Nortek B6BX Series User manual

Please read all information in this manual thoroughly and become familiar with the capabilities
anduseofyourappliancebeforeattemptingtooperateormaintainthisunit.Theseinstructions
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
ofequipment.Improperinstallation,service,adjustment,ormaintenancemaycauseexplosion,
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.Keep this manual where you have easy access to it in the future.If a
problemoccurs,checktheinstructionsandfollowrecommendationsgiven.Ifthesesuggestions
don’t eliminate your problem, call your servicing contractor.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
B6BX SERIES AIR HANDLER
INSTALLATION INSTRUCTIONS

2
TABLE OF CONTENTS
Important Safety Information ....................................3
Requirements & Codes..............................................3
General Information ...................................................4
BeforeYou Install this Unit.........................................4
Locating the Air Handler............................................4
Minimum Clearances.................................................4
Operation of Air Handler During Construction...........4
Installation in a Garage .............................................5
Plenums & Air Ducts .................................................5
Unconditioned Spaces...........................................5
Air Filters................................................................5
Acoustical Duct Work.............................................5
Air Handler Installation..............................................6
Packaging Removal...................................................6
Mounting Applications...............................................6
Upflow Installations ...................................................6
Downflow Installations...............................................6
Horizontal Installations..............................................6
Horizontal Left Installations....................................7
Horizontal Right Installations .................................7
Refrigerant Line Connections....................................8
Orifice removal & Installation.................................8
Connecting the Linsets ..........................................9
Condensate Drainage ............................................10
Electrical Connections.............................................11
Pre-Electrical Checklist ...........................................11
Line Voltage.............................................................11
Grounding................................................................11
Thermostat Connections.........................................11
Control Board..........................................................12
Twinning...............................................................12
Heater Kits...............................................................12
Electronic Air Cleaner..............................................12
Humidifier................................................................12
Startup & Adjustments ............................................13
BeforeYou Start the Unit.........................................13
Refrigerant Charging...............................................14
Air Circulation..........................................................14
Running the Blower Continuously........................14
Selecting Continuous Low Spd Fan Operation ....14
Turning the Blower Off..........................................14
System Cooling....................................................14
System Heating....................................................14
Blower Configurations.............................................14
3-Speed Units......................................................14
5-Speed Units......................................................14
Unit Maintenance......................................................15
Troubleshooting........................................................15
Figures &Tables .......................................................16
Figure 12. B6BX Physical Dimensions.................16
Figure 13. B6BX Components .............................17
Airflow Data.............................................................18
Table 3. B6BX Blower Performance Data.............18
Electrical Data & Diagrams .....................................19
Table 4. B6BX MCA & MOP Data ........................19
Table 5. Control Board Operation.........................20
Table 6. Control Board Settings............................20
Figure 14.W.D. with PSC Motor...........................21
Figure 15.W.D. with ECM Motor ..........................22
Installation / Performance Checklist.......................24

3
IMPORTANT SAFETY INFORMATION
INSTALLER:Pleasereadallinstructionsbeforeservicing
this equipment. Pay attention to all safety warnings and
any other special notes highlighted in the manual.Safety
markings are used frequently throughout this manual to
designateadegreeorlevelofseriousnessandshouldnot
be ignored.WARNING indicates a potentially hazardous
situationthatifnotavoided, couldresultinpersonalinjury
or death. CAUTION indicates a potentially hazardous
situationthatifnotavoided,mayresultinminorormoderate
injury or property damage.
WARNING:
B6 Series Air Handlers leave the factory with
a nitrogen holding 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.
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard 1 Slight Hazard
1
0
0
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Beforeservicing,disconnectallelectricalpower
to air handler.
• Whenservicingcontrols,labelallwiresprior
to disconnecting. Reconnect wires correctly.
• Verifyproperoperationafterservicing.
REQUIREMENTS & CODES
WARNING:
This unit must be installed in accordance with
instructions outlined in this manual 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.
• 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 for
special installation requirements.
• Thisequipmentcontainsnitrogen gas.Installationor
servicingshould only be performed by qualified trained
personnel thoroughly familiar with this type equipment.
• Allelectricalwiringmustbecompletedinaccordance
withlocal,stateandinternationalcodesandregulations.
• Installationofequipmentmayrequirebrazingoperations.
Installer must comply with safety codes and wear
appropriate safety equipment (safety glasses, work
gloves,fireextinguisher,etc.) when performing brazing
operations.
• Installthisunitonlyinalocationandpositionasspeci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 18) and the rating plate for proper
circulating airflow data.
• 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.
• This air handler may be used for temporary heating
of buildings or structures under construction. See the
guidelines listed on page 4.
• Airhandlerinstallationsinaresidentialgaragemustbe
installed as specified on page 5.

