Lennox CSC Installation, Operating And Maintenance Manual page 23

2.- INSTALLATION
2.7- REFRIGERANT CONNECTIONS
TABLE 3.1.: REFRIGERANT CHARGE
Charge of R-410A refrigerant (g) for 0 meters of line (Cooling only). CSC + Air T. Unit
020 025
C1 4800 5950
C2 ------ ------
Charge of R-410A refrigerant (g) for 0 meters of line (Heat pump). CSH + Air T. Unit
020 025
C1 5000 6150
C2 ------ ------
TABLE 3.2.: CHARGE OF REFRIGERANT FOR MULTI-SPLIT SYSTEM
Charge of R-410A refrigerant (g) for 0 meters of line (Cooling only)
055
C1 6800
C2 6800
Charge of R-410A refrigerant (g) for 0 meters of line (Heat pump)
055
C1 7000
C2 7000
C1: Circuit 1. C2: Circuit 2.
REFRIGERANT CHARGE FOR THE SET:
EXAMPLE:
To install a CSH 030 + Air treatment unit, with 22m refrigerant line length between the Condensing unit and Air
treatment unit, the refrigerant charge must be calculated as follows:
.
1 TABLE 1 (p. 20) shows that for 22m of line length between the Air treatment unit and Condensing unit, the line sizes
are: liquid 5/8" and gas 1 1/8".
.
2 TABLE 2 (p. 20) shows, for line sizes of 5/8"-1 1/8", the charge per meter of line is: 177 g/m x 22m = 3894 g.
3 . TABLE 3.1 shows charge of refrigerant for a set with 0m line length is: 6900 g.
.
4 To determine the charge of the set:
Add the charge in the refrigerant lines + the charge in the Air treatment unit and Condensing refrigerant unit.
Note: If the Condensing unit includes the factory pre-charged kit, only the weight of refrigerant per meter of line in
TABLE 2 is taken into account.
• 21 •
030 035 040
6700 8650 10000
------ ------ ------
030 035 040
6900 8950 10350
------ ------ ------
070 085
8600 10250
8600 10250
070 085
8850 10600
8850 10600
Total charge for the set: 3894 + 6900 = 10794 g
Installation, Operation and Maintenance manual • CSC/CSH-MIL153E-1217-05/2018
045 055 070
5700 6800 8600
5700 6800 8600
045 055 070
5850 7000 8850
5850 7000 8850
085 100
10250 13000
10250 9200
085 100
10600 13450
10600 9500