82-EN
81-EN
– 41 –
Adding refrigerant
After
fi
nishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Refrigerant charge amount at shipment from the factory 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
If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner without
additional refrigerant.
Outdoor unit type
SUG0801
SUG1001
SUG1201
SUG1401
SUG1601
SUG1801
SUG2001
SUG2201
SUG2401
Charging amount (kg)
6.0
9.0
Additional refrigerant charge amount at site = [1] + [2] + [3] + [4]
[1] Compensation by system HP (Table 1)*
[2] Real Length of liquid pipe X additional refrigerant charge amount per 1 m liquid pipe (Table 2)
[3] Corrective amount of refrigerant depending on the Indoor units (Table 3-1, 3-2 and 3-3)
[4]
Corrective amount of refrigerant depending on the outdoor unit diversity (Connected ratio of indoor units to
outdoor units). (Table 4)
Table 1
Standard
System HP
Compensation by System HP (kg)
8
0.5
10
0.7
12
1.2
14
1.2
16
-0.3
18
0.6
20
1.2
22
1.4
24
1.6
ೈ
This table is common for both heat pump and heat recovery models.
Table 2
Liquid pipe dia. (mm)
6.4
9.5
12.7
15.9
19.1
Heat pump
Additional refrigerant amount per
1m liquid pipe (kg/m)
0.024
0.052
0.100
0.152
0.238
Heat recovery
Additional refrigerant amount per 1
m liquid pipe (kg/m)
0.025
0.055
0.105
0.160
0.250
Table 3-1
Corrective amount of refrigerant varies according to indoor unit capacity rank.
Indoor unit Capacity
rank
003 005 007 008 009 010 012 014 015 018 020 024 027 030 036 048 056 072 096
Capacity code
(Equivalent to HP)
0.3 0.6 0.8 0.9
1
1.1 1.25 1.5 1.7
2
2.25 2.5
3
3.2
4
5
6
8
10
Corrective amount of
refrigerant (kg)
0.2
0.4
0.6
1.0
• If the Fresh Air Intake Indoor Unit (MMD-UP
ᅷᅷᅷᅷ
HFP
ᅷ
) is connected, the correction amount refrigerant for
Fresh Air Intake Indoor Unit is 0 Kg.
Table 3-2
Corrective amount of refrigerant varies for Hot Water Module
Indoor unit Capacity rank
024
048
Capacity code (Equivalent to HP)
2.5
5
Corrective amount of refrigerant (kg)
0.2
Table 3-3
Corrective amount of refrigerant varies for (MMU-UP
ᅷᅷᅷ
H-E) High Ef
fi
ciency 4 way cassette
Indoor unit capacity rank
009
012
015
018
024
027
030
036
048
056
Capacity code (Equivalent to HP)
1
1.25
1.7
2
2.5
3
3.2
4
5
6
Corrective amount of refrigerant (kg)
0.2
0.6
Charging of refrigerant
• Keeping the valve of the outdoor unit closed, be sure to charge the liquid refrigerant into the service port at the
liquid side.
• If the speci
fi
ed amount of refrigerant cannot be charged, fully open the valves of the outdoor unit at liquid and
gas sides, operate the air conditioner in COOL mode, and then charge refrigerant into service port at the gas
side. In this time, choke the refrigerant slightly by operating the valve of the canister to charge liquid refrigerant.
• The liquid refrigerant may be charged suddenly, therefore be sure to charge refrigerant gradually.
Table 4
Corrective amount of refrigerant varies according to the outdoor unit diversity
Diversity D (%)
Corrective amount
of refrigerant (kg)
50%
≤
D < 60%
-2.5
60%
≤
D < 70%
-2.0
70%
≤
D < 80%
-1.5
80%
≤
D < 90%
-1.0
90%
≤
D < 95%
-0.5
95%
≤
D
0
