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Location
NOTE: Airhandlers are designed for indoor installation only.
When installing this airhandler in an enclosed area, such as a ga-
rage/parking area, as with any carbon monoxide producing de-
vice (i.e. and automobile, space heater, water heater, etc.), insure
that the area is properly ventilated.
The DAR airhandler is suitable for installation in multiple locations
including:
* Overhead (attic/mezzanine, etc.)
* Closet/mechanical room
When installing this airhandler, consideration is to be given to mini-
mize the length of refrigerant tubing. Also, do not install the
airhandler in a location either above or below the condenser that
violates the instructions provided with the condenser.
The clearance from a combustible surface to the unit may be 0".
However, service clearance is to take precedence. In addition al-
low a minimum of 36" in front of the unit for service clearance.
Allow sufficient clearance to remove the heater elements for ser-
vice or replacement in heat kits when utilized in application.
When installing in an area directly over a finished ceiling (such as
an attic), an emergency drain pan is required directly under the
unit. See local and state codes for additional requirements.
When installing this unit in an area that may become wet, elevate
the unit with a study, non-porous material.
In installations that may lead to physical damage (warehouse, in-
dustrial sites, etc.), it is advised to install a protective barrier to
prevent such damage.
Ductwork
This DAR air handler is designed for a complete supply and return
ductwork system.
Do not operate this product without all the ductwork
attached.
To ensure correct system performance, the ductwork is to be sized
to accommodate 375-425 CFM per ton of cooling with the static
pressure not to exceed .5" WC. Inadequate duct work that restricts
airflow can result in improper performance and compressor or
heater failure. Ductwork is to be constructed in a manner that
limits restrictions and maintains suitable air velocity. Ductwork is
to be sealed to the unit in a manner that will prevent leakage.
Supply Ductwork and Flanges
The supply ductwork flanges are shipped loose and required
to be field installed. See the following sketch for further
details: Dimensions are approximately 40" x 13-1/8".
Return Ductwork
DO NOT TERMINATE THE RETURN DUCTWORK IN AN AREA THAT
CAN INTRODUCE TOXIC, OR OBJECTIONABLE FUMES/ODORS INTO
THE DUCTWORK. The return ductwork is to be introduced into
the air handler bottom (upflow configuration). The cabinet di-
mensions are 48" x 24".
Return Air Filters
Each installation must include a return air filter. This unit is fac-
tory equipped with disposable return air filters. To ensure opti-
mum performance, frequent filter replacement is advised. See
the following table for the factory installed filter sizes.
Model
Filter Size (in)
DAR0904
DAR1204
Electric Heat
Refer to this manual in combination with the instructions provided
with the heat kit for the correct installation procedure.
The electrical characteristics of the airhandler, the electric heat
kit, and the building power supply must agree.
The air handlers listed in this manual do not have factory installed
electric heat. Electric heat is available as an accessory. If install-
ing this option, the ONLY heat kits that can be used are the AHKD
series.
AHKD MODEL
NOMINAL
NUMBER
KW
AHKD15-3
15
AHKD15-4
15
AHKD20-3
20
AHKD20-4
20
AHKD30-3
30
AHKD30-4
30
For all supply voltages, use the correction factors in the following
tables, multiplied by KW and (or) temperature rise to have cor-
rected results.
4
Qty.
16 x 20 x 2
4
16 x 20 x 2
2
20 x 20 x 2
2
ELECTRICAL
STAGES
CHARACTERISTICS
208-230/3/60
460/3/60
208-230/3/60
460/3/60
208-230/3/60
460/3/60
1
1
2
2
2
2
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