Refrigerant Connections - Trane MCD/MWD-512 Installation & Operation Manual

Refrigerant connections

It is possible to remove the electrical
cabinet to facilitate access to the
refrigerant connection.
Installation procedure
- Make sure the route taken by your
refrigerant lines is as short as
possible.
- Limit pressure losses in the lines
which may be caused by crushing
of the lines, a large number of
bends or bending radii that are too
small.
- Slope all the gas lines leaving the
indoor unit so that oil can return to
the compressor by gravity.
· Prevent any possibility of oil
trapped in the gas lines.
16
Installation
CAUTION!
An insufficiently lubricated
compressor may break down.
If the vertical difference in level
between the units is greater than
2.5 m, an oil trap must be positioned
at the bottom of the vertical line, and
an additional trap must be
positioned every 7.5 m of vertical
elevation to allow oil return to the
compressor. There are no special
technical recommendations for
liquid lines because of the well-
balanced mixture of refrigerant and
oil. Movement of the liquid
refrigerant also causes the oil to
move.
Figure 4 - Protective sleeve
A = Cable bundle
1 = Wall
2 = Inside
3 = Outside
Passage of the tube and cable
bundle
Before drilling into the wall
- make sure there are no pipes or
electrical cables in the wall at the
place where you are going to drill
provide a protective sleeve for the
bundle of tubes and cables at the
point where it passes through the
hole (Figure 4). If permitted by
legislation, the condensate
drainage line can also be included
in the bundle. Wrap tape around
all the lines and cables from the
bottom of the outside unit to the
point where the piping enters the
wall. Carry out the same operation
for each circuit.
A
SS-SVX07B-E4