Nordyne B3BV Series User manual

B3BV Series Electric Furnaces
ForHUDapprovedinstallationsinmanufacturedhomesandmodularhomes
Installation Instructions
These instructions are intended to assist qualified individuals experienced in the proper
installation of heating and/or air conditioning appliances. Some local codes require
licensed installation/service personnel for this type equipment. All installations must be
in accordance with these instructions and with all applicable national and local codes
and standards. Improper installation, service, adjustment, or maintenance can cause,
fire, electrical shock or other conditions which may result in personal injury or property
damage. Unless otherwise noted in the instructions, only factory authorized kits or
accessories may be used when modifying this product.
INTRODUCTION
The B3BV Series electric furnaces are approved for use in HUD code manufactured
homes (HUD Manufactured Home Construction and Safety Standard (Title 24, Part
3280)) and other modular home applications.
The B3BV Series electric furnace may be installed in downflow or upflow applications
as “freestanding” units, and in closet or alcove installations.
B3BVSeries electricfurnaces aresupplied withfactory installedelectric heat.Approved
NORDYNE heat-pump/air conditioning coils may be installed in the field.

2
GENERAL INFORMATION
Codes
Allelectricalpowerwiringfor theB3series
electricfurnacemust beinstalledin accor-
dance with:
1) HUD Manufactured Home Construc-
tion and Safety Standard
2) NFPA 70 - National Electric Code
(NEC)
NOTE : Circuit breakers installed in the
B3 electric furnace are for short-circuit
protection of the internal wiring and to
serveasaunitdisconnect. Circuitbreak-
ers installed in the B3BV electric furnace
DO NOT provide over-current protection
of the supply wiring. Over-current protec-
tion of the supply wiring must be provided
atthedistributionpanelandsizedasshown
intheinstallationinstructionsorontheunit
data label, and per the NEC.
Location
Reference the installation instruction in-
cluded with this unit for location require-
ments.
Clearance
All electric heater kits less than 20 kw are
approved for use in air handler installa-
tions with zero-clearance to combustibles
at any blower speed. For horizontal and
upflow configuration, air handlers
equipped with 20 kw electric heater kits
are approved for installation with zero
clearance to combustibles at any blower
speed. When using a 20 kw electric heat
kit in a downflow installation, the blower
mustbesetforhighspeedforbothheating
and cooling.
VENTILATION
TheB3BVelectricfurnacehasacut-outon
each side for ventilation air. Use
NORDYNE part number 914120 or
914427 adaptor with Ventilaire III or IV to
supply the proper amount of ventilation
air. The VentilAire connections must be
made for the system to conform to H.U.D.
rules. Do not leave disconnected after
servicing or adding A/C to the system.
RETURN AIR
In closet or alcove installations provide at
least 235 square inches free opening for
return air for B-cabinet (19 3/4" wide)
models and 300 square inches for C-
cabinet (22 1/2" wide) models.
The return air opening can be located in a
closet door or a sidewall. If the return air
opening is directly adjacent to the side (or
front)of theair handler,6" minimumclear-
ance must be provided between the side
of the furnace and the return air opening.
Ifnopartofthereturnairopeningisdirectly
adjacent to the unit no clearance is re-
quired.
If an upflow pedestal mounting stand is
fabricatedinthefielditmustbeconstructed
strong enough to support the unit with all
accessories installed (approximately 130
lbs. for B-cabinet models and 200 lbs. for
C-cabinet models). The construction of
the pedestal stand must also allow for at
least235square inchesfreeopening(300
squareinchesforC-cabinetmodels)inthe
application. Field fabricated upflow ped-
estalmountingstandsmustbeconstructed
of noncombustible materials.
Refertotheinstallationinstructionincluded
with this unit for other return air details.
SUPPLY AIR DUCTS
Theductsystemmustbe designedsothat
the external static pressure of the system
does not exceed the maximum external
static pressure indicated on the unit data
label.
Downflow applications require the use of
a plenum connector shown in Figure 1 or
its equivalent if the supply air ducts pass
through the floor of the structure. See
Table 1 for plenum connectors available.

