-
268
-
'12 • PAC-T-173
Wires for connecting indoor
and outdoor units
Exterior tape
Gas piping
Insulation
Liquid piping
Band (accessor
y)
Pipe cover (accessor
y)
Formula to calculate the volume of additional refrigerant required
7)
Additional
refrigerant
charge
Additional charge volume (kg) = { Main length (m) – Factor
y charged volume 15 (m) } x 0.02 (kg/m)
*When
an
additional
charge
volume
calculation
result
is
negative,
it
is
not
necessar
y
to
charge
refrigerant
additionally
.
8) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
㨯
Improper
heat
insulation/anti-dew
dressing
can
result
in
a
w
ater
leak
or
dripping
causing
damage
to
household
effects,
etc.
(2) Use a heat insulating material that can withstand 120
℃
or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
㨯
All
gas
pipes
must
be
securely
heat
insulated
in
order
to
prevent
damage
from
dripping
water
that
comes
from
the
condensation
formed
on
them
during
a
coo
ling
operation
or
personal
injur
y
from
burns
because
their
sur
face
can
reach
quite
a
high
temperature
due
to
discharged
gas
flowing
inside
during
a
heating
operation.
㨯
Wrap
indoor
units’
flare
joints
with
heat
insulating
parts
(pipe
cover)
for
heat
insulation
(both
gas
and
liquid
pipes).
㨯
Give
heat
insulation
to
both
gas
and
liquid
side
pipes. Bundle
a
heat
insulating
material
and
a
pipe
tightly
together
so
that
no
gaps
may
b
e
left
betwee
n
them
and
wrap
them
together
with
a
connecting
cable
by
a
dressing
tape.
㨯
Both
gas
and
liquid
pipes
need
to
be
dressed
with
20
mm
or
thicker
heat
insulation
materials
above
the
ceiling
where
relative
humidity
exceeds
70%.
●
For an installation measuring 15 m or shorter in pipe length, please charge the refrigerant volume charged for shipment at the
factor
y,
when you recharge refrigerant after ser
vicing etc.
5) Air tightness test
①
Although
outdoor
and
indoor
units
themselves
have
been
tested
for
air
tightness
at
the
factor
y,
check
the
connecting
pipes
after
the
installation
wor
k
for
air
tightness
from
the
operation valve’
s check joint equipped on the outdoor unit side. While conducting a test, keep the operation valve shut all th
e time.
a)
Raise
the
pressure
to
0.5
MPa,
and
then
stop.
Leave
it
for
five
minutes
to
see
if
the
pressure
drops.
b)
Then
raise
the
pressure
to
1.5
MPa,
and
stop.
Leave
it
for
five
more
minutes
to
see
if
the
pressure
drops.
c)
Then
raise
the
pressure
to
the
specified
level
(4.15
MPa),
and
record
the
ambient
temperature
and
the
pressure.
d)
If
no
pressure
drop
is
obser
ved
with
an
installation
pressurized
to
the
specified
level
and
left
for
about
one
day
,
it
is
acceptable.
When
the
ambient
Temperature
fall
1
℃
,
the
pressure
also
fall
approximately
0.01
MPa.
The
pressure,
if
changed,
should
be
compensated
for
.
e)
If
a
pressure
drop
is
obser
ved
in
checking
e)
and
a)
–
d),
a
leak
exists
somewhere.
Find
a
leak
by
applying
bubble
test
liquid
to
welded
parts
and
flare
joi
nts
and
repair
it.
After
repair
,
conduct
an
air
-tightness
test
again.
②
In
conducting
an
air
-tightness
test,
use
nitrogen
gas
and
pressurize
the
system
with
nitrogen
gas
from
the
gas
side.
Do
not
use
a
medium
other
than
nitro
gen
gas
under
any
cir
cumstances.
Gas side operation valve
Check joint
Pressurize
Close
Outdoor unit
Indoor unit
＜
W
ork flow
＞
6) Evacuation
Airtighteness test completed
Fill refrigerant
Vacuum gauge check
Vacuuming
completed
Vacuuming begins
Run
the
vacuum
pump
for
at
least
one
hour
after
the
vacuum
gauge
shows
-101kPa
or
lower
.
(-755mmHg
or
lower)
Confirm
that
the
vacuum
gauge
indicator
does
not
rise
even
if
the system is left for one hour or more.
