Mitsubishi Electric ECOV-X37VA Manuel D'installation page 38

check joint and the three-way valves, and close the check joint cap. Do this with both the refrigerant service valve (three-way
valve) <liquid> and the refrigerant service valve (three-way valve) <injection>.
• Remove the refrigerant according to the applicable laws and regulations.
9-2. Allowable amount of refrigerant to be charged
Charge the refrigerant according to the table below.
(Install an additional accumulator if the amount of refrigerant exceeds the allowable amount shown in the table.)
Pipe length
(m)
Standard
10
refrigerant
20
charge
30
40
50
Pipe length
(m)
Maximum
10
refrigerant
20
charge
30
40
50
• The internal volume of the condensing unit is 30.4 L.
• When using an 8HP model unit with a pipe length of 30 meters or longer, use ø12.7 liquid pipes to ensure subcooling.
• Add 0.5 kg of refrigerant per 10 m (refrigeration) or 0.4 kg (freezing) when using ø12.7 liquid pipes.
• If the value is not found in the table, calculate the amount of refrigerant to be charged by interpolation.
• Do not overcharge refrigerant more than the maximum amount.
• For information on evaporator internal volume, contact the manufacture of the indoor unit.
• After charging the refrigerant, check that no flash gas (bubbles) is seen through the sight glass while the unit is in operation.
If the flash gas (bubbles) does not disappear, check the following:
1)Check for refrigerant leakage.
2)Check for liquid flood-back.
• Procure a sight glass locally.
WT09614X03_GB
Medium temperature (ET -5~-20°C)
Evaporator internal volume (L)
2 4 6 8
6.3 6.6 7.0 7.4
6.7 7.0 7.4 7.7
7.0 7.4 7.8 8.1
7.4 7.8 8.1 8.5
7.8 8.2 8.5 8.9
Medium temperature (ET -5~-20°C)
Evaporator internal volume (L)
2 4 6 8
8.2 8.6 9.1 9.6
8.7 9.1 9.6 10.1
9.1 9.6 10.1 10.5
9.6 10.1 10.6 11.0
10.1 10.6 11.1 11.5
38
Low temperature (ET -20~-35°C)
Evaporator internal volume (L)
10 2 4 6
7.7 6.0 6.3 6.7
8.1 6.3 6.7 7.0
8.5 6.6 7.0 7.3
8.9 6.9 7.3 7.7
9.2 7.3 7.6 8.0
Low temperature (ET -20~-35°C)
Evaporator internal volume (L)
10 2 4 6
10.0 7.8 8.3 8.7
10.5 8.2 8.7 9.1
11.0 8.6 9.1 9.6
11.5 9.0 9.5 10.0
12.0 9.4 9.9 10.4
(kg)
8 10
7.1 7.4
7.4 7.7
7.7 8.1
8.0 8.4
8.3 8.7
8 10
9.2 9.7
9.6 10.1
10.0 10.5
10.4 10.9
10.8 11.3