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APC ACRD500 Installation Manual Page 17

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9InRow RD Operation and Maintenance
Charging With Refrigerant
Calculating R407C charge
Use the following table and formula when calculating the total R407C charge.
Total charge = Equipment charge + condenser summer charge + condenser flooded charge (for minimum
possible ambient temperature) + liquid R407C in liquid pipe
Equipment charge: 9 kg (20 lb)
Quantity of R407C in 7/8 in OD liquid line: (area) x (length in ft) x (density): 0.00306 (ft
2
) x L (ft) x
66.0 (lbm/ft
3
)
Density of liquid R407C at 40.6
°C (105°F) and 17.9 bar (260 psig): 1.057 g/cm
3
(66.0 lbm/ft
3
)
Inside diameter of ACR copper tube (7/8 in OD): 19 mm (0.75-in)
Cross sectional area for 0.75 in inside diameter pipe is 0.000284 m
2
(0.00306 ft
2
)
Liquid line charge for 7/8 in ACR copper tube: 0.32 kg/m (0.22 lb/ft)
Quantity of R407C in 3/4 in OD liquid line: (area) x (length in ft) x (density): 0.00245 (ft
2
) x L (ft) x
66.0 (lbm/ft
3
)
Density of liquid R407C at 40.6
°C (105°F) and 17.9 bar (260 psig): 1.057 g/cm
3
(66.0 lbm/ft
3
)
Inside diameter of ACR copper tube (3/4 in OD): 17 mm (0.67-in)
Cross sectional area for 17 mm (0.67 in) inside diameter pipe is 0.000227 m
2
(0.00245 ft
2
)
Liquid line charge for 3/4 in ACR copper tube: 0.23 kg/m (0.16 lb/ft)
Example: Calculate the total R407C charge for an LNE-S01-A009 condenser with 25 ft of 7/8-in liquid
piping. Minimum outdoor design temperature is -28.9
°C (-20°F).
Note: Imperial units are used in this example.
Total R407C charge: 20 + 10 + 25.6 + (25*0.20) = 60.6 lb.
Condenser
model APC SKU
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)
LNE-S01-A009 ACCD75201
ACCD75204
35 (95) 4.5 (10) 9.7 (21.3) 10.7 (23.5) 11.2 (24.7) 11.6 (25.6) 12.7 (28.0)
LNE-S02-A015 ACCD75202
ACCD75205
40 (105) 6.8 (15) 14.2 (31.2) 15.6 (34.3) 16.4 (36.1) 17.0 (37.4) 18.6 (41.0)
LNE-S03-A027 ACCD75203
ACCD75206
46 (115) 13.6 (30) 28.0 (61.8) 30.8 (68.0) 32.4 (71.5) 33.6 (74.1) 36.8 (81.2)
KH1180.BDVES ACCD75207 35 (95) 5.0 (11) 10.8 (23.7) 11.8 (26.1) 12.5 (27.5) 12.9 (28.5) 14.1 (31.2)
KH1280.ADVES ACCD75208 40 (105) 6.8 (15) 14.4 (31.7) 15.8 (34.8) 16.6 (36.6) 17.2 (38.0) 18.9 (41.6)
KH1280.CDVES ACCD75209 46 (115) 13.6 (30) 28.7 (63.3) 31.6 (69.6) 33.2 (73.3) 34.5 (76.0) 37.7 (83.2)
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