Lennox CB29M-26, CB29M-31, CB30M, CB29M-21, CB29M-41 Installation Manual
...
INSTALLATION
E2005 Lennox Industries Inc.
Dallas, Texas, USA
IMPORTANT
For downflow application, kit number 83M57
(LB−109844A) is required. Kit is not provided with
coil blower; order separately.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC’s and HCFC’s) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration may be levied for noncompliance.
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of
California to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
INSTRUCTIONS
CB29M & CB30M
Elite® Series Units
MULTI−POSITION BLOWER COILS
504,719M
09/05
Supersedes 04/05
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Table of Contents
CB29M & CB30M Series Units 1. . . . . . . . . . . . . . . . . .
General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List 1. . . . . . . . . . . . . . . . . . . . . . . .
CB29M Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . .
CB30M Unit Dimensions 4. . . . . . . . . . . . . . . . . . . . . . .
Requirements 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Piping Connections 8. . . . . . . . . . . . . . . . . . . . . . .
Condensate Drain 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filters 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sealing the Unit 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Speed Adjustments 10. . . . . . . . . . . . . . . . . . . . .
Electrical 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Wiring Diagrams 17. . . . . . . . . . . . . . . . . . . . . . .
CB29M & CB30M Series Units
The Lennox CB29M and CB30M Elite® series blower coil
units are designed for installation with a matched remote
outdoor unit and optional field−installed electric heat. The
blower coil units are for indoor installation only.
The CB29M and CB30M units, designed for multi−positional installations, are completely assembled at the factory
and shipped ready for upflow or horizontal right−hand discharge installation.
General
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installing the unit
Check equipment for shipping damage; if found, immediately contact the last carrier.
Shipping and Packing List
Each CB29M and CB30M unit package contains:
1 − Assembled blower coil unit
Litho U.S.A.
09/05 504,719M
*2P0905* *P504719M*
Page 1
CB29M Upflow and Downflow Unit Dimensions − inches (mm)
3/4
(19)
SUPPLY
AIR OPENING
3/4
(19)
LOW VOLTAGE
INLETS (TOP &
RIGHT SIDE)
5/8
(16)
11-1/16
(281)
LINE VOLTAGE
INLETS (TOP &
LEFT SIDE)
Top View
D
BC
AIR
FLOW
OPTIONAL
ELECTRIC
HEAT
(FIELD−
INSTALLED)
A
SUCTION
LINE
LIQUID
RETURN AIR
5/8
(16)
F
Front View Side View
5/8
(16)
FILTER
ACCESS
LINE
Upflow Position
(25)
PIPING PLATE DETAIL
(For upflow and downflow positions)
1-1/8 (29)
2
(51)
5-3/8
(137)
2-3/4
(70)
1-3/4 (44)
BLOWER
COIL
RETURN AIRFILTER
1
E
(16)
5/8
INSTALLED)
LOW VOLTAGE
(RIGHT SIDE)
LINE VOLTAGE
(LEFT SIDE)
FILTER
SUCTION
LINE
LIQUID
LINE
OPTIONAL
ELECTRIC
HEAT
(FIELD−
4-3/8 (111)
SUCTION LINE
CONDENSATE
DRAINS (2)
(HORIZONTAL)
LIQUID LINE
CONDENSATE
DRAINS (2)
(UPFLOW AND
DOWNFLOW)
3-1/2 (89)
5/8
(16)
5/8 (16)
E
1 (25)
F
RETURN
AIR
OPENING
Top View
BC
COIL
11-1/16 (281)
BLOWER
SUPPLY
AIR
5/8
(16)
5/8
(16)
AIR FLOW
SUPPLY AIR
D
Front ViewSide View
Downflow Position
(Kit number 83M57 (LB−909844A) required to convert
unit to downflow applications.)
