Mitsubishi Electric M Series Manual page 571

M series
5. Installing the refrigerant piping
LO HI
Freon cylinder
Scale
Valve
3-way joint
Vacuum pump
System analyzer
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).
D a r n i s o k c t e
D a r n i p a n
7. Electrical work
[1] Basic systems
OC
BC (5-branch type)
A B C D
IC IC IC IC
RC RC
R R
C C
Hi-knob
To branch box
Outdoor unit
Stop valve
Liquid pipe or high-pressure pipe
Gas pipe or low-pressure pipe
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 only.
(Do not further tighten sections and
together.)
Charge hose
Service port
P A C S - G 6 1 D S E -
P A C S - G 6 4 D P E -
OC: Outdoor unit
BC: Branch box
IC: Indoor unit
RC: Remote controller
BC (3-branch type)
E A B C
IC IC IC IC
R R R R
C C C C
MULTI SYSTEM Inverter Heat Pump
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 in the desired direction, turn section
Do not further tighten sections and
OC
BC 5 ( b - a r n c h y t p
A B C
IC IC
RC RC
only and tighten it.
together after tightening section .
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.
) e BC 3 ( b - a r n c h y t p ) e
D E A B C
IC IC IC
R R R
C C C
C-569