Mitsubishi Electric PAC-MK33BC, Technical & Service Manual

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7
OCH664
2-2-2. Space required for Installation and servicing for branch box for PAC-MK53/33BCB
(1) Front View (Fig. 2-6)
A
Branch box
B
On the side of piping
(2) Side View (Fig. 2-7, Fig. 2-8, Fig. 2-9)
C
For indoor installations
D
Ceiling board
E
Maintenance hole
*1:
A minimum 350 mm is required for 90° bends in refrigerant piping.
*2 : A
is “Min. 200 mm” <recommendation>.
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. 2-9)
*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. 2-8, Fig. 2-9), 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. 2-10)
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. 2-10
Fig. 2-8
Fig. 2-7 Fig. 2-6
(3)
Min. 250
(1) (2)
50 450
�
450
250
A
B
E D
250 250.3
170
30
278
180-200
C
D
E
*1
*3
*2
Unit: mm
450
Fig. 2-9