Lennox AIRCOOLAIR KNCK 24E - Page 17

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2.- INSTALLATION
CHARGE OF REFRIGERANT FOR THE SET:
EXAMPLE:
To install a KNHK 32E + LEHK 32E set, with a 22m refrigerant line length between outdoor and indoor unit, then
the refrigerant charge must be calculated as follow:
1
st
The TABLE 2 shows, that for 22m of line length between indoor unit and outdoor unit, the line sizes are, liquid
3/4", and gas 1 3/8".
2
nd
TABLE 2 shows, for line sizes of 3/4"- 1 3/8", the charge per meter line is: 232 gr/m.
3
rd
TABLE 3.1. shows charge of refrigerant for the set with 0m of line length is 9300 gr.
4
th
To determine the charge of the set:
Add charge of the refrigerant lines + charge of refrigerant indoor unit and outdoor unit:
Total charge for the set: (232 gr/m) x 22m + 9300 gr = 14404 gr
Indoor and outdoor units are factory pre-charged with Nitrogen (N2).
The installer should remove this gas and charge the units with the refrigerant R-407C
shown on the following tables and also the charge per meter line on TABLE 2.
TABLE 3.1.: CHARGE OF REFRIGERANT FOR OUTDOOR UNIT + INDOOR UNIT LECK / LEHK
TABLE 3.2.: CHARGE OF REFRIGERANT FOR MULTI-SPLIT SYSTEM
24E 32E 48D 64D 86D76D
Charge of refrigerant (gr) R-407C for 0 meters of line KNCK + LECK
Charge of refrigerant (gr) R-407C for 0 meters of line KNHK + LEHK
38E
Charge of refrigerant (gr) R-407C KNCK + 2 x LECK
48D2 64D2 76D2 86D2
Charge of refrigerant (gr) R-407C KNHK + 2 x LEHK
43E
24E 32E 48D 64D 86D76D38E 43E
48D2 64D2 76D2 86D2
8250 2 x 82506200 1185011100 2 x 6450 2 x 11100 2 x 11850
9300 2 x 93007000 1340012500 2 x 7300 2 x 12500 2 x 13400
2 x 82502 x 6450
2 x 118502 x 11100
2 x 93002 x 7300
2 x 134002 x 12500
Note: if the unit includes kit refrigerant charge (optional), take only on account weight of refrigerant per meter line
(TABLE 2).
2.5.-REFRIGERANT CONNECTIONS