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JANDY Värmare LX LT Low Nox

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FOR YOUR SAFETY - This product must be installed and serviced by authorized person-

nel, qualified in pool/spa heater installation. 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, Jandy Pool

Products, 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.

H0256100F

Installation and Operating Data

WARNING

If these instructions are not followed exactly, a re 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 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.

Installation and

Operation Manual

LX® and

LT® Low NOx*

Gas-Fired Pool

and Spa Heater

Model LX/LT-Low NOx*

Natural Gas and LP

*Only models using natural gas are certified

as meeting low NOx emissions requirements.

Model

LX250-L

Shown

TABLE OF CONTENTS

SECTION 1. General Information

1.1 Introduction .................................................1

1.2 Consumer Information and Safety ................1

1.2.1 Spa/Hot Tub Safety Rules ...........................1

1.2.2 Swimming Pool Energy Safety Tips .............2

1.3 Warranty ..................................................... 2

1.4 Codes and Standards ..................................2

1.5 Technical Assistance ..................................3

1.6 Materials Installer Must Provide ...................3

1.6.1 Materials for All Applications ....................... 3

1.6.2 Materials for Special Applications................3

1.7 Specifications ..............................................3

1.7.1 General Specifications ................................ 3

1.7.2 Dimensions .................................................4

SECTION 2. Installation Instructions

2.1 Introduction .................................................5

2.2 Field Assembly ...........................................5

2.3 Location Requirements ................................ 5

2.3.1 Introduction .................................................5

2.3.2 Clearances ..................................................5

2.3.3 Flooring .......................................................6

2.3.4 Outdoor Installation .....................................6

2.3.5 Indoor and Outdoor Shelter Installation ........ 7

2.3.5.1 Converting the Grill to a Vent Collar .............8

SECTION 3. Venting

3.1 Combustion Air Supply ................................ 8

3.2 Exhaust Venting..........................................9

3.3 Vent Pipe Sizing and General Installation ....10

3.3.1 Outdoor Installations ................................... 10

3.3.2 Indoor and Outdoor Shelter Installations ...... 10

3.3.3 Inspection and Replacement of Existing

Vent System with New Components ...........11

SECTION 4. Gas Connections

4.1 Gas Supply and Piping ................................ 11

4.2 Manifold Pressure ....................................... 12

4.3 Special Precautions for Propane Gas ..........13

SECTION 5. Water Connections

5.1 Water Piping ............................................... 13

5.2 Check Valve Installation .............................. 13

5.3 Automatic Flow Control Valve ......................13

5.4 Reversible Water Connections .....................14

5.5 Connections at Heater .................................16

5.6 Pressure Relief Valve ..................................17

5.7 Auxiliary Components, Chlorinators, Ozone

Generators, and Sanitizing Chemicals ......... 18

SECTION 6. Electrical

6.1 General Information .....................................18

6.2 Main Power .................................................18

6.2.1 Converting the Heater for a 115V

Power Source ....................................... 20

6.3 Bonding .......................................................20

6.4 Auxiliary Time Clock Wiring ........................ 21

6.5 Remote Operation .......................................21

SECTION 7. Operating Instructions

7.1 Normal Operation ...................................... 23

7.2 Start-Up .................................................... 23

7.3 Temperature Controls ................................ 24

7.3.1 Information Displayed ................................ 24

7.3.2 Turning the Heater On or Off ......................25

7.3.3 Setting Pool and Spa Temperatures,

Changing from Fahrenheit to Celsius.... 26

7.4 Lighting and Shutdown Procedures ........... 26

7.4.1 Lighting the Heater .................................... 26

7.4.2 Shut Down ................................................26

7.5 Adjusting the Water Pressure Switch ........ 28

7.6 Temperature Rise ...................................... 29

SECTION 8. Maintenance

8.1 Water Chemistry ....................................... 30

8.2 Seasonal Care ..........................................30

8.2.1 Spring and Fall Operation .......................... 30

8.2.2 Winterizing ................................................ 30

8.2.3 Spring Start-up .......................................... 31

8.3 Inspection and Service .............................. 31

8.3.1 Owner Inspection ...................................... 31

8.3.2 Professional Inspection ............................. 32

SECTION 9. Troubleshooting

9.1 General Heater Troubleshooting Guide ......32

9.2 Service Codes ...........................................33

9.3 Ignition Control LED Service Codes ........... 33

SECTION 10. Professional Maintenance

and Service

10.1 General Information ................................... 36

10.2 "Premix" Induced Draft

Combustion System ..............................36

10.3 Special Service Issues

Premix Combustion System .................. 37

