Si18-201 Flow of Refrigerant
Flow of Refrigerant 189
1.18 1-Room Operation — Indoor Unit with Large Capacity
(Heating)
THERMISTOR
LIQUID PIPE
OUTDOOR UNIT
MOTOR
MOTOR
DC FAN
DC FAN
DISTRIBUTOR
(
DEL
)
PROPELLER
PROPELLER
M
M
FAN
FAN
REFRIGERANT FLOW
THERMISTOR
(
DOA
)
OUTDOOR TEMPARATURE
HEAT EXCHANGER
HEATING
HEAT EXCHANGER
(
DE
)
THERMISTOR
DISCHARGE PIPE
COMPRESSOR
THERMISTOR
HEADER
OIL
SEPARATOR
FILTER
(
DO
)
ELECTRONIC
EXPANSION VALVE
FILTER
ELECTRONIC
EXPANSION VALVE
EV
G
FILTER
LOW PRESSURE
EV
L
4-WAY VALVE
FILTER
SENSOR
CAPILLARY TUBE
FILTER
SP
HIGH PRESSURE
SWITCH
RECEIVER
HPS
ELECTRONIC
EXPANSION VALVE
ACCUMULATOR
CAPILLARY TUBE
CHECK VALVE
FILTER
EV
P
FILTER
FLEXIBLE
TUBE
FILTER
FILTER
CHECK VALVE
SUCTION PIPE
THERMISTOR
LIQUID LINE
STOP VALVE
GAS LINE
STOP VALVE
(
DS
)
EXPANSION VALVE
(
BYPASS
)
FILTER
FILTER
ELECTRONIC
EV
H
EXPANSION VALVE
(
ROOM A
)
EXPANSION VALVE
(
ROOM B
)
EXPANSION VALVE
(
ROOM C
)
ELECTRONIC
ELECTRONIC
ELECTRONIC
EV
C
EV
B
EV
A
FILTER
FILTER
FILTER
THERMISTOR
(
DGC
)
THERMISTOR
(
DGB
)
THERMISTOR
(
DGA
)
THERMISTOR
(
DLC
)
THERMISTOR
(
DLB
)
THERMISTOR
(
DLA
)
GAS SIDE
GAS SIDE
GAS SIDE
LIQUID SIDE
LIQUID SIDE
LIQUID SIDE
EXPANSION VALVE
(
BYPASS
)
FILTER
FILTER
ELECTRONIC
EV
H
EXPANSION VALVE
(
ROOM A
)
EXPANSION VALVE
(
ROOM B
)
ELECTRONIC
ELECTRONIC
EV
A
EV
B
FILTER
FILTER
THERMISTOR
(
DLA
)
THERMISTOR
(
DLB
)
THERMISTOR
(
DGA
)
THERMISTOR
(
DGB
)
GAS SIDE
GAS SIDE
LIQUID SIDE
LIQUID SIDE
EXPANSION VALVE
(
BYPASS
)
FILTER
FILTER
ELECTRONIC
EV
H
EXPANSION VALVE
(
ROOM A
)
EXPANSION VALVE
(
ROOM B
)
ELECTRONIC
ELECTRONIC
EV
A
EV
B
FILTER
FILTER
THERMISTOR
(
DLA
)
THERMISTOR
(
DLB
)
THERMISTOR
(
DGA
)
THERMISTOR
(
DGB
)
GAS SIDE
GAS SIDE
LIQUID SIDE
LIQUID SIDE
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
M
HEAT EXCHANGER
M
M
M
M
M
M
BP UNIT
(M1316)
Productive operation patterns
Heating 1-room operation (with large indoor unit capacity)
Conditions
(1) In capacity control : Capacity control range : (small)
(when the operating frequency droops to the minimum frequency by the protective
function of high pressure control system)
In case the peak-cut control stays within the drooping zone even when the operating
frequency becomes the lower limit frequency, increasing the opening of EVG motorized
valve increases the condensing capacity of auxiliary heat exchanger and conducts EVG
control to stabilize the unit operation at the no-change zone.
As the surplus refrigerant is treated with the receiver, opening EVL dwells the liquid
refrigerant In the receiver.
With opened EVG, the entire system control (suction overheat) is conducted by the
adjustment of the surplus refrigerant in the receiver via EVL.
BP motorized valve is exclusively used for the distribution control. EVU and EVT are
operated by SC control.
System control motorized valve : EVL (EVT)
Each room distribution control motorized valve : EVU
H
EVG High pressure system control
H
EVL Target discharge pipe temperature
control
EVP Full close
EVU SC control
(+ Target discharge pipe temperature
control)
H
EVT Target discharge pipe temperature
control
EVH Full close
"OFF"
"OFF"
"OFF"
"OFF"
"OFF"
"ON"
"OFF"
: High pressure liquid refrigerant
: High pressure high temp. gas refrigerant
: Low pressure low temp. liquid or gas refrigerant
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(
6.4CuT
)
SIRROCO FAN
FAN MOTOR
HEAT EXCHANGER
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