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, check 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 qualified 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
Safety markings are used frequently throughout this
manual to designate a degree or level 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
hazardoussituationthatifnotavoided,mayresultinminor
or moderate injury or property damage.
WARNING:
The safety information listed below must
be followed during the installation, service,
and operation of this unit. Unqualified
individualsshouldnotattempttointerpretthese
instructions or install this equipment. Failure
to follow safety recommendations could result
in possible damage to the equipment, serious
personal injury or death.
WARNING:
• 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 building codes and the
NationalElectricalCode(ANSICI)forspecialinstallation
requirements.
• Thisequipmentcontainsliquidandgaseousrefrigerant
underhighpressure.Installationorservicingshouldonly
be performed by qualified 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.
• Installationofequipmentmayrequirebrazingoperations.
Installer must comply with safety codes and wear
appropriate safety equipment (safety glasses, work
gloves, fire extinguisher, etc.) when performing brazing
operations.
• Installthisunitonlyinalocationandpositionasspecified
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 airflow data
• Consideration should also be given to the accessibility
offuel,electricpower,serviceaccess,noise,andshade.
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.
NITROGEN
HEALTH
1
FLAMMABILITY
0
0
REACTIVITY
0 Minimal Hazard
1 Slight Hazard
Evaporator coils are shipped from the factory
with a nitrogen charge. Use caution when
preparing coils for field connections. If repairs
makeitnecessaryforevacuationandcharging,
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/orservicethisequipment.Failuretocomply
with this warning could result in equipment
damage, personal injury, or death..
WARNING:
Improper installation, service, adjustment,
or maintenance may cause explosion, fire,
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.
WARNING:
Unless otherwise noted in these instructions,
onlyfactoryauthorizedkitsoraccessoriesmay
be used with or when modifying this product.
3
GENERAL INFORMATION
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
AirConditioningSystems(NFPA90A),Standardfor
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,BatterymarchPark,Quincy,ME02269
or visit www.NFPA.org on the web.
B5SM air handlers are shipped from the factory ready for
installation in a horizontal position. The units can be easily re-
configured in the field for vertical applications. The return air
opening is interchangeable between the bottom of the unit and
the top panel simply by switching the filter-rack with the return
air cover panel. For either configuration, sufficient clearance
must be provided on the sides of the unit to allow access for
servicing the blower, motor, coil assembly, and filters.
Thisunithasbeendesignedandtestedforcapacityandefficiency
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.
• 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
flanges for horizontal and vertical applications.
See Figures 4 or 5 (pages 10 or 11).
BeforeYou Install the Air Handler
Thisequipmentissecurelypackedatthetimeofshipmentand
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 filed 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
providedwithcircuitprotectioninaccordancewithlocalbuilding
codes. If there is any question concerning the power supply,
contact the local power company.
Theairhandlershouldbeinstalledbeforeroutingtherefrigerant
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, filter, and duct work.
Please consult your dealer for maintenance information
and availability of maintenance contracts. Please read all
instructions before installing the unit.
Unconditioned Spaces
All duct work passing through unconditioned space
must be properly insulated to minimize duct losses
and prevent condensation. Use insulation with an
outervaporbarrier.Refertolocalcodesforinsulation
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.
• DuctliningmustbeULclassifiedbattsorblankets
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.
Locating the Air Handler
• Surveythejobsitetodeterminethebestlocationformounting
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.
• Theminimumsizeofelectricalconductorsandcircuitprotection
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
Connecting Refrigerant Tubing
Remove the shipping crate and User’s Manual from the
equipment.Takecarenottodamagethetubingconnections
when removing the crate.
WARNING:
NITROGEN
HEALTH
1
0
0
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.
FLAMMABILITY
REACTIVITY
0 Minimal Hazard
1 Slight Hazard
Evaporator Coils are factory shipped with a
nitrogen charge. Avoid direct face exposure or
contactwithvalvewhengasisescaping.Always
ensure adequate ventilation is present during
thedepressurizationprocess.Anyuncertainties
should be addressed before proceeding.
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).
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be flowing through the
joints during brazing.This will prevent internal oxidation
and scaling from occurring.
CAUTION:
• 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 supported in a manner
that the tubing will not vibrate or abrade during system
operation.
