Midea V4 Plus User Manual

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04
186 Installation
4.2 Select the Refrigerant Piping Type
Table.4-3
Pipe name
Code (As per the Fig. 4-2)
Main pipe
L1
Indoor unit main pipe
L2~L9
Indoor unit aux. pipe
a, b, c, d, e, f, g, h, i, j
Indoor unit branching pipe assembly
A, B, C, D, E, F, G, H, I
Main unit branching pipe assembly
L, M
Main unit connective pipe
g1, g2, g3, G1
4.3 Size of joint pipes for indoor unit
Capacity of indoor
unit (A)
Size of main pipe(mm)
Available branching
pipe
Gas side
Liquid side
A＜166
Φ15.9
Φ9.5
FQZHN-01D
166≤A＜230
Φ19.1
Φ9.5
FQZHN-01D
230≤A＜330
Φ22.2
Φ9.5
FQZHN-02D
330≤A＜460
Φ28.6
Φ12.7
FQZHN-03D
460≤A＜660
Φ28.6
Φ15.9
FQZHN-03D
660≤A＜920
Φ31.8
Φ19.1
FQZHN-03D
920≤A<1350
Φ38.1
Φ19.1
FQZHN-04D
4.4 Size of joint pipes for main unit
Base on the following tables, select the diameters of the main unit connective pipes. In case of the main
accessory pipe large than the main pipe, take the large one for the selection.
Example: parallel connect with the three main units 10+10+8 (the total capacity is 28HP), all indoor units total
capacity is 812,provided that the equivalent length of all pipes are ≥90m, according to the Table 4-3 the main
pipe diameter areΦ31.8/Φ22.2; in according to all indoor unit capacity 1360, we could find out the master unit
diameter isΦ31.8/Φ19.1 base on Table 4-6. Take the large one for the selection, we final confirm the main pipe
diameter isΦ38.1/Φ22.2.

Midea V4 Plus Specifications

General

Brand	Midea
Model	V4 Plus
Category	Heat Pump
Language	English