Refrigerant Piping - Mitsubishi Electric PAC-AK50BC Manuel D'installation

4. Dimensions and Required Servicing Space of Branch Box
I PAC-AK30BC (3-branches type)
450
205
B
C B A
C B A
25 25 25 21
75 75
(1)
A
B
450
Min.
Min.
250
50
Fig. 4-4
Fig. 4-6
(3)
G
H
Min. 250
Fig. 4-7

5. Refrigerant piping

* Always follow the specifications written in the installation manual of the outdoor unit. Exceeding these requirements may cause reduced performance of the
equipment, and malfunctions.
4
A
320
12
91 95 280 39
73 61 79 50 34
G
E
200
H
F
23
C
D
Fig. 4-3
(2)
C
*1
Min. Min.
250
250
280
180-200
B
*3
D
Fig. 4-5
F
D
E
450
I PAC-AK30BC (Fig. 4-3)
Suspension bolt: W3/8 (M10)
(mm)
Refrigerant pipe flared connection
A
Liquid pipe ø6.35
Gas pipe ø9.52
Drain hose size: O.D.20 (VP16)
I
J
K
4.1. Space required for Installation and servicing
(1) Front View (Fig. 4-4)
A Branch box
B On the side of piping
(2) Side View (Fig. 4-5, Fig. 4-6)
C For indoor installations
D Ceiling board
E Maintenance hole
A
F PCB side
E *1: A minimum 350 mm is required for 90° bends in refrigerant piping.
*2:Å is "Min. 200 mm" <recommendation>.
(Premise: The slope of drain piping is securable 1/100 or more. Required 200 mm or
more, when not securable.)
In the case of less than 200 mm (for example Å is 100 mm), the exchange work of Branch
box from a maintenance hole becomes difficult (Only exchange work of a PCB, linear expan-
sion valve coils, sensors and drain pan is possible).
*3:ı is " 600" <recommendation>.
In the case of "
Fig. 4-6), and "Min. 300 mm" is needed as distance Å.
In the case of less than 300 mm (for example Å is 100 mm), the exchange work of Branch
box, linear expansion valve coils, sensors, and drain pan from a maintenance hole becomes
difficult (Only exchange work of a PCB is possible).
(3) Top View (Fig. 4-7)
G Refrigerant piping
H When facing in the opposite direction to the refrigerant piping.
B C
ø6.35 ø6.35
ø9.52 ø9.52
450", prepare a maintenance hole at a PCB side (as it is shown in
To outdoor unit
ø9.52
ø15.88