INSTALLATION
INSTRUCTIONS
E2006 Lennox Industries Inc.
Dallas, Texas, USA
CBWMV Series Units
AIR HANDLERS
505,047M
09/06
Supersedes 02/06
Litho U.S.A.
Table of Contents
Shipping & Packing List . . . . . . . . . . . . . . . . . . . . . . . .
CBWMV Unit Dimensions . . . . . . . . . . . . . . . . . . . . . .
CBWMV Unit Parts Arrangement . . . . . . . . . . . . . . . .
CBWMV Unit Parts Description . . . . . . . . . . . . . . . . . .
CBWMV Unit Optional Accessories . . . . . . . . . . . . . .
Installation − Setting Equipment . . . . . . . . . . . . . . . . . .
Return Air Opening Guidelines . . . . . . . . . . . . . . . . . .
Filter Assembly & Filters . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting:
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Due to higher operating pressures, CBWMV units
must not be applied to steam boiler systems.
CAUTION
Unit is designed to be used with non−potable boiler
systems only.
Shipping & Packing List
CAUTION
1 − CBWMV Air Handler [NOTE − Includes freezestat
mounted to the manifold.]
Physical contact with metal edges and corners
while applying excessive force or rapid motion can
result in personal injury. Be aware of, and use
caution when working near these areas during
installation or while servicing this equipment.
1 − Bag assembly containing:
1 − Electrical make−up box
1 − Copper fitting
1 − Snap bushing
Introduction
2 − Water line grommets
3 − Wire nuts
The multi−positional Dave Lennox Signaturet Collection
CBWMV air handler/hot water coil unit is designed to be
used with non-potable boiler systems for warm air heating.
A variety of Lennox air conditioning systems may be ap-
plied to the CBWMV unit for optional cooling.
2−7/8" cabinet plugs
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
09/06
505,047M
Page 1
*2P0906*
*P505047M*
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General
CBWMV Unit Parts Description
Blower
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation. Only qualified ser-
vice technicians or installers may install and service this
unit.
The CBWMV is equipped with a variable speed motor that
provides separate cooling and heating CFM selections
and low continuous fan speeds.
Hot Water Coil
The copper tube coil is equipped with aluminum fins which
provide excellent heat transfer. Manual air bleed ports are
located in the copper tubing to release trapped air in the
water circuit in all unit configurations.
CBWMV Unit Parts Arrangement
CBWMV Unit
HOT WATER
COPPER
TUBE COIL
INSULATED
STEEL
CABINET
Blower Control
The control provides a fixed blower delay of 45 seconds
ON / 30 seconds OFF on a W call.
Thermostat and accessory connections are made to the
terminal strips in the control box.
CBWMV Unit Optional Accessories
Accessory Circulators (53J76, 99K69)
An accessory circulator should be used in long line ap-
plications. Two circulators are available with either 9 gal-
lons per minute (99K69) or 14 gpm (53J76) flow rate. Both
units have 7/8" soldering joints (inlet and outlet) . See pip-
ing section for more information.
Downflow Base (68M03)
A downflow base kit is available for downflow applications
without add−on cooling coils. The base provides clearance
for routing the CBWMV unit’s inlet and outlet water lines.
NOTE − Downflow applications with an add−on cooling coil
require field−fabricated transitions to provide adequate
clearance for servicing/removing the cooling coil without
cutting the water lines.
SUPPLY AIR
BLOWER
CBWMV
CONTROL BOX
Figure 1
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Requirements
Application
The CBWMV unit is designed for use in non−potable water
boiler systems. The water heating device must be ade-
quate to provide enough heat according to the Engineering
Handbook specifications. The water heating device must
provide a minimum of 6 gallons/minute for small units
(CBWMV−040, −070) and 9 gallons/minute for large units
(CBWMV−090, −100, −120).
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.
Installation and service must be performed by a
qualified installer or service agency.
Installation − Setting Equipment
Installation of Lennox CBWMV unit must conform with lo-
cal building codes. Refer to the electrical section (Page 8)
for US and Canadian electrical regulations.
WARNING
This product contains fiberglass wool.
When paired with a water heating device, refer to local
building codes for special considerations. Refer to water
heating device for agency and service clearances. Clear-
ances to combustibles for the CBWMV unit only is zero
clearances.
Disturbing the insulation during installation, main-
tenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass wool is known to the State of California to
cause cancer.)
Table 1
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
CBWMV Unit Service Clearances
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Clearances
Location
Inches (mm)
Recommended
Service Access
Front Access
Panel
30 (762)
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
NOTE − Service access clearance must be maintained.
Accessibility and service clearances must take prece-
dence over fire protection clearances.
For installation in a residential garage, unit must be lo-
cated or protected to avoid physical damage by vehicles.
The boiler installation must conform to the requirements of
the authority having jurisdiction or, in the absence of such
requirements, to the latest revision of the National Fuel
Gas Code, ANSI Z223. (Available from the American Gas
Association, 8501 E. Pleasant Valley Road, Cleveland,
OH 44134). Reference should also be made to local gas
utility regulations and other codes in effect in the same
area in which the installation is to be made. When installed
in Canada: The latest revision of the CAN1/CSA−B149.1
and/or B149.2 Installation Codes for Gas-Burning Equip-
ment and/or local codes.
