Installation and Operation Data
WARNING
FOR YOUR SAFETY - This product must be installed and serviced by a contractor who is licensed
and qualifi ed in pool equipment by the jurisdiction in which the product will be installed where such
state or local requirements exists. In the event no such state or local requirement exists, the installer
or maintainer must be a professional with suffi cient experience in pool equipment installation and
maintenance so that all of the instructions in this manual can be followed exactly. Before installing this
product, read and follow all warning notices and instructions that accompany this product. Failure to
follow warning notices and instructions may result in property damage, personal injury, or death.
Improper installation and/or operation can create carbon monoxide gas and fl ue gases which can
cause serious injury, property damage, or death. For indoor installations, as an additional measure of
safety, Zodiac Pool Systems, Inc. strongly recommends installation of suitable Carbon Monoxide
detectors in the vicinity of this appliance and in any adjacent occupied spaces. Improper installation
and/or operation will void the warranty.
Installation and
Operation Manual
Legacy
™
Pool and Spa Heater
Model LRZ Millivolt
Natural Gas and LP
NOTE: LP Gas for
Outdoor Use only
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.
H0299600D
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Table of Contents
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 ...............................6
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 ........ 8
2.1 Introduction ..............................................8
2.2 Field Assembly .......................................8
2.3 Location Requirements ...........................8
2.3.1 Introduction ................................8
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
Section 3. Venting....................................12
3.1 Combustion Air Supply ............................12
3.2 Vent Pipe Sizing and General
Installation ..............................................13
3.2.1 Outdoor Installations ..................13
3.2.2 Indoor and Outdoor Shelter
Installations ................................ 13
3.2.3 Inspection and Replacement of
Existing Vent System with New
Components .............................. 14
Section 5. Water Connections ................ 16
5.1 Water Piping ............................................16
5.2 Check Valve Installation ..........................17
5.3 Automatic Flow Control Valve .................17
5.4 Reversible Water Connections ................17
5.5 Connections at Heater .............................19
5.6 Pressure Relief Valve ..............................19
5.7 Auxiliary Components, Chlorinators,
Ozone Generators, and Sanitizing
Chemicals ................................................20
Section 6. Electrical................................. 21
6.1 Main Power .............................................21
6.2 Bonding ...................................................21
6.3 Auxiliary Time Clock Wiring .....................21
Section 7. Operating Instructions .......... 23
7.1 Normal Operation ....................................23
7.2 Start-Up ...................................................23
7.3 Lighting and Shutdown Procedures ........24
7.4 Turning the Heater On/Off and
Setting the Temperature Control .............24
7.5 Adjusting the Water Pressure Switch ......26
7.6 Temperature Rise ....................................27
Section 8. Maintenance ........................... 28
8.1 Water Chemistry ......................................28
8.2 Seasonal Care .........................................28
8.2.1 Spring and Fall Operation ..........28
8.2.2 Winterizing .................................28
8.2.3 Spring Start-up ...........................29
8.3 Inspection and Service ............................29
8.3.1 Owner Inspection .......................29
8.3.2 Professional Inspection ..............30
Section 9. Troubleshooting .................... 31
9.1 General Heater Troubleshooting .............31
Section 4. Gas Connections ................... 14
4.1 Gas Supply and Piping ............................14
4.2 Manifold Pressure ...................................15
4.3 Special Precautions for LP Gas ..............16
Page 4
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Table of Contents (Continued)
Section 10. Professional Maintenance
and Service ........................... 33
10.1 General Information .................................33
10.2 Natural-Draft Combustion System ...........33
10.3 Heater Components and Their
Operation .................................................33
10.4 Electrical Troubleshooting .......................34
10.4.1 Gas Valve ...................................34
10.4.2 Pilot Generator ...........................36
10.4.3 Fusible Link ................................36
10.4.4 Fireman Switch and External
Interlocks ....................................36
10.4.5 Limit Switches ............................36
10.4.6 Water Pressure Switch...............37
10.4.7 Temperature Control Circuit .......37
10.4.7.1 ON/OFF Toggle Switch ........37
10.4.7.2 Variable Temperature
Control ................................37
10.4.7.3 Temperature Sensor ............38
10.4.7.4 Temperature Control Circuit
Board ................................... 38
Section 11. Replacement Parts .............. 38
11.1 Ordering Information ...............................38
11.2 Parts List .................................................39
11.3 General Exploded View ...........................41
11.4 Detailed Exploded View ..........................42
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Section 1. General Information
1.1 Introduction
This manual provides installation and operation
instructions for the Legacy Model LRZ millivolt pool
and spa heater. Read these installation and operation instructions completely before proceeding with
the installation. Consult Zodiac Pool Systems, Inc., 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 Legacy model LRZ millivolt heater is a self
contained standing pilot unit and requires no external
power.
The Legacy heater is specifi cally designed for
heating fresh water swimming pools and spas, and
with proper installation and care, they will provide
years of reliable service. Do not use the heater to
maintain pool or spa water temperature below 70°F.
Do not use it as a heating boiler or general service
water heater or to heat salt water. Consult your dealer
for the appropriate Jandy products for these applications.
NOTE “Fresh water swimming pools and spas”
include systems that utilize saltwater chlorine
generator units, such as the Jandy AquaPure
Electronic Chlorine Generator. Please ensure
that the salt content of the pool/spa does not
exceed 4000 ppm and water fl ow rate is within
30-125 gpm (110-475 lpm).
1.2 Consumer Information and Safety
The Legacy 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 and cautions are identifi ed by
the "
of the warnings and cautions.
" symbol. Be sure to read and comply with all
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.
Page 5
WARNING
The U.S. Consumer Product Safety Commission
warns that elevated water temperature can be hazardous. Consult heater operation and installation
instructions for water temperature guidelines before
setting temperature.
AVERTISSEMENT
La U.S. Consumer Product Safety Commission
indique que des températures de l'eau élevées peuvent être dangereuses. Voir la notice d'installation
et de fonctionnement pour le réglage de la température.
1. Spa or hot tub water temperature should never
exceed 104°F (40°C). One hundred degrees
Fahrenheit (100°F [38°C]) is considered safe for
a healthy adult. Special caution is recommended
for young children.
2. The drinking of alcoholic beverages before or
during spa or hot tub use can cause drowsiness
which could lead to unconsciousness, and subsequently result in drowning.
3. Pregnant women take note! Soaking in water
above 102°F (38.5°C) can cause fetal damage
during the 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.
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
effects of hyperthermia include:
• Lack of awareness of impending hazard
Page 6
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
• 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
Zodiac Pool Systems, Inc. offers the following
recommendations to help conserve fuel and minimize
the cost of operating your pool heater without sacrifi cing comfort.
1. The American Red Cross recommends a
maximum water temperature of 78°F (25°C).
Use an accurate pool thermometer. A difference
of 4°F (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 temper-
ature control and use the TEMP-LOK feature 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.