When
the
system
has
remaining
moisture
inside
or
a
leaky
point,
the
vacuum
gauge
indicator
will
rise.
Check
the
system
for
a
leaky
point
and
then
draw
air
to
create
a
vacuum
again.
(1)
Calculate
a
required
refrigerant
charge
volume
from
the
following
table.
●
This unit contains factory charged refrigerant covering 15m of refrigerant piping and additional refrigerant charge on the
installation site is not required for an installation with up to 15m refrigerant piping.
When refrigerant piping exceeds 15m, additionally charge an amount calculated from the pipe length and the above table
for the portion in excess of 15m.
●
If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size.
For further information, please see “5. UTILIZATION OF EXISTING PIPING.”
0.02
1.50
15
Model 40, 50, 60
Additional charge volume (kg)
per meter of refrigerant piping
(liquid pipe
Ǿ
6.35)
Refrigerant volume charged
for shipment at the factor
y
(kg)
Installation’
s pipe length (m)
covered without additional
refrigerant charge
NOTE
Put down the refrigerant volume calculated from the pipe length onto the caution label attached on
the back side of the service panel.
(2)
Charging refrigerant
●
Since R410A refrigerant must be charged in the liquid phase, you should charge it, keeping the container
cylinder upside down or using a refrigerant cylinder equipped with a siphon tube.
●
Charge refrigerant always from the liquid side service port with the operation valve shut. When you find it
difficult to charge a required amount, fully open the outdoor unit valves on both liquid and gas sides and
charge refrigerant from the gas (suction) side service port, while running the unit in the cooling mode. In
doing so, care must be taken so that refrigerant may be discharged from the cylinder in the liquid phase all
the time.
When the cylinder valve is throttled down or a dedicated conversion tool to change liquid-phase
refrigerant into mist is used to protect the compressor, however, adjust charge conditions so that
refrigerant will
gasify upon entering the unit.
●
In charging refrigerant, always charge a calculated volume by using a scale to measure the charge volume.
●
When refrigerant is charged with the unit being run, complete a charge operation within 30 minutes.
Running the unit with an insufficient quantity of refrigerant for a long time can cause a compressor failure.
Pay
attention
to
the
following
points
in
addition
to
the
above
for
the
R410A
and
compatible machines.
○
To prevent a different oil from entering, assign dedicated tools, etc. to each refrigerant
type. Under no circumstances must a
gauge manifold and a charge hose in particular be shared with other refrigerant types (R22, R407C, etc.).
○
Use a counterflow prevention adapter to prevent vacuum pump oil from entering the
refrigerant
system.
(three-way valve)
Charge hose
(Designed specifically for R410A)
Compound pressure gauge
Pressure gauge
Gauge Manifold
(Designed specifically for R410A)
Handle Hi.
Vacuum pump
Vacuum pump ada
pter
(Anti-reverse flo
w type)
(Designed specifically for R410A)
Charge hose
(Designed specifically for R410A)
Check joint
-0.1MP
a
(-76cmHg)
Handle Lo
Opera
tion V
alve
Opera
tion
Valve
(two-way valve)
Opera
tion V
alve
Ca
p
Opera
tion V
alve
Ca
p
tightening torque (N·m)
Opera
tion valve ca
p
tightening torque (N·m)
Check joint blind nut
φ
6.35 (1/4")
φ
12.7
(1/2")
20
〜
30
10
〜
12
25
〜
35
Opera
tion valve size
(mm)
Securely tighten the opera
tion valve ca
p and the check joint blind nut after adjustment.
Summary of Contents for FDC Series
Page 95: ... 94 12 PAC T 173 Models FDT100VF 125VF 140VF H H H H H C B A F G D G PJF000Z285 ...
Page 98: ... 97 12 PAC T 173 Models FDEN60VF 71VF C 2 C 1 A B A B D C 1 C 2 C 1 C 2 E G F B PFA003Z817 ...
Page 113: ... 112 12 PAC T 173 b Wireless remote controller RCN E1R 60 17 150 Unit mm ...
Page 278: ... 277 12 PAC T 173 ー K ...
Page 346: ... 345 12 PAC T 173 Power PCB 1BSU OVNCFS 4GRNCEG VJG 2 ...
Page 518: ... 517 12 PAC T 173 3 5 SUPER LINK E BOARD SC ADNA E F SL2NA E and SL3N AE BE to control ...
Page 519: ... 518 12 PAC T 173 ...