3
The plenum connectors are designed for
use with trunk ducts having a minimum
width of 12 in. If sufficient space is not
available to adequately bend and secure
plenumtabs itmaybe necessarytoattach
the connector to the duct using sheet-
metalfastenersandsealwithanapproved
foil tape.
Plenum connectors may be field con-
structed but must meet requirements as
stated in the unit installation instructions.
Table 1. Optional Accessory Kits
Figure 1. Plenum Adapter
13.25"
18.5" (B-Cab.)
21.25" (C-Cab.)
INSTALLATION
Install the unit as directed in the Installa-
tionInstructions. NOTE: Securetheunitto
the structure using metal strap and/or fas-
teners at the top of the unit and at the
bottom of the unit.
POWER WIRING
!WARNING:
To avoid risk of electric
shock, personal injury, or
death, disconnect electrical
power to the unit before
performing any maintenance
or service. The unit may have
more than one electric power
supply.
All wiring must comply with the current
revision of the National Electric Code and
mustbesized fortheminimum ampacities
as listed on the unit data label or in Table
2.
If a single circuit adaptor kit is used, it may
need to be re-configured for some appli-
BC
913840 914969
913841 914970
913842 914971
913872 913873
917343A 917344A
Cabinet Size
Description
Downflow Plenum
Connector, 6.25"
Downflow Plenum
Connector, 8.25"
Downflow Plenum
Connector, 10.25"
Upflow Pedestal
Mounting Stand
Downflow Coil
Adaptor

4
B3BV
Minimum Circuit Maximum Over-Current
Ampacity Protection
Circuit Circuit Single Circuit Circuit Single
Model # Voltage KW
ABCircuitABCircuit
15 KW 240 14.4
55.0 25.0 80.0 60.0
30.0 90.0
20 KW 240 19.2
55.0 50.0 105.0 60.0 50.0 125.0
Table 2. Electrical Data
cations. Removethesinglecircuitadaptor
kitcoverandverifythatthelugsareconfig-
ured correctly for the application. If the
lugsare notconfiguredfor theapplication,
refer to the instructions included with the
kitandmodifytheconfiguration. Installthe
singlecircuitadaptorkit(ifused)intheline
side (“on” end) of the circuit breakers.
Tighten the lugs securely (45 in-lbs rec-
ommended).
Connect the supply wiring to the circuit
breakers, single circuit adaptor kit, or ter-
minal block. Tighten the lugs securely.
Whenusing dualsupplycircuits verifythat
thesupplysizedforcircuit“A”isconnected
to the circuit breaker that is connected to
the top element assembly.
Replace metal circuit breaker line cover.
Refer to Figure 2 for thermostat wiring
examples.
A/C or H/P COIL INSTALLATION
Approved air conditioning and heat pump
system components are listed on the unit
nameplate.
To install the indoor coil:
1. Remove door cover plate, door and
coil close-off plate (with insulation).
Discard door cover plate.
2. For upflow applications slide the coil
into the track located in the bottom of
the unit.
3. For downflow applications the down-
flow adaptor (see Table 1) must be
used. Install the downflow adaptor
and coil as directed in the instructions
included with the kit.
4. Reinstall the door and coil close-off
plate (with insulation). NOTE: In
downflow applications the door is ro-
tated 180° so that the refrigerant and
condensate lines remain on the left
side.
5. Install the refrigerant and condensate
lines as directed in the instructions
included with the outdoor unit.
MOTOR SPEED SELECTION
The blower speed is preset at the factory
for operation at the same speed for heat-
ing and cooling. For optimum system per-
formance and comfort, it may be neces-
sary to change the factory set speed. To
change the blower speed, disconnect all
electricalpowertotheunitandremovethe
upper door. Connect the black wire from
the motor to the desired blower speed
markedontheterminalblockoftheblower
motor.Terminal 4= HighSpeed,Terminal
5 = Med Speed and Terminal 6 - Low
Speed.
Replace the upper door and secure it to
the unit. Restore power to the unit.
High speed operation is required when
using a 20 kw electric heater kit in a
downflow application.