1.3 Warranty
The Legacy heater is sold with a limited factory
warranty. Details are specifi ed on the back cover of
this manual.
Make all warranty claims to a Jandy dealer or
directly to the factory. Claims must include the heater
serial number and model (this information 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 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 Legacy pool and spa heaters are design
certifi ed by CSA (Canadian Standards Association) as
complying 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:
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
desired temperature 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
landscaping, 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. 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 Installation Code", CAN/CSA-B149.1.
Any changes to the heater, gas controls, gas
orifi ces, 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 Zodiac Pool Systems, Inc. or your local
Jandy distributor with any questions or problems
involving the specifi cations, installation, and opera-
tion 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 Technical Service
Department at (800) 822-7933.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 7
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 Legacy 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).
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 draft hood and vent pipe
for indoor installations in the USA and outdoor
shelter installations in Canada (see Section
3.2.2). Draft hoods are 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).
Noncombustible bases are available from your
Jandy distributor.
4. A factory approved vent cap for all outdoor
installations where wind conditions may cause
downdrafting. Vent caps 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
*
4. Supply Gas Type:
Certifi ed for use with:
Natural Gas or Liquefi ed Petroleum Gas (LP
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:
*2" Unthreaded PVC or CPVC
*
7. Water Flow Rate:
Maximum: 125 gpm (475 lpm)
Minimum: 30 gpm (110 lpm)
8. Working Water Pressure:
Maximum: 75 psi
9. Exhaust Vent Connection Size: See Figure 1 in
10. Electrical Supply: None (the Legacy LRZ milli-
For diameter of gas line from meter to heater see Table 4 in
Section 4.1.
Gas or Propane Gas).
Other size pipes may be used. See Section 5.5 for details
Section 1.7.2, "Dimensions".
volt heater is a millivolt heater with a standing
pilot ignition).
11. Modifi cation of Heater for High Altitude:
The Legacy model LRZ millivolt heater is
normally shipped from the factory in the low
altitude (sea level) operational confi guration.
When requested, the heaters can be confi gured
and shipped for higher altitudes. For fi eld conver-
sions to change altitude confi gurations, manifold
kits for mid altitudes and high altitudes are avail-
Page 8
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
able from your Jandy dealer or by contacting the
Customer Service Department at (800) 822-7933.
See Section 11, “Parts List”, of this manual for
the correct kit number for the manifold assembly needed for your altitude. Table 1 defi nes
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 Altitudes", CAN
1-2.17 in Canada.
Table 1. Altitude Designations For The Legacy Heater
NATURAL GAS
ALTITUDE
DESIGNATION
LOW ALTITUDE 0-3000 FT 0-2000 FT
MID ALTITUDE 3001-6000 FT 2001-4500 FT
HIGH ALTITUDE 6001-10,000 FT NOT
LOW ALTITUDE 0-5000 FT 0-4500 FT
HIGH ALTITUDE 5001-10,000 FT NOT
UNITED
STATES
LP
CANADA
(0-610 m)
(611-1370 M)
APPLICABLE
(0-1370 M)
APPLICABLE
1.7.2 Dimensions
See Figure 1 for a diagram showing the heater's
exterior dimensions and dimensions to critical connections on the heater.
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, Zodiac Pool Systems, Inc.
strongly recommends installation of suitable Carbon
Monoxide detectors in the vicinity of this appliance
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 intérieures, comme
mesure de sécurité additionnelle, Zodiac Pool
Systems, Inc. recommande fortement l’installation
de détecteurs de monoxyde de carbone près de
cet appareil ainsi que dans les espaces adjacents
occupés.
Install the Legacy heaters, vent caps and drafthoods in accordance with the procedures in this
manual, local codes and ordinances, and in accordance
with the latest edition 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 oor-
ing
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 Legacy heater is shipped from the factory
with the top assembly in the low-profi le confi guration
for outdoor installation. The Legacy heater is design
certifi ed for indoor installation (U.S. only) when
equipped with a draft hood, which must be installed
without modifi cation.
The Legacy heater is also certifi ed for installa-
tion 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.
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 fl ooding. Zodiac Pool Systems,
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. Zodiac Pool Systems, Inc. n’est
pas responsable des pertes d’eau, des inondations
ou des avaries causées par une installation ou un
entretien inadéquat.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 9
A
41"
39 3/8"
Heater Width
Model
125 15⅛ 38 6 15184624⅛ 61 125,000 32
175 18⅛ 40 6 15184624⅛ 61 175,000 44
250 22¾ 58 7 18 18¼ 47 25¼ 64 250,000 63
325 26⅞ 68 8 20 18⅞ 48 26½ 67 325,000 82
400 32⅜ 82 9 23 21½ 55 27½ 70 399,000 101
Dim "A"
in. cm in. cm in. cm in. cm BTU/HR kcal/HR
Vent Diameter
7 5/8"
13 1/8"
2 3/4"
Venting Dimensions
U.S. Outdoor
Dimension "H"
16"
5"
U.S. Indoor or
CAN Outdoor Shelter
Dimension "H"
10 3/8"
H
8"
28 1/2"
Firing Rate
Figure 1. General Confi guration
The Legacy 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
standards. However, each installation must also be
evaluated, 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 inches (457mm) access must be available in front of the heater for burner removal.
If the heater is to be installed in a garage, or
similar structure, all burners and burner ignition devices must have a minimum 18 inches (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.
Page 10
Table 2. Minimum Heater Clearances From Combustible Surfaces
Table 2. Dégagements Minimaux à Assurer Entre les Parois de
SIDE OF
HEATER
BLANK 8 20 8 20
REAR 6 15 6 15
PIPING 14 35.6 14 35.6
TOP 44 112 OPEN UNROOFED AREA
FRONT 18* 45.7* 18* 45.7*
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
L'appareil et les Constructions Combustibles
INDOOR (OUTDOOR
SHELTER) INSTALLATION
INCHES CENTIMETERS INCHES CENTIMETERS
OUTDOOR INSTALLATION
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 Zodiac Pool Systems, Inc. is used. See the
heater rating plate or the Parts List (Section 11) of 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
combustible surface when there is a platform under
the heater made of hollow masonry no less than four
(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 six (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
Legacy heaters can be installed in the low-profi le
top confi guration as received from the factory, or with
an optional high wind vent cap.
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 build-
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)
Sheet Metal Min.
Thickness 24 Ga
Hollow Concrete Block
Platform (In Canada - Two
continuous courses of
90mm (4 in.) thick hollow
masonry units.)
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 unrestricted 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.
Figure 2. Noncombustible Platform
ing, 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 gravity inlet to a 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).
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 11
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 opening into a
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 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 (0.30 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 5 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 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
buildings and walls). The addition of a vent cap may
be necessary.
In Florida, it is required that the heater be securely fastened to the equipment pad. Use a size
1/4" x 1-1/2" long stainless steel Tapcon® type
concrete screws and washers at each of the four tabs
located at the base of the heater. Mounting the appliance in this manner meets the applicable requirements
of the Florida Building Code.