FILTER
ACCESS
5/8 (16)
5/8
(16)
A
Model No. CB29M-21/26 & CB29M-31 CB29M-41 & CB29M-46 CB29M-51 & CB29M-65
Dimension inch mm inch mm inch mm
A 45-1/4 1149 49-1/4 1251 52-1/2 1334
B 16-1/4 413 21-1/4 540 21-1/4 540
C 20-5/8 524 20-5/8 524 22-5/8 575
D 14-3/4 375 19-3/4 502 19-3/4 502
E 19 483 19 483 21 533
F 15 351 20 508 20 508
Page 2
504719M 09/05
CB29M Horizontal Left− and Right−Hand Unit Dimensions − inches (mm)
CONDENSATE
DRAINS (2)
(UPFLOW AND
DOWNFLOW)
CONDENSATE
DRAINS (2)
(HORIZONTAL)
PIPING
PLATE
DETAIL
3/4
(19)
5/8
(16)
5/8
(16)
5/8
(16)
3/4
(19)
5-3/8
(137)
5-3/4
(46)
F
RETURN
AIR
OPENING
End View
11-1/16
(281)
2
(51)
1-3/4
(44)
E
LOW VOLTAGE
INLETS (TOP &
LEFT SIDE)
FILTER
LIQUID
LINE
SUCTION
1-1/2
(38)
LINE
1-1/8
(29)
4-3/8
(111)
LIQUID
LINE
COIL
SUCTION
LINE
Top View
BLOWER
OPTIONAL ELECTRIC
HEAT (FIELD−INSTALLED)
5/8
(16)
C
A
(25)
1
FILTER ACCESS
AIR
FLOW
Front View
B
Horizontal Position (Right-Hand Air Discharge)
C
OPTIONAL ELECTRIC
HEAT (FIELD INSTALLED)
5/8
(16)
BLOWER
FILTER
Top View
A
COIL
SUCTION
LINE
LIQUID
LINE
For dimensions A"
through F", see
chart on Page 2.
LINE VOLTAGE
INLETS (TOP &
RIGHT SIDE)
LOW VOLTAGE
INLETS (BOTTOM
& RIGHT SIDE)
4-3/8
(111)
PIPING
1-1/8
PLATE
DETAIL
SUCTION
LIQUID
(29)
LINE
LINE
11-1/16
(281)
SUPPLY
AIR
OPENING
End View
2
(51)
5/8
(16)
3/4
(19)
5-3/8
(137)
3/4
(19)
D
3/4
(19)
3/4
(19)
SUPPLY
D
AIR
OPENING
LINE VOLTAGE INLETS
(BOTTOM & LEFT SIDE)
End View
FILTER
5-3/4
(146)
ACCESS
1-1/2
(38)
B
CONDENSATE DRAINS (2)
(HORIZONTAL)
AIR
FLOW
Front View
1-3/4
(44)
Horizontal Position (Left-Hand Air Discharge)
Page 3
(25)
1
E
RETURN
AIR OPENING
End View
CB29M/CB30M SERIES
5/8
F
(16)
5/8
(16)
CB30M Upflow and Downflow Unit Dimensions − inches (mm)
3/4
(19)
SUPPLY
AIR OPENING
D
11-1/16
(281)
LINE VOLTAGE
INLETS (TOP &
LEFT SIDE)
Top View
3/4
(19)
LOW VOLTAGE
INLETS (TOP &
RIGHT SIDE)
5/8
(16)
BC
AIR
FLOW
G
OPTIONAL
ELECTRIC
HEAT
(FIELD−
INSTALLED)
A
SUCTION
H
RETURN AIR
5/8
(16)
F
Front View Side View
5/8
(16)
FILTER
ACCESS
LINE
LIQUID
LINE
Upflow Position
(25)
PIPING PLATE DETAIL
(For upflow and downflow positions)
1-1/8 (29)
2
(51)
5-3/8
(137)
2-3/4
(70)
1-3/4 (44)
BLOWER
COIL
LOW VOLTAGE
(RIGHT SIDE)
LINE VOLTAGE
RETURN AIRFILTER
1
E
5/8
(16)
FILTER
SUCTION
LINE
LIQUID
LINE
OPTIONAL
ELECTRIC
HEAT
(FIELD−
INSTALLED)
(LEFT SIDE)
4-3/8 (111)
SUCTION LINE
CONDENSATE
DRAINS (2)
(HORIZONTAL)
LIQUID LINE
CONDENSATE
DRAINS (2)
(UPFLOW AND
DOWNFLOW)
3-1/2 (89)
5/8
(16)
5/8 (16)
E
1 (25)
F
RETURN
AIR
OPENING
Top View
BC
COIL
11-1/16 (281)
BLOWER
SUPPLY
AIR
5/8
(16)
5/8
(16)
AIR FLOW
SUPPLY AIR
D
Front ViewSide View
Downflow Position
(Kit number 83M57 (LB−909844A) required to convert
unit to downflow applications.)
