Rheem Raypak Delta Limited WH3-649B 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 WH3-649B Specifications

General

Category	Boiler
Model	WH3-649B
Series	Delta Limited
Fuel Type	Natural Gas
Brand	Rheem
Input BTU	649, 000 BTU/hr

Summary

WARNINGS

BEFORE INSTALLATION

Product Receipt

Procedures for checking and reporting damage upon heater receipt.

Model Identification

How to locate and interpret the heater's model and serial number.

Ratings and Certifications

Information on standards and certifications the heater complies with.

Installations at Elevation

Guidelines for installing the heater at different altitudes.

Component Locations

General Information

GENERAL SAFETY

INSTALLATION

Installation Codes

Lists codes and standards that must be followed during installation.

Equipment Base

Requirements for the mounting surface and location of the heater.

Stacking

Information on stacking units using an optional kit.

Clearances

Indoor Installations

Minimum and recommended service clearances for indoor installations.

Outdoor Installations

Minimum and recommended service clearances for outdoor installations.

Combustion and Ventilation Air

Indoor Units

Requirements for combustion and ventilation air for indoor installations.

U.S. Installations

Specific requirements for combustion air supply in US installations.

All Air from Outdoors

Canadian Installations

Water Piping

General

General guidelines for water piping installation to prevent damage.

Reversing Water Connections

Instructions for changing water connections from left to right side.

Relief Valve Piping

Safety warnings for pressure relief valve discharge piping.

Hydrostatic Test

Procedures for hydrostatic testing of the system piping.

Cold Water Operation

Cold Water Starts

Addresses issues with frequent cold water starts and protection methods.

Cold Water Run

Hydronic Heating

Pump Selection

Guidance on selecting the correct pump for hydronic heating systems.

Pressure Drop in Feet of Head Feedwater Regulator

Piping

Air-Separation/Expansion Tank

Three-Way Valves

Domestic Hot Water

Potable Water and Space Heating

Gas Supply

Reversing Gas Supply Connection

Gas Supply Pressure

Electrical Power Connections

Field Wiring Connection

Venting

Vent Terminal Location

Changing the Flue Outlet

Venting Installation Tips

Venting Configurations

Common Venting System

Procedures for safely managing common venting systems.

Vertical Venting

Guidelines for Category I vertical venting installations.

Horizontal Through-the-Wall Venting (Category III)

Termination

Outdoor Installation

Heater Sequence of Operation

Safety and Control Components

Ignition Module

Description and diagnostic codes for the ignition module.

High Limit (Manual Reset)

Information on the manual reset high limit temperature device.

Flow Switch

Function of the flow switch in safety and control.

Operating Control

General information on different types of operating controls.

Low Water Cut-Off (Optional)

High and Low Gas Pressure Switches

START-UP

Blower Adjustment

Main Burner Adjustment

Safety Inspection

Post Start-Up Check

OPERATION

TROUBLESHOOTING

MAINTENANCE

Weekly

Routine checks to be performed on a weekly basis.

Monthly

Maintenance tasks to be performed monthly.

Semi-Annually

Maintenance tasks to be performed semi-annually.

Annually

Maintenance tasks to be performed annually.

As Required

Maintenance tasks to be performed as needed based on specific conditions.

APPENDIX

LIMITED PARTS WARRANTY

START-UP CHECKLIST