Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manuel d'installation télécharger pdf (Page 21)

VRF-SVN33A-EN 21

Refrigerant Piping

Connecting Piping to the Mini Outdoor Unit

Important: Ensure that all pipe connections are accessible for servicing and maintenance.

Pipes can be connected to the mini outdoor unit at the front, back, bottom, left, or right of the unit:

1. Remove the pipe cover from the unit. See Figure 14.

Figure 14. Pipe connections on unit

2. Remove the knock-out that you are going to use. Unused knock-outs should remain closed to

prevent damage to the unit.

• Take care to prevent damage to the exterior of the unit.

• Remove burrs from knock-out hole edges and apply rust inhibitor.

3. Connect the pipes to the unit using flared connections or by brazing. If brazing the pipe

connection, avoid damaging the service valves by wrapping them with a wet cloth.

• Avoid damaging the temperature sensor.

• Ensure that the connected pipes do not touch each other or make contact with the unit.

Service valve: low pressure

(gas side)

Service valve: 

high pressure (liquid side)

Radiant heat vents

Liquid pipe

Gas pipe

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Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manuel d'installation Page 21