The CBWMV unit must be installed so that its electrical
components are protected from water.
When the CBWMV unit is used with an air conditioner, the
air handler shall be installed on the upstream side of the
cooling evaporator coil to avoid freeze−up of water system
and condensation. With a parallel flow arrangement, a
damper (or other means to control the flow of air) must ad-
equately prevent chilled air from entering the air handler. If
the damper is manually operated, it must be equipped to
prevent operation of either the heating or the cooling unit,
unless it is in the full HEAT or COOL setting.
Determine the CBWMV unit installation location and posi-
tion units so that door panels are accessible. Keep in mind
routing of the water and plumbing lines and electrical con-
nections.
NOTE −CBWMV series units must not be used in or for the
following applications:
The CBWMV unit is multi−positional. No adjustment is nec-
essary to apply unit for upflow or horizontal discharge. A
downflow base is available and provides clearance for
routing the inlet/outlet water lines when the CBWMV unit is
applied without an add−on cooling coil. Downflow applica-
S
S
S
S
construction heater − during any phase of construction
unit heater
mobile home heater
potable water applications
Page 4
505047 09/06
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tions with add−on cooling coils require field−fabricated tran-
sitions that provide at least 6 inches of clearance for the
CBWMV unit’s inlet/outlet water lines. See figure 2 for ex-
amples.
Either suspend the unit from the roof rafters or floor joists
or mount on a platform. The CBWMV unit must be level
and well supported.
NOTE − 1/2 hp and 1 hp blower motors are equipped with
three flexible legs and one rigid leg. The rigid leg is
equipped with a shipping bolt and a flat white plastic wash-
er (rather than the rubber mounting grommet used with a
flexible mounting leg). The bolt and washer must be re-
moved before the air handler is placed into operation.
After the bolt and washer have been removed, the rigid leg
will not touch the blower housing.
CBWMV Multi−Positional Unit
AIR
FLOW
RIGHT HAND DISCHARGE*
AIR
FLOW
AIR
Duct System
FLOW
Use industry-approved standards (such as those pub-
lished by Air Conditioning Contractors of America or Amer-
ican Society of Heating, Refrigerating and Air Conditioning
Engineers) to size and install the supply and return air duct
system. This will result in a quiet and low-static system that
has uniform air distribution.
UPFLOW
DOWNFLOW BASE
AIR
FLOW
LEFT HAND DISCHARGE*
DOWNFLOW
NOTE − Do not operate the air handler with an external
static pressure that exceeds 0.8 inches w.c. Higher exter-
nal static pressures may cause erratic operation.
* CBWMV units must not be installed horizontally on the front or
back of the unit.
Return Air Plenum
Figure 2
Units may be horizontally installed in either attic or crawl
space.
IMPORTANT
Return air must not be drawn from a room where any
fossil fuel appliance (ie., a water heater) is installed.
CAUTION
CBWMV series units are shipped with an antifreeze
thermostat to prevent the water coil from freezing.
The freezestat is installed at the factory but must be
this feature when you install or run the unit.
When return air is drawn from a room, a negative pres-
sure is created in the room. If a fossil fuel appliance is op-
erating in a room with negative pressure, the flue prod-
ucts can be pulled back down the vent pipe and into the
room. This reverse flow of the flue gas may result in in-
complete combustion and the formation of carbon mon-
oxide gas. This toxic gas might then be distributed
throughout the house by the air handler duct system.
CAUTION
Use a drain pan for installations over finished living
areas.
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Side Return Air With Transition And Filter
Return Air Opening Guidelines
NOTE − Do not bring in air from the back of the unit. Return
air can be brought in from the sides or bottom only.
20" X 25" X 1"
(508MM X 635MM X 25MM)
CLEANABLE FILTER
Bottom Return
If the air handler is installed on a platform with bottom re-
turn, make an airtight seal between the bottom of the air
handler and the platform to ensure that the air handler op-
erates properly and safely. Use aluminum tape or mastic
between the plenum and the air handler cabinet to ensure
a tight seal. The air handler is equipped with a removable
bottom panel to facilitate installation.
RETURN AIR
PLENUM
TRANSITION
Figure 3
Side Return
For side return air applications, cut the air handler cabinet
at the maximum return air dimensions shown on page 2.
sition and filter.
Return Air Base
For return air with the optional return air base (RAB), see
figure 4 (and refer to installation instructions provided with
Return Air Base kit).
NOTE − Single side inlet applications result in approxi-
mately a 4 percent reduction of CFM on B−size units and
approximately a 5 percent reduction of CFM on C−size
units:
*NOTE − Both unit and return air base openings must be
connected to and entirely covered by a single plenum or
IAQ accessory opening. Optional side return air filter kits
cannot be used with RAB Return Air Base.
Optional Return Air Base and Unit Dimensions − Inches (mm)
4
(102)
*23 (584) Overall (Max.)
NOTE − IN SIDE RETURN
APPLICATIONS, THE RAB
IS REQUIRED FOR 100%
CFM CAPACITY.
*Minimum
11 (279)
*Height varies
with plenum or
IAQ accessory
height.
