Flow of Refrigerant Si18-201
182 Flow of Refrigerant
1.11 Standby Operation (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
(M1309)
Productive operation patterns
On stopping the heating operation
On starting the heating operation
(When the standby operation has not been completed yet before unit operation stop)
Securing the reliability (oil dilution proof in particular) of the compressor by the liquid return
to accumulator when starting the heating operation, the unit drains the refrigerant in the
accumulator, and stagnates the liquid refrigerant in the condenser and receiver after
stopping the heating operation.
Consequently, fully open EVP to evaporate the liquid refrigerant in the accumulator, fully
close each indoor unit motorized valves (EVU / EVT), fully open EVG to feed the liquid
refrigerant in the receiver, and then fully close EVL.
When conducting the equalizing control after completing the standby operation, fully open
each room motorized valves (EVU·EVT) and EVG·EVL, and fully open EVP only for the
equalizing control.
H
EVG Full open
EVL Full close
H
EVP Full open
EVU Full close
EVT Full close
EVH Full close
Full close
Full open
: High pressure liquid refrigerant
: High pressure high temp. gas refrigerant
: Low pressure low temp. liquid or gas refrigerant
"OFF"
"OFF"
"OFF"
"OFF"
"OFF"
"OFF"
"OFF"
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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