Jandy LXI Mode d'emploi

Marque: Jandy

Modèle: LXI

Taper: Mode d'emploi

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

authorized personnel, qualiﬁ ed in pool/spa heater installation. Improper installation

and/or operation can create carbon monoxide gas and ﬂ ue 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 adja-

cent occupied spaces. Improper installation and/or operation will void the warranty.

Installation and

Operation Manual

LXi

™

Gas-Fired Pool

and Spa Heater

Model LXi

™

Natural Gas and LP

WARNING

If these instructions are not followed exactly, a ﬁ re or explosion may result,

causing property damage, personal injury, or death.

Do not store or use gasoline or other ﬂ ammable 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 ﬁ re department.

Installation and service must be performed by a qualiﬁ ed installer, service

agency or the gas supplier.

Installation and Operating Data

H0286900E

LXi

™

Pool/Spa Heater Installation and Operation Manual Page 3

Section 1. General Information .............. 5

1.1 Introduction ..............................................5

1.2 Consumer Information and Safety ...........5

1.2.1 Spa/Hot Tub Safety Rules ..........5

1.2.2 Swimming Pool Energy

Saving Tips ................................6

1.3 Warranty ..................................................6

1.4 Codes and Standards ..............................6

1.5 Technical Assistance ...............................7

1.6 Materials Installer Must Provide ..............7

1.6.1 Materials for All Applications ......7

1.6.2 Materials for Special

Applications ................................7

1.7 Speciﬁ cations ..........................................7

1.7.1 General Speciﬁ cations ...............7

1.7.2 Dimensions ................................8

Section 2. Installation Instructions ........ 9

2.1 Introduction ..............................................9

2.2 Field Assembly .......................................9

2.3 Location Requirements ...........................9

2.3.1 Introduction ................................9

2.3.2 Clearances .................................9

2.3.3 Flooring ......................................10

2.3.4 Outdoor Installation ....................10

2.3.5 Indoor and Outdoor Shelter

Installations ................................11

2.3.5.1 Converting the Grill to a

Vent Collar ...........................12

Section 3. Venting.................................... 12

3.1 Combustion Air Supply ............................12

3.2 Exhaust Venting ......................................13

3.3 Vent Pipe Sizing and General

Installation ..............................................14

3.3.1 Outdoor Installations ..................14

3.3.2 Indoor and Outdoor Shelter

Installations ................................14

3.3.3 Inspection and Replacement of

Existing Vent System with New

Components ..............................15

Section 4. Gas Connections ................... 16

4.1 Gas Supply and Piping ............................16

4.2 Manifold Pressure ...................................17

4.3 Special Precautions for LP Gas ..............17

Section 5. Water Connections ................ 18

5.1 Water Piping ............................................18

5.2 Check Valve Installation ..........................18

5.3 Automatic Flow Control Valve .................18

5.4 Reversible Water Connections ................18

5.5 Connections at Heater .............................20

5.6 Pressure Relief Valve ..............................22

5.7 Auxiliary Components, Chlorinators,

Ozone Generators, and Sanitizing

Chemicals ................................................23

Section 6. Electrical................................. 23

6.1 General Information .................................23

6.2 Main Power .............................................23

6.2.1 Converting the Heater for a

120V Power Source ...................25

6.3 Bonding ...................................................25

6.4 Optional Pump Connection

(Maintain Temp Feature) .........................26

6.5 Optional Remote Controls .......................26

6.5.1 Connection to a Remote

Pool-Off-Spa Selector

(3-Wire Connection) ...................27

6.5.1.1 Install the Remote Pool-Off-

Spa Selector ........................27

6.5.1.2 Conﬁ gure the Control

Panel ...................................27

6.5.2 Connection to an AquaLink

Control System or Remote

TSTAT (2-Wire Connection) .......27

6.5.2.1 Install the Remote TSTAT ....27

6.5.2.2 Conﬁ gure the Control

Panel ...................................28

6.5.2.3 Remote Operation ..............28

6.5.3 Connection to a Secondary

Use Interface ..............................30

Table of Contents

Page 4 LXi

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Pool/Spa Heater Installation and Operation Manual

Section 7. Operating Instructions .......... 30

7.1 Normal Operation ....................................30

7.2 Start-Up ...................................................30

7.3 Operating the Controller ..........................31

7.3.1 Off Mode ....................................32

7.3.2 Pool Mode - (Normal Heat) ........32

7.3.3 Pool Mode - (Optional Maintain

Heat) ..........................................32

7.3.4 Spa Mode - (Normal Heat) .........32

7.3.5 Spa Mode - (Optional Maintain

Heat) ..........................................32

7.4 User Setup Options .................................32

7.4.1 Language Setup .........................32

7.4.2 Temperature Scale Setup ..........33

7.4.3 Spa Timer Setup ........................33

7.4.4 Display Light Setup ....................33

7.5 Set Point Lockout ....................................33

7.6 Lighting and Shutdown Procedures ........33

7.6.1 Lighting the Heater .....................35

7.6.2 Shutdown ...................................35

7.7 Adjusting the Water Pressure Switch ......35

7.8 Temperature Rise ....................................36

7.9 Burner Throat Pressure Adjustment ........37

Section 8. Maintenance ........................... 37

8.1 Water Chemistry ......................................37

8.2 Seasonal Care .........................................38

8.2.1 Spring and Fall Operation ..........38

8.2.2 Winterizing .................................38

8.2.3 Spring Start-up ...........................38

8.3 Inspection and Service ............................38

8.3.1 Owner Inspection .......................39

8.3.2 Professional Inspection ..............39

Section 9. Troubleshooting .................... 40

9.1 General Heater Troubleshooting .............40

9.2 Service Codes .........................................40

9.3 Ignition Control LED Service Codes ........40

Section 10. Professional Maintenance and

Service .................................. 43

10.1 General Information .................................43

10.2 “Premix” Forced-Draft Combustion

System ....................................................43

10.3 Heater Components and Their

Operation .................................................43

10.4 Special Service Issues - Premix

Combustion System ................................44

10.4.1 System Operation .......................44

10.4.2 Field Service and Adjustment .....44

10.4.3 Burner Throat Pressure

Adjustment .................................45

10.5 Electrical Troubleshooting .......................45

10.5.1 Electrical Power Supply ..............45

10.5.2 Controller ...................................46

10.5.3 Control Circuit Troubleshooting ..46

10.5.3.1 Transformer .........................46

10.5.3.2 Fuse ....................................46

10.5.3.3 Water Pressure Switch ........46

10.5.3.4 Fusible Link .........................47

10.5.3.5 Temperature Limit Switches

Circuit ..................................47

10.5.3.6 Blower Pressure Switch

Circuit ..................................47

10.5.3.7 Gas Valve Voltage ...............48

10.5.3.8 Igniter/Ignition Control

Circuit ..................................48

Section 11. Replacement Parts .............. 51

11.1 Ordering Information ...............................51

11.2 Parts List .................................................51

11.3 General Exploded View ...........................53

11.4 Detailed Exploded View ..........................54

11.5 Exploded View of Heat Exchanger,

ASME ......................................................55

Table of Contents (Continued)

LXi

™

Pool/Spa Heater Installation and Operation Manual Page 5

Section 1. General Information

1.1 Introduction

This manual provides installation and operation

instructions for the LXi

™

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 speciﬁ c to

either United States or Canadian installations, and are

labeled as such.

