GENERAL INFORMATION
B5SM air handlers are shipped from the factory ready for installation in a horizontal position. The units can be easily re- confi gured in the fi eld for vertical applications. The return air opening is interchangeable between the bottom of the unit and the top panel simply by switching the fi
This unit has been designed and tested for capacity and efficiency in accordance with A.R.I. Standards.This unit will provide many years of safe and dependable comfort, providing it is properly installed and maintained. With regular maintenance, this unit will operate reliably year after year. Abuse, improper use, and/ or improper maintenance can shorten the life of the appliance and create unsafe hazards.
Before You Install the Air Handler
√This equipment is securely packed at the time of shipment and upon arrival should be carefully inspected for damage prior to installing the equipment at the job site. Claims for damage (apparent or concealed) should be fi led immediately with the carrier.
√The cooling load of the area to be conditioned must be calculated and a system of the proper capacity selected.
√Check the electrical supply and verify the power supply is adequate for unit operation. The system must be wired and provided with circuit protection in accordance with local building codes. If there is any question concerning the power supply, contact the local power company.
√The air handler should be installed before routing the refrigerant tubing. Refer to the indoor unit’s installation instructions for installation details.
√Verify the air delivery of the/air handler is adequate to handle the static pressure drop of the coil, fi lter, and duct work.
√Please consult your dealer for maintenance information and availability of maintenance contracts. Please read all instructions before installing the unit.
Locating the Air Handler
•Survey the job site to determine the best location for mounting the unit.
•Overhead obstructions, poorly ventilated areas, and areas subject to accumulation of debris should be avoided.
•Consideration should be given to availability of electric power, service access, noise, and shade.
Field Connections for Electrical Power Supply
•All wiring must comply with current provisions of the National Electrical Code (ANSI/NFPA 70) and with applicable local codes having jurisdiction.
•The minimum size of electrical conductors and circuit protection must be in compliance with information listed on the outdoor unit data label.
•Electrical power supplied to the unit must be adequate for proper operation of the equipment.The system must be wired and provided with circuit protection in accordance with local building codes.
Air Ducts
This unit is designed only for use with a supply and return duct. Air ducts should be installed in accordance with the standards of the National Fire Protection Association Standard for Installation of Air Conditioning Systems (NFPA 90A), Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems (NFPA 90B), and all applicable local codes. NFPA publications are avaialable by writing to: National Fire Protection Association, Batterymarch Park, Quincy, ME 02269 or visit www.NFPA.org on the web.
•Design the duct work according to methods described by the Air Conditioning Contractors of America (ACCA).
•The return air duct must have the same free area as the opening provided on the blower coil unit.
•Duct work should be attached directly to the unit fl anges for horizontal and vertical applications. See Figures 4 or 5 (pages 10 or 11).
Unconditioned Spaces
All duct work passing through unconditioned space must be properly insulated to minimize duct losses and prevent condensation. Use insulation with an outer vapor barrier.Refer to local codes for insulation material requirements.
Acoustical Duct Work
Certain installations may require the use of acoustical lining inside the supply duct work.
•Acoustical insulation must be in accordance with the current revision of the Sheet Metal and Air Conditioning Contractors National Association (SMACNA) application standard for duct liners.
•Duct lining must be UL classifi ed batts or blankets with a fi re hazard classifi cation of
•Fiber duct work may be used in place of internal duct liners if the fi ber duct work is in accordance with the current revision of the SMACNA construction standard on fi brous glass ducts. Fibrous duct work and internal acoustical lining must be NFPA Class 1 air ducts when tested per UL Standard 181 for Class 1 ducts.
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