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Refrigerant Piping - Mitsubishi Electric PAC-MK52BCB Installation Manual

Air-conditioners indispensable optional parts branch box, hfc utilized, r410a, only for r410a outdoor unit, only for indoor use.
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Table of Contents
4. Dimensions and required servicing space of Branch Box
(mm)
(1)
50
450
250
Fig. 4-6
Fig. 4-8
Fig. 4-9
(3)
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
(mm)
(2)
*2
*1
250
278
250
180-200
*3
Fig. 4-7
(mm)
450
(mm)
450
(mm)
(mm)
Fig. 4-12
4.3. 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, 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
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)
2. The space when installing on the fl oor. (Fig. 4-11)
3. The space when installing on a wall. (Fig. 4-12)
Warning:
The installation direction is limited when installing on a wall. (Fig. 4-13)
Correct installation
When installing the unit on
the wall, install the piping
connected to the outdoor
unit facing down. Other ways
are not acceptable.
When installing on the wall, do not place
the device in the manner shown below.
Doing so may cause electric shock or fire.
Fig. 4-13
is 100 mm), the exchange work
to Min. 270 mm <recommendation>
is 100 mm), the exchange work
direction
.

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