The LXi heater gets electrical power from an

external 120VAC or 240VAC source and provides a

dual electronic thermostat control system for pool/spa

combinations or preheat convenience.

The LXi heater is speciﬁ cally designed for heat-

ing 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 LXi heater, operation is achieved through

use of a special “premix” combustion system. The

operation of this type of system is affected by fuel gas

properties. As noted in the troubleshooting and main-

tenance 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 LXi heater is designed and manufactured to

provide many years of safe and reliable service when

installed, operated, and maintained according to the

information in this manual and the installation codes

referred to in later sections. Throughout the manual

safety warnings are identiﬁ ed by the “

” symbol and

safety cautions are surrounded by a border. 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,” recom-

mended 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 haz-

ardous. 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 peu-

vent 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 subse-

quently result in drowning.

3. Pregnant women take note! Soaking in water

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

during the ﬁ rst 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.

Page 6 LXi

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Pool/Spa Heater Installation and Operation Manual

Hyperthermia occurs when the internal body

temperature reaches a level several degrees above the

normal body temperature of 98.6°F (37°C). Symptoms

include dizziness, fainting, drowsiness, lethargy, and

an increase in the internal body temperature. The ef-

fects of hyperthermia include:

• Lack of awareness of impending hazard

• Failure to perceive heat

• Failure to recognize need to leave spa

• Physical inability to leave spa

• Fetal damage in pregnant women

• Unconsciousness resulting in a danger of

drowning

1.2.2 Swimming Pool Energy Saving

Tips

Jandy Pool Products, Inc., offers the following

recommendations to help conserve fuel and minimize

the cost of operating your pool heater without sacri-

ﬁ cing comfort.

1. The American Red Cross recommends a maxi-

mum water temperature of 78°F (25°C). Use an

accurate pool thermometer. A difference of 4F°

(2°C), between 78°F and 82°F (26°C and 28°C),

will use as much as 40% more gas.

2. Carefully monitor the water temperature of your

pool in the summertime. You can reduce heater

usage due to warmer air temperatures.

3. Find the proper setting on the pool heater tem-

perature control and use the Set Point Lockout

feature to discourage further adjustments.

4. Set the pump time clock to start the pump no ear-

lier than 6:00 AM during the pool heating season.

This is the time when nightly heat loss balances.

5. If the pool is only going to be used on weekends,

reduce the heater temperature control setting by

8 or 10 degrees during the week. Reset it to the

78°F (25°C) level a day or so before you plan to

use the pool.

6. During the winter or when on vacation for longer

than a week, shut down the heater by following

the shutdown instructions found on the inside of

the heater.

7. Where possible, shelter the pool from prevailing

winds with well-trimmed hedges or other land-

scaping, cabanas, or fencing.

8. Always use a pool cover when practical. Besides

providing a valuable safety feature, a pool cover

will reduce heat loss, conserve chemicals, and

reduce the load on ﬁ lter systems.

1.3 Warranty

The LXi heater is sold with a limited factory war-

ranty. Details are speciﬁ ed on the back cover of this

manual.

Make all warranty claims to an authorized Jandy

representative or directly to the factory. Claims must

include the heater serial number and model (this infor-

mation can be found on the rating plate), installation

date, and name of the installer. Shipping costs are not

included in the warranty coverage.

The warranty does NOT cover damage caused

by improper assembly, installation, operation or ﬁ eld

modiﬁ cation. Also, damage to the heat exchanger by

corrosive water is NOT covered by the warranty. See

Section 8.1, Water Chemistry, for maintaining proper

pool water chemistry.

NOTE Keep this manual in a safe place for future

reference when inspecting or servicing the heater.

1.4 Codes and Standards

The LXi pool and spa heaters are design-certiﬁ ed

by CSA (Canadian Standards Association) as com-

plying with the latest edition of the Standard for Gas

Fired Pool Heaters, ANSI Z21.56 in the USA and

CAN-4.7 in Canada.

All Jandy heaters must be installed in accordance

with the local building and installation codes as per

the utility or authorities having jurisdiction. All local

codes take precedence over national codes.

In the absence of local codes, refer to the latest

edition of the following national codes for installation:

1. In the United States, the National Fuel Gas Code,

NFPA 54/ANSI Z223.1. Pay particular attention

to the chapter addressing Venting of Equipment.

2. In Canada, the Natural Gas and Propane Instal-

lation Code, CAN/CSA-B149.1.

The LXi pool and spa heaters meet or exceed the

requirements of energy conservation regulations, such

as those in California, Hawaii, New York, Oregon and

other states that require that a pool heater have inter-

mittent ignition. In addition, the natural gas models

of this heater comply with both the California South

Coast Air Quality Management District's (SCAQMD)

Rule 1146.2 and the Title 30, Texas Administrative

Code, Chapter 117, Section 117.465 for Nitrogen

Oxide (NOx) emissions.

LXi

™

Pool/Spa Heater Installation and Operation Manual Page 7

Any changes to the heater, gas controls, gas

oriﬁ ces, wiring, draft diverter, or improper installation

may void the warranty. If change is required to any of

the above, consult the factory.

1.5 Technical Assistance

Consult Jandy Pool Products, Inc. or your lo-

cal Jandy distributor with any questions or problems

involving the speciﬁ cations, installation, and operation

of your Jandy equipment. An experienced member

of the technical support staff is ready to assist you in

assuring the proper performance and application of

Jandy products. For technical support, call the Techni-

cal Service Department at 1.707.776-8200,

extension 260.

1.6 Materials Installer Must Provide

1.6.1 Materials for All Applications

The following items are needed and are to be

supplied by the installer for all LXi heater

installations:

1. The correct size gas pipe to supply gas from the

meter to the heater. See Section 4.1.

2. A manually operated gas valve to be installed in

the gas line outside of the heater jacket.

3. A suitable gas union joint to connect the heater to

the gas line outside of the heater.

4. Plumbing items needed to provide a sediment

trap (drip leg) in the gas line between the manual

gas valve and the heater. See Section 4.1.

5. A 120V AC or 240V AC power supply. A junc-

tion box is not needed at the heater; connections

are made inside of the heater jacket.

1.6.2 Materials for Special

Applications

In addition to the items listed above, the follow-

ing items are needed for special applications:

1. A factory authorized vent collar and any vent

pipe needed for indoor installations in the USA

and outdoor shelter installations in Canada. (See

Section 3.3.2). A vertical vent collar comes with

the unit. A side vent kit is available from your

Jandy distributor.

2. Primer and cement suitable for cementing CPVC

pipe to PVC pipe and an appropriate coupling

for connecting the factory supplied CPVC pipe

nipples to PVC pool plumbing.

3. A noncombustible platform for installation on

combustible surfaces. (See Section 2.3.3.) Non-

combustible bases are available from your Jandy

distributor.

1.7 Speciﬁ cations

1.7.1 General Speciﬁ cations

1. Installation Location:

Certiﬁ ed for use:

In the USA:

Natural Gas: Indoor and Outdoor

LP: Indoor and Outdoor

In Canada:

Natural Gas : Outdoor and Outdoor

Shelter

LP: Outdoor and Outdoor

Shelter

2. Minimum Clearance From Combustible

Material:

See Table 2 in Section 2.3.2.