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 in each of the holes and
fasten the heater to the equipment pad (see Figure 4).
Do not over torque the screws.
2.3.5 Indoor and Outdoor Shelter
Installations
An outdoor shelter (Canada only) is an unoccupied 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.
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 cheminée approuvée par le
manufacturier. La cheminée doit être installée sans
aucune modifi cation et selon les exigences fournies
par le manufacturier.
These codes, standards and Zodiac Pool Systems,
Inc. require that the heater be properly vented as
outlined in this manual. Proper ventilation of exhaust
Figure 3. Outdoor Heater Installation
Figure 4. Anchor Heater To Equipment Pad
Page 12
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
and combustion air are essential for the safe and
effi cient operation of the heater (See Section 3). An
approved draft hood may be purchased from your local
Jandy distributor. See Section 11 (Parts List) of this
manual for the correct part number for your model and
size heater.
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 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
Table 3. Air Openings to Outside
Required Net Free Open Area*
for Combustion Air Openings
Model
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 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.
Direct from outside Duct from outside
2
in
cm
2
2
in
cm
2
with two permanent air supply openings; one within
12 inches (305mm) of the ceiling, the other within
12 inches (305mm) of the fl oor. All indoor installa-
tions must have openings to outside air for combustion, ventilation, and dilution of fl ue gases from inside
the building (see Figure 5 and Table 3). Zodiac Pool
Systems, 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. Zodiac Pool Systems, Inc. does not
recommend 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
opening 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 by
50 percent when the openings are covered by screens,
louvers, grills or other protective covers (see Figure 5
and Table 3).
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 fl ue products to accumulate in the
Notes:
1. Use approved
roof jack.
Figure 5. Indoor Installation Venting (USA), or Outdoor Shelter (Canada)
3)
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 13
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 qualifi ed engineers.
If a blower or fan is used to supply air to the
room, the installer should make sure it does not create
drafts which could cause nuisance shutdowns of the
pilot.
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
3.2.2 Indoor and Outdoor Shelter
Installations
WARNING
Vent pipe diameter must be as required by the National fuel Gas Code ANSI Z223.1 or the Canadian
Installation Codes for Gas Appliances CAN/CSAB149.1. 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 ANSI
Z223.1 ou du code canadien des installations des
appareils 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 blessures graves ou l’asphyxie par le monoxyde de carbone.
All indoor installations and outdoor shelter
installations require the addition of a factory approved
draft hood. The draft hood must be installed without
modifi cation.
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 the applicable provisions of the local
building codes.
3.2.1 Outdoor Installations
For outdoor installations, exhaust venting considerations 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
your Jandy distributor.
2. In Canada, CAN/CSA-B149.1.
Avoid long horizontal runs of the vent pipe, and
90° elbows, reductions and restrictions. Horizontal
runs must have at least a 1/4 inch rise per foot (20mm
per meter) in the direction of fl ow.
Avoid terminating heater vents near air conditioning 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
products 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.
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
connections should be made with rustproof sheet metal
screws. Do not weld or fasten the vent pipe to the
Page 14
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
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, terminating outside the building. The vent must terminate
at least two (2) feet (0.61 m) above the highest point
of the roof or other object that is within 10 feet (3.05
m) of the vent termination. The vent pipe must have a
listed vent cap which allows a full equivalent opening
for fl ue products (see Figure 5). The top of the vent
cap must be at least fi ve feet in vertical height above
the draft hood outlet.
Type “B” double wall or equivalent vent pipe is
recommended for the entire venting system. However,
single wall metal vent pipe may be used within the
structure 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.
When venting multiple appliances through one
common duct, each appliance must have it’s 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.
3.2.3 Inspection and Replacement of
Existing Vent System with New
Components
If the Legacy 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 Legacy heater. Replace any parts
that are not in good and serviceable condition with
new parts before completing the pool heater installa-
tion.
Section 4. Gas Connections
4.1 Gas Supply and Piping
Review the following general instructions before
continuing the installation.
Important:
The Legacy 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.
Do not install LP gas units indoors.
WARNING
AVERTISSEMENT
Les appareils de chauffage à faibles émissions
Legacy 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. Legacy heaters, as shipped from the
factory, are certifi ed to operate within the altitude
range indicated on the rating plate. If a fi eld
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 determine 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 fi ll out the altitude conversion label, included
in the kit. Apply the label 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 fi gures in Table 4 to size the gas inlet
piping from the gas meter to the heater. Check all
local codes for compliance before installing the
heater.
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 fl ow to the heater.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 15
APPROVED
Figure 6. Proper Design for a Sediment Trap/Drip Leg
Table 4. Supply Gas Pipe Size Requirements*
Distance from Gas Meter
Heater
Size
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
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.
0-50 feet
(0-15 m)
in. mm in. mm in. mm
50-100 feet
(15-30 m)
100-200 feet
(30-60 m)
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 5.
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 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 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 5.
CAUTION
Manifold gas pressure for the Legacy natural gas
heaters should be set at 4.0" WC. Propane heaters
should be set to 9" WC.
Table 5. Gas Supply Pressure Requirements
Supply Pressure Minimum Maximum
Natural Gas 5.5 inches W.C.
(1.4 kPa)
LP Gas 10.0 inches W.C.
(2.5kPa)
Manifold Pressure Nominal
Natural Gas 4.0 inches W.C. (1.0 kPa)
LP Gas 9.0 inches W.C. (2.2 kPa)
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.
10.0 inches W.C.
(2.5 kPa)
14.0 inches W.C.
(3.5 kPa)
ATTENTION
La pression du collecteur de pression pour les
systèmes de chauffage au gaz naturel devrait être
de 4.0'’ 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 form the port and install the
appropriate 1/8" NPT fi tting 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.
Before adjusting the manifold gas pressure check
the supply side pressure. Make certain the entire
supply side gas train (gas line, shutoffs, meter, etc.)is
correct for the heater size. To adjust the manifold gas
pressure, fi rst remove the slotted cap on the top of the
gas valve to the right of the control knob. Under the
Page 16
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
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 necessary, 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 fi ring, the pressure must be
within the range shown in Table 5. 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 recommended. However, if such an installation is required
be sure to pay special attention to proper ventilation
requirements for LP gas. Locate heaters a safe distance
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.
Section 5. Water Connections
5.1 Water Piping
Figure 7 illustrates typical piping for pool equip-
ment in pool/spa combination pools.
For normal installations, do not install a shutoff
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,
Zodiac Pool Systems, 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 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 7.5) in the heater
start-up section of this manual 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. Zodiac Pool Systems, Inc. cannot
be responsible for such water loss or fl ooding or the
damage caused by it.
For special installations such as water connections below the water level of the pool, or for other
questions contact the Zodiac Technical Service department at (800) 822-7933.
