How to Install a Split System Air Conditioner

Intermediate 15 min 15 steps 33389 views Rating: 3.8/5 Published: 2026-04-05

Select an unobstructed location on your interior wall to mount the indoor unit.. Secure the mounting plate to the interior wall.. Drill a 3 in (7.6 cm) hole through the wall so you can feed the pipes outside.

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Steps

1

Select an unobstructed location on your interior wall to mount the indoor unit.

Step 1

Select an unobstructed location on your interior wall to mount the indoor unit.

2

Secure the mounting plate to the interior wall.

Step 2

Secure the mounting plate to the interior wall.

3

Drill a 3 in (7.6 cm) hole through the wall so you can feed the pipes outside.

Step 3

Drill a 3 in (7.6 cm) hole through the wall so you can feed the pipes outside.

4

Check the electrical connections on the indoor unit.

Step 4

Check the electrical connections on the indoor unit.

5

Run the pipes and cables through the hole in the wall, then connect them to the

Step 5

Run the pipes and cables through the hole in the wall, then connect them to the unit.

6

Secure the indoor unit to the mounting plate.

Step 6

Secure the indoor unit to the mounting plate.

7

Position the outdoor unit away from any heavily trafficked, dusty, or hot areas.

Step 7

Position the outdoor unit away from any heavily trafficked, dusty, or hot areas.

8

Lay a concrete pad on the ground.

Step 8

Lay a concrete pad on the ground.

9

Secure the outdoor unit on top of the concrete pad.

Step 9

Secure the outdoor unit on top of the concrete pad.

10

Check the electrical wiring in the outdoor unit.

Step 10

Check the electrical wiring in the outdoor unit.

11

Connect the piping and cable to the outdoor unit.

Step 11

Connect the piping and cable to the outdoor unit.

12

Bleed the air and humidity from the refrigerant circuit.

Step 12

Bleed the air and humidity from the refrigerant circuit.

13

Affix the piping to the wall with clamps.

Step 13

Affix the piping to the wall with clamps.

14

Seal up the hole in the wall using expanding polyurethane foam.

Step 14

Seal up the hole in the wall using expanding polyurethane foam.

15

Turn on the unit and enjoy the cool air!

Step 15

Turn on the unit and enjoy the cool air!

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