4
GENERAL INFORMATION
Thisappliancehasbeentestedforcapacityandefficiency
in accordance with AHRI 210/240 Standards and will
provide many years of safe and dependable comfort,
providing it is properly installed and maintained. Abuse,
improperuse,and/or improper maintenance can shorten
thelifeoftheapplianceandcreateunsafehazards.Please
read all instructions before installing the unit.
BeforeYou Install this Unit
√This equipment is securely packaged at the time of
shipmentanduponarrivalshouldbecarefullyinspected
for damage prior to installing the equipment at the job
site.Claimsfordamage(apparentorconcealed)should
be filed immediately with the carrier.
√The cooling load of the area to be conditioned must be
calculatedandasystemofthepropercapacityselected.
It is recommended that the area to be conditioned be
completely insulated and vapor sealed.
√Checktheelectricalsupplyand verifythe powersupply
isadequateforunitoperation.Thesystemmustbewired
and provided with circuit protection in accordance with
localbuildingcodes.Ifthereisanyquestionconcerning
the power supply, contact the local power company.
√Verify the duct system is appropriate for the air handler
being installed. Please note that when replacing an
existing system with lower air-flow, the duct system
may require modification.
Locating the Air Handler
• Surveythejobsitetodeterminethebestlocationfor
mounting the unit. Consideration should be given to
availabilityofelectricpower,serviceaccess,andnoise.
• Thedimensionsof the room oralcove mustbeable
to accommodate the overall size of the unit and the
installation clearances listed in Figure 1. Physical
dimensionsforthisairhandler arealsoshowninFigure
12 (page 16).
• Theairhandlershouldbesetintopositionbeforerouting
the refrigerant tubing.
Figure 1. Minimum Unit Clearances
REAR
0 cm / in.
RIGHT SIDE
0 cm / in.
LEFT SIDE
0 cm / in.
FRONT
† See Note
†NOTE:
Alcove Installations - Allow 61 cm (24 in.) minimum clearance
from front of unit to nearest wall or partition for servicing.
Recommended clearance is 91 cm (36 in.).
Minimum Clearances
• This appliance must be installed in accordance with
clearances listed in Figure 1.The air handler must be
installedwithampleclearanceforeasyaccesstotheair
filter, blower assembly, heater assembly and controls.
Applicable building codes may require additional
clearance to equipment. Refer to applicable building
codes for details.
• Staticpressure dropthrough louvered openings and
through return air plenums should be considered in
the overall duct design in the determination of the total
external static pressure.
Operation of Air Handler During Construction
CAUTION:
Failuretofollowtheseinstructionswillvoidthe
factory warranty and may significantly reduce
the life or the performance of the air handler,
and/or result in other unsafe conditions. It is
the responsibility of the installing contractor
to insure these provisions are met.
Operating an air handler in a construction environment
can cause the appliance a variety of problems. Proper
use of commercial portable space heating equipment
during construction is recommended. This air handler
may be used during construction if it is not in violation of
any applicable codes and the following criteria are met:
• The installation must meet all applicable codes and
be permanently installed according to the instructions
supplied with the air handler including electrical supply
and duct work.
• The air handler must be controlled by a properly
installed thermostat that complies with the current
provisions of national and local electrical codes.
Thermostat connections must be made in accordance
with instructions supplied with the air handler and
thermostat. See page 11.
• Theinstallationmustincludeaproperlyinstalledlterin
thereturn air system with no by-passair.Thefilter must
be inspected frequently and replaced when necessary.
• Returnairmustbesuppliedunrestrictedandlocated
such that dust and gases from construction activity are
not introduced into the circulating air system.
• Before occupying the structure: The lter must be
replaced or cleaned, the duct work must be inspected
and cleaned of any construction debris, and the air
handler must be cleaned and/or repaired if found to
be dirty, damaged, or malfunctioning in any way by
a qualified HVAC technician. The air handler shall be
inspected and approved by applicable local authority
even if this requires redundant inspections.
• The serial number for the air handler used during
construction must be submitted in writing (fax and
email also acceptable).This information will be used to

5
track the long-term affects of air handler usage during
construction.Proofofthissubmittalshallbeavailablefor
thefinalinspectionoftheairhandlerpriortooccupancy.
Installation in a Garage
WARNING:
Donotplacecombustiblematerialsonoragainst
the cabinet. Do not place flammable materials,
(gasoline, paint thinners, etc.) or any other
flammable vapors and liquids, in the vicinity
of the air handler.
TheB6Seriesairhandlermaybeinstalledinaresidential
garage with the provision that the unit must be located or
protected to prevent physical damage by vehicles.
• Seal all connections and joints with industrial grade
sealingtapeorliquidsealant.Requirementsforsealing
ductwork vary from region to region. Consult with local
codes for specific requirements.
Unconditioned Spaces
All duct work passing through unconditioned space must
beproperlyinsulatedtominimizeductlossesandprevent
condensation.Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.
Air Filters
B6 Series Air Handlers are not supplied with an air filter
whenshippedfromthefactory.Theinstaller must provide
ahighvelocityfilterthatisappropriatelysizedtothereturn
air duct opening or filter rack located in the bottom of the
unit. Accessing the filter does not require tools and can
beremovedfromthefrontoftheunitbyremovingthefilter
door.See Unit Maintenance (page 15) for filter sizes and
installation information.
WARNING:
Never operate the air handler without a filter
or with doors removed. Dust and lint can build
up on internal components,resulting in loss of
efficiency,equipmentdamage,andpossiblefire.
Acoustical Duct Work
• Certaininstallationsmayrequiretheuseofacoustical
lininginsidethesupply duct work.Acousticalinsulation
mustbe inaccordancewithall national andlocalcodes
forduct liners.Ductlining mustbe ULclassifiedbatts 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 all
nationalandlocalcodes.Fibrousductworkandinternal
acoustical lining must be NFPA Class 1 air ducts when
tested per UL Standard 181 for Class 1 ducts.
• Dampingducts,exiblevibrationisolators,orpleated
media-style filters on the return air inlet of the air
handler may be used to reduce the transmission of
equipment noise eminating from the air handler.These
treatmentscanproduceaquieterinstallation,particularly
in the heated space. However, they can increase the
pressure drop in the duct system. Care must be taken
to maintain the proper maximum pressure rise across
the air handler, temperature rise and flow rate. This
maymean increasing the duct sizeand/orreducingthe
blower speed.These treatments must be constructed
and installed in accordance with all national and local
codes.Forbestsoundperformance,besuretoinstallall
theneededgasketsandgrommetsaroundpenetrations
into the air handler, such as for electrical wiring.
Plenums & Air Ducts
WARNING:
All return ducts must be secured to the air
handler using appropriate methods. All return
ducts must be adequately sealed.When return
air is provided through the bottom of the unit,
the joint between the air handler and the return
air plenum must be air tight.
Returnairand circulatingairducts mustnotbe
connected to any other heat producing device
such as a fireplace insert, stove, etc.This may
result in fire, explosion, carbon monoxide
poisoning,personalinjury,orpropertydamage.
• Supplyandreturnairmustbedeliveredtotheairhandler
by duct(s) secured to the air handler casing, running
full size and without interruption.
• Thisunitisdesignedonlyforusewithareturnandsupply
duct.The return air duct must have the same free area
as the opening provided on the air handler.The ducts
should be appropriately sized to the capacity of the air
handlertoensureitsproperairflowrating.Table3(page
18)contains the maximumairflowdatalisted by model.
• Use transition ttings if the supply and/or return air
openings of the unit do not match the duct openings.
Thesetransitionsshouldbedimensionedinaccordance
with standard practice as specified in the ASHRAE
recommendations for duct transitions.
• Flexible connectors may be used between the unit
and the ductwork to prevent transmission of vibration
from the unit to the structure. If electric heater kits are
installed, heat resistant material must be used for the
flexible connector at the supply air end of the unit.

