7 important guidelines for split AC installation

Window AC uninstall

The installation of the split air conditioners is a crucial job. If the installation is done accurately your air conditioner will give optimum cooling, but if it is not done properly you won’t get the desired cooling effect. A poor installations also leads to frequent maintenance problems.

Several factors have to considered during the installation of split air conditioner.

Strength of wall to hold the AC

The indoor unit of split AC must be installed on a wall strong enough to hold the unit’s weight.

Proper spacing between wall ans AC unit

The indoor unit of split AC requires at least 15 cm of open space surrounding its top and sides for proper air flow.

Appropriate installation height from ground

Mount the indoor unit of split AC at a height of 7-8 feet above the ground for adequate cooling inside the room

Correct tilt angle of indoor unit

While fixing the aluminum bracket on wall make sure that the bracket is given a slight tilt angle, so that the indoor unit of split AC, when fitted is also at a slight angle to enable unrestricted flow of the condensed water from the drain pipe.

Correct location of outdoor unit

For proper cooling, mount the indoor and outdoor units of split AC at location away from direct sunlight and water. Install the outdoor unit of split AC in open space so that there is no hindrance to the heat dissipated from the condenser.

Proper placement of outdoor unit

The outdoor unit of split AC must be placed on a flat and rigid surface. This unit contains key components of split AC like compressor, condenser, fan motor etc. If the unit is not on a flat surface then it will vibrate excessively, which can lead to the breakage of copper pipes, coolant leakage and compressor/condenser damage. Further, the vibrating unit makes lots of noise which could disturb you and your neighbors.

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Right distance between indoor and outdoor unit 

Correct distance between the indoor and outdoor unit plays a very important role in cooling. The coolant at very low temperature flows inside the copper tubes between indoor and outdoor units of split AC. There is always some loss of cooling effect to the atmosphere when the refrigerant flows between the units. Hence to reduce this loss, keep the distance between the indoor unit of split AC and the outdoor unit of split AC as minimum as possible. The maximum allowable distance between the indoor and the outdoor units of split AC can be about 15 meters.

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34 Comments

  1. 1

    Hi I have installed 5/8 pipe few months back . Now I have bought 1 ton split. It comes with 3/8 pipe. I can’t change the plpe as it is concealed. I hope it will not effect the cooling of the split. Please help

    • 2

      Hi Ravinder,
      We are sorry to inform you that using a 5/8 copper pipe will affect AC’s cooling. This is because the compressor is designed to circulate coolant at a particular pressure (depends on the AC’s tonnage), thus using a wider pipe will reduce the pressure which intern reduces cooling capacity. We suggest you to use the pipes supplied with the AC. No need to take out the 5/8 pipe from the wall. Just get the 3/8 pipe installed parallely.

      Kanishk,
      Mr Right Team

  2. 3

    can i place CU over the door if no alternative location exist? would it jeopardize ashrae 15 requirement? , if so does a drip pan will solve that issue.

  3. 5

    My indoor unit of 1.5 ton 183v Voltas AC felt from 3 Ft height on cemented floor at the time of installation. What may happen into it?

    • 6

      Hi Ajay, sorry to hear that!
      Get the blower fan checked for proper functioning and cooling of the AC checked for any leakages. Damage to any other part won’t affect it’s performance.

      Kanishk,
      Mr Right Team

  4. 7

    We have installed a split ac where tge distance berween the 2 units…indoor and outdoor is as back to back on each side of the wall.however the pipe through which the gas passes for cooling is a 3 metre pipe coiled up and pinned to the wall.
    Wont that result in loss of cooling.we dont need such a long pipe when the distance of travel of the gas is less than a metre.
    Please advise…should the pipe be cut short?

    • 8

      we also have the same question.
      can somebody answer this as soon as possible?
      an authority on this is highly welcome.

      • 9

        Hi S.Basu and Sonali,
        Sorry for the delayed respose. There is no practical loss in cooling capacity of the AC for a under 3meter connection. No need to cut the pipes.

        Kanishk,
        Mr Right Team

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    • 11

      Hi Madhuri,
      Cement sheets don’t have the rigidity to support a split AC. Thus, not recommended.

      Kanishk,
      Mr Right Team

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    what will happen if other shop owner install out door unit of split a/c in passage ( which 3 feet ), after ther my shop in shoping complex

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    thanks for useable information, plz guide if distance between indoor to out door unit is approximately 90 ft, in this senerio is the split unit work properly

  13. 20

    The information that talked about the indoor unit of a split AC and how it should be mounted at a height of 7-8 feet above the ground is what got my attention. I say that because my father went to the store to get a split AC unit to replace his old one. The last one he had was below the height of 7-8 feet.

  14. 21

    Thanks for a useful article. How do you want the indoor unit to be tilted – on one side or backward? A line diagram would be useful. My split AC was tilted to one side and that led to water seepage inside. I got it leveled with a spirit level and refixed – no seepage now! Cost me 3000 as gas had to be refilled. Aren’t split units designed to have a natural flow of water outside through the tube when installed level? I have not seen any split unit mounted with a tilt till date (except my own that was done incorrectly by Whirlpool – company with poor service record). I have seen window ACs mounted with outer edge tilted down to drain water but never a split AC. In fact Internet has guidelines that advise using spirit level to ensure level mounting of split AC unit !!!

  15. 22

    How much minimum free space should be maintained in front of the fan grill of the outdoor unit of a 1TR split AC ?

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    The building next to building has installed the outdoor unit in front of my kitchen. There is open utility between the a unit and my kitchen. Will the heat generated from the AC harm the air entering my kitchen?

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