Rheem Raypak Delta Limited WH3-499B - User Manual

INSTALLATION & OPERATING
INSTRUCTIONS
CATALOG NO. 1000.60A Effective: 01-06-09 Replaces: 09-28-07 P/N 241330 Rev. 2
WARNING: If these instructions are not followed exactly, a fire or explosion may
result causing property damage, personal injury or death
.
FOR YOUR SAFETY: Do not store or use gasoline or other flammable 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 fire.
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 fire department.
Installation and service must be performed by a qualified 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

Rheem Raypak Delta Limited WH3-499B Specifications

General

Model Number	WH3-499B
Category	Boiler
Brand	Rheem Raypak
Series	Delta Limited
Fuel Type	Natural Gas
Input BTU	499, 000

Summary

General Safety Warnings

Danger, Warning, and Caution Statements

Explains hazard levels (DANGER, WARNING, CAUTION) and special notes.

Specific Safety Advisories

Covers Proposition 65, refractory ceramic fiber, and water exposure.

Before Installation

Product Receipt and Model Identification

Instructions for checking shipment, identifying the heater model, and serial number.

Ratings, Certifications, and Elevation

Details standards compliance, CSA certification, ASME code, and elevation limits.

Component Locations

Component Identification - Back View

Identifies key components visible on the back of the heater.

Component Identification - Left Side View

Identifies key components visible on the left side of the heater.

Component Identification - Front View

Identifies key components visible on the front of the heater.

General Safety Information

Scald Prevention and Temperature Limits

Discusses water temperatures, scald risks, and recommended settings.

Installation Procedures

Installation Codes and Requirements

Lists codes (NFGC, NEC, CSA) and ordinances for proper installation.

Equipment Base and Stacking

Covers mounting requirements, surface suitability, and stacking options.

Installation Clearances

Indoor Installation Clearances

Specifies minimum clearances from combustible surfaces for indoor setups.

Outdoor Installation Clearances

Details minimum clearances for outdoor installations, including overhangs.

Combustion and Ventilation Air

Indoor Unit Air Supply Requirements

Outlines requirements for combustion and ventilation air for indoor installations.

Direct-Ducted and Conventional Air Supply

Explains options for supplying combustion air via ducting or conventional means.

Water Piping and Connections

General Piping and Relief Valve Setup

Covers leak prevention, forced circulation, relief valve piping, and hydrostatic testing.

Reversing Water Connections

Step-by-step guide to changing water connections from left to right side.

Hydrostatic Test Procedure

Details how to perform a hydrostatic test on the system piping.

Hydronic Heating System Setup

Pump Selection for Hydronic Systems

Provides guidance on selecting the correct pump based on flow rates and temperature rise.

System Piping and Components

Air-Separation;Expansion Tank and Three-Way Valves

Describes the function of air separators, expansion tanks, and reasons to avoid three-way valves.

Domestic Hot Water Piping Considerations

Addresses water hardness and its impact on domestic hot water system design.

Gas Supply and Connections

Gas Supply Requirements and Connections

Details gas line sizing, regulators, sediment traps, and connection procedures.

Reversing Gas Supply Configuration

Instructions for changing the gas supply connection side.

Gas Supply Pressure Adjustments

Explains how to check and adjust gas supply and manifold pressures.

Electrical Power and Wiring

Power Source Checks and Connections

Covers checking incoming voltage, grounding, and wire sizing.

Field Wiring and Controller Connections

Guides on connecting external controllers and field wiring practices.

Venting Requirements

Flue Exhaust Tee and Appliance Categories

Explains the use of flue tees and categorizes heaters based on vent pressure and condensate.

Vent Terminal Location and Support

Details requirements for vent terminal placement, clearances, and support.

Barometric Damper Installation

Information on when a barometric damper is needed and its installation.

Venting Configurations

Natural Draft Vertical Venting (Category I)

Covers installation and termination for natural draft vertical venting systems.

Horizontal Through-the-Wall Venting (Category III)

Details installation and length limits for horizontal through-the-wall venting.

Outdoor Installation and Freeze Protection

Outdoor Installation Precautions

Advises on placement, clearances, and potential condensate issues for outdoor units.

Freeze Protection Options

Describes options to prevent freezing in outdoor installations.

System Controls and Safety Devices

Heater Control System Overview

Discusses installation, adjustment, and service of heater controls.

Safety Device Installation and Warnings

Highlights warnings related to electrical shock and control connections.

Heater Sequence of Operation

Status LED Indicators and Operation

Explains the meaning of status LEDs and the heater's operational sequence.

Key Component Operation

Ignition Module and High Limit Settings

Describes the ignition module's function, diagnostics, and manual reset high limit adjustment.

Flow Switch and Operating Controls

Details the flow switch function and types of operating controls available.

Safety Control Devices

Low Water Cut-Off Functionality

Explains how the low water cut-off device operates and prevents lockout.

Gas Pressure Switch Operation

Describes the function of low and high gas pressure switches for safety shutdowns.

Start-Up Procedures

Pre Start-up Checks and System Filling

Covers filling the system, purging air, and initial checks before starting.

Initial Start-Up Tools and Preparation

Lists necessary tools and preparation steps for initial heater startup.

Start-Up Preparation and Checks

Power Supply and Gas Pressure Verification

Details checking power supply voltage and gas supply pressure.

Blower and Burner Adjustments

Instructions for adjusting blower settings and main burner manifold pressure.

Safety Inspections and Testing

Safety Checks, Follow-Up, and Leak Testing

Covers safety control checks, post-ignition follow-up, and gas valve leak testing.

Pilot Turn-Down Test Procedure

Guides on performing the pilot turn-down test for burner section safety.

Heater Operation

Lighting Instructions and Startup

Step-by-step guide for safely lighting the heater and initiating operation.

Turning Off the Appliance

Procedures for safely shutting down the heater and turning off the gas supply.

Troubleshooting Guide

Diagnosing Operational Issues

Flowchart-based troubleshooting for common operational problems and fault diagnosis.

Maintenance Schedule

Suggested Minimum Maintenance

Outlines recommended daily, monthly, and yearly maintenance tasks for efficiency.

Preventive Maintenance Schedule

Details required preventive maintenance procedures for compliance and longevity.

Appendix: Air Contamination

Inside Air Contamination Effects

Explains how indoor air contaminants can affect the heater and cause condensation.

Limited Parts Warranty

Warranty Scope and Exclusions

Defines coverage, duration, and exclusions for Raypak's limited parts warranty.

Making a Warranty Claim

Provides instructions and contact information for initiating a warranty claim.