Nordyne B5SM-090 User Manual
B5SM -090/120 SERIES
Installation Instructions
LIGHT COMMERCIAL AIR HANDLER
Vertical Application
Horizontal Application - Rear View Horizontal Application - Front View
IMPORTANT
Please read this information thoroughly and become familiar with the capabilities and
use of your appliance before attempting to operate or maintain this unit. Keep this
literature where you have easy access to it in the future. If a problem occurs, chec k the
instructions and follow recommendations given. If these suggestions don’t eliminate
your problem, call your servicing contractor.
These instructions are primarily intended to assist qualifi ed individuals experienced in
the proper installation of this appliance. Some local codes require licensed installation/
service personnel for this type of equipment. Please read all instructions carefully
before starting the installation.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
Important Safety Information ....................................3
General Information ...................................................4
Before You Install this Unit .........................................4
Locating the Air Handler ............................................4
Field Connections for Electrical Power Supply ..........4
Air Ducts ....................................................................4
Unconditioned Spaces ...........................................4
Acoustical Duct Work .............................................4
Air Handler Installation ..............................................5
Packaging Removal ...................................................5
Minimum Clearance Requirements ...........................5
Horizontal Mounting Applications ..............................5
Vertical Mounting Applications ..................................5
Condensate Drain ....................................................5
Connecting Refrigerant Tubing ..................................5
Filter Requirements ..................................................6
Electrical Wiring ..........................................................7
Pre - Electrical Checklist ...........................................7
Line Voltage ...............................................................7
Thermostat Connections ...........................................7
Electrical Wiring with a Duct Heater ..........................7
Unbalanced 3-Phase Supply Voltage ........................8
Grounding..................................................................8
Startup & Adjustments ..............................................8
Pre - Start Checklist ..................................................8
Motor Sheave Adjustment .........................................8
Pulley Alignment ........................................................9
Belt Tensioning ..........................................................9
Blower Adjustments ...................................................9
Unit Maintenance ........................................................9
Figures & Tables .......................................................10
Figure 4. Physical Dimensions - Horizontal ..........10
Figure 5. Physical Dimensions - Vertical ..............11
Table 4. Blower Performance Data .......................12
Electrical Information ...............................................13
Figure 6. B5SM Wiring Diagram ...........................13
Figure 7. Air conditioner T-stat Connections .........14
Figure 8. Heat pump T-stat Connections ..............15
Figure 9. Maintenance Schedule .........................16
2
IMPORTANT SAFETY INFORMATION
Safety markings are used frequently throughout this
manual to designate a degree or lev el of seriousness and
should not be ignored. WARNING indicates a potentially
hazardous situation that if not avoided, could result in
personal injury or death. CAUTION indicates a potentially
hazardous situation that if not avoided, ma y result in minor
or moderate injury or property damage.
WARNING:
W ARNING:
The safety information listed below must
be followed during the installation, service,
and operation of this unit. Unqualified
individuals should not attempt to interpret these
instructions or install this equipment. Failure
to follow safety recommendations could result
in possible damage to the equipment, serious
personal injury or death.
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard
Evaporator coils are shipped from the factory
with a nitrogen charge. Use caution when
preparing coils for fi eld connections. If repairs
make it necessary for evacuation and char ging,
it should only be attempted by qualified,
trained personnel thoroughly familiar with this
equipment. Some local codes require licensed
installation service personnel to service this
type of equipment. Under no circumstances
should the equipment owner attempt to install
and/or service this equipment. Failure to comply
with this warning could result in equipment
damage, personal injury, or death..
1
0
0
1 Slight Hazard
W ARNING:
Improper installation, service, adjustment,
or maintenance may cause explosion, fi re,
electrical shock or other hazardous conditions
which may result in personal injury or property
damage. Unless otherwise noted in these
instructions, only factory authorized kits or
accessories may be used with this product.
