Raypak HI DELTA 302B User Manual

INSTALLATION & OPERATING
INSTRUCTIONS
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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.
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Models 302B –902B
Types H, WH & P
L
W

Raypak HI DELTA 302B Specifications

General

Model	HI DELTA 302B
Category	Boiler
Input BTU/hr	300, 000
Output BTU/hr	255, 000
Thermal Efficiency	85%
Fuel Type	Natural Gas
Voltage	120V
Water Connection Size	2 inches
Gas Connection Size	3/4" NPT

Summary

INSTALLATION & OPERATING INSTRUCTIONS

Models 302B-902B Types H, WH & P

Identifies the product models and types covered by the manual.

WARNINGS

Pay Attention to These Terms

Defines hazard terms: DANGER, WARNING, CAUTION, and NOTE.

California Proposition 65 Warning

BEFORE INSTALLATION

GENERAL SAFETY

Scald Hazard and Prevention

Information on water temperature hazards and prevention measures.

Time/Temperature Scald Chart

Chart detailing scald injury time vs. water temperature.

INSTALLATION

Installation Codes

Lists codes that must be followed for installation.

Gas Supply

Gas Supply Connection and Pressure

Instructions for connecting gas supply and pressure requirements.

Electrical Power Connections

Codes and Wiring Details

Lists electrical installation codes and wiring details.

Heater Wiring Configurations

ON/OFF and 2-Stage Wiring

Description of ON/OFF and 2-stage wiring configurations.

Controls

Safety Warnings for Controls

Safety warnings regarding controls installation and service.

Heater Sequence of Operation

Models 302B-902B Operation Steps

Step-by-step operation for specific models.

Controller Connection Instructions

Ignition Module

Operation and Diagnostic Codes

Ignition module operation and diagnostic LED codes.

Safety Controls

High Limit, Low Water Cut-Off, and Flow Switch

Descriptions of key safety controls.

High and Low Gas Pressure Switches

Descriptions of gas pressure switches.

UDB Diagnostic Board and Fault History

Accessing and Clearing Faults

Procedures for managing UDB diagnostic faults.

UDB Fault Messages

Table R: UDB Fault Messages

Table detailing UDB fault messages and their causes.

Wiring Diagram

Electrical Wiring Diagram

Diagram showing the electrical wiring of the unit.

START-UP

Pre Start-up Procedures and Checks

Steps before initial start-up and required checks.

Initial Start-up and Tools Needed

Initial start-up process and list of required tools.

Preparation and Gas Supply Checks

Power Supply and Gas Pressure Verification

Manometer Attachment and Blower/Burner Adjustment

Safety Inspection and Follow-Up

Safety Checks and Follow-Up

Steps for safety inspection and follow-up procedures.

Pilot Turn-Down Test Procedure

Gas Valve Leak Testing

Leak Test Steps and Post Start-Up Checks

Gas Leak Test Steps

Post Start-Up Check Items

Checklist for post start-up verification items.

OPERATION

Lighting Instructions

Step-by-step instructions for lighting the appliance.

To Turn Off Gas To Appliance

TROUBLESHOOTING

Troubleshooting Guide

General troubleshooting guide with step-by-step diagnostics.

MAINTENANCE

Suggested Maintenance Schedule

LIMITED PARTS WARRANTY

Warranty Scope and Exclusions

Making a Warranty Claim

START-UP CHECKLIST

Checklist Sections

Overview of the checklist sections for start-up.

Important Instructions for Massachusetts

Venting and Detector Requirements

Specific installation and safety requirements for Massachusetts.