Connection Of Refrigerant Tubing - Trane ILLUSION MCD Series Installation Manual

Proper installation prodecure is
recommended in the Installation
Manual Package, usually provided
together with the outdoor unit. It is
advisable to read bofore installing.
The indoor unit refrigerant connections
are located on the left hand side when
facing the unit (Figure 7).
Figure 7
Connecting the Units with
Flaring Procedure.
1. Cut the copper tube to the required
length with a tube cutter. It is
recommended to cut approx.
20-30 cm. longer than the tubing
length.
2. Remove burrs at the end of the
copper tube with a tube reamer
or file, as shown in Figure 8.
When reaming, hold the tube end
downward and be sure that no copper
scraps fall into the tube (Figure 9).
Deburring
Before
Figure 9
3. Remove the flare nut from the unit
and be sure to insert on the copper
tube.
4. Make a flare at the end of the copper
tube with a flare tool (Figure 10).
MS-SVN004-EN
L/O- 02091985TRA

Connection of Refrigerant Tubing

Flare Tool
Figure 10
A good flare should have the
following characteristics:
• Inside surface is glossy and smooth.
• Edge is smooth.
• Tapered sides are of uniform
length.
Cautions Before Connecting
Tightly
1. Be sure to apply a sealing cap or
water-proof tape to prevent dust or
water from getting into the tubes
before they are used.
2. Be sure to apply refrigerant
lubricant to the matching surfaces
of the flare and union before
connecting them together. This is
effective for reducing gas leaks
(Figure 11).
Apply refrigerant lubricant here
Figure 11
3. For proper connection, align the
union tube and flare tube straight
with each other, then screw in the
flare nut lightly at first to obtain a
smooth match (Figure 12).
Union Flare Nut
Figure 12
After
4. Tighten the flare nuts, using the
appropriate wrench.
Connecting the Unit with
Brazing Prodecure
1. Cut the copper tube to the required
length with a tube cutter. It is
recommended to cut approx.
20-30 cm. longer than the tube length.
9
2. Remove burrs at the end of the
Flare Nut
copper tube with a tube reamer
(Figure 8).
3. There are 2 ways to connect the
Copper Tubing
copper tube
- Use a coupling between the
copper tube of Fan Coil Unit and
the copper tube used for
installation (Figure 13).
Figure 13
- Expand the copper tube by
using a swaging tool set as in
Figure 14.
Swaging Tool
Copper Tube
4. To braze the copper tube, before
brazing a copper tube to a solder
coupling or a copper tube to an
expanded tube, do not forget to
keep them tight as shown in
Figure 15.
Solder Rod
Figure 15
21/4/03, 2:44 PM
Copper Tube
of Fan Coil
Unit
Solder Coupling
Copper Tube of
Condensing Unit
Tube Holder
(Clamp)
Figure 14
Torch
Copper Tube
from Fan
Coil Unit
Solder Coupling
Copper Tube from
Condensing Unit
9