Daikin DAR09 - Product Design and Cooling Unit Operation; Condensing Unit Operation

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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.
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.
DX11S/DX13S/DX14S*/DX16SADZ11S/DZ13S/DZ14S*/DZ16SA
*****3 models are available in 3, 4, 5, 7.5 and 10 ton sizes
and use R-410A refrigerant. They are designed for 208/230 volt
3-phase applicaons.
DX11S/DX13S/DZ11S/DZ13S *****4 models are available in 3,
4, 5, 7.5 and 10 ton sizes and use R-410A refrigerant. They are
designed for 460 volt 3-phase applicaons.
DX and DZ R-410A model units use the Copeland Scroll "Ultrat-
ech" Series compressors which are specically designed for
R-410A refrigerant. These units also have Copeland® CoreSense
diagnoscs.
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 re-
quired 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 blower cabinets are designed to be used as a two-piece
blower and coil combinaon. MBR 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 great-
er exibility.
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 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
Mul-Posion Air Handler
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
unit’s 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 de-
signed 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.