3-12
MAIN PARTS
3.6 Electronic Expansion Valve
3.6.1 Electronic Expansion Valve for Outdoor Units
Micro-Computer
Pulse Signal
2-Phase Permanent Magnetic Pulse Motor
Control 0 to 500 Pulse by 1 Pulse
Refrigerant Flow Control
Precise Control
Pulse Motor
Needle
Specifications
Items Specifications
Type EKV Series or CAM Series
Refrigerant Used R22 or R407C
Working Temperature Range -30
o
C to 65
o
C/ -30
o
C to 60
o
C (Operating Time of Coil: less than 50%)
Mounting Direction Drive Shaft in Vertical Direction within an Angle of 45
o
as Maximum
Flow Direction Reversible
Drive Method 4-Phase Pulse Motor Method
Rated Voltage DC12V
+1.8V
Drive Condition 83PPS (Pulse Width at ON: 36mm sec, OFF: 60mm sec)
1, 2 Phase Excitation
Coil Resistance
(each Phase)
46Ω
+10% (at 20
o
C)
Wiring Diagram,
Drive Circuit and
Activation Mode
DC12V
Wiring
Diagram
Drive
Circuit
M
ON
OFF
A
Valve
Close Open
Activation
B
A
B
AB
A
B
A
B
AB
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