Condensing Unit & Heat Pump R410A Service Manual

77
Product Design
Product Design
This secon gives a basic descripon of cooling unit operaon,
its various components and their basic operaon. Ensure your
system is properly sized for heat gain and loss according to
methods of the Air Condioning Contractors Associaon (ACCA)
or equivalent.
CONDENSING UNIT
The condenser air is pulled through the condenser coil by a
direct drive propeller fan. This condenser air is then discharged
out of the top of the cabinet. These units are designed for free
air discharge, so no addional resistance, like duct work, shall be
aached.
The sucon and liquid line connecons on present models are
of the sweat type for eld piping with refrigerant type copper.
Front seang valves are factory installed to accept the eld run
copper. The total refrigerant charge for a normal installaon is
factory installed in the condensing unit.
GSX, GSZ, ASX, ASZ, SSX, SSZ, DSX, DSZ, VSX, and VSZ models are
available in 1 1/2 through 5 ton sizes and use R-410A refrigerant.
They are designed for 208/230 volt single phase applicaons.
GSX/GSZ *****3 models are available in 3, 4, and 5 ton sizes
and use R-410A refrigerant. They are designed for 208/230 volt
3-phase applicaons.
ASX, ASZ, DSX and DSZ R-410A model units use the Copeland
Scroll "Ultratech" Series compressors which are specically
designed for R-410A refrigerant. These units also have
Copeland® ComfortAlert diagnoscs.
GSX, GSZ, SSX, SSZ, VSX, and VSZ R-410A model units,
except for GSX130181C*, GSX130241E*, GSX130301L* and
later, GSX140181L*, GSX140241L* and later, VSX130181B*,
VSX130241E*, VSX130301L*, VSX130421B*, VSX130481B* and
later, VSX140181B*, VSX140241B* and later, GSZ140181L*,
GSZ140241L* and later, VSZ140181B*, VSZ140241B* and later,
use the Copeland Scroll "Ultratech" Series compressors which
are specically designed for R-410A refrigerant.
There are a number of design characteriscs which are dierent
from the tradional reciprocang and/or scroll compressors.
"Ultractech" Series scroll compressors will not have a discharge
thermostat. Some of the early model scroll compressors
required discharge thermostat.
"Ultratech" Series scroll compressors use "POE" or polyolester
oil which is NOT compable with mineral oil based lubricants like
3GS. "POE" oil must be used if addional oil is required.
COILS AND BLOWER COILS
MBR/MBE blower cabinets are designed to be used as a two-
piece blower and coil combinaon. MBR/MBE/MBVC blower
secons can be aached to cased evaporator coil. This two-piece
arrangement allows for a variety of mix-matching possibilies
providing greater exibility. The MBE/MBVC blower cabinets use
a variable speed motor that maintains a constant airow with a
higher duct stac.
MBE blower cabinests are approved for applicaons with cooling
coils of up to 0.8 inches W.C. external stac pressure. The MBE
models includes a feature that allows airow to be changed by
+10% or -15%. The MBVC models allow airow trimming of +/-
10%.
The MBR blower cabinet uses a PSC motor. It is approved for
applicaons with cooling coils of up to 0.5 inches W.C. external
stac pressure.
The MBR/MBE blower cabinets with proper coil matches can be
posioned for upow, counterow, horizontal right or horizontal
le operaon. All units are constructed with R-4.2 insulaon.
In areas of extreme humidity (greater than 80% consistently),
insulate the exterior of the blower with insulaon having a vapor
barrier equivalent to ductwork insulaon, providing local codes
permit.
The CAUF, CAPF and CAPT coils are designed for upow and
counterow applicaons. The CACF and CHPF coils are designed
for horizontal applicaons.
AR*F, ASPF, ASUF, ASPT

These one-piece mul-posion air handlers are used with
R-410A and are available in 2 to 5 ton sizes with oponal 3 kW to
25kW electric heat kits available for eld installaon. The AR*F
units blower design includes a PSC motor and is compable
with heat pumps and cooling applicaons. ASUF and ASPT units
use an EEM blower motor and are compable with heat pumps
and cooling applicaons.
This appliance can be installed in the vercal or le horizontal
posion without modicaon. The horizontal right and
downow posions require product modicaon. This product
is designed for zero inches (0 inches) clearance; however,
adequate access for service or replacement must be considered
without removing permanent structure. This unit can be
installed on a plaorm when deemed necessary.
In an ac installaon a secondary drain pan must be provided
by the installer and placed under the enre unit with a separate
drain line properly sloped and terminated in an area visible to
the owner. This secondary drain pan is required in the event
that there is a leak or main drain blockage. Closed cell insulaon
should be applied to the drain lines in uncondioned spaces
where sweang may occur.
NOTE: Single piece air handlers are factory-sealed to achieve a
2% or less leakage rate at 1.0” water gauge external duct stac
pressure.