Reznor B5SM Unit Installation Manual - Manual (Page 4)

4
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), Manual Q.
• 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 flanges 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 classified batts or blankets with a fire
hazard classification of FHC-25/50 or less.
• Fiber duct work may be used in place of internal duct liners if
the fiber duct work is in accordance with the current revision
of the SMACNA construction standard on fibrous 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.
AIr HAnDLEr InstALLAtIon
Packaging removal
Remove the shipping crate and User’s Manual from
the equipment. Take care not to damage the tubing
connections when removing the crate.
Minimum Clearance requirements
This air handler must be installed with ample
clearance for easy access to the air filters, blower
assembly, and, controls. Allow 24 inches minimum
clearance from the front of the motor and refrigerant
access panels for service and maintenance.
However 36 inches is strongly recommended.
Horizontal Mounting Applications
B5SM air handlers can be suspended from support
rods at each corner and are supplied with the
required 1/2-13 NC hardware. The installer only
needs to supply the ½” full threaded support
rods in an appropriate length for their application.
notE: These units can be supported with 3/8”
full threaded support rods, however all mounting
hardware must be field supplied. Once in position,
verify the unit is level. See Figure 4 (page 10).
CAutIon:
When raising the air-handler for horizontal
mounting, always use safe lifting methods
and equipment. Always support the unit
along its entire width. Failure to do so may
result in damage to the lower panels or
other equipment. If determined safe for
your application the shipping pallet may
be utilized with a forklift for this operation.
Vertical Mounting Applications
Verify the unit is level and there is adequate
clearances to service the unit and provide the
minimum 2” trap needed for the condensate drain.
See Figure 5 (page 11).
Condensate Drain
B5SM air handlers have condensate drain ports on
both sides of the unit, and may be configured for
drainage from the left, right or both sides (Figures
4 or 5). Connection to the drains can be made with
a ¾” threaded PVC adapter.
Units are configured at the factory with the service
side drain open and a threaded PVC drain plug
installed on the opposite side. Each drain line
installed requires its own drain trap. To ensure
proper drainage, the installed drain trap(s) must
provide a minimum trap of 2 inches.
notE: It is
recommended that a secondary drain pan be used
when the unit is hung above an enclosed ceiling.