Daikin DFC Series, Installation Instructions Manual, Page: 3 / 52

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EPA Regulations
Important: The United States Environmental Protection
Agency (EPA) has issued various regulations regarding
the introduction and disposal of refrigerants in this
unit. Failure to follow these regulations may harm
the environment and can lead to the imposition of
substantial fines. Because regulations may vary due to
passage of new laws, we suggest a certified technician
perform any work done on this unit. Should you have
any questions please contact the local office of the EPA.
National Codes
This product is designed and manufactured to permit installation
in accordance with National Codes. It is the installer’s responsibility
to install the product in accordance with National Codes and/or
prevailing local codes and regulations.
The heating and cooling capacities of the unit should be greater
than or equal to the design heating and cooling loads of the area
to be conditioned. The loads should be calculated by an approved
method or in accordance with ASHRAE Guide or Manual J - Load Cal -
culations published by the Air Conditioning Contractors of America.
Obtain from:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036
System design and installation should also, where applicable, follow
information presented in accepted industry guides such as the
ASHRAE Handbooks. The manufacturer assumes no responsibility
for equipment installed in violation of any code or regulation. The
mechanical installation of the packaged roof top units consists of
making final connections between the unit and building services;
supply and return duct connections; and drain connections (if
required). The internal systems of the unit are completely facto -
ry-installed and tested prior to shipment.
Units are generally installed on a steel roof mounting curb assembly
which has been shipped to the job site for installation on the roof
structure prior to the arrival of the unit. The model number shown
on the unit’s identification plate identifies the various components
of the unit such as refrigeration tonnage, heating input and volt -
age. Verify that the Voltage listed on the unit id plate matches the
voltage supplied from the site.
Carefully inspect the unit for damage including damage to the
cabinetry. Any bolts or screws which may have loosened in transit
must be re-tightened. In the event of damage, the receiver should:
1. Make notation on delivery receipt of any visible damage
to shipment or container.
2. Notify carrier promptly and request an inspection.
3. In case of concealed damage, carrier should be notified as
soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. Original Bill of Lading, certified copy, or indemnity bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certified copy thereof, showing trade
and other discounts or reductions.
d. Copy of the inspection report issued by the carrier
representative at the time damage is reported to the
carrier. The carrier is responsible for making prompt
inspection of damage and for a thorough investigation
of each claim. The distributor or manufacturer will not
accept claims from dealers for transportation damage.
NOTE: When inspecting the unit for transportation damage, re -
move all packaging materials. Recycle or dispose of the packaging
material according to local codes.
Pre-Installation Checks
Carefully read all instructions for the installation prior to installing
unit. Ensure each step or procedure is understood and any special
considerations are taken into account before starting installation.
Assemble all tools, hardware and supplies needed to complete the
installation. Some items may need to be purchased locally.
UNIT LOCATION
WARNING
To prevent possible equipment damage, property damage,
personal injury or death, the following must be observed
when installing the unit.
IMPORTANT NOTE: Remove wood shipping rails prior to installation
of the unit. See important note under Roof Curb Installation Only.
All Installations:
Important Note:
Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has sufficiently
warmed the compressors. Compressor damage may occur if
this step is not followed.
NOTE:
Units are vertical supply and return only.
Proper installation of the unit ensures trouble-free operation.
Improper installation can result in problems ranging from noisy op -
eration to property or equipment damages, dangerous conditions
that could result in injury or personal property damage. Damage
or repairs due to improper installation are not covered under the
warranty. Give this booklet to the user and explain it’s provisions.
The user should retain these instructions for future reference.
• For proper operation and condensate drainage, the unit
must be mounted level.
• The flue outlet hood must be at least three feet above any
forced air inlet located within ten feet. The economizer/
manual fresh air intake/motorized fresh air intake and
combustion air inlet mounted on the unit are not affected
by this restriction.
• Do not locate the unit in an area where the outdoor
air (i.e. combustion air for the unit) will be frequently
contaminated by compounds containing chlorine or
fluorine. Common sources of such compounds include
swimming pool chemicals and chlorine bleaches, paint
stripper, adhesives, paints, varnishes, sealers, waxes
(which are not yet dried) and solvents used during