Rheem RHPL-HM2421JC User Manual

92-20521-45-05
SUPERSEDES 92-20521-45-04
INSTALLATION INSTRUCTIONS
AIR HANDLERS
RHPL Premium High Efficiency
Equipped With The Comfort Control
2
System™
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

Rheem RHPL-HM2421JC Specifications

General

Brand	Rheem
Model	RHPL-HM2421JC
Type	Air Handler
Airflow	800 CFM
Refrigerant	R-410A
Weight	120 lbs
Voltage	208/230V
Phase	1
Minimum Circuit Ampacity	15 A
Fan Motor Type	PSC
Shipping Weight	135 lbs
Cooling Capacity	2 Tons
Width	21"
Depth	21 inches

Summary

Receiving Equipment

Clearances

Electrical Wiring

Power Wiring

Details requirements for connecting electrical power to the unit.

Grounding

Explains permanent grounding requirements for safety.

Electric Heat Electrical Data

Comfort Control System Interface Board

Comfort Control² Control Wiring

Details the four control wires required for Comfort Control² operation.

Comfort Control² System Control Board

Features of the RHPL series air handler control board.

Airflow Adjustments with Comfort Control² System™™

Cooling Airflow Settings by Tonnage

Details cooling airflow settings based on heat pump tonnage.

Cooling Airflow Adjustment

How to adjust cooling airflow using Comfort Control² thermostat/tool.

Heating Airflow Adjustment

How to adjust heating airflow using Comfort Control² thermostat/tool.

Electric Heat Airflow

Provides airflow data for electric heat applications.

Cooling Mode Dehumidification

Conventional Thermostat Wiring

Conventional 24VAC Thermostat Control Wiring

Details wiring requirements for conventional 24VAC thermostats.

Cooling Airflow Settings

Cooling Airflow Adjustments with Single Stage Condensing Units

Heating Airflow Adjustment

Airflow Adjustment (Trim)

Electric Heat Airflow

Cooling Mode Dehumidification (ODD)

Air Handler Diagnostic Codes

Ductwork

Refrigerant Connections

TEV Sensing Bulb

Condensate Drain Tubing

Guidelines for drain line installation, pitching, and traps.

Airflow Performance

Airflow Performance Data

Sequence of Operation

Cooling Sequence

Heating Sequence

Calculations

Calculating Temperature Rise

Calculating BTUH Heating Capacity

Calculating Airflow CFM

Calculating Correction Factor

Pre-Start Checklist

Maintenance

Air Filter Maintenance

Indoor Coil, Drain Pan, and Drain Line Maintenance

Comfort Control² System Board Replacement

Procedure for replacing the Comfort Control² system board.

Blower Motor and Wheel Maintenance

Blower Assembly Removal and Replacement

Step-by-step guide for removing and replacing the blower assembly.

Motor Replacement

Procedure for removing and replacing the indoor blower motor.

ECM Control Module Replacement

Guidance on replacing the ECM control module.

Blower Wheel Replacement

Replacement Parts

Air Handler Wiring Diagrams