6
AIR HANDLER INSTALLATION
The B6 Series Air Handler is shipped ready for vertical
upflow installation and is approved for attic, basement,
alcove/closet or crawlspace installation with zero
clearance to combustibles. See Figure 1 (page 4) for
required installation clearances.This appliance is only
for indoor use.
• Theunitmustbeleveledatinstallationandattachedto
a properly installed duct system.
• Thesurfacethattheairhandlerismountedonmust
provide sound physical support of the unit.
• Theairhandlermustbeinstalledsothatallelectrical
components are protected from water.
• Ifalouvereddoorisinstalledacrossthefrontofthis
unit, the appliance must be mounted flush or behind
front edge of finished wall.
Packaging Removal
Remove the shipping crate and User’s Manual from the
equipment.When removing the crate, use extra care so
tubing connections are not damaged. Do not pull on the
coils upper tubes.
Mounting Applications
Vertical only air handlers are factory ready for upflow
applications. These units may be applied in downflow
dischargeapplicationswhenappliedwiththeappropriate
field kit.
Factory ready horizontal air handlers may be applied in
upfloworhorizontal-leftand-rightdischargeapplications.
These units may also be applied in downflow discharge
when applied with the appropriate field kit as specified in
the units Technical Specifications.
Through-the-floor installations require a 1/4” thick
noncombustible resilient gaskettobe used whenever the
supplyorreturnairductspassthroughthefloor.Thegasket
should be positioned between the duct, unit, and floor.
Upflow Installations
All air handlers are factory shipped, ready for upflow
installation. The horizontal drain pan may be removed
from the air handler when installing the unit in an upflow
configuration.All return air must enter from the bottom of
the unit. A typical upflow unit is shown in Figure 2.
Downflow Installations
Thedownflowaccessorykit(SeeTechnicalSpecifications)
is required for downflow applications. Instructions for
installingthedownflowaccessorykitareincludedwiththe
kit.Itisrecommendedthattheaccessorybeinstalledprior
toinstallingtheunit.Allreturnairindownflowapplications
mustenterthroughthetopoftheunit.Atypicalinstallation
of the unit in a downflow application is shown in Figure 3.
Horizontal Installations
The B6 Series air handler can be installed horizontally in
an attic, basement, crawl space or alcove. It can also be
suspended from a ceiling in a basement or utility room in
eitherarighttoleftairfloworlefttorightairflowasshownin
Figure4(page7).Airhandlersmayormaynotbeshipped
from the factory with all the parts required for horizontal
left applications and horizontal right applications. If your
unit does not have parts for a horizontal application, a kit
may be available.
NOTE: In all horizontal applications in which the unit is
installed above a finished ceiling and/or living space, a
secondarydrainpanmustbeinstalledundertheentireunit
to avoid damage to the ceiling in the event of condensate
Figure 2. Upflow Installation
Horizontal
Drain Pan
Return
Air
Figure 3. Downflow Installation
Tube
Close-off
Plate
Coil
Cabinet
Adaptor Kit

7
Figure 5. Unit Horizontally Suspended
Threaded
Rod
Lag
Bolt
Nuts (x2)
Washer
and
Lockwasher
Nuts (x2)
overflow.Additionally,itisrecommendedthatanapproved
water level indicator or float switch device be used to
shut down the unit in the event water is detected in the
auxiliary drain pan.
If suspending the air handler from the ceiling, assemble
asupport frame (Figure 5) using slottediron channel and
full threaded rod. Fasten the frame together with nuts,
washers, and lockwashers. Secure the support frame
to the rafters with lag bolts.The air handler can also be
suspended using steel straps around each end of the
unit.Thestraps should be attachedtotheairhandlerwith
sheet metal screws and to the rafters with bolts.
Horizontal Left Installations:
1.Remove the coil access door.
2.Remove the plug from one of the threaded holes in the
horizontal drain pan. Completely remove the webbing
located in the threaded holes of the horizontal drain
pan. IMPORTANT: If the webbing is not removed, the
condensate will not drain properly and ceiling damage
may occur.
3.Insertthe plug(fromhorizontaldrainpan) intotheopen
and unused drain hole in the drain pan at the bottom
of the unit to block bypass air.
4.Remove the corresponding drain line knockout from
the coil access door to allow access to the horizontal
drain.
5.Replace the door and attach the drain line.
Horizontal Right Installations:
1.Removethecoilaccessdoor.Unscrewtheline-settube
close-off plate from the front left cabinet rail.
2.Slide the coil and drain pan assembly out of the unit.
3.Remove the sheet metal hairpin covers (if supplied)
from the back of the coil and discard.
4.Place the horizontal drain pan on the opposite side of
the coil.On units with 2 sets of knockouts, remove the
other set of knockouts in the coil spacing plates and
insert support rod.
5.Slide the coil and the horizontal drain pan assembly
back into the unit.Re-attach the tube close off plate.
6.Remove the plug from one of the threaded holes
in the horizontal drain pan. Completely remove the
webbing located in the threaded holes of the drain
pan. IMPORTANT: If the webbing is not removed, the
condensate will not drain properly and ceiling damage
may occur.
NOTE: It is recommended that the suction line be
insulated up to the coil inside of the cabinet.
7.Insertthe plug(fromhorizontaldrainpan) intotheopen
and unused drain hole in the drain pan at the bottom
of the unit to block bypass air.
8.Remove the corresponding drain line knockout from
the coil access door to allow access to the horizontal
drain.
9.Replace the door and attach the drain line.
Figure 4. Horizontal Configurations
HORIZONTAL RIGHT
HORIZONTAL LEFT
RETURN
AIR
RETURN
AIR