*Maximum
14 (356)
*Unit
Opening
Side Return
Air Openings
(Either Side)
AIR FLOW
7−1/4
(184)
5−5/8
(143)
*Base
Opening
RETURN
AIR BASE
23 (584)
27−5/8 (702)
17 (432) RAB−B (98M60)
21 (533) RAB−C (98M58)
3/4
(19)
7/8 (22)
FRONT VIEW
SIDE VIEW
Figure 4
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Removing the Bottom Panel (bottom return or return
air base configurations)ꢀRemove the two screws that
secure the bottom cap to the air handler. Pivot the bottom
cap down to release the bottom panel. Once the bottom
panel has been removed, reinstall the bottom cap. See fig-
through the bottom panel and the bottom flange of the
cabinet.
2. Install one bolt and two nuts into each hole. Screw the
first nut onto a bolt and then insert the bolt into a hole.
A flat washer may be added between the nut and the
bottom of the unit.
3. Screw another nut onto the bolt on the inside of the air
handler base. A flat washer may be added between
the nut and the bottom of the unit.
Removing the Bottom Panel
4. Adjust the outside nut to the appropriate height and
tighten the inside nut to secure the arrangement.
Horizontal Applications
The CBWMV air handler can be installed in horizontal ap-
plications. Refer to Engineering Handbook for additional in-
formation. Allow for clearances to combustible materials as
indicated on the unit nameplate.
This air handler may be installed in either an attic or a
crawlspace. Either suspend the air handler from roof raf-
supported at both ends and beneath the blower deck to
prevent sagging.
BOTTOM CAP
SCREW
BOTTOM PANEL
Unit Suspended in Attic or Crawlspace
Figure 5
Leveling an Upflow UnitꢀWhen the side return air inlets
are used in an upflow application, it may be necessary to
install leveling bolts on the bottom of the air handler. Use
field−supplied corrosion−resistant 5/16 inch machine bolts
1/4 IN.
RODS
DRAIN
PAN
NOTE − Maximum leveling bolt length is 1−1/2 inches.
ALLOW
SUFFICIENT
CLEARANCE
BETWEEN ROD
AND UNIT TO
REMOVE
Leveling Bolt Installation
3/8 (10)
inches (mm)
1−3/4 (44)
AIR HANDLER FRONT
3/8 (10)
ACCESS PANEL.
ANGLE IRON
U−CHANNELS
Figure 7
NOTE − Heavy−gauge, perforated sheet metal straps
(plumbers’ straps) may be used to suspend the unit from
roof rafters or ceiling joists. When suspending the unit in
this manner, support must be provided for both the ends
and themiddleof theairhandlertopreventsagging.Straps
must not interfere with plenum or water piping. Securing
screws shouldbe1/2inchfrom thetop edgeand 1−1/2inch
from thesideedgeinallcases.Coolingcoilsandsupply
and returnairplenumsmustbesupportedseparately.
1−3/4 (44)
LEVELING BOLT
LOCATIONS
AIR
HANDLER
BOTTOM
LEVELING BOLT
LOCATIONS
3/8 (10)
NOTE − When the air handler is installed on a platform in a
crawlspace, it must be elevated enough to avoid water
damage and to allow the optional evaporator coil to drain.
3/8 (10)
1−3/4 (44)
1−3/4 (44)
Horizontal and Downflow Applications
Return air can be brought in through the end of an air han-
dler installed in the horizontal or downflow application. The
air handler is equipped with a removable bottom panel to
facilitate installation (see figure 5).
Figure 6
1. Lay the air handler on its back and drill a 5/16 inch di-
ameter hole in each corner of the air handler’s bottom.
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shooting.
Filter Assembly & Filters
This unit is not equipped with a filter or rack. A field−pro-
vided high−velocity filter is required for the unit to operate
must be in place any time the unit is operating.
Line Voltage (120V)
Line voltage field supply conductors are terminated at the
CBWMV unit. The unit is shipped with the line voltage con-
nections secured to the lower left coil manifold for left side
make−up box installations. For right side make−up box
installations, remove the wire tie that holds the line voltage
connections and pull excess wires into blower deck/control
Table 2
Recommended Filter Sizes
Filter Size
Air Handler
Cabinet Size
Side Return
16 X 25 X 1 (1)
16 X 25 X 1 (1)
Bottom Return
16 X 25 X 1 (1)
20 X 25 X 1 (1)
Install make−up box (provided for line voltage wiring in the
17−1/2"
21"
Make−up Box Wiring
Plumbing
Pipe and Fitting Specifications
Refer to local building and plumbing codes for approved
copper pipe and fittings.
WIRES SHOWN AS SHIPPED,
ROUTED FOR LEFT SIDE
MAKE−UP BOX INSTALLATION
Plumbing Procedures
Refer to the installation instructions of the water heating
device to be used with the CBWMV unit. Follow the recom-
mendations outlined in that instruction as well as govern-
ing plumbing codes and practices.
FOR RIGHT SIDE MAKE−UP
BOX INSTALLATION ꢀ
REMOVE WIRE TIE,
PULL EXCESS WIRE INTO
BLOWER DECK / CONTROL
BOX AREA.
Plumbing Checklist
S
Flush water lines between the CBWMV unit and the
water heating device before start−up. Normal flushing
procedures should be used to rid the system of con-
taminants and foreign debris.
S
CBWMV units are installed in non-potable systems.
