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Normal Control
SiUS30-1301
54
Function and Control
Three condensin
g
units installation
D
GR < 0
D
GR > 0
Master
u
nit
Master
u
nit
Master
u
nit
Master
u
nit
Master
u
nit
Master
u
nit
Master
u
nit
Master
u
nit
OFF
(Condenser)
Sla
v
e
u
nit 1
OFF
(Condenser)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
OFF
(Condenser)
Control of heat exchange
capacity
b
alance
OFF
(Condenser)
Sla
v
e
u
nit 1
OFF
(Condenser)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
OFF
(Condenser)
0 p
u
lse
OFF
(Condenser)
Sla
v
e
u
nit 1
O
N
(E
v
aporator)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
O
N
(E
v
aporator)
OFF
(Condenser)
Sla
v
e
u
nit 1
O
N
(E
v
aporator)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
O
N
(E
v
aporator)
OFF
(Condenser)
Sla
v
e
u
nit 1
O
N
(E
v
aporator)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
O
N
(E
v
aporator)
Control of heat exchange
capacity
b
alance
O
N
(E
v
aporator)
Sla
v
e
u
nit 1
OFF
(Condenser)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
OFF
(Condenser)
O
N
(E
v
aporator)
Sla
v
e
u
nit 1
O
N
(E
v
aporator)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
O
N
(E
v
aporator)
O
N
(E
v
aporator)
Sla
v
e
u
nit 1
O
N
(E
v
aporator)
Fo
u
r-
w
ay
v
al
v
e for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion
v
al
v
e [Y1E]
Control of heat exchange
capacity
b
alance
Control of heat exchange
capacity
b
alance
Sla
v
e
u
nit 2
O
N
(E
v
aporator)
Control of heat exchange
capacity
b
alance
N
ote 1:
D
GR = Target of heat exchange
capacity
b
alance – Act
u
al
meas
u
rement of heat
b
alance
D
GR > 0: Ins
u
fficient e
v
aporation
(Excessi
v
e condensation)
D
GR < 0: Ins
u
fficient condensation
(Excessi
v
e e
v
aporation)
2: Control of heat exchange capacity
b
alance
Control the electronic expansion
v
al
v
e so that Te or Tc
w
ill o
b
tain the
target
v
al
u
e.
0 p
u
lse
0 p
u
lse
0 p
u
lse
0 p
u
lse
0 p
u
lse
0 p
u
lse
D
GR > 0
D
GR < 0
D
GR > 0
D
GR < 0
D
GR > 0
D
GR < 0
D
GR > 0
D
GR < 0
D
GR > 0
D
GR < 0
D
GR > 0
D
GR < 0