*12,600 to 65,500 Btuh (3.7 to 19.2 kW) Cooling Capacity
11,500 to 60,000 Btuh (3.4 to 17.6 kW) Heat Pump Heating Capacity
6,400 to 102,400 Btuh (1.9 to 30.0 kW) Optional Electric Heat
*ARI Standard 210/240 Ratings With Matching Outdoor Unit
CB19/
CBH19
Bulletin #210056
January 1995
Supersedes
April 1994
Applications —
signed for multi-position installation in a basement, utility
room, alcove, closet, crawlspace or attic. Units are applicable
to expansion valve systems in cooling applications and
check and expansion valve systems in heat pump applications. Units have factory installed check and expansion valve.
Several models are available in varying sizes with a wide
range of cooling and heating capacities. See Condensing Unit
bulletins in section Cooling Units — Condensing Units for
cooling capacities. See Heat Pump Outdoor Unit Bulletins in
section Heat Pumps — Matched Remote Systems for cooling
and heating capacities. Optional field installed electric heaters
are available in several sizes for additive heating capacity.
CB19 models are applicable to up-flow or down-flow discharge air applications. Units are shipped for up-flow applications and may easily be field converted to the downflow position by turning the unit upside down and
repositioning the coil, drip shields and cabinet access panel.
Filters are not furnished and must be provided by the installer. An optional side return air adapter with filter(s) is available for up-flow applications only. An optional additive
base is available for models with electric heat installed in
the down-flow position on combustible floors.
CBH19 models are designed for horizontal discharge air applications. Units are furnished with left hand air discharge as
standard and may be field changed to right hand discharge by
turning the unit over (end for end) and repositioning the coil.
CBH19-51 and CBH19-65 models are furnished in a two piece
cabinet with blower and optional electric heaters in one section and the indoor coil in the other. Hardware is furnished for
field connection of cabinets. Filters are not furnished and
must be provided by the installer.
The CB19 and CBH19 blower coil units are de-
CB19 MODEL — UP-FLOCB19 MODEL — DOWN-FLO
CBH19 MODEL — HORIZONTAL
Typical Applications
Horizontal Installation
Up-Flow Installation
with optional electronic air cleaner
The maple leaf symbol in this bulletin denotes Canadian only usage where applicable
NOTE — Due to Lennox’ ongoing committment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability.
Down-Flow Installation
1995 Lennox Industries Inc.
FEATURES
Completely Tested —
ing condensing units in the Lennox Research Laboratory environmental test room in accordance with ARI Standard
210/240-89. Optional electric heaters are rated in accordance
with U.S. Department of Energy (DOE) test procedures and
Federal Trade Commission (FTC) labeling regulations. Blower
performance data is according to actual unit tests conducted
in Lennox air test chamber. Blower-coil units and components
within are bonded for grounding to meet safety standards for
servicing required by U.L., C.S.A., CEC and NEC.
Cabinet —
completely insulated with thick fiberglass insulation. The prepainted steel cabinets have a finish of mildly textured enamel
with a primer coat on the unpainted side of all panels. Removable panels provide complete service access. Electrical inlets
are provided in both sides of cabinet. Return air entry is possible in either side or bottom of cabinet on up-flow units.
Drain Pan —
pipe drains extended outside of cabinet for ease of connection. See dimension drawings.
Constructed of heavy gauge galvanized steel and
Deep, corrosion resistant drain pan has dual
Direct Drive Blower —
built direct drive blower. Each blower is statically and dynamically balanced as an assembly before it is installed in the
unit. Multi-speed motor is resiliently mounted. A choice of
blower speeds is available. See blower performance tables.
Change of blower speeds is easily accomplished by a simple
change in wiring.
Refrigerant Line Connections —
lines have sweat connections and extend outside of the cabinet
for ease of connection. See dimension drawings for locations.
Check and Expansion Valve Furnished —
sion valve furnished and factory installed on all models.
