Jandy LJ User manual

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.
H0248900E
InstallationandOperationData
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’sinstructions.
• 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.
To the Installer: After installation, these instructions must be given to the homeowner or left on or
near the heater.
To the User: This booklet contains important information that will help you in operating and
maintaining this heater. Please retain it for future reference.
Installation and
Operation Manual
Lite2 Pool and Spa
Heater
Model LJ
Natural Gas or LP Gas
NOTE: LP Gas For
Outdoor Use Only
This product is manufactured under the
following listed United States patents:
3,446,566 - 4,461,274 - 4,421,270 -
5,117,233 - 5,163,508 -
Other patents pending

TABLEOFCONTENTS
SECTION1. GeneralInformation
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 ........................... 2
1.6 MaterialsInstallerMustProvide ............ 3
1.6.1 MaterialsforAllApplications .................3
1.6.2 Materials for Special Applications ......... 3
1.7 Specifications ....................................... 3
1.7.1 General Specifications ......................... 3
1.7.2 Dimensions .......................................... 4
SECTION2. InstallationInstructions
2.1 Introduction ...........................................4
2.2 Field Assembly ..................................... 4
2.3 Location Requirements ........................ 5
2.3.1 Introduction ...........................................5
2.3.2 Clearances........................................... 6
2.3.3 Flooring................................................. 6
2.3.4 OutdoorInstallation...............................7
2.3.5 Indoor and Outdoor Shelter
Installation............................................. 8
SECTION3. Venting
3.1 Combustion Air Supply ......................... 8
3.2 Vent Pipe Sizing and General
Installation............................................. 9
3.2.1 OutdoorInstallations............................. 9
3.2.2 Indoor and Outdoor Shelter
Installations...........................................9
SECTION4. GasConnections
4.1 Gas Supply and Piping ......................... 10
4.2 ManifoldPressure................................. 12
4.3 Special Precautions for
Propane Gas ........................................ 12
SECTION5. WaterConnections
5.1 Water Piping.........................................12
5.2 CheckValveInstallation........................ 13
5.3 Automatic Flow Control Valve............... 13
5.4 Reversible Water Connections ............13
5.5 Connections at Heater..........................16
5.6 Pressure Relief Valve ........................... 16
5.7 Auxiliary Components, Chlorinators,
Ozone Generators, and
Sanitizing Chemicals............................ 16
SECTION6. Electrical
6.1 GeneralInformation .............................. 17
6.2 MainPower........................................... 17
Wiring Diagram ....................................18
6.3 Bonding ................................................19
6.4 Pump Power Connection .....................20
SECTION7. OperatingInstructions
7.1 Start-Up ..............................................20
7.2 Setting the LJ Controller
Functions and Limits ..........................21
7.2.1 Setting the Real Time Clock...............22
7.2.2 Setting the Temperature Scale...........22
7.2.3 Setting Pool and Spa Temperatures .. 22
7.2.4 Setting the Freeze Temperature ........ 23
7.2.5 Setting the Internal Pump Time Clock.24
7.3 Lighting and Shutdown Procedures....24
7.4 Heater/ControllerOperation................24
7.4.1 Normal Operation ............................... 26
7.4.2 Pump Operation .................................26
7.4.2.1 Pump Operation in "External Time
Clock"Mode ....................................... 26
7.4.2.2 Pump Operation in "Internal Time
Clock"Mode ....................................... 27
7.4.3 Locking/UnlockingtheKeypad............27
7.5 Remote Control Operation ................. 27
7.5.1 Remote Control Connected At Fireman
Switch Terminal Block........................ 27
7.5.2 Remote Control Connected At The
Heater's Control Panel ....................... 28
7.6 Water Pressure Switch Adjustment ... 28
7.7 Temperature Rise .............................. 29
7.8 Adjustingthe ManualBypass Valve .... 30

SECTION8. Maintenance
8.1 Water Chemistry ................................ 31
8.2 Seasonal Care....................................31
8.2.1 Spring and Fall Operation...................31
8.2.2 Winterizing .........................................31
8.2.3 Spring Start-up ...................................32
8.3 Inspection and Service ....................... 32
8.3.1 Owner Inspection ............................... 33
8.3.2 Professional Inspection ......................33
SECTION9. Troubleshooting
9.1 GeneralHeaterTroubleshooting......... 34
9.2 LJ Controller Service Codes...............34
9.2.1 Explanation of Error Codes ................ 34
9.2.2 Resetting the LJ Controller
Service Codes.................................... 35
SECTION10. ProfessionalMaintenance
andService
10.1 GeneralInformation ............................ 38
10.2 Natural-Draft Combustion System .....38
10.3 Heater Components and
Their Operation...................................39
10.4 Electrical Troubleshooting .................. 41
10.4.1 Electrical Power Supply......................41
10.4.2 Controller............................................ 41
10.4.3 Control Circuit Troubleshooting ..........41
10.4.3.1 Transformer .......................................41
10.4.3.2 Fuse ...................................................42
10.4.3.3 Fireman Switch and
ExternalInterlocks .............................. 42
10.4.3.4 FusibleLink ........................................ 42
10.4.3.5 Limit Switches .................................... 42
10.4.3.6 Water Pressure Switch ......................42
10.4.3.7 GasValveVoltage .............................. 43
10.4.3.8 Igniter/IgnitionControl ......................... 43
SECTION11. ReplacementParts
11.1 OrderingInformation........................... 44
11.2 Parts List ............................................ 44
11.3 GeneralExplodedView.......................46
11.4 DetailedExplodedView ......................47
Warranty............................. Back Cover
TABLEOF CONTENTS (cont'd)