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
damagetothelowerpanelsorotherequipment.
If determined safe for your application the
shipping pallet may be utilized with a forklift
for this operation.
• Tubing should be kept clean of foreign debris during
installation.
• Every effort should be made by the installer to ensure
thatthefieldinstalledrefrigerantcontainingcomponents
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• Alwaysrefertotheinstallationinstructionssuppliedwith
the outdoor unit for piping requirements. The suction
and liquid lines must be sized in accordance with the
condensing unit specifications.
• Ifpreciseformingofrefrigerantlinesisrequired,acopper
tubingbenderisrecommended.Avoidsharpbendsand
contact of the refrigerant lines with metal surfaces.
• A filter dryer is provided with the unit and must be
installedintheliquidlineofthesystem.Iftheinstallation
replaces a system with a filter dryer already present
in the liquid line, the filter dryer must be replaced with
the one supplied with the unit. The filter dryer must be
installed in strict accordance with the manufacturer’s
installation instructions.
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.
• 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.
5
6.Re-installthefilterslideassemblybackintothefilterrack
frame and secure with the 4 screws removed earlier. If
replacing factory supplied filters with disposable filters,
use only 2” disposable filters.
• The B5SM-120 air handler has a dual circuit coil and
the B5SM-090 has a single circuit coil.
• The B5SM-120 air handler is charged through service
valves on the end of the liquid tube for each circuit.
These must be removed before brazing the line sets.
The B5SM-090 is charged through a service valve
inside the unit, which should not be removed.
• BeforebrazingtheB5SM-090,removethecorefrom
the service port. Failure to do this may result in a leak
at the service valve. Replace the core and cap once
brazing is complete.
Accessing the filters does not require tools and can be
performedfromeithersideofthefilter-rack.Ontheservice
side of the unit, locate the release knob at the base of
the filter rack and rotate clockwise to unlock, then pull up
and out to remove the filter access panel. On the blower
side, use the same method but rotate counter-clockwise
to unlock.
• Optional equipment such as liquid line solenoid valves,
lowambient,etc.,shouldbeinstalledinstrictaccordance
with the manufacturer’s installation instructions.
Filter
Model
B5SM
Nominal
CFM
Resistance
(W.C.)
Size
Filter Requirements
2200
2600
3000
3400
3800
4200
3000
3400
3800
4200
4600
5000
0.03
0.04
0.05
0.07
0.08
0.09
0.05
0.07
0.08
0.09
0.11
0.13
B5SM air handlers are shipped with three permanent
1” filters; however the filter rack can be converted to
accommodate a 2” filter. To convert to a 2” filter:
1. Remove all filters from the unit.
2.Locate and remove the 4 screws (Figure 1) holding
the bottom filter slide assembly (latch end) to the filter
rack frame. NOTE: Be careful when removing the slide
assemblysoitdoesnotdropintounitandcausedamage
to the coil.
090
120
18 x 24 (1”)
18 x 24 (1”)
3.Remove the 4 screws securing the “L” bracket to the
“Z” bracket.
4.Rotate the “L” bracket 180 degrees, and reposition it so
it mounts flush with the “Z” bracket. See Figure 1.
5.Secure the filter slide assembly together with the four
screws.
Table 1. Pressure Drop Across Filters
FILTER BRACKET
LOCATION
BRACKET CONFIGURATION
FOR 1” FILTER APPLICATIONS
(FACTORY SETTING)
BRACKET CONFIGURATION FOR
2” FILTER APPLICATIONS
FILTERS
“Z” BRACKET
“L” BRACKET
REMOVE 4 SCREWS FROM
FILTER RACK FRAME
REMOVE 4 SCREWS SECURING
“Z” BRACKET AND “L” BRACKET
Figure 1. Converting from 1” Filter to 2” Filter Applications
MODEL
VOLTAGE
208-230/460
208-230
PHASE
Hz
60
60
FLA
HP
2
MCA
MOP
15
-090 & -120 J
-090 & -120 K
3
1
6.6-6.6/3.3
11.3-10.0
8.3-8.3/4.2
14.2-12.5
2
25-20
FLA = Full Load Amps, MCA = Minimum Circuit Ampacity, MOP = Maximum Over-Current Protection
Table 2. Electrical Rating Data
6
ELECTRICAL WIRING
schematic before making any electrical connections to
the unit. See Figure 6 (page 13).
