Zodiac Jandy LXi User Manual

H0286900 Rev N
Jandy
®
LXi
™
Gas-FiredPool
andSpaHeater
byZodiac
MODEL ZODIAC LXI
NATURAL GAS AND LP
INSTALLATION AND
OPERATION MANUAL
ENGLISH
WARNING
FOR YOUR SAFETY: This product must be installed and serviced by a contractor who is licensed and qualified
in pool equipment by the jurisdiction in which the product will be installed where such state or local requirements
exists. In the event no such state or local requirement exists, the installer or maintainer must be a professional with
sufficient experience in pool equipment installation and maintenance so that all of the instructions in this manual
can be followed exactly. Before installing this product, read and follow all warning notices and instructions that
accompany this product. Failure to follow warning notices and instructions may result in property damage, personal
injury, or death. Improper installation and/or operation can create carbon monoxide gas and flue gases which can
cause serious injury, property damage, or death. For indoor installations, as an additional measure of safety, Zodiac
Pool Systems, Inc. strongly recommends installation of suitable Carbon Monoxide detectors in the vicinity of this
appliance and in any adjacent occupied spaces. Improper installation and/or operation will void the warranty.
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 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.
If these instructions are not followed exactly, a fire or explosion may result,
causing property damage, personal injury, or death.
LP Gas for Indoor/Outdoor Use
Please refer to Section 4.3 of this manual for
precautions when installed indoors.

Zodiac Jandy LXi Specifications

General

Brand	Zodiac
Model	Jandy LXi
Category	Swimming Pool Heater
Language	English

Summary

Section 1. General Information

1.2 Consumer Information and Safety

Emphasizes safe and reliable service through proper installation, operation, and maintenance.

1.2.1 Spa/Hot Tub Safety Rules

Safety rules for hot tubs recommended by the U.S. Consumer Product Safety Commission.

1.7 Specifications

1.7.1 General Specifications

Section 2. Installation Instructions

2.3 Location Requirements

Details requirements for heater placement, including clearances and flooring.

2.3.4 Outdoor Installation

Section 3. Venting

3.1 Combustion Air Supply

Details requirements for adequate combustion air openings, especially for indoor/shelter installations.

3.2 Exhaust Venting

Explains procedures for converting to indoor/shelter venting and pipe sizing.

3.3 Vent Pipe Sizing and General Installation

Covers vent pipe sizing for Category I/III appliances and general installation considerations.

Section 4. Gas Connections

4.1 Gas Supply and Piping

Covers gas supply type, piping installation, and safety precautions for natural gas and LP.

4.2 Manifold Pressure

Explains how to check and adjust manifold gas pressure for proper heater operation.

4.3 Special Precautions for LP Gas

Section 5. Water Connections

5.5 Connections at Heater

Explains how to connect PVC/CPVC pipes and install the Zodiac Sweep Elbow.

5.6 Pressure Relief Valve and Temperature Relief Valve

Discusses the recommendation and installation of pressure relief and temperature relief valves.

Section 6. Electrical

6.2 Main Power

Details electrical supply requirements and wiring for 120V or 240V AC.

6.2.1 Converting the Heater for a 120V Power Source

6.5 Optional Remote Controls

6.5.1 Connection to a Remote Pool-Off-Spa Selector (3-Wire Connection)

6.5.2 Connection to an AquaLink® RS Control System or Remote TSTAT (2-Wire Connection)

Section 7. Operating Instructions

7.1 Normal Operation

Describes the automatic operation cycle based on temperature settings and external controls.

7.2 Start-Up

Provides safety precautions and initial steps for starting the heater.

7.3 Operating the Controller

Explains how to use the advanced microprocessor-based controller for pool and spa modes.

7.3.2 Pool Mode - (Normal Heat)

7.3.3 Pool Mode - (Optional Maintain Heat)

7.3.4 Spa Mode - (Normal Heat)

7.3.5 Spa Mode - (Optional Maintain Heat)

7.6 Lighting and Shutdown Procedures

Safety warnings and procedures for lighting and shutting down the heater.

7.7 Adjusting the Water Pressure Switch

How to adjust the water pressure switch for proper heater operation and safety.

7.8 Temperature Rise

7.9 Burner Throat Pressure Adjustment

Procedure for adjusting burner throat pressure for optimal combustion.

Section 8. Maintenance

8.1 Water Chemistry

Importance of maintaining proper water chemistry for heater longevity and safety, especially in spas.

8.2 Seasonal Care

8.3 Inspection and Service

Importance of periodic inspections for safe and efficient operation, and potential hazards of improper maintenance.

8.3.2 Professional Inspection

Section 9. Troubleshooting

9.1 General Heater Troubleshooting

Overview of common problems, causes, and solutions for heater operation.

9.2 Service Codes

Lists FAULT messages displayed by the controller and their potential causes/remedies.

9.3 Ignition Control LED Service Codes

Explains LED fault codes on the ignition controller indicating various faults.

LXi Troubleshooting Guide

A table listing common symptoms, their causes, and suggested remedies for troubleshooting.

LXi Heater Service Diagnostic Guide

A guide to diagnostic fault messages and their corresponding remedies for the LXi heater.

Section 10. Professional Maintenance and Service

10.2 "Premix" Forced-Draft Combustion System

10.3 Heater Components and Their Operation

10.4 Special Service Issues - Premix Combustion System

Discusses issues related to fuel/air imbalance and burner throat pressure.

10.4.1 System Operation

10.4.2 Field Service and Adjustment

10.4.3 Burner Throat Pressure Adjustment

Step-by-step guide to adjusting the burner throat pressure using the air orifice slider.

10.5 Electrical Troubleshooting

Provides procedures for checking electrical power and control components.

10.5.1 Electrical Power Supply

How to check supply voltage and identify potential power supply problems.

10.5.3 Control Circuit Troubleshooting

Detailed troubleshooting steps for various control circuits.

10.5.3.3 Water Pressure Switch

10.5.3.4 Roll-Out (Fusible Link) Switch

10.5.3.5 Temperature Limit Switches Circuit

10.5.3.6 Blower Pressure Switch Circuit

10.5.3.7 Gas Valve Voltage

How to check voltage to the gas valve and diagnose issues.

10.5.3.8 Igniter/Ignition Control Circuit

Detailed troubleshooting for the igniter and ignition control circuit, including voltage and resistance checks.