Pipe Size; Valve Size For Outdoor Unit; Valve Size For Branch Unit; Different-Diameter Joint (Optional Parts) - Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

Pipe size (Branch box-Indoor unit) *Case of M series or S series Indoor unit
Indoor unit
(kW)
type
Liquid

Pipe size

(mm) Gas
When using 60 type indoor unit of MEXZ series, use the flare nut in the indoor unit accessory for the gas side
connecting of indoor unit.
Do not use the flare nut (gas side) attached to the indoor unit. If it is used, a gas leakage or even a pipe extraction
may occur.
Pipe size (Branch box-Indoor unit) *Case of P series Indoor unit
Indoor unit
(kW)
type
Pipe size
Liquid
(mm)
Gas
When using 35, 50 type indoor unit of P series, use the flare nut (for R410A) attached to the indoor unit.
Do not use the flare nut (for R407C) in the indoor unit accessory. If it is used, a gas leakage or even a pipe
extraction may occur.

(1) Valve size for outdoor unit

For liquid
For gas

(2) Valve size for branch unit

w
Liquid pipe
A UNIT
Gas pipe
w
Liquid pipe
B UNIT
Gas pipe
w
Liquid pipe
C UNIT
Gas pipe
Liquid pipe
D UNIT
Gas pipe
Liquid pipe
E UNIT
Gas pipe
w 3- branch type is only for A, B, and C unit.
Different-diameter joint (optional parts) (Fig.7-1)
Connected pipes diameter
Model name
mm
{9.52
MAC-A454JP
{12.7
MAC-A455JP
{12.7
MAC-A456JP
{6.35
PAC-493PI
{9.52
PAC-SG76RJ-E
22 25
[6.35 [6.35 [6.35
[9.52 [9.52 [9.52
35 50
[6.35 [6.35 [9.52
[12.7 [12.7 [15.88
Diameter A Diameter B
mm mm
{12.7 {9.52 {12.7
{9.52 {12.7 {9.52
{15.88 {12.7 {15.88
{9.52 {6.35 {9.52
{15.88 {9.52 {15.88
35 50 60
[6.35 [6.35
[15.88 w
[12.7
60 71
[9.52
[15.88
[9.52mm
[15.88mm
[6.35 mm
[9.52 mm
[6.35 mm
[9.52 mm
[6.35 mm
[9.52 mm
[6.35 mm
[9.52 mm
[6.35 mm
[12.7 mm
A
Fig.7-1
39
71 80
[9.52 [9.52
[15.88 [15.88
Conversion formula
[6.35mm
1/4 inch
3/8 inch [9.52mm
[12.7mm
1/2 inch
B
[15.88mm
5/8 inch
3/4 inch [19.05mm