Daikin FXL63LVE [27/56] Explanation of different systems

Daikin FXL63LVE [27/56] Explanation of different systems
• Introduction
5
Systems • Introduction
26
5 Explanation of different Systems
5-4 Inverter heat pump / heat recovery systems
FIELD PIPING CONNECTION
High-efficiency scroll compressor
Conventional compressors were designed to cool a motor with all
incoming refrigerant gas and send it to the compression process. Daikin’s
new scroll compressor separates incoming refrigerant: a gas which is fed
to compressing process through motor in order to cool the motor and a
gas which is fed to compressing process directly. This minimizes loss in
motor section
The refrigerant gas inlet to the compression process is located near the
suction inlet to minimize loss.
New intelligent defrost control
Detection of frosting conditions of a multiple number of heat exchangers
to achieve timely activation of defrost operation.
Newly developed inverter unit
Detailed capacity control in accordance with high-efficiency scroll
compressor operation.
New-type oil separator
Ensures high reliability even with extended piping.
New oil-return operation control
Daikin’s original sensor technology for accurate return of lubrication oil to
compressors.
Twin/triple compressor control
Optimum capacity control of two or three compressors in accordance
with load.
(16~20 HP: twin, 24~30 HP: triple)
Superheat optimization control (indoor unit)
In an indoor unit, liquid refrigerant is heated by a heat exchanger, and it
boils and evaporates, thus changing to a gas state. The refrigerant
temperature is controlled by an electronic expansion valve and thermistor
so the temperature difference between the inlet and outlet stays 5°C.
R-22, a single-component refrigerant remains at a constant temperature
until it changes completely to a gas; therefore, the gas must be
superheated to increase the temperature by 5°C. By contrast, R-407C, a
mixture of three different refrigerants, increases in temperature before it
becomes 7a gas, thus requiring the superheating process to bring up the
temperature by only 2°C. This means more efficient operation of the heat
exchanger.
Suction gas
Suction gas
Motor cooling
Motor cooling
To the suction port (directly)
Suction gas Suction gas
Orbiting scrol
l
Fixed scrol
l
R-407
C
R
-
22
L
G
L
G
L: liquid refrigerant, G: gas refrigeran
t
R-22 refri
g
erant
R-407C refri
erant
Liquid-side thermistor
Exam
p
le:
2
2
C
Liquid-side thermistor
Exam
p
le:
2
2
C
Gas-side
thermisto
r
Exam
p
le:
7
7
C
Gas-side
thermisto
r
Exam
p
le:
7
7
C
Indoor unit heat exchan
g
er
Indoor unit heat exchanger
Electronic ex
p
ansion valv
e
Electronic ex
p
ansion valv
e
Su
p
erheat =
5
5
C
Su
p
erheat =
2
2
C

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