CONNECT REFRIGERANT PIPES BETWEEN THE INDOOR AND OUTDOOR UNITS
First, connect the copper tubes at indoor unit. Bend the pipes accordingly using pipe bending tools. Do Not hand
bend the pipes as this could kink the pipe. Extra length is required for future service.
REFRIGERANT PIPES
For a distance other than 25' between indoor and horizontal venting condensing units, refer to the following table for
copper sizes.
Refrigerant Valve and Pipe Size/Length
Btu/h
Valve Size
Line Sizes at Different Lengths
Liquid Gas
15
– 30 ft.
31
– 60 ft.
07K
1/4”, 3/8”
1/4”, 3/8”
1/4”, 3/8”
09K
1/4”, 3/8”
1/4”, 3/8”
1/4”, 3/8”
12K
1/4”, 3/8”
1/4”, 3/8”
1/4”, 3/8”
18K
1/4”, 1/2”
1/4”, 1/2”
1/4”, 1/2”
24K
1/4”, 5/8”
1/4”, 5/8”
3/8”, 5/8”
Running Interconnecting Refrigerant Lines:
Use clean refrigeration grade copper pipe only. Keep the copper lines from kinking and transmitting any noise to
walls, cabinets, etc. Pipe length not to exceed 150 feet, elevation not to exceed 35 feet. Insulate both the liquid and
gas copper lines with at least 3/8-inch-thick insulation tubes. Band, tape and secure the refrigerant lines. Support
copper lines at a proper distance apart to keep the tubes from sagging.
CUT REFRIGERANT PIPE
Make sure where the pipe is to be cut is straight and smooth. Engage the cutting blade. The cutting blade must be
straight and perpendicular to the pipe surface. Don't cut too fast or apply too much pressure. Turn and tighten the
tube cutter slowly. Remove residual and de-bur the cut edge. The cut edge should be smooth and clean.
Summary of Contents for VRFI-07EW-D2B(55)5
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