Rheem Raypak Delta Limited 399B User Manual

E󰀨ective: 03-31-21 Replaces: 10-15-18 P/N 241330 Rev. 5
WARNING: If these instructions are not followed exactly, a re or explosion may
result causing property damage, personal injury or death.
FOR YOUR SAFETY: Do not store or use gasoline or other ammable vapors and liquids or other
combustible materials in the vicinity of this or any other appliance. To do so may result in an explosion
or re.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
Installation and service must be performed by a qualied installer, service agency or the gas
supplier.
This manual should be maintained in legible condition and kept adjacent to the heater or in another safe place for
future reference.
Models 399B–2339B
Types H & WH
L
W
INSTALLATION & OPERATING
INSTRUCTIONS
APPROVED
UNCONTROLLED DOCUMENT IF PRINTED

Rheem Raypak Delta Limited 399B Specifications

General

Model Number	399B
Category	Boiler
Brand	Rheem Raypak
Series	Delta Limited
Fuel Type	Natural Gas
Input BTU	399, 000
Thermal Efficiency	80%
Vent Diameter	6 inches
Water Connection Size	2 inches

Summary

Installation and Operating Instructions

Safety Warnings and Gas Leak Procedures

Covers general safety, what to do if gas is smelled, and specific warnings.

Comprehensive Warnings

Hazard Definitions and Specific Warnings

Explains hazard terms and details critical safety warnings for installation, operation, and environmental hazards.

Before Installation Procedures

General Safety Information

Scald Hazard and Temperature Control

Discusses water temperature risks and safe settings to prevent scalding.

Installation Guidelines

Combustion and Ventilation

Potable Water and Space Heating

Gas Supply Requirements and Safety

Essential information and warnings regarding the gas supply connection and type.

Electrical Power Connections

Controller Connections and Wiring Procedures

Guidance for connecting external controllers and making primary electrical connections.

Venting Requirements

Horizontal Through-the-Wall Venting (Category III)

Installation and Termination Guidelines

Outdoor Installation Considerations

Freeze Protection and Controls

Heater Sequence of Operation

Operation Sequence for Models 399B-899B

Operation Sequence for Models 989B-2339B

Operation Sequence for Models 1529B-2339B

Ignition Module and Safety Devices

Ignition Module, High Limit, Flow Switch & Codes

Low Water Cut-Off and Pressure Switches

Function of LWCO and Gas Pressure Switches

Start-Up Procedures

Pre Start-up Checks and Tools

Essential checks, tools, and safety precautions before initial heater start-up.

Start-Up Adjustments

Blower and Main Burner Adjustments

Safety Inspection and Performance Testing

Checks, Leak Tests, Pilot & Valve Testing

Verifying performance, conducting leak tests, and testing pilot/gas valves.

Post Start-Up Checks and Safety Device Testing

Verifying system operation and testing safety controls after initial start-up.

Operation Procedures

Lighting and Shut-Down Instructions

Troubleshooting Guide

Maintenance Schedule

Suggested Minimum and Preventive Maintenance

Recommended daily, monthly, yearly, and preventive maintenance tasks.

Limited Parts Warranty

Warranty Scope, Exclusions & Claims

Start-Up Checklist