Daikin BPMK928B42, Service Manual

Page: 189 / 410

Flow of Refrigerant Si18-201
176 Flow of Refrigerant
1.5 Low Outside Air Temperature Cooling
THERMIST
OR
LIQ
UID PIPE
OUTDOOR UNIT
M
OTO
R
M
OTO
R
DC F
A
N
DC F
A
N
DISTRIB
UT
OR
( DEL
)
PR
OPELLER
PR
OPELLER M M
FA
N
FA
N
REFRIGERANT FLO
W
THERMIST
OR
( DO
A
)
OUTDOOR TEMP
ARA
TURE
HEA
T EXCHANGER
COOLING
HEA
T EXCHANGER
( DE
)
THERMIST
OR
DISCHARGE PIPE
COMPRESSOR THERMIST
OR
HEADER
OIL SEP
ARA
T
O
R
FIL
TER
( DO
)
ELECTR
ONIC
EXP
ANSION V
A
LV
E
FIL
TER
ELECTR
ONIC
EXP
ANSION V
A
LV
E
EV
G
FIL
TER
LO
W PRESSURE
EV
L
4-W
A
Y
V
A
LV
E
FIL
TER
SENSOR
CAPILLAR
Y TUBE
FIL
TER
SP
HIGH PRESSURE
SWITCH
HPS
ELECTR
ONIC
EXP
ANSION V
A
LV
E
A
CCUMULA
T
O
R
CAPILLAR
Y TUBE
CHECK V
A
LV
E
FIL
TER
EV
P
FIL
TER
FLEXIBLE
TUBE
FIL
TER
FIL
TER
CHECK V
A
LV
E
SUCTION PIPE
THERMIST
OR
LIQ
UID LINE
ST
OP V
A
LV
E
GAS LINE ST
OP V
A
LV
E
( DS
)
RECEIVER
EXP
ANSION V
A
LV
E
(BYP
ASS
)
FIL
TER
FIL
TER
ELECTR
ONIC
EV
H
EXP
ANSION V
A
LV
E
(R
OOM A
)
EXP
ANSION V
A
LV
E
(R
OOM B
)
EXP
ANSION V
A
LV
E
(R
OOM C
)
ELECTR
ONIC
ELECTR
ONIC
ELECTR
ONIC
EV
C
EV
B
EV
A
FIL
TER
FIL
TER
FIL
TER
THERMIST
OR
(DGC
)
THERMIST
O
R
(DGB
)
THERMIST
O
R
(DGA
)
THERMIST
OR
(DLC
)
THERMIST
OR
(DLB
)
THERMIST
OR
(DLA
)
GAS SIDE GAS SIDE GAS SIDE
LIQ
U
ID SIDE
LIQ
U
ID SIDE
LIQ
U
ID SIDE
EXP
ANSION V
A
LV
E
(BYP
ASS
)
FIL
TER
FIL
TER
ELECTR
ONIC
EV
H
EXP
ANSION V
A
LV
E
(R
OOM A
)
EXP
ANSION V
A
LV
E
(R
OOM B
)
ELECTR
ONIC
ELECTR
ONIC
EV
A
EV
B
FIL
TER
FIL
TER
THERMIST
OR
(DLA
)
THERMIST
OR
(DLB
)
THERMIST
O
R
(DGA
)
THERMIST
O
R
(DGB
)
GAS SIDE GAS SIDE
LIQ
U
ID SIDE
LIQ
U
ID SIDE
EXP
ANSION V
A
LV
E
(BYP
ASS
)
FIL
TER
FIL
TER
ELECTR
ONIC
EV
H
EXP
ANSION V
A
LV
E
(R
OOM A
)
EXP
ANSION V
A
LV
E
(R
OOM B
)
ELECTR
ONIC
ELECTR
ONIC
EV
A
EV
B
FIL
TER
FIL
TER
THERMIST
OR
(DLA
)
THERMIST
OR
(DLB
)
THERMIST
OR
(DGA
)
THERMIST
OR
(DGB
)
GAS SIDE GAS SIDE
LIQ
UID SIDE
LIQ
UID SIDE
FIELD PIPING
FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
A
N MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
O
CO F
A
N
F
AN MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
AN MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
AN MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
A
N MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING
FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
A
N MO
T
O
R
M
HEA
T EXCHANGER
FIELD PIPING FIELD PIPING
(
CuT
)
(6.4CuT
)
SIRR
OCO F
A
N
F
AN MO
T
O
R
M
HEA
T EXCHANGER
BP UNIT
(M1303)
Productiv
e oper
ation patter
ns
Cooling 1-room oper
ation (2.5kW
, 1-room oper
ation with lo
w outside air temper
ature)
A pressure diff
erence m
ust be k
ept in cooling mode with lo
w outside temper
ature in order
to maintain the compressor reliability
. T
o
ensure such pressure diff
erence
, k
eep the EVL
fully open and let the refr
iger
ant sta
y in the outdoor heat e
xchanger
.
System control motor
iz
ed v
alv
e :
EV
G
Each room distr
ib
ution control motor
iz
ed v
alv
e :
EVU
H
EVL
SC control (Not fully closed)
H
EVP
F
reez
e-up protection control
H
EV
G
T
arget discharge pipe temper
ature
control
EVU
SH control
EVT
Full close
EVH
Full close
"ON"
"OFF" "OFF" "OFF" "OFF" "OFF"
"ON"
: High pressure liquid refr
iger
ant
: High pressure high temp
. gas refr
iger
ant
: Lo
w pressure lo
w temp
. liquid or gas refr
iger
ant