Refrigerant Piping - Toshiba Carrier MMD-AP0074SPH2UL Installation Manual

Fan characteristics
◆ No filter
AP007, AP009
Standerd air flow rate: 317.8 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
0.250
High (0.20 in.WG)
0.200
0.150
High (0.14 in.WG)
Low (0.20 in.WG)
0.100
High (0.08 in.WG)
Low (0.14 in.WG)
0.050
Low (0.80 in.WG)
0.000
200 220 240 260 280 300 320 340 360 380 400
Air flow rate (cfm)
AP015
Standerd air flow rate: 406.1 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
0.250
High (0.20 in.WG)
0.200
High (0.14 in.WG)
0.150
Low (0.20 in.WG)
High (0.08 in.WG)
0.100
Low (0.14 in.WG)
0.050
Low (0.80 in.WG)
0.000
260 280 300 320 340 360 380 400 420 440 460
Air flow rate (cfm)
21-EN
AP012
Standerd air flow rate: 353.1 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
0.250
High (0.20 in.WG)
0.200
High (0.14 in.WG)
0.150
Low (0.20 in.WG)
Low (0.14 in.WG)
High (0.08 in.WG)
0.100
Low (0.80 in.WG)
0.050
0.000
220 240 260 280 300 320 340 360 380
Air flow rate (cfm)
AP018
Standerd air flow rate: 459.0 (cfm)
Dotted line: Upper limit of external static pressure
Lower limit of external static pressure
0.250
High (0.20 in.WG)
0.200
High (0.14 in.WG)
0.150
Low (0.20 in.WG)
High (0.08 in.WG)
0.100
Low (0.14 in.WG)
0.050
Low (0.80 in.WG)
0.000
480 300 320 340 360 380 400 420 440 460 480 500 520
Air flow rate (cfm)
– 11 –
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
Model MMD-
Gas side
AP007 to AP012 3/8" (9.5)
AP015 to AP018 1/2" (12.7)
400 420
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.
540
Projection margin in flaring: B
Outer dia. of
R410A tool used
copper pipe
1/4" to 1/2"
(6.4 to 12.7)
Flaring diameter size: A
Unit: in (mm)
Outer dia. of copper pipe
1/4" (6.4)
Pipe size
3/8" (9.5)
Liquid side
1/2" (12.7)
1/4" (6.4)
1/4" (6.4)
* 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.
Work using double spanner
Unit: in (mm)
Conventional
tool used
0 to 0.02" 0.04" to 0.06"
(0 to 0.5) (1.0 to 1.5)
Unit: in (mm)
A +0
–0.02" (0.4)
0.36" (9.1)
0.52" (13.2)
0.65" (16.6)
A
22-EN