8
Refrigerant Line Connections
WARNING:
Thecoilintheairhandlerisfactoryshippedwith
a nitrogen charge. Avoid direct face exposure
or contact with valve when gas is escaping.
Always ensure adequate ventilation is present
during the depressurization process.Address
any uncertainties before proceeding. Failure
to comply with this warning could result in
equipment damage, personal injury, or death.
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard 1 Slight Hazard
1
0
0
• Theinstaller shouldmakeevery effortto ensurethe
field installed refrigerant containing components of the
system have been installed in accordance with these
instructions andsoundinstallation practicesforreliable
system operation and longevity.
• Theairhandlercoildoesnotcontainarefrigerantcharge.
Refer to the installation instructions supplied with the
outdoor unit for refrigerant charge information.
• 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 specifications. See Figure 12 (page
16) for liquid and suction line locations.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be flowing through the
jointsduringbrazing.Thiswillpreventinternaloxidation
and scaling from occurring.
• Refrigeranttubingshouldberoutedinamannerthat
minimizesthelengthoftubingandthenumberofbends
in the tubing. It should be supported in a manner that
prevents it from vibrating or abrading during system
operation.Tubingshouldbekeptcleanofforeigndebris
during installation.
• Ifpreciseformingofrefrigerantlinesisrequired,acopper
tubingbenderisrecommended.Avoidsharpbendsand
contact of the refrigerant lines with metal surfaces.
• Refrigerant lines should be wrapped with pressure
sensitive neoprene or other suitable material where
they pass against sharp sheet metal edges.
• B6BX series air handlers are charged through service
valves on the end of the liquid tube for each circuit.
These must be removed before brazing the line sets.
Orifice Removal & Installation
The orifice installed in the air handler has been sized for
use with the most popularly matched outdoor units.The
orifice size as shipped from the factory is listed on the air
handler rating plate. Perform steps 1 - 9 to confirm that
the orifice size meets the requirements outlined in the
outdoor unit installation manual.
1.Remove the cap from the end of the liquid line.
2.Verifypressurization bydepressingtheSchradervalve
ontheendoftheliquidline.Listenforanyescapinggas.
If there is no pressure, test the coil for leakage.
• Ifleakageisfound,clearlymarkthelocationoftheleak
and return the coil to the distributor for processing.
• Ifnoleaksarefound,thecoilmaybeinstalled.
3.Depress the valve to relieve all pressure from the coil.
4.Remove and discard the valve core.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenchesbeusedwhenlooseningortightening
nuts. Do not over tighten!
5.Usingtwowrenches,loosenthenutanddistributorbody
as shown in Figure 6.Turn the assembly nut counter-
clock-wise until the orifice body halves are seperated.
6.Insert a light-gauge wire hook between the distributor
body and the restrictor orifice while being careful not
to scratch either part. Carefully remove the restrictor
orifice from the distributor body.See Figure 7 (page 9).
7.Check the actual size of the new orifice. NOTE: The
size is stamped on its side. Do not use pin gauges to
measure the orifice diameter.
8.Insert the new orifice into the distributor body, rounded
end down.See Figure 8 (page 9).
Figure 6. Loosening of Nut & Distributor Body

9
Connecting the Linesets
IMPORTANT NOTES FOR HORIZONTAL OR
DOWNFLOWINSTALLATIONSWITHTXVVALVE:
• The sensing bulb must be located flush against the
suction line for optimum heat transfer.
• Avoidattachingthesensingbulbtothelowestpartof
thesuctionlinewherecondensatemayaccumulate.
• Do not locate the sensing bulb on vertical sections
of the lineset.
• For horizontal lines,the bulb should not be located
at 12 or 6 o’clock position of the suction line.The
best location is at 4 or 8 o’clock.
• For additional information on proper sensing bulb
locations, please refer to the valve manufacturer’s
instructions.
IMPORTANT:ThestepsintheOrificeRemoval&Installation
section (page 8) must be performed before the linesets
are connected.
1.Remove grommets from line set holes.
CAUTION:
It is recommended that a wet rag be wrapped
around the suction line in front of the close
off plate or the sensing bulb (if TXV is
installed) before applying heat. Failure to keep
components cool during brazing may result
in structural damage, premature equipment
failure, or possible personal injury.
2.Remove the rubber plug from the suction line.
3.Cut the Schroeder housing from the end of the liquid
line.Verifythe endisround,cleanand freeofanyburrs.
4.Route and cut both lineset tubes to proper length in
accordance with the outdoor unit specifications.Verify
the ends are round, clean, and free of any burrs.
5.Positiongrommetonlinesetwithsufficientdistanceaway
frombrazingarea.Brazingprocessescanpermanently
damage grommets.
6.Connect the suction and liquid lineset tubes.
CAUTION:
It is recommended that a wet rag be wrapped
around the suction line in front of the close
off plate or the sensing bulb (if TXV is
installed) before applying heat. Failure to keep
components cool during brazing may result
in structural damage, premature equipment
failure, or possible personal injury.
7.Braze the individual connections with dry nitrogen
flowing through the joints. NOTE: This will prevent
internal oxidation and scaling from occurring.
Figure 8. Restrictor Insertion into Distributor Body
Figure 7. Removal of Orifice
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenchesbeusedwhenlooseningortightening
nuts. Do not over tighten!
9.Realign the assembly nut on the distributor body and
hand tighten both components. Mark a line on both
bodiesandthentightenanadditional1/4turnusingtwo
wrenches.Themovementofthetwolineswillshowhow
much the nut is tightened. If a torque wrench is used,
tighten to 14-16 Nm (10-12 ft. lbs.).

10
• Iftheairhandlerislocatedinorabovealivingspace
where damage may result from condensate overflow,
an auxiliary drain pan shall be installed under the unit.
A separate drain line should extend from the pan to a
conspicuous point and serve as an alarm indicating
that the primary drain is restricted.As an alternative to
a separate drain line, an approved water level indicator
or float switch device may be used to shut down the
unit in the event water is detected in the auxiliary pan.
• Installasingle12.7cm(5inch)trapinthecondensate
drainlineasclosetothecoilaspossible.Makesurethat
the top of the trap is below the bottom of the drain pan
to prevent the condensate from overflowing the drain
pan. NOTE: There must be only one trap in the drain
line.Using more than one trap may prevent drainage.
• Primethetrapwithwater.Insulatethedrainifitislocated
inanunconditionedspace,andtestthecondensateline
for leaks.Consult local codes for additional restrictions
or precautions.
• During system checkout, inspect the drain line and
connections to verify proper condensate drainage.
8.Wrap the refrigerant lines with pressure sensitive
neoprene or other suitable material especially where
the lines enter the opening in the sheet metal.
9.Evacuatethesystemofmoistureandnon-condensables
to prevent low efficiency operation or damage to the
unit. The suggested range of evacuation is 350 - 500
microns.
10.Charge the system with refrigerant. Refer to the
outdoorunitinstallationmanualforadditionalcharging
instructions.
11.Check the system for leaks, including the lineset and
the brazed joints.
12.Replace all grommets and properly dispose of all
removed parts.
Condensate Drainage
CAUTION:
The air handler must be level to ensure proper
condensate drainage. An unlevel installation
may result in structural damage, premature
equipment failure, or possible personal injury.
• Methodsfordisposingofcondensatevaryaccording
to local codes.Refer to local codes or authority having
jurisidiction for restrictions and proper condensate
disposal requirements.
• The drain pan that is supplied with this air handler
contains a primary and secondary drain fitting. The
condensate is drained from the unit through two 1.9
cm (3/4”) female pipe fittings located on the front side
of the unit as shown in Figure 9.
• Thedrainpanmustbedrainedwitheldsuppliedtubing
or pvc pipe and adequately trapped. Both drain tubes
must have a minimum diameter of 1.9 cm (3/4”) and be
trapped separately.
IMPORTANT: Failure to install a trap may result in
condensation overflowing the drain pan, resulting in
substantial water damage to surrounding area.
• Routebothlinestoasuitabledrain,avoidingsharpbends
and pinching of the lines.The drain should maintain a
minimum horizontal slope in the direction of discharge
of not less than 2.5 cm (1”) vertical for every 3.048 M
(10 ft) of horizontal run.
1.9 cm (3/4 in.) Adapter
w/ 1.9 cm (3/4 in.) dia. hose barb
1.9 cm (3/4 in.) minimum
dia. PVC or flexible tubing
HORIZONTAL
UPFLOW
DOWNFLOW
NOTES:
1.The drain lines must maintain a downward slope to ensure proper
condensate drainage.
2. Each condensate drain must be trapped separately using a J-Trap or
field supplied loop.
Figure 9. Condensate Drainage Example