Model LJ Pool and Spa Heater Page1
SECTION 1.
General Information
1.1 Introduction
This manual provides installation and operation
instructions for the Lite2 Model LJ pool and spa
heaters. Read these installation and operation instruc-
tions completely before proceeding with the installa-
tion. 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 Lite2 LJ heater gets electrical power from
an external 115VAC or 230VAC source and provides
a dual electronic thermostat control system for pool/
spa combinations or preheat convenience.
The Lite2 LJ heater is specifically designed for
heating fresh water swimming pools and spas. Do not
use it as a general service water heater. There is a
specially designed model of Lite2 for heating salt
water pools. Consult your dealer for the appropriate
Jandy products for these applications.
1.2 Consumer Information and Safety
The Lite2 pool/spa heater is 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
foryoungchildren.
2. The drinking of alcoholic beverages before or
during spa or hot tub use can cause drowsiness
which could lead to unconsciousness, and
subsequentlyresultindrowning.
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.
Hyperthermia occurs when the internal body
temperature reaches a level several degrees above the
normal body temperature of 98.6°F (37°C). Symptoms
includedizziness,fainting,drowsiness,lethargy,andan
increase in the internal body temperature. The effects
of hyperthermiainclude:

Page2
• Lack of awareness of impending hazard
• Failure to perceive heat
• Failure to recognize need to leave spa
• Physicalinability toleave 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-
ficingcomfort.
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°
(2C°) , 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 Keypad Lock
function to discourage further adjustments.
4. Set the pump time clock to start the pump no
earlier 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 filter systems.
1.3 Warranty
The Lite2 heater is sold with a limited factory
warranty. Details are specified on the back cover of
thismanual.
Make all warranty claims to an authorized Jandy
representative or directly to the factory. Claims must
include the heater serial number and model (this
information can be found on the rating plate), installa-
tion date, and name of the installer. Shipping costs are
not included in the warranty coverage.
The warranty does not cover damage caused by
improperassembly,installation,operationorfield
modification. Also, damage to the heat exchanger by
corrosive water is NOT covered by the warranty. See
Section 8.1 for maintaining proper pool water chemis-
try.
NOTE: Keep this manual in a safe place for
future reference when inspecting or servicing
the heater.
1.4 Codes and Standards
The Lite2 pool and spa heater is design certified
by CSA (Canadian Standards Association) as comply-
ing with the latest edition of the "Standard for Gas
Fired Pool Heaters", ANSI Z21.56 in the USA and
CSA-4.7 in Canada.
All Jandy heaters must be installed in accordance
with the local building and installation codes as per the
utilityorauthoritieshavingjurisdiction.Alllocalcodes
take precedence over national codes.
In the absence of local codes, refer to the latest
editionofthefollowingnationalcodesforinstallation:
1. In the United States, "The National Fuel and Gas
Code", ANSI Z223.1. Pay special attention to the
Chaptercovering,"VentingofEquipment".
2. In Canada, "Natural Gas and Propane Installation
Code", CAN/CSA-B149.1.
Any changes to the heater, gas controls, gas
orifices, wiring, draft hood, vent cap, 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 local
Jandy distributor with any questions or problems
involvingthespecifications,installation,andoperation
of your Jandy equipment. An experienced technical
support staff is ready to assist you in assuring the
proper performance and application of Jandy products.
For technical support call the Jandy Products Techni-
cal Service Department at [phone] extension
260.

Model LJ Pool and Spa Heater Page3
1.6 MaterialsInstallerMust Provide
1.6.1 Materials for All Applications
The following items are needed and are to be
supplied by the installer for all Lite2 heater installa-
tions:
1. The correct size gas pipe to supply gas from the
meter to the heater (see Section 4.1 for correct
gas pipe size).
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 union to the heater (see
Section 4.1).
5. A 115V AC or 230V AC power supply. A
junction box is not needed at the heater, connec-
tions are made inside of the heater jacket.
1.6.2 Materials for Special Applications
Inadditionto the items listedabove,the following
items are needed for special applications.
1. A factory authorized draft hood and any vent
pipe needed for indoor installations in the USA
and outdoor shelter installations in Canada (see
Section 3.2.2). Draft hoods are available from
anyJandydistributor.
2. Primer and cement suitable for cementing CPVC
pipe to PVC pipe and an appropriate coupling for
connecting the factory supplied CPVC pipe
nipplestoPVCpoolplumbing.
3. Anoncombustibleplatformforinstallationon
combustible surfaces (see Section 2.3.3). Non-
combustible bases are available from your Jandy
distributor.
4. A factory approved vent cap for all outdoor
installations where wind conditions may cause
downdrafting. Approved vent caps are available
from your Jandy distributor. See Section 11.2,
"Parts List", of this manual for the correct part
number.
5. Electrical relay (Jandy part number R0658100) if
pump is to be run by the heater's internal time
clock.
1.7 Specifications
1.7.1 General Specifications
1. InstallationLocation.
Certified for use:
In the USA:
NaturalGas: Indoor and Outdoor
Propane Gas: OutdoorOnly
In Canada:
NaturalGas: Outdoor and Outdoor
Shelter
Propane Gas: OutdoorOnly
2. MinimumClearanceFromCombustibleMaterial:
See Table 2 in Section 2.3.2
3. *Gas Pipe/Heater Gas Valve Connection.
Natural and LP: 3/4" NPT
*For diameter of gas line from meter to heater see
Table 4 in Section 4.1.
4. Supply Gas Type.
Certified for use with:
Natural Gas and Liquefied Petroleum Gas (LP
Gas or Propane Gas).
5. Inlet Gas Supply Pressure.
Minimum Maximum
Natural Gas: 5.5 "WC 10.0"WC
LP Gas: 10.0"WC 14.0"WC
6. Water Pipe/Heater Connection†.
Threaded Unthreaded
Iron Pipe 2" NPT 1 1/2"*
Copper Pipe 1 1/2"* or 2"
Plastic 2" NPT** 2"
† Connections shown here are common sizes. Other sizes
may be connected (see Section 5.5 for details).
* Unthreaded 1 1/2" pipe may be used with special
seals not included with this heater.
** Threaded 2" CPVC nipples are supplied with the
heater for connecting 2" PVC pipe.
7. FlowRate:
Maximum: 125gpm (475 lpm)
Minimum: 30 gpm (110 lpm)
8. Maximum Working Water Pressure: 75psi
9. Exhaust Vent Connection Size: See Figure 1 in
Section 1.7.2
10. ElectricalSupply: Either 115 volts AC or 230
volts AC.

