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Refrigerant Circuit
SiBE37-701
64
Refrigerant Circuit
1.5
REMQ14P, 16P (Multi 14, 16HP)
No. in
refrigerant
system
diagram
Symbol
Name
Major Function
1
M1C
Inverter compressor (INV)
Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter,
while Standard compressor is operated with commercial power supply only. The number of
operating steps is as follows when Inverter compressor is operated in combination with Standard
compressor.
Compressor operation steps : Refer to page 104~107.
2
M2C
Standard compressor 1 (STD1)
3
M3C
Standard compressor 2 (STD2)
4
M1F
Inverter fan
Since the system is of air heat exchanging type, the fan is operated at 9-step rotation
speed by using the inverter.
5
M2F
Inverter fan
Since the system is of air heat exchanging type, the fan is operated at 9-step rotation
speed by using the inverter.
6
Y1E
Electronic expansion valve
(Main: EVM)
While in heating operation, PI control is applied to keep the outlet superheated degree
of air heat exchanger constant.
7
Y3E
Electronic expansion valve
(Subcool: EVT)
PI control is applied to keep the outlet superheated degree of subcooling heat
exchanger constant.
8
Y2E
Electronic expansion valve
(Refrigerant charge EVJ)
This is used to open/close refrigerant charge port.
9
Y6S
Solenoid valve (Main bypass SVE)
This opens in cooling operation.
10
Y5S
Solenoid valve (Hot gas: SVP) Used to prevent the low pressure from transient falling.
11
Y4S
Solenoid valve (Refrigerant
regulator liquid pipe SVL)
This is used to collect refrigerant to the refrigerant regulator.
12
Y1S
Solenoid valve (Refrigerant
regulator gas purging pipe SVG)
This is used to collect refrigerant to the refrigerant regulator.
13
Y7S
Solenoid valve (Refrigerant
regulator discharge pipe SVO)
This is used to discharge refrigerant from the refrigerant regulator.
14
Y8S
Solenoid valve (Discharge
pipe of refrigerant regulator)
Bypass the high pressure gas to the refrigerant regulator.
15
Y3S
4 way valve (Heat exchanger
switch 20SA)
This is used to switch outdoor heat exchanger to evaporator or condenser.
16
Y2S
4 way valve (Dual pressure
gas pipe switch 20SB)
This is used to switch dual pressure gas pipe to high pressure or low pressure.
17
S1NPH High pressure sensor
Used to detect high pressure.
18
S2NPL
Low pressure sensor
Used to detect low pressure.
19
S1PH
HP pressure switch (For INV
compressor)
This functions when pressure increases to stop operation and avoid high pressure
increase in the fault operation.
20
S2PH
HP pressure switch (For STD
compressor 1)
21
S3PH
HP pressure switch (For STD
compressor 2)
22
—
Pressure regulating valve
(Liquid pipe)
This is used when pressure increases, to prevent any damage on components caused
by pressure increase in transport or storage.
23
—
Pressure regulating valve
(Refrigerant regulator)
This is used when pressure increases, to prevent any damage on components caused
by pressure increase in transport or storage.
24
—
Subcooling heat exchanger
Apply subcooling to liquid refrigerant.
25
—
Refrigerant regulator
Surplus refrigerant is held according to the operation conditions.
26
—
Capillary tube
Used to return the refrigerating oil separated through the oil separator to the INV compressor.
27
—
Capillary tube
Used to return the refrigerating oil separated through the oil separator to the STD1 compressor.
28
—
Capillary tube
Used to return the refrigerating oil separated through the oil separator to the STD2 compressor.
29
—
Capillary tube
This is used to discharge refrigerant from the refrigerant regulator.
30
R1T
Thermistor (Outdoor air: Ta)
Used to detect outdoor temperature, correct discharge pipe temperature, and others.
31
R8T
Thermistor (Suction pipe: TsA) Used to detect suction pipe temperature.
32
R31T
Thermistor (INV discharge pipe: Tdi)
Used to detect discharge pipe temperature. Used for compressor temperature
protection control.
33
R32T
Thermistor (STD1 discharge pipe: Tds1)
34
R33T
Thermistor (STD2 discharge pipe: Tds2)
35
R4T
Thermistor (Heat exchanger
deicer: Tb)
Used to detect liquid pipe temperature of air heat exchanger. Used to make judgments
on defrosting operation.
36
R2T
Thermistor (Heat exchanger
gas pipe Tg)
This detects temperature of gas pipe for air heat exchanger. Used to exercise the
constant control of superheated degree when an evaporator is used for outdoor unit
heat exchanging.
37
R7T
Thermistor (Heat exchanger
liquid pipe Tf)
This detects temperature of liquid pipe between the air heat exchanger and main
electronic expansion valve. Used to make judgments on the recover or discharge
refrigerants to the refrigerant regulator.
38
R5T
Thermistor (Subcooling heat
exchanger gas pipe: Tsh)
This detects temperature of gas pipe on the evaporator side for the subcooling heat
exchanger. Used to exercise the constant control of superheated degree at the outlet
of supercooled heat exchanger.
39
R6T
Thermistor (Subcooling heat
exchanger liquid pipe Tl)
This detects temperature of liquid pipe between the main expansion valve and
subcooling heat exchanger.
40
R9T
Thermistor (Liquid pipe Tsc)
This detects temperature of liquid pipe between the liquid stop valve and subcooling
heat exchanger.
Summary of Contents for VRV III REYQ8PY1B
Page 1: ...REYQ8 48PY1B R 410A Heat Recovery 50Hz SiBE37 701...
Page 111: ...Refrigerant Flow for Each Operation Mode SiBE37 701 100 Refrigerant Circuit...
Page 252: ...SiBE37 701 Troubleshooting by Remote Controller Troubleshooting 241...
Page 396: ...SiBE37 701 Piping Diagrams Appendix 385 REYQ14P 16P 3D058153B S2NPL S1NPH...
Page 397: ...Piping Diagrams SiBE37 701 386 Appendix REMQ8P 3D057743...
Page 398: ...SiBE37 701 Piping Diagrams Appendix 387 REMQ10P 12P 3D057742...
Page 399: ...Piping Diagrams SiBE37 701 388 Appendix REMQ14P 16P 3D057741...
Page 400: ...SiBE37 701 Piping Diagrams Appendix 389 1 2 Indoor Unit FXFQ P...
Page 405: ...Piping Diagrams SiBE37 701 394 Appendix 1 3 BS Unit 4D057985A...
Page 415: ...Wiring Diagrams for Reference SiBE37 701 404 Appendix FXZQ20M 25M 32M 40M 50MV1...
Page 416: ...SiBE37 701 Wiring Diagrams for Reference Appendix 405 FXCQ20M 25M 32M 63MV3...
Page 417: ...Wiring Diagrams for Reference SiBE37 701 406 Appendix FXCQ40M 50M 80M 125MV3...
Page 420: ...SiBE37 701 Wiring Diagrams for Reference Appendix 409 FXDQ20M 25MV3...
Page 421: ...Wiring Diagrams for Reference SiBE37 701 410 Appendix FXSQ20M 25M 32M 40M 50M 63MV3...
Page 422: ...SiBE37 701 Wiring Diagrams for Reference Appendix 411 FXSQ80M 100M 125MV3...
Page 447: ...Example of connection SiBE37 701 436 Appendix...
Page 453: ...Method of Checking the Inverter s Power Transistors and Diode Modules SiBE37 701 442 Appendix...
Page 467: ...SiBE37 701 iv Index...