11
ELECTRICAL CONNECTIONS
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Beforeservicing,disconnectallelectricalpower
to the air handler.
• Whenservicingcontrols,labelallwiresprior
to disconnecting. Reconnect wires correctly.
• Verifyproperoperationafterservicing.
Pre-Electrical Checklist
√Verify the voltage, frequency, and phase of the supply
sourcematchthespecificationsontheunitratingplate.
√Verifythat the serviceprovidedbytheutilityissufficient
tohandletheadditionalloadimposedbythisequipment.
See the unit wiring label orTable 4 (page 19) for proper
high and low voltage wiring.
√Verifyfactorywiringisinaccordancewiththeunitwiring
diagram(Figures14&15,pages21&22).Makesurethe
connectionsdidn’tloosenduringshippingorinstallation.
LineVoltage
• Electricalconnectionsmustbeincompliancewithall
applicable local codes and ordinances.
• Anelectricaldisconnectmustbelocatedwithinsight
ofandreadilyaccessibletotheunit.Thisswitchshall
becapableofelectricallyde-energizingtheoutdoorunit.
Seeunit data labelforproperincoming field wiring.Any
other wiring methods must be acceptable to authority
having jurisdiction.
• 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.
• Overcurrentprotectionmustbeprovidedatthebranch
circuitdistributionpanel and sizedas shownonthe unit
ratinglabelandaccordingtoapplicablelocalcodes.See
the unit rating plate andTable 4 (page 19) for minimum
circuit ampacity and maximum overcurrent protection
limits.
• The installer should become familiar with the wiring
diagram/schematic before making any electrical
connections to the unit. See the unit wiring label or
Figures 14 & 15 (pages 21 & 22).
• Useonlycopperwireforthelinevoltagepowersupply
to this unit.Use proper code agency listed conduit and
a conduit connector for connecting the supply wires to
the unit.Aluminum supply wire may be used if a heater
kit is installed.
• Ifreplacinganyoftheoriginalwiressuppliedwiththe
unit,thereplacementwiremustbecopperwireconsisting
of the same gauge and temperature rating.
• Providepowersupplyfortheunitinaccordancewiththe
unit wiring diagram, and the unit rating plate. Use UL
listedconduitandconduitconnectorsforconnectingthe
supply wires to the unit and for proper grounding.Field
supplied bushings for the power supply cables must be
added to support and protect the power supply cables.
• All208/230Voltunitsareshippedfromthefactorywired
for 240 volt operation.For 208V operation, remove the
lead from the transformer terminal marked 240V and
connect it to the terminal marked 208V.
Grounding
WARNING:
The unit cabinet must have an uninterrupted
or unbroken electrical ground to minimize
personalinjuryifanelectricalfaultshouldoccur.
Do not use gas piping as an electrical ground!
This unit must be electrically grounded in accordance
with local codes. Use the grounding lug provided in the
control box for grounding the unit.
Thermostat Connections
• Thermostatconnectionsshall bein accordance with
the instructions supplied with the thermostat. The
thermostat used with this equipment must operate in
conjunction with any installed accessories.Typical AC
and air handler hookups are shown in Figure 11 (page
13).
CAUTION:
Isolation must be maintained from the external
Class 2 output of any transformer in a cooling
circuit.Useathermostatwithisolatingcontacts
to prevent inter-connection of Class 2 outputs.
• Wherelocalcodesrequirethatthethermostatwiring
must be routed through a conduit or raceway, splices
can be made inside the unit; however, all wiring must
be NEC Class 1 and must be separated from incoming
power leads.
• Thethermostatshouldbemountedabout1.5Meters(5
feet) above the floor on an inside wall. DO NOT install
the thermostat on an outside wall or any other location
whereitsoperationmaybeadverselyaffectedbyradiant
heat from fireplaces, sunlight, or lighting fixtures, and
convective heat from warm air registers or electrical
appliances. Refer to the thermostat manufacturer’s
instruction sheet for detailed mounting and installation
information.
• Installthegrommet,whichispackedwiththeunit,in
the hole for low-voltage wires. Properly connect the

