Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manual de instalación descargar pdf (Pagina 43)

VRF-SVN33A-EN 43

Pre-Start Checks

After installation and before the test operation is conducted, perform the following pre-start checks:

1. Ensure that the power and communication cables of the indoor and mini outdoor units are

properly connected.

2. Before supplying power, use a resistance tester to verify that resistance to ground is greater

than 30 M.

3. Ensure that the indoor units are connected.

4. Check for a short-circuit between the communication terminal and ground.

5. Ensure that the pre-start checklist (Table 27) has been completed.

NOTICE

Avoid Damage to the Communication Circuit!

Do not measure the communication terminal with an insulation tester. Doing so will damage

the communication circuit.

Table 27. Pre-start checklist

Installation

Mini outdoor

unit

• Have you checked the external surface and the inside of the unit for damage?

• Is there any possibility of short circuit due to the heat produced by the outdoor unit?

• Is the place well-ventilated and meets recommended requirements for clearances

and service?

• Is the outdoor unit installed securely to withstand external forces?

Indoor unit

• Have you checked the external surface and the inside of the indoor unit?

• Is there enough space for service?

• Have you ensured that the center of the indoor unit is installed horizontally and is

level?

Refrigerant pipe

• Have you selected the correct pipes?

• Are the liquid and gas valve open?

• Is the total number of connected indoor units within the allowable range?

• Are the length and the height difference between the refrigerant pipes within the

allowable range?

• Are the branch joints properly installed?

• Has the connection of liquid and gas pipes been correctly performed?

• Have you selected correct insulator for pipes and insulated them correctly?

• Is the pipe or connection part properly insulated?

• Is the quantity of the additional refrigerant correctly weighed in? (You must record

the amount of additional refrigerant charging on the service record paper placed

outside the outdoor unit.)

Drain pipe

• Have you checked whether the drain pipes of the indoor unit and outdoor unit are

connected together?

• Have you completed the drain test?

• Is the drain pipe properly insulated?

Electrical

• Are the power cable and communication cable tightened firmly on the terminal

board within the rated torque recommendations?

• Have you checked for cross connection of the power and communication cables?

• Have the outdoor unit been properly grounded?

• Is the communication cable shielded?

• Is the wire length within the recommended limit?

• Is the wiring route correct?

Setting address

• Are the address of the indoor and outdoor units properly set?

• Are the address of the indoor and outdoor units properly set, if multiple remote

controllers are to be used?

Option

• Ensure that the vibration-isolation structure is correctly installed or if one needs to

be installed.

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