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8. Attaching refrigeration lines.
Line up the piping connections. Energize the liquid line solenoid valve, connect Dry Nitrogen, and
adjust to a slight flow through the tubing, being sure no pressure develops in the piping. Connect
flare fittings if a flare fitting model, tighten securely, braze other fittings, leak check, evacuate to
200 microns, charge with R-134 refrigerant, start and check out. Using wire ties, secure tubing as
low as possible in the evaporator so tubing is not visible through air inlet grille.
Note: Be sure the tubes do not stick
out beyond the evaporator opening
for the front panel.