Installation Manual
– 14 –
EN
Air purge
NOTE
For the air purge at installation time (Discharge of air in connecting pipes), use “Vacuum pump method” from
viewpoint of the protection of the earths environment.
• For protection of the earths environment, do not discharge the refrigerant gas in the air.
• Eliminate the remaining air (nitrogen gas, etc.) in the unit by using a vacuum pump.
If gas remains, performance and reliability of the unit may be reduced.
After the airtight test, discharge nitrogen gas. Then connect the gauge manifold to the service ports at gas side and
liquid side, and connect the vacuum pump as shown in the following figure.
Perform vacuuming for gas side and liquid side.
• Perform vacuuming from both liquid and gas sides.
• Use a vacuum pump with counter-flow preventive function so that oil in the pump does not back up in the pipe of the
air conditioner when the pump has been stopped. (If oil in the vacuum pump enters in to the air conditioner with
R410A refrigerant, an error may occur in the refrigeration cycle.)
• Use a vacuum pump that has a high vacuum (below -755 mmHg) and a large exhaust gas amount (over 40 L /
minute).
• Perform vacuuming for 2 or 3 hours though time differs due to pipe length.
In this time, check all valves at liquid and gas sides are fully closed.
• If vacuuming valve amount is not decreased to below -755 mmHg even after vacuuming for 2 hours or more,
continue vacuuming for 1 hour or more.
If -755 mmHg or less cannot be obtained by 3 hours or more vacuuming, detect and repair the leak.
• When the vacuuming valve has reached -755 mmHg or less after vacuuming for 2 hours or more, close valves VL
and VH on the gauge manifold fully. Stop the vacuum pump, leave it as it is for 1 hour and then check the vacuum
does not change. If it does change then there may be a leak within the system.
• After the above procedure for vacuuming has finished, exchange the vacuum pump with a refrigerant cylinder and
advance to the additional charging of refrigerant.
Main pipe
Connected to indoor unit
Low pressure
guage
High pressure
guage
Ball valve fully closed
(Gas side)
Flare connection
Flare connection
Packed valve fully closed
(Liquid side)
Service port
Vacuum pump
Gauge
manifold
Outdoor unit
Service port
Adding refrigerant
After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of refrigerant.
Calculation of additional refrigerant charge amount
Default refrigerant amount does not include the refrigerant for pipes at the local site.
For refrigerant to be charged in pipes at the local site, calculate the amount and charge it additionally.
NOTE
Do not degas the refrigerant from the air conditioner when the result of additional refrigerant charge amount
calculation is negative value.
Table 1
Table 2
Additional
refrigerant charge
amount at local site
=
Real length of liquid
pipe
(
m
)
Additional refrigerant
charge amount per
1m liquid pipe
(Table 1)
Liquid pipe dia. (mm)
6.35
9.52
Additional refrigerant amount /
1 m liquid pipe (kg / m)
0.025
0.055
Capacity rank
Capactity code (HP)
EN-27
EN-28
2FAN_IM_DB04905901-00.book Page 14 Friday, October 24, 2014 3:19 PM
0
07 008
0.8
0.9
009
1.0
Corrective amount
of refrigerant
depending on the indoor units
(
kg
)
0.2
0.2
0.2
Outdoor unit type
Factory r
efrigerant
charging
amount (kg)
040 type
050 type
0.9
0.9
060 type
0.9
NOTE
In the case of 060type, should be use Ø15.88 pipe as main gas side connecting pipe. Sine the gas
connecting port size of 060type is Ø19.05, Please use the joint to change pipe diameter size to Ø15.88
from Ø19.05
x
+
]
[
Corrective amount of
refrigerant depending
on the indoor units
(Table 2)
010 012
1.1
1.25
0
14
1.5
0.2
0.2
0.2
015 017
1.7
1.85
018
2.0
0.4
0.4
0.4
020 024
2.25
2.5
027
3.0
0.4
0.4
0
.4
030 036
3.2
4.0
048
5.0
0.4
0.6
0.6
056
6.0
0.6
In case of 2 to 6 indoor units connecting
Additional
refrigerant charge
amount at local site
=
Real length of liquid
pipe
(
m
)
Additional refrigerant
charge amount per
1m liquid pipe
(Table 1)
x
+
]
[
Corrective amount of
refrigerant depending
on the indoor units
(Table
3
)
In case of 1 indoor unit connecting
Capacity rank
Capactity code (HP)
036 048
4.0
5.0
056
6.0
Corrective amount
of refrigerant
depending on the indoor units
(
kg
)
0.6
0.
6
0.
6
Table
3
Содержание MCY-MAP0401TP Series
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