Trane 18-BC55D1-2 - Manual (Page 2)

Installer’s Guide
BASEPAN TAB REMOVAL
REMOVE
TABS AS
SHOWN
installing the unit under a bedroom, kitchen, or picture
window may be annoying to the customer since conden­
sate and fog will occur during the defrost cycle,
4, Avoid locating the unit under the eaves or other over­
head structures as sizeable icicles may form and the unit
may be damaged by these falling icicles.
B.
1
,
2
,
3,
LOCATION AND PREPARATION
OF THE UNIT
When removing unit from the pallet, notice the tabs on
the basepan. Remove tabs by cutting with a sharp tool as
shown above in Figure 2, and slide unit off of pallet.
The unit should be set on a level support pad at least as
large as the unit base pan, such as a concrete slab. If this
is not the application used please refer to application
bulletin “Trane APB2001-02”,
The support pad must NOT be in direct contact with any
structure. Unit must be positioned a minimum of 12" from
any wall or surrounding shrubbery to insure adequate
airflow. Clearance must be provided in front of control
box (access panels) and any other side requiring service
access to meet National Electrical Code, Also, the unit
location must be far enough away from any structure to
prevent excess roof run-off water from pouring directly
on the unit. Do not locate unit(s) close to bedroom(s),
4, The top discharge area must be unrestricted for at least
five (5) feet above the unit,
5, When the outdoor unit is mounted on a roof, be sure the
roof will support the unit’s weight. Properly selected
isolation is recommended to prevent transmission to the
building structure,
6, The maximum length of refrigerant lines from outdoor to
indoor unit should NOT exceed eighty (80) feet,
7, If outdoor unit is mounted above the air handler, maxi­
mum lift should not exceed twenty-five (25) feet (suction
line). If air handler is mounted above condensing unit,
maximum lift should not exceed twenty-five (25) feet (liq­
uid line),
8, Locate and install indoor coil or air handler in accor­
dance with instruction included with that unit,
C. INSTALLING REFRIGERANT LINES
A
CAUTION
If using existing refrigerant lines make certain that all joints
are brazed, not soldered.
Condensing units have provisions for braze connections.
Pressure taps are provided on the service valves of outdoor
unit for compressor suction and liquid pressures,
© 2005 American Standard Inc. All Rights Reserved
The indoor end of the recommended refrigerant line sets may
be straight or with a 90 degree bend, depending upon
situation requirements. This should be thoroughly checked
out before ordering refrigerant line sets.
The gas line must always be insulated.
A
CAUTION
In scroll compressor applications, dome temperatures may
be hot. Do not touch top of compressor, may cause minor
to severe burning.
The units are factory charged with the system charge
required when using fifteen (15) feet of connecting line. Unit
nameplate charge is the same.
Final refrigerant charge adjustment is necessary. Use
the Charging Charts in the outdoor unit Service Facts,
1, Determine the most practical way to run the lines,
2, Consider types of bends to be made and space limitations,
NOTE:
Large diameter tubing wiii be very difficuit to rebend once it
has been shaped.
3, Determine the best starting point for routing the
refrigerant tubing — INSIDE OR OUTSIDE THE
STRUCTURE,
4, Provide a pull-thru hole of sufficient size to allow both
liquid and gas lines,
5, Be sure the tubing is of sufficient length,
6, Uncoil the tubing — do not kink or dent,
7, Route the tubing making all required bends and properly
secure the tubing before making connections,
8, To prevent a noise within the building structure due to
vibration transmission from the refrigerant lines, the
following precautions should be taken:
a. When the refrigerant lines have to be fastened to floor
joists or other framing in a structure, use isolation
type hangers,
b. Isolation hangers should also be used when refriger­
ant lines are run in stud spaces or enclosed ceilings,
c. Where the refrigerant lines run through a wall or sill,
they should be insulated and isolated,
d. Isolate the lines from all ductwork.