How Do You Install Heat and Air Wall Units?

How Do You Install Heat and Air Wall Units?

Installing a heat and air wall unit without the use of ducts is a moderately difficult project requiring about five hours including installing and setting up the condenser, locating and mounting the air handler and concealing the lines and pump. A single air handler provides climate control for approximately 1,000 square feet. Up to four units can connect to one condenser for independently controlled zones.

In order to install a heat and air wall unit, follow the steps below.

  1. Install the condenser
  2. The condenser is installed by bolting it onto a concrete pad or mounting it onto wall brackets in a shaded area with at least four inches of clearance behind it and 20 inches of space above and in front of it.

  3. Mount the air handler
  4. Mount the air handler plate into studs on an exterior wall no more than 33 feet from the outdoor condenser and drill a wall sleeve at the bottom right of the plate. Attach the refrigerant, control lines and condensate drain hose to the unit and tape them together. Feed the taped hoses into the wall sleeve and attach the unit to the plate.

  5. Set up the condenser
  6. Connect the outdoor unit to the indoor unit's control wire, running to the jacketed power cable that connects to the breaker panel. Fasten the ends of the refrigerant lines to the condenser with flare nuts.

  7. Hide the lines and cover
  8. Using a plastic channel screwed into the house, encase the lines, wires and drain. Cap and seal after testing for proper drainage. On the interior unit, ensure the gauge manifold and vacuum pump are hooked up to the refrigerant lines and install the unit cover.