Split system room air conditioners and heat pumps CXE - EXE AERMEC

Chapter II

Good morning !

REFRIGERANT PIPING

Use two spanners when connect the refrigerant pipe to the unit.Make a bend with a radius as large as possible.After completing the piping connection execute vacuum drying for the connecting piping and the indoor unit.The vacuum drying must be carried out using the service ports of both the liquid and gas side valves.When piping work is finished,check all joints.

INSTALLATION OF OUT DOOR UNIT

Select the following location
A place where the air conditioner can get good ventilation. A place where the unit shall be leveled and that can support the weight of unit and withstand its vibrations.

Connecting pipes to the indoor unit
Preparation of piping
Main cause of leakage is defect in flaring work.Carry out correct flaring work in the following procedure.
Cut the pipe and the cable
Use the accessory piping kit of the pipes purchased loccaly.Measure the distance between the indoor and the outdoor unit.Cut the pipes a little than measured distance. Cut the cable 1.5m longer than the pipe length.
Burrs removal
Completely remove all burrs from the cut cross section of pipe /tube .Put the end of the copper tube pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing.
Putting nut on
Remove flare nuts attached to indoor and outdoor units,than put them on pipe/tube having completed burr removal.
Flaring work
Carry out flaring work using flaring tool as shown below.
Pipe bending
Annealed copper pipe with small diameter can be easily bentmanually.In this case ,secure large R –radius for the bend section and gradually bend pipe If annealed copper pipe is large in diameter,bend pipe with bender .Use bender appropriate for the pipe diameter.
Refrigerant piping
When connecting piping ,be sure to keep piping dry ,clean and air tight. When connecting piping on rainy days or making a through-hole is wall, take due care to prevent water or plaster from entering piping.

CAUTION
This procedure is designed to prevent formation of oxidation film by filing piping with inert gas.Note that excessive gas pressure will generate pinholes at brazed points.

Connecting Pipes to the Outdoor Unit

Align the center of the pipings and sufficienly tighten the flare nut with fingers.Finally ,tighten the flare nut with torque wrench until the wtench clicks.When tightening the flare nut with torque wrench ,ensure the direction for tightening follows the arrow on the wrench.