Mitsubishi Electric PAC-MK33BC, Technical & Service Manual

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6
OCH664
2-2. INSTALLATION
2-2-1. Space required for Installation and servicing for branch box for PAC-MK53/33BC
(1) Front View (Fig. 2-1)
A
Branch box
B
On the side of piping
(2) Side View (Fig. 2-2, Fig. 2-3, Fig. 2-4)
C
For indoor installations
D
Ceiling board
E
Maintenance hole
F
Reactor box (Optional parts)
*1:
A minimum 350 mm is required for 90° bends in refrigerant piping.
*2 :
A
is “Min 200 mm”.
In the case of less than 200 mm (for example
A
is 100 mm), the exchange work of branch box from a maintenance hole
becomes difficult (Only exchange work of a PCB, linear expansion valve coils and sensors is possible).
To install the optional reactor box, set
A
to Min 270 mm <recommendation>. (Fig. 2-4)
*3 : B
is “600 mm”
.
In the case of “450 mm”, prepare a maintenance hole at a PCB side (as it is shown in Fig. 2-3, Fig. 2-4), and “Min 300 mm”
is needed as distance
A
.
In the case of less than 300 mm (for example
A
is 100 mm), the exchange work of Branch box, linear expansion
valve coils and sensors from a maintenance hole becomes difficult. Only exchange work of a PCB is possible.
(3) Top View (Fig. 2-5)
NOTE 1: The branch box is only for indoor use.
NOTE 2: Please attach the special optional cover (PAC-AK350CVR-E) to install branch box outdoors.
Fig. 2-5
Fig. 2-3
Fig. 2-2 Fig. 2-1
Unit: mm
(3)
Min 250
(1) (2)
50 450
�
450
250
250 250
170
30
278
180-200
A
C
B
D E
*1
*3
*2
E D
450
E D F
Fig. 2-4