Airwell AWAU-YED076-H13, Service Manual

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REFRIGERATION DIAGRAMS
10-2 SM DED 1-A.1 GB
Function description for each component:
No. Name Main Function
1 Compressor Adjusts its own rotational speed
based on the actual requirement of the
system to implement capacity control.
2 Compressor
heat tape
Maintains a proper oil temperature in
the compressor when the compressor
is in standby status, ensuring the
reliability during compressor startup.
3 Compressor
casing-top
temperature
sensor
Detects a compressor's exhaust gas
temperature for compressor control
and protection.
4 Exhaust pipe
temperature
sensor of
compressor
Detects a compressor's exhaust gas
temperature for compressor control
and protection.
5 High-pressure
circuit breaker
Protects a compressor by sending
feedback signal to stop the system
when the compressor’s discharge
temperature exceeds the operating
value of high-pressure circuit breaker.
6 Oil extractor Separates the gas and oil in the
system to ensure compressor
reliability.
7 Oil equalizing
device
Equalizes the oil for all modules in the
case of excess oil in the current
module when multiple modules are
arranged in parallel, thus ensuring the
system reliability.
8 Heat tape of oil
equalizing
device
Maintains a proper oil temperature in
the compressor when the compressor
is in standby status, ensuring the
reliability of compressor startup.
9 One-way valve Prevents high-pressure gas from
entering the compressor and fast
balances the suction pressure and
discharge pressure in a compressor.
10 High-pressure
sensor
Detects the high pressure value in the
system in real time mode for
compressor protection and other
control functions.
11 Four-way valve Used for the switching between the
cooling and heating functions of
system IDU.
12 Heat
exchanger
Used for outdoor heat exchange.
13 Fan Strengthens heat exchanging.
14 Defrosting
temperature
sensor
Used for defrosting detection.
15 Electronic
expansion valve
for heating
Controls refrigerant adjustment in
heating mode.
16 One-way valve Controls refrigerant flow direction.
17 Sub cooler
electronic
expansion valve
Controls the degree of sub cooling of
tube refrigerant when the system is
running in cooling mode, and reduces
the capacity loss on pipes.
18 Sub cooler Controls the degree of sub cooling of
tube.
No. Name Main Function
19 Liquid outlet
temperature
sensor of sub
cooler
Detects tube temperature.
20 Inlet
temperature
sensor of gas-
liquid separator
Detects the inlet temperature of gas-
liquid separator to prevent the system
from running when the refrigerant
flows back to the compressor.
21 Gas outlet
temperature
sensor of sub
cooler
Detects gas temperature of sub
cooler.
22 Low-pressure
sensor
Detects system low pressure to avoid
extra-low operating pressure.
23 Gas-liquid
separator
Separate gas and liquid to prevent the
system from running when the
refrigerant flows back to the
compressor.
24 Outlet
temperature
sensor of gas-
liquid separator
Detects internal status of gas-liquid
separator to further control the
compressor suction performance.
25 Oil equalizing
valve 1
Used for oil equalizing control among
modules.
26 One-way valve Used for oil equalizing control among
modules and avoid reverse flow of oil.
27 Unloading
valve
Avoids over-high pressure caused by
pipeline blind spot.
28 Oil equalizing
valve 2
Used for oil equalizing control among
modules.
29 Filter Prevents impurities from entering
components and parts.
30 Capillary tube Supports flow regulating and pressure
reduction.
31 Liquid valve Stop valve, closed when the unit is
delivered from the factory and will be
opened after installation.
32 Air valve Stop valve, closed when the unit is
delivered from the factory and will be
opened after installation.
33 Low-pressure
measurement
valve
Detects the low pressure value or
charges refrigerant during system
running.
34 Oil balance
valve
Stop valve, closed when the unit is
delivered from the factory and will be
opened after installation.
35 Oil check valve Checks the quality of refrigerating
machine oil of compressor during
maintenance.
36 Unloading
valve
Avoid over-high pressure caused by
pipeline blind spot.
37 Air by-pass
valve
Avoids extra-high or low operating
pressure.
38 Pressure-
balanced valve
Ensures success startup of
compressor.