Refrigerant Piping - Mitsubishi Electric PAC-MK51BC Installationshandbuch

4. Dimensions and required servicing space of Branch Box
(mm)
(1)
B
50 450 250
Fig. 4-6
Fig. 4-8
Fig. 4-9
(3)
G
Min. 250
Fig. 4-10
(mm)
Fig. 4-11

5. Refrigerant piping

* Always follow the specifi cations written in the installation manual of the outdoor unit. Exceeding these requirements may cause reduced performance of the equipment,
and malfunctions.
6
(2)
C
A
*1
250 278 250
D E
180-200
*3
Fig. 4-7
E D
450
450
Fig. 4-12
(mm)
*2
(mm)
4.2. Space required for installation and servicing
1. The space when installing with the suspension bolts.
(1) Front View (Fig. 4-6)
A
(mm) Branch box
B
On the side of piping
(2) Side View (Fig. 4-7, Fig. 4-8, Fig. 4-9)
C
For indoor installations
D
Ceiling board
E
Maintenance hole
F
Reactor Box (Optional parts)
*1: Minimum 350 mm is required for 90° bends in refrigerant piping.
*2: is "Min. 200 mm" <recommendation>.
In the case of less than 200 mm (for example
of Branch box from a maintenance hole becomes diffi cult (Only exchange work
(mm)
of a PCB, linear expansion valve coils and sensors are possible).
To install the optional Reactor Box, set
(Fig. 4-9).
*3: is " 600 mm" <recommendation>.
In the case of " 450 mm", prepare a maintenance hole at a PCB side (as it is
shown in Fig. 4-8, Fig. 4-9), and "Min. 300 mm" is needed as distance
In the case of less than 300 mm (for example
of Branch box, linear expansion valve coils and sensors from a maintenance
hole becomes diffi cult (Only exchange work of a PCB is possible).
(3) Top View (Fig. 4-10)
G
Refrigerant piping
(mm)
2. The space when installing on the fl oor. (Fig. 4-11)
3. The space when installing on a wall. (Fig. 4-12)
The installation direction is limited when installing on a wall. (Fig. 4-13)
When installing the unit on the wall, install the piping connected to the outdoor
unit facing down. Other ways are not acceptable.
NO NO
YES NO
Fig. 4-13
is 100 mm), the exchange work
to Min. 270 mm <recommendation>
is 100 mm), the exchange work
.