3. *Gas Pipe/Heater Gas Valve Connection:

Natural Gas: 3/4" NPT

LP: 3/4" NPT

For diameter of gas line from meter to heater, see Table 5 in

Section 4.1.

4. Supply Gas Type:

Certiﬁ ed for use with:

Natural Gas and LP

5. Inlet Gas Supply Pressure:

Minimum Maximum

Natural Gas: 5.0 "WC 10.5 "WC

LP: 11.0 "WC 14.0 "WC

6. Air Plenum Pressure: 1.5 "WC

7. Burner Throat Pressure: 1.0 "WC

8. Water Pipe/Heater Connection:

*2" Unthreaded PVC or CPVC

Other size pipes may be used. See Section 5.5 for details

9. Water Flow Rate:

Maximum: 125 gpm (475 lpm)

Minimum: 30 gpm (110 lpm)

10. Working Water Pressure:

Maximum: 75 psi

11. Exhaust Vent Connection Size:

Model:

250 6" Diameter

300 7" Diameter

400 8" Diameter

Page 8 LXi

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Pool/Spa Heater Installation and Operation Manual

Model

Heater Width

Dim "A"

Vent Diameter Firing Rate

in. cm in. cm BTU/HR kcal

250 23.5 59.7 6 15.2 250,000 63

300 26.5 67.3 7 17.8 300,000 75

400 32.0 81.3 8 20.3 399,000 101

12. Electrical Supply:

Either 120 Volts AC or 240 Volts AC.

13. Modiﬁ cation of Heater for High Altitude:

LXi heaters are normally shipped from the fac-

tory in the low altitude (sea level) operational

conﬁ guration. Table 1 deﬁ nes the altitude des-

ignations as described by the Standard for Gas

Fired Pool Heaters, ANSI Z21.56 in the United

States and Gas-Fired Appliances For Use At

High Altitudes, CAN1-2.17 in Canada. When

an LXi heater is to be installed in a high altitude

application, the burner throat pressure will need

to be adjusted to achieve 1.0"WC. See Section

10.4.3 for instructions on how to do this.

1.7.2 Dimensions

See Figure 1 for a diagram showing the heater's

exterior dimensions and dimensions to critical connec-

tions on the heater.

Figure 1. General Conﬁ guration

6.9”

(17.5 cm)

11.2”

(28.4 cm)

13.1”

(33.3 cm)

27.5”

(69.9 cm)

18.5”

(47 cm)

15.5”

(

39.4 cm

)

22.3”

(56.6 cm)

5.5”

(14 cm)

6.0”

(15.2 cm)

Table 1. Altitude Designations For The LXi Heater

NATURAL GAS

ALTITUDE

DESIGNATION

UNITED

STATES

CANADA

LOW ALTITUDE 0-4500 FT 0-4500 FT

(0-1370 M)

HIGH ALTITUDE 4501-10,000 FT NOT

APPLICABLE

LOW ALTITUDE 0-4500 FT 0-4500 FT

(0-1370 M)

HIGH ALTITUDE 4501-10,000 FT NOT

APPLICABLE

LXi

™

Pool/Spa Heater Installation and Operation Manual Page 9

Section 2. Installation Instructions

2.1 Introduction

WARNING

Improper installation or maintenance can cause

nausea or asphyxiation from carbon monoxide in

ﬂ ue gases which could result in severe injury, or

death. For indoor installations, as an additional

measure of safety, Jandy Pool Products, Inc.

strongly recommends installation of suitable Car-

bon Monoxide detectors in the vicinity of this appli-

ance and in any adjacent occupied spaces.

AVERTISSEMENT

Une installation ou un entretien inadéquat peut

causer la nausée ou l’asphyxie en raison du

monoxyde de carbone présent dans les gaz de

combustion et même entraîner des blessures

graves ou la mort. Pour les installations intéri-

eures, comme mesure de sécurité additionnelle,

Jandy Pool Products, Inc. recommande forte-

ment l’installation de détecteurs de monoxyde de

carbone près de cet appareil ainsi que dans les

espaces adjacents occupés.

Install the LXi heater and vent collar in accor-

dance with the procedures in this manual, local codes

and ordinances, and in accordance with the latest edi-

tion of the appropriate national code. See Section 1.4,

Codes and Standards.

All gas-ﬁ red products require correct installation

to assure safe operation. The requirements for pool

heaters include the following:

1. Field assembly (if required)

2. Appropriate site location (clearances) and ﬂ ooring

3. Sufﬁ cient combustion and ventilation air

4. Properly sized gas meter and piping

5. Proper electrical wiring (if required)

6. Adequate water ﬂ ow

This manual provides the information needed to

meet these requirements. Review all application and

installation procedures completely before continuing

the installation.

2.2 Field Assembly

The LXi heater can be installed in a variety of

ways, some of them requiring preparation or assembly

in the ﬁ eld. The heater is shipped from the factory

with an exhaust vent conﬁ gured for an outdoor instal-

lation. The LXi heater is also design certiﬁ ed for “In-

door” installations in the United States and “Outdoor

Shelter” installations in Canada when equipped with a

vent collar and the appropriately sized exhaust vent.

Check the rating plate on the heater or the Parts

List (Section 11.2) in this manual for the correct Jandy

vent collar part number. For speciﬁ c installation infor-

mation see Section 2.3.5, Indoor and Outdoor Shelter

Installations.

Water connections are provided on the right side

of the heater but can be changed to the left side by

reversal of the heat exchanger. It is best to handle these

preparations before the heater is installed in its ﬁ nal lo-

cation. See Section 5.4, Reversible Water Connections,

in this manual for instructions.

2.3 Location Requirements

2.3.1 Introduction

CAUTION

When pool equipment is located below the pool sur-

face, a leak from any component can cause large

scale water loss or ﬂ ooding. Jandy Pool Products,

Inc., cannot be responsible for such water loss or

ﬂ ooding or resulting damage.

ATTENTION

Lorsque l’équipement d’une piscine est situé sous

la surface de l’eau, une fuite provenant de n’importe

quel élément peut causer une perte d’eau importante

ou une inondation. Jandy Pool Products, Inc. n’est

pas responsable des pertes d’eau, des inondations

ou des avaries causées par une installation ou un

entretien inadéquat.

The LXi heater may be installed indoors or

outdoors, as outlined in later sections. Location of

the heater below or above the pool water level affects

operation of its water pressure switch. See sections on

water piping and heater start-up for more information

about this.

Avoid placing the heater in locations where it can

cause damage by water or condensate leakage. If this

is not possible, provide a suitable drain pan to catch

and divert any leakage. The pan must not restrict the

air ﬂ ow around the heater.

All criteria given in the following sections reﬂ ect

minimum clearances as stated in the national stan-

dards. However, each installation must also be evaluat-

ed, taking into account the prevailing local conditions

such as wind speed and direction, proximity and height

of walls that may block ventilation, and proximity to

public access areas.

2.3.2 Clearances

The heater must be placed to provide clearances

on all sides for maintenance and inspection. There

must also be minimum distances maintained from

combustible surfaces. See Table 2.

At least 18" (457mm) access must be available in

front of the heater for burner removal and access to

the igniter.

If the heater is to be installed in a garage, or

Page 10 LXi

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Pool/Spa Heater Installation and Operation Manual

similar structure, all burners and burner ignition de-

vices must have a minimum 18" (457mm) clearance

above the ﬂ oor.

