Aisin AXGP224E1, Technical Manual

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2.10 Refrigerant charging
ATTENTION
•
When charging the refrigerant, accurately measurament the length of the piping and
charge the proper amount of refrigerant. If the amount of refrigerant is not proper,
performace will decline or a breakdown could occur.
•
After completion of refrigerant charging, write down the installation record on the plate
“POINTS FOR INSTALLATION” inside the outdoor unit control box panel. Besides,
calculate the refrigerant amount for the whole system and write down the oamount on the
plate. Calculation formula is shown on the plate. (write with a permanent marker so that
the record does not disappear easily).
2.10.1
Refrigerant charging amount
Always check the refrigerant gas factory charge on the unit label before calculating the amount to be added.
Calculate the amount of refrigerant to be charged according to the following formula and liquid piping length
for aech size of piping.
When the GHP is connected to AWS YOSHI E1:
Charge amount (kg) = (L1 × 0.353)+(L2 × 0.250)+( L3 × 0.170)+(L4 × 0.110)+( L5 × 0.054)+(L6 x
0.022)+Q
AWS
When the GHP is connected to direct expansion indoor units:
Quantità in kg = (L1 × 0.353)+(L2 × 0.250)+( L3 × 0.170)+(L4 × 0.110)+( L5 × 0.054)+(L6 x 0.022)+Q
de
Where Q
de
depends on the number of connected indoor units or the size of the AHU according to the table below
Type of indoor units
Q
de
[kg] Q
aws
[kg]
Direct expansion single inddor unit 5,5 -
Direct expansion multiple indoor unit 6,5 -
Direct expansion air handling unit AHU
Riferirsi alle specifiche
del costruttore
-
Air water system YOSHI AWS E1 - 1,5
2.10.2
Refrigerant charging method
•
Place the tank (with the siphon pipe attached) on the refrigerant
scale.
•
Remove the charging hose from the vacuum pump and
connect it to the tank.
•
Perform an air purge of the inside of the charging hose from the
tank to the gauge manifold.
•
Open the valves V1 and V3 and charge the required amount of
refrigerant in the liquid phase. After the charging is completed,
close the valves V1 and V3.
CAUTION
When charging the refrigerant, be sure to wear a pair of leather gloves.
If the refrigerant touches your skin directly, it may cause a frostbite.
L1: liquid piping Ø 22.2 total length (m.)
L2: liquid piping Ø 19.1 total length (m.)
L3: liquid piping Ø 15.9 total length (m.) L4: liquid piping Ø 12.7 total length (m.)
L5: liquid piping Ø 9.5 total length (m.)
L6: liquid piping Ø 6.4 total length (m.)