HomeMy WebLinkAboutCBA27UH Air HandlerAIR HANDLERS
CBA27UHE
ELITE® Series
R-410A - Upflow / Horizontal - High Efficiency Blower Motor
Bulletin No. 210675
October 2017
Supersedes April 2017
Nominal Capacity - 1.5 to 5 Tons
Optional Electric Heat - 2.5 to 25 kW
MODEL NUMBER IDENTIFICATION
CB A 27 UH E - 036 - 230 - 6 - 01
Unit Type
CB = Air Handler
Refrigerant Type
A = Aluminum Coil/R-410A
Series
Nominal Cooling Capacity - Tons
018 = 1.5 tons
024 = 2 tons
030 = 2.5 tons
036 = 3 tons
042 = 3.5 tons
048 = 4 tons
060 = 5 tons
Refrigerant Metering Device
2 = Fixed Orifice
3 = TXV - Bleedport (indoor unit)
4 = TXV - Non-bleedport (indoor unit)
5 = TXV - Non-bleedport (outdoor unit)
6 = TXV - R-410A Non-bleedport (indoor unit)
Minor Revision Number
Voltage
230 = 208/230V-1 phase-60hz
1 460 = 460V-3 phase-60hz
1 Can be used with 575V (step-down transformer required)
Configuration
UH = Upflow/Horizontal
PRODUCT SPECIFICATIONS
CBA27UHE 1.5-5 TON UPFLOW/HORIZONTAL AIR HANDLERS
Blower
E = High Efficiency Constant Torque Blower Motor
CBA27UHE / Page 2
REFRIGERANT SYSTEM
Lennox Quantum™ Coil
Enhanced aluminum alloy tube/enhanced fin coil for
superior corrosion resistance.
Lennox designed and fabricated coils.
Aluminum tubing, hairpins, distributor and header tubes.
Ripple-edged aluminum fins.
Twin coil construction assembled in a “A” configuration
for large surface area.
Provides excellent heat transfer and low air resistance
for maximum efficiency.
Precise circuiting for uniform refrigerant distribution.
Lanced fins provide maximum exposure of fin surface to
air stream.
Rifled tubing provides superior heat transfer.
Coil thoroughly factory tested under high pressure to
ensure leakproof construction.
Refrigerant Line Connections
Copper refrigerant sweat connections on both liquid and
suction lines for easy brazing.
Lines extend outside of the cabinet for ease of
connection.
See dimension drawings for locations.
Check and Expansion Valve Furnished
For use with R-410A systems.
Wide range valve with Chatleff
style fitting.
Factory installed on all models, internal to cabinet.
B
C
D
FEATURES
WARRANTY
All covered components - five years in residential
applications, one year in non-residential applications
Refer to Lennox Limited Warranty Certificate included
with each unit for additional details.
APPROVALS
Tested with matching air conditioners and heat pump
units in the Lennox Research Laboratory environmental
test room in accordance with AHRI Standard 210/240.
Optional electric heaters are rated in accordance with
US Department of Energy (DOE) test procedures and
Federal Trade Commission (FTC) labeling regulations.
Blower performance data according to unit tests
conducted in Lennox air test chamber.
Air handlers are UL Listed to US and Canadian
safety standards and components within are bonded
for grounding to meet safety standards for servicing
required by CEC and NEC.
Air handler units are approved for installation in
manufactured housing and mobile homes.
ISO 9001 Registered Manufacturing Quality System.
APPLICATIONS
1.5 to 5 ton nominal sizes.
Upflow or horizontal applications. Downflow applications
with optional conversion kit.
Applicable to expansion valve systems in cooling
applications and check and expansion valve systems in
heat pump applications.
Wide-range check and expansion valve is factory
installed.
See bulletins in section Air Conditioners for cooling
capacities.
See bulletins in section Heat Pump Outdoor Units for
cooling and heating capacities.
Optional field installed electric heaters available in
several sizes for additive heating capacity.