Figure 7. Typical Piping Installation
AQUAPURE
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
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 fi lter 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 components.
5.3 Automatic Flow Control Valve
The inlet/outlet header of the Legacy 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 7), then perform a temperature rise test (see Section 7.6) and adjust the fl ow using
the bypass valve until the proper temperature rise is
obtained.
5.4 Reversible Water Connections
NOTE Reversing the header requires a longer
syphon tube, order part number R0483601.
The Legacy heater is shipped with water connections 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
assembly. 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 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 headers on a new installation, some steps will be
ignored. Water connection reversal is illustrated in
Figures 8 and 9. 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 10.
4. Remove the return header side cover plates, top
and bottom. See Figure 10.
Figure 8. Water Connections as Shipped
NOTE: When reversal
is complete the water
temperature sensor
wires and the syphon
loop tube will exit the
inlet/outlet header at
the back of the heater
and the drain plugs are
facing down.
Figure 9. Water Connections Reversed
RETURN HEADER SIDE
COVER PLATES
TOP AND BOTTOM
LEFT SIDE PANEL
CONTROL PANEL
FRONT PANEL
(DOOR)
Figure 10. Legacy Panel Identifi cation
Bypass
Assembly
VENT TOP
BASE
TOP PANEL
Page 17
REAR PANEL
IN/OUT HEADER
SIDE COVER PLATES
TOP AND BOTTOM
RIGHT SIDE PANEL
Page 18
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
5. Tag and disconnect the white wire on the
pressure switch (PS) and the white wire on the
Fireman's switch terminal which leads to the high
limit switch.
6. Remove the water temperature sensor nut from
the inlet/outlet header and remove the sensor.
7. Tag and disconnect the black and white wires
from the water pressure switch.
CAUTION
In order to prevent property damage or injury, ensure that the wiring is handled and routed carefully
so as not to cause any damage to it. Additionally, be
careful not to create any kinks in the water pressure
switch copper tubing when handling the header.
ATTENTION
Afi n d'empêcher des dégâts matériels ou des bles-
sures, assurez-vous que le câblage est manipulé
et installé soigneusement de manière à ne pas
l’endommager. De plus, vous devez faire attention
à ne créer aucune imperfection dans la conduite en
cuivre de l’interrupteur de pression d'eau en manipulant la tête.
8. For an existing installation, remove the coupling
nuts from the header and disconnect the water
supply from the heater.
9. Remove the ten (10) bolts and washers from the
inlet/outlet header and remove the header from
the tube assembly.
10. Remove the ten (10) bolts and washers from the
return header and remove the header from the
tube assembly.
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
header surface. Scratches may compromise the
seal integrity.
15. Thread on the ten (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 11.
CAUTION
Failure to tighten the header as indicated in step 16
may cause the header to leak or become permanently 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
grommet 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. Install the longer syphon loop tube (part number
R0483601) to the pressure switch and locate
the the pressure switch in the front area of the
cabinet.
19. Reconnect the white wire on the pressure switch
(PS) and the white wire on the Fireman's switch
terminal.
20. Reinstall the temperature sensor in the inlet/
outlet header and tighten the nut.
21. Reconnect the black and white wires to the water
pressure switch.
22. 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.
12. Place the inlet/outlet header over the bolts and
gasketed tubes on the left 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. Refer to Figure 9.
NOTE Do not reverse the position of the bypass.
13. Thread on the ten (10) bolts and washers and
hand tighten.
14. Place the return header over the bolts and gasketed 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.
7
3
2
8
6
4
10
1
5
9
Figure 11. Header Bolt Tightening Sequence
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
CAUTION
In order to prevent property damage or injury, be
sure that none of the wires are in contact with a
sharp edge or a hot surface.
ATTENTION
Afi n d'empêcher des dégâts matériels ou des bles-
sures, assurez-vous qu'aucun des fi ls n'est en con-
tact avec un bord tranchant ou une surface chaude.
23. Install the return header side cover plate on the
right side of the unit.
24. Install the I/O header side cover plates, top and
bottom on the left side of the unit.
25. Replace the front panel (door).
Page 19
in which the water fl ow can be shut off between the
heater outlet and the pool/spa.
A pressure relief valve is not supplied with the
Legacy heater. However, it is recommended that a
pressure relief valve be installed and may even be
required by local codes. Be sure to check any applicable installation codes in your area to determine
whether a pressure relief valve is required. See Section
11.2 (Parts List) of this manual for the appropriate kit
part number.
The maximum working pressure of this heater
is 75 psi. Be sure to take into consideration the
maximum allowable pressure of the other components
in the system when selecting a PRV. Any pressure
relief valve installed must comply with provisions of
the standard described in ANSI Z21.22 for the United
States or CSA 4.4 in Canada.
Follow these steps to install a pressure relief valve:
5.5 Connections at Heater
The Legacy heater has a standard two (2) inch
water header and coupling design. With this feature,
only nominal 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.
To connect a section of 2” PVC or CPVC pipe to
the heater, fi rst slip a coupling nut onto the pipe. Then
prepare the end of the pipe with the proper PVC/CPVC
primer and glue. Follow the manufacturer’s instructions provided with the primer and glue for preparation
procedures and curing times. Apply the slip-fi t side of
the coupling to the end of the pipe. Allow the glue to
cure completely. Set the o-ring into the groove on the
face of the coupling. Slide the coupling nut up to the
coupling and tighten it to the threaded connection on
the header (see Figure 12).
5.6 Pressure Relief Valve
A pressure relief valve (PRV) is recommended in
all installations, and is mandatory in any installation
1. To protect the threads while drilling, screw the
brass adapter (included with the Jandy PRV kit)
into the blind threaded hole on the top of the
inlet/outlet header.
2. Using the countersink in the center of the blind
hole as a guide, drill a 1/4 inch hole through the
plastic (see Figure 13).
3. Open the hole by reaming it with a 3/8 inch drill
bit.
4. Open the hole again by reaming it with a 1/2 inch
drill bit.
CAUTION
Initially drilling a 1/2" hole without reaming may
cause the bit to "grab" on the plastic. This may
cause personal injury or damage the plastic header.
ATTENTION
Si vous commencez à percer le trou de ½" sans
alésage préalable, la mèche risque de « mordre »
dans le plastique. Vous risquez de vous blesser ou
d’endommager le tuyau collecteur de plastique.
O-RING
TAILPIECE
Figure 12. Piping to Heater
UNION NUT
PVC OR CPVC PIPE
5. Remove the brass adapter and clean the cuttings
out of the hole.
6. Install the rubber washer at the bottom of the
hole (see Figure 14).
7. Thread the adapter into the hole and tighten so
that it seals against the rubber washer.
8. With a permanent marker, place a mark on the
adapter so that the mark faces the same direction
as the water connections on the header.
