Rheem RHLL-HM4821JA User Manual

92-20521-32-15
SUPERSEDES 92-20521-32-14
WARNING
▲WARNING
!
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.
ISO 9001:2008
AIR HANDLERS
FEATURING INDUSTRY STANDARD R-410A REFRIGERANT:
RHLL High Efficiency
RHSL Standard Efficiency
INSTALLATION INSTRUCTIONS
refrigerant

Rheem RHLL-HM4821JA Specifications

General

Brand	Rheem
Model	RHLL-HM4821JA
Type	Air Handler
Refrigerant	R-410A
Voltage	208/230V
Phase	1
Cooling Capacity	48, 000 BTU/h
Motor Type	ECM

Summary

Safety Information

General Safety Warnings and Symbols

Understand safety symbols and warnings for safe operation and maintenance.

Electrical Wiring and Data

4.1 Power Wiring

Guidelines for proper power supply wiring, disconnects, and conductors.

4.2 Control Wiring

Instructions for low voltage control wiring, separation from power wiring.

4.3 Grounding

Mandatory grounding procedures to prevent electrical shock hazards.

4.4 Electrical Wiring and Grounding Details

Further details on field wiring compliance and grounding requirements.

4.5 Blower Motor Electrical Data

Electrical specifications for blower motors without electric heat.

4.6 Electric Heat Electrical Data

Electrical data for various electric heater kits and configurations.

4.6C Heater Kit Supplemental Information

Information on using standard circuit breakers with approved heater kits.

Airflow Performance Data

5.1 Airflow Operating Limits

5.2 240V Airflow Performance (PSC Motor)

5.3 115/208/480V Airflow Performance (PSC Motor)

5.4 115/208/240/480V Airflow Performance (X-13 Motor)

Ductwork and Refrigerant Connections

6.0 Ductwork

7.0 Refrigerant Connections

Procedures for making refrigerant line connections and system evacuation.

Sequence of Operation

9.1 Cooling Operation

9.2 Electric Heat Operation

9.3 Heat Pump Operation

Performance Calculations

10.1 Calculating Temperature Rise

10.2 Calculating BTUH Heating Capacity

10.3 Calculating Airflow CFM

Pre-Start Checklist

Installation and Safety Pre-Operation Checks

A comprehensive checklist to ensure proper installation and safety before operation.

Maintenance Procedures

12.2 Coil, Drain Pan, and Drain Line Maintenance

12.3 Blower Motor and Wheel Maintenance

12.5 Blower Assembly Removal and Replacement

Steps for removing and replacing the blower assembly.

12.6 Motor Replacement

Procedures for removing and replacing the indoor blower motor.

12.7 Blower Wheel Replacement

Procedures for removing and replacing the blower wheel.