Page4
11. Modification of Heater for High Altitude:
The Jandy Lite 2 model LJ heater is normally
shipped from the factory in the low altitude (sea
level)operational configuration.Whenrequested,
the heaters can be configured and shipped for
higher altitudes. For field conversions to change
altitudeconfigurations,manifoldkitsformid
altitudes and high altitudes are available from
your Jandy pool products dealer or by contacting
the Customer Service Department at (707) 776-
8200 extension 245. See Section 11, “Parts List”,
of this manual for the correct kit number for the
manifold assembly needed for your altitude.
Table 1 defines the altitude designations 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 Alti-
tudes", CAN 1-2.17 in Canada.
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
intérieures, comme mesure de sécurité
additionnelle, Jandy Pool Products, Inc.
recommande fortement l’installation de
détecteurs de monoxyde de carbone près de
cet appareil ainsi que dans les espaces
adjacents occupés.
2.1 Introduction
Install the Lite2 heaters, vent caps and draft
hoods in accordance with the procedures in this
manual, local codes and ordinances, and in accor-
dance with the latest edition of the appropriate na-
tional code (see Section 1.4 "Codes and Standards").
All gas-fired products require correct installation
to assure safe operation. The requirements for pool
heatersincludethefollowing:
1. Fieldassembly (ifrequired)
2. Appropriate site location (clearances) and
flooring
3. Sufficientcombustionandventilationair
4. Properly sized gas meter and piping
5. Proper electrical wiring (if required)
6. Adequate water flow
This manual provides the information needed to
meet these requirements. Review all application and
installationprocedurescompletelybeforecontinuing
theinstallation.
2.2 Field Assembly
The Lite2 heater is shipped from the factory
withthe top assembly inthe low-profile configuration
for outdoor installation. The Lite2 heater is design
certifiedfor indoor installation whenequipped with a
drafthood,which must be installedwithoutmodifica-
tion. The Lite2 heater is also certified for installation
in an outdoor shelter in Canada when equipped with a
draft hood. An outdoor shelter is an enclosure not
normally occupied which does not communicate
directly with occupied areas.
Check the rating plate on the heater or the Parts
List (Section 11) of this manual for the correct Jandy
draft hood or vent cap part number. See instructions
supplied with the draft hood or vent cap for installation
and attachment. When the draft hood is used, locate
the heater so as to be in the same atmospheric
pressure zone as the combustion air inlet to the heater.
1.7.2 Dimensions
See Figure 1 for a diagram showing the heater's
exteriordimensions and dimensions tocriticalconnec-
tions on the heater.
SECTION 2.
Installation Instructions
WARNING
Improper installation or maintenance can cause
nausea or asphyxiation from carbon monoxide
in flue 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 Carbon Monoxide detectors in the
vicinity of this appliance and in any adjacent
occupied spaces.
Table 1. Altitude Designations for the LJ Pool Heater
NATURAL GAS
ALTITUDE
DESIGNATION UNITED STATES CANADA
LOW ALTITUDE 0-3000 FT 0-2000 FT
(0-610 m)
MID ALTITUDE
(H) 3001-6000 FT 2001-4500 FT (611-1370 m)
HIGH ALTITUDE
(J) 6001-10,000 FT NOT APPLICABLE
LP
LOW ALTITUDE 0-5000 FT 0-4500 FT
(0-1370 m)
HIGH ALTITUDE
(H) 5001-10,000 FT NOT APPLICABLE

Model LJ Pool and Spa Heater Page5
Figure1.GeneralConfiguration
* Ratings shown are for both natural and propane gas.
Venting Dimensions
Model Firing Rate / Hr.*
Heater U.S. Indoor or
Width Vent U.S. Outdoor CAN Outdoor (1,000's)
Dim"W" Diameter Dim"H" ShelterDim"H"
in (cm) in (cm) in (cm) in (cm) BTU (kcal)
LJ125 15 (38) 5 (13) 17 3/8 (44) 16 1/4 (41) 125 (32)
LJ175 18 (46) 6 (15) 18 (46) 24 1/8 (61) 175 (44)
LJ250 22 1/2 (57) 7 (18) 18 1/4 (47) 25 1/4 (64) 250 (63)
LJ325 26 3/4 (68) 8 (20) 18 7/8 (48) 26 1/2 (67) 325 (82)
LJ400 31 3/4 (81) 9 (23) 21 1/2 (55) 27 1/2 (70) 400 (101)
2.3 Location Requirements
2.3.1 Introduction
Caution
When pool equipment is located below the pool
surface, a leak from any component can cause
large scale water loss or flooding. Jandy Pool
Products, Inc. cannot be responsible for such
water loss or flooding 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.

