Haier SYJS-0308 Service Manual page 109

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 120X70mm dia. with a little slope towards
outside.
3. Piping connection
(1)
Schematic diagram for unit connection
Indoor unit
Flared pipe connection
Indoor unit
(2)
Connection pipe dimensions:
Pipe Value
6.35mm
Liquid
Gaseous 12.7mm
Apply and tighten the nut.
(3)
Maximum length and height difference of connecting pipe
Maximum length: 20m; Height difference: 10m
To ensure efficiency, shortest possible pipe should be used.
Cautions for pipe connection
Pipes free from twists, deformation, water, dust.
Dedicated tools for each R407C and R22
should be used and stored separately.
Optimized radii of bends
Insulation to be applied on all gaseous pipes
Flared section free from cracks
(4) 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.
Gaseous pipe
Manifold tube
Liquid pipe
Flared pipe connection
Torque
18 N . m
50 N . m
Indoor side
Wall hole
70mm
(Cross section of wall hole)
3-way Valve
Outdoor uint
2-way Valve
Spanner
Spanner
Threads on the pipes may be damaged
when tightening if the pipes are not
well aligned.
Outdoor side
Thickness
of wall
Joint
Nut