• These air handlers can be purchased in both single
and three phase power configurations, all single phase
equipment is shipped from the factory ready for field
connections. For electrical connection locations see
Figures 4 or 5 (pages 10 or 11).
• Three phase units are shipped from the factory pre-
configured for high voltage operation.The 460 volt, 60
hertz units may be reconfigured in the field for the other
voltagesindicatedontheunitratinglabel.Foradditional
MaximumCurrentAmpacity(MCA), orMaximumOver-
current Protection (MOP) information, refer to the unit
ratinglabel.Forproperhighvoltagewiringorotherwiring
requirements refer to the Wiring Diagram (Figure 6).
• Internallymountedcircuitbreakersareavailableasfield
installed options. These circuit breakers can be used
as an electrical disconnect.
WARNING:
To avoid risk of electrical shock, personal
injury, or death, disconnect all electrical power
to the unit before performing any maintenance
or service. The unit may have more than one
electrical supply.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause
improper and dangerous operation.
• Electrical connections must be in compliance with
all applicable local codes and ordinances, and with
the current revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations, the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
Thermostat Connections
• Thermostatconnectionsshallbeinaccordancewiththe
instructionssuppliedwiththethermostatandtheindoor
equipment. The low voltage wires must be properly
connected to the units low voltage terminal block.
• A single stage thermostat is used with this equipment
and must operate in conjunction with any installed
accessories. A typical AC and air handler hookup is
shown in Figure 7 (page 14). For heat pump and air
handler connections, see Figure 8 (page 15).
• The thermostat should be mounted about 5 feet above
theflooronaninsidewall.DONOTinstallthethermostat
on an outside wall or any other location where its
operationmaybeadverselyaffectedbyradiantheatfrom
fireplaces, sunlight, or lighting fixtures, and convective
heat from warm air registers or electrical appliances.
Refertothethermostatmanufacturer’sinstructionsheet
for detailed mounting and installation information.
Pre-Electrical Checklist:
Verify that the voltage, frequency, and phase of the
supplysourcematchthespecificationsontheunitrating
plate. The label is located near the refrigerant lines.
Verify that the service provided by the utility is sufficient
tohandletheadditionalloadimposedbythisequipment.
Phasebalanceon3phaseunitsmustalwaysbechecked.
See Unbalanced 3-Phase Supply Voltage (page 8).
Line Voltage
• It is recommended that the line voltage to the unit be
supplied from a dedicated branch circuit containing the
correct fuse or circuit breaker for the unit.
• Anelectricaldisconnectmustbelocatedwithinsight
of and readily accessible to the unit.This switch shall
becapableofelectricallyde-energizingtheoutdoorunit.
See unit data label for proper incoming field wiring.Any Electrical Wiring with a Duct Heater
other wiring methods must be acceptable to authority Slip-in duct heaters are available as an accessory with
having jurisdiction.
• Refer to the unit wiring label for proper high and low These heaters mount in the supply duct external to the
voltage wiring.
air handler. The heater kits are available in 10, 16, 26,
the B5SM air handler. See Table 3 for available sizes.
• Use only copper wire for the line voltage power supply and 36 KW sizes and 240 or 460 voltages. All heater kits
to this unit (Table 2, page 6). Use proper code agency are set up for three phase operation. To wire the heater
listed conduit and a conduit connector for connecting kits to the B5SM air handler unit, refer to the Installation
the supply wires to the unit.
Instructions supplied witht he kit.
• Overcurrent protection must be provided at the branch
circuit distribution panel and sized as shown on the unit
rating label and according to applicable local codes.
See the unit rating plate for maximum circuit ampacity
and maximum overcurrent protection limits.
• If replacing any of the original wires supplied with the
unit,thereplacementwiremustbecopperwireconsisting
of the same gauge and temperature rating.