Page6
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 flow around the heater.
All criteria given in the following sections reflect
minimum clearances as stated in the national stan-
dards. However, each installation must also be evalu-
ated,taking intoaccountthe prevailinglocal conditions
such as wind speed and direction, proximity and height
of walls that may block ventilation or cause
downdrafts, 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 20" (500mm) access must be available in
front of the heater for burner removal.
If the heater is to be installed in a garage, or
similarstructure,all burnersandburnerignition
devices must have a minimum 18" (457mm) clearance
above the floor.
This heater must be installed at least 5 feet (1.3
meters) from the inside wall of the pool or spa unless
the heater is separated from the pool or spa by a 5 foot
high solid fence, wall or other permanent barrier.
Ce chauffe-piscine doit être installé á 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 fire-resistant
slabs or arches. Noncombustible flooring is defined as
flooring material and surface finish not capable of
beingignitedandburningandwithnocombustible
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
carpetfloorwithout placinga noncombustibleplatform
between the floor and the heater.
The heater can be installed on a combustible
floorifa noncombustible base assembly, available
from Jandy, is used. See the heater rating plate or the
Parts List (Section 11) of this manual for the appropri-
ate 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 allows a heater to be placed on a combustible
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 floor of the alcove must be covered
bya noncombustiblepanel.
Table 2. Minimum Heater Clearances From Combustible Surfaces Note: Clearances listed inTable 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.
*Referstosideoppositepiping
**Aclosetwithnodoor
(InUS-18in(46cm)clearance,
InCanada-24in(61cm)clearance)
SIDE OF
HEATER INDOOR (OUTDOOR SHELTER) INSTALLATION OUTDOOR INSTALLATION
INCHES CENTIMETERS INCHES CENTIMETERS
BLANK* 6 15 6 15
REAR615615
PIPING 12 30 12 30
TOP 44 110 OPEN UNROOFED AREA
FRONT ALCOVE** ALCOVE** ALCOVE** ALCOVE**
Figure2. NoncombustiblePlatform
Notes:
1. Blocks must provide solid base and be braced so they
cannot slip out of place.
2. Air openings in blocks must be arranged to provide
unrestricted opening through entire width or length of
base.

Model LJ Pool and Spa Heater Page7
2.3.4 Outdoor Installation
Lite2 heaters can be installed in the low-profile
configuration as received from the factory, or with an
optional factory approved vent cap for high wind
applications.
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,glassopenings,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 there must be a minimum of four (4)
feet (1.22 m) horizontally or four (4) feet (1.22 m)
vertically between the heater exhaust point and any
door,glass opening,or gravityinlettoabuilding. 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 and
4 feet (1.22 m) vertically of any opening into a
building.
Canada
Do not install the heater with the top of the vent
assembly within 10 feet (3.05 m) of any
openingintoa building.
AVERTISSEMENT
Lorsque vous installez l’appareil de chauffage,
assurez-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
three (3) feet above any forced air inlet, or intake
ducts located within ten (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
overhang the heater more than 12 inches (0.30m). The
area under the overhang must be open on three sides.
This prevents combustion gases from being diverted
intoliving areasthrough doors,windows,orgravity
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.
If the heater is installed close to a structure,
protect 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 deflection 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
buildings and walls). The addition of a vent cap may be
necessary.
In Florida it is required that the heater be se-
curely fastened to the equipment pad. Use a size 1/4"
x 1-1/2" long stainless steel Tapcon®type concrete
screw and washer at each of the four tabs located at
the base of the heater. Mounting the applicance in this
manner meets the applicable requirements of the
FloridaBuildingCode.
Mounting screws are not provided with this
heater. 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 and washer in each of the
holes and fasten the heater to the equipment pad (see
Figure 4). Do not over torque the screws.
Figure4. AnchorHeaterto Equipment Pad.
Figure3. OutdoorHeaterInstallation

Page8
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 the addition of a
factory approved draft hood. The draft hood must be
installedwithoutmodification andinaccordancewith
the instructions provided by the manufacturer.
Une remise extérieure (au Canada seulement)
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 coupe-tirage intérieur approuvée par
le manufacturier. La coupe-tirage intérieur doit être
installée sans aucune modification et selon les
exigences fournies par le manufacturier.
The applicable installation 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 efficient operation of the heater (See
Section 3).
SECTION 3.
Venting
3.1 Combustion Air Supply
The heater location must provide sufficient air
Notes:
1. An Underwriters' Laboratories listed vent cap is required to prevent downdraft and allow the heater to function properly
and safely.
2. Use approved roof jack.
Figure5. IndoorInstallationVenting(USA),or OutdoorShelter(Canada)
Table 3. Air Openings to Outside
Required Net Free Open Area*
for Combustion Air Openings
Direct from outside Duct from outside
Model in2(cm2)in
2(cm2)
125 32 (206) 64 (413)
175 44 (284) 88 (568)
250 63 (406) 126 (813)
325 82 (429) 164 (1058)
400 100 (645) 200 (1290)
*Area indicated is for one of two openings; one at floor level
and one at the ceiling, so the total net free area would be double
the figures 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 opening must be at least four times
the area indicated in the table above.
supply for proper combustion and ventilation of the
surrounding area as outlined in the latest edition of
ANSI standard Z223.1 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
in. (305mm) of the ceiling, the other within 12 in.
(305mm)of the floor. Allindoor installations musthave
openingstooutsideairforcombustion,ventilation,and
dilution of flue gases from inside the building (see
Figure 5 and Table 3). Jandy Pool Products, Inc. does

