Airwell EFL 100-3R410, Техническое руководство, Страница: 18 / 328

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Design of 3-WAY FLOW LOGIC
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Installation standards
Relationship between A/C units and the refrigerant tubing
(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).
• Use a field supply ball valve.
NOTE
Main tube
Ball valve (for extension)
To indoor unit
Outdoor unit
for extension
Discharge tube
Balance tube
(Suction tube)
(Planned expansion)
Main tube of distribution joint
Liquid tube
Less than 40 cm
Distribution joint
Outdoor unit Outdoor unit Indoor unit
Suction tube
Discharge tube
Narrow tube
Balance tube
Suction tube
Discharge tube
Narrow tube
Wide tube (gas)
Narrow tube (liquid
4-tube layout 3-tube layout 2-tube layout Solenoid
valve kit
Indoor unit
Room
Hallway
Indoor unit
Room
Indoor unit
Room
Hallway
Indoor unit
Room
Solenoid
valve kit
Solenoid
valve kit
● Install the solenoid valve kit 30 m or less from the indoor unit.
●
In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat notice-
able. It is recommended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside
the room.
Common solenoid valve kit
● Multiple indoor units under group control can utilize a solenoid valve kit in common.
● Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit Total capacity of indoor units (kW)
160 16.0 Total capacity < 5.6
56 5.6 Total capacity 2.2
● If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
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