Soleus Air KFR/KFS Series Installation instructions, Indoor unit refrigeration line installation

Installation instructions

3. Indoor unit refrigeration line installation

•The refrigeration lines and wiring can be routed to the outdoor unit in a number of ways (left or right from the back of the unit), by using the cut-out access pieces on the casing of the unit.

•Bend the refrigeration lines carefully to the required positon in order to be aligned with the drilled hole.

piping direction

cut-out access

	Note:
Saw the cut-out access off	When installing the refrigeration lines at the directions 1, 2 or 4,
along the side of the casing	saw the corresponding cut-out piece off the indoor unit casing.

•After connecting refrigeraton lines (see directions below), install the condensate drain line (see page21+24fordetailed instructions on connecting condensate drain line). Then connect all wiring (see pages 2 5-27 for detailed instructions on wiring). After all connections are made, bundle the refrigeration lines, wiring, and condensate drain line together using a thermal insulation and vinyl/duct tape.

Refrigeration lines insulation:

•It is important that both the liquid and suction refrigeration lines are individually insulated to ensure that they do no sweat and also to maintain proper unit capacities. This is necessary since the refrigeration is

metered from the outdoor unit and will produce condensation on both refrigeration lines if not proper insulated.

Refrigeration lines/Condensate drain line/wiring bundle thermal insulation:

•Place the condensate drain line under the refrigeration lines.

•Insulation material should be a polythene foam that is approximately a 1/4 inch wall thickness.

•Condensate drain line should have a downward slope at all times to ensure proper drainage. Do not allow the drain line to be twisted, horizontal or the

end of the line be immersed in water. If an extension is added to the drain line, make sure that it is also properly insulated.

Connection of refrigeration lines:

•Do not use contaminated or damaged copper tubing for refrigeration lines. If any of the tubing, evaporator or condenser coils have been exposed to the air for more that 15 seconds, it is important that they are vacuumed and purged with field-supplied refrigerant. Do not remove plastic or rubber plugs and brass nuts from the valves, fittings, tubing, or coils until they are ready to be connected.

•Use proper tubing cutters to cut the refrigeration lines, advancing the blade of the tubing cutters slowly. Extra force or improper cutting will cause tubing distortion and also extra burring.

•Once refrigeration tubes are cut, remove burrs from cut edges with a remover. This will avoid unevenness on the flare faces, which could cause a gas leak. Hold the ends of the pipes downward to prevent metal from going into the tubes.

•Insert the flare nuts, mounted on the connection ends of both the indoor and outdoor units onto the ends of the copper tubing.

•The length of the pipe protruding from the face of the flare die is determined by the particular flaring tool that will be used.

•Fix the pipe firmly on the flare die. Match the centers of both the flare die and the flaring punch, and then tighten the flaring punch fully.

•Once flaring is complete, connection of the tubing is ready. Align the center of the tubing and tighten the flare nuts using a torque wrench.

- 18 -