Rheem RBHM-Series Air Handlers and Fan Coil Units

Product Overview

The Rheem RBHM-Series Air Handlers and Fan Coil Units are designed for efficient and reliable HVAC performance. These units utilize R-410A earth-friendly refrigerant and are built with robust construction for durability and quiet operation.

Key Features

• Versatile 3-way convertible design for upflow, horizontal left, and horizontal right airflow configurations.
• Available from the factory in upflow and horizontal left configurations.
• Nominal airflow up to 1.0" external static pressure.
• Standard factory-installed high-efficiency coils.
• Sturdy double-wall construction with 0.5 inch (12.7 mm) of foil-faced insulation for excellent sound and insulating characteristics.
• Designed for use with exterior high-static filters.
• Circuit breaker (standard on units with more than 11 kW) meets U.L. and cUL requirements for service disconnect.
• Factory-installed electric heat provides precise heat for indoor comfort across various applications.
• Dip switch settings allow for selectable, customized cooling airflow for diverse applications.
• On-demand dehumidification terminal adjusts airflow to help control humidity for enhanced comfort in cooling mode.

The units are certified under the A.R.I. Certification Program (A.R.I. Standards 210/240-84). Certifications include Pro-Ozone and ISO 9002. The product is cULus Listed.

Engineering Features

Advanced Technology and Design

• Quiet, energy-efficient ECM motor technology provides nominal airflow up to 1.0 inch (25 kPa) of external static pressure.
• An interface board with conveniently located dip switches in the blower compartment allows for precise, field-selectable airflow adjustments.
• Selectable continuous fan "on" options are available.
• Attractive pre-painted cabinet exterior.
• Rugged double-wall steel cabinet construction offers added strength and versatility.
• 0.5" foil-faced insulation is mechanically retained in the blower compartment.
• Features a four-leg, rubber-insulated wire motor mount.
• Circuit breakers are standard on 1-phase models above 11 kW and optional on models with 11 kW or less.
• Models supplied with circuit breakers meet UL and CUL requirements as a service disconnect switch.
• Provisions for field electrical connections are available from either side of the air handler cabinet.
• The tab-lock blower housing integrates electric heaters, controls, motor, and blower, with a slide-out design for convenient service and maintenance.
• Exclusive dependable Incoloy sheath type electric heating elements are located in the blower housing to provide mixed warm air.
• Field convertible for vertical upflow, horizontal left-hand, or right-hand air supply.
• Indoor coil design offers low air-side pressure drop, high performance, and an extremely compact size. All coils include a PVC condensate elbow as standard.
• All indoor coils feature copper tubing and aluminum fins.
• A molded polymer corrosion-resistant condensate drain pan is provided on all indoor coils.
• Both supply and return duct flanges are provided as standard on the air handler cabinet.
• Connection points for both high voltage and low voltage control wiring are located inside the air handler cabinet.
• Concentric knockouts are provided for power connection to the cabinet. Installers can pull a hole size up to 2 inches (51 mm) for 1.5-inch (38 mm) conduit.
• Front refrigerant and drain connections are standard.

Model Identification

Understanding Model Configurations

The model number provides key information about the unit's specifications:

Notes:

• RBHM Air Handler cannot be ordered without a coil.
• Electrical heat designation: refer to electric heat data for actual heater kW represented by the number above.
• Electric heater BTUH = (heater watts + motor watts) x 3.412 (See airflow table for motor watts).
• Air Handlers with A-Coils do not come with a factory-installed air filter. An external filter rack or other means of filtration is required.

[ ] Designates Metric Conversions.

Physical Specifications

Unit Dimensions

Diagrams illustrate the physical layout, including duct flange locations, electrical connection knockouts (high and low voltage), and drain connections. Units can be configured for upflow, horizontal left, or horizontal right airflow.

Front View Diagram Description: Shows the front of the unit with airflow direction indicated. Features include primary and secondary NPT drain connections, and supply/return duct openings with flanges.

Side View Diagram Description: Shows the side of the unit, indicating liquid and suction line connections, and horizontal drain knockouts.

[ ] Designates Metric Conversions.

Performance Data

Airflow Performance

Airflow performance data is based on cooling performance with a dry coil and filter in place. Select the performance table for the appropriate unit size, voltage, and number of electric heaters to be used. Ensure the external static applied to the unit allows operation within the minimum and maximum limits shown in the table below for both cooling and electric heat operation. For optimum blower performance, operate the unit within the 0.2" to 0.5" in. W.C. external static range. In general, the indoor motor speed tap should be set as shown in the table for the appropriate cooling capacity. Always verify the proper motor speed tap is connected, as units are shipped from the factory connected for high-speed operation.

IMPORTANT: Observe airflow operating limits. Do not operate above 1.0 in. W.C. system external static.

[ ] Designates Metric Conversions.

Electrical Specifications

Blower Motor Electrical Data

Electric Heat Electrical Data

*Unit shipped from factory wired for single supply circuit. Unit may be field converted to multiple supply circuit.

[ ] Designates Metric Conversions.

Copper Wire Size (3% Voltage Drop)

SUPPLY CIRCUIT AMPACITY NOTE: Wire based on copper conductors 75°C minimum rating. For more than 3 conductors in a raceway or cable, see N.E.C. for derating the ampacity of each conductor.

Accessories

Filter Bases

[ ] Designates Metric Conversions.

Warranty and Installation Information

Limited Warranty

Rheem will furnish a replacement for any part of this product that fails in normal use and service within the applicable periods stated, in accordance with the terms of the limited warranty. Rheem Prestige Series® equipment features a 10-year limited parts warranty.* This 10-year limited parts warranty is applicable only to single-phase products installed in residential applications. For complete details of the limited warranty, including applicable terms and conditions, consult your local installer or contact the manufacturer for a copy.

Installation Guidance

Before proceeding with installation, refer to the installation instructions packaged with each model, and comply with all Federal, State, Provincial, and Local codes, regulations, and practices.

Rheem Air Conditioning Division, 5600 Old Greenwood Road, Fort Smith, Arkansas 72908.

"In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice."