Haier AB072MRERA Service Manual page 498

Fixing of the unit
1. Position of the wall hole
Wall hole should be decided according to installation place and
piping direction. (refer to installation drawings).
2. Making a wall hole
Drill a hole of 120×70mm dia. with a little slope towards outside.
Pipe Length & Height Difference
Please refer to the attached manual of outdoor units.
Pipe Materials & Specifications
Model
Pipe Size (mm)
Pipe Material
Refrigerant Recharge Amount
Recharge 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 too much or less refrigerant.
Connecting Procedures of Refrigerant Tubing
Connecting Procedures of Refrigerant Pipe
■ Schematic diagram for unit connection
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
■ Pipe connection process
■ Apply refrigeration oil on the end of the pipe to be
connected and on the flared section
■ Align the pipes to be connected and tighten the nut
(See the figure)
■ Ensure that no foreign articles enter into the pipes
■ Cautions for pipe connection
■ Pipes free from twists, deformation, water, dust.
■ Dedicated tools for each R407C and R410A should be
used and stored separately
■ Optimized radii of bends
■ Insulation to be applied on all gaseous pipes
■ Flared section free from cracks
Gas Pipe
Liquid Pipe
Phosphor deoxy bronze seamless pipe (TP2) for air conditioner
AF052-182MAERA
Φ12.7
Φ6.35
Threads on the pipes may be damaged when
tightening if the pipes are not well aligned.
Outer
diameter of
torque (N.m)
tubing (mm)
Φ6.35 11.8 (1.2kgf.m) 13.7 (1.4kgf.m)
Φ12.7 49.0 (5.0kgf.m) 53.9 (5.5kgf.m)
490
Increase
Mounting
mounting torque
(N.m)