Lennox WING Application Manual page 20

REFRIGERANT CONNECTIONS
OUTDOOR U.
2
1
INDOOR UNIT
Tube size
Refrigerant lines sizes
Refrigerant lines sizes L
Max. number of bends
If the height length is greater than 5 meters, a siphon suction must be installed on the suction line every 5 meters
to ensure that oil return to the compressor.
(1) Use the coupling fittings included in indoor unit for refrigerant connection with outdoor unit..
NOTE: THE REFRIGERANT LINES GAS AND LIQUID, MUST BE INSULATED
For other positions and longer lengths, consult the Lennox Technical Support Department for application
DISTANCES BETWEEN UNITS
To locate the outdoor and the indoor units, refer to the
following information.
L : Distance length between both units.
1 = Refrigerant vapour line.
2 = Liquid aspiration line.
L
OUTDOOR U.
MODEL
Liquid
Vapour
Máx.Vertical
Total vertical
+
Horizontal
The following data will be obtained from that estimation:
Pipe dimensions, Siphon suction, Insulation, Refrigerant charge
OUTDOOR U.
1
INDOOR U.
2
L
3
2,8
3/8" 3/8"
5/8"(1) 3/4"
15 15
25
20
12
8
assistance.
18
INDOOR U.
2
L
1
4 5
3/8"(1) 1/2"
3/4" 3/4"
15 15
20 20
8 8