Lennox CB19-21

CB19/
CBH19
Bulletin #210056

ENGINEERING DATA
COILS – BLOWER COIL UNITS
January 1995
Supersedes
April 1994
CB19 AND CBH19 SERIES
UP-FLOW, DOWN-FLOW AND HORIZONTAL
BLOWER COIL UNITS
*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
Applications — The CB19 and CBH19 blower coil units are de-
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 applica-
tions. 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 dis-
charge air applications. Units are shipped for up-flow ap-
plications and may easily be field converted to the down-
flow 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 install-
er. An optional side return air adapter with filter(s) is avail-
able 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 ap-
plications. 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 sec-
tion 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.
CB19 MODEL — UP-FLO CB19 MODEL — DOWN-FLO
CBH19 MODEL — HORIZONTAL
Down-Flow Installation
Typical Applications
Up-Flow Installation
with optional electronic air cleaner
Horizontal Installation
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.
1995 Lennox Industries Inc.

Lennox CB19-21 Specifications

General

Brand	Lennox
Model	CB19-21
Category	Air Handlers
Language	English

Summary

CB19 and CBH19 Series Blower Coil Units

Applications Overview

Details the multi-position installation and system applicability of CB19 and CBH19 blower coil units.

CB19 Model Configuration and Features

Explains CB19 unit's up-flow/down-flow capabilities and field conversion options.

CBH19 Model Configuration and Features

Describes CBH19 horizontal discharge applications and cabinet design.

Typical Installation Views

Illustrates typical up-flow, down-flow, and horizontal installation configurations.

Blower Coil Unit Features

Unit Construction and Testing

Covers unit testing, cabinet construction, drain pan, refrigerant connections, and electrical components.

Blower and Coil System Details

Details the direct drive blower, evaporator coil design, and transformer/cooling relay features.

Optional Accessory Introduction

Introduces various optional accessories available for enhanced unit functionality.

CB19 Up-FlowDown-Flow Specifications

Coil and Blower Specifications

Provides dimensions, line connections, and blower specs for CB19 up-flow/down-flow models.

Electrical and Shipping Data

Details electrical characteristics and shipping weights for CB19 units.

Electric Heat Capacity Options

Lists Btuh output and A.F.U.E. for various optional electric heat accessory models.

CBH19 Horizontal Specifications

Horizontal Coil and Blower Specs

Details coil dimensions, refrigerant lines, and blower specs for CBH19 horizontal models.

Horizontal Unit Electrical and Weight

Presents electrical characteristics and shipping weights for CBH19 horizontal units.

Horizontal Electric Heat Capacity

Lists Btuh output and A.F.U.E. for electric heat accessories for CBH19 units.

Blower Performance Data

Model-Specific Blower Performance

Provides air volume data for various models at different static pressures and blower speeds.

Up-Flow Filter Adaptor Resistance

Details air resistance for the up-flow side return air filter adaptor at various air volumes.

Electric Heat Data for CB19 CBH19-21,-26

Electric Heat Model Specifications

Details kW, Btuh, blower amps, and minimum circuit ampacity for electric heaters.

Circuit Ampacity Requirements

Lists minimum circuit ampacity for blower motor and electric heat circuits.

Electric Heat Data for CB19 CBH19-31,-41

Single-Phase Electric Heat Specs

Details kW, Btuh, amps, and circuit ampacity for single-phase electric heat accessories.

Three-Phase Electric Heat Specs

Lists kW, Btuh, amps, and circuit ampacity for three-phase electric heat accessories.

Electric Heat Data for CB19 CBH19-51

CB19 CBH19-51 Single-Phase Heat

Electric heat specifications for CB19/CBH19-51 units with single-phase power.

CB19 CBH19-51 Three-Phase Heat

Electric heat specifications for CB19/CBH19-51 units with three-phase power.

Electric Heat Data for CB19 CBH19-65

CB19 CBH19-65 Single-Phase Heat

Electric heat specifications for CB19/CBH19-65 units with single-phase power.

CB19 CBH19-65 Three-Phase Heat

Electric heat specifications for CB19/CBH19-65 units with three-phase power.

Unit Dimensions and Configurations

CB19 Up-Flow Position Dimensions

Provides detailed dimensions and diagrams for CB19 units in the up-flow configuration.

CB19 Down-Flow Position Dimensions

Presents detailed dimensions and diagrams for CB19 units in the down-flow configuration.

Dimensional Details and Adaptors

Up-Flow Filter Adaptor Dimensions

Shows dimensions for the up-flow side return air filter adaptor for CB19 models.

CBH19 Horizontal Model Dimensions

Provides dimensions and diagrams for CBH19 horizontal units.

Further Dimensional Data and Clearances

Blower and Coil Section Dimensions

Details dimensions for B19/B19-65 blower and CH19-51/CH19-65 coil sections.

Horizontal CBH19-51-65 Dimensions

Provides dimensions for CBH19-51 and CBH19-65 horizontal models.

Installation Clearances

Specifies required clearances for the installation of all blower coil unit models.