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40MBFAQ: Installation Instructions
PRIOR TO INSTALLATION
REFRIGERANT PIPING CONNECTION
NOTE: When connecting refrigerant piping, do not allow substances
or gases other than the specified refrigerant to 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.
NOTE: 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 listed in Table 4.
Table 4 — Maximum Length and Drop Height Based on
CAPACITY (BTU/H)
PIPING LENGTH
12K
CAUTION
The branching pipe must be installed horizontally. An angle of more than
10° may cause malfunction.
DO NOT install the connecting pipe until both indoor and outdoor units
have been installed.
Insulate both the gas and liquid piping to prevent water leakage.
Step 1 - Cut Pipes
When preparing refrigerant pipes, take extra care to cut and flare them
properly. This ensures efficient operation and minimizes 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. Ensure the pipe is cut at a perfect 90° angle.
90°
Fig. 4 — Pipe Cutter
CAUTION
DO NOT DEFORM PIPE WHILE CUTTING
Be extra careful not to damage, dent, or deform the pipe while cutting.
This drastically reduces the heating efficiency of the unit.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Models
MAXIMUM DROP
HEIGHT
15/49
8/26
Oblique Rough Warped
Step 2 - Remove Burrs
Burrs can affect the air-tight seal of refrigerant piping connection. They
must be completely removed.
1. Hold the pipe at a downward angle to prevent burrs from falling into
the pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section
of the pipe.
Point down
Fig. 5 — Reamer
7
Pipe
Reamer
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