5
Figure 2. Typical Air Conditioning and Heat Pump System Connections
GRW
Thermostat
Green
Red
Brown
G
R
W2
Orange
Grey
YC
B3BV Electric
Furnace A/C OD Section
Y
Typical Air Conditioning System
Connection
C
W1NOTE: Connect"W"
leadstogetherwhen
stagedheaterkitsare
usedwithoutoutdoor
thermostats
GRW
2CEOY
Thermostat
Green
Red
Brown
G
R
W2
Orange
Grey
OY
R
C
B3BV Electric
Furnace Heat Pump OD
Section
Typical Heat Pump System Connection
W2
C
W1
NOTE: Jumper
betweenW2 andE is
requiredwhenno OD
T-Statisused.
GRW
2CEOY
Thermostat
Green
Red
Brown
G
R
W2
Orange
Grey
OY
R
C
B3BV Electric
Furnace Heat Pump OD
Section
Typical Heat Pump System Connection
with Optional Outdoor Thermostat
W2
C
W1
EOD
Stat
R
Thermostat
Red
Brown
Orange
B3BV Electric
Furnace
Typical Heating Only System
Connection
W

6
TRANSFORMER
R C G
W1
46
1 3
52
24V
LOW
VOLTAGE
RED
GRAY
GREEN
3 SPD. MOTOR
BLACK
6
5
4 3 2 1
GRAY
RED
FUSE
*
BROWN
BROWN
ORANGE
GRAY
RED
BLACK
WHITE
*Note: Fuse may not be present on some models.
W2
1 = COM 2 = CAP 3 = CAP 4 = HIGH 5 = MED 6 = LOW
BLACK
BLOWER RELAY
BLOWER
MOTOR
PLUG
6 5 4
3 2 1
GROUND
YELLOW
WHITE
ORANGE
BLUE
BLACK
BROWN
RED
BLACK BLACK
GRAY
RED
RED
GRAY
1 2 3 4 5 6 7 8 9
CONTACTOR
CONTACTOR
LIMIT
ELEMENTS ELEMENTS
CIRCUIT
BREAKERS
HEATER KIT PLUG
SUPPLY VOLTAGE
RED
BLACK
BLACK
BLACK
BLACK
BLACK
LIMIT
GRAY
1 = COM 2 = CAP 3 = CAP 4 = HIGH 5 = MED 6 = LOW
N.C N.O
Com
Figure 3. Typical System Wiring Diagram (20 kw, 2 Stage Shown)
Air Handler with Factory Installed Heat (20 kw)
NOTES: 1. The blower motor speed tap connection may not be
as shown. See the Installation Instructions.
2. Disconnect all power before servicing. 3. Transformer may have a dual voltage primary tap.
Match the tap position with the supply voltage used.
4. If the internal wiring is replaced, use only 105°C
copper wire of the same gauge.
5. Aluminum or copper supply conductors are suitable.
FIELD WIRING
FACTORY WIRING
LOW VOLTAGE HIGH VOLTAGE
710283

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1
2
3
Heater Kit Replacement Parts List
ITEM PART B3BV
NO. NO. DESCRIPTION 015K-B 020K-B
1 270012 Element Assembly - 4.8 kw 1
270006 Element Assembly - 9.6 kw 1 2
2 621908 Contactor, 1-pole 1
621909 Contactor, 2-pole 1 2
3 626518 Limit, 1-pole,160° F 2 2
4 632249 CircuitBreaker,2-pole,60 amp (not shown) 2 2

O’Fallon,MO
7081950(Replaces7081020)
Specifications and illustrations subject to change
without notice and without incurring obligations.
PrintedinU.S.A.(10/02)
¢708195C¤
708195
INSTALLER: PLEASE LEAVE
THESE INSTALLATION INSTRUCTIONS
WITH THE HOMEOWNER