Model LJ Pool and Spa Heater Page9
notrecommend indoorinstallations thatdonot provide
combustionairfromoutsidethebuilding.
Alloutdoorshelterinstallations(Canada only)
must have uninterrupted openings to outside air for
combustionandventilation.Theinstallationmustbein
accordance with the latest edition of CAN/CSA
B149.1. Jandy Pool Products, Inc. does not recom-
mend outdoor shelter installations that depend on
internalair for combustion. Combustionair should be
ducted to the heater from outside the structure.
Outside Air Supply: When combustion air is
supplieddirectlythroughanoutside wall,eachopening
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 flow area for each 2000
BTU/h (0.6 kW). These requirements are summarized
in Table 3. Note that the areas specified are net free
areas and should be increased when the openings are
covered by screens, louvers, grills or other protective
covers (see Figure 5 and Table 3 notes).
NOTE: In Canada, follow Canadian Standard,
CAN/CSA-B149.1 or local codes.
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 flue 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
qualifiedengineers.
The heater must be completely isolated and
protected from any source of corrosive chemical
fumes such as those emitted by trichlorethylene,
perchloroethylene,chlorine,etc.
WARNING
Do not store any chemicals, cleaners, or other
corrosive material near combustion air
openings or in the room. Avoid locating dryer
vents in the vicinity 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
N’entreposer aucun produit chimique, produit
nettoyant ou produit corrosif à proximité des
bouches d’air de combustion ou dans la pièce.
Éviter de placer des tuyaux de ventilation pour
sécheuse à proximité des bouches d’air de
combustion. Le fait de laisser des matières
corrosives se mélanger à l’air de combustion
risque de réduire le cycle de vie de l’appareil de
chauffage et de compromettre son
fonctionnement.
3.2 Vent Pipe Sizing and General
Installation
3.2.1 Outdoor Installations
Foroutdoorinstallations,exhaustventingconsid-
erations 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 pipe and cap may be added to the heater to move
the exhaust vent opening to a position that complies
with the requirements. When the heater is installed in
areas of high wind or when unavoidably installed near
a vertical obstruction where downdrafting may occur,
it may be desirable to add a vent cap directly to the top
of the heater. In all cases, vent pipes and caps must be
of the same diameter as the exhaust outlet of the
heater. Approved vent caps may be obtained through
yourJandydistributor.
3.2.2 Indoor and Outdoor Shelter
Installations
WARNING
Vent pipe diameter must be as required by the
National Fuel Gas Code Z223.1 or the
Canadian Installation Codes for Gas Appliances
CAN/CSA-B149.1. Undersize pipe can result in
inadequate venting and oversize pipe can result
in vent condensation. In either case the result
can be release of combustion 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 Appareils à Gaz CAN/CSA-
B149.1. Des tuyaux trop petits risquent
d’entraîneruneventilation inadéquateet 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 blessures graves ou
l’asphyxie par le monoxyde de carbone.
Allindoorinstallationsandoutdoorshelter
installations require the addition of a factory approved

Page10
draft hood. The draft hood must be installed without
modification.
All vent installations must be made in accordance
with all local, state or provincial codes and with:
1. Chapter covering, " Venting of Equipment" of
the National Fuel Gas Code, ANSI 223.1 latest
edition,or theapplicableprovisions ofthe local
buildingcodes.
2. In Canada, CAN/CSA-B149.1.
Avoid long horizontal runs of the vent pipe, and
90° elbows, reductions and restrictions. Horizontal runs
should have at least a 1/4 inch rise per foot (20mm
per meter) in the direction of flow.
Avoid terminating heater vents near air condition-
ing or air supply fans. The fans can pick up exhaust
flue products from the heater and return them inside
the building, creating a possible health hazard.
Do not locate the vent terminal where flue
productscouldstrike againstbuildingmaterialsand
cause degradation.
Vent opening should be well away from trees or
other obstructions that would prevent free air flow to
and from vent terminal. Do not terminate the vent
under decks, stairways, or car ports.
Be sure to support all venting so that connections
will not separate and so that the weight of the vent
pipe does not rest on the heater draft hood. All con-
nections should be made with rustproof sheet metal
screws. Do not weld or fasten the vent pipe to the
heater draft hood. The draft hood and heater top must
be easily removable for normal heater service and
inspection.
The draft hood outlet is to be connected to an
unobstructed vent pipe of the same diameter, terminat-
ing outside the building. The vent must terminate at
least two (2) feet (0.6 m) above the highest point of
the roof or other object that is within ten (10) feet (3.0
m) of the vent termination. The vent pipe must have a
listed vent cap which allows a full equivalent opening
for flue products (see Figure 5). The top of the vent
cap must be at least five feet in vertical height above
the draft hood outlet.
Type “B” double wall or equivalent vent pipe is
recommended. However, single wall metal vent pipe
may be used as specified in the latest edition of the
National Fuel Gas Code ANSI Z223.1 or in Canada
CAN/CSA-B149.1
IMPORTANT NOTE: Do not use sheet metal
screws at the snap lock joints of Type B gas
vents.
Whenventingmultipleappliancesthroughone
common duct, each appliance must have it’s own
exhaust vent temperature limit switch. All vent
temperature limit switches must be wired in series so
as to prevent all appliances from firing in the event
that any vent opening becomes blocked. Refer to
ANSI Z223.1 in the United states or CAN/CSA-
B149.1formoreinformationonmultipleventing.
3.2.3 Inspection and Replacement of
Existing Vent Systems with New
Components
If the Lite2 is being installed to replace an
existing pool heater, it is recommended that a new
appropriate venting system be installed with the new
heater. However, 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 appropriate for the Lite2 heater.
Replace any parts that are not in good and serviceable
condition with new parts before completing the pool
heaterinstallation.
SECTION 4.
Gas Connections
4.1 Gas Supply and Piping
Review the following general instructions before
continuingtheinstallation.
WARNING
The Jandy Lite2 model LJ 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 Jandy Lite2 modèle
LJ pour piscines et cuves thermales sont
conçus pour être utilisés avec du gaz naturel
ou du gaz de pétrole liquéfié (GPL). Vérifiez
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

