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(1) Calculation of additional amount for pipe length
Total length of ø 12.70
mm liquid pipe
a × 0.114
(kg/m)
A =
m
Total length of ø 6.35
mm liquid pipe
a × 0.021
(kg/m)
+
m
(2) Calculation of total refrigerant amount
C = A+B =
NOTES:
Check the total refrigerant amount under the following conditions
Condition
Model
AJ*072LELDH
AJ*090LELDH
AJ*108LELDH
Total amount of
refrigerant
AJ*126LELDH
AJ*144LELDH
AJ*162LELDH
<Calculation>
Outdoor unit: AJ*126LELDH
(1) Calculation of additional amount for outdoor unit
If liquid pipe length is the following
ø 12.70 mm: 50 m, ø 9.52 mm: 25 m, ø 6.35 mm: 15 m
Additional charge amount:
A = 50 m × 0.114 kg/m + 25 m × 0.058 kg/m +15 m × 0.021 kg/m = 7.465 kg ≈
7.47 kg
(2) Check the total amount of refrigerant
C = A + B = 7.47 kg + 11.0 kg = 18.47 kg ≤ 25.6 kg
→No problem if the above condition is satisfied.
8.4. Installing thermal insulation
• Install thermal insulation after conducting the "8.1. Sealing test".
• To prevent condensation and water droplets, install thermal insulation on the refrigerant
pipe.
• Refer to the table to determine the thickness of the thermal insulation.
• If the outdoor unit is installed at a level that is higher than the indoor unit, the water that
has condensed in the 3-way valve of the outdoor unit could travel to the indoor unit.
Therefore, use putty in the space between the pipe and the thermal insulation to prevent
the entry of water.
Selection of thermal insulation
(Use a thermal insulation with equal heat transmission rate or below 0.040 W/(m·k))
Insulation material minimum thickness (mm)
Relative humidity
≤ 70%
6.35
8
9.52
9
12.70
10
Pipe diameter
15.88
10
(mm)
19.05
10
22.22
11
28.58
11
* When the ambient temperature and relative humidity exceed 32°C (DB) and 85%
respectively, strengthen thermal insulation of refrigerant pipe.
8.5. Filling with putty
WARNING
Fill the piping holes and wiring holes with putty
(locally purchased) to avoid any gap (Fig A). If
small animals such as insects enter the external
unit, a short circuit may be caused near electrical
components in the service panel.
If the outdoor unit is installed at a level that is higher
than the indoor unit, the water that has condensed
in the 3-way valve of the outdoor unit could travel to
the indoor unit. Therefore, use putty in the space be-
tween the pipe and the thermal insulation to prevent
the entry of water to the indoor units.
Total length of ø 9.52
mm liquid pipe
a × 0.058
+
m
kg
Total
=
(Round up A to 2 decimal place)
kg
(B: Factory charged amount)
kg
Computational formula
C ≤ 20.0 kg
C ≤ 25.6 kg
≤ 75%
≤ 80%
≤ 85%
10
13
11
14
12
15
12
16
13
16
13
17
14
18
Fig. A
Putty
Thermal
insulation
9. TEST RUN
9.1. Indoor unit connection check
(kg/m)
Normal operation will not be possible without performing the Indoor unit connection check.
9.1.1 Things to confirm before starting the Indoor unit connection
kg
check
To ensure safety, check that the following work, inspections and operations have been
completed.
kg
1
Check that all wiring work for the outdoor unit and the
indoor units is completed.
2
Is a breaker installed at the power supply cable of out-
door unit and every indoor units?
3
Are the cables connected to the terminals without loose-
ness, and in accordance with the specifications?
4
Are all the indoor units stopped? Indoor unit connection
check cannot be performed if any unit is operating.
5
Is the connection to Service tool (UTY-ASGX) and Web
monitoring tool (UTY-AMGX) stopped?
9.1.2 Operating procedure for Indoor unit connection check
Perform the indoor unit connection check according to following procedures.
The Indoor unit connection check can be completed within several minutes.
Turn on the power of indoor
unit and outdoor unit.
17
18
19
20
21
22
23
Check Item
: Press the "MODE/EXIT" button
: Press the "SELECT" button
: Press the "ENTER" button.
: Press the "ENTER" button for
more than 3 seconds.
Set to Function mode [F3].
(When [F4] to [F9] are displayed, continue to press
the "SELECT" button until [F3] is displayed.)
Press the "SELECT" button until "12" is displayed.
Press the "ENTER" button for more than 3 seconds.
When indoor unit connection
check cannot be performed
This will be displayed when the Indoor unit connection
check starts.
Confirm the number of connected indoor units and the
volume ratio of the indoor units connection.
(*1) The number of connected indoor units
Ex.) When 8 units are connected
(*2) Volume ratio of the indoor units connection
Ex.) When the ratio is 120%
Exit indoor unit connection check mode.
When error occurs
Refer to the following "9.1.3 Error displays"
for details.
When it finishes normally, nothing will be displayed on
7-segment display.
Check Column
En-16
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