Installation

Read this first

These systems use refrigerant and high-voltage circuits. The Mini Split Shop sells equipment only. We recommend installation by an EPA Section 608 certified HVAC technician. Incorrect install can void the manufacturer warranty, create a leak or shock hazard, and is not covered by Setpile Corp. Some jurisdictions require permits. We do not pull permits and we do not refer a specific contractor unless we later publish a partner list.

Before the unit arrives

Pick the spots

Indoor unit: high on an exterior wall or one with a short path outside, with clear space around it and a downhill path for the condensate drain. Outdoor condenser: on a pad or wall bracket, level, with the manual's clearances, out of standing water, and as close to the indoor unit as practical; shorter line runs are better.

Electrical by voltage

• 115V units still usually need a dedicated circuit, not a shared outlet. Check the spec sheet for breaker size and local code.
• 208–230V units need a dedicated 208–230V circuit on a two-pole breaker, sized per the spec sheet, and a weatherproof disconnect at the condenser. They do not plug into a 115V wall outlet, and no adapter makes that safe.

What the kit typically includes

Costway kits typically include the indoor unit, the outdoor condenser, a pre-flared copper line set, communication wire, drain hose, wall mounting plate, and remote. Some include a condenser bracket. Check the product page for contents and line set length. Typically not included: disconnect, breaker, wire from the panel, pad, and tools.

Refrigerant

The condenser ships pre-charged for the line set length on the spec sheet. That does not make it a plug-in job. The line set still has to be flared, torqued, pressure tested, and pulled into a deep vacuum before the valves are opened, and longer runs may need refrigerant added. Those steps take tools and training, and handling refrigerant requires EPA Section 608 certification.

Permits

Many cities and counties require a mechanical permit, an electrical permit, or both. Your tech or building department will know.

Why not DIY the refrigerant side

Mounting the indoor unit and setting the pad may be within reach. The refrigerant side is different. A bad flare leaks and dumps the charge. A skipped vacuum leaves moisture in the lines and shortens the compressor's life. Either one can void the manufacturer warranty, and neither is covered by Setpile Corp. The savings are small next to the price of a compressor.

What to ask a tech for

• EPA Section 608 certification and a contractor license where required.
• A nitrogen pressure test and a vacuum to 500 microns (or the manual's spec) before the valves are opened.
• Flares torqued to the manual's spec.
• A dedicated circuit and disconnect sized to the spec sheet.
• A condensate drain that runs downhill to a spot that will not stain or pool.
• An itemized invoice with serial numbers; you will need it for a warranty claim.

See also the Sizing Guide and the Warranty page.