Model LJ Pool and Spa Heater Page11
Figure 6. The proper design for a sediment trap / drip leg
plate. Jandy Lite2 LJ heaters, as shipped from
the factory, are certified to operate within the
altitude range indicated on the rating plate. If a
field conversion to a different altitude range
should be necessary, manifold kits are available
for changing the altitude range of the heater. See
Table 1 in section 1.7.1 of this manual to deter-
mine the correct altitude designation for your
heater. Refer to Section 11 “Parts List” to order
the correct part number of the manifold kit
needed. When changing the altitude range of the
heater, be sure to fill out the altitude conversion
label, included in the kit. Apply the label on the
inner panel of the heater, next to the original
rating plate.
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 figures in Table 4 to size the gas inlet
piping from the gas meter to the heater. Check
alllocal codes for compliancebefore installing
the heater.
Table 4. Natural Gas Pipe Size Requirements
Distance from Gas Meter
0-50 feet 50-100 feet 100-200 feet
Heater (0-15 m) (15-30 m) (30-60 m)
Size in. (mm) in. (mm) in. (mm)
125 3/4 (19) 1 (25) 1 (25)
175 1 (25) 1 (25) 1-1/4 (32)
250 1 (25) 1-1/4 (32) 1-1/4 (32)
325 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. Thesenumbersarefornaturalgas(0.65Sp.Gr.) and are
based on 1/2 inch (13mm) water column pressure drop.
Checksupplypressurewithamanometer,andlocalcode
requirements for variations. For liquefied petroleum gas,
reduce pipe diameter one size, but maintain a 3/4 inch
(19mm) minimum diameter.
2. Check supply pressure and local code requirements
before proceeding with work.
3. Pipe fittings must be considered when determining gas
pipe sizing.
Supply Pressure Minimum Maximum
Natural Gas 5.5 Inches WC 10.0 Inches WC
(1.4 kPa) (2.5 kPa)
LP Gas 10.0 Inches WC 14.0 Inches WC
(2.5 kPa) (3.5 kPa)
Manifold Pressure Nominal
Natural Gas 4.0 Inches WC (1.0 kPa)
LP Gas 9.0 Inches WC (2.2 kPa)
Table 5. Gas Supply Pressure Requirements
4. Install a sediment trap (drip leg) ahead of the gas
controls (see Figure 6). Fit the trap with a
threaded 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 flow 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.
7. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the heater, a restrictive fitting, or an undersized
gas meter. Gas supply pressures to the heater
are listed in Table 5.
NOTE: The maximum inlet gas pressure must
not exceed the specified value. The minimum
value listed is for the purpose of input
adjustment. Refer to Table 5.
8. Before operating the heater, test the complete
gas supply system and all connections for leaks
using a soap solution. Do not use an open flame.

Page12
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 fissuration. Rincez les
tuyaux à l’eau après l’essai d’étanchéité.
4.2 Manifold Pressure
Confirm 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 fitting, or an undersized gas meter. Gas
supply pressures to the heater, when it is operating,
are listed in Table 5. CAUTION
Manifold gas pressure for the Lite2 LJ natural
gas heaters should be set at 4" 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 4'’ WC. Pour les sytèmes de chauffage
au gaz propane devrait être de 9'’ WC.
The manifold pressure may be checked by
connecting a manometer to the pressure port on the
outlet side of the valve. You will need to remove the
1/8" NPT protective plug from the port and install the
appropriate 1/8" NPT fitting to connect your manom-
eter. The pressure will be zero when the heater is not
running. When the heater is operating the manifold gas
pressure should be 4.0" WC for natural gas heaters
and 9.0" WC for LP gas heaters.
To adjust the manifold gas pressure, first remove
the slotted cap on the top of the gas valve to the right
of the control knob. Under the slotted cap is a slotted
plastic screw which increases the manifold pressure
when turned clockwise and decreases the manifold
pressure when turned counterclockwise.
After measurements, and adjustments if neces-
sary, have been made, make sure to replace the 1/8"
NPT plug on the 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 injury or death.
With the heater firing, the pressure must be
within the range shown in Table 5. Also check the
pressure with the heater off.
4.3 Special Precautions for Propane Gas
LP Gas is heavier than air and can therefore
more readily collect or “pool” in enclosed areas if
provisionforproper ventilationis notmade.Installation
of pool heaters in enclosed areas such as pits is not
recommended. However, if such an installation is
required be sure to pay special attention to proper
ventilation for LP gas. Locate heaters a safe distance
Note: When using metal pipe as heat sink, join metal and PVC/CPVC, using metal male and PVC/CPVC female connection.
Figure7.Typicalinstallation

Model LJ Pool and Spa Heater Page13
from LP gas cylinders and filling equipment. Consult
the National Fuel Gas Code (NFPA 54 / ANSI
Z223.1, latest edition), the Natural Gas Installation
Code in Canada (CAN/CSA-B149.1, latest edition),
and any other local codes and fire protection authori-
ties about specific installation restrictions in your area.
SECTION 5.
Water Connections
5.1 Water Piping
Figure7illustratestypicalpipingforpoolequip-
mentinpool/spacombinationpools.
Fornormalinstallations, donot installashutoff
valve or any kind of variable restriction in the water
piping between the heater outlet and the pool/spa. In
special installations where a shut-off valve, diverter
valve or other variable restriction is required in the
plumbing between the heater outlet and the pool, Jandy
Pool Products, Inc. recommends the installation of a
pressure relief valve on the heater (see Section 5.6).
Arrangement of pool system components other
than as illustrated in these diagrams can affect the
operation 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 connec-
tions are no more than six feet below the pool water
surface and no more than 15 feet above it. See
instructions for pressure switch adjustment (Section
7.6) in the heater start-up section of this manual for
moreinformationaboutthis.
Note that when pool equipment is located below
the pool surface a leak can result in large scale water
loss or flooding. Jandy Pool Products, Inc. cannot be
responsible for such water loss or flooding or the
damage caused by either occurrence.
For special installations such as water connec-
tions below the water level of the pool, or for other
questions contact the Jandy Technical Service depart-
ment at [phone] ext 260.
5.2 Check Valve Installation
The heater must be protected from back-
siphoning 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 filter pump inlet.
When an automatic chemical feeder is installed
in the plumbing, it must be installed downstream of the
heater (see Section 5.7). A check valve must be
installed between the heater and the chemical feeder
to prevent back-siphoning of chemically saturated
water into the heater where it will damage the compo-
nents.
Figure 8. Heat exchanger reversal
5.3 Automatic Flow Control Valve
The inlet/outlet header of the Lite2 comes
equipped with an automatic flow control valve. The
automatic flow control valve maintains the proper flow
through the heater at rates up to approximately 125
Gallons Per Minute (GPM) (475 liters per minute
[LPM]). If the filter system flow rate is higher than
approximately 125 GPM (475 LPM), install a manual
bypass valve (see Figure 7), then perform a tempera-
ture rise test (see Section 7.7) and adjust the flow
using the bypass valve until the proper temperature
rise is obtained.
5.4 Reversible Water Connections
Jandy Pool Products, Inc. ships the Lite2 heater
with the water connections on the right side. The Lite2
heater can be installed with the water connections on
either side. It could be necessary, or helpful, to switch