Electrical
Wiring and grounding must conform to the current National
Electric Code ANSI/NFPA No. 70, or Canadian Electric
Code Part I, CSA Standard C22.1, and local building
codes. Refer to following wiring diagrams. See unit name-
plate for minimum circuit ampacity and maximum overcur-
rent protection size.
Figure 8
Interior Make−Up Box Installation
MAKE−UP
BOX
Select the proper supply circuit conductors in accor-
dance with tables 310−16 and 310−17 in the National
Electric Code, ANSI/NFPA No. 70 or tables 1 through 4
in the Canadian Electric Code, Part I, CSA Standard
C22.1.
MAKE−UP
BOX
CAUTION
USE COPPER CONDUCTORS ONLY.
WARNING
Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.
LEFT SIDE
RIGHT SIDE
Figure 9
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National Electric Code (ANSI/NFPA No. 70) for the
USA and current Canadian Electric Code part 1 (CSA
standard C22.1) for Canada. A green ground wire is
provided in the field make−up box.
Electrostatic Discharge (ESD) - Precautions
And Procedures
CAUTION
5. Install the room thermostat according to the instruc-
wiring connections in varying applications. If the air
handler is being matched with a heat pump, refer to the
Electrostatic discharge can affect electronic com-
ponents. Takeprecautionsduringairhandlerinstal-
lation and service to protect the air handler’s elec-
tronic controls. Precautions will help to avoid con-
trol exposure to electrostatic discharge by putting
the air handler, the control and the technician at the
sameelectrostaticpotential.Neutralizeelectrostatic
charge by touching hand and all tools on an un-
painted unit surface, such as the blower deck, be-
fore performing any service procedure.
®
FuelMaster21 installation instruction.
Removeable Jumpers
Removeable Jumper DS to Y1ꢀThe factory−installed
wire jumper that connects terminals DS and Y1 on the TB1
terminal strip in the control box must be removed when the
air handler is installed in a system supporting dehumidifi-
t
cation using a SignatureStat thermostat (e.g., Humidi-
t
®
trol Enhanced Dehumidification Accessory or Harmony
zone controls).
Refer to table 3 for field wiring.
1. Refer to the CBWMV unit’s nameplate for minimum
circuit ampacity and maximum overcurrent protection
size.
Removeable Jumper R to OꢀThe factory−installed wire
jumper that connects TB7 (24V) terminal R to TB1 termi-
nal O must be removed when the air handler is installed in
applications which include a heat pump unit and the Fuel-
2. Install a separate disconnect switch (protected by ei-
ther fuse or circuit breaker) near the air handler so that
power can be turned off for servicing.
®
Master21 control board. If the jumper is left intact, termi-
nal O will remain energized, eliminating the heat mode in
the heat pump.
3. Complete the wiring connections to the equipment.
Use the provided unit wiring diagram and the field wir-
larger that is suitable for Class II rating for thermostat
connections.
Removeable Jumper Y1 to Y2ꢀThe factory−installed
wire jumper that connects Y1 and Y2 on the TB1 terminal
strip must be removed if two−stage cooling is used. If the
jumper is not removed the outdoor unit will only operate in
second−stage cooling.
4. Electrically ground the unit according to local codes or,
in the absence of local codes, according to the current
Table 3
Thermostat (Application)
TB1 Y1 to Y2
TB1 DS to Y1
TB1 R to O
Wiring Connections
SignatureStatt CBWMV
OUTDOOR
UNIT
1 Heat / 1 Cool with
SignatureStatt Thermostat
Yes
No
(Remove)
No
(Remove)
TERMINALS
[Single-Stage Heat Pump]
JUMPERS
REMOVED
CBWMV
SignatureStatt
TERMINALS
OUTDOOR
UNIT
2 Heat / 2 Cool with
No
(Remove)
No
(Remove)
No
(Remove)
SignatureStatt Thermostat
[Two-Stage Heat Pump (Refer
to FM21 Instructions)]
ALL JUMPERS
REMOVED
ꢁO" terminal used only with heat pumps.
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Indoor Blower Speeds
Accessory Field Wiring (TB66 & TB67)
1. When the thermostat is set to ꢁFAN ON," the indoor
blower will run continuously at approximately 38% of
the second−stage cooling speed when there is no cool-
ing or heating demand.
Connect wires from accessories (e.g. powered air clean-
ers, humidifiers) to terminal blocks TB66 and TB67 (see
2. When the CBWMV is in the heating mode, the indoor
blower will run on the heating speed designated by the
position of the HEAT pin.
3. When there is a cooling demand, the indoor blower will
run on the cooling speed designated by the position of
the COOL pin.
CBWMV Control Box
TERMINAL BLOCKS
TB2
(HOT)
TB13
(NEUTRAL)
TRANSFORMER
T1
Accessory Field Wiring (K212)
Connect field wiring to 3PDT relay K212 (Lennox part
CB8
CIRCUIT
BREAKER
DOOR
INTERLOCK
SWITCH
Accessory Relay Field Wiring (K212)
BDC3
WIRING
STRAIN
RELIEF
VARIABLE
SPEED
CONTROL
1
2
3
BUSHING
ACCESSORY
FIELD
4
5
6
TB66
WIRING
TERMINAL
BLOCKS
TB67
TERMINAL
BLOCK 24V
7
8
9
K212
RELAY
A
B
TERMINAL
BLOCK TB1
ACCESSORY RELAY
24V 125MA 1/4" QUICK CONNECT TERMINALS
RELAY CONTACTS RATING 8 AMPS @ 120V MAX. 24V COIL
Figure 11
Figure 10
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Continuous Low Blower Option
Freezestat Operation
Refer to the blower speed chart located on the CBWMV
unit wiring diagram for factory set cooling, heating and low
(continuous) blower speeds. Systems using a cooling ther-
mostat subbase may operate continuous blower (factory-
set to operate at 38% of second-stage cooling speed)
through the FAN−ON switch of the thermostat. For continu-
ous low blower with a system without a cooling subbase, a
fan switching subbase may be used.