SKU
Kw
10
10
16
16
26
26
36
36
Volts/Phase/Hz
208-240/3/60
480/3/60
MODEL
559428
559429
559430
559431
559432
559433
559434
559435
H7HK010Q-01
H7HK010S-01
H7HK016Q-01
H7HK016S-01
H7HK026Q-01
H7HK026S-01
H7HK036Q-01
H7HK036S-01
208-240/3/60
480/3/60
208-240/3/60
480/3/60
• Provide power supply for the unit in accordance with
the unit wiring diagram, and the unit rating plate. The
installershouldbecomefamiliarwiththewiringdiagram/
208-240/3/60
480/3/60
Table 3. Duct Mount Heater Kit Models
7
Unbalanced 3-Phase Supply Voltage
Grounding
Voltageunbalanceoccurswhenthevoltagesofallphases
of a 3-phase power supply are no longer equal. This
unbalance reduces motor efficiency and performance.
Someunderlyingcausesofvoltageunbalancemayinclude:
Lackofsymmetryintransmissionlines,largesingle-phase
loads, and unbalanced or overloaded transformers. A
motor should never be operated when a phase imbalance
in supply is greater than 2%.
WARNING:
The unit cabinet must have an uninterrupted or
unbrokenelectricalgroundtominimizepersonal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground!
This unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the National Electrical Code (ANSI/NFPA 70) or the CSA
C22.1 Electrical Code. Use the grounding lug provided in
the control box for grounding the unit.
Perform the following steps to determine the percentage
of voltage imbalance:
1.M e a s u r e t h e l i n e
Example:
voltages of your 3-phase
power supply where it
enters the building and
STARTUP AND ADJUSTMENTS
AB = 451V
Pre-Start Check List
at a location that will
BC = 460V
Prior to start-up, complete the following inspection:
Verify the unit is level and condensate can drain.Check
condensate drain line(s) for proper slope and trap.
Verify the air handler is mounted securely.
Verify the surrounding area and top of the unit is free
from obstructions and debris.
Check all ductwork connections. Make sure the duct
work is adequetly sealed to prevent air leakage.
Check all coil connections for leaks.
Verify that the line voltage power leads are securely
connected and the unit is properly grounded.
Verifythatthelowvoltagewiresaresecurelyconnected
to the correct leads on the low voltage terminal strip.
Make sure the thermostat is wired correctly.
Verifytheblowerrotatesproperly.Checktheblowerbelt
between the pulleys for proper tension and alignment.
Verify the power supply branch circuit overcurrent
protection is sized properly.
only be dedicated to the
AC = 453V
unit installation. (at the
units circuit protection or
disconnect).
2.Determine the average voltage in the power supply.
In this example, the measured line voltages were
451, 460, and 453.The average would be 454 volts
(451 + 460 + 453 = 1,364 / 3 = 454).
3.Determine the maximum deviation:
Example:
From the values given in step 1, the BC voltage
(460V) is the greatest difference in value from
the average:
Highest Value
460 - 454 = 6
454 - 451 = 3
454 - 453 = 1
Verify all filters are in place and all equipment access/
control panels are in place
Motor Sheave Adjustment
The motor sheave consists of an outer, moveable pulley
face and an inner stationary face. To adjust the motor
sheave,
4.Determine percent of
Example:
6
voltage imbalance by
using the results from
steps2&3inthefollowing
equation.
1.Relieve the belt pressure by loosening motor mount
bolts and the belt tensioning bolts on the motor mount.
2.Move the blower fan belt out of the way (if necessary)
and loosen the set screw in the outer sheave face.
3.Rotate the face in increments of one half or full turns
only. NOTE: This maintains the set screw position
precisely over the flats on the pulley hub. Rotating the
sheave clockwise (when viewed from the lead end of
motor - opposit end of shaft) will make the blower run
slower which decreases airflow. Rotating the sheave
counter clockwise (as viewed from lead end) will cause
the blower to speed up.
x
= 1.32%
100
454
max voltage deviation
from average voltage
% Voltage Imbalance
= 100 x
average voltage
The amount of phase imbalance (1.32%) is satisfactory
since the amount is lower than the maximum allowable
2%. Please contact your local electric utility company if
your voltage imbalance is more than 2%.
4.Tighten the setscrews after the desired adjustment has
been made and verify the moveable face is properly
secured.
