Mitsubishi Electric M-SERIES, Manual

Page: 571 / 586

M series
C-569
MULTI SYSTEM Inverter Heat Pump
MUL
TI
SYSTEMS
INST
ALLA
TION
PROCEDURE
6. Drainage piping work
Outdoor unit drainage pipe connection
When drain piping is necessary, use the drain socket or the drain pan (option).
E - S D 1 6 G S - C A P t e k c o s n i a r D
E - P D 4 6 G S - C A P n a p n i a r D
7. Electrical work
[1] Basic systems
OC
BC
A B C D E
BC
A B C
RC
IC IC IC IC IC
RC
R
C
R
C
R
C
IC IC
R
C
IC
R
C
R
C
OC
BC
A B C D E
BC
A B C
IC
RC
IC IC
RC
R
C
IC
R
C
IC
R
C
(5-branch type)
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)
) e p y t h c n a r b - 3 ( ) e p y t h c n a r b - 5 (
OC: Outdoor unit
BC: Branch box
IC: Indoor unit
RC: Remote controller
5. Installing the refrigerant piping
Freon cylinder
Scale
Valve
3-way joint
Vacuum pump
System analyzer
Lo-knob
LO HI
!
Fig. 5-10
Hi-knob
To branch box
Outdoor unit
Stop valve
Liquid pipe or high-pressure pipe
Gas pipe or low-pressure pipe
! Service port
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.
* Ahigh-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)
* 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
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 only and tighten it.
Do not further tighten sections and together after tightening section .
Fig. 5-11