IMPORTANT
Use of the freezestat feature is required in all instal-
lations using CBWMV units.
The CBWMV unit is equipped with a field-wired freezestat.
The freezestat protects the CBWMV system from freezing
temperatures when the unit is installed in unconditioned
areas.
Heating or cooling demand will cause blower to go to heat
or cool speed.
The factory-provided freezestat must energize the circula-
tor when water temperatures fall below 45ºF. Freezestat
Blower Speed Adjustments
Diagnostic LEDs
RUN LED ꢀ Indicates a demand for blower operation in
either the heating mode or continuous fan−only mode.
RUN LED will not illuminate during a cooling demand.
Freezestat Field Wiring
CFM LED ꢀ Indicates the CFM at which the unit is operat-
ing. The light flashes once for approximately every 100
CFM. For example, if the unit is operating at 1000 CFM,
CFM LED will flash 10 times. If the CFM is 1150, CFM LED
will flash 11 full times plus one fast or half flash.
At times the light may appear to flicker or glow. This takes
place when the control is communicating with the motor
between cycles. This is normal operation.
Figure 13
The appropriate speed according to application and CFM
need is selected by moving jumper pins.
BDC3 Variable Blower Control Board
BDC3 Variable Speed Control Board
CBWMV units are equipped with a variable speed motor
that is capable of maintaining a specified CFM throughout
the external static range. A particular CFM can be obtained
by positioning jumpers (COOL, HEAT, and ADJUST) on
the BDC3 control board. The COOL and HEAT jumpers
are labeled 1, 2, 3, and 4. Each of the numbers corre-
sponds with an air volume (CFM) setting. The ADJUST
jumper is labeled TEST, −, +, and NORM. The + and − pin
settings are used to add or subtract a percentage of the
CFM selected. The TEST jumper is used to operate the
motor in the test mode. The DELAY jumper controls ramp-
ing profiles.
JP1
15 PIN PLUG
(BOARD TO
MOTOR)
ACCESSORY
RELAY CON-
TACTS
(DRIVES OP-
TIONAL
ACCESSORY
RELAY)
OPERATIONAL
SELECTOR
PINS
(AFFECTS
BOTH
HEATING AND
COOLING
MODES)
through 9 to determine the correct air volume for heat and
cool speed taps.
Diagnostic LEDs located on the BDC3 control board are
provided to aid in identifying the unit’s mode of operation.
Certain scenarios will arise depending on the jumper posi-
tions. Read through the jumper settings sections before
HEATING SPEED COOLING SPEED
SELECTOR PINS
FAN DELAY
SELECTOR PINS SELECTOR PINS
DIAGNOSTIC
LEDS
Figure 14
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®
For applications with the Harmony Zoning System, the
Jumper Settings
blower CFM volume is determined by the Harmony control
center. The minimum blower speed is predetermined at
400 CFM for −CBWMV−24B−040 and 36B−070 series units
and 600 CFM for CBWMV−36C−090, 60C−100, and
60C−120 series units. This speed is not adjustable.
IMPORTANT
Before changing jumper setting, make sure the mo-
tor has completely stopped. Any jumper setting
change will not take place while the motor is run-
ning.
With the thermostat set for ꢁContinuous Fan" and without a
call for heating or cooling, the CBWMV will provide 38% of
the COOL CFM selected.
CBWMV series units. These settings are for nominal ton-
nage match−ups with the CBWMV. When matched with
other sizes, it is recommended that the CFM be adjusted
approximately to 400 CFM per ton.
HEAT Pins ꢀ The HEAT jumper is used to determine
CFM heating. These jumper selections are activated only
when W1 is energized. (There is a fixed 45 seconds ON
and 30 seconds OFF delay on a W call.)
DELAY Pins ꢀ The DELAY jumper is used to set the spe-
cific motor fan operation during cooling mode. Depending
on the application, one of four options may be chosen by
moving the jumper to the appropriate set of pins.
Table 4
Factory Blower Speed Tap Settings
CBWMV
Blower
Coil
Speed Tap Selection
#1 Pins Jumpered ꢀ
Cool Pin
Heat Pin
Adjust
Delay
A
Motor runs at 100% until demand is satisfied.
−24B−040
−36B−070
−36C−090
−60C−100
−60C−120
1
3
3
4
4
2
4
4
4
4
NORM
NORM
NORM
NORM
NORM
4
4
4
4
4
OFF
OFF
B
Once demand is met, motor ramps down to stop.
To change jumper positions, gently pull the jumper off the
pins and place it on the desired set of pins. The following
section outlines the different jumper selections available
and conditions associated with each one. Refer to figure
14.
#2 Pins Jumpered ꢀ
A
Motor runs at 100% until demand is satisfied.
