Refrigerant Circuit - Fujitsu Airstage VR-II Series Service Manual

2. OUTDOOR UNIT

2-1 REFRIGERANT CIRCUIT

Outdoor unit
HPSW1
OS
TH1
CMP1
(INV)
SV2
TH11
CMP
ACM
Indoor unit1
TH21
TH24
No. Part name
1 Compressor temp. Sensor 1
2 Discharge temp. Sensor 1
3 High pressure Switch
4 Check valve
5 Oil Separator
6 Compressor (Inverter)
7 Bypass / Oil return Valve
8 Oil return Valve
9 High pressure Sensor
10 Bypass Valve
11 Suction gas temp. Sensor
12 Low pressure Sensor
13 Accumulator
14 4-Way-Valve 1
15 4-Way-Valve 2
16 Service port
17 Heat-Ex 1 gas temp. Sensor
18 Heat Exchanger 1
19 Heat-Ex 2 gas temp. Sensor
20 Heat Exchanger 2
21 Outdoor unit FAN (Motor)
22 Outdoor temp. Sensor
23 Heat-Ex 1 liquid temp. Sensor
24 Heat-Ex 2 liquid temp. Sensor
25 Pressure regulation valve
HPS
TH3
SV1
LPS
ACM
SV3
FAN21
EEV21
TH22
HEX21
Function
Detects the compressor temperature
Detects the discharge temperature
Detects abnormal high pressure 609 psi (4.20 MPa)
Comp. pressure equaization
Separates oil and refrigerant
Operation range ( 20 rps - 115 rps )
HP-LP bypass in protection, Returns the oil to COMP
Returns the oil to Compressor
Detects the High pressure
HP-LP bypass in protection / Comp. pressure equalization
Detects the temp of refrigerant
Detects Low pressure
Collects refrigerant and the returned oil
Changes operation mode of HEX 1
Changes operation mode of HEX 2
Measure High pressure for Service
Detects the temperature of refrigerant
Operates as Condenser / Evaporator
Detects the temperature of refrigerant
Operates as Condenser / Evaporator
Control FAN speed for heat exchange of HEX
Detects the ambient temperature
Detects the temperature of refrigerant
Detects the temperature of refrigerant
Operates in regulated pressure 580 psi (4.00 MPa)
TH7
TH9
4WV 1
HEX1
TH8
TH10
HEX2
4WV 2
FP
FAN1
TH2
: Capillary
RB unit1
SV
D1
SV
B2
SV
SV B1
S1
SV
S2
No.
Part name
26 Outdoor unit EEV1
27 Outdoor unit EEV2
28 Receiver tank
29 Liquid pipe temp. Sensor 1
30 Outdoor unit EEV3
31 Sub-Cool Heat exchanger
Sub-Cool HEX gas outlet temp
32
Sensor
33 Liquid pipe temp. Sensor 2
34 High pressure gas cut valve
35 3way-valve (High pressure Gas)
36 3way-valve (Liquid)
37 3way-valve (Low pressure Gas)
38 Service port
39 I.U HEX outlet temp. Sensor
40 Room temp. Sensor
41 Indoor unit FAN (Motor)
42 I.U Heat Exchanger
43 I.U HEX inlet temp. Sensor
44 Indoor unit EEV
45 SVD1 (Discharge)
46 SVB2 (Pressurization)
47 SVS1 (Suction 1)
48 SVS2 (Suction 2)
49 Check valve
50 SVB1 (Decompression)
02-01
SV4
EEV1
EEV3
RCV
EEV2
TH4
SCHEX TH5
TH6
: Strainer : Fusible plug
FP
Operation temp. 165 F (75 C )
Function
Controls the flow of ref. based on target pressure
Controls the flow of ref. based on target pressure
Storage extra refrigerant
Detects the temperature of liquid refrigerant
Controls ref. subcooling /Operates in protection
Subcool of liquid refrigerant
Detects the temperature of refrigerant
Detects the temperature of liquid refrigerant
Shut off High pressure gas line in all Cooling mode
Open / Close for High pressure Gas line
Open / Close for Liquid line
Open / Close for Low pressure Gas line
Measure Low pressure for Service
Detects the temperature of refrigerant
Detects the temperature of room
Controlled by setting / protection / Thermo OFF
Operates as Condenser / Evaporator
Detects the temperature of refrigerant
Controlled by setting / protection / Thermo OFF
Opens in Heat / Vacuum mode
Opens in Heat / Vacuum mode
Opens in Cool / Dry / Defrost / Oil-Recovery / Vacuum
Opens in Cool / Dry / Defrost / Oil-Recovery / Vacuum
Shut off opposit refrigerant flow
Opens in Stop / FAN / same as the function of SVS
GAS LINE
(High pressure)
LIQUID LINE
GAS LINE
(Low
pressure)