12
low-voltage wiring between the thermostat, outdoor
unit, and control board. NOTE: When the low voltage
wires are positioned in this grommet, the grommet will
preventchafingand/orshortingofthelowvoltageleads.
Control Board
The control board in the air handler controls the timing
sequenceoftheelements.Theboardisequippedwitha3
secondbloweron delayand a 15 second bloweroffdelay
in heating and a 40 second blower off delay in cooling.
See Figures 14 or 15 (pages 21-22) and Table 5 (pages
20) for control board operation.
Twinning
B6BXairhandlersarenotsupplied withabuiltintwinning
capability. To connect two air handlers to a common
singlestageACcondensingunitorheatpump,atwinning
kit is available for field installation. Please follow the
instructions supplied with the kit.
NOTE: Variable speed air handlers cannot be twinned.
Heater Kits
When electric heat packages with circuit breakers are
field-installed, the circuit breaker may be used as a
disconnecting means in most applications. Reference
the NEC and local codes for disconnect requirements.
If a heater kit is installed:
The B6BX air handler is shipped from the factory without
an electric heater kit installed. If Electric heat is desired,
the H6HK heater kit may be purchased separately and
fieldinstalled.Determinethecorrectsizeheaterkitforyour
unit by referring to the list below or the units rating label.
A Cabinet.......................................................15Kw max
B Cabinet.......................................................20Kw max
C Cabinet.......................................................30Kw max
1.Connect the 2 wire plugof the air handler to themating
2 wire plug of the heater kit.
2.Connect the line voltage leads to the circuit breaker or
terminal block provided.
3.Connect the heater kit plug with the mating receptacle
on the air handler control board.
If a heater kit is not installed:
1.Remove the 2 wire plug of the air handler by cutting
the wires and discarding the plug.
2.Strip the ends of the 2 air handler wires and connect
to the line-voltage leads with the 2 wire nuts provided.
Electronic Air Cleaner (EAC)
The unit has an output to power an electronic air cleaner
when the blower is running. This output is rated to 1.0
amp at 208/240V.
Humidifier
The unit has an output to power a humidifier when the
blower is running. This output is rated to 1.0 amp at
208/240V.
LED 1
L 1
L 2
P2
RC G WY
3A Fuse
HEATER P1
5 4 3 21 1 2345
LED 1
BLWDTC
BLWDTC_R
HEAT
COOL
EAC
L 1
L 2
P2
RCGWY
3A Fuse
HEATER P1
CONTROL BOARD
FOR A & B CABINET CONTROL BOARD FOR C CABINET
Figure 10. B6BX Control Boards

13
Figure 11.TypicalThermostat Connections
GR
W
Thermostat
Y
C
Air
Handler
Air
Conditioner
Y
Typical Air Conditioner with
Standard Air Handler
GRCE
OY
Thermostat
Typical Heat Pump with
Standard Air Handler
Heat Pump
NOTE: Jumper between
W2 & E is required when
no OD T-Stat is used.
W1
Y
G
R
C
Air
Handler
W1
Y
G
R
C
R
C
Y
W2
O
W2
STARTUP & ADJUSTMENTS
WARNING:
Theevaporatorcoilis shipped fromthefactory
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.
BeforeYou Start the Unit
Prior to start-up, complete the following inspections:
√Verifytheunitislevelandproperlylocatedwithadequate
clearances for servicing the unit. See Figure 1 (pg 4).
√Check condensate drain line(s) for proper drainage.
√Verify the surrounding area and top of the unit is free
from obstructions and debris.
√Check all duct connections. Make sure the duct work
is adequately sealed to prevent air leakage.
√Check all coil connections for leaks.
√Verify that the line voltage power leads are securely
connectedandtheunitisproperlygrounded.Makesure
alldoorsareinstalled beforerestoringpowertotheunit
√Verify the thermostat is wired correctly. Make sure all
low voltage wires are securely connected.
√Verify the power supply branch circuit overcurrent
protection is sized properly.
√Verify filter is properly and securely installed.
IMPORTANT: Before starting the unit, install the initial
charge on units that are factory shipped with a nitrogen
holding charge:
1.Read all installation instructions first.
2.Purge the nitrogen holding charge.
3.Evacuate the unit to 350 - 500 microns.
4.Allow the unit to remain under vacuum for at least 30
minutes.
5.Weigh in the proper amount of new (or reclaimed)
refrigerant. Refer to the air conditioner or heat pump
installation manual for the proper type and quantity of
refrigerant.
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard 1 Slight Hazard
1
0
0

14
Blower Configurations
3-Speed Units
The blower speed is preset at the factory for operation
at the same speed for heating and cooling, by using the
jumping terminal on the blower motor and connecting it
to the desired speed with both the red and black wires
connected to the jumping terminal. NOTE: The control
board is programmed with a 40 second off delay in the
cooling mode for optimum system performance and
efficiency.
CAUTION:
To avoid personal injury or property damage,
make sure the motor leads do not come into
contactwithanyuninsulatedmetalcomponents
of the unit.
For optimum system performance and comfort, it may be
necessary to change the factory set speed. See Table 3
(page 18) for airflow data.To change the blower speed:
1.Disconnect all electrical power to the unit and remove
the upper door.
2.Remove the black and red wires from the blower motor
jumping terminal. Discard the blower motor jumping
terminal.
3.Connect the heating speed wire (red) and the cooling
speedwire(black) tothedesiredblowerspeed marked
on the terminal block of the blower motor.
• Terminal4=Hispeed
• Terminal5=Medspeed
• Terminal6=Lowspeed
4.Replace the upper door and secure it to the unit.
5.Restore power to the unit.
5-Speed Units
Blower speed can be selected by setting the switches on
the control board. See Table 6 (page 20).
Refrigerant Charging
The system refrigerant charge can be checked and
adjusted through the service ports provided at the front
paneloftheoutdoorunit.Useonlygaugelineswhichhave
aSchraderdepressiondevicepresenttoactuatethevalve.
Air Circulation
Running the Blower Continuously
Set the thermostat’s system mode to OFF and the
thermostat’s fan mode to ON. The blower motor should
run continuously.Check for air delivery at the register(s).
Ensure that there are no obstructions at the registers or
in the ducts.
Selecting continuous low speed fan operation
(Standard Blower)
The air handler is equipped with an option of continuous
low speed fan operation.When Gis energized without Y/
Y2, the air handler will operate using the cooling speed.
With G& Y/Y2 or Y/Y2 energized, the air handler will
operate in the selected cooling speed (including 40 sec
blower-off delay).
Turning the Blower Off
Set thermostat’s fan mode to AUTO, the blower will shut
down immediately.
System Cooling
1. Set the thermostat’s system mode to COOL and fan
mode to AUTO. Lower the thermostat’s temperature
mode below room temperature and observe that the
blower energizes. Check the air being discharged at
the register is cooler than room temperature. Verify
unit refrigerant pressures are in order. Blower should
be turning in direction indicated by arrow. NOTE: DO
NOT alter unit wiring. Listen for any unusual noises.
Locate the source and correct as needed.
2. Allow the unit to run for several minutes and then set
thethermostat’stemperatureaboveroomtemperature.
Verify the blower cycles off with the thermostat.
System Heating
1.Setthethermostat’ssystemmode toHEAT andthefan
mode to AUTO.Increase the thermostat’s temperature
above room temperature and observe that the blower
energizes.Checktheairbeingdischargedattheregister
is warmer than room temperature.
2. Allow the unit to run for several minutes and then set
thethermostat’stemperaturebelowroomtemperature.
Verify the blower cycles off with the thermostat.

