Daikin RXYQ96PYDN, Руководство по обслуживанию

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SiUS34-801A_b Refrigerant Circuit
VRVIII R-410A Heat Pump 60Hz 17
2. Refrigerant Circuit
2.1 RXYQ72P, 96P, 120P
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 45~46.
2 M2C
Standard compressor 1
(STD1)
4 M1F Inverter fan
Since the system is of the outdoor unit 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
the outdoor unit 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)
Opens/closes refrigerant charge port.
9 Y6S
Solenoid valve (Main bypass SVE)
Opens in cooling operation.
10 Y5S Solenoid valve (Hot gas: SVP) Prevents the low pressure from transient falling.
11 Y4S
Solenoid valve (Refrigerant
regulator liquid pipe SVL)
Collects refrigerant to the refrigerant regulator.
12 Y1S
Solenoid valve (Refrigerant
regulator gas purging pipe
SVG)
Collects refrigerant to the refrigerant regulator.
13 Y7S
Solenoid valve (Refrigerant
regulator discharge pipe SVO)
Discharges refrigerant from the refrigerant regulator.
14 Y8S
Solenoid valve (Discharge
pipe of refrigerant regulator)
Bypasses the high pressure gas to the refrigerant regulator.
15 Y3S
4 way valve (Heat exchanger
switch 20SA)
Switches outdoor heat exchanger to evaporator or condenser.
16 Y2S
4 way valve (Dual pressure
gas pipe switch 20SB)
Switches dual pressure gas pipe to high pressure or low pressure.
17 S1NPH High pressure sensor Detects high pressure.
18 S2NPL Low pressure sensor Detects low pressure.
19 S1PH
HP pressure switch (For INV
compressor)
Functions when pressure increases to stop operation and avoid high pressure increase in
the event of a fault.
20 S2PH
HP pressure switch (For STD
compressor 1)
22 —
Pressure regulating valve
(Liquid pipe) Used when pressure increases, to prevent any damage on components caused by
pressure increase in transport or storage.
23 —
Pressure regulating valve
(Refrigerant regulator) Used when pressure increases, to prevent any damage on components caused by
pressure increase in transport or storage.
24 — Subcooling heat exchanger Applies 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.
29 — Capillary tube Used to discharge refrigerant from the refrigerant regulator.
30 R1T Thermistor (Outdoor air: Ta) Detects outdoor temperature, correct discharge pipe temperature, and others.
31 R8T Thermistor (Suction pipe: TsA) Detects suction pipe temperature.
32 R31T
Thermistor (INV discharge
pipe: Tdi)
Detects discharge pipe temperature. Used for compressor temperature protection control.
33 R32T
Thermistor (STD1 discharge
pipe: Tds1)
35 R4T
Thermistor (Heat exchanger
deicer: Tb) Detects liquid pipe temperature of the outdoor unit heat exchanger. Used to make
judgments on defrosting operation.
36 R2T
Thermistor (Heat exchanger
gas pipe Tg)
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)
Detects temperature of liquid pipe between the the outdoor unit 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)
Detects gas pipe temperature on the evaporation side of subcooling heat exchanger. Used
to exercise the constant control of superheated degree at the outlet of subcooled heat
exchanger.
39 R6T
Thermistor (Subcooling heat
exchanger liquid pipe Tl) Detects temperature of liquid pipe between the main expansion valve and subcooling heat
exchanger.
40 R9T Thermistor (Liquid pipe Tsc)
Detects temperature of liquid pipe between the liquid stop valve and subcooling heat
exchanger.