Nordyne Air Conditioner 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, 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 3/8full 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  
thattheeldinstalledrefrigerantcontainingcomponents  
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-installthelterslideassemblybackintothelterrack  
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  
performedfromeithersideofthelter-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 “Lbracket to the  
“Z” bracket.  
4.Rotate the “Lbracket 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  
LBRACKET  
REMOVE 4 SCREWS FROM  
FILTER RACK FRAME  
REMOVE 4 SCREWS SECURING  
“Z” BRACKET AND “LBRACKET  
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).  
• Internallymountedcircuitbreakersareavailableaseld  
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  
theooronaninsidewall.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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