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Installation Manual of Room Air Conditioner
10
Double-spanner
operation
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
Indoor side
Outdoor side
Thickness
of wall
Wall hole
70mm
(Cross section of wall hole)
Threads on the pipes may be damaged
when tightening if the pipes are not
well aligned.
(1)
Schematic diagram for unit connection
(4)
Pipe connection process
Torque
18 N
.
m
Pipe Value
6.35mm
Liquid
50 N
.
m
(2)
Connection pipe dimensions:
9.52mm
Gas
Outdoor uint
3-way Valve
2-way Valve
Indoor unit
Indoor unit
Apply and tighten the nut.
(3)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
Joint
Spanner
Spanner
Nut
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.
Flared pipe connection