– 11 –
Fan characteristics
◆
No filter
AP007, AP009
AP012
AP015
AP018
200 220 240 260 280 300 320 340 360 380 400
0.000
0.050
0.100
0.150
0.200
0.250
Standerd air flow rate: 317.8 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
Ex
te
rn
al
st
at
ic
pre
ss
ure (
in.
W
G
)
Air flow rate (cfm)
Ai
r fl
ow
r
a
te l
o
w
e
r l
im
it
Ai
r fl
ow rate upp
er l
imi
t
High (0.20 in.WG)
High (0.14 in.WG)
High (0.08 in.WG)
Low (0.20 in.WG)
Low (0.14 in.WG)
Low (0.80 in.WG)
220 240 260 280 300 320 340 360 380
420
400
0.000
0.050
0.100
0.150
0.200
0.250
Standerd air flow rate: 353.1 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
Ex
te
rn
al
st
at
ic
pre
ss
ure (
in.
W
G
)
Air flow rate (cfm)
Ai
r fl
ow
r
a
te l
o
w
e
r l
im
it
Ai
r fl
ow rate upp
er l
imi
t
High (0.20 in.WG)
High (0.14 in.WG)
High (0.08 in.WG)
Low (0.20 in.WG)
Low (0.14 in.WG)
Low (0.80 in.WG)
260 280 300 320 340 360 380
480
400 420 440 460
0.000
0.050
0.100
0.150
0.200
0.250
Standerd air flow rate: 406.1 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
Ex
te
rn
al
st
at
ic
pre
ssu
re
(
in.
W
G
)
Air flow rate (cfm)
Ai
r f
low rat
e
lower
li
mi
t
Ai
r fl
ow rate
upper l
imi
t
High (0.20 in.WG)
High (0.14 in.WG)
High (0.08 in.WG)
Low (0.20 in.WG)
Low (0.14 in.WG)
Low (0.80 in.WG)
300
480 500 520
320 340 360 380
540
400 420 440 460
0.000
0.050
0.100
0.150
0.200
0.250
Standerd air flow rate: 459.0 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
Ex
te
rn
al
st
at
ic
pre
ssu
re
(
in.
W
G
)
Air flow rate (cfm)
Ai
r f
low rat
e
lower
li
mi
t
Ai
r fl
ow rate
upper l
imi
t
High (0.20 in.WG)
High (0.14 in.WG)
High (0.08 in.WG)
Low (0.20 in.WG)
Low (0.14 in.WG)
Low (0.80 in.WG)
7
Refrigerant piping
CAUTION
When the refrigerant pipe is long, provide support
brackets at intervals of 8’2” to 9’10” (2.5 to 3 m) to clamp
the refrigerant pipe. Otherwise, abnormal sound may be
generated.
Use the flare nut attached with the indoor unit or R410A
flare nut.
Permissible piping length and
height difference
They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the outdoor
unit.
Pipe size
Unit: in (mm)
Connecting refrigerant piping
Flaring
1
Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2
Insert a flare nut into the pipe, and flare the
pipe.
Use the flare nut provided with the unit or the one
used for the R410A refrigerant. The flaring
dimensions for R410A are different from the ones
used for the conventional R22 refrigerant. A new
flare tool manufactured for use with the R410A
refrigerant is recommended, but the conventional
tool can still be used if the projection margin of the
copper pipe is adjusted to be as shown in the
following table.
Projection margin in flaring: B
Unit: in (mm)
Flaring diameter size: A
Unit: in (mm)
* In case of flaring for R410A with the conventional
flare tool, pull it out approx. 0.02” (0.5 mm) more than
that for R22 to adjust to the specified flare size. The
copper pipe gauge is useful for adjusting projection
margin size.
• The sealed gas was sealed at the atmospheric
pressure so when the flare nut is removed, there will
no “whooshing” sound: This is normal and is not
indicative of trouble.
• Use two wrenches to connect the indoor unit pipe.
Model MMD-
Pipe size
Gas side
Liquid side
AP007 to AP012
3/8” (9.5)
1/4” (6.4)
AP015 to AP018
1/2” (12.7)
1/4” (6.4)
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
1/4” to 1/2”
(6.4 to 12.7)
0 to 0.02”
(0 to 0.5)
0.04” to 0.06”
(1.0 to 1.5)
Outer dia. of copper pipe
A
+0
–0.02” (0.4)
1/4” (6.4)
0.36” (9.1)
3/8” (9.5)
0.52” (13.2)
1/2” (12.7)
0.65” (16.6)
B
A
Work using double spanner
21-EN
22-EN
+00EH99885401.book Page 11 Friday, March 2, 2012 11:01 AM