OFF
OFF
After the CFM for each application has been determined,
the jumper settings must be adjusted to reflect those given
of CFM volumes most closely matches the desired CFM.
Once a specific row has been chosen (+, NORMAL, or −),
CFM volumes from other rows cannot be used. Below are
descriptions of the jumper selections.
B
C
Once demand is met, motor runs at 100% for 45
seconds. Then,
ramps down to stop.
NOTE − Blower OFF DELAY also applies during heat
pump operation
#3 Pins Jumpered ꢀ
A
B
Motor runs at 82% for approximately 7−1/2 min-
utes. If demand has not been satisfied after 7−1/2
minutes,
ADJUST Pins ꢀ The ADJUST pins allow the motor to run
at normal speed, approximately 10% higher, or approxi-
gives three rows (+, NORMAL, and −) with their respective
CFM volumes. Notice that the normal adjustment setting
for heat speed position #3 is 1070 CFM. The + adjustment
setting for that position is 1180 CFM and for the − adjust-
ment setting is 940 CFM. After the adjustment setting has
been determined, chose the remainder speed jumper set-
tings from those offered in the table in that row.
motor runs at 100% until demand is satisfied.
OFF
OFF
C
Once demand is met, motor ramps down to stop.
#4 Pins Jumpered ꢀ
A
B
Motor runs at 50% for 30 seconds.
The TEST pin is available to bypass the BDC3 control and
run the motor at approximately 70% to test that the motor is
operational. This is beneficial primarily in troubleshooting.
G must be energized for motor to run.
Motor then runs at 82% for approximately 7−1/2
minutes. If demand has not been satisfied after
7−1/2 minutes.
C
D
Motor runs at 100% until demand is satisfied.
Once demand is met, motor runs at 50% for 30
seconds. Then,
COOL Pins ꢀ The COOL jumper is used to determine the
CFM during either 1) cooling or 2) heat pump operation
without a W1 call for electric heat. These jumper selections
are activated for cooling when Y1 and/or Y2 and DS termi-
nals in the CBWMV unit are energized and for heating
when Y1 and/or Y2 is energized.
OFF
OFF
E
ramps down to stop.
Page 13
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Table 5
CBWMV−24B−040 Blower Performance
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 2, Cooling
Speed − 1, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 4%.
BDC3 Jumper Speed Positions
ꢁADJUST"
Jumper
Setting
1st Stage ꢁCOOL" Speed
1
2
3
4
cfm
610
560
510
L/s
290
265
240
cfm
770
700
630
L/s
365
330
295
cfm
930
830
750
L/s
440
390
355
cfm
1010
910
L/s
475
430
380
+
NORM
ꢀ
810
ꢁHEAT" Speed
2nd Stage ꢁCOOL" Speed
ꢁADJUST"
Jumper
Setting
1
2
3
4
1
2
3
4
cfm
820
750
970
L/s
385
355
315
cfm
990
900
810
L/s
465
425
380
cfm
1180
1070
940
L/s
555
505
445
cfm
1340
1230
1080
L/s
630
580
510
cfm
880
800
720
L/s
415
375
340
cfm
1120
1000
900
L/s
530
470
425
cfm
1340
1200
1080
L/s
630
565
510
cfm
1440
1300
1170
L/s
680
615
550
+
NORM
ꢀ
The effect of static pressure and filter resistance is included in air volumes shown.
1st stage COOL is approximately 70% of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony zone control applications − Minimum blower speed is 400 cfm. Max cfm is the same as 2nd stage cool position.
Table 6
CBWMV−36B−070 Blower Performance
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling
Speed − 3, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 4%.
BDC3 Jumper Speed Positions
ꢁADJUST"
Jumper
Setting
1st Stage ꢁCOOL" Speed
1
2
3
4
cfm
590
545
490
L/s
280
255
230
cfm
745
680
600
L/s
350
320
280
cfm
895
805
725
L/s
420
380
340
cfm
975
890
780
L/s
460
420
370
+
NORM
ꢀ
ꢁHEAT" Speed
2nd Stage ꢁCOOL" Speed
ꢁADJUST"
Jumper
Setting
1
2
3
4
1
2
3
4
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
+
NORM
ꢀ
790
730
640
370
345
300
980
870
770
465
410
360
1140
1040
920
540
490
435
1310
1190
1070
620
560
505
850
775
700
400
365
330
1090
990
515
465
410
1300
1190
1065
620
560
500
1430
1280
1150
675
605
540
870
The effect of static pressure and filter resistance is included in air volumes shown.
1st stage COOL is approximately 70% of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony zone control applications − Minimum blower speed is 400 cfm. Max cfm is the same as 2nd stage cool position.
Page 14
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Table 7
CBWMV−36C−090 Blower Performance
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling
Speed − 3, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 5%.
