Connect the Refrigerant Piping to the Indoor Unit for Wall-Mounted SystemsUpdated 2 days ago
Introduction
This article explains how to connect the refrigerant piping to the indoor unit for wall-mounted systems.
For information on preparing the refrigerant piping, click here.
This article is for the following systems:
- Diamante Essenza (WYT-17)
- Diamante Pro (WYT-20)
- Quantum Ultra (WYT-24)
- Quantum Hyperformance (WYT-25)
- Quantum Fresh (WYT-FA)
Steps
Follow these steps to connect the refrigerant piping to the indoor unit:
- Bring the ends of both the copper line and the indoor unit line together. Align the centers of the pipes that will be connected.
- Remove the indoor unit piping cap and check that no debris is inside. Some gas may be heard escaping, but it is dry nitrogen keeping the lines clean.
- Use any leak guard and/or flare sealers on the flares of the piping.
- Attach the flare nut and tighten as much as possible by hand.
- Use two wrenches to torque correctly to the specifications found in the table below.
- Repeat this process for the other copper line.
Tightening Torque for Protection Caps and Flange Connection
Pipe Diameter | Tightening Torque [N x m] | Tightening Torque [ft-lbf] | Corresponding Stress (Using a 20 cm wrench) |
|---|---|---|---|
Φ 1/4" (6.35 mm) | 15-20 | 11-15 | Wrist strength |
| Φ 3/8" (9.52 mm) | 31-35 | 23-26 | Arm strength |
| Φ 1/2" (12 mm) | 45-50 | 33-37 | Arm strength |
| Φ 5/8" (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) |