Trane 4TXM2318BF300AA Service Manual page 62

Confirming Drainage
The drainage should be confirmed during the test run to make
sure that there is leakage at the connection.
The confirmation of drainage should be also performed during
the installation in the winter season.
• After mounting the electrical system, do cooling operation and
meanwhile add water and check.Fill 600cc water with a hose
from the injection nozzle. Add the water slowly. Don't add water
to the motor of the drainage pump.
• Confirm the sound of the motor:
Confirm the sound of the motor of the drainage pump and meanwhile check the drainage.
Tubing Permissible Length & Height Difference
Please refer to the attached manual of outdoor units.
Tubing Materials & Specifications
Please refer to the attached manual of outdoor units.
Tubing Size (mm)
Tubing Material
Refrigerant Filling Amount
Add the refrigerant according to the installation instruction of outdoor unit. The addition of R410A refrigerant must
be performed with a measure gage to ensure the specified amount while compressor failure can be caused by
filling too much or little refrigerant.
Connecting Procedures of Refrigerant Tubing
Proceed the flare tube connecting operation to connect all the refrigerant tubes.
• Dual wrenches must be used in the connection of indoor unit tubing.
• Mounting torque refers to the right table
Outer Diameter of Tubing (mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Model
Gas pipe
Liquid pipe
Phosphor deoxybronze seamless pipe (TP2) for air conditioner
Mounting Torque (N-m)
11.8(1.2kgf-m)
24.5(2.5kgf-m)
49.0(5.0kgf-m)
78.4(8.0kgf-m)
drain connection
4MXE2309BF0W0AA
Ø9.52
Ø6.35
Increase mounting Torque (N-m)
60
100mm
below
under the ceiling
injection nozzle
4MXE2312BF0W0AA
Ø9.52
Ø6.35
wrench
13.7(1.4kgf-m)
29.4(3.0kgf-m)
Connecting
circular
53.9(5.5kgf-m)
terminals:
98.0(10.0kgf-m)
terminal tier