This heater must be installed at least 5 feet

(1.52m) from the inside wall of a pool unless the

heater is separated from the pool by a solid fence, wall

or other permanent solid barrier.

Ce chauffe-piscine doit être installé au moins 5

pieds (1.52m) de la paroi interne de la piscine à moins

d'être isolé de la piscine par une clôture, un mur ou

autre barrière permanente.

2.3.3 Flooring

The heater must be installed on a level surface

of noncombustible construction or on ﬁ re-resistant

slabs or arches. Noncombustible ﬂ ooring is deﬁ ned

as ﬂ ooring material and surface ﬁ nish not capable of

being ignited and burning and with no combustible

materials against the underside. Acceptable materials

are those consisting entirely of a combination of steel,

iron, brick, tile, concrete, slate, glass or plaster. Do not

install the heater directly on a combustible wood or

carpet ﬂ oor without placing a noncombustible platform

between the ﬂ oor and the heater.

The heater can be installed on a combustible ﬂ oor

if a noncombustible base assembly, available from

Jandy, is used. See the heater rating plate or the Parts

List (Section 11) in this manual for the appropriate

base part number. Heaters must never be installed

directly on carpeting.

As an alternative to the Jandy noncombustible

base plate, in the United States, the National Fuel Gas

Code (NFPA 54 / ANSI Z223.1), and in Canada, the

Natural Gas and Propane Installation Code (CAN/

CSA-B149.1), allow a heater to be placed on a com-

bustible surface when there is a platform under the

heater made of hollow masonry no less than 4 inches

(102 millimeters [mm]) thick, covered with sheet

metal at least 24 gauge thick and extending beyond the

full width and depth of the heater by at least 6 inches

(153 mm) in all directions. The masonry must be laid

with ends unsealed, and joints matched to provide free

circulation of air from side to side through the

masonry. (See Figure 2.) If the heater is installed in a

carpeted alcove, the entire ﬂ oor of the alcove must be

covered by a noncombustible panel.

2.3.4 Outdoor Installation

The LXi heater can be installed in the outdoor

conﬁ guration as received from the factory.

Locate the heater in an open, unroofed area. Do

not install the heater under a deck. Do not locate the

heater below or adjacent to any doors, glass openings,

louvers, grills, etc., which connect in any way with an

inhabited area of a building, even though the access

might be through another structure (e.g., a garage or

utility room). In the United States the vent system

shall terminate at least 4 ft (1.2 m) below, 4 ft (1.2 m)

Table 2. Minimum Heater Clearances From Combustible Surfaces

Table 2. Dégagements Minimaux à Assurer Entre les Parois de

L'appareil et les Constructions Combustibles

Note: Clearances listed in Table 2 are

manufacturer's tested values. These are

given as minimum values. Where local

and national codes apply, and values

are different than those listed in Table

2, use the greater value to ensure safe

operation.

* In Canada - 24 in (61cm)

Figure 2. Noncombustible Platform

Notes:

1. Blocks must provide a solid base and be braced so they

cannot slip out of place.

2. Air openings in blocks must be arranged to provide unre-

stricted opening through entire width or length of base.

3. Sheet metal must be at least 24 ga. and extend 6" beyond

the heater jacket on all sides.

SIDE OF

HEATER

INDOOR (OUTDOOR

SHELTER) INSTALLATION

OUTDOOR INSTALLTION

INCHES CENTIMETERS INCHES CENTIMETERS

BLANK 4 10.2 4 10.2

REAR 4 10.2 4 10.2

PIPING 16 40.6 16 40.6

TOP 36 99.0 OPEN UNROOFED AREA

FRONT 18* 45.7* 18* 45.7*

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Pool/Spa Heater Installation and Operation Manual Page 11

horizontally from, or 1 ft (300 mm) above any door,

operable window, or gravity inlet into any building. In

Canada, the heater must be installed so that the exhaust

point of the heater is at least ten (10) feet (3.0 m) from

any building opening. See Figure 3.

WARNING

United States

Do not install the heater with the top of the vent

assembly within 4 feet (1.22 m) horizontally, 4 feet

(1.22 m) below or less than 1 ft (300 mm) above of

any opening into a building.

Canada

Do not install the heater with the top of the vent as-

sembly within 10 feet (3.05 m) of any opening into a

building.

AVERTISSEMENT

Lorsque vous installez l’appareil de chauffage, as-

surez-vous que l’ouverture d’aération se trouve à un

minimum de 10 pieds (3.05 m) de toute ouverture

d’un bâtiment.

The top surface of the heater must be at least 3

feet above any forced air inlet, or intake ducts located

within 10 feet horizontally.

If the heater is installed under an overhang, there

must be a minimum clearance of 5 feet (1.5 m) above

the top of the heater and the structure should not over-

hang the heater more than 12 inches (0.30 m). The area

under the overhang must be open on three sides. This

prevents combustion gases from being diverted into

living areas through doors, windows, or gravity inlets.

Ne pas installer ce chauffe-piscine sous une

saillie mesurant moins de 3 pi de hauteur. La partie

sous la saillie doit être ouverte sur 3 côtés.

Figure 3. Outdoor Heater Installation

If the heater is installed close to a structure, pro-

tect it from rain water runoff with rain gutters on the

roof or other measures. Do not locate the heater near

irrigation sprinkler systems that could spray water on

it. Water from sprinklers may cause damage to controls

and electronic components.

Avoid locations where wind deﬂ ection off nearby

structures might cause downdraft conditions. Where

downdraft conditions exist, locate the heater at least 3

feet (0.91 m) from vertical surfaces (e.g., nearby build-

ings and walls).

In Florida, it is required that the heater be secure-

ly fastened to the equipment pad. Use a size

1/4" x 1-1/2" long stainless steel Tapcon

type con-

crete screws and washers at each of the four tabs

located at the base of the heater. Mounting the appli-

ance in this manner meets the applicable requirements

of the Florida Building Code.

Tapcon

is a registered trademark of Illinois Tool Works (ITW), Inc.

Mounting screws are not provided with this heat-

er. After placing the heater on the equipment pad, drill

a hole in the concrete at each of the four tabs on the

feet of the heater. (The correct size drill bit is usually

provided with the concrete screws when purchased).

Place a screw in each of the holes and fasten the heater

to the equipment pad. (See Figure 4). Do not over-

torque the screws.

Figure 4. Anchor Heater To Equipment Pad

2.3.5 Indoor and Outdoor Shelter

Installations

An outdoor shelter (Canada only) is an unoccu-

pied enclosure which does not communicate directly

with occupied areas. All indoor installations and

outdoor shelter installations require a factory approved

vent collar. The vent collar must be installed without

modiﬁ cation and in accordance with the instructions

provided by the manufacturer. For sidewall venting, a

side vent kit is available from your Jandy distributor.

Page 12 LXi

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Pool/Spa Heater Installation and Operation Manual

Une remise extérieure (au Canada seule-

ment) est un endroit inoccupé qui ne communique

pas directement avec les endroits occupés. Toutes

les installations intérieures et remises extérieures

exigent l’addition d’une cheminée approuvée par le

manufacturier. La cheminée doit être installée sans

aucune modiﬁ cation et selon les exigences fournies

par le manufacturier.