15
TROUBLESHOOTING
If the air handler fails to operate, check the following:
• Istheelectricturnedon?
• Isthethermostatoperatingproperly?
• Aretheblowercompartmentdoor(s)inplace?
• Istheairhandlerdisconnectclosed?
• Hasthecircuitbreakertrippedorthecontrolboardfuse
burnedopen?
• Areanymanualresetswitchesopen?
• Isthelterdirtyorplugged?
• IstheLEDontheairhandlercontrolboardconstantly
ON?Ifnot,refertoTable2todeterminefaultcondition.
RED LED (AN2) DIAGNOSTIC
OFF Control Fault (No Power)
Flash Blower Fault
ON Normal Operation
Table 2. Air handler Control Board Fault Conditions
CABINET SIZE FILTER SIZE
A30.5 cm x 50.8 cm x 2.5 cm
(12 in. x 20 in. x 1 in.)
B45.7 cm x 50.8 cm x 2.5 cm
18 x 20 x 1
C50.8 cm x 50.8 cm x 2.5 cm
20 x 20 x 1
Table 1. Filter Sizes
UNIT MAINTENANCE
Propermaintenanceismostimportanttoachievethebest
performancefroma airhandler.Someofthecomponents
and their locations are shown in Figure 12 (page 17). If
any component of the air handler must be replaced, use
onlyfactoryauthorizedreplacementpartsspecifiedinthe
Replacement Parts List provided online.
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
•Beforeservicing,disconnectallelectricalpower
to air handler.
•Whenservicingcontrols,labelallwiresprior
to disconnecting. Reconnect wires correctly.
•Verifyproperoperationafterservicing.
• Thesemaintenanceinstructionsareprimarilyintended
toassistqualifiedtechniciansexperiencedintheproper
maintenance and operation of this appliance.
• Always reinstall the doors on the air handler after
servicingorcleaning/changingthefilters.Donotoperate
the air handler without all doors and covers in place.
• Verifythatthethermostatisproperlyinstalledandis
notbeing affectedbydraftsor heat from lamps orother
appliances.
• To achieve the best performance and minimize
equipment failure, it is recommended that a yearly
maintenance checkup be performed. At a minimum,
this check should include the following items:
Air Filter(s)
B6 Series Air Handlers are not supplied with an air filter
when shipped from the factory. It is recommended that
the filter be cleaned or replaced monthly. Newly built or
recently renovated homes may require more frequent
changinguntilthe constructiondusthasminimized.Filter
sizesshowninTable1areavailableatmostlocalretailers.
WARNING:
Never operate the air handler without a filter in
place. Dust and lint in the return air can build
upon internalcomponents,resulting in loss of
efficiency,equipmentdamage,andpossiblefire.
Filters designed to remove smaller particles such as
pollen, may require additional maintenance.
Blower Compartment
Dirt and lint can create excessive loads on the motor
resulting in higher than normal operating temperatures
and shortened service life. It is recommended that the
blower compartment be cleaned of dirt or lint that may
have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Blower FanWheel
Inspect the blower wheel blades for accumulations of dirt
andcleanifnecessary.Inspectmountingnutfortightness
when done.
Blower Motor & Assembly
Inspect the blower assembly and motor mounting
bracketsfortightnessandcorrosion.Correctdeficiencies
if necessary.The blower motor contains sealed bearings
and under normal operating conditions, no maintenance
is necessary for the life of the equipment.

16
FIGURES &TABLES
Figure 12. B6BX Physical Dimensions
CABINET SIZE H W A DETAIL D
A 110 (43 5/16) 36 (14 3/16) 32.4 (12 3/4) No
B 110 (43 5/16) 50 (19 11/16) 46.4 (18 1/4) No
Tall B 126 (49 5/16) 50 (19 11/16) 46.4 (18 1/4) No
C 142 (55 15/16) 57 (22 7/16) 53.3 (21) Yes
NOTE: All Dimensions shown as cm (inches).
2.9 (1 1/8)
Knockout (typ.)
1.9 (3/4)
33
(13)
4.8 (1 7/8)
Knockout
3.2 (1 1/4)
4.1 (1 5/8)
4.8 (1 7/8) 3.2 (1 1/4)
8.3 (3 1/4)
6.7 (2 5/8) 2.9 (1 1/8)
Knockout (typ.)
4.4 mm (1 3/4)
Knockout (typ.)
4.8 (1 7/8)
9.2 (3 5/8)
14.3 (5 5/8)
DETAIL
“D”
8.3 (3 1/4)
5.7 (2 1/4)
38.7
(15 1/4) 33
(13)
SUCTION
LIQUID
“W”
2.9 (1 1/8)
4.8 (1 7/8) 2.4 (7/8) K.O.
“H”
55.9
(22)
“A”
1.9 (3/4)
1.9 (3/4)

17
Horizontal
Drain PanVertical
Drain Pan
Coil
Assembly
Motor
Mount Kit
Blower
Motor
Transformer
Capacitor
Circuit
Breaker (60A) Heating Element
Assembly
Filter
Tracks
Blower
Wheel
Blower
Housing
Motor Control
Board
Control
Board
Filter
Door
Upper Door
Assembly
Lo
wer Door
Assembly
Figure 13. B6BX Components