8
Pulley Alignment
necessary to change the factory set speed. Adjustment
Inspect the pulley alignment between the motor sheave of the blower speed is made through varying the pitch of
and blower pulley. If a misalignment occurs, adjust the the motor pulley, this adjustment allows for a wide range
location of the motor sheave by loosening the set-screw of installation applications. Refer to Table 4 (page 12) for
in the stationary face of the motor sheave. Relocate the blower performance data.
sheave assembly on the motor shaft to ensure the belt will
be straight and aligned (Figure 2). Tighten the set-screw
and then reinstall the fan belt.Tighten the tensioning bolts
Neverperformmaintenanceonenergizedorrotating
as described below.
WARNING:
equipment.Alwaysdisconnectelectricalpowerand
Belt Tensioning
allowallrotatingequipmenttostopbeforeservicing
the unit. Failure to do so may result in personal
injury, loss of limb, or death from electrical shock
or entanglement in moving parts.
Proper belt tension can be determined by testing the
belt deflection at the midpoint of the pulleys. The belt
should deflect ¼” per foot of span between the centers
of the pulleys (Figure 3). After the proper tension has
been applied, tighten the motor mount bolts to secure
the assembly, and visually inspect the area to ensure all
tools have been removed. Inspect all wire harness and
routings in the vicinity and make sure there is adequate
clearance for the wire harness.
UNIT MAINTENANCE
The maintenance information listed below should be
performed in accordance with the Maintenance Schedule
shown in Figure 9 (page 16).
Blower Adjustments - 3 phase units only
Filters
If blower is turning opposite of arrow direction, disconnect
all power to unit and allow all rotating equipment to stop,
then interchange any two field wired leads at the terminal
block OR disconnect connections.
To clean permanent filters, remove the filters and wash
gently with mild soap and water.Rinse in clean, hot water
and allow to drain & dry thoroughly before reinstalling.
Drain Pan
The blower speed has been preset at the factory. For
optimum system performance and comfort, it may be
Thedrainpanandthedrainlinesshouldbecleanedtoallow
condensate to drain properly. Remove any accumulation
of residue or sludge from the drain pan. Inspect in and
around the drain pan for rust, holes, and leaks.
V-Belts
Inspectforcracks,tears,andexcessiveorabnormalwear.
V-belts tend to elongate over time with normal application
and use. Ensure the belt always maintains adequate
tension without over tightening. Belts which have been
over tightened will wear out rapidly and may cause motor
and blower bearings to receive undue strain and wear.
As a result the unit could experience excessive vibration
and noise problems.
Blower Bearings
Theblowerassemblyincorporatessealedbearings.Under
normaloperatingconditions,nomaintenanceisnecessary
for the life of the equipment.
Figure 2. Proper Belt Alignment
Blower Fan Wheel
Inspect the blower wheel blades for accumulations of dirt
and clean if necessary.Inspect mounting nut for tightness
when done.
1/4 inch
Blower Motor and Assembly
Inspect the blower assembly and motor mounting
brackets for tightness and corrosion.Correct deficiencies
if neccessary.The blower motor contains sealed bearings
and under normal operating conditions, no maintenance
is necessary for the life of the equipment.
