Refrigerant Piping - Mitsubishi Electric PAC-MKA50BC Installation Manual

4. Dimensions and required servicing space of Branch Box
(inch)
(1)
A
B
Fig. 4-6
Fig. 4-8
(3)
G
Fig. 4-9
(inch)
Fig. 4-10
NO
YES
Fig. 4-12

5. Refrigerant piping

* Always follow the speci cations written in the installation manual of the outdoor unit. Exceeding these requirements may cause reduced performance of the equipment,
and malfunctions.
6
(inch)
(2)
C
*2
*1
D E
*3
Fig. 4-7
(inch)
E D
(inch)
(inch)
Fig. 4-11
NO
NO
4.2. Space required for installation and servicing
1. The space when installing with the suspension bolts.
(1) Front View (Fig. 4-6)
A
Branch box
B
On the side of piping
(2) Side View (Fig. 4-7, Fig. 4-8)
C
For indoor installations
D
Ceiling board
E
Maintenance hole
*1: Minimum 13-3/4 inch (350 mm) is required for 90° bends in refrigerant piping.
*2: is " Min. 7-7/8 inch (200 mm)" <recommendation>.
(Premise: The slope of drain piping is securable 1/100 or more. Required
7-7/8 inch (200 mm) or more, when not securable.)
In the case of less than 7-7/8 inch (200 mm) (for example
mm)), the exchange work of Branch box from a maintenance hole becomes dif-
cult (Only exchange work of a PCB, linear expansion valve coils and sensors
are possible).
*3: is " 23 - 5/8 inch (600 mm)" <recommendation>.
In the case of " 17-3/4 inch (450 mm)", prepare a maintenance hole at a PCB
side (as it is shown in Fig. 4-8), and "Min. 11-13/16 inch (300 mm)" is needed as
distance .
In the case of less than 11-13/16 inch (300 mm) (for example
mm)), the exchange work of Branch box, linear expansion valve coils and
sensors from a maintenance hole becomes dif cult (Only exchange work of a
PCB is possible).
(3) Top View (Fig. 4-9)
G
Refrigerant piping
2. The space when installing on the oor. (Fig. 4-10)
3. The space when installing on a wall. (Fig. 4-11)
The installation direction is limited when installing on a wall. (Fig. 4-12)
When installing the unit on the wall, install the piping connected to the outdoor
unit facing down. Other ways are not acceptable.
is 4 inch (100
is 4 inch (100