Flow of Refrigerant SiE18-201
126 Flow of Refrigerant
1. Flow of Refrigerant
1.1 Flow of Refrigerant
Operation Mode
No.
Operating Status
: Fixed opening (step)
: Variable opening
●: Fully closed status
The figures in ( ) are
for applicable range.
Excess refrigerant
4-way valve EVP
Discharge
Bypass
Motorized
Valve
EVG
Outdoor Unit
Gas Pipe
Motorized
Valve
EVL
Outdoor Unit
Liquid Pipe
Motorized
Valve
EVA,B,C-
Operating Room
Unit
BP Unit each
Room Motorized
Valve
EVA,B,C- Non-
Operating Room
Unit
BP Unit each
Room Motorized
Valve
EVH BP Unit
Bypass
Motorized
Valve
Cooling/
Heating
changeover
Defrost
control
Oil
collection in
heating
Capacity
linear
control
Equalizing
control
Freeze
protection
control
Peak cut
control
At starting
<Cooling>
Surplus
refrigerant
amount
adjustment
Target
discharge
pipe
temperature
control
<Heating>
Reverse
target
discharge
pipe
temperature
control
Capacity
linear
control
(1-step)
<Cooling>
Subcooling
control
<Heating>
Target
discharge
pipe
temperature
control
Main
reducing
valve
Refrigerant
distribution
control
<Cooling>
Gas pipe
isothermal
control
SH control
<Heating>
Subcooling
control
<Cooling>
Refrigerant
distribution
OFF
<Heating>
Target
discharge
pipe
temperature
control
Main pipe
liquid
stagnation
prevention
control at
starting
Oil return
control
Defrost
control
Cooling
1.2 Standby Operation — OFF 450 pls ● 0 pls 120 pls ● 0 pls ● 0 pls ● 0 pls
1.3
Equalizing Control — OFF 450 pls
52 → 0
pls
450 →
100 pls
● 0 pls ● 0 pls ● 0 pls
1.4
Oil Return
Operation
Main Gas
Pipe Oil
Return
— OFF 0~200
60~100
or 450
100~450
52~450
pls
● 0 pls 450 pls
1.5
Low Outside Air
Temperature
Cooling
2.5kW
1-Room
Operation
NO OFF 0~200
0~100
(EVL=0)
● 0 pls
52~450
pls
● 0 pls ● 0 pls
1.6
All-Room Operation NO OFF ● 0 pls
0~100
(EVL=0)
● 0 pls
52~450
pls
● 0 pls ● 0 pls
1.7
Multi-Room
Operation
NO OFF ● 0 pls
0~100
(EVL=0)
● 0 pls
52~450
pls
● 0 pls ● 0 pls
1.8 (Partial
Loading)
YES OFF ● 0 pls
0~450
(EVL≠0)
12~450
52~450
pls
● 0 pls ● 0 pls
1.9
1-Room
Operation
Indoor Unit
Large
Capacity
YES OFF ● 0 pls
0~450
(EVL≠0)
12~450
52~450
pls
● 0 pls ● 0 pls
1.10
Indoor Unit
Small
Capacity
(2.5 kW)
YES OFF 0~200
0~450
(EVL≠0)
12~450
52~450
pls
● 0 pls ● 0 pls
Heating
1.11 Standby Operation — ON 450 pls 450 pls ● 0 pls ● 0 pls ● 0 pls ● 0 pls
1.12
Equalizing Control — ON 450 pls
450 →
100 pls
● 0 pls ● 0 pls ● 0 pls
0 → 100
→ 0 pls
1.13
Oil return Operation — OFF
450 → 0
→ 150
→ 450
pls
● 0 pls ● 0 pls 190 pls ● 0 pls
0 → 232
→ 0 pls
1.14
Defrost — OFF
450 →
150 →
450 pls
0 → 70
→ 0 pls
450 → 0
pls
190 pls ● 0 pls 100 pls
1.15
All-Room Operation NO ON ● 0 pls ● 0 pls
0~100
(EVG=0)
52~450
pls
52~420
pls
● 0 pls
1.16
Multi-Room
Operation
NO ON ● 0 pls ● 0 pls
0~100
(EVG=0)
52~450
pls
52~420
pls
● 0 pls
1.17 (Partial
Loading)
YES ON ● 0 pls 0~70
0~450
(EVG≠0)
52~450
pls
52~420
pls
● 0 pls
1.18
1-Room
Operation
Indoor Unit
Large
Capacity
YES ON ● 0 pls 0~70
0~450
(EVG≠0)
52~450
pls
52~420
pls
● 0 pls
1.19
Indoor Unit
Small
Capacity
(2.5kW)
YES ON 0~450 0~150
0~450
(EVG≠0)
52~450
pls
52~420
pls
● 0 pls
——Pump Down Operation — OFF 0~450 ● 0 pls
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