Refrigerant Pipe Selection; The First Connecting Method; The Second Connecting Method; Indoor Unit Branch Pipes Selection - Midea Mini VRF Technical & Service Manual

MCAC-VTSM-2016-02

4.3 Refrigerant pipe selection

The first connecting method

The second connecting method

Pipe definition
Main pipe
The main pipes of indoor unit
The branch pipes of indoor unit
Indoor unit branch pipes components
Note: The distance between the first branch to the last indoor unit is more than 15m, choose the second connecting method. The
pipe between the indoor units to the closest branch must be less than 15m.
Table 1: Indoor unit branch pipes selection (a~f)
A: Capacity of indoor units (kW)
A (kW)
A≤4.5
A≥5.6
Note: The maximum length of the branch pipe should not be longer than 15m.
Installation
Outdoor Unit
L2
L1
A
a
The first Line Branch Pipe
Outdoor Unit(Take Model 160 for example)
L
1
A
The first Line Branch Pipe
L5
L4
L3
D
C
B
d
c
b
N
1
(28)
a
L
2
B
N
b
2
(28)
L
3
c
L
4
D
C
d
L
5
E
f
Pipe connecting position
The pipe between outdoor
units to the first branch of
indoor unit.
The pipe after the first branch
does not direct connect with
the indoor unit.
The pipe after the branch
connects with the indoor unit.
The pipes connect with the
main pipe, the branch pipe
and the main pipe of indoor
unit.
Gas Side(Φ)
12.7(Flaring nut)
15.9(Flaring nut)
R410A All DC Inverter Mini VRF
f
E
e
intdoor Units
N
3
(28)
N
4
(28)
e
N
N
5
6
(28)
(22)
Code
L1
L2～L5
a,b,c,d,e,f
A,B,C,D,E
Liquid Side(Φ)
6.4(Flaring nut)
9.53(Flaring nut)
51