Copper Tube/Enhanced Fin Evaporator Coil —
signed twin coils, assembled in a ‘V’ configuration, provides
extra large surface and contact area, excellent heat transfer
and low air resistance for maximum efficiency. Precise circuiting gives uniform refrigerant distribution. Lennox fabricated coil is constructed of precisely spaced ripple-edged aluminum fins fitted to durable seamless copper tubes. Fins are
strengthened to resist bending and are equipped with collars
that grip tubing for maximum contact area. Lanced fins provide maximum exposure of fin surface to air stream. Flared
shoulder tubing joints and silver soldering provide tight, leakproof joints. Long life copper tubing is easy to field service.
Coil is thoroughly factory tested under high pressure to insure leakproof construction.
Transformer and Blower Cooling Relay —
former and blower cooling relay are furnished as standard
equipment and are factory installed in the unit control box.
A terminal strip is also furnished as standard.
Blower coil units are tested with match-
Equipped with a Lennox designed and
Suction (vapor) and liquid
Check and expan-
Lennox de-
A 24 volt trans-
OPTIONAL ACCESSORIES (Must Be Ordered Extra)
Electric Heat (Optional) —
internal to the unit cabinet and are available in several kw sizes,
see Electric Heat table. The helix wound nichrome bare heating elements are exposed directly in the air stream resulting in
instant heat transfer, low element temperatures and long service life. Each heating element is equipped with accurately located limit control with fixed temperature off setting and automatic reset. In addition, elements have supplemental thermal
cutoff safety fuses providing positive protection in case of excessive temperatures. Cutoff fuses are mounted external to
the element face plate for quick and easy replacement. Thermal sequencer relay brings the heating elements on and off line,
in sequence and equal increments, with a time delay between
each element. Sequencer also initiates and terminates blower
operation. Heating control relay(s), is furnished as standard.
Control box and access cover are constructed of heavy gauge
galvanized steel. Heaters are factory assembled with controls
installed and wired and only require plug-in field connection.
Additive electric heaters field install
Circuit Breakers —
(208/240v-1ph) and ECB19-15,-20 and -25 kw (208/240v-3ph)
electric heaters are equipped with circuit breakers to provide
overload and short circuit protection. Breakers are factory
wired and mounted on electric heat unit. Circuit breakers are
current sensitive and temperature actuated to shut off heater if
current draw is excessive. Must be reset manually. Circuit
breakers qualify as the disconnect means at unit in many
areas and eliminate the need for a field provided disconnect.
Consult local electrical code in your area.
ECB19-12.5,-15,-20,-25 and -30 kw
Single-Point Power Source Control Box (Optional) —
Box (21H39) may be used with optional electric heat when
two or three circuits (if required by code) are specified. Field
installs external to the unit cabinet on either side or top. Provides single power service connection to the unit.
Constructed of heavy gauge steel with baked enamel finish,
prepunched mounting holes, electrical inlet knockouts, and
terminal strip. Removeable cover provides easy access.
Box is 7” x 7” x 4” deep (178mm x 178mm x 102mm), shipping
weight is 5 lbs. (2 kg.)
CCB1 EfficiencyPlus Humidity Control (Optional) —
CCB1 Humidity Control (35H00) is an electronic control which
installs next to the room thermostat and allows the selection of
the desired indoor humidity level in the cooling mode. During
the heating season the control is inoperable. The CCB1 controls
the indoor humidity by altering the indoor blower speed
and the compressor speed.
Humidity level desired may be
accomplished by adjusting a
vertical slide to a set point on
a scale of 40% thru 60% with
50% recommended as the initial set point. Five indicator
lights (MIN — MAX) in a bar
graph configuration indicate
the difference in the actual relative humidity and the set point. This indicates the demand
imposed on the system equipment, the more lights on, the
longer the equipment will operate to obtain the desired humidity level. If no lights are on, the humidity is at or below the
set point. Control is not furnished and must be ordered extra.
Requires EBR1 Blower Relay Kit
EBR1 Blower Relay Kit (Optional) —
(75H90) allows CCB1 to be used with CB19/CBH19 blower
coil units.
