Product Design - Daikin DAR09 Service Instructions Manual

PRODUCT DESIGN

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.
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.
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 applications.
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 applications.
DX and DZ R-410A model units use the Copeland Scroll "Ultrat-
ech" Series compressors which are specifically designed for
R-410A refrigerant. These units also have Copeland® CoreSense
diagnostics.
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 re-
quired 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 blower cabinets are designed to be used as a two-piece
blower and coil combination. MBR blower sections can be
attached to cased evaporator coil. This two-piece arrangement
allows for a variety of mix-matching possibilities providing great-
er flexibility.
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 blower cabinets with proper coil matches can be
positioned for upflow, counterflow, horizontal right or horizontal
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 down-
flow positions require product modification. 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
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.
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