SiE-05C
Outdoor Unit Refrigerant System Diagrams
Functions PLUS Series
205
A. Solenoid valve (for shutting system 2 equalized pressure gas pipe) Y3S
2-way solenoid valve for shutting the equalized pressure gas pipe of the second system when system 2
outdoor units are stopped during cooling.
(Features)
External pressure equalizing (maintains pressure difference outside the valve in order to drive the valve) 2-
way solenoid valve that opens when energized and closes when not receiving power. Construction is
similar to 4-way valve, and similarly does not operate unless there is differential pressure (3.5 kg/cm
²
).
B. Solenoid valve (for system 1 devices) Y5S
Solenoid valve primarily for supplying system 2 and 3 outdoor units with excess oil from system 1 outdoor
units during cooling oil equalizing operation. (Pressure equalized pipes are closed at this time.)
C. Solenoid valve (for system 2 bypass) Y6S
Solenoid valve primarily for supplying system 1 outdoor units with excess oil from system 2 outdoor units
during cooling oil equalizing operation. (Pressure equalized pipes are closed at this time.)
SI-05C.BOOK Page 205 Monday, November 6, 2000 4:13 PM
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