9. Remove the adapter from the hole.
Page 20
START WITH A 1/4" BIT
THEN OPEN HOLE WITH
A 3/8" BIT THEN OPEN
HOLE WITH A 1/2" BIT
Figure 13. Drill Hole for Pressure Relief Valve
PRESSURE RELIEF
VALVE HAND
TIGHTEN ONLY
RUBBER WASHER
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
TEMPORARILY INSTALL
BRASS ADAPTER TO
PROTECT PLASTIC
THREADS
BRASS ADAPTER
CAUTION
Do not use any pipe compound or pipe dope on
the threads of the adapter or any part that comes in
contact with the plastic headers. These compounds
may damage the header over a period of time.
ATTENTION
N’utilisez ni pâte à joint ni pâte lubrifi ante sur le
fi letage du raccord intermédiaire ou sur toute pièce
qui entre en contact avec le tuyau collecteur. Ces
produits risquent d’endommager le tuyau après un
certain temps.
CAUTION
In order to prevent property damage, do not overtighten. Overtightening may crack the header.
ATTENTION
Afi n d'empêcher des dégâts matériels, ne serrez
pas trop. Le serrage excessif peut provoquer des
fi ssures dans la tête
DO NOT TIGHTEN WITH A WRENCH.
Overtightening may crack the header. Route the
discharge piping so that discharge from the pipe does
not endanger anyone near the heater. Refer to your
local installation codes for more detailed information.
The valve setting should be at or below the maximum
working pressure of any component in the fi lter
system. The maximum working pressure of the Legacy
heater is 75 psig.
Figure 14. Pressure Relief Valve Installation
10. Coat the threads of the pressure relief valve
(PRV) with an appropriate metal to metal thread
sealant.
11. Install the adapter on the PRV and tighten using
two wrenches. Use the mark made earlier on the
adapter to orient the PRV to the desired direction
in relation to the water connections on the header.
12. Wrap the threads of the adapter with a suitable
tefl on thread tape.
13. Reinstall the adapter, with the PRV, into the
plastic threaded hole and tighten it until the mark
on the adapter is once again facing the same
direction as the water connections on the header.
5.7 Auxiliary Components,
Chlorinators, Ozone Generators,
and Sanitizing Chemicals
The Legacy heater is manufactured with materials that are not compatible with high concentrations of
ozone, chlorine, bromine, or other sanitizing chemicals. Heater damage caused by excessive chemicals
or improper ozonization is not covered by the Zodiac
Pool Systems, 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).
• Wire any electrical chemical feeder so that it
cannot operate unless the fi lter pump is running.
If the feeder has an independent clock control,
synchronize it with the fi lter clock.
• Never deposit chemicals directly in the pool
skimmer.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Section 6. Electrical
Page 21
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 fi ls avant de les débrancher. Des
erreurs de câblage peuvent entraîner un fonctionnement inadéquat et dangereux.
6.1 Main Power
The Legacy heater does not require an external
source of electrical power to operate. The power for
the gas valve and safety circuit are generated by a
thermopile. The thermopile generates a millivolt signal
when heated by the pilot fl ame. Figure 16 shows the
internal electrical wiring diagram and schematic of the
heater.
6.2 Bonding
CAUTION
To prevent premature failure of the appliance resulting from stray voltages and voltage differentials, the
heater must be bonded to other equipment which is
part of the pool plumbing system with a solid copper
wire not smaller in diameter than 8 AWG, 6 AWG in
Canada.
ATTENTION
Pour éviter le bris prématuré de l'appareil dû à
des tensions vagabondes et à des différences
de tension, le chauffe-piscine doit être scellé à
l'équipement faisant partie de la plomberie de la
piscine à l'aide d'un fi l de cuivre massif dont le
diamètre n'est pas inférieur à un calibre 8, et un
calibre 6 pour le Canada.
Zodiac Pool Systems, Inc. requires that the appliance be connected to a "bonding loop" that includes all
electrical equipment in the system and on the equipment pad. Bonding lugs must be connected with a
solid copper wire not smaller than 8 AWG (6 AWG in
Canada). Failure to do so will void warranty.
Additionally, in the United States the National
Electrical Code and in Canada the Canadian Electrical Code, require that all metallic components of
a pool structure, including reinforcing steel, metal
fi ttings and above ground components be bonded
together (forming a “bonding grid”) with a solid
copper conductor not smaller than a 8 AWG (6 AWG
in Canada).
BLACK
Figure 15. Fireman's Switch or Control Connection
BLACK
OR CONTROL
The NEC and the CEC also require that the
equipment and/or appliances associated with the pool
water circulating system, including, but not limited to,
pump motors and heaters be bonded together as part
of the equipotential bonding grid. Zodiac provides a
special labeled bonding lug on the right side of the
heater to accommodate this requirement.
6.3 Auxiliary Time Clock Wiring
If you install a time clock to control the fi lter
pump operation, it is recommended that the time clock
have its own low voltage (Fireman’s) switch to turn
off the heater before turning off the pump. The switch
should shut off the heater about 15 minutes before
the fi lter pump shuts off. This will allow for a more
effi cient operation by removing any residual heat
contained in the heat exchanger back to the pool.
To install a time clock auxiliary switch into the
heater wires (see Figure 15):
1. Remove heater door.
2. Remove the factory installed wire between termi-
nals 1 and 2 on the terminal strip (see Figure 15).
3. Connect the wires from the time clock auxiliary
switch to the two terminals. Use American Wire
Gauge (AWG) No. 14 gauge stranded copper
wire with a temperature rating of 221°F (105°C)
or greater.
The length of the wire between the heater and
the time clock should not exceed 10-15 feet (4.57 m).
The contact points of the time clock switch should be
silver, or a low resistance alloy.
Page 22
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
MILLIVOLT HEATER ELECTRICAL DIAGRAM
Schéma Électrique Du Chauffe-Eau Modèle Millivolt
Connection Diagram
Schéma de montage
BK - Black
W - White
Y - Yellow
R - Red
IF ANY OF THE ORIGINAL
WIRE AS SUPPLIED WITH
THE HEATER MUST BE
REPLACED, APPLIANCE
WIRING MATERIAL RATED
FOR 105°C MUST BE USED.
WHERE MARKED THUS
APPLIANCE WIRING
MATERIAL FOR 200°C MUST
BE USED.
Si l'un quelconque des fils
d'origine fournis avec le
chauffe-eau doit être
remplacé, un fil pour appareils
électriques à tolérance
nominale de 105°C doit être
employé. Si le fil porte le
symbole, le remplacer
uniquement par un fil pour
appareils électriques à
tolérance nominale de 200°C.
