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INSTALLATION INSTRUCTIONS
FRONT RETURN AIR HANDLERS
EARTH-FRIENDLY R-410A REFRIGERANT:
RHBL High Efficiency
RHAL Standard Efficiency
WARNING
LWARNING
These instructions are intended as an aid to qualified licensed
service personnel for proper installation, adjustment and
operation of this unit. Read these instructions thoroughly before
attempting installation or operation. Failure to follow these
instructions may result in improper installation, adjustment,
service or maintenance possibly resulting in fire, electrical
shock, property damage, personal injury or death.
e f r i g e r a n t
ISO 9001:2008
92-20521-56-08
SUPERSEDES 92-20521-56-07
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Table of Contents
Related Manuals for Rheem RHAL Series
Summarization of Contents
General Safety Information
Electrical and Installation Hazards
Warnings on electrical shock, proper personnel, and duct leak dangers.
Housing and Ductwork Safety
Safety notes for manufactured housing, grounding, circuit breakers, and duct connections.
Product Specific Safety Warnings
Proposition 65 and Health Risks
Warnings about fiberglass insulation and other potential chemical hazards.
Operational Safety Precautions
Cautions regarding motor screws, filters, ductwork materials, and drain pans.
General Information and Air Quality
Efficiency and Indoor Air Quality
Discusses duct systems' impact on efficiency and indoor air quality.
Receiving and Clearances
Unit Receiving and Inspection
Procedures for inspecting units for transit damage and verifying specifications.
Installation Clearance Requirements
Details required clearances for combustible materials and service access.
Model Number Explanation
RHAL Model Identification
Breakdown of RHAL model number components and their meanings.
RHBL Model Identification
Breakdown of RHBL model number components and their meanings.
Available Unit Models
J Voltage Model Listings
Lists available air handler models at J voltage with important notes.
Unit Dimensions and Weights
Dimensional Data Table
Table showing physical dimensions and weight for various models.
Applications and Mounting
Vertical Upflow Configuration
Describes the standard vertical upflow configuration for all models.
Wall Mount Installation Procedure
Details the procedure for wall mounting the air handler.
Mounting Options
Frame Mount Installation Procedure
Explains how to mount the air handler within a frame structure.
Electrical Wiring Overview
Power Wiring Requirements
Outlines requirements for power supply and branch circuit disconnects.
Wiring, Control, and Grounding
Control Wiring Guidelines
Specifies requirements for low voltage control wiring separation and installation.
Grounding Requirements
Details the necessity and methods for grounding the unit.
Electrical Data Tables
Blower Motor Electrical Data
Provides electrical specifications for blower motors without electric heat.
Electric Heat Electrical Data
Lists electrical data for heater kits for RHAL/RHBL models.
Heater Kit Supplemental Information
Heater Kit Specifications
Contains supplemental information and ratings for heater kits.
Airflow Performance Basics
Airflow Operating Limits
Defines minimum and maximum airflow limits for various operating conditions.
RHAL Airflow Performance
240V PSC Motor Airflow Data
Presents airflow data for RHAL models with PSC motors at 240V.
RHBL Airflow Performance
208/240V Constant Torque Airflow Data
Provides airflow data for RHBL models with constant torque motors.
Ductwork, Refrigerant, and Drains
Ductwork Installation Guidelines
Details compliance with codes and design considerations for ductwork.
Refrigerant Connection Procedures
Instructions for connecting refrigerant lines to the coil.
Condensate Drain Tubing Installation
Guidelines for installing condensate drain tubing and fittings.
Air Filter Requirements
Filter Placement and Maintenance
Discusses the importance of air filter placement and maintenance for system performance.
System Charging Procedures
Orifice Size Selection Guide
Guide to selecting the correct orifice size based on outdoor unit and SEER rating.
Heating Mode Charging Charts
Provides charging charts for heating mode based on indoor temperature.
Sequence of Operation
Cooling and Heat Pump Operation
Describes the sequence for cooling and heat pump heating operation.
Electric Heat Operation Sequence
Explains the sequence for heating operation using electric heat.
Operational Sequences and Calculations
Blower Delay and Emergency Heat
Explains blower time delay and emergency heat mode operation.
Temperature Rise and BTUH Calculations
Formulas for calculating temperature rise and BTUH heating capacity.
Performance Calculations and Pre-Start
Airflow CFM and Correction Factor
Formulas for calculating airflow CFM and correction factors.
Pre-Start Installation Checklist
A checklist to ensure proper installation before starting the unit.
Maintenance Procedures
Air Filter and Coil Maintenance
Procedures for maintaining air filters, indoor coils, drain pans, and lines.
Blower Motor and Assembly Servicing
Guidance on inspecting, cleaning, and removing blower motor and assembly.
Blower Motor Removal Procedures
14.6 Blower Motor Removal (Large Cabinet)
Detailed procedure for removing the blower motor from large cabinet models.
Blower Assembly Removal Procedures
14.7 Small Cabinet Blower Assembly Removal
Procedure for removing the blower assembly from small cabinet models.
Blower Assembly Removal Procedures
14.8 Large Cabinet Blower Assembly Removal
Detailed procedure for removing the blower assembly from large cabinet models.
Parts and Accessories
Replacement Parts Information
Information on ordering replacement parts and specifications.
Available Accessories and Kits
Details available accessories and kits for the air handler.
Accessory Kits
Bottom Return Conversion Kit
Describes the kit to divert return air from front to bottom.
Louvered Cabinet Grill
Explains the decorative grill that covers the front return opening.
Decorative Wall Grills
Wall Grill Installation Options
Describes decorative grills for closet or interior wall installations.
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