5/8
(16)
FILTER
ACCESS
H
A
G
5/8 (16)
Model No. CB30M-21/26 CB30M-31 CB30M-41 CB30M-46 CB30M-51 & CB30M-65
Dimension inch mm inch mm inch mm inch mm inch mm
A 45-1/4 1149 49-1/4 1251 51 1295 52-1/2 1334 58-1/2 1486
B 16-1/4 413 21-1/4 540 21-1/4 540 21-1/4 540 21-1/4 540
C 20-5/8 524 20-5/8 524 22-5/8 575 22-5/8 575 24-5/8 625
D 14-3/4 375 19-3/4 502 19-3/4 502 19-3/4 502 19-3/4 502
E 19 483 19 483 21 533 21 533 23 584
F 15 351 20 508 20 508 20 508 20 508
G 24-5/8 625 24-5/8 625 26-3/8 670 27-7/8 708 27-7/8 708
H 20-5/8 524 24-5/8 625 24-5/8 625 24-5/8 625 30-5/8 778
Page 4
504719M 09/05
CB30M Horizontal Left− and Right−Hand Unit Dimensions − inches (mm)
CONDENSATE
DRAINS (2)
(UPFLOW AND
DOWNFLOW)
CONDENSATE
DRAINS (2)
(HORIZONTAL)
PIPING
PLATE
DETAIL
3/4
(19)
5/8
(16)
5/8
(16)
5/8
(16)
3/4
(19)
5-3/8
(137)
5-3/4
(46)
F
RETURN
AIR
OPENING
End View
11-1/16
(281)
2
(51)
1-3/4
(44)
E
LOW VOLTAGE
INLETS (TOP &
LEFT SIDE)
FILTER
LIQUID
LINE
SUCTION
(25)
1-1/2
(38)
1
LINE
1-1/8
(29)
4-3/8
(111)
LIQUID
FILTER ACCESS
LINE
COIL
SUCTION
LINE
H
Top View
FLOW
Front View
BLOWER
OPTIONAL ELECTRIC
HEAT (FIELD−INSTALLED)
A
G
AIR
C
5/8
(16)
B
Horizontal Position (Right-Hand Air Discharge)
C
OPTIONAL ELECTRIC
HEAT (FIELD INSTALLED)
5/8 (16)
BLOWER
FILTER
Top View
A
G
COIL
SUCTION
LINE
H
LIQUID
LINE
For dimensions A"
through H", see
chart on Page 4.
LINE VOLTAGE
INLETS (TOP &
RIGHT SIDE)
LOW VOLTAGE
INLETS (BOTTOM
& RIGHT SIDE)
4-3/8
(111)
PIPING
1-1/8
PLATE
DETAIL
SUCTION
LIQUID
(29)
LINE
LINE
11-1/16
(281)
SUPPLY
AIR
OPENING
End View
2
(51)
5/8
(16)
3/4
(19)
5-3/8
(137)
3/4
(19)
D
3/4
(19)
SUPPLY
3/4
(19)
D
AIR
OPENING
LINE VOLTAGE INLETS
(BOTTOM & LEFT SIDE)
B
CONDENSATE DRAINS (2)
(HORIZONTAL)
FLOW
End View
Horizontal Position (Left-Hand Air Discharge)
Requirements
Installation of Lennox blower coil units with or without optional electric heat must conform with standards in the National Fire Protection Association (NFPA) Standard for
Installation of Air Conditioning and Ventilation Systems
NFPA No. 90A," and Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems NFPA No. 90B," manufacturer’s installation instructions and local municipal building codes.
