Piping Preparation
1. Do not open service valves or remove protective caps on pipes until instructed by this manual.
2. Keep tubing free of dirt, sand, moisture and contaminants.
3. Insulate each refrigerant pipe and condensate hose with minimum 3/8” (10 mm) wall
thermal pipe insulation.
4. Bind refrigerant pipes and communication cable together with cable ties at 12-inch intervals.
5. Include the condensate hose in bundle for exterior portion only.
10
PIPING INSTALLATION
Refrigerant Piping
Drill Hole in Wall
1. Locate and mark proper location for the wall hole.
2. Cut the wall hole with a 5° to 10° downward
slant to the outdoors. See Wall Hole Size table.
3. Insert a wall sleeve (field supplied) into hole to
to prevent damage to refrigerant pipes, insulation,
condensate drain hose and wiring.
4. Proper weather proofing of the wall surface and
wall sleeve is essential to assure a trouble-free
installation. Apply sealant, caulking or equivalent
weather proofing material around the perimeter of
the wall sleeve (interior & exterior) to eliminate
outdoor air and water leaks into the indoor space.
NOTE:
Expandable foam insulation may be added to fill large wall gaps.
Apply per manufacturer's instructions.
Seal Hole
Hole Size
Indoor
Outdoor
Wall Hole Diagram
Oil return bend
Indoor
Outdoor
20 ft.
30 ft.
Oil return bend
Indoor Unit below Outdoor Unit Application
When height difference between indoor unit and outdoor
unit is more than 30 feet, an oil return bend should be added
for every 20 feet of connection pipe as shown.
Wall
Hole Sleeve
Unit Size
Wall Hole Size
(BtuH)
Dia
- inch (mm)
9,000
2 1/4 (55)
12,000
2 1/4 (55)
18,000
2 3/4 (70)
24,000
2 3/4 (70)