Things to consider during installation.

As previously stated, unless you’re F-gas qualified you mustn’t touch the refrigerant pipework connections on the indoor or outdoor units. Just leave the pipework ready and Checkmark will handle the regulated aspects. This also saves you having to purchase specialist tools.

It’s impossible to pre-empt every installation situation, but the following pages should give you a good idea of what to expect during the install process.

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The hole

The hole between inside and outside that carries the refrigerant lines and cables.

Inside unit

Mounting the inside unit of an air conditioner or air-to-air heat pump.

Outside unit

Mounting the outside unit of an air conditioner or air source heat pump.

Refrigerant lines

Preparing the refrigerant lines (pipes) of your mini-split unit.


The condensate tubing for both indoor and outdoor units.

Electrical connections

Cabling and electrical connections.