The applicable codes, standards and Jandy Pool

Products, Inc., require that the heater be properly

vented as outlined in this manual. Proper ventilation

of exhaust and combustion air are essential for the safe

and efﬁ cient operation of the heater. See Section 3.

2.3.5.1 Converting the Grill to a Vent

Collar

If the LXi heater is to be installed either indoors

or in an outdoor shelter, its exhaust discharge grill

must be removed. The LXi heater comes with the

vertical vent collar factory installed. The optional side

vent plate, gasket and screws can be ordered as a parts

kit. (See the parts list in Section 11 of this manual).

The conversion can be done quite simply as follows:

1. Remove the vent exhaust grill by removing the

four screws which retain it. The grill and the

screws may be discarded. See Figure 5.

2. Install the vent pipe on the indoor vent collar.

The collar will accommodate vent piping of nom-

inal 6”, 7” or 8” diameter (see Table 4), depend-

ing upon the model of your heater. (See Figure

6.) See vent installation section for important

information on selecting proper pipe size.

Section 3. Venting

3.1 Combustion Air Supply

The heater location must provide sufﬁ cient

air supply for proper combustion and ventilation of

the surrounding area as outlined in the latest edition

of ANSI standard Z223.1 (NFPA 54) or in Canada,

CAN/CSA-B149.1, and any local codes that may be

applicable.

In general, these requirements specify that the

room in which a heater is installed should be provided

with two permanent air supply openings; one within

12 inches (305 mm) of the ceiling, the other within 12

inches (305 mm) of the ﬂ oor. All indoor installations

must have openings to outside air for combustion,

ventilation, and dilution of ﬂ ue gases from inside the

building. See Figure 7 and Table 3. Jandy Pool Prod-

ucts, Inc., does not recommend indoor installations

that do not provide combustion air from outside the

building.

All outdoor shelter installations (Canada only)

must have uninterrupted openings to outside air for

combustion and ventilation. The installation must be

in accordance with the latest edition of CAN/CSA

B149.1. Jandy Pool Products, Inc., does not recom-

mend outdoor shelter installations that depend on

internal air for combustion. Combustion air should be

ducted to the heater from outside the structure.

Outside Air Supply: When combustion air is

supplied directly through an outside wall, each open-

ing should have a minimum free area of one square

inch per 4,000 BTU/h (1.2kW) input of the total input

rating of all appliances in the enclosed area. If air is

provided through horizontal ducts, each opening and

duct must provide one square inch of ﬂ ow area for

each 2000 BTU/h (0.6 kW). These requirements are

summarized in Table 3. Note that the areas speciﬁ ed

are net free areas and should be increased when the

openings are covered by screens, louvers, grills or oth-

er protective covers. See Figure 8 and Table 3 notes.

Note In Canada, follow Canadian Standard, CAN/

CSA-B149.1 or local codes.

Figure 6. Vent Pipe Installation

Figure 5. Removal of Outdoor Exhaust Grill

OUTDOOR

VENT GRILL

VERTICAL

VENT

COLLAR

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Pool/Spa Heater Installation and Operation Manual Page 13

WARNING

Do not store any chemicals, cleaners, or other cor-

rosive material near combustion air openings or in

the room. Avoid locating appliance vents in the vi-

cinity of combustion air openings. Failure to prevent

corrosive materials from mixing with combustion air

can result in reduced heater life and unsafe heater

operation.

AVERTISSEMENT

Ne pas entreposer ni utiliser d'essence ni d'autres

vapeurs ou liquides inﬂ ammables à proximité de cet

appareil ou de tout autre appareil.

3.2 Exhaust Venting

When converted to indoor and outdoor shelter

venting conﬁ guration, the LXi heater has a vent collar

ﬁ tting for attachment to the venting. The diameter of

the vent collar and, thus, the minimum diameter of

the vent pipe to be used is determined by the model

of heater installed and the type of venting. The only

correct procedure for vent pipe sizing is to do so in

accordance with Table 4 and the applicable installa-

tion code as stated in the following "Danger" warn-

ing. Note that with horizontal Category III type vent

installations, the venting may be smaller than the vent

collar for Category I vertical venting. See Table 4.

Table 3. Air Openings to Outside

Exhaust Fans or Vents: Any equipment

which exhausts air from the room where the heater

is installed can deplete the combustion air supply or

reverse the natural draft action of the venting system.

This could cause ﬂ ue products to accumulate in the

room. Additional air must be supplied to compensate

for such exhaust.

The information in Table 3 is not applicable in

installations where exhaust fans or blowers of any type

are used. Such installations must be designed by quali-

ﬁ ed engineers.

The heater must be completely isolated and

protected from any source of corrosive chemical fumes

such as those emitted by trichlorethylene, perchloro-

ethylene, chlorine, etc.

Notes:

1. Use approved

roof jack.

Figure 7. Indoor Installation Venting (USA), or Outdoor Shelter (Canada)

Required Net Free Open Area*

for Combustion Air Openings

*Area indicated is for one of two openings; one at ﬂ oor level and

one at the ceiling, so the total net free area would be double the

ﬁ gures indicated. For special conditions, refer to NFPA54 ANSI

Z223.1. In Canada refer to the National Standard CAN/CSA-

B149.1 which differs from this table.

Note: If using screens and/or metal louvers, compensate by adding

50% additional area to each opening. If using wood louvers each open-

ing must be at least four times the area indicated in the table above.

Model

Direct from outside Duct from outside

(cm

)in

(cm

)

250 63 (406) 126 (813)

300 75 (484) 150 (968)

400 100 (645) 200 (1290)

Page 14 LXi

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Pool/Spa Heater Installation and Operation Manual

WARNING

Vent pipe diameter must be as required by the Na-

tional fuel Gas Code Z223.1 or the Canadian Instal-

lation Codes for Gas Appliances CAN/CSA-B149.1.

Undersized pipe can result in inadequate venting

and oversize pipe can result in vent condensation.

In either case the result can be release of combus-

tion products to the indoors. This can cause serious

injury or death by carbon monoxide poisoning or

asphyxiation.

AVERTISSEMENT

Le diamètre des tuyaux de ventilation doit répondre

aux exigences du National Fuel Gas Code Z223.1

ou du code canadien des installations des appar-

eils à gaz CAN/CSA B149.1. Des tuyaux trop petits

risquent d’entraîner une ventilation inadéquate et

des tuyaux trop gros risquent de provoquer une

condensation dans les tuyaux. Dans un cas comme

dans l’autre, des produits de combustion risquent

de s’échapper dans le bâtiment et causer des bles-

sures graves ou l’asphyxie par le monoxyde de

carbone.

3.3 Vent Pipe Sizing and General

Installation

The LXi may be installed with venting as a Cat-

egory I or III Fan-Assisted appliance or outdoors with

the integral vent grill.

3.3.1 Outdoor Installations

For outdoor installations, exhaust venting con-

siderations will determine the placement of the heater

(See Section 2.3.4). If the heater cannot be placed so

as to meet the requirements stated in Section 2.3.4,

a vent collar may be added to the heater to move the

exhaust vent opening to a position that complies with

the requirements. In all cases, vent collars must be of

the same diameter as the exhaust outlet of the heater.

Approved vent collars may be obtained through your

Jandy distributor.

3.3.2 Indoor and Outdoor Shelter

Installations

All indoor installations and outdoor shelter in-

stallations require a factory approved vent collar. The

vent collar must be installed without modiﬁ cation and

the vertical vent collar comes factory installed.