This unit is certified for installation clearances to combustible material as listed on the unit rating plate. Accessibility
and service clearances must take precedence over combustible material clearances.
AIR
Front View
Page 5
1-3/4
(44)
5-3/4
(146)
FILTER
ACCESS
1-1/2
(38)
(25)
1
E
RETURN
AIR OPENING
End View
5/8
F
(16)
5/8
(16)
Installation
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage,
personal injury or loss of life. Installation and service must be performed by a qualified installer or
service agency.
The CB29M and CB30M units are factory−configured for
upflow or horizontal right−hand discharge installation. For
downflow or horizontal left−hand discharge, some field
modification is required.
CB29M/CB30M SERIES
IMPORTANT
2. No further adjustment is necessary. Set unit so that it is
sloped 1/4 inch toward the drain pan end of the unit.
Kit number 83M57 (LB−109844A) must be installed
for downflow application.
Disassembling CB30M Blower Coil Unit
These units are shipped from the factory fully assembled.
The CB30M blower coil unit’s sections may be separated
to facilitate movement at some installation sites. If required, disassemble the unit as follows:
1. Remove access panels from both blower and coil assemblies. This will lighten the cabinet for lifting.
2. Remove one screw from the left and right posts inside
the unit. Remove one screw from each side on the
back of the unit. Unit sections will now separate.
3. To reassemble, align cabinet sections and reinstall
screws. Replace access panels.
Upflow Application
1. Remove access panels. Remove corrugated padding
from the space between the blower and coil assemblies.
2. To ensure proper operation, remove the horizontal
drain pan from units in upflow configurations (see figure 1).
3. Place unit in desired location. Make sure that unit is
level. Connect return and supply air plenums as required using sheet metal screws.
4. Install units that have no return air plenum on a mounting stand at least 14" from the floor for proper air return. Lennox offers an optional upflow unit stand.
(45K31 for CB29M−21, −26, and −31; 45K32 for
CB29M−41 through −65.)
NOTE − For horizontal applications, an auxiliary drain
pan is recommended. Refer to local codes.
NOTE − For horizontal applications in high humidity
areas, seal around the exiting drain pipe, liquid line,
and suction line to prevent infiltration of humid air.
Right−Hand Discharge Configuration
Downflow
Drain Pan
Horizontal
Drain Pan
No Adjustment
is Necessary
Horizontal Drip ShieldUpflow/
Figure 2
3. If the unit is to be suspended, it must be supported
along the entire length of the cabinet (see figure 3). If
using a chain or strap, attach a piece of angle iron or
sheet metal to the unit (either above or below the unit),
so that the full length of the cabinet is supported. Use
securing screws which are no longer than 1/2 inch to
avoid damaging the coil or filter. Use sheet metal
screws to connect the return and supply air plenums.
Suspending Horizontal Unit
Angle Iron or
Sheet Metal
1/2 IN.
SCREWS
MAX.
Electrical Inlet Clearance
4 in. (102 mm)
Upflow Configuration
Upflow/
Downflow
Drain Pan
Horizontal Drain Pan
(Remove for Optimum Performance)
Figure 1
Horizontal Right−Hand Discharge Application
1. Remove access panels. Remove corrugated padding
from the space between the blower and coil assembly.
FRONT VIEW END VIEW
Figure 3
CAUTION
When removing the coil, there is possible danger of
equipment damage and personal injury. Be careful
when removing the coil assembly from a unit
installed in right− or left−hand applications. The coil
may tip into the drain pan once it is clear of the cabinet. Support the coil when removing it.
504719M 09/05
Page 6
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