
PRODUCT DESIGN
4
Modelscovered by this manualcomewithanew4-wirecom-
municatingPCB. When paired with a compatiblecommuni-
cating indoor unit and a communicating thermostat, these
modelscansupport4-wirecommunicationprotocolandpro-
videmoretroubleshootinginformation.Thesemodelsarealso
backwardcompatible with the legacythermostat wiring.
*SXC16 models are available in 2, 3, 4 and 5 ton sizes and
use R-410A refrigerant. They are designed for 208/230 volt
singlephaseapplications.
The condenser air is pulled through the condenser coil by a
direct drive propeller fan. This condenser air is then dis-
charged out of the top of the cabinet.
These units are designed for free air discharge, so no addi-
tional resistance like duct work shall be attached.
The suction and liquid line connections on present models
areofthe sweat type for field piping withrefrigeranttypecop-
per. Front seating valves are factory installed to accept the
fieldruncopper. The total refrigerantcharge for a normal in-
stallation is factory installed in the condensing unit. *SXC
units are charged for the matching evaporator coil and a 15
footrefrigerantlineset.
Systems should be properly sized by heat gain and loss
calculations made according to methods of the Air Condi-
tioning Contractors Association (ACCA) or equivalent. It is
the contractors responsibility to ensure the system has ad-
equate capacity to heat or cool the conditioned space.
*SXC16 models use the Copeland Scroll "Ultratech" Series
compressorswhichare specifically designed for R-410Are-
frigerant. Thereare anumberofdesign characteristics which
are different from the traditional reciprocating and/or scroll
compressors.
"Ultratech" Series scroll compressors with Copeland®
ComfortAlert diagnostics will not have a discharge thermo-
stat, some of the early model scroll compressors required
dischargethermostats.
Due to their design Scroll compressors are inherently more
tolerantofsmall quantities of liquid refrigerant.
NOTE: Eventhough the compressorsectionofaScroll com-
pressor is more tolerant of liquid refrigerant, continued
floodback or flooded start conditions may wash oil from the
bearingsurfacescausing premature bearing failure.
"Ultratech" Series scroll compressors use "POE" or
polyolesteroil whichis NOT compatiblewithmineraloilbased
lubricants like 3GS. "POE" oil must be used if additional oil
isrequired.
WARNING
To avoid possible injury, explosion or death, practice
safe handling of refrigerants.
Operating pressures and amp draws may differ from stan-
dardreciprocatingand/orscroll compressors. This informa-
tion may be found in the "Cooling Performance Data" sec-
tion.
This unit is for outdoor installation only. Refer to figure for
minimum clearances from the sides of the unit to full walls
andother objects.
NOTE: This unit cannot be completely enclosed. At least
one side must be unrestricted.
Theseclearanceswillhelpavoidairrecirculation.Ifinstalling
two or more units at the same location, allow at least 24
inches between units. If only one side is restricted (for ex-
ample, against the outside wall of a house), the unit may be
placed as close as 8" to that one wall.
DO NOT locate the unit:
* Directlyundera vent termination fora gas appliance.
* Within 3 feet of a clothes drier vent
* Wheretherefreezingofdefrostwaterwould create
ahazard
* Where water may rise into the unit.
OK!
OK!
AA AAA
A
CC
CCOK!
OK!
OK!
OK!
NOT
RECOMMENDED
AA
AA AA
AA
AA
B B B
B
Model Type A B C AA
Residential 10" 10" 18" 20"
Light Commercial 12' 12" 18" 24"