Trane 4TXM2318BF300AA Service Manual page 95

3) Use separate thermal insulation pipes for gas and liquid refrigerant pipe
8. Cutting and Flaring work of piping
• Pipe cutting is carried out with a pipe cutter and burs must be removed.
• After inserting the flare nut, flaring work is carried out.
Pipe
Liquid side
Gas side
9. On drainage
• Please install the drain hose so as to be downward slope without fail. Please don't do the drainage as shown below.
• Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out serely to outdoor.
• In case that the attached drain hose is in a room, please apply heat insulation to it without fail.
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would educe the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incom;ete flaring may cause refrigerant gas leakage.
Pipe diameter Size A (mm)
6.35mm(1/4") 0.8~1.5
9.52mm(3/8") 1.0~1.5
12.7mm(1/2") 1.0~1.5
WARNING
93