Installing The Refrigerant Piping; Flaring Process And Bending Pipes - Trane M4MHW17-A Installer's Manual

4. Place the outdoor unit on the support base.
5. Secure the foot holes of the outdoor unit with bolts (shown below).

Installing the Refrigerant Piping

Flaring Process
1. Hold the pipe downward to prevent cuttings from entering the pipe.
2. Using an appropriate tube cutter and deburring tool, cut and deburr the refrigerant pipe.
3. Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the
indoor unit, put them onto the refrigerant pipe as shown below then flare the refrigerant pipe
with a flaring tool.
4. When flaring copper tubing, only use flaring tools that utilize an orbiting mandrel and clutched
handle. These are typically referenced as R410A flaring tools. By using this type of flaring tool,
the copper tubing is rolled while being pressed, thereby reducing the probability of copper flare
cracking.
5. Check if the flare part is spread evenly and there are no cracks.
Bending Pipes
1. Use a refrigerant pipe bending tool to shape refrigerant piping; smaller diameter piping may
allow for light hand bending, providing minimum diameter of 6 inches.
2. Do not bend the pipes in an angle more than 90°.
3. When pipes are repeatedly bent or stretched, the material will be prone to damage, which may
lead to refrigerant leaks. Do not bend or stretch the pipes more than three times.
88-M4MHW17-1B-EN
Foot holes
Foot holes
Installer's Guide
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