BDC3 Jumper Speed Positions
ꢁADJUST"
Jumper
Setting
1st Stage ꢁCOOL" Speed
1
2
3
4
cfm
620
570
520
L/s
290
270
245
cfm
770
700
630
L/s
365
330
295
cfm
930
830
760
L/s
440
390
360
cfm
1010
910
L/s
475
430
380
+
NORM
ꢀ
810
ꢁHEAT" Speed
2nd Stage ꢁCOOL" Speed
ꢁADJUST"
Jumper
Setting
1
2
3
4
1
2
3
4
cfm
820
760
675
L/s
385
360
320
cfm
1000
900
L/s
470
425
380
cfm
1180
1070
950
L/s
555
505
450
cfm
1340
1220
1100
L/s
630
575
520
cfm
890
800
720
L/s
420
380
340
cfm
1130
1020
900
L/s
535
480
425
cfm
1340
1220
1100
L/s
630
575
520
cfm
1450
1310
1180
L/s
685
620
555
+
NORM
ꢀ
810
The effect of static pressure and filter resistance is included in air volumes shown.
1st stage COOL is approximately 70% of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony zone control applications − Minimum blower speed is 400 cfm. Max cfm is the same as 2nd stage cool position.
Table 8
CBWMV−60C−100 Blower Performance
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling
Speed − 3, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 5%.
BDC3 Jumper Speed Positions
ꢁADJUST"
Jumper
Setting
1st Stage ꢁCOOL" Speed
1
2
3
4
cfm
1110
1000
930
L/s
525
470
440
cfm
1250
1130
1040
L/s
590
535
490
cfm
1380
1250
1130
L/s
650
590
535
cfm
1530
1380
1260
L/s
720
650
595
+
NORM
ꢀ
ꢁHEAT" Speed
2nd Stage ꢁCOOL" Speed
ꢁADJUST"
Jumper
Setting
1
2
3
4
1
2
3
4
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
cfm
L/s
+
NORM
ꢀ
1500
1370
1250
710
645
590
1700
1540
1380
800
725
650
1880
1720
1540
885
810
725
2100
1920
1720
990
905
810
1540
1400
1270
725
660
600
1760
1600
1420
830
755
670
1970
1800
1600
930
850
755
2200
1980
1780
1040
935
840
The effect of static pressure and filter resistance is included in air volumes shown.
1st stage COOL is approximately 70% of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony zone control applications − Minimum blower speed is 600 cfm. Max cfm is the same as 2nd stage cool position.
Page 15
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Table 9
CBWMV−60C−120 Blower Performance
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling
Speed − 4, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 5%.
BDC3 Jumper Speed Positions
ꢁADJUST"
Jumper
Setting
1st Stage ꢁCOOL" Speed
1
2
3
4
cfm
1100
990
L/s
520
465
440
cfm
1250
1130
1020
L/s
590
535
480
cfm
1400
1260
1130
L/s
660
595
535
cfm
1560
1400
1260
L/s
735
660
595
+
NORM
ꢀ
930
ꢁHEAT" Speed
2nd Stage ꢁCOOL" Speed
ꢁADJUST"
Jumper
Setting
1
2
3
4
1
2
3
4
cfm
1510
1380
1240
L/s
715
650
585
cfm
1720
1560
1380
L/s
810
135
650
cfm
1900
1740
1540
L/s
895
820
725
cfm
2120
1920
1720
L/s
1000
905
cfm
1570
1410
1260
L/s
740
665
595
cfm
1800
1620
1440
L/s
850
765
680
cfm
2000
1820
1620
L/s
945
860
765
cfm
2200
2020
1810
L/s
1040
955
+
NORM
ꢀ
810
855
The effect of static pressure and filter resistance is included in air volumes shown.
1st stage COOL is approximately 70% of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony zone control applications − Minimum blower speed is 600 cfm. Max cfm is the same as 2nd stage cool position.
Initial Air Purging
Air Bleed Valve Location
After all plumbing connections have been made, leak
tested and flushed, the water heating device is ready to be
filled with water and purged of air. Air bleeder valves are
provided as a convenience for installations that are not
equipped with purge manifolds.
1. Make sure electrical power and gas supply to system
are OFF.
2. Remove CBWMV coil section access panel.
3. Remove cap from highest air bleed valve and depress
valve stem until water is released. This may be done with
VALVE
SHOWN
WITH CAP ON
4. Replace cap on valve and access panel.
5. Apply electrical power and gas supply to the system.
6. Follow the System Start−Up section to operate the sys-
tem. Complete purging of air after unit has gone
through initial start−up.
Figure 15
Page 16
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2. Motors are pre−lubricated for extended life; no further
lubrication is required.
System Adjustments
Freezestat
Verify that the freezestat functions.
Timed−ON and Timed−OFF Delays
The 45−second timed−ON delay and the 30−second timed−
OFF delay for heating (time that the blower operates after
the heat demand has been satisfied) is not adjustable.
Service Filters
Filters must be cleaned or replaced when dirty to assure
proper unit operation.
Blower Speeds
Select the blower speed by moving the pins on the variable
Winterizing CBWMV Water Coil
Refer to the speed selection chart on unit wiring diagram.
If unit is installed in an unconditioned space, the piping be-
tween the CBWMV unit and the water heating device
should be insulated. If power is removed from the unit, wa-
ter must be drained from the system to prevent freezing.
NOTE − To check for proper CFM, take the reading exter-
nal to the unit. The coil must be dry when you take the
reading.
Repair Parts List
Annual Service
The following repair parts are available. When ordering
parts, include the complete unit model number listed on the
unit rating plate of each piece of equipment.
WARNING
Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.
