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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
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
(5-branch type)
BC
A
B
C
IC
IC
IC
IC
RC
RC
R
R
C
C
[2] Standard systems
2-1. Only 3-branch type
OC
BC
(3-branch type)
A
B
C
IC
IC
IC
R
R
R
C
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
PAC-SG61DS-E
PAC-SG64DP-E
OC: Outdoor unit
BC: Branch box
IC: Indoor unit
RC: Remote controller
(3-branch type)
BC
D
E
A
B
C
IC
IC
IC
IC
R
R
R
R
C
C
C
C
2-2. Only 5-branch type
OC
BC
(5-branch type)
A
B
C
IC
IC
IC
R
R
R
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)
OC
BC
A
B
IC
IC
RC
RC
2-3. 2-branch boxes (3-branch type)
OC
BC
(3-branch type)
A
D
E
IC
IC
IC
R
R
R
C
C
C
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.
(5-branch type)
(3-branch type)
BC
C
D
E
A
IC
R
C
BC
(3-branch type)
B
C
A
B
C
IC
IC
IC
IC
IC
R
R
R
R
R
C
C
C
C
C
B
C
IC
IC
R
R
C
C
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