Figure 3. Proper Belt Tension
9
FIGURES & TABLES
3/4"
Field Installed Hanging Rods
47 5/8" Center to Center
1 1/4"
2 7/32"
C
23 13/16" of Unit
L
C
1"
of Gravity
L
Electrical Connections
Air Flow
Electrical Connections
Air Flow
13 5/8"
8 3/16"
6 3/4"
4 3/4"
15 11/16"
5 11/16"
15 9/16"
17 11/16"
17 13/16"
4 3/8"
4 3/16"
7 1/2 Ton Unit Refrigerant Line Connections
(Top View Shown with Doors Removed)
10 Ton Unit Refrigerant Line Connections
(Top View Shown with Doors Removed)
Field Installed Hanging Rods
57"Center to Center
C
28 1/2" of Unit
L
C
3" of Gravity
L
Electrical
Knock-outs
Front View
16 1/4"
Condensate
Drain
22 1/16"
18 13/16"
19 3/8"
Supply Duct
60 1/4" Cabinet Width
1 5/8"
1 5/8"
57" Filter Rack Frame
53" Return Duct Opening
2 3/16"
23"
25 1/16"
Return
27 3/8"
Cabinet
Height
Filter
Rear View
Duct
Rack
Opening
2 3/16"
Figure 4. B5SM Physical Dimensions for Horizontal Installations
10
18 13/16"
Supply Duct
19 3/8"
22 1/16"
16 1/4"
Electrical
Knock-outs
Top View
27 3/8"Cabinet Depth
(without Filter Rack)
60 1/4" Cabinet Width
16 1/4" Supply
Duct Opening
18 13/16" Supply
Duct Opening
19 3/8"
22 1/16"
9 1/8"
2
Electrical
Connections
53 1/4"
Cabinet
Height
25 1/16"
Filter Rack
Frame
23" Return
Duct Opening
Condensate
Drain
5 1/16"
29 5/16" Depth
(with Filter Rack)
53" Return Duct Opening
57" Filter Rack Frame
Front View
Side View
Figure 5. B5SM Physical Dimensions for Vertical Installations
11
AIRFLOW DATA
Table 4. Blower Performance Data
12
ELECTRICAL INFORMATION
2 0 8
-
2 3 0
4 6 0
2 0 8 - 2 3 0
4 6 0
Figure 6. Wiring for Single and Three Phase Units
13
NOTE: C &W2 to be connected to electric heat.
TO FIELD
SUPPLIED DISCONNECT
GND
SINGLE STAGE
HEAT/COOL THERMOSTAT
L1
R W C G
Y
L2
L3
BLOWER
MOTOR
FREEZESTAT
GREEN
BLACK
BROWN
G
C
W2
W1
O
C
See Note
Y
R
Y
R
BLACK
TERMINAL
BOARD
AIR HANDLER
SECTION
OUTDOOR
SECTION
SINGLE STAGE HEAT/COOL THERMOSTAT- NO ECONOMIZER
NOTES:
1. C & W2 to be connected to electric heat.
2. Remove BLACK wire from air handler low voltage terminal board
Y terminal and connect to YELLOW wire from economizer.
3. 2nd Stage refrigerant cooling with optional economizer installed. A 2
stage thermostat is required for simultaneous operation of the economizer
and refrigerant system. Connect Y2 from 2 stage thermostat to BLUE
wire from economizer. If installing an economizer in this unit, refer to the
Economizer installation instructions for proper set up and operation.
4. Heat Pump Economizer Relay. For heat pump applications only, connect B
from thermostat to GREY wire from Economizer. Required for proper operation
of an economizer (optional) in the heat pump Heating mode. If installing an
economizer in this unit, refer to the Economizer installation instructions for
proper set up and operation.
TO FIELD
SUPPLIED DISCONNECT
GND
SINGLE STAGE
HEAT/COOL
THERMOSTAT
L1
L2
R
W
C
G
Y
L3
BLOWER
MOTER
W7459A
TR
GRY-90”
TB-11
M7415A
TR
A
7
B
9
GRN-18”
GRN-18”
Note 4
FREEZESTAT
BLACK
TR 1
GRY
B
BLK-12”
TR1
BLACK
Y1
YEL
VIO-14”
BLU-14”
S
o
4
1
6
3
Note 2
s
GREEN
G
C
JUMPER
WIRE
C7400A
GRN
BLK
S
r
C
5
W2
W1
O
Y
R
YEL-18”
Note 1
2
4
1
3
1S
WHITE
ORN
BLUE
RED
RED
2K
Y
R
T
RED-12”
GRY-12”
Y2
Note 3
1S
MA
T1
TERMINAL
BOARD
T
P
T1
P1
AIR HANDLER
SECTION
C7150
M.A.S.
P1
BLK-12”
BLU-12”
MIN.
OPTIONAL
ECONOMIZER
P
POT.
