Lennox CB30M-65

Page 1
Corp. 9711–L7
CB29M
CB30M
Service Literature
ELITE 10 CB29M and ELITE 12 CB30M SERIES UNITS
INCLUDING ECB29 ELECTRIC HEAT
The Elite 10 CB29M and Elite 12 CB30M are high efficiency
blower coils. Several models are available in sizes ranging
from 1-1/2 through 5 tons (5.3 through 17.6 kW). Both the
CB29M and CB30M are multi-position (upflow, downflow
or horizontal) units. The units come with a factory
installed check and expansion valve for cooling or heat
pump applications.
CB29M series units are designed to be matched with the
10 SEER air conditioner and heat pump line, and the
CB30M series units are designed to be matched with the
12 and 13 SEER air conditioner and heat pump lines.
While these blower coil units are designed to be primarily
matched with these outdoor units, they may be matched
with other air conditioners or heat pumps as noted in the
rating information.
ECB29 electric heat, in several voltages and kW sizes, can
be field installed in the CB29M and CB30M cabinets.
Information contained in this manual is intended for use
by experienced HVAC service technicians only. All specifi-
cations are subject to change. Procedures outlined in this
manual are presented as a recommendation only and do
not supersede or replace local or state codes.
CB29M CB30M

Lennox CB30M-65 Specifications

General

Brand	Lennox
Model	CB30M-65
Category	Air Conditioner
Language	English

Summary

CB29 M Specifications

CB29 M Blower Performance Data

CB30 M Specifications

CB29 M & CB30 M Parts Arrangement

CB29 M and CB30 M Control Box

Diagram and description of the control box components and connections.

Unit Components

Control Box

Details on the control box, including line voltage and electric heat connections.

Blower Assembly

Electric Heat Data (1 Phase) - CB29 M-2126 & CB29 M-31

III-Optional ECB29 Electric Heat

B-Electric Heat Components

Description of the components within the electric heat sections.

Electric Heat Sequencer Relays

Details on sequencer relays controlling heat stages and blower operation.

Temperature Limits

Explanation of primary and secondary high temperature limits for electric heat.

Electric Heat Circuit Protection

Circuit Breakers (CB1, CB2, CB3)

Information on circuit breakers used for 208/230 volt electric heat sections.

Fuses (F3)

Details on fuses used in 460 and 575 volt electric heat sections.

IV-Configuration Modifications

Configuration Modifications

VI-Typical Operating Characteristics

C-Blower Speed Taps

Instructions for changing blower motor speed taps for desired airflow.

VII-Maintenance

VIII-Wiring Diagrams and Sequence of Operations

A-CB29 M & CB30 M - 208230 V Single Phase - Sequence of Operation

Step-by-step description of the unit's operation sequence for heating and cooling.

Wiring Diagrams and Sequence of Operations

B-CB29 M - 460 and 575 V Three Phase - Sequence of Operation

Operational sequence for 460/575V three-phase units, including heating and cooling.

C-ECB29-2.5, -5, -5 CB, -8, -8 CB - 208230 V Single Phase - Sequence of Operation

Sequence of operation for specific single-phase electric heat configurations.

D-ECB29-10, -10 CB - 208230 V Single Phase - Sequence of Operation

Sequence of operation for specific single-phase electric heat configurations.

E-ECB29-12.5 CB, -15 CB - 208230 V Single Phase - Sequence of Operation

Sequence of operation for specific single-phase electric heat configurations.

F-ECB29-20 CB - 208230 V Single Phase - Sequence of Operation

G-ECB29-25 CB, -30 CB - 208230 V Single Phase - Sequence of Operation

H-ECB29-5, -8, -10, -15 CB - 208230 V Three Phase - Sequence of Operation

I-ECB29-20 CB, -25 CB - 208230 V Three Phase - Sequence of Operation

J-ECB29-10, 15, 20, 25 - 460 V and 575 V Three Phase - Sequence of Operation