All vent installations must be made in accor-

dance with all local, state or provincial codes and

with:

1. The National Fuel Gas Code, ANSI Z223.1

(NFPA 54), latest edition; pay particular at-

tention to the chapter addressing “Venting of

Equipment.” Applicable provisions of additional

applicable local building codes may also need to

be followed.

2. In Canada, CAN/CSA B149.1.

Avoid terminating heater vents near air con-

ditioning or air supply fans. The fans can pick up

exhaust ﬂ ue products from the heater and return them

inside the building, creating a possible health hazard.

Do not locate the vent terminal where ﬂ ue prod-

ucts could strike against building materials and cause

degradation.

Vent opening should be well away from trees

or other obstructions that would prevent free air ﬂ ow

to and from vent terminal. Do not terminate the vent

under decks, stairways, or car ports.

The LXi may be installed for use with standard

vertical venting per tables provided in most local

codes for Category I Fan-Assisted appliances. If the

local code does not include such tables, refer to the

National Fuel Gas Code NFPA 54 / ANSI Z223.1 or

the Canadian Natural Gas and Propane Installation

Code, CAN/CSA-B149.1. Note that the tables for

fan-assisted appliances include both maximum and

minimum vent loading ﬁ gures. The primary purpose

of the maximum ratings are to assure that the vent

operates with negative pressure throughout its length.

The minimum ratings are to assure that vent gases do

not cool too much and thereby assure that condensa-

tion does not occur.

When the installation requires horizontal venting

in excess of what is allowed for Category I installa-

tions or calls for horizontal discharge, the LXi may be

installed with a Category III venting system. Category

III applications must be installed per this installa-

tion manual and the vent manufacturer's installation

instructions. The venting materials must comply with

UL 1738 for Category III venting systems and be con-

structed of stainless steel. In Canada, the venting ma-

terials must be ULC S636 compliant. Vent piping must

be adequately supported with no low spots or sagging

that will allow condensate to collect. The heater must

not be used to support the vent pipe. Horizontal runs

Table 4. Vent Pipe Sizing Table

Heater

Size

Vent Collar Size

Minimum Vertical

Vent Pipe Diameter

(Refer to NFPA 54 or

local codes)

Horizontal Vent Pipe

Diameter

Maximum Horizontal

Vent Length

Maximum No.

of Elbows

Sidewall Vent Kit

250

6 in 15 cm 6 in 15 cm 5 in 13 cm 25 ft 7.6 m 3 R0467301

300

7 in 18 cm 7 in 18 cm 5 in 13 cm 25 ft 7.6 m 3 R0467301

400

8 in 20 cm 8 in 20 cm 6 in 15 cm 25 ft 7.6 m 3 R0467302

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Pool/Spa Heater Installation and Operation Manual Page 15

NOTE For approved side wall vent kits and speciﬁ c

installation instructions, see Section 11,

Replacement Parts.

When venting multiple appliances through one

common duct, each appliance must have its own vent

temperature limit switch. All vent limit switches must

be wired in series so as to prevent any appliance from

ﬁ ring in the event of a blocked vent. Refer to ANSI

Z223.1 or, in Canada, to CAN/CSA B149.1 for more

information on multiple venting.

3.3.3 Inspection and Replacement of

Existing Vent System with New

Components

If the LXi is being installed to replace an existing

pool heater, it is recommended that a new appropriate

venting system be installed with the new heater. How-

ever, if an existing venting system must be used, be

sure to carefully inspect the venting system to ensure

that it is in good condition and continues to be appro-

priate for the LXi heater. Replace any parts that are

not in good and serviceable condition with new parts

before completing the pool heater installation.

must be sloped upwards away from the heater to a vent

terminal at a minimum of 1/4" per horizontal foot (2

cm/m). The LXi is designed for Category III venting

with a maximum of 25 ft (7.6 m) of vent pipe and up

to 3 elbows. For each additional elbow, reduce the

maximum vent pipe length by 10 ft (3 m). See Table 4

for the minimum vent diameter for the model size to

be installed.

Side wall vents must be installed and located in

accordance with the National Fuel Gas Code NFPA

54 / ANSI Z223.1 or the Canadian Natural Gas and

Propane Installation Code CAN/CSA-B149.1. See

Figure 8 Side Wall Vent Terminations.

IMPORTANT NOTE In the Commonwealth of

Massachusetts, additional requirements,

covered in document CMR 248 5.00, which

supersede some of the requirements of

ANSI Z223.1 (NFPA 54) apply to Side Wall

Horizontally Vented appliances. If installing

this product using an approved side-wall

horizontal vent system in the Commonwealth

of Massachusetts, be sure to adhere to these

additional requirements. These requirements

include verbiage that says that the property

owner is to ensure that Carbon Monoxide

Detectors are installed in the vicinity of

the appliance and also on all levels of the

dwelling in which the appliance is installed.

For further instructions, contact Jandy Pool

Products Technical Service Department at

(707) 776-8200 extension 260.

Figure 8. Side Wall Vent Terminals

Page 16 LXi

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Pool/Spa Heater Installation and Operation Manual

Section 4. Gas Connections

4.1 Gas Supply and Piping

Review the following general instructions before

continuing the installation.

WARNING

The LXi pool and spa heaters are designed for use

with either natural gas or LP gas. Check the rating

plate on the inner panel to be sure that the heater is

designed to use the type of gas being supplied. DO

NOT ATTEMPT TO CONVERT THIS HEATER FOR

USE WITH ANY OTHER TYPE OF FUEL.

AVERTISSEMENT

Les appareils de chauffage à faibles émissions

LXi pour piscines et cuves thermales sont conçus

pour être utilisés avec du gaz naturel ou du gaz de

pétrole liquéﬁ é (GPL). Vériﬁ ez l’information inscrite

sur la plaque signalétique du panneau intérieur pour

vous assurer que l’appareil est conçu pour le type

de gaz fourni. NE PAS ESSAYER DE CONVERTIR

CET APPAREIL À UN AUTRE TYPE DE GAZ.

1. Gas piping installation must be in accordance

with the latest edition of ANSI Z223.1 and all

local codes. In Canada, the installation must be in

accordance with CAN/CSA B149.1 and all local

codes that apply.

2. Check the gas supply to be sure that it is the same

as the gas indicated on the heater's rating plate.

LXi heaters, as shipped from the factory, are set

to operate within the low altitude range. Follow

the instructions in Section 10.4.3 to adjust the

heater for high altitude.

CAUTION

Permanent damage to the gas valve will occur if the

following procedures are not followed.

ATTENTION

Vous endommagerez la soupape de gaz si vous ne

respectez pas les procédures suivantes.

3. Use the ﬁ gures in Table 5 to size the gas inlet

piping from the gas meter to the heater. Check all

local codes for compliance before installing the

heater.

Table 5. Supply Gas Pipe Size Requirements*

Distance from Gas Meter

Heater

Size

0-50 feet

(0-15 m)

50-100 feet

(15-30 m)

100-200 feet

(30-60 m)

in. mm in. mm in. mm

250 1 25 1-1/4 32 1-1/4 32

300 1-1/4 32 1-1/4 32 1-1/2 38

400 1-1/4 32 1-1/2 38 1-1/2 38

Notes:

*1. These numbers are for natural gas (0.65 Sp. Gr.) and

are based on 1/2 inch (3.45 kPa) water column pressure

drop. Check supply pressure with a manometer, and local

code requirements for variations. For LP gas, reduce

pipe diameter by one size, but maintain a minimum

3/4" diameter.

