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|nstaI|er's
Guide
@
BASEPAN TAB REMOVAL
NOTE:
Attach R-410A CAUTION Label (located in documentation
package)
to access panel of indoor section.
IMPORTANT:
The outdoor unit is shipped with the proper size orifice and a
stick-on orifice size label in an envelope attached to the outdoor
unit. Outdoor unit nameplate will have correct orifice size
specified as BA YFCCV---A for rated pefformance.
D. iNSTALLiNG
REFRIGERANT
LINES
3. 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 ff'ont of
control box (access panels)
& any other side requiring
service access to meet National
Electrical
Code. Also,
the unit location must be fhr 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
fbr 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
sound or vibration
transmission
to the building
structure.
6. The maximum
length of refrigerant
lines ff'om outdoor to
indoor unit should
NOT exceed sixty (60) feet.
7. If outdoor unit is mounted
above the air handler,
maxi-
mum lift should not exceed sixty (60) feet (suction line).
If air handler
is mounted
above condensing
unit, maxi-
mmn lift should not exceed sixty (60) feet (liquid line).
NOTE:
Refer to "Refrigerant
Piping Software" Pub. No. 32-3312-02.
8. Locate and install
indoor coil or air handler
in accor-
dance with instruction
included
with that unit.
C. ACCUTRON
TM
FLOW CONTROL
VALVE
If the indoor unit System
Refrigerant
Flow control is an
Aecutron
TM
orifice and check valve assembly,
an orifice size
change may be necessary.
The outdoor model determines
the required
orifice size.
Check the listed orifice size on nameplate
of the selected
outdoor model. If the indoor unit is fhctory shipped
with a
diffbrent
orifice size, the orifice must be changed
to obtain
system
rated perfbrmance.
BRAZE
TYPE iNDOOR
END
SEALING
CAP
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 fbr compressor
suction
and liquid pressures.
The indoor end of the recommended
refrigerant
line sets may
be straight
or with a 90 degree bend, depending
upon situa-
tion requirements.
This should be thoroughly
checked out
befbre ordering
refrigerant
line sets.
The gas line must always
be insulated.
in scroll compressor applications,
dome temperatures
may
be hot. Do not touch top of compressor,
may cause minor
to severe burning.
The units
are fhctory 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 will be very difficult
to rebend once it
has been shaped.
3. Determine
the best starting
point for routing
the refriger-
ant 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 betbre making
connections.
8. To prevent
a noise within
the building
structure
due to
vibration
transmission
from the reff'igerant
lines, the
tbllowing precautions
should be taken:
a. When the refrigerant
lines have to be thstened
to floor
joists or other ff'aming in a structure,
use isolation
type hangers.
b. Isolation
hangers
should
also be used when reff'iger-
ant lines are run in stud spaces or enclosed ceilings.
c. Where
the reff'igerant
lines run through
a wall or sill,
they should be insulated
and isolated.
d. Isolate the lines from all ductwork.
© 2008 American Standard Heating & Air Conditioning
18-AC51
D6-1
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