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7InRow RD 10 kW Air Cooled Operation and Maintenance
Charging With Refrigerant
Calculating R410A charge
Use the following table and formula when calculating the total R410A charge.
Note: All refrigerant pipes must be straight ACR to have 39 bar (565 psig) or above MWP.
Equivalent length of 1/2 in OD discharge line pipe should be kept less than 18 m (60 ft). Total
equivalent length of the discharge line should be less than 46 m (150 ft) to prevent excessive
hot gas pressure drop which can increase the discharge pressure during hot summer days. To
have 61 m (200 ft) total equivalent discharge pipe length the load must be reduced by 5%.
Total charge = Equipment charge + condenser summer charge + condenser flooded charge (for minimum
possible ambient temperature) + liquid R410A in liquid pipe
Equipment charge: 1.6 kg (3.5 lb)
Condenser
model
Selected
ambient
temp. in
°C (°F)
Condenser
summer
charge in
kg (lb)
Condenser flooded charge in kg (lb) for different
minimum outdoor ambient temperatures
4°C (40°F)
-7°C
(20°F) -18°C (0°F)
-29°C
(-20°F)
-40°C
(-40°F)
ACCD75214
35 (95) 2.2 (4.9) 5.48 (12.1) 5.85 (12.9) 6.03 (13.3) 6.17 (13.6) 6.30 (13.9)
ACCD75214
40 (105) 2.2 (4.9) 5.48 (12.1) 5.85 (12.9) 6.03 (13.3) 6.17 (13.6) 6.30 (13.9)
ACCD75215
46 (115) 3.85 (8.5) 9.57 (21.1) 10.16 (22.4) 10.48 (23.1) 10.70 (23.6) 10.93 (24.1)
ACCD75216
35 (95) 1.36 (3) 3.08 (6.8) 3.26 (7.2) 3.36 (7.4) 3.45 (7.6) 3.49 (7.7)
ACCD75218,
ACCD75220*
40 (105) 1.36 (3) 3.08 (6.8) 3.26 (7.2) 3.36 (7.4) 3.45 (7.6) 3.49 (7.7)
ACCD75217,
ACCD75219
46 (115) 2.27(5) 6.12 (13.5) 6.53 (14.4) 6.71 (14.8) 6.89 (15.2) 7.03 (15.5)
* ACCD75220 is CCC certified for use in China.
Type of fitting or valve - Equivalent length of pipe in m (ft)
ACR pipe size (OD)
Gate valve Standard elbow 90 ° Reduced coupling Side outlet T Angle valve
1/2 in
0.18 (0.6) 0.43 (1.4) 0.43 (1.4) 0.82 (2.7) 1.83 (6.0)
5/8 in
0.21 (0.7) 0.49 (1.6) 0.49 (1.6) 0.91 (3.0) 2.13 (7.0)
Recommended Line Sizes
Equivalent length m (ft)
Line Type Air-cooled ACRD units
15 (50)
Discharge line (horizontal)
Discharge line (vertical)
Liquid line
5/8 inOD ACR
1/2 in OD ACR
1/2 in OD ACR
30 (100
)
Discharge line (horizontal)
Discharge line (vertical)
Liquid line
5/8 inOD ACR
1/2 in OD ACR
1/2 in OD ACR
16 (150)
Discharge line (horizontal)
Discharge line (vertical)
Liquid line
5/8 inOD ACR
1/2 in OD ACR
1/2 in OD ACR