18
AIRFLOW DATA
Table 3. B6BX Blower Performance Data
018E-A
Dry Coil
ESP .25 (0.1) .5 (0.2) .76 (0.3) 1.0 (0.4) 1.3 (0.5) 1.5 (0.6) 1.8 (0.7) 2.0 (0.8)
LOW 296 (627) 270 (572) 234 (496) N/A N/A N/A N/A N/A
MED 348 (737) 321 (680) 293 (620) 247 (523) 215 (456) N/A N/A N/A
HIGH 434 (920) 403 (853) 365 (774) 328 (694) 261 (554) 228 (484) N/A N/A
024/030E-B
Dry Coil
ESP .25 (0.1) .5 (0.2) .76 (0.3) 1.0 (0.4) 1.3 (0.5) 1.5 (0.6) 1.8 (0.7) 2.0 (0.8)
LOW 531 (1125) 509 (1079) 480 (1018) 447 (948) 406 (860) 352 (745) 287 (609) 203 (430)
MED 610 (1293) 580 (1228) 546 (1157) 506 (1072) 463 (980) 406 (861) 336 (712) 248 (526)
HIGH 692 (1466) 655 (1387) 615 (1304) 570 (1207) 521 (1103) 465 (985) 390 (827) 303 (641)
036/042E-B
Dry Coil
ESP .25 (0.1) .5 (0.2) .76 (0.3) 1.0 (0.4) 1.3 (0.5) 1.5 (0.6) 1.8 (0.7) 2.0 (0.8)
LOW 695 (1473) 662 (1403) 626 (1327) 585 (1240) 541 (1146) 496 (1051) 434 (919) 346 (733)
MED 726 (1539) 691 (1463) 655 (1387) 611 (1295) 565 (1196) 517 (1095) 458 (970) 372 (789)
HIGH 755 (1599) 721 (1528) 680 (1441) 639 (1353) 590 (1249) 536 (1136) 480 (1018) 392 (830)
048/060E-C
Dry Coil
ESP .25 (0.1) .5 (0.2) .76 (0.3) 1.0 (0.4) 1.3 (0.5) 1.5 (0.6) 1.8 (0.7) 2.0 (0.8)
M1 712 (1509) 737 (1562) 757 (1603) 782 (1657) 803 (1702) 826 (1749) 846 (1793) 865 (1832)
M2 785 (1663) 807 (1709) 826 (1750) 850 (1801) 872 (1848) 890 (1885) 913 (1934) 932 (1974)
M3 894 (1894) 910 (1928) 923 (1956) 940 (1992) 963 (2041) 983 (2082) 1003 (2126) 1025 (2172)
M4 973 (2062) 986 (2088) 999 (2117) 1016 (2153) 1032 (2187) 1045 (2214) 1062 (2251) 1078 (2284)
M5 996 (2110) 1011 (2143) 1022 (2165) 1036 (2194) 1052 (2229) 1068 (2262) 1085 (2299) 1100 (2331)
NOTES:
1) Airflow is shown in liter’s per second (cfm) +/- 5%.
2) External static pressure is shown in cm (inches) W.C.
3) All airflows are measured with filter and with dry coil. For wet coil, subtract .1” external static pressure.
4) See unit nameplate or installation instructions for maximum recommended external static pressure.

19
Table 4. B6BX Minimum Circuit Ampacity & Maximum Overcurrent Protection
ELECTRICAL DATA & DIAGRAMS
Aux. Heat
Installed
(Nom. KW)
220VAC50Hz,SinglePhase 240VAC50Hz,SinglePhase
Single
Circuit Multiple Circuit Single Circuit Multiple Circuit
Circuit A Circuit B Circuit C Circuit A Circuit B Circuit C
MCA MOP MCA MOP MCA MOP MCA MOP MCA MOP MCA MOP MCA MOP MCA MOP
-018E-A
None 1.6 15 1.6 15 - - - - 1.6 15 1.6 15 - - - -
5 24.5 25 24.5 25 - - - - 26.6 30 26.6 30 - - - -
8 37.9 40 37.9 40 - - - - 41.2 45 41.2 45 - - - -
10 47.4 50 47.4 50 - - - - 51.6 60 51.6 60 - - - -
15 70.3 80 47.4 50 22.92 25 76.6 80 51.6 60 25 25 - -
20 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
25 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
30 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
-024/030E-B
None 2.6 15 2.6 15 - - - - 2.6 15 2.6 15 - - - -
5 25.5 30 25.5 30 - - - - 27.6 30 27.6 30 - - - -
8 38.9 40 38.9 40 - - - - 42.2 45 42.2 45 - - - -
10 49.5 50 49.5 50 - - - - 52.6 60 52.6 60 - - - -
15 71.4 80 49.5 50 22.92 25 - - 77.6 80 52.6 60 25 25 - -
20 94.3 100 49.5 50 36.67 50 - - 102.6 110 52.6 60 50 50 - -
25 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
30 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
-036/042E-B
None 3.6 15 3.6 15 - - - - 3.6 15 3.6 15 - - - -
5 26.5 30 26.5 30 - - - - 28.6 30 28.6 30 - - - -
8 39.9 40 39.9 40 - - - - 43.2 45 43.2 45 - - - -
10 49.5 50 49.5 50 - - - - 53.6 60 53.6 60 - - - -
15 72.4 80 49.5 50 22.92 25 - - 78.6 80 53.6 60 25 25 - -
20 95.3 100 49.5 50 36.67 50 - - 103.6 110 53.6 60 50 50 - -
25 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
30 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
-048/060E-C
None 8.3 15 8.3 15 - - - - 7.7 15 7.7 15 - - - -
5 31.3 30 31.3 30 - - - - 32.7 30 32.7 30 - - - -
8 44.6 45 44.6 45 - - - - 47.3 50 47.3 50 - - - -
10 54.2 60 54.2 60 - - - - 57.7 60 57.7 60 - - - -
15 77.1 80 54.2 60 22.92 25 - - 82.7 90 57.7 60 25 25 - -
20 100.0 110 54.2 60 36.67 50 - - 107.7 110 57.7 60 50 50 - -
25 106.7 125 54.2 60 36.67 50 22.92 25 132.7 150 57.7 60 50 50 25 25
30 145.8 150 54.2 60 36.67 50 36.67 50 157.7 175 57.7 60 50 50 50 50

20
Table 6. Control Board Settings
Table 5. Control Board Operation
Control Signal
& MODE Operation Total KW Board Action
W
(EHEAT)
ON
5 KW Stage 1 Heat on instantly
Heat blower on after 3 second delay
10 KW Stage 1 Heat on instantly Heat blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
OFF Heat stages off instantly
Blower off after 15 second delay
W &Y
(AUX HEAT)
ON
5 KW Stage 1 Heat on instantly
Cool blower on after 3 second delay
10 KW Stage 1 Heat on instantly Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
OFF Heat stages off instantly
Heat blower turns off after 40 second delay
G
(FAN) ON Cool blower on after 3 second delay
OFF Cool blower off instantly
Y
(H.P. & COOL) ON Cool Blower on after 3 second delay
OFF Cool Blower off after 40 second delay
SET HEAT COOL
5432112345
M1 OFF OFF OFF OFF ON ON OFF OFF OFF OFF
M2 OFF OFF OFF ON OFF OFF ON OFF OFF OFF
M3 OFF OFF ON OFF OFF OFF OFF ON OFF OFF
M4 OFF ON OFF OFF OFF OFF OFF OFF ON OFF
M5 ON OFF OFF OFF OFF OFF OFF OFF OFF ON