free of looseness. 

UYT-24		18K	24K
		Sectional Area (AWG)
Power Supply Cable	L2	12 AWG	12 AWG
	L1
Connection Cable for Communication Between Indoor & Outdoor Units	3(L)	16 AWG	16 AWG
	2(N)
	1(S)

Consult the nameplate on the system for detailed electrical specifications. 

230V systems require a double-pole breaker (tandem-type will not work). 

Connect the Signal Cable

The indoor unit has three terminals (1, 2, 3) and a ground terminal (g). It is vital that the colors and numbers between the indoor and outdoor units match for each terminal. The color selection does not matter as much as matching number to number does. Do not mix up the wires between each end. 

Connect the wires in accordance with the wiring diagrams, then verify that all wire strands are fully inserted and securely clamped at the terminals. All connections must be tight and free of looseness. 

Consult the diagram affixed to the indoor and outdoor units respectively for specific wiring instructions.