[3-7 Functions of the Major Components of BC Controller ]
14
-
chapter 3
HWE18220_GB
3 Major Components, Their Fu
nctions and Refrigerant Circuits
(2) JA type
Part name
Symbols
(functions)
Part
code
Usage
Specifications
Check method
Pressure
sensor
PS1
(High pres-
sure side)
1) Detects high pressure
2) LEV control
PS3
(Intermedi-
ate pres-
sure)
1) Detects intermediate
pressure
2) LEV control
Thermistor
TH11
(Liquid inlet
tempera-
ture)
LEV control
(Liquid level control)
0°C[32°F] : 15 k
ȍ
10°C[50°F] :9.7 k
ȍ
20°C[68°F] :6.4 k
ȍ
25°C[77°F] :5.3 k
ȍ
30°C[86°F] :4.3 k
ȍ
40°C[104°F] :3.1 k
ȍ
TH12
(Bypass
outlet tem-
perature)
LEV control (Superheat)
TH15
(Bypass in-
let tempera-
ture)
LEV control (Superheat)
TH16
(Liquid re-
frigerant
tempera-
ture)
LEV control (Subcool)
Solenoid
valve
SVM1
Opens during cooling and de-
frost modes
AC208-230V
Open while being powered/
closed while not being pow-
ered
Continuity
check with a
tester
SVM1b
Opens during cooling and de-
frost modes
SVA
Provides refrigerant to indoor
unit in cooling operation
SVB
Provides refrigerant to indoor
unit in heating operation
SVC
Provides refrigerant to indoor
unit in cooling operation
LEV
LEV1
1) Liquid level control
2) Pressure differential con-
trol
3) Subcool control
DC12V
Opening of a valve driven by a
stepping motor
41 - 3000 pulses
Same as
indoor LEV
LEV3
LEV4
Pressure
0~4.15 MPa [601psi]
Vout 0.5~3.5V
0.071V/0.098 MPa [14psi]
Pressure [MPa]
=1.38 x Vout [V]-0.69
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Con-
nector
PS1
1
1 2 3
2
3
R = 15k
0
R = 3460
R = 15
0/80
t
3460
273 t
1
273
1
exp
Содержание PURY-HP144
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