Connect the Refrigerant Piping to the Indoor Unit for Quantum Ultra Ceiling Cassette (CYT-24) SystemsUpdated an hour ago

Introduction

This article explains how to connect the refrigerant piping to the indoor unit for Quantum Ultra Ceiling Cassette (CYT-24) systems. 

After connecting the refrigerant piping to indoor unit, follow the steps wrapping the lines and sealing the air gaps. 

Steps

1. Unwind the copper piping kit. 
2. Bring the ends of both the copper line and the indoor unit line together. Align the centers of the pipes that will be connected. 
3. Remove the indoor unit piping cap and check that no debris is inside. Some gas may be heard escaping, but it is dry nitrogen to keep lines clean. 
4. Apply leak-prevention gels or gaskets to all mating surfaces if available.
5. Attach the flare nut and tighten as much as possible by hand. 
6. Torque correctly to the specifications found in the table below using two wrenches. 

   Pipe Diameter	Tightening Torque [N x m]	Tightening Torque [ft-lbf]	Corresponding Stress (Using a 20 cm wrench)
   Ø ¼ (6.35 mm)	15-20	11-15	Wrist Strength
   Ø ⅜ (9.52 mm)	31-35	23-26	Arm Strength
   Ø ½ (12 mm)	45-50	33-37	Arm Strength
   Ø ⅝ (15.88 mm)	60-65	44-48	Arm Strength

   

   Tightening Torque [N x m] (ft-lbf)
   Service Port Nut	[7-9] (5-7)
   Protection Caps	[25-30] (18-22)

7. Repeat the process for the other copper line. 

Wrap the Lines & Seal Air Gaps

Note: Even small gaps can result in air or water leakage, or cause condensation to form. 

1. Arrange the pipes, cables, and drain hose correctly. 
2. Lag the pipe joints with insulation material and secure them with vinyl tape. 
3. Run the bound bundle through the wall hole, ensuring not to kink the drain pipe when binding. 
4. Ensure all connections between the panel and ceiling, as well as between the panel and indoor unit are properly sealed.