AquaStar 125B LP - User Manual

WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Upon completion of the installation, these instructions
should be handed to the user of the appliance for
future reference.
FEATURING: Automatic Variable Power Modulating Gas
Valve
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LP and 125B NG (Flow Modulated)
Suitable for water (potable) heating and space heating
Intended for variable flow applications with steady cold water inlet temperatures. For preheated domestic
hot water, install the 125 BS model. For recirculating applications, install the 125 BL model.
WARNING
If the information in this manual is 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,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
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.
Specifications .................................................... Page 2
Rules for safe operation .................................... Page 4
Locating the Heater ........................................... Page 5
Combustion Air Requirements........................... Page 5
Mounting the Heater .......................................... Page 6
Venting the Heater ............................................. Page 6
Gas Connections ............................................... Page 7
Water Connections ............................................ Page 8
Safety before lighting the pilot............................ Page 8
Lighting instructions ........................................... Page 9
Setting water temperature ................................. Page 9
Maintenance & Service ...................................... Page 9
Trouble Shooting ............................................. Page 10
Diagram of AquaStar ....................................... Page 13
Components and Parts List ............................. Page 14
TABLE OF CONTENTS
6 720 605 297 PT 862 (12.98)

Summary

Specifications and Unpacking

Minimum Installation Clearances

General Rules for Safe Operation

Proper Location and Combustion Air

Mounting and Venting Installation

Vent Pipe Connection

Details on connecting the vent pipe, including size and rise requirements.

Gas Connections and Regulator

Maximum Inlet Gas Flow Pressure Setting

Specifies gas pressure settings for natural gas and liquid propane at different altitudes.

Gas Line Size Recommendations

Recommends pipe sizes for natural gas and liquid propane based on length.

Water Connections

Connecting the Pressure Relief Valve (PRV)

Instructions for installing the pressure relief valve and its discharge line.

Operating Instructions and Safety

Safety Before Lighting the Pilot

Essential safety precautions before attempting to light the pilot burner.

What to Do If You Smell Gas

Immediate actions to take if a gas leak is detected.

Lighting, Temperature Setting, and Maintenance

Vent System Maintenance

Annual inspection and maintenance recommendations for the vent system.

Water Valve Servicing

Periodic servicing of the water valve and checking the water inlet filter.

Pilot Flame Inspection

Guidance on the correct pilot flame appearance and troubleshooting weak flames.

Trouble Shooting: Pilot Issues

Pilot Light Will Not Light

Troubleshooting steps for when the pilot burner fails to ignite or stay lit.

Regulator Jammed

Diagnosis and resolution for a jammed gas regulator, particularly for LP gas.

Clogged Pilot Orifice or Dirty Air Screen

Addresses issues with clogged pilot orifices, dirty air screens, or dirty pilot gas filters.

Trouble Shooting: Burner and Water Flow Issues

Pilot Lights But Goes Out

Steps to take when the pilot flame extinguishes after release.

Burners Do Not Ignite

Diagnosing why burners fail to ignite when hot water is turned on.

Cold Water Inlet Connection Error

Ensuring the cold water inlet is connected to the correct side of the heater.

Low Water Flow Rate

Checking if the water flow rate is sufficient to activate the burners.

Dirty Water Inlet Filter

Cleaning the water inlet filter and faucet aerators.

Plumbing Crossover Issue

Diagnosing and resolving plumbing issues causing cross-flow of hot and cold water.

Trouble Shooting: Valve, Pilot, and Temperature

Water Valve Component Issues

Addressing problems with dirty or damaged water valve parts.

Pilot Light Out After Use

Troubleshooting pilot light extinction during or after hot water usage.

Water Too Hot

Adjusting settings and checking factors that cause excessively hot water.

Water Not Hot Enough

Identifying reasons for insufficient hot water output.

Temperature Fluctuations

Resolving issues causing inconsistent hot water temperatures.

Installation Checklist

Gas Line Size Checklist

Guidelines for selecting appropriate gas pipe sizes based on gas type and length.

Minimum Vent Size and Height Checklist

Specifications for minimum vent diameter and height for safe operation.

Water Pressure Checklist

Requirements for water pressure, particularly for well systems.

AquaStar 125B LP Specifications

General

Brand	AquaStar
Model	125B LP
Category	Water Heater
Language	English