BK - Noir
W - Blanc
Y - Jaune
R - Rouge
Y
Y
PP/TH
Y
H/W Gas Valve
Robinet à gaz H/W
Contacteur de
fin de course
max. 130°
BK
de
R
130°
High Limit
Switch
Pressure
Switch
Manostat
W
BK
Temperature Control
Régulateur de température
On
Off
BK
Min
OO
POT
POT
VALV E
(TH)
(PP)
BK
Y
Piezo
Sparker
Étinceleur
piézoélectrique
SEN
+
Max
SEN
TH/PP
Sensor
Capteur
150°
High Limit
Switch
Contacteur de
fin de course
max. 150°
BK
Fireman
Switch
Connection
Montage
contacteur
"pompier"
W
Fusible
W
Link
Élément
fusible
W
Y
W
TH
PP
BK
Y
Générateur
Pilot
Gen
veilleuse
_
Generator
Gén
de veilleuse
On/Off
Switch
Interrupteur
marche/arrêt
PP/TH
W
Fusible
Link
Élément
fusible
Fireman
Switch
Connector
Montage
contacteur
"pompier"
Y
150°
Hi-Limit
Switch
Contacteur
de fin de course
max. 150°
Contacteur
de fin de course
max. 130°
W
130°
Hi-Limit
Switch
Pressure
Switch
Manostat
Figure 16. Legacy Connections/Schematic Wiring Diagram
+
Pilot
é
rateur
Temperature Control
Régulateur de température
TH/PP
BK
CIRCUIT
Sen
Sen
POT POT
Sensor
Capteur
Rotary Dial
Cadron rotatif
Pilot
Veilleuse
Piezo
Sparker
Étinceleur
piézoélectrique
R
Y
TH
BK
PP
Y
Pilotstat
Power
Unit Coil
Bobine de l'unité
d'alimentation de
commande veilleuse
Valve
Operator Coil
Bobine d'opération
du robinet
PP
H0326000B
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 23
Section 7. Operating Instructions
7.1 Normal Operation
The Legacy model LRZ millivolt heaters are
capable of automatic operation based on a call for
heat at a preset temperature. The heater has an internal safety system which allows operation in a variety
of conditions and prevents operation when certain
adverse conditions are encountered.
When the heater's pilot is lit and the pilot
generator is providing a millivolt signal to the safety
circuit, water is fl owing through the heater, and the
temperature of the water entering the heater is below
the temperature control setting, an operating cycle is
initiated by the automatic control. The temperature
control circuit is closed, activating the gas valve and
the gas valve is opened. Gas fl ows through the burners,
is mixed with air in the combustion chamber, and is
ignited by the pilot. Operation will continue until the
temperature of the water entering the heater reaches
the temperature control setting.
If ignition is unsuccessful, or if the fl ame fails
during normal operation, the temperature control
circuit opens and shuts off the gas valve.
7.2 Start-Up
CAUTION
Do not use this heater if any part has been under
water. Immediately call a qualifi ed service techni-
cian to inspect the heater and replace any part of
the control system and any gas control which has
been under water.
ATTENTION
N'utilisez pas cet appareil s'il a été plongé dans
l'eau, même partiellement. Faites inspecter
l'appareil par un technicien qualifi é et remplacez
toute partie du système de contrôle et toute commande qui ont été plongés dans l'eau.
CAUTION
Should overheating occur or the gas supply fail to
shut off, turn off the manual gas control valve to the
heater.
ATTENTION
En cas de surchauffe ou si l'alimentation en gaz ne
s'arrête pas, fermez manuellement le robinet d'arrêt
de l'admission de gaz.
CAUTION
Do not attempt repairs on the gas controls or appliance. Tampering is dangerous and voids all warranties.
ATTENTION
Ne tentez pas d’effectuer des réparations au système de régulation du débit du gaz ou à l’appareil.
Toute modifi cation non autorisée est dangereuse et
entraîne l’annulation de toutes les garanties.
CAUTION
Keep all objects off the top of the heater. Blocking
air fl ow could damage the heater, and may void the
warranty.
ATTENTION
Ne posez aucun objet sur le dessus de l’appareil.
Il pourrait empêcher la circulation de l’air, ce qui
risquerait d’endommager l’appareil et d’annuler la
garantie.
WARNING
Vent pipes, draft hoods, and heater tops get hot!
These surfaces can cause serious burns. Do not
touch these surfaces while the heater is in operation. Adding a vent cap reduces the temperature on
the top.
AVERTISSEMENT
Les tuyaux d’aération et le dessus de l’appareil
deviennent chauds! Ils peuvent causer de graves
brûlures. Ne touchez pas à ces surfaces lorsque
l’appareil est en marche.
WARNING
For your safety, when starting the heater, keep your
head and face well away from the lower fi rebox
opening to prevent any risk of personal injury.
AVERTISSEMENT
Pour votre sécurité personnelle lorsque vous mettez
l’appareil en marche, tenez votre tête et votre visage loin du brûleur pour éviter tout risque de blessure.
Be sure that there is water in the pool and that the
surface level is above the skimmer or other inlet of the
pool’s fi lter system.
Confi rm that pool water is fl owing normally
through the pool system and equipment. With any new
pool or spa installation, operate the fi lter pump with
the heater off long enough to completely clean the
water. This will remove any installation residue from
the water. Clean the fi lter at the end of this operation
before starting the heater. Start the heater in accordance with the Operating Instructions section of this
manual, with particular attention to the lighting and
shutdown instructions and temperature control operation.
Page 24
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
The heater may not start on the fi rst try. Air in
the gas line or other start-up situations may cause it to
cycle.
When raising the temperature of a cold pool,
remove all time clock settings. This lets the fi lter
system and heater operate continuously until the water
reaches the temperature setting on the temperature
control. When that happens, the heater will automatically shut off, but the fi lter pump will keep running.
When the heater starts, immediately feel the
outlet header of the heater to confi rm that there is
adequate water fl ow. The header should not be hot.
Normally, water temperature will rise only a few
degrees as it passes through the heater, and a “hot”
header or pipe indicates low water fl ow.
WARNING
When the heater is fi red for the fi rst time, the com-
bustion chamber refractory binder material is driven
out by the heat of the fl ame. White smoke and/or
sharp odors may be emitted from the vent during
this period. Do not inhale combustion product fumes
at any time, and especially when these fumes are
being emitted. This "burn-in" period will last only a
few minutes.
AVERTISSEMENT
Lorsque l’appareil est mis en marche pour la
première fois, le matériau liant réfractaire de la
chambre de combustion est expulsé par la chaleur
de la fl amme. De la fumée blanche et de fortes
odeurs peuvent se dégager du tuyau d’aération à
ce moment-là. N’inhalez les fumées de combustion
à aucun moment, surtout au moment où elles sont
émises. Cette période de combustion ne durera que
quelques minutes.
7.3 Lighting and Shutdown Procedures
Before starting your heater, be sure that you are
familiar with the setting and operation of the heater
controls. Once the controls are set to your preferences,
follow the instructions outlined on the following page
(Figure 18). Read and follow all safety instructions
fi rst.
A more detailed set of instructions of the operation of the controller follows in the next section.
WARNING
DO NOT attempt repairs on the gas control or
heater. Tampering can cause severe bodily injury or
death and voids all warranties.
