Panasonic U-8MF1E8 Installation Instructions Manual page 9

3WAY_ECO-i_inst_eng_Book.indb 11
WARNING
Always check the gas density limit for the room in which
the unit is installed.
1-11. Check of Limit Density
When installing an air conditioner in a room, it is necessary to
ensure that even if the refrigerant gas accidentally leaks out, its
density does not exceed the limit level for that room.
If the density could exceed the limit level, it is necessary to
provide an opening between the unit and the adjacent room,
or to install mechanical ventilation which is interlocked with the
leak detector.
(Total refrigerant charged amount: kg)
(Min. indoor volume where indoor unit is installed: m
< Limit density 0.3 (kg/m 3 )
The limit density of refrigerant which is used in this unit is
3
0.3 kg/m (ISO 5149).
The shipped outdoor unit comes charged with the amount of
refrigerant fixed for each type, so add it to the amount that
is charged at the field. (For the refrigerant charge amount at
shipment, refer to the unit's nameplate.)
Minimum indoor volume & floor area as against the amount of
refrigerant is roughly as given in the following table.
2 3
m m
125 337.5
120 324.0
115 310.5
110 297.0
105 283.5
100 270.0
95 256.0
90 243.0
Range below the
85 229.5
density limit of
80 216.0
0.3 kg/m³
75 202.5
(Countermeasures
70 189.0
not needed)
65 175.5
60 162.0
55 148.5
Range above the
50 135.0
density limit of 0.3
45 121.5
kg/m³
40 108.0
(Countermeasures
35 94.5
needed)
30 81.0
25 67.5
20 54.0
15 40.5
10 27.0
5 13.5
0 0.0
0 10 20 30 40 50 60 70 80
Total amount of refrigerant
CAUTION
Pay special attention to any location, such as a basement,
etc. where leaking refrigerant can accumulate, since
refrigerant gas is heavier than air.
1-12. Installing Distribution Joint
(1) Refer to "HOW TO ATTACH DISTRIBUTION
JOINT" enclosed with the optional distribution joint
kit (CZ-P680PH2, P1350PH2, P224BH2, P680BH2,
P1350BH2).
(2) When creating a branch using a commercially available T-joint
(header joint system), orient the main tubing so that it is either
horizontal (level) or vertical. In order to prevent accumulation
of refrigerant oil in stopped units, if the main tubing is
horizontal then each branch tubing length "B" should be at
an angle that is greater than horizontal. If the main tubing is
vertical, provide a raised starting portion for each branch.
When only one indoor unit is connected to the side of "A",
install part "A" at a positive angle (15-30º) for the field tubing
as shown in the figure.
[Header joint system]
● Be sure to solidly weld shut the T-joint end (marked
by "X" in the figure). In addition, pay attention to the
insertion depth of each connected tube so that the flow
of refrigerant within the T-joint is not impeded.
● When using the header joint system, do not make
further branches in the tubing.
● Do not use the header joint system on the outdoor unit side.
(3) If there are height differences between indoor units or if
branch tubing that follows a distribution joint is connected
to only 1 unit, a trap or ball valve must be added to that
distribution joint. (When adding the ball valve, locate it
within 40 cm of the distribution joint.)
(Consult with the dealer separately concerning the ball
valve.)
If a trap or ball valve is not added, do not operate the
3 )
system before repairs to a malfunctioning unit are
completed. (The refrigerant oil sent through the tubing
to the malfunctioning unit will accumulate and may
damage the compressor.)
Tube branching methods (horizontal use)
A
B
Arrow view D
Arrow view C
B
A
view D
view C
Header joint system (Indoor)
Install at a positive angle
Outdoor
Indoor
Indoor
Horizontal
line
Indoor
L3 < 2 m
Horizontal
line
90 100 kg
Types of vertical trap specifications
(When using ball valve)
Main tubing
Indoor unit (more than 2 units)
Ball valve
(If only 1 unit is connected, a ball
(BV: purchased
valve is also needed on this side.)
separately)
Indoor unit (1)
(When not using ball valve)
Main tubing
Horizontal
Indoor unit
(Each unit is connected
to tubing that is either
Branch tubing is
level or is directed
directed upward.
downward.)
More than
20 cm
Indoor unit is directed downward
13
SUPPLEMENT
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1-13. Optional Distribution Joint Kit
See the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 1-12
Model name
CZ-P680PH2
CZ-P1350PH2
CZ-P224BH2
CZ-P680BH2
CZ-P1350BH2
■ Tubing size (with thermal insulation)
CZ-P680PH2
For outdoor unit (Capacity after distribution joint is 68.0 kW or less.)
C
B
Thermal insulation
Horizontal
A
line Table 1-13 Dimensions for connections of each part
View as seen
from arrow
Position A
Dimension –
CZ-P1350PH2
For outdoor unit (Capacity after distribution joint is greater than 68.0 kW and no more than 135.0 kW.)
Install at a
positive angle
(15 – 30°)
Solidly welded
B A
shut (X)
Thermal insulation
Table 1-14 Dimensions for connections of each part
Position A
Dimension ø38.1
Cooling capacity
Remarks
after distribution
68.0 kW or less For outdoor unit
135.0 kW or less For outdoor unit
22.4 kW or less For indoor unit
68.0 kW or less For indoor unit
135.0 kW or less For indoor unit
Example: (C below indicates inner diameter. below indicates outer diameter.)
Discharge tubing
Suction tubing
490 490
300 300
C C D
D
C C DE F E D C D D E F G
C
112 83 101
C D
C D
D E
E F
F G
230 230
Thermal insulation
B C D E F
– ø28.58 ø25.4 ø22.22 ø19.05
Example: (C below indicates inner diameter. below indicates outer diameter.)
Suction tubing
615
375
D C C
B B
B B A C C D E F 53
105 112
B
B
B A
C
I
D
H
G
315
66
G
F
E
GFE EFG
G G
H HI
I
340 50
Liquid tubing
Thermal insulation
B C D E F
ø31.75 ø28.58 ø25.4 ø22.22 ø19.05
14
2011/02/16 14:55:42
Liquid tubing
I
H
G
G
F
E
GFE EF G
G G
I H I H
340 50
Thermal insulation
Unit: mm
G H I J
ø15.88 ø12.7 ø9.52 –
Discharge tubing
490
300
C C
D E F
C C
112
C
C
D
E
F
230
Thermal insulation
Unit: mm
G H I J
ø15.88 ø12.7 ø9.52 –