W ARNING:
Unless otherwise noted in these instructions,
only factory authorized kits or accessories may
be used with or when modifying this product.
• The installer must comply with all local codes and
regulations which govern the installation of this type
of equipment. Local codes and regulations take
precedence over any recommendations contained in
these instructions. Consult local b uilding codes and the
National Electrical Code (ANSI CI) for special installation
requirements.
• This equipment contains liquid and gaseous refrigerant
under high pressure. Installation or servicing should only
be performed by qualifi ed trained personnel thoroughly
familiar with this type equipment.
• All electrical wiring must be completed in accordance
with local, state and national codes and regulations
and with the National Electric Code (ANSI/NFPA 70)
or in Canada the Canadian Electric Code Part 1 CSA
C.22.1.
• Installation of equipment may require brazing operations.
Installer must comply with safety codes and wear
appropriate safety equipment (safety glasses, work
gloves, fi re extinguisher , etc.) when performing brazing
operations.
• Install this unit only in a location and position as specifi ed
on pages 4 & 5. This unit is designed only for Indoor
installations and should be located with consideration
of minimizing the length of the supply and return ducts.
See Table 4 (page 12) and the rating plate for proper
circulating airfl ow data
• Consideration should also be given to the accessibility
of fuel, electric power, service access, noise, and shade.
Physical dimensions for each type of installation is
shown on pages 10 & 11. See Figure 4 for horizontal
installations or Figure 5 for Vertical installations.
• Follow all precautions in the literature, on tags, and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
3
GENERAL INFORMATION
B5SM air handlers are shipped from the factory ready for
installation in a horizontal position. The units can be easily reconfi 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 lter-rack with the return
air cover panel. For either confi guration, suffi cient clearance
must be provided on the sides of the unit to allow access for
servicing the blower, motor, coil assembly, and fi lters.
This unit has been designed and tested for capacity and effi ciency
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 y ear. 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 pack ed 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 an y 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.
V erify 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 av ailability of electric power,
service access, noise, and shade.
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 (NFP A 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 FHC-25/50 or
less.
• 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.
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.
4
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 fi lters, blower assembly, and,
controls. Allow 24 inches minimum clearance from the
front of the motor and refrigerant access panels for
service and maintenance. How e v er 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 suppor ted
with 3/8” full threaded support rods, howe ver all mounting
hardware must be fi eld 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. Alwa ys 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
V erify 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 confi gured 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 confi gured 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.
Connecting Refrigerant Tubing
WARNING:
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard
Evaporator Coils are factory shipped with a
nitrogen charge. A void direct face e xposure or
contact with valve when gas is escaping. Always
ensure adequate ventilation is present during
the depressurization process. Any uncertainties
should be addressed before proceeding.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be fl owing through the
joints during brazing. This will prevent internal oxidation
and scaling from occurring.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing.
• Refrigerant tubing should be suppor ted in a manner
that the tubing will not vibrate or abrade during system
operation.
• Tubing should be kept clean of foreign debris during
installation.
• Every effort should be made by the installer to ensure
that the fi eld installed refrigerant containing components
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• Always refer to the installation instructions supplied with
the outdoor unit for piping requirements. The suction
and liquid lines must be sized in accordance with the
condensing unit specifi cations.
• If precise forming of refrigerant lines is required, a copper
tubing bender is recommended. A void sharp bends and
contact of the refrigerant lines with metal surfaces.
• A fi lter dryer is provided with the unit and must be
installed in the liquid line of the system. If the installation
replaces a system with a fi lter dryer already present
in the liquid line, the fi lter dryer must be replaced with
the one supplied with the unit. The fi lter dryer must be
installed in strict accordance with the manufacturer’s
installation instructions.
• B5SM air handlers are supplied with a direct expansion
refrigerant coil and thermostatic expansion valves.
Refrigerant line connections are located on the motor
side (service side) of cabinet and require sweat
connections.
1
0
0
1 Slight Hazard
5
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