Nortek B64BM Series User Manual

AIR HANDLER
B64BM SERIES
INSTALLATION INSTRUCTIONS
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer. This includes being
able to install the product according to strict safety guidelines and instructing the customer on
how to operate and maintain the equipment for the life of the product. Safety should always be
the deciding factor when installing this product and using common sense plays an important
role as well. Pay attention to all safety warnings and any other special notes highlighted in the
manual. Improper installation of the furnace or failure to follow safety warnings could result in
serious injury, death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the proper
installation of this appliance. Some local codes require licensed installation/service personnel
for this type of equipment. Please read all instructions carefully before starting the installation.
Return these instructions to the customer’s package for future reference.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

Nortek B64BM Series Specifications

General

Model	B64BM Series
Hertz	60 Hz
Dimensions (H x W x D)	Varies by model
Weight	Varies by model
Voltage	208-230V
Phase	Single
Cooling Capacity	24, 000 - 60, 000 BTU/H
Airflow	Up to 2000 CFM
Motor Type	ECM

Summary

Installation Instructions

Important Safety Information

Requirements & Codes

General Information

Pre-Installation Checks

Essential checks and preparations before installing the unit.

Unit Placement Guidelines

Recommendations for locating the air handler and minimum clearances.

Specific Installation Locations

Requirements for installation in garages and considerations for plenums/ducts.

Air Handler Installation

Packaging and Handling

Instructions for safely removing the unit from its packaging.

Mounting Configurations

Details on upflow, downflow, and horizontal mounting applications.

Upflow Installation Procedures

Specific steps for installing the unit in an upflow configuration.

Downflow Installation Procedures

Steps for installing the unit in a downflow configuration.

Horizontal Installation Overview

Guidelines for installing the unit in horizontal orientations.

Air Handler Installation (Continued)

Horizontal Left Installation

Specific steps for horizontal installations with leftward airflow.

Horizontal Right Installation

Specific steps for horizontal installations with rightward airflow.

Air Handler Installation (Continued)

Circuit Breaker Cover Installation

Procedure for installing the circuit breaker cover.

Refrigerant Line Connections

Orifice Management

Steps for removing and installing the unit's orifice.

Refrigerant Line Connections (Continued)

Lineset Connection

Detailed instructions for connecting refrigerant linesets and relevant notes.

Condensate Drainage

Electrical Connections

Pre-Connection Checklist

Checklist of essential electrical checks before unit startup.

Voltage and Grounding

Guidelines for line voltage supply, polarity, and proper unit grounding.

Thermostat and Control Wiring

Instructions for thermostat and control board connections.

Twinning and Accessories

Wiring for twinning units and electronic air cleaners.

Electrical Connections (Continued)

Heater Kit Integration

Installation instructions for field-installed electric heater kits.

Startup & Adjustments

Pre-Startup Procedures

Essential inspections and initial setup before operating the unit.

Blower and System Operation

Verifying air circulation, cooling, and heating modes.

Airflow and Capacity Settings

Configuring blower speeds, electric heat airflow, and system capacity.

Startup & Adjustments (Continued)

3-Speed Unit Configuration

Details on configuring the 3-speed blower motor.

Troubleshooting

Basic Operational Checks

Verifying power, thermostat, disconnects, and component status.

Fault Diagnosis

Using control board LEDs and filters for fault identification.

Unit Maintenance

Filter and Blower Maintenance

Recommended maintenance for air filters and blower compartments.

Unit Maintenance (Continued)

Fan Wheel and Motor Inspection

Inspecting blower fan wheel and motor assembly for issues.

Refrigerant Charging

Electrical Data & Diagrams

Wiring Diagram

Installation Checklist