AVERTISSEMENT
N’ESSAYEZ PAS de faire vous-même des réparations sur le contrôleur de gaz ou le réchauffeur.
L’altération du produit peut causer des blessures
corporelles graves ou même la mort et annule
toutes les garanties.
WARNING
Do not attempt to operate the heater with the door
off. Doing so may cause severe bodily injury.
AVERTISSEMENT
Ne tentez pas d'opérer l’appareil sans que la porte
soit en place. Vous pourriez être victime de blessures corporelles graves.
7.4 Turning the Heater On/Off and
Setting the Temperature Control
The temperature control (see Figure 17) is
calibrated at the factory and covers a range from
approximately 70°F to 104°F (21°C to 40°C). Use an
accurate pool thermometer to determine the best water
temperature for your uses.
The Legacy temperature control panel has a
rocker switch to turn the heater on and off. It also has
a rotary dial to set the desired thermostat setting (see
Figure 17).
Once the heater has been lit by following the
safety and lighting procedures in Section 7.3, set the
toggle switch on the control panel to "ON" to start the
heater operation. If the heater senses that the pump
is on and the thermostat setting is higher than the
temperature of the pool/spa water, the pilot will ignite
the main burners.
NOTE: If your heater is confi gured to operate on LP
gas and the LP tank runs out of fuel, turn off
gas at the heater. After the tank is refi lled, the
heater must be relit following the instructions
found on the inside of the heater. A copy of
these instructions appears on the following
page.
H0286600
Figure 17. Temperature Control
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 25
FOR YOUR SAFETY READ
BEFORE OPERATING
WARNING: If you do not follow these instructions
exactly, a fi re or explosion may result, causing prop-
erty damage, personal injury or loss of life.
LIGHTING INSTRUCTIONS INSTRUCTION D’ALLUMAGE
INSTRUCTIONS TO LIGHT HEATER
1. Position ON/OFF switch to “OFF”.
2. Turn gas control knob clockwise until it stops at
“OFF” position.
3. Wait fi ve (5) minutes before lighting pilot.
4. Turn knob on gas valve counterclockwise to
“PILOT” then push control knob all the way and hold
down. Push the button of the sparker, repeating until
confi rming that pilot lights, by observing refl ection on
burner tray mirror. Continue to hold the control knob
in for about one (1) minute after the pilot is lit. If it goes
out, repeat steps 3 and 4.
5. Turn gas control knob counterclockwise to “ON”.
6. After replacing door, set thermostat to desired setting
and turn appliance ON/OFF switch to “ON”. Valve has
built-in delay before coming on.
RELIGHTING
If pilot goes out, repeat steps 1 through 6.
TO SHUT OFF HEATER
To shut off main burners turn gas control knob
clockwise until it stops at “PILOT”. For
complete shut-off press down slightly on knob while
turning clockwise to “OFF”. Do not force.
Position ON/OFF switch to “OFF”.
PILOT
BURNER
TO VA LVE
PRÉCAUTIONS À LIRE
AVANT D’UTILISER
AVERTISSEMENT : Si vous ne suivez pas ces instructions à la lettre, il y a risque d’incendie ou d’explosion,
pouvant entraîner des dégâts matériels et des blessures
graves voire mortelles.
INSTRUCTION D’ALLUMAGE DU CHAUFFE-PISCINE
1. Placer l’interrupteur général de l’appareil à la position
“OFF”.
2. Faire tourner le bouton du robinet à gaz vers la droite
jusqu’à ce qu’il s’arrête à la position “OFF”.
3. Attendre cinq (5) minutes avant d’allumer la veilleuse.
4. Faire tourner le bouton du robinet à gaz vers la gauche
jusqu’à la position “PILOT” puis enfoncer le bouton
complètement à fond et le maintenir dans cette position.
Faire tourner le bouton de la génératrice d’étincelles de
facon répétée jusqu’à confi rmer que la veilleuse s’est
allumée en observant sa réfl exion sur la cuvette du bec de
gaz. Continuer à maintenir le bouton en position enfoncée
pendant environ une (1) minute après l’allumage de la
veilleuse. Si elle s’éteint, répeter les étapes 3 et 4.
5. Faire tourner le bouton du robinet à gaz vers la gauche
jusqu’à la position “ON”.
6. Après avoir remis en place le panneau d’accès, régler le
thermostat sur la valeur voulue, et mettre l’interrupteur
général de l’ appareil sur la position “ON”. Le robinet à
gaz incorpore un retardement d’allumage.
RÉALLUMAGE
Si la veilleuse s’éteint, répéter les étapes 1 à 6.
POUR ARRETER LE CHAUFFE-PISCINE
Pour éteindre les brûleurs principaux, faire tourner le
bouton du robinet à gaz vers la droite jusqu’à
ce qu’il s’arrête à la position “PILOT” . Pour arrêter
complètement l’appareil, enfoncer le bouton et continuer
à le faire tourner vers la droite jusqu’à la position
“OFF”. Ne pas forcer. Mettre l’interrupteur général sur la
position “OFF”.
IMPORTANT INFORMATION
1. CAUTION: Do not store pool chemicals or fl ammable
materials near this appliance.
2. PH LEVEL: Pool Water must be maintained between 7.4
and 7.6 when operating unit (See section entitled "Water
Chemistry" in operating manual).
3. BACKWASHING: Turn heater off 20 minutes before
backwashing or shutting down fi lter to prevent damage
to unit.
4. WINTERIZE: All gas to unit must be shut off and all water
drained from unit to protect it from freezing damage.
NOTE: THIS DOOR MUST BE FITTED TO UNIT DURING
NORMAL OPERATIONS.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS
OR ANY OTHER APPLIANCE.
NOTE: SOME EXPOSED PARTS OF THIS HEATER MAY BE
HOT WHEN OPERATING.
Figure 18. Legacy Lighting and Shutdown Procedures
RENSEIGNEMENTS IMPORTANTS
1. AVERTISSEMENT: Ne pas ranger de produits chimiques ni
de matériaux infl ammables près de cet appareil.
2. NIVEAU DE pH de l’eau de la piscine doit rester entre 7.4 et
7.6 pendant le fonctionnement de l’appareil. (Voir la section
autorisé "la Chimie d'Eau" du manuel d’utilisation.)
3. RETRE-RINCAGE: Arrêter le chaffe-eau 20 minutes
avant le rétro-rincage ou l’ arrêt du fi ltre pour éviter
d’endommager l’appareil.
4. PREPARATION POUR L’HIVER: Couper l’alimentation en
gaz de l’appareil pour le protéger du gel.
REMARQUE: CETTE PORTE DOIT ÊTRE BIEN AJUSTÉE SUR
L’APPAREIL PENDANT SON FONCTIONNEMENT NORMAL.
