Installation Work; Piping Connection Size - Hitachi MC-20AN Installation Manual

INSTALLATION MANUAL
FOR MULTI-KITS

4. INSTALLATION WORK

4.1. PIPING CONNECTION SIzE

The ends of the multi-kits are finished as shown in the following
figures. Cut the end of the pipe to meet with the pipe size.
Model
MC-20AN
MC-21AN
ID31.75
ID38.1
A
MC-30AN
A: To Indoor unit
B: To Outdoor unit
Gas Line
A
A
D
ID25.4
ID28.6
ID31.75
Ø31.75
Ø38.1
A
Ø31.75
ID31.75
B
C: To Piping Connection Kit 1
D: To Piping Connection Kit 2

CAUTION:
Piping shall be supported with adequate space. Bent pipes
and bypass piping (horizontal loop) shall also be installed
in order to absorb piping elasticity caused by temperature
changes.
Liquid Line
ID9.53
ID15.88 ID12.7
ID15.88
ID19.05
Ø19.05
Ø22.2
Ø19.05
ID19.05
B
ID9.53
ID15.88
ID12.7
ID15.88
ID19.05
Ø19.05
Ø22.2
Ø19.05
ID19.05
B
D
ID9.53
ID15.88 ID12.7
ID15.88
ID19.05
Ø19.05
Ø22.2
Ø19.05
ID19.05
B
ID9.53
ID15.88 ID12.7
ID15.88
ID19.05
Ø19.05
Ø22.2
Ø19.05
ID19.05
C
B
P5414715, PMML0206A-rev.2 - 01/2011
Reducer for Gas Line Reducer for Liquid Line
OD25.4
ID25.4
ID22.2
ID19.05
ID22.2 ID19.05
OD22.2
OD19.05
ID15.88
OD31.75
ID31.75
ID28.6
ID25.4
ID25.4
ID28.6
OD31.75
OD31.75
ID31.75
ID28.6
ID25.4
ID31.75 ID28.6
OD31.75
OD31.75
ID31.75
ID28.6
ID25.4
ID25.4
ID28.6
OD31.75
OD31.75
ID28.6
Unit: mm, ID: Inner Diameter, OD: Outer Diameter
OD19.05
ID15.88
ID12.7
ID9.53
OD19.05
ID15.88
ID12.7
ID9.53
OD19.05
ID15.88
ID12.7
ID9.53
OD19.05
ID15.88
ID12.7
ID9.53
OD15.88
ID19.05
2