OUTDOOR
SECTION
SINGLE STAGE HEAT/COOL THERMOSTAT- WITH ECONOMIZER
Figure 7.Typical Air conditioner Thermostat Connections
14
NOTES:
TO FIELD
SUPPLIED DISCONNECT
1. Jumper between W2 and E is required.
2. C &W2 to be connected to electric heat.
GND
SINGLE STAGE
HEAT PUMP THERMOSTAT
L1
R
O
W2
E
C
G
Y
B
L2
L3
NOTE 1
BLOWER
MOTER
FREEZESTAT
BROWN
GREEN
G
BLACK
NOTE 2
C
W2
O
R
Y
C
W2
O
R
BLACK
Y
W1
TERMINAL
BOARD
AIR HANDLER
SECTION
OUTDOOR
SECTION
TYPICAL HEAT PUMP THERMOSTAT CONNECTION (NO ECONOMIZER)
NOTES:
1. Jumper between W2 and E is required.
2. C & W2 to be connected to electric heat.
3. Remove BLACK wire from air handler low voltage terminal board
Y terminal and connect to YELLOW wire from economizer.
4. 2nd Stage refrigerant cooling with optional economizer installed. A 2
stage thermostat is required for simultaneous operation of the economizer
and refrigerant system. Connect Y2 from 2 stage thermostat to BLUE
wire from economizer. If installing an economizer in this unit, refer to the
Economizer installation instructions for proper set up and operation.
5. Heat Pump Economizer Relay. Connect B from thermostat to GREY
wire from Economizer. Required for proper operation of an economizer
(optional) in the heat pump Heating mode. If installing an economizer in
this unit, refer to the Economizer installation instructions for proper set
up and operation.
TO FIELD
SUPPLIED DISCONNECT
GND
SINGLE STAGE
HEAT PUMP THERMOSTAT
L1
C
G
R
O
W2
E
Y
B
L2
L3
NOTE 1
BLOWER
MOTER
W7459A
TR
GRY-90”
TB-11
M7415A
TR
A
7
B
GRN-18”
GRN-18”
NOTE 5
9
TR 1
FREEZESTAT
GREY
B
BLK-12”
TR1
BLACK
BROWN
Y1
YELLOW
VIO-14”
BLU-14”
S
o
4
1
6
3
NOTE 3
s
GREEN
BLACK
JUMPER
WIRE
G
C
C7400A
GREEN
BLACK
S
r
C
W2
W2
O
5
O
YEL-18”
NOTE 2
2
1
R
Y
R
Y
1S
WHITE
ORANGE
2K
3
4
T
RED-12”
GRY-12”
Y2
BLUE
RED
RED
NOTE 4
W1
TERMINAL
BOARD
1S
MA
T1
T
P
T1
P1
C7150
M.A.S.
P1
OUTDOOR
SECTION
AIR HANDLER
SECTION
BLK-12”
BLU-12”
OPTIONAL
ECONOMIZER
MIN.
P
POT.
TYPICAL HEAT PUMP THERMOSTAT CONNECTION (WITH ECONOMIZER)
Figure 8.Typical Heat Pump Thermostat Connections
15
Installed by:
Date Installed:
Maintenance Task
Performance
Schedule
Date Performed:
W
M
SA
A
Air Filters
Inspect, clean or replace as required.
x
Condensate Drain(s) & Pan
Clean condensate drain pan
Inspect the flow of condensate through
the drain lines. Clean or Correct
problems as necessary.
x
x
Blower Assembly
Inspect the fan belt for wear, alignment
& and proper tension. Replace or adjust
as required.
x
Clean the blower wheel and housing.
x
x
x
x
Inspect the blower assembly for
corrosion and all hardware for security.
Inspect the blower coil unit casing for
corrosion and loose fasteners.
Coils
Inspect the coil fins for excessive dirt or
damage. Clean or repair if required.
Inspect all coil connections for leaks.
x
Air Handler Assm.
Inspect Mounting Hardware for security
and corrosion
Inspect Filter Rack mounting hardware
for security
Inspect panel assemblies for proper
installation and security
x
x
x
Figure 9. Maintenance Schedule
NOTE: The schedule above is for normal duty applications only. For severe duty applications, adjust schedule as appropriate. Additional tasks may be required
for severe duty applications.
The installer performing this work assumes all responsibility for this installation.Safety should always be the deciding factor when
installing this product and using common sense plays an important role as well. Improper installation of the components or failure
to follow safety warnings could result in serious injury, death, or property damage. After completing the installation, return these
instructions to the equipment owner’s package for future reference.
¢7090950K¤
7090950
Specifications and illustrations subject to change
without notice or incurring obligations.
O’Fallon MO
7090950
Printed in U.S.A. (01/10)
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