Specifications

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1-15. Recommended Location of Ball Valves
● It is recommended that a ball valve kit be installed for each outdoor unit.
● Select a valve location that allows service to be easily provided for each unit or each refrigerant system.
(1) When adding ball valve for indoor unit
1. Location: Install the ball valve at the distribution tube (not main tube).
2. Installation requirements
• Be sure to install the ball valve up-grade to prevent the inadvertent flow of oil.
• Install the ball valve at the shortest distance (within 40 cm) from the main tube. If the diameter of the ball valve
is smaller than that of the main tube, use a reducer or the like to reduce the size of the tubing at that location.
• Select a place where it is easy to operate, using careful consideration of the location in advance.
(2) When adding ball valve for outdoor unit
1. Location: Install the ball valve at the main tube of the distribution joint.
2. Installation requirements
• Be sure to install the ball valve up-grade to prevent the inadvertent flow of oil.
• Install the ball valve at the shortest distance (within 40 cm) from the main tube. If the diameter of the ball valve
is smaller than that of the main tube, use a reducer or the like to reduce the size of the tubing at that location.
• If the ball valve is installed at the outdoor unit (including extension for outdoor unit), face the service port of
the valve toward the outdoor unit side (see above illustration; dotted line) and allow a distance of over 50 cm
from the outdoor unit. If the ball valve is installed between the indoor unit (including extension for indoor unit)
and the main tube, face the ball valve toward the indoor unit side (see above illustration; dotted line).
NOTE
Outdoor unit
Distribution tube
Distribution joint
Main tube
Ball valve (for extension)
Less than 40 cm
Indoor unit for extension
Main tube
Ball valve (for extension)
Main tube of distribution joint
To indoor unit
Outdoor unit
for extension
Narrow tube
Balance tube
Wide tube
Ball valve (for service)
Distribution tube
Main tube
Ball valve (for extension)
Indoor unit for extension
Required additional
refrigerant charge (kg)
04-396 Inverter-W_a-p50 ARGO 12/21/04 9:38 AM Page 23