2. Check supply pressure and local code requirements before

proceeding with work.

3. Pipe ﬁ ttings must be considered when determining gas

pipe sizing.

4. Install a sediment trap (drip leg) ahead of the gas

controls. See Figure 9. Fit the trap with a thread-

ed cap which can be removed for cleaning.

5. Install a manual gas shutoff valve for service

and safety. Do not use a restrictive gas cock.

DO NOT USE FLEXIBLE GAS PIPING, it will

restrict the gas ﬂ ow to the heater.

6. Disconnect the heater and its individual shutoff

valve from the gas supply system during pressure

testing of the system at pressures higher than 1/2

pounds per square inch (psi) (3.45 kilopascals

[kPa]). If the test pressure is equal to or less than

1/2 psi (3.45 kPa), close the manual shutoff valve

on the heater during the piping pressure test.

Figure 9. Proper Design for a Sediment Trap/Drip Leg

APPROVED

LXi

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Pool/Spa Heater Installation and Operation Manual Page 17

7. If the gas supply pressure is less than required,

check for undersized pipe between the meter and

the heater, a restrictive ﬁ tting, or an undersized

gas meter. Gas supply pressures to the heater are

listed in Table 6.

Table 6. Gas Supply Pressure Requirements*

Supply Pressure Minimum Maximum

Natural Gas 5.0 inches W.C.

(1.2 kPa)

10.5 inches W.C.

(2.6 kPa)

LP Gas 11.0 inches W.C.

(2.5 kPa)

14.0 inches W.C.

(3.5 kPa)

Manifold Pressure Nominal

Natural Gas 2.5 inches W.C. (0.6 kPa)

LP Gas 9.0 inches W.C. (2.2 kPa)

NOTE The maximum inlet gas pressure must not

exceed the speciﬁ ed value. The minimum value

listed is for the purpose of input adjustment. Refer

to Table 6.

8. To connect the gas supply line to the heater’s gas

valve, make sure the steel elbow (supplied with

the manifold) is screwed into the inlet side of the

gas valve. The heater is designed so that the gas

supply line may enter through either side of the

heater. Tighten the elbow until the desired orien-

tation is achieved.

CAUTION

Do not overtighten the elbow. Over tightening will

crack the gas valve. Do not use teﬂ on tape to wrap

the elbow threads.

ATTENTION

Ne serrez pas trop le coude. Vous risqueriez de ﬁ s-

surer la soupape de gaz. N’entourez pas le ﬁ letage

des coudes de ruban à joints.

9. Before operating the heater, test the complete gas

supply system and all connections for leaks using

a soap solution. Do not use an open ﬂ ame.

CAUTION

Some leak test solutions (including soap and water)

may cause corrosion or stress cracking. Rinse the

piping with water after testing.

ATTENTION

Certaines solutions d’essai d’étanchéité (y compris

l’eau et le savon) peuvent causer de la corrosion

ou de la ﬁ ssuration. Rincez les tuyaux à l’eau après

l’essai d’étanchéité.

4.2 Manifold Pressure

Conﬁ rm that gas supply pressure is correct. If

the gas supply pressure is less than required, check

for undersized pipe between the meter and the heater,

a restrictive ﬁ tting, or an undersized gas meter. Gas

supply pressures to the heater, when it is operating, are

listed in Table 6.

CAUTION

Manifold gas pressure for the LXi natural gas heat-

ers should be set at 2.5" WC. Propane heaters

should be set to 9" WC.

ATTENTION

La pression du collecteur de pression pour les

systèmes de chauffage au gaz naturel devrait être

de 2.5'’ WC. Pour les sytèmes de chauffage au gaz

propane devrait être de 9'’ WC.

The manifold pressure may be checked by con-

necting a manometer to the pressure port on the outlet

side of the valve. The pressure will be zero when the

heater is not running. When the heater is operating the

manifold gas pressure should be 2.5" WC for natural

gas heaters and 9.0" WC for LP gas heaters.

If the manifold pressure indicated above is not

correct, check the gas train for possible problems.

Check the meter, gas line, gas ﬁ ttings, and gas shut off

for under sizing. Check the gas valve inlet for excess

pipe dope, if all is correct, then it may be necessary to

adjust the gas valve regulator. To adjust the manifold

gas pressure, ﬁ rst remove the slotted cap next to the

inlet pressure port on the inlet side of the gas valve.

Under the slotted cap is a slotted plastic screw which

increases the manifold pressure when turned clock-

wise and decreases the manifold pressure when turned

counterclockwise. After measurements, and adjust-

ments if necessary, have been made, make sure to

replace the 1/8" NPT gas valve plugs on the inlet and

manifold pressure ports, and the cap on the manifold

pressure adjustment screw. It is extremely important

to replace these parts before leaving the installation.

Failure to do so can result in damage to property or in-

jury or death. With the heater ﬁ ring, the pressure must

be within the range shown in Table 6. Also check the

pressure with the heater off.

4.3 Special Precautions for LP Gas

LP Gas is heavier than air and can therefore more

readily collect or “pool” in enclosed areas if provision

for proper ventilation is not made. Installation of pool

heaters in enclosed areas such as pits is not recom-

mended. However, if such an installation is required

be sure to pay special attention to proper ventilation

requirements for LP gas. Locate heaters a safe dis-

tance from LP gas cylinders and ﬁ lling equipment.

Consult the National Fuel Gas Code (NFPA 54 / ANSI

Z223.1, latest edition), the Natural Gas and Propane

Installation Code in Canada (CAN/CSA B149.1, latest

edition), and any other local codes and ﬁ re protection

authorities about speciﬁ c installation restrictions in

your area.

Page 18 LXi

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Pool/Spa Heater Installation and Operation Manual

Do not install any valve in the piping between the

heater outlet and the pool, unless it is being used as a

diverter valve. For special installations, such as water

connections below the water level of the pool, or for

other questions contact the Technical Service depart-

ment at 1.707.776.8200 ext. 260.

5.3 Automatic Flow Control Valve

The inlet/outlet header of the LXi heater comes

equipped with an automatic ﬂ ow control valve. The

automatic ﬂ ow control valve maintains the proper

ﬂ ow through the heater at rates up to approximately

125 Gallons Per Minute (GPM) (475 liters per minute

[LPM]). If the ﬁ lter system ﬂ ow rate is higher than

approximately 125 GPM (475 LPM), install a manual

bypass valve (see Figure 11), then perform a tempera-

ture rise test (see Section 7.8) and adjust the ﬂ ow using

the bypass valve until the proper temperature rise is

obtained.

5.4 Reversible Water Connections

The LXi heater is shipped with water connec-

tions on the right side, but can be modiﬁ ed in the ﬁ eld

to provide left-side water connections. This procedure

involves removing the heat exchanger headers and

reinstalling them on opposite ends of the tube assem-

bly. Some of the heater wiring must be disconnected

and re-routed, so this procedure must be done only by

a trained service technician. Heat exchanger reversals

are generally done before the installation of power

and water to the heater. If you need to reverse the heat

exchanger on a previously installed heater be sure that

Section 5. Water Connections

5.1 Water Piping

Figure 10 illustrates typical piping for pool

equipment in pool/spa combination pools. With its

electronic control, the LXi heater is particularly suited

for this type of pool installation.

