Refrigerant Piping - Mitsubishi Electric BRANCH BOX PAC-MKA53BC Instruction Manual

4. Dimensions and required servicing space of Branch Box
(in)
(1)
B
Fig. 4-7
Fig. 4-9
(3)
Fig. 4-10
(in)
Fig. 4-11

5. Refrigerant piping

* Always follow the specifications written in the installation manual of the outdoor unit. Exceeding these requirements may cause reduced performance of the equipment,
and malfunctions.
(2)
C
A
*1
D E
*3
Fig. 4-8
E D
Fig. 4-12
4.3. Space required for installation and servicing
(in)
1. The space when installing with the suspension bolts.
(1) Front View (Fig. 4-7)
A
Branch box
B
On the side of piping
(2) Side View (Fig. 4-8, Fig. 4-9)
*2
C
For indoor installations
D
Ceiling board
E
Maintenance hole
*1: Minimum 13-3/4 in (350 mm) is required for 90° bends in refrigerant piping.
*2: is " Min. 7-7/8 in (200 mm)" <recommendation>.
(in)
In the case of less than 7-7/8 in (200 mm) (for example
exchange work of Branch box from a maintenance hole becomes difficult (Only
exchange work of a PCB, linear expansion valve coils and sensors are possi-
ble).
*3: is " 23 - 5/8 in (600 mm)" <recommendation>.
In the case of " 17-3/4 in (450 mm)", prepare a maintenance hole at a PCB
side (as it is shown in Fig. 4-9), and "Min. 11-13/16 in (300 mm)" is needed as
distance .
In the case of less than 11-13/16 in (300 mm) (for example
mm)), the exchange work of Branch box, linear expansion valve coils and
sensors from a maintenance hole becomes difficult (Only exchange work of a
(in)
PCB is possible).
(3) Top View (Fig. 4-10)
2. The space when installing on the floor. (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)
(in)
When installing on the wall, do not place
the device in the manner shown below.
Doing so may cause electric shock or fire.
is 4 in (100 mm)), the
Correct installation
direction
When installing the unit on
the wall, install the piping
connected to the outdoor
unit facing down. Other ways
are not acceptable.
Fig. 4-13
is 4 in (100
en
6