Page14
7. Tag and disconnect the white wire on the
pressure switch (PS) and the white wire from the
fusiblelink.
8. Remove plastic tie wraps and pull the white
wires out of the front compartment through the
vestibule cover and coil them on the heat
exchanger.
9. Unscrew the brass compression fitting securing
the pressure switch to the inlet/outlet header.
Remove tube from header and gently bend it out
the connections to the left side to improve access for
installationandservice. Performthismodification
before installing the heater using the following proce-
dures:
1. Remove heater door.
2. Remove all 8 hex-head screws fastening the top
and lift the top assembly straight up (see Figure
8).
3. Remove rain shield assembly and set it aside.
4. Remove screws that fasten the gap closures to
the jacket and put them aside. Remove gap
closures.
5. Remove the screws securing the two flue
collector hold down clamps and remove the
clamps (see Figure 9). Remove flue collector.
6. Remove the three rubber jacket/plug grommets
and drain plugs (see Figure 8). One is located
under the water connections on the right side.
The other two are on the left side of the heater.
Figure 9. Flue collector hold-down brackets Figure 11. Vestibule covers
Figure 12. Heat exchanger and end baffles
Figure 10. Temperature sensing bulb
of the way.
10. Loosen the screw securing the temperature sensing
bulb retainer bracket. Slide the retainer bracket off
the bulb flange and remove the bulb from the
header (see Figure 10). Pull pressure switch tube
through the hole in the vestibule cover and into the
vestibule(controls compartment),thenpullthe
thermostat bulb assembly through same hole (see
Figure11).
11. When removing the heat exchanger from the

Model LJ Pool and Spa Heater Page15
heater (sizes 125,175 and 250 only), the end
baffles of the heat exchanger must be removed.
There are two baffles covering part of the front
and rear tubes of the heat exchanger. Each
baffle is held in place by two screws which
mount to the top of the combustion chamber wall.
Remove the screws and the baffles before
attempting to lift the heat exchanger out of the
heater (see Figure 12).
CAUTION
The heat exchanger is heavy. It may be
necessary to have help lifting the heat
exchanger out and replacing it.
ATTENTION
L’échangeur de chaleur est lourd.Il peut être
nécessaire d’avoir besoin d’aide pour enlever et
remplacer l’échangeur de chaleur.
12. Lift the heat exchanger assembly out of the
heater. Reinstall heat exchanger 180 degrees
(inlet/outletheaderleft)fromit'soriginalposition.
13. After replacing the heat exchanger into the
heater, the end baffles must be replaced. Each
one is held in place by two screws which mount
to the top of the combustion chamber wall.
Reinstall the baffles on the front and rear of the
heat exchanger before continuing with the
"Reversible Water Connections" procedure.
14. Remove pressure switch retainer (plastic cable
clamp) from the inner panel (allow pressure
switch to float).
15. Reroute pressure switch tube and thermostat
bulb assembly through hole in left side of vesti-
bule cover in reverse order. Relocate the pres-
sure switch tube and temperature sensor through
the open side of the vestibule.
16. Reinstall the temperature sensing bulb in the
header, and fasten it with the retainer bracket
and screw.
17. Reinstall the compression fitting at the end of the
pressure switch tube into inlet/outlet header and
tightenthefitting.
18. Route the white wiring from the high limit
switches beside the heat exchanger and down to
theoriginal locationfollowing thepressureswitch
tubing. Secure white wires to the pressure switch
tube with plastic wire ties.
19. Connect the white wire labeled PS to the pres-
sure switch and the other white wire to its
originallocationonthefusiblelink.
20. Reinstall the drain plugs and tighten securely.
Replace jacket/plug grommets.
21. Install the flue collector assembly. Be sure the
front and rear panels of the flue collector are
installed into the grooves on the front and rear
combustion chamber heat shield panels. Be sure
the sheet metal panels are not pinching any
wires.
22. Attach the flue collector hold down clamps to the
clips located under the two center header bolts.
23. Replace the gap closures and tighten the screws
securely. Be sure to replace the insulation,
completely covering the temperature sensor.
Insulation must be a minimum of 1" thick.
24. Double-check to make sure the wiring is not
pinched against sharp edges, or resting on the
flue collector assembly.
25. Reinstallrainshieldassembly.
26. Replace the top assembly. Make sure the tabs
Figure13.Pipinginstallation