10.3.1 System Operation ..................................... 37

10.3.2 Field Service and Adjustment .................... 37

10.4 Heater Components and Their Operation ...38

10.5 Electrical Trouble Shooting ........................ 38

10.5.1 Electrical Power Supply ............................39

10.5.2 Controller .................................................. 39

10.5.3 Control Circuit Trouble Shooting ................ 39

10.5.3.1 Transformer ............................................... 40

10.5.3.2 Fuse ......................................................... 40

10.5.3.3 Water Pressure Switch/External Interlock

or Fireman Switch Circuit..................... 40

10.5.3.4 Temperature Limit Switches Circuit ........... 40

10.5.3.5 Fusible Link/Manual Reset Limit Switch

Circuit .................................................. 41

10.5.3.6 Blower Pressure Switch Circuit ................. 41

10.5.3.7 Gas Valve Voltage .................................... 42

10.5.3.8 Igniter/Ignition Control Circuit ..................... 42

SECTION 11. Replacement Parts

11.1 Ordering Information .................................. 46

11.2 Parts List .................................................. 47

11.3 General Exploded View ............................. 48

11.4 Detailed Exploded View ............................ 49

Warranty .....................................Back Cover

LX and LT Low NOx Pool/Spa Heater Page 1

SECTION 1.

General Information

1.1 Introduction

This manual provides installation and operation

instructions for the LX and LT Low NOx pool and

spa heaters. Read these installation and operation

instructions completely before proceeding with the

installation. Consult the Jandy factory, or local

factory representative, with any questions regarding

this equipment.

Certain sections of this manual are specific to

either United States or Canadian installations, and are

labeled as such.

The LX and LT Low NOx heaters get their

electrical power from an external 115VAC or

230VAC source and provide a dual electronic thermo-

stat control system for pool/spa combinations or

preheat convenience.

The LX and LT Low NOx heaters are specifi-

cally designed for heating fresh water swimming pools

and spas, and with proper installation and care, they

will provide years of reliable service. Do not use the

heater to maintain pool or spa water temperature

below 70°F. Do not use it as a heating boiler or

general service water heater or to heat salt water.

Consult your dealer for the appropriate Jandy products

for these applications.

In the LX and LT heaters, low NOx operation is

achieved through use of a special “premix” combustion

system. The operation of this type of system is af-

fected by fuel gas properties. As noted in the trouble-

shooting and maintenance sections of this manual,

adjustments may be necessary if the local gas supply is

of especially high or low heat content.

1.2 Consumer Information and Safety

The LX and LT Low NOx heaters are designed

and manufactured to provide many years of safe and

reliable service when installed, operated and main-

tained according to the information in this manual and

the installation codes referred to in later sections.

Throughout the manual safety warnings and cautions

are identified by the " " symbol. Be sure to read and

comply with all of the warnings and cautions.

1.2.1 Spa/Hot Tub Safety Rules

WARNING

The following “Safety Rules for Hot Tubs,”

recommended by the U.S. Consumer Product

Safety Commission, should be observed when

using the spa.

AVERTISSEMENT

Les Règlements suivants pour Cuves

Thermales, tel que recommandés par la

Commission U.S. de Sécurité des Produits

pour les Consommateurs, devraient être

respectés lors de l’utilisation du spa.

WARNING

The U.S. Consumer Product Safety

Commission warns that elevated water

temperature can be hazardous. Consult heater

operation and installation instructions for water

temperature guidelines before setting

temperature.

AVERTISSEMENT

La U.S. Consumer Product Safety Commission

indique que des températures de l'eau élevées

peuvent être dangereuses. Voir la notice

d'installation et de fonctionnement pour le

réglage de la température.

1. Spa or hot tub water temperature should never

exceed 104°F (40°C). One hundred degrees

Fahrenheit (100°F [38°C]) is considered safe for

a healthy adult. Special caution is recommended

for young children.

2. The drinking of alcoholic beverages before or

during spa or hot tub use can cause drowsiness

which could lead to unconsciousness, and

subsequently result in drowning.

3. Pregnant women take note! Soaking in water

above 102°F (38.5°C) can cause fetal damage

during the first three months of pregnancy (which

could result in the birth of a brain-damaged or

deformed child). If pregnant women are going to

use a spa or hot tub, they should make sure the

water temperature is below 100°F (38°C)

maximum.

4. The water temperature should always be

checked with an accurate thermometer before

entering a spa or hot tub. Temperature controls

may vary by as much as 1F° (1C°).

5. Persons with a medical history of heart disease,

diabetes, circulatory or blood pressure problems

should consult their physician before using a hot

tub or spa.

6. Persons taking any medication which induces

drowsiness (e.g., tranquilizers, antihistamines, or

anticoagulants) should not use spas or hot tubs.

7. Prolonged immersion in hot water can induce

hyperthermia.

Produktspecifikationer

Varumärke:	JANDY
Kategori:	Värmare
Modell:	LX LT Low Nox

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