
4
PRODUCT DESIGN
GPCPackageCoolingUnitsaredesignedforoutdoorinstal-
lations only in either residential or light commercial applica-
tions.GPC13**M41aresinglephaseunitsand are available
in 3, 4 ton and 5 ton sizes in 208/230 volts.
The connecting ductwork (Supply and Return) can be con-
nected for either horizontal or vertical airflow. In the vertical
application, a matching Roof Curb is recommended and a
horizontalduct cover kit isrequired.
Areturn airfiltermustbeinstalledbehindthe returnairgrille(s)
or provision must be made for a filter in an accessible loca-
tionwithinthereturnairduct.Theminimumfilterareashould
not be less than those sizes listed in the Specification Sec-
tion. Under no circumstances should the unit be operated
withoutreturnair filters.
A3/4”PVCpipeisprovidedforremovalofcondensatewater
fromtheindoor coil. A trap mustbeprovided to have proper
condensatedrainage. (Do not reduce thedrain line size.)
Refrigerant flow control is achieved by use of restrictor ori-
fices. GPC units use the FasTest Access Fitting System
witha saddle that iseither soldered tothe suction and liquid
lines or is fastened with a locking nut to the access fitting
box (core) and then screwed into the saddle. Do not re-
move the core from the saddle until the refrigerant
charge has been removed. Failure to do so could re-
sult in property damage or personal injury.
Thesingle phase units use permanentsplit capacitor (PSC)
designcompressors. Startingcomponentsarethereforenot
required for these units. A low microfarad run capacitor as-
sists the compressor to start and remains in the circuit dur-
ingoperation.
Theoutdoorfan motors are single phasecapacitortypemo-
tors. GPC1336M41*modelshaveaPSCtypeindoorblower
motor.GPC1348-60M41*unitshave X-13 indoor blowermo-
tors that are energized by a 24V signal from the thermostat
and are constant torque motors with very low power con-
sumption.TheX-13featuresanintegralcontrolmodule.
Airfor condensing (cooling cycle) is drawn through theout-
door coil by a propeller fan, and is discharged vertically out
the top of the unit. The outdoor coil is designed for .0 static.
Noadditionalrestriction (ductwork) shall beapplied.
Conditioned air is drawn through the filter(s), field installed,
across the coil and back into the conditioned space by the
indoorblower.
GPC13 modelsusetheCompliantScroll compressor; there
are a number of design characteristics which are different
fromthetraditionalreciprocating compressor.
- Due to their design Scroll Compressors are inherently
moretolerantofliquidrefrigerant.NOTE:Eventhoughthe
compressorsectionofaScrollcompressorismore toler-
ant of liquid refrigerant, continued floodback or flooded
start conditions may wash oil from the bearing surfaces
causingprematurebearingfailure.
- These Scroll compressors use "POE" or polyolester oil,
whichisNOTcompatiblewithmineraloilbased lubricant
like 3GS. "POE" oil must be used if additional oil is
required.
- Operatingpressures andampdrawsmaydifferfromstan-
dardreciprocatingcompressors. This informationmaybe
foundinthe "Cooling Performance Data" section.
LocationandClearances
NOTE:Toensurepropercondensatedrainage,unitmustbe
installed in a level position.
3"
MIN
12" MIN 36" MIN
(FOR SERVICE)
.
48" MIN
12" MIN
36" MIN
(FOR
SERVICE)
OutsideSlabInstallation-Multi-positional(M)
NOTE: Roof overhang should be no more than 36" and
provisionsmadetodeflectthewarmdischargeairoutfromthe
overhang.
NOTE:Singlephasemodelsrequireinstallationofhorizontal
duct kit #20464501PDGK (medium chassis) and
#20464502PDGK(largechassis)whenusingbottomdischarge.
Minimumclearancesarerequiredtoavoidairrecirculationand
keep the unit operating at peak efficiency.