Page16
are outside the heater jacket. Fasten the top
assembly with the hex-head screws.
27. Install plastic tie wraps on wiring in the vestibule
(controls compartment).
28. Install heater door.
5.5 Connections at Heater
The heater has 2" NPT universal header cou-
plings. You can connect threaded 2" NPT iron pipe or
unthreaded 2" copper pipe using the seals included
with this heater (see Figure 13). Unthreaded 1 1/2"
iron or copper pipe may be used with special seals
available from your Jandy distributor. However, by
installing the appropriate pipe adapters, other sizes
may also be used.
Plastic piping (PVC Schedule 40) can be con-
nected to the heater if local codes allow it, by using the
CPVC nipples included with your heater.
Toinstall plasticpiping(see Figure14):
1. Remove CPVC nipples from plastic bag.
2. Screw CPVC nipples into metal flange until tight,
using Teflon® tape on plastic threads.
3. Prepare the end of the pipe with the proper
adapter, PVC/CPVC primer and glue. Follow the
manufacturer’s instructions provided with the
primer and glue for preparation procedures and
curingtimes.
5.6 Pressure Relief Valve
A pressure relief valve (PRV) is recommended
inallinstallationsandismandatoryinanyinstallationin
which the water flow can be shut off between the
heater outlet and the pool/spa.
A pressure relief valve is not supplied with the
heater. However, it may be required by local codes.
The pressure rating of the valve should be at or below
the lowest working pressure of any component in the
filter system. Any pressure relief valve installed must
comply with provisions of the Standard described in
ANSI Z21.22 for the United States, or CAN1-4.4 in
Canada.
To install a pressure relief valve, do the following:
1. Remove the 3/4 inch (19 mm) brass plug located
on the top of the inlet/outlet header (see Figure
14).
2. Install the pressure relief valve in the threaded
hole from which the plug was removed.
3. Be sure that the exhaust port of the PRV is
plumbed so that any hot water is directed safely
away from any public areas and away from any
area occupied during servicing.
5.7 Auxiliary Components, Chlorinators,
Ozone Generators, and Sanitizing
Chemicals
The Lite2 heater is manufactured with materials
that are not compatible with high concentrations of
ozone,chlorine,bromine,orothersanitizingchemicals.
Heater damage caused by excessive chemicals or
improper ozonization is not covered by the Jandy Pool
Products, Inc. warranty. Be sure to adhere to the
following:
• When ozone is injected upstream of the heater,
install an offgas mixing chamber, or an ozone
bypass system between the heater and the ozone
injector to prevent ozone and air from entering
the heater.
• When chemical feeders are used, plumb the
feeder downstream of the heater and install an
in-line check valve between the heater and the
feeder (a minimum of 18" is required between
the heater and the check valve).
Figure14.Plasticpipingconnections
Figure 15. Thermometer and pressure relief valve

Model LJ Pool and Spa Heater Page17
• Never deposit chemicals directly in the pool
skimmer.
SECTION 6.
Electrical
WARNING
ELECTRICAL SHOCK HAZARD. This heater
contains wiring that carries high voltage.
Contact with these wires may result in severe
injury or death.
AVERTISSEMENT
POSSIBILITÉ DE CHOCS ÉLECTRIQUES. Ce
système de chauffage contient du filage de
haut voltage. Un contact avec ces fils peut
résulter en des blessures sérieuses ou la mort.
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Verify proper operation after servicing.
ATTENTION
Au moment de l'entretien des commandes,
étiquetez tous les fils avant de les débrancher.
Des erreurs de câblage peuvent entraîner un
fonctionnementinadéquatetdangereux.
6.1 GeneralInformation
Wiring connections must be made exactly as
shown in the wiring diagram found on the inside of the
heater (see Figure 16A) . The heater must include a
definite means of grounding. There is a bonding lug on
the right side of the heater, where a bond wire must be
attached.
The LJ heater controller has a built-in time clock
to run the pump, so an external time clock is not
needed. To utilize the internal time clock, instead of an
external time clock, the power for the pump must be
wired through the heater. A separate relay must be
added to correctly wire the power to the pump. The
relay may be purchased from your local Jandy distribu-
tor. Jandy Pool Products, Inc. recommends the use of
Jandy part number R0658100 because it is supplied
with the wire harness that is needed to connect the
relay to the power circuit board.
6.2 Main Power
Electrical wiring must be in accordance with the
latest edition of the National Electric Code (NEC),
ANSI/National Fire Protection Association (NFPA)
70, unless local code requirements indicate otherwise.
The heater comes factory-wired intended for
use with 230 Volt, 60 Hz AC field electrical
supply. To use 115 Volt, 60 Hz AC requires a
different wiring configuration for the pump. This
must be done by a certified electrician only, as with all
wiring. To wire the heater and pump for 115V, 60 Hz
AC, follow the alternate 115V wiring method depicted
in Figure 16. The ends of the power conversion plug
are color coded. The blue end of the plug is intended
for use with a 230 VAC power supply and the white
end of the plug is intended to be used with a 115 VAC
power supply. The power conversion plug on the
power circuit board (see Figure 16) must be removed
from the board, the orange tape must be removed from
the white end of the plug, and then the white end
inserted into the receptacle on the power circuit board.
This will convert all power in the heater to 115 VAC.
To wire the Lite2 model LJ heater to a 115 V or
230 V / 60 Hertz (Hz) electrical source:
1. Be sure that the power supply to the heater is
off.
2. Remove the door of the heater.
3. Remove the screws that hold the cover to the
power connection box located in the upper right
corner of the heater. Remove the cover.
4. Check the power conversion plug to be sure that
the correct side is plugged into the power circuit
board to match the voltage supplied to the heater.
Each side of the plug is labeled accordingly.
NOTE: The blue side of the power conversion
plug is used for 230V and the white side is used
for 115 V.
5. The heater is shipped with test wires connected
to the “Power In” terminals on the power circuit
board. They are black and red and emerge from
the heater through a hole on the right side.
Before connecting the power source, remove
these wires and discard them.
NOTE: As an alternate method for connecting
the power you may do the following:
When connecting 230 VAC, match the wire
colors from the power supply to the wire colors
of the test wires. Connect the wires using wire
nuts. When connecting 115 VAC, connect the
black wire of the power supply to the black test
wire on the side of the heater and connect the
white wire of the power supply to the red test
wire. Use wire nuts to secure the connections.
6. Run the wires from the power source through the
hole on the right side of the heater. Connect the
wires to the "Power In" terminals on the power
circuit board. The connection will be made inside
the heater and enclosed in the power connection