SiBE811001EB
Standard Specification
CONVENI-PACK
26
3.7
Description and Layout of Functional Parts and Piping
Diagram
LRYEQ16AY1(E)
No.
Name
Electric
symbol
Function
(1)
Inverter compressor (INV.)
M1C
An inverter-driven compressor, which runs at operating frequencies in the
range of 52Hz to 210Hz. Used mainly for refrigeration.
(2)
Standard compressor
(STD 1)
M2C
A compressor, which runs on a commercial power supply. Used for
refrigeration or air conditioning depending on the situation.
(3)
Standard compressor
(STD 2)
M3C
A compressor, which runs on a commercial power supply. Used mainly for
air conditioning.
(4)
Plate type heat exchanger
—
Removes subcooling of liquid refrigerant for freezing.
(5)
Fan motor
M1F,
M2F
Used to operate a fan for heat exchange through an air heat exchanger.
(6)
Liquid receiver
—
Used to compensate for the variation in handling of refrigerant, thus
providing stable operating conditions at all times.
(7)
Oil separator
—
Refrigerant gas discharged from the compressor contains lubricating oil in
the compressor. If this lubricating oil is present in large quantity, the oil
quantity in the compressor run low, which may result in defective
lubrication. Furthermore, this oil stains the heat transfer surface of the
condenser or evaporator and reduces the effectiveness of the former. To
avoid this, an oil separator is installed in close proximity to the discharge
pipe of the compressor, where oil is separated and collected to return to the
compressor.
(8)
Four way valve (Main)
Y1R
Used to select the passage for Cooling or Heating of the air-conditioner.
(9)
Four way valve (Sub)
Y2R
Used to select the passage for Heat Recovery "Provided" or "Not Provided"
during heating operation.
(10)
Four way valve (Suction)
Y3R
Used to select the passage for Refrigeration or Air conditioning on the
standard compressor.
(11)
Drier
—
Used to remove moisture from the refrigerant. Since components with
particularly low evaporating pressure may cause moisture to freeze at the
needle part of the electronic expansion valve resulting in clogging, this drier
is provided.
(12)
Electronic expansion valve
(Main)
Y1E
Used to keep the suction superheated degree (SH) constant, when the
outdoor unit heat exchanger is used as an evaporator.
(13)
Electronic expansion valve
(Subcooling)
Y2E
Controls injection refrigerant for freezing subcooling.
(14)
Electronic expansion valve
(Oil return)
Y3E
Returns oil and injection refrigerant to the compressor during inverter
compressor operation.
(15)
Electronic expansion valve
(Oil return)
Y4E
Returns oil and injection refrigerant to the compressor during STD
compressor (M2C) operation.
(16)
Electronic expansion valve
(Oil return)
Y5E
Returns oil and injection refrigerant to the compressor during STD
compressor (M3C) operation.
(17)
High pressure switch
S1PH
This switch is activated at a high pressure of 3.8 MPa or more to stop the
INV. compressor (M1C) operation.
(18)
High pressure switch
S2PH
This switch is activated at a high pressure of 3.8 MPa or more to stop the
STD compressor 1 (M2C) operation.
(19)
High pressure switch
S3PH
This switch is activated at a high pressure of 3.8 MPa or more to stop the
STD compressor 2 (M3C) operation.
(20)
Low pressure switch
S1PL
This switch is activated at low pressure of 0.0 MPa or less to stop the STD
compressor 1 (M2C) operation.
(21)
Pressure sensor (high
pressure)
S1NPH1 Used to detect high pressure and control the outdoor unit fan operation.
(22)
Pressure sensor
(intermediate pressure)
S1NPH2 Used to detect intermediate pressure and control the injection quantity.
(23)
Pressure sensor (low
pressure) (refrigeration)
S1NPL1
Used to detect low pressure and control the compressor on the refrigeration
side.
(24)
Pressure sensor (low
pressure) (air conditioning)
S1NPL2
Used to detect low pressure and control the compressor on the air-
conditioning side.
(25)
Pressure regulating valve
(with stop valve)
—
Releases liquid refrigerant to prevent liquid sealing.
(26)
Service port
—
Used for refrigerant recovery and vacuum drying during maintenance.
(27)
Service port
—
Used for refrigerant recovery and vacuum drying during maintenance.
(28)
Gauge port
—
Used to connect the high pressure gauge.