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Jandy LG125 User Manual

Jandy LG125
40 pages
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WARNING: FOR YOUR SAFETY -
This product must be installed and serviced by
a professional service technician, qualified in pool heater installation. Improper instal-
lation and/or operation could create carbon monoxide gas in flue gases which could
cause serious injury, property damage, or death. For indoor installations, as an addi-
tional measure of safety, Waterpik Technologies strongly recommends installation of
suitable Carbon Monoxide detectors in the vicinity of this appliance and in any adja-
cent occupied spaces. Improper installation and/or operation will void the warranty.
H0264600A
Installation and Operation Data
WARNING: If these instructions are not followed exactly, a fire or explosion may
result, causing property damage, personal injury, or death.
Do not store or use gasoline or other flammable 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 nearby 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.
Installation and
Operation Manual
Lite2
Pool and Spa Heater
Model LG
Natural Gas or LP Gas

Table of Contents

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Jandy LG125 Specifications

General IconGeneral
ModelLG125
CategorySwimming Pool Heater
Heating Capacity125, 000 BTU/hr
Heat ExchangerCopper
Efficiency82%
Minimum Flow Rate20 GPM
Maximum Working Pressure50 PSI
Fuel TypeNatural Gas or Propane
IgnitionElectronic

Summary

Safety & Operation Warnings

For Your Safety

Product installation and operation safety guidelines, including carbon monoxide risks.

What to Do If You Smell Gas

Immediate actions to take if a gas leak is detected to prevent fire or explosion.

SECTION 1. General Information

1.1 Introduction

Provides installation and operation instructions for the Lite2 Model LG pool and spa heater.

1.2 Consumer Information and Safety

Details safe and reliable service, including warnings and cautions.

1.3 Warranty

Details the limited factory warranty, claim procedures, and exclusions.

1.4 Codes and Standards

Lists certifications, local codes, and national installation codes for gas fired pool heaters.

1.5 Technical Assistance

Provides contact information for Jandy technical support and distributors for assistance.

1.6 Materials Installer Must Provide

Lists materials the installer must supply for all installations and special installations.

1.7 Specifications

Details technical specifications including location, gas type, pressure, flow rate, and dimensions.

SECTION 2. Installation Instructions

2.1 Introduction

Details installation procedures, local codes, and national codes for proper heater installation.

2.2 Field Assembly

Describes procedures for assembling the heater components in the field, including drafthood installation.

2.3 Location Requirements

Specifies requirements for heater placement, clearances, flooring, and outdoor/shelter installations.

SECTION 3. Venting

3.1 Combustion Air Supply

Details requirements for sufficient air supply for proper combustion and ventilation of the surrounding area.

3.2 Vent Pipe Sizing and General Installation

Covers vent pipe sizing, installation for outdoor and indoor/shelter setups, and replacement.

SECTION 4. Gas Connections

4.1 Gas Supply and Piping

Provides instructions on gas supply, piping, sediment traps, shutoff valves, and pressure testing.

4.2 Manifold Pressure

Explains how to confirm and adjust manifold gas pressure for natural gas and LP heaters.

4.3 Special Precautions for LP Gas

Details specific safety precautions and installation requirements for LP gas.

SECTION 5. Water Connections

5.1 Water Piping

Illustrates typical piping, shutoff valve restrictions, and pressure switch adjustment considerations.

5.2 Check Valve Installation

Explains the importance of a check valve to protect against back-siphoning and dry starts.

5.3 Automatic Flow Control Valve

Describes the automatic flow control valve and its function in maintaining proper heater flow.

5.4 Reversible Water Connections

Provides procedures for switching the water connections to the opposite side of the heater.

5.5 Connections at Heater

Details how to connect threaded iron pipe, copper pipe, and plastic piping to the heater.

5.6 Pressure Relief Valve

Recommends and explains the installation of a pressure relief valve for safety and code compliance.

5.7 Auxiliary Components, Chlorinators, Ozone Generators, and Sanitizing Chemicals

Warns about material compatibility with chemicals and ozone, and proper installation of feeders.

SECTION 6. Electrical Connection

6.1 Main Power

Explains that the heater does not require external electrical power, operating on millivolts from a thermopile.

6.2 Bonding

Details the requirement to connect the heater to a bonding grid with a solid copper wire.

6.3 Auxiliary Time Clock Wiring

Provides instructions for wiring a time clock to control filter pump operation and the heater.

SECTION 7. Operating Instructions

7.1 Normal Operation

Describes the automatic operation cycle based on water flow and preset temperature settings.

7.2 Start-Up

Provides critical safety warnings and procedures for starting the heater for the first time or after maintenance.

7.3 Lighting and Shutdown Procedures

Outlines step-by-step instructions for lighting the pilot and shutting down the main burners and heater.

7.4 Turning the Heater On/Off and Setting the temperature control

Explains how to use the ON/OFF switch and rotary dial for temperature adjustment.

7.5 Water Pressure Switch Adjustment

Details how to adjust the water pressure switch to ensure proper safety and operation.

7.6 Temperature Rise

Describes how to perform a temperature rise test to confirm proper water flow and heater operation.

7.7 Adjusting the Manual Bypass Valve

Provides procedures for adjusting a manual bypass valve to optimize temperature rise.

SECTION 8. Maintenance

8.1 Water Chemistry

Explains the importance of proper water chemistry for spa and pool heaters and lists recommended levels.

8.2 Seasonal Care

Covers procedures for seasonal operation, including spring/fall and winterizing the heater.

8.3 Inspection and Service

Recommends periodic inspections and basic safety checks for safe and efficient operation.

SECTION 9. Troubleshooting

9.1 General Heater Troubleshooting

Provides general tips for common problems, causes, and solutions encountered during first-time use or start-up.

9.2 Trouble Shooting Guide

A table listing symptoms, causes, and remedies for various heater operational issues.

SECTION 10. Professional Maintenance, Service and Diagnostic Trouble Shooting

10.1 General Information

Emphasizes that service must be performed by a qualified technician and owner checks.

10.2 Natural-Draft Combustion System

Illustrates and explains the atmospheric combustion system of the Lite2 LG pool heater.

10.3 Heater Components and Their Operation

Describes key components like gas valve, temperature control, pilot, limit switches, etc.

10.4 Electrical Troubleshooting

Provides procedures for checking pilot generator, controls, and wiring for electrical faults.

SECTION 11. Replacement Parts

11.1 Ordering Information

Provides instructions on how to order or purchase parts for the Lite2 model LG pool/spa heater.

11.2 Parts List

Contains a list of parts, general exploded view, and detailed exploded views for identification.

11.3 General Exploded View

Diagram showing the assembly of various heater components with part numbers.

11.4 Detailed Exploded View

Detailed diagrams illustrating the assembly of specific heater components for part identification.

LIMITED WARRANTY

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