Lennox ASC Series Installation, Operating And Maintenance Manual page 20

2. INSTALLATION
2.6- REFRIGERANT CONNECTIONS
To locate outdoor and indoor units, refer to the following information:
OUTDOOR UNIT
A
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
2%
2
2%
OUTDOOR UNIT
2
1
2%
NOTE: The units are supplied with welded connections. As an option,
service valves are available for liquid and gas lines.
- GAS LINES MUST ALWAYS BE INSULATED.
- THE HORIZONTAL LINES MUST SLOPE AT LEAST 2% TOWARDS THE OUTDOOR UNIT.
- THE MAXIMUM SPEED IN THE LINES, SHOULD NOT BE MORE THAN 15 m/sec.
Legislation does not allow refrigerant gas emissions to the atmosphere, so the refrigerants have to be recycled to
avoid being released to the atmosphere. Those recycled refrigerants shall be processed afterwards by an authorized
waste manager.
Those components derived from the recycling of the unit have to be managed by authorized waste manager or be left
in local waste facilities according the local normative in each country.
• 19 •
2%
POSITION A: A siphon suction must be installed in the vertical part of the gas line,
and siphons must be installed every 8 meters in the rising section. The minimum
2
suction speed must not be below 6m/s. Maximum vertical length 16m.
1
2%
B
1
L
POSITION C: Install a siphon at the base of the vertical of the gas line,
no more siphons are necessary. Maximum vertical length 16 m.
INDOOR UNIT
C
POSITION B: Slope the lines toward the outdoor unit. Take special
care with lines longer than 10, and avoid collapse.
Unit positions
A, B, C :
Total length
L :
Gas line
1 =
2 = Liquid line
Installation, Operation and Maintenance manual • ASC/ASH-MIL152E-1217-01/2019