Cabinet Parts
S
Blower Access Panel
S
Coil Access Panel
Hot Water Coil Parts
S
Coil Replacement Kit
Blower Part
At the beginning of each heating season, system should be
checked as follows by a qualified service technician:
S
S
S
Blower Wheel
Blower Motor
Electrical
1. Check all wiring for loose connections.
Blower Housing
Electrical Parts
2. Check for correct voltage at CBWMV unit (unit operat-
ing).
S
S
S
S
BDC3 Board
Transformer
3. Check to see that blower is operating.
Circuit Breaker, 24VAC
3PDT Relay
Blower
1. Check and clean blower wheel.
Page 17
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WARNING
WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal
control box components must be available for troubleshooting, a common practice is to
construct a ꢁby−pass" of the door interlock switch. When such a by−pass is in place, a potential
shock hazard is present which can cause injury or death. Make sure any door interlock switch
by−pass has been removed after troubleshooting is complete and BEFORE attempting any re-
pairs to the control box components!
Troubleshooting: Continuous Fan Sequence of Operation
CONDITIONS:
Power On
Normal Operation LED: Steady Flash
NO
Thermostat (S1) Calls for Continuous Fan, G−Only
YES
Check for 24 Volts Between ’G’ and C at A15 Terminal Strip
Check for 24 Volts Between Pins 3 and 15 on J49
Blower Operates at the Continuous Fan Speed
Selected by COOL Jumper and ADJUST Jumper
Positions on the BDC3 Control (A52)
NO
YES
RUN Light on BDC3 Control (A52) illuminates to Indi-
cate a Continuous Fan Call
YES
CFM Light on A52 Indicates Blower CFM Selection
with 100CFM / Blink
YES
Thermostat (S1) Continuous Fan Demand Satisfied
YES
Blower Off
Page 18
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WARNING
WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal
control box components must be available for troubleshooting, a common practice is to
construct a ꢁby−pass" of the door interlock switch. When such a by−pass is in place, a potential
shock hazard is present which can cause injury or death. Make sure any door interlock switch
by−pass has been removed after troubleshooting is complete and BEFORE attempting any re-
pairs to the control box components!
Troubleshooting: Cooling Sequence of Operation
CONDITIONS:
Power On
Normal Operation LED: Steady Flash
Thermostat (S1) Provides 24 Volt Cooling Call to In-
NO
Check for 24 Volts Between Y and C at A15 Terminal Strip
door Blower (B3)
YES
Blower (B3) Operates at the 2nd Stage
NO
Check for 24 Volts
Between Pins 14 and
3 on J49
NO
Cooling Speed Determined by COOL,
DELAY and ADJUST Jumper Positions on
the BDC3 Control (A52)
2 Stage Condensing Unit?
YES
YES
Blower (B3) Operates at the 1st Stage Cooling Speed
Determined by COOL, DELAY and ADJUST Jumper
Positions on the BDC3 Control (A52)
CFM Light on A52 Indicates Blower CFM
Selection with 100CFM / Blink
NO
YES
CFM Light on A52 Indicates Blower CFM Selection with
100CFM / Blink
Thermostat (S1) Demand Satisfied
YES
YES
Blower Shuts Off According to the DELAY
Jumper Position on the BDC3 Control
(A52)
Check for 24 Volts Between Y
and C on A15 Terminal Strip
Check for 24 Volts Between
Pins 6 and 3 on J49
YES
Demand for Cooling Satisfied
NO
NO
Check for 24 Volts Between Y2 on
TB1 and C on A15 Terminal Strip
Thermostat (S1) Calls for
2nd Stage Cooling
First Stage Demand for Cooling Satisfied?
YES
YES
NO
Blower Operates at the 2nd
Stage Cooling Speed Deter-
mined by COOL, DELAY and
ADJUST Jumper Positions
on the BDC3 Control (A52)
Check for 24 Volts Between Pins 14
and 3 on J49
Blower Shuts Off According to the DELAY Jumper
Position on the BDC3 Control (A52)
YES
Demand for Cooling Satisfied
YES
CFM Light on A52 Indi-
cates Blower CFM Selec-
tion with 100CFM / Blink
YES
2nd Stage Thermostat
(S1) Demand Satisfied
YES
Blower Returns to 1st
Stage Cooling Speed
Page 19
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WARNING
WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal
control box components must be available for troubleshooting, a common practice is to
construct a ꢁby−pass" of the door interlock switch. When such a by−pass is in place, a potential
shock hazard is present which can cause injury or death. Make sure any door interlock switch
by−pass has been removed after troubleshooting is complete and BEFORE attempting any re-
pairs to the control box components!
Troubleshooting: Heating Sequence of Operation
CONDITIONS:
Power On
Normal Operation LED: Steady Flash
NO
Thermostat (S1) Calls for Heat
Check for 24 Volts Between
W and C at A52 Terminal Strip
YES
Fixed blower−ON delay (45−second) complete
Blower Operates at the Heating Speed Selected by
NO
HEAT Jumper and ADJUST Jumper Positions on
the BDC3 Control (A52)
Check for 24 Volts Between Pins 3 and 2 on J49
YES
CFM Light on A52 Indicates Blower
Speed Selection with 100CFM / Blink
YES
Thermostat (S1) Demand Satisfied
YES
30 Second Blower Off Delay (Fixed) Complete
YES
Demand for Heat Satisfied
Page 20
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