The heater must be protected from back-siphon-

ing of water, which can result in dry starts. If there is

any chance of back-siphoning, provide a check valve

between the pool and the ﬁ lter pump inlet.

Arrangement of pool system components other

than as illustrated in these diagrams can affect the op-

eration of the heater’s water pressure switch. Location

of the heater above or below the pool water surface

can also affect operation of the switch. In general, the

pressure switch can be adjusted to accommodate this

effect if the heater water connections are no more than

six (6) feet below the pool water surface and no more

than 15 feet above it. See instructions for pressure

switch adjustment (Section 7.7) for more information

about this.

Note that when pool equipment is located below

the pool surface a leak can result in large scale water

loss or ﬂ ooding. Jandy Pool Products, Inc., cannot be

responsible for such water loss or ﬂ ooding or the dam-

age caused by either occurrence.

5.2 Check Valve Installation

Install a check valve in the plumbing between

the pool inlet and the heater if there is any chance of

back-siphoning.

AQUAPURE

Figure 10. Typical Piping Installation

LXi

™

Pool/Spa Heater Installation and Operation Manual Page 19

all electrical power, the gas supply and water supply

have been turned off before starting the procedure.

These instructions have been written to include the

steps needed when reversing the water connections on

an existing installation. If you are reversing the head-

ers on a new installation, some steps will be ignored.

Water connection reversal is illustrated in Figures 11

and 12. Proceed as follows:

1. For an existing installation, drain the heater by

removing the two drain plugs on the inlet/outlet

header and the drain plug on the return header.

2. Remove the heater front panel (door).

3. Remove the I/O header side cover plates, top and

bottom. See Figure 13.

4. Remove the return header side cover plate. See

Figure 13.

5. Disconnect the blue "HiLimit" two-pin connector

from the Power Interface board in the raceway.

Clip any wire ties attached to the harness. Feed

the "HiLimit" two-pin connector and wiring back

through the way it is routed to the header so that

the harness hangs free from the header, outside of

the cabinet.

6. Disconnect the two "WATER TEMP" tempera-

ture sensor leads from the Power Interface board

in the raceway. Clip any wire ties attached to the

harness. Pull the wires out of the cabinet so that

they hang free from the header, outside of the

cabinet.

7. Disconnect the yellow "Water Press" two-pin

connector from the Power Interface board in

the raceway. Clip any wire ties attached to the

harness. Feed the "Water Press" two-pin connec-

tor and wiring back through the way it is routed

to the water pressure switch so that the harness

hangs free from the water pressure switch, out-

side of the cabinet.

NOTE Be careful not to create any kinks in the water

pressure switch copper tubing when handling

the header.

8. For an existing installation, remove the coupling

nuts from the header and disconnect the water

supply from the heater.

9. Remove the 10 bolts and washers from the inlet/

outlet header and remove the header from the

tube assembly. Leave the spacer in place.

10. Remove the 10 bolts and washers from the return

header and remove the header from the tube as-

sembly. Leave the spacer in place.

11. For an existing installation, remove the tube

gaskets and clean the header's mating surface of

any corrosion or debris. Replace the tube gaskets

with new ones. Do not use any metal tools on the

Figure 13. LXi Panel Identiﬁ cation

I/O HEADER SIDE

COVER PLATES

TOP AND BOTTOM

SIDE

SUPPORT

RETURN

HEADER SIDE

COVER PLATE

SIDE

LEFT

REAR

PANEL

TOP

PANEL

REAR VENT

COVER

GRILL

FRONT

PANEL

(DOOR)

DOOR

SUPPORT

SIDE

SUPPORT

SIDE

RIGHT

BASE

Figure 11. Water Connections as Shipped

Figure 12. Water Connections Reversed

Page 20 LXi

™

Pool/Spa Heater Installation and Operation Manual

header surface. Scratches may compromise the

seal integrity.

12. Place the inlet/outlet header over the bolts and

gasketed tubes on the left side of the tube assem-

bly. Align the bolt and tube holes in the header

with the bolts and tubes in the header bar and

slide the assembly together. Make sure the spacer

is in place.

13. Thread on the 10 bolts and washers and hand

tighten.

14. Place the return header over the bolts and gasket-

ed tubes on the right side of the tube assembly.

Align the bolt and tube holes in the header with

the bolts and tubes in the header bar and slide

the assembly together. Make sure the spacer is in

place.

15. Thread on the 10 bolts and washers and hand

tighten.

16. Use a torque wrench to tighten the bolts on each

header to four (4) foot-pounds. The bolts must be

tightened in the sequence indicated in Figure 14.

CAUTION

Failure to tighten the header as indicated in step 16

may cause the header to leak or become perma-

nently damaged from warping.

ATTENTION

Si le tuyau collecteur n’est pas serré conformément

aux directives des l'étape 16, il risque d’avoir des

fuites ou de s’endommager de façon permanente.

17. Remove the 3/4 inch button plug located in the

left side panel below the inlet/outlet header and

replace with the 3/4 inch wire grommet from

the right side panel below the return header. The

high limit leads were routed through this grom-

met prior to removal in step 5. Install the 3/4

inch plug in the opening where the 3/4 inch wire

grommet was removed.

18. Route the blue two-pin connector attached to

the high limit switches back to the Power Inter-

face board in the raceway. Reconnect the blue

“HiLimit” two-pin connector to the blue “HiLim-

it” connector on the Power Interface board.

19. Route the wires that attach to the temperature

sensor back to the Power Interface board in the

raceway. Reconnect the wires to the “WATER

TEMP” terminals on the Power Interface board.

20. Route the yellow two-pin connector that connects

to the water pressure switch back to the Power

Interface board in the raceway. Reconnect the

yellow two-pin connector to the yellow “Water

Press” connector on the Power Interface board.

21. Use plastic wire ties to refasten the temperature

sensor, high limit switch and water pressure

switch wires to each other. Bundle the wires near

the control panel and fasten them with a wire tie.

NOTE Be sure that none of the wires are in contact

with a sharp edge or a hot surface.

22. Install the return header side cover plate on the

right side of the unit.

23. Install the I/O header side cover plates, top and

bottom on the left side of the unit.

24. Replace the front panel (door).

5.5 Connections at Heater

The LXi heater has a standard 2" water header

and coupling design. With this feature, only nomi-

nal two inch PVC or CPVC may be connected to the

heater. However, by installing the appropriate pipe

adapters and two short pieces of two inch plastic pipe

(supplied by the installer), any size existing pipe may

be ﬁ tted to the heater.

The LXi heater also comes with a Jandy Sweep

Elbow for increased hydraulic performance and ef-

ﬁ ciency. The sweep elbow also provides the advantage

of its exclusive interface with the Jandy AquaLink

temperature sensor.

To install the Jandy Sweep Elbow follow these

instructions:

WARNING

To avoid an electrical shock hazard, which can result

in serious injury or death, ensure that all electrical

power to the system is turned off before approaching,

inspecting or troubleshooting any leaking valves

or plumbing that may have caused other electrical

devices in the surrounding area to get wet.

Figure 14. Header Bolt Tightening Sequence

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