A
B
C
E
D
F
G
I
H
CONTENTS
Blower Data .................................................................8
Dimensions ................................................................21
Electrical Data..............................................................6
Electric Heat Data ......................................................10
Features.......................................................................2
Installation Clearances With Electric Heat ..................5
Model Number Identification ........................................1
Optional Accessories ...................................................6
Replacement Circuit Breakers ....................................9
Specifications...............................................................6
CBA27UHE / Page 3
FEATURES
BLOWER
Power Saver™ Constant Torque Blower Motor
Programmable high efficiency multi-speed blower motor.
By maintaining constant torque output, blower motor
can deliver more uniform (but
not constant) airflow over the
static pressure range.
Programmable multi-speed
operation is achieved by the
use of an ECM (Electronically
Commutated Motor) motor.
Leadless blower motor features simple plug-in
connections.
Choice of blower speeds is available. See Blower Data
tables.
Blower speed change is easily accomplished by a
simple wiring change.
Blower Assembly
Lennox designed and built, direct drive blower.
Each blower is statically and dynamically balanced as
an assembly before installation in the unit.
Blower motor is resiliently mounted to blower assembly.
Blower slides out of cabinet for servicing.
CABINET
Constructed of heavy-gauge galvanized steel.
Completely insulated with thick fiberglass insulation.
Pre-painted steel cabinets have mildly textured enamel
finish with primer coat on unpainted side of all panels.
Units are shipped in one piece but may be
disassembled into two separate sections for ease
of installation in tight applications. See dimension
drawings.
Thick rubber gasket between sections of the two piece
cabinets provides an air tight seal.
No external screw heads on sides of cabinet for tight
installations without damage to walls or woodwork.
Removable panels provide complete service access.
Electrical inlets provided in sides and top of cabinet.
See dimension drawings for locations.
Low Leakage Cabinet
All models have less than 2% air leakage and meet
ANSI/ASHRAE Standard 193-2010 “Method of Test for
Determining the Air Tightness of HVAC Equipment”.
Upflow/Horizontal Capability (Optional Downflow)
Shipped for upflow and horizontal left-hand discharge.
May be field converted to horizontal right-hand air
discharge by repositioning horizontal drain pan.
Optional downflow kit available for field conversion.
E
F
G
Dual Position Drain Pans
Drain pans designed for upflow, downflow or horizontal
applications.
Deep, corrosion resistant plastic drain pans have dual
pipe drains.
See dimension drawings.
Optional Accessories
Downflow Combustible Flooring Floor Base
Base is required for models with electric heat installed in
downflow position on combustible floors.
Downflow Conversion Kit
Required for field conversion to downflow position. Kit
consists of drip shields and 2 brackets for repositioning
coil and drain pan. See Specifications table.
Horizontal Support Frame Kit
Provides support of unit in horizontal applications.
Consists of (2) 1 x 1-1/2 x 32-5/8 in. and (2) 1 x 3 x
53-7/8 in. painted heavy gauge cold rolled steel support
channels with assembly and suspending holes.
Bolts and nuts furnished for field assembly.
Suspending rods must be field provided.
Side Return Unit Stand (Upflow Only)
Raises unit 16 in. above floor for side return air duct
connection.
Eliminates need for wooden platform construction.
All aluminum construction.
Two adjustable frames fit -018/024 thru -060 models.
Wall Hanging Bracket Kit (Upflow Only)
Allows unit to be hung on wall at any height.
Consists of heavy-gauge steel support brackets (one for
air handler, one for wall mount).
Screws furnished for fastening one bracket to unit.
Bolts for fastening one bracket to wall are field provided.
High Performance Economizer
(Commercial Applications Only)
Designed for applications requiring outdoor air to be
utilized in a commercial HVAC system. Allows the
entry of fresh outdoor air for free cooling, reducing the
requirement for mechanical cooling.
Heavy gauge galvanized steel cabinet lined with thick
fiberglass insulation.
Mixed air sensor, outdoor air sensor and 24VAC
transformer furnished.
Approved for California Title 24 building standards.
ASHRAE 90.1-2010 compliant.
See separate Product Specifications bulletin for additional
information and available control and sensor options.