45MBCAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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REFRIGERANT PIPING CONNECTION
When connecting refrigerant piping, DO NOT let substances or gases other than the specified refrigerant enter the unit. The presence of other gases or
substances will lower the unit’s capacity, and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and injury.
Notes on Pipe Length and Elevation
Table 4 — Maximum Length and Drop Height
Ensure that the length of the refrigerant pipe, the number of bends, and the drop height between the indoor and outdoor units meets the requirements
shown in the table next to it.
Connection Instructions—Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure efficient operation and minimize the need for future
maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than the measured distance.
3. Make sure that the pipe is cut at a perfect 90° angle.
Fig. 21 —Cut Pipes
Model Length of Piping Maximum drop height
9K/12K 82ft/25m 49.2ft/15m
18K 98.4ft/30m 65.6ft/20m
24K 164ft/50m 82ft/25m
36K/48K 246ft/75m 98.4ft/30m
• DO NOT install the connecting pipe until both indoor and outdoor
units have been installed.
• Insulate both the gas and liquid piping to prevent condensation.
CAUTION
DO NOT DEFORM PIPE WHILE CUTTING
Be extra careful not to damage, dent, or deform the pipe while
cutting. This will drastically reduce the heating
CAUTION
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