Daikin REYQ72, Serveice Manual

Page: 47 / 273

Refrigerant Flow for Each Operation Mode SiUS39-602
36 Refirgerant Circuit
Oil Return or Defrost Operation
Indoor unit (Ther
mostat "ON")
F
an OFF
Indoor unit
T
o
other indoor units
" ON " Cooling Heating Heating
Heat e
xchanger
Fa
n
Electronic
∗
e
xpansion v
alv
e
Filter
Filter
Indoor unit
F
an OFF
Indoor unit
" OFF "
Heat e
xchanger
Fa
n
Electronic
∗
e
xpansion v
alv
e
Filter
Filter
Indoor unit (Ther
mostat "ON")
F
an ON
Indoor unit
" ON "
Heat e
xchanger
Fa
n
Electronic
∗
e
xpansion v
alv
e
Filter
Filter
High temper
ature
, high pressure gas
High temper
ature
, high pressure liquid
Lo
w temper
ature
, lo
w pressure liquid or gas
Indoor unit oper
ation
BS unit BS unit BS unit
∗
Electronic e
x
p
.
v
alv
e openning:
Ref
er to page 41~43.
Capillar
y
tube
Three w
ay
va
lv
e
Capillar
y tube
Solenoid v
alv
e
Chec
k v
alv
e
Filter
Capillar
y
tube
Three w
ay
va
lv
e
Capillar
y tube
Solenoid v
alv
e
Chec
k v
alv
e
Filter
Capillar
y
tube
Three w
ay
va
lv
e
Capillar
y tube
Solenoid v
alv
e
Chec
k v
alv
e
Filter
Oil equaliz
er pipe to other outdoor units
Liquid piping to other outdoor units Discharge gas piping to other outdoor units Suction gas piping to other outdoor units