Service Instructions

PRODUCT DESIGN
74
This section gives a basic description of cooling unit operation,
its various components and their basic operation. Ensure your
system is properly sized for heat gain and loss according to
methods of the Air Conditioning Contractors Association (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 additional resistance, like duct work, shall be
attached.
The suction and liquid line connections on present models are of
the sweat type for field piping with refrigerant type copper. Front
seating valves are factory installed to accept the field run copper.
The total refrigerant charge for a normal installation 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 applications.
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 applications.
ASX, ASZ, DSX and DSZ R-410A model units use the Copeland Scroll
"Ultratech" Series compressors which are specifically designed
for R-410A refrigerant. These units also have Copeland
®
ComfortAlert diagnostics.
GSX, GSZ, SSX, SSZ, VSX, and VSZ R-410A model units, except for
GSX130181C*, VSX130181B*, VSX130241E*, VSX130421B*, and
VSX130481B*, use the Copeland Scroll "Ultratech" Series com-
pressors which are specifically designed for R-410A refrigerant.
There are a number of design characteristics which are different
from the traditional reciprocating 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 compatible with mineral oil based lubricants
like 3GS. "POE" oil must be used if additional oil is required.
COILS AND BLOWER COILS
MBR/MBE blower cabinets are designed to be used as a two-piece
blower and coil combination. MBR/MBE/MBVC blower sections
can be attached to cased evaporator coil. This two-piece arrange-
ment allows for a variety of mix-matching possibilities providing
greater flexibility. The MBE/MBVC blower cabinets use a variable
speed motor that maintains a constant airflow with a higher duct
static.
MBE blower cabinests are approved for applications with cool-
ing coils of up to 0.8 inches W.C. external static pressure. The MBE
models includes a feature that allows airflow to be changed by
+10% or -15%. The MBVC models allow airflow trimming of +/-
10%.
The MBR blower cabinet uses a PSC motor. It is approved for
applications with cooling coils of up to 0.5 inches W.C. external
static pressure.
The MBR/MBE blower cabinets with proper coil matches can be
positioned for upflow, counterflow, horizontal right or horizon-
tal left operation. All units are constructed with R-4.2 insulation.
In areas of extreme humidity (greater than 80% consistently),
insulate the exterior of the blower with insulation having a vapor
barrier equivalent to ductwork insulation, providing local codes
permit.
The CAUF, CAPF and CAPT coils are designed for upflow and
counterflow applications. The CACF and CHPF coils are designed
for horizontal applications.
AR*F, ASPF, ASUF, ASPT
Multi-Position Air Handler
These one-piece multi-position air handlers are used with R-
410A and are available in 2 to 5 ton sizes with optional 3 kW to
25kW electric heat kits available for field installation. The AR*F
unit’s blower design includes a PSC motor and is compatible with
heat pumps and cooling applications. ASUF and ASPT units use
an EEM blower motor and are compatible with heat pumps and
cooling applications.
This appliance can be installed in the vertical or left horizontal
position without modification. The horizontal right and downflow
positions require product modification. 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 platform
when deemed necessary.
In an attic installation a secondary drain pan must be provided
by the installer and placed under the entire 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 insulation
should be applied to the drain lines in unconditioned spaces
where sweating 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 static
pressure.