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INSTALLATION MANUAL
6.
REFRIGERANT PIPE (the unit with the twins
function)
6.1 Length and drop height permitted of the refrigerant piping
Note: Reduced length of the branching tube is the 0.5m of the
equivalent length of the pipe.
Total pipe length (Actual)
(farthest from the line pipe branch)
(farthest from the line pipe branch)
Indoor unit-outdoor unit drop height
Indoor unit to indoor unit drop height
Outdoor unit
H1<20m
L
The line branch pipe
Note The indoor units should be installed equivalently at the
both side of the U type branch pipe.
The branching pipe must be installed horizontally, error angle
of it should not large than 10 Otherwise, malfunction will be
caused.
U-shaped branching pipe
A direction view
Wrong
Horizontal surface
6.2 Size of joint pipes for indoor unit
Size of joint pipes for indoor unit
Size of main pipe(mm)
Model
Gas side
Liquid side
18K
O
12.7 (1/2)
O
24K
O
15.9 (5/8)
O
30K
O
15.9 (5/8)
O
Max value
Piping
18K+18K 30m
L+L1+L2
24K+24K
50m
30K+30K
50m
15m
L1;L2
10m
L1-L2
20m
H1
0.5m
H2
L1
Indoor unit
H2<0.5m
L2
Indoor unit
o
.
Correct
Available branching pipe
6.35 (1/4)
FQZHN-01D
9.5 (3/8)
FQZHN-01D
9.5 (3/8)
FQZHN-01D
6.3 Size of joint pipes for outdoor unit
Base on the following tables, select the diameters of the outdoor
unit connective pipes. In case of the main accessory pipe large
than the main pipe, take the large one for the selection.
Size of joint pipes for outdoor unit
Model
Gas side
36K
O
15.9 (5/8)
48K
O
15.9 (5/8)
60K
O
15.9 (5/8)
6.4 Refrigerant amount to be added
Calculate the added refrigerant according to the diameter and
the length of the liquid side pipe of the outdoor/indoor unit
connection. The refrigerant is R410A.
(Refer to pag. 47)
7.
TEST OPERATION
Make sure the control box lids are closed on the indoor and outdoor
units.
Refer to ''For the following items, take special care during construction
and check after installation is finished'' on page 4.
After finishing the construction of refrigerant piping, drain piping, and
electric wiring, conduct test operation accordingly to protect the unit.
1
Open the gas side stop valve.
2
Open the liquid side stop valve.
3
Electrify crank case heater for 6 hours.
4
Set to cooling operation with the remote controller and start
operation by pushing ON/OFF button.
5
Check the following points. If there is any malfunction, please
resolve it according to the chapter "Troubleshooting" in the
"Owner's Manual".
The indoor unit
-
Whether the switch on the remote controller works well.
-
Whether the buttons on the remote controller works well.
-
Whether the air flow louver moves normally.
-
Whether the room temperature is adjusted well.
-
Whether the indicator lights normally.
-
Whether the temporary buttons works well.
-
Whether there is vibration or abnormal noise during operation.
- Whether the drainage flows smoothly.
The outdoor unit
-
Whether there is vibration or abnormal noise during operation.
-
Whether the generated wind, noise, or condensed of by the air
conditioner have influenced your neighborhood.
-
Whether any of the refrigerant is leaked.
6
Turn off the main power supply after operation.
A protection feature prevents the air conditioner from being
activated for approximately 3 minutes when it is restarted
immediately after shut off.
52
Size of main pipe(mm)
Liquid side
The 1st branching pipe
O
9.5 (3/8)
FQZHN-01D
O
9.5 (3/8)
FQZHN-01D
O
9.5 (3/8)
FQZHN-01D
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