Haier AF072XCEAA User Manual - Page 12

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