Drainage Piping Work; Electrical Work - Mitsubishi Electric MXZ-8A140VA Manuel D'installation

5. Installing the refrigerant piping
I
F
LO HI
G H
A Freon cylinder
B Scale
C Valve
D 3-way joint
E Vacuum pump
F System analyzer
G Lo-knob
Fig. 5-10
Fig. 5-11

6. Drainage piping work

Outdoor unit drainage pipe connection
When drain piping is necessary, use the drain socket or the drain pan (option).
Drain socket
Drain pan

7. Electrical work

[1] Basic systems
OC
BC (5-branch type)
A B C
IC IC IC IC
RC RC
R R
C C
10
J
K
L
M
N
C
D
C
E
A
B
H Hi-knob
I To branch box
J Outdoor unit
K Stop valve
L Liquid pipe or high-pressure pipe
M Gas pipe or low-pressure pipe
N Service port
* The figure to the left is an example only.
The stop valve shape, service port po-
sition, etc., may vary according to the
model.
* Turn section A only.
(Do not further tighten sections A and
B together.)
C Charge hose
D Service port
PAC-SG61DS-E
PAC-SG64DP-E
OC: Outdoor unit
BC: Branch box
IC: Indoor unit
RC: Remote controller
BC (3-branch type)
D E A B C
IC IC IC IC
R R R R
C C C C
2 Evacuation (Fig. 5-10)
Evacuation should be made from the service port provided on the outdoor unit's stop
valve to the vacuum pump commonly used for both liquid or high-pressure pipe and
gas or low-pressure pipe. (Make evacuation from both liquid or high-pressure pipe
and gas or low-pressure pipe with the stop valve closed.)
Remember: Never carry out air purge by refrigerant.
Warning:
When installing or moving a unit to another place, do not mix anything other
than specified refrigerant into the refrigeration cycle. If air is mixed, the refrigera-
tion cycle may obtain abnormally high pressure, resulting in a burst pipe.
* A high-precision gravimeter measurable up to 0.1 kg should be used. If you are unable
to prepare such a high-precision gravimeter, you may use a charging cylinder.
Note:
• Use a gauge manifold, changing hose, and other parts for the refrigerant
indicated on the unit.
• Use a gravimeter. (One that can measure down to 0.1 kg)
Precautions when using the charge valve (Fig.5-11)
Do not tighten the service port too much when installing it, otherwise, the valve core
could be deformed and become loose, causing a gas leak.
After positioning section B in the desired direction, turn section A only and tighten it.
Do not further tighten sections A and B together after tightening section A.
OC
(5-branch type)
BC
A B C
IC IC
RC RC
Note:
The indoor units can be connected
to any of the 5 connectors (5-branch
type) or 3 connectors (3-branch type)
of the branch box.
(3-branch type)
BC
D E A B C
IC IC IC
R R R
C C C