Down-Flow Additive Base (Optional) —
base is required for models with electric heat installed in the
down-flow position on combustible floors. Base is not furnished
and must be ordered extra for field installation. See Specifications table and dimension drawing.
Air Filters (Not Furnished) —
Specifications tables for sizes. Filter rails are provided in return
air opening of unit. See dimension drawings.
Filters must be ordered extra. See
EBR1 Blower Relay Kit
An optional additive
CB19 Up-Flow Side Return Air Filter Adaptor (Optional) —
Field installs on either side return air opening of up-flow cabinet. Constructed of heavy gauge galvanized steel with a bakedon paint finish. Equipped with flanges for ease of duct connection. Access panel allows easy removal an replacement of
filter(s). One inch thick (25mm) frame type filter is furnished as
standard. Media is washable or vacuum cleanable oil coated
polyurethane. CB19-21 thru 41 adaptor requires one filter.
CB19-51 and CB19-65 model has two. See Specification table
for sizes. CB19-51 and CB19-65 fiberglass insulated adaptor is
shipped knocked down and must be field assembled.
{Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and according to FTC labeling regulations
{{Filters are not furnished and must be ordered extra.
*Includes additional blower motor heat capacity.
Model NumberCB19-21CB19-26CB19-31CB19-41CB19-51CB19-65
Net face area — ft.2 (m2)4.22 (0.39)4.22 (0.39)5.27 (0.49)5.27 (0.49)7.0 (0.65)7.0 (0.65)
{Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and according to FTC labeling regulations
{{Filters are not furnished and must be ordered extra.
*Includes additional blower motor heat capacity.
Number of rows333333
Fins per inch (fins per m)12 (472)12 (472)13 (512)13 (512)14 (551)14 (551)
Suct. (vapor) line conn. — in. (mm) sweat5/8 (16)5/8 (16)3/4 (19)3/4 (19)7/8 (22.2)1-1/8 (28)
Liquid line connection — in. (mm) flare3/8 (9.5)3/8 (9.5)3/8 (9.5)3/8 (9.5)3/8 (9.5)3/8 (9.5)
er and size of
ng weig
9 x 7
(229 x 178)
in.(1) 16 x 20 x 1(1) 20 x 20 x 1(1) 20 x 25 x 1
ters
mm(1) 406 x 508 x 25(1) 508 x 508 x 25(1) 508 x 635 x 25
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
Air Volume at Various Blower Speeds
HighLow
CB19-65 AND CBH19-65 BLOWER PERFORMANCE
WITH 460 VOLT (1 phase) MOTOR
External Static
Pressure
in. wg.PacfmL/scfmL/s
002380112522501060
.05122340110521801030
.10252290108021401010
.1537225010602110995
.2050219010352065975
.2562213010052015950
.307520759801970930
.4010019459201860880
.5012518208601760830
NOTE — All air data is measured external to unit.
Electric heaters have no appreciable air resistance.
For optional up-flow air filter resistance see separate table.
—5—
Air Volume at Various Blower Speeds
HighLow
ELECTRIC HEAT DATA — CB19/CBH19-21,-26
Model Number
& Shipping Weight
Steps & Phase
Input
Input
Input
Amps
(68G86)
(g)
ECB19-5
(69G87)
g
ECB19-6
(69G88)
g
ECB19-7
(69G89)
g
ECB19-8
(69G90)
g
ECB19-10
(69G91)
g
ECB19-2.5
(69G86)
g
ECB19-5
(69G87)
g
ECB19-6
(69G88)
g
ECB19-7
(69G89)
g
ECB19-8
(69G90)
g
ECB19-10
(69G91)
g
ECB19-12.5
(69G92)
g
(69G93)
(g)
Blower Coil Unit
Electric Heat Model Number
Number of
Volts
kW
**Btuh
DBlower
Circuit 1Circuit 2
ECB19-2.5
4 lbs. (2 kg)
4 lbs. (2 kg)
5 lbs. (2 kg)
CB19-21
CBH19-21
5 lbs. (2 kg)
5 lbs. (2 kg)
5 lbs. (2 kg)
4 lbs. (2 kg)
4 lbs. (2 kg)
5 lbs. (2 kg)
5 lbs. (2 kg)
CB19-26
CBH19-26
5 lbs. (2 kg)
5 lbs. (2 kg)
10 lbs. (5 kg)
ECB19-15
10 lbs. (5 kg)
*Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.
*Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.
ECB19-8
5 lbs. (2 kg)
ECB19-10
5 lbs. (2 kg)
ECB19-12.5
10 lbs. (5 kg)
ECB19-15
10 lbs. (5 kg)
ECB19-5
6 lbs. (3 kg)
ECB19-7.5
6 lbs. (3 kg)
ECB19-10
6 lbs. (3 kg)
ECB19-15
9 lbs. (4 kg)
ECB19-20
14 lbs. (6 kg)
1 step
1 phase
2 steps
1 phase
2 steps
1 phase
2 steps
1 phase
2 steps
1 phase
3 steps
1 phase
3 steps
1 phase
3 steps
3 phase
3 steps
3 phase
3 steps
3 phase
3 steps
3 phase
3 steps
1 phase
2204.214,3003.026.3- - - -
2304.615,7003.027.4- - - -
2405.017,1003.028.4- - - -
2084.515,4003.029.5- - - -
2205.017,1003.030.8- - - -
2305.518,8003.032.4- - - -
2406.020,5003.033.7- - - -
2085.317,9003.034.0- - - -
2205.920,1003.035.9- - - -
2306.421,9003.037.3- - - -
2407.023,9003.038.9- - - -
2086.020,5003.038.5- - - -
2206.722,9003.040.5- - - -
2307.325,1003.043.3- - - -
2408.027,3003.044.0- - - -
2087.525,6003.047.4- - - -
2208.428,7003.050.1- - - -
2309.231,4003.052.3- - - -
24010.034,1003.054.5- - - -
2089.432,0003.040.018.9
22010.535,8003.042.219.9
23011.539,2003.044.020.8
24012.542,6003.045.821.8
20811.338,4003.047.522.7
22012.643,0003.050.123.9
23013.547,0003.052.325.0
24015.051,2003.054.526.0
2083.812,8003.015.4- - - -
2204.214,3003.016.2- - - -
2304.615,7003.016.8- - - -
2405.017,1003.017.4- - - -
2085.619,2003.021.9- - - -
2206.321,5003.023.0- - - -
2306.923,5003.024.0- - - -
2407.525,6003.024.9- - - -
2087.525,6003.028.4- - - -
2208.428,7003.029.9- - - -
2309.231,4003.031.3- - - -
24010.034,1003.032.5- - - -
20811.338,4003.041.5- - - -
22012.643,0003.043.7- - - -
23013.547,0003.045.7- - - -
24015.051,2003.047.5- - - -
20815.051,2003.047.445.0
22016.857,3003.050.147.8
23018.462,7003.052.349.9
24020.068,2003.054.552.2
—7—
ELECTRIC HEAT DATA — CB19/CBH19-51
Unit
Model Number
p
(69G87)
g)
1step
4lbs.(2kg)
(69G88)
g)
2steps
5lbs.(2kg)
(69G89)
g)
2steps
5lbs.(2kg)
ECB19 7
3
12 lb
)
3 phase
(69G98)
g)
3steps
6lbs.(3kg)
(69G90)
g)
2steps
5lbs.(2kg)
(69G91)
g)
2steps
5lbs.(2kg)
(69G99)
g)
3steps
6lbs.(3kg)
CB1951
ECB19 10
3
12 lb
)
3 phase
(68G92)
g)
3steps
10lbs.(5kg)
(69G93)
g)
3steps
10lbs.(5kg)
(70G00)
g)
3steps
9lbs.(4kg)
5
ECB19 15
3
12 lb
)
3 phase
(69G94)
g)
4steps
14lbs.(6kg)
(70G01)
g)
6steps
19lbs.(9kg)
ECB19 20
6
18 lb
)
3 phase
(69G95)
g)
5steps
18lbs.(8kg)
Blower Coil
Model Number
CB19-51
CBH19-51
*Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.
*Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.
NOTE — When unit with optional electric heat is installed on a combustible floor,
an additive base is required. Base is optional and must be ordered extra.
When using additive base make opening in floor 2-3/8 inches (60mm)
larger (side to side) and 2-1/2 inches (64mm) larger (front to rear) than
unit supply air opening.
Model
No.
CB19-21 & -26CB19-31 & -41CB19-51 & -65
inchmminchmminchmm
A481219511295601524
B18-1/446421-1/254623-1/4591
C23-1/459123-1/459125-1/4641
D184571845720508
E15-7/840319-1/848620-7/8530
F21-7/1654521-7/1654523-7/16595
G1538118-1/446420508
H9-1/823210-3/427311-5/8295
J8-15/1622712-3/432411-7/18302
K5-1/41335-1/413310254
L7-9/161929-3/1623310-1/16256
M9-3/162332255925-7/8657
—10—
3/4
(19)
1-1/16
(27)
1-1/2 (38)
1-1/16
(27)
FILTER RAILS (2)
(Filter Not Furnished)
G
RETURN
OPENING
1-1/2 (38)
TOP VIEW
F
AIR
CB
LIQUID
AIR
FLOW
BLOWER
Supply Air
LINE
SUCTION
LINE
CONDENSATE
DRAINS (2)
ELECTRICAL
INLETS
(Both Sides)
OPTIONAL
ELECTRIC HEAT
(Field Installed)
5/8
(16)
A
1-1/16
M
(27)
H
BLOWER
Supply Air
FRONT VIEWSIDE VIEW
(76)
J
K
L
3
ED
1-1/16
(27)
DIMENSIONS — inches (mm)
*NOTE—Air flow may be
either direction.
UP-FLOW SIDE RETURN AIR FILTER ADAPTOR (CB19-21,-26,-31 and -41)
*AIR FLOW
AIR FILTER
(Furnished)
3/4
(19)
1-3/16
(30)
3/4
(19)
1
(25)
20
(508)
OPENING
SAME
BOTH SIDES
18
(457)
1
(25)
A
Model
B
1
(25)
Number
CB19-21 & 26
CB19-31 & 41
A
Inch mm
1620406
5081418
B
Inch mm
356
457
*NOTE—Air flow may be
either direction.
OPTIONAL
18
(457)
ELECTRIC HEAT
(Field Installed)
1-1/16
(27)
Supply Air
23-1/4
(591)
3/4
(19)
AIR FILTERS
(Furnished)
*AIR FLOW
FRONT VIEW
SIDE VIEW
1
(25)
UP-FLOW SIDE RETURN AIR FILTER ADAPTOR (CB19-51 and -65)
8-1/8
(206)
FRONT VIEW
3/4
(19)
2-1/2
(64)
25
(635)
OPENING
SAME
BOTH SIDES
20
(508)
SIDE VIEW
24-3/4
(629)
1
(25)
1
(25)
2-1/2
(64)
26-3/4
(679)
CBH19-21,-26,-31 and -41 HORIZONTAL MODELS
3/4 (19)
1-1/2
(38)
21-7/16
(545)
BLOWER
AIR
FLOW
D
RETURN
AIR
OPENING
1-1/2
(38)
ELECTRICAL INLETS
(Both Sides)
5/8
(16)
1-1/16
(27)
C
Supply Air
B
1-1/16
(27)
TOP VIEW
1-5/16 (33)
BLOWER
SUCTION
LINE
2-1/16
CONDENSATE
DRAINS
A
(52)
3(76)
LIQUID
LINE
(76)
2-1/16 (52)
E
3
H
J
1-5/16
(33)
G
FILTER RAILS (2)
(Filter Not Furnished)
F
NOTE — Units are shipped with left hand air
discharge. For right hand air discharge, turn
unit over (end for end) and reposition coil.