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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. These regulations may vary
by jurisdiction. A certified technician must perform the installation
and service of this product. Should questions arise, contact your
local EPA office.
This product is designed and manufactured to permit installation
in accordance with national codes. It is the installer’s
responsibility to install this unit in accordance with national codes
and/or prevailing local codes and regulations.
INSTALLATION REQUIREMENTS
These instructions are intended as a general guide only and do
not supersede any national or local codes in any way.
Compliance with all local, state, or national codes pertaining to
this type of equipment should be determined prior to installation.
Read this entire instruction manual, as well as the instructions
supplied in separate equipment, before starting the installation.
All models are designed for indoor installation only.
The installation of the air handler, field wiring, warm air ducts, etc.
must conform to the requirements of the National Electrical
Code, ANSI/NFPA No. 70 (latest edition) in the United States, and
any state laws, and local ordinances (including plumbing or
wastewater codes). Local authorities having jurisdiction should
be consulted before installation is made. Such applicable
regulations or requirements take precedence over the general
instructions in this manual.
Install the conditioned air plenum, ducts and air filters (not
provided) in accordance with NFPA 90B Standard for the
Installation of Warm Air Heating and Air-Conditioning Systems
(latest edition).
The air handler is provided with flanges for the connection of the
plenum and ducts.
Air filters (not provided) must be listed as Class 2 furnace air
filters.
The air handler may be used with an optional modular evaporator
coil (WMAH) in upflow, counterflow, or horizontal applications.
See “Installation Configuration Options” in “Installation
Configurations” for acceptable system configurations. The
mounting plates and the necessary hardware to connect the air
handler and modular evaporator coil cabinets together are
included with this air handler.
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WARNING
This product is factory-shipped for use with 208/240/1/60
electrical power supply. DO NOT reconfigure this air
handler to operate with any other power supply.
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WARNING
To avoid property damage, personal injury or death due to
electrical shock, this unit MUST have an uninterrupted,
unbroken electrical ground. The electrical ground circuit
may consist of an appropriately sized electrical wire
connecting the ground lug in the unit control box to the
building electrical service panel.
Other methods of grounding are permitted if performed
in accordance with the National Electric Code (NEC)
/American National Standards Institute (ANSI) /National
Fire Protection Association (NFPA) 70 and local/state
codes. In Canada, electrical grounding is to be in
accordance with the Canadian Electric Code (CSA) C22.1.
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When installing or servicing this equipment, safety
clothing, including hand and eye protection, is strongly
recommended. If installing in an area that has special
safety requirements (hard hats, etc.), observe these
requirements.
CAUTION
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WARNING
To prevent the risk of property damage, personal injury, or
death, do not store combustible materials or use gasoline
or other flammable liquids or vapors in the vicinity of this
unit.
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CARBON MONOXIDE POISONING HAZARD
Special Warning for Installation of Furnace or Air Handling
Units in Enclosed Areas such as Garages, Utility Rooms or
Parking Areas.
Carbon monoxide producing devices (such as an
automobile, space heater, gas water heater, etc.) should
not be operated in enclosed areas such as unventilated
garages, utility rooms or parking areas because of the
danger of carbon monoxide (CO) poisoning resulting from
the exhaust emissions. If a furnace or air handler is
installed in an enclosed area such as a garage, utility room
or parking area and a carbon monoxide producing device is
operated therein, there must be adequate, direct outside
ventilation.
This ventilation is necessary to avoid the danger of CO
poisoning which can occur if a carbon monoxide producing
device continues to operate in the enclosed area. Carbon
monoxide emissions can be (re)circulated throughout the
structure if the furnace or air handler is operating in any
mode.
CO can cause serious illness including permanent brain
damage or death.
DANGER
