11.4 Electronic expansion valve
Micro-Computer
Precise Control
Control 0 to 500 Pulse by 1 Pulse
2-Phase Permanent Magnetic Pulse Motor
Pulse Signal
Refrigerant Flow Control
1: Pulse motor
2: Needle
Items Specifications
Applicable models Main cycle for RAS-(8-18)FSXN
Type UKV series / EKV series
Refrigerant R410A
Working temperature range -30 °C to 65 °C (Operating time of coil: less than 50%)
Direction of the installation Drive shaft in vertical direction at a 45° angle as maximum
Direction of the flow Reversible
Drive method 4-phase pulse motor method
Rated voltage DC 12 V ± 1.2 V
Drive condition 80 ± 5 PPS (Pulse width at ON: 36 mm sec, OFF: 60 mm sec) 1, 2 phase excitation
Coil resistance (for each phase) 46 Ω ± 3 Ω (at 20 °C)
Wiring diagram, drive circuit and
activation mode
1 : Wiring diagram.
2 : Drive circuit
3 : Valve
4 : Close
5 : Open
6 : Activation
11 Electrical checks of the
main parts
339
SMGB0065 rev. 1 - 12/2010
11
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