Johnson Controls HVWHP072B32S - Electronic Expansion Valve

(Main Parts)
MAINTENANCE
4-96
SM-18006
4.2.7 Electronic Expansion Valve
Micro-Computer
Pulse Signal
2-2 Phase Permanent Magnetic Pulse Motor
Opening of expansion valve is controlled
by the water source unit PCB1 order.
Refrigerant Flow Control
Precise Control
● Specications for MV1 and MV4
Model PAM-BBOYGHS-1
Working Temperature
Range
-22
o
F to 158
o
F (-30
o
C to 70
o
C)
Refrigerant Used R410A
Insulation Resistance Min. 100MΩ (at 500VDC Megger)
Withstand Voltage 500VAC for 1 Minute or 600VAC for 1 Second
Rated Voltage
DC12V+1.2V
Drive Condition
100 - 200 PPS
2-2 Phase Excitation
Coil Resistance 100
Ω
(at 68
o
F (20
o
C))
Insulation Class Class E
Wiring Diagram,
Drive Circuit and
Activation Mode
< Checking Method >
Measure the coil resistances between Red (common) and each phase.
The measured resistance value is normal if approximately 100
Ω
*
.
*: Ambient Temperature 68
o
F (20
o
C)
Pulse Motor
Needle
φ3
φ1
White (3)
Red (1)
(COM)
Orange (5)
φ2 φ4
Yellow (4)Blue (6)
M
Phase 1 2 3 4
f
1 ON OFF OFF ON
f
2 ON ON OFF OFF
f
3 OFF ON ON OFF
f
4 OFF OFF ON ON
OPEN: 4 3 2 1 4
CLOSE: 1
2 3 4 1