AVERTISSEMENT DE SÉCURITÉ
NE PAS ENTREPOSER NI UTILISER DE L’ESSENSE OU
TOUTE AUTRE VAPEUR ET LIQUIDE INFLAMMABLES
AUX ALENTOURS DE CET APPAREIL OU DE TOUT AUTRE
APPAREIL.
REMARQUE: PENDANT LE FONCTIONNEMENT, CERTAINES
PIÈCES EXPOSÉES DE CE CHAUFFE-PISCINE PEUVENT
DEVENIR TRÈS CHAUDES.
H0325000-
Page 26
In order to prevent property damage, the heater is
designed to run only when the fi lter pump is run-
ning. If the heater does not immediately turn off
when the pump turns off, turn the heater off at the
control panel. The heater's pressure switch may
need adjusting (see Section 7.5)
Pour éviter les dommages à la propriété, le réchauffeur est conçu pour fonctionner seulement lorsque
la pompe à fi ltration est en marche. Si le réchauf-
feur ne s'éteint pas immédiatement lorsque vous
arrêtez la pompe, éteignez le réchauffeur sur le
panneau de commandes. Le commutateur de pression du réchauffeur devra peut-être être ajusté (voir
la Section 7.5).
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
CAUTION
ATTENTION
SLOWLY TURN ADJUSTMENT
SPROCKET CLOCKWISE
UNTIL HEATER GOES OFF.
Figure 19. Pressure Switch Adjustment
Once the pool/spa water temperature reaches the
thermostat setting, the heater will automatically stop
fi ring. As the pool/spa water temperature falls below
the thermostat setting the heater will once again start
the heating cycle.
Rotate the thermostat dial clockwise to increase
the temperature setting and counterclockwise to
decrease the setting. It may take several attempts to
set the thermostat dial to the desired temperature. Be
sure to use an accurate thermometer to measure water
temperature. Once the desired temperature setting is
found, loosen the screw on the Temp-Lok ring and
rotate the ring until the stop rests against the knob.
Tighten the screw to hold the knob in position. This
will prevent accidental moving of the dial and possible
overheating of the water.
IMPORTANT: The temperature controls cannot
be calibrated in the fi eld. If the control is faulty,
shut down the heater by following the procedures in
Section 7.3 and have a qualifi ed service technician
replace the control. DO NOT use the thermostat switch
to completely shut down the heater.
7.5 Adjusting the Water Pressure
Switch
CAUTION
The water pressure switch should be adjusted to
turn the heater off when the pump is off. Setting the
switch to close at too low of a fl ow can damage the
appliance. Adjust the switch to turn the heater off,
not on.
ATTENTION
Le manocontact de pression d’eau doit être réglé
de façon à ce que l’appareil cesse de fonctionner
si la pompe s’arrête. Si le manocontact est réglé
pour se fermer lorsque le débit d’eau est trop faible,
l’appareil risque de s’endommager. Réglez le manocontact pour qu’il arrête l’appareil, et non pour qu’il
le mette en marche.
The pressure switch is preset at the factory for
activation at 2 psi (14 kPa). Do not adjust the pressure
switch if the heater is installed more than 15 feet (4.57
m) below the pool surface. Consult your local Jandy
representative for recommendations.
On some installations, the piping from the heater
to the pool is very short. The back pressure could be
too low to trigger the pressure switch. If this happens,
it may be necessary to install a directional fi tting or
elbows where the return line enters the pool. This will
increase back pressure enough for the heater to operate
properly.
Make sure the pool fi lter is clean before making
any pressure switch adjustment. A dirty fi lter will
restrict the water fl ow and the pressure switch cannot
be adjusted properly.
To adjust the pressure switch, proceed as follows
(see Figure 19).
1. Turn the heater control to OFF. See Figure 17.
2. Remove the side panel above the front header to
access the water pressure switch.
3. Start the fi lter pump and confi rm by means of a
voltmeter that the pressure switch closes (if the
switch fails to close, replace it with a switch that
has a lower minimum setting).
4. Turn the heater ON. Set the temperature control
to the max position. Heater should start.
5. With your fi ngers, turn the adjustment sprocket
very slowly clockwise until the heater goes off.
6. Slowly turn the pressure switch adjustment
sprocket counterclockwise one-quarter turn. The
heater should come back on.
7. Check the adjustment by turning the fi lter pump
OFF. The burners should shut off immediately.
If they do not, restart the fi lter pump and repeat
Steps 6 and 7. Check the adjustment again.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 27
8. Return the pool temperature control to the
desired temperature.
It may be necessary to repeat these steps to get
a proper setting. The switch must be set so that the
heater will not fi re unless the pump is running. If a
proper setting cannot be reached, contact the factory
service department.
7.6 Temperature Rise
NOTE A temperature rise measurement kit is needed
to perform this test, order part number
R0336000.
The Legacy pool and spa heaters have an inter-
nal bypass which accommodates a wide range of
water fl ow. The bypass is easily adjustable to change
the temperature rise for optimum performance and
length of heater life. The bypass assures constant heat
exchanger fl ow even though fl ow through the fi lter
system will vary depending on how dirty the fi lter is.
For most installations, an external bypass valve
is not needed in the heater water piping. This is due to
the large size of the heater's internal bypass valve. If
the pump fl ow rate is known to exceed 125 gpm (7.9
l/s), an external bypass may be needed to assure proper
heater operation.
Water fl ow should be confi rmed upon start-up of
the heater and in most servicing situations. If the fl ow
is not normal, corrections must be made to the pool
system. Flow is evaluated by determining the water
temperature rise through the heat exchanger.
Before checking the temperature rise, make sure
that the pool fi lter is clean and that gas supply and
manifold pressures are correct. If necessary, clean
all components of the fi lter system. Temperature rise
BYPASS
ADJUSTMENT
SCREW
is measured in the return header of the Legacy. To
measure the temperature rise, turn off the fi lter pump
and remove the plastic plug protruding through the
cabinet on the return header side of the heater. See
Figure 20. With the plug removed, install the special
thread adapter and Pete’s Plug
®
fi tting and insert a
pocket thermometer. A temperature rise measurement
kit is available through your Jandy distributor. See
Section 11 of this manual for the correct kit number.
The internal bypass can be adjusted by means of
a screw on the right-hand side of the header. To adjust
the temperature rise to within the ranges specifi ed in
Table 6, proceed as follows:
1. If the piping system has an external bypass valve,
close it.
2. Turn the heater control panel to OFF.
3. Start the fi lter pump.
4. After three minutes, note and record the
thermometer reading. This is the pool water
temperature.
5. Start the heater by turning the controller to ON.
Allow the heater to operate for fi ve minutes
or more. Note and record the thermometer
reading. Subtract pool water temperature from
this reading. This difference is the temperature
rise. Refer to Table 6. If your measured tempera-
ture rise is within the range designated for your
heater, skip steps 6 through 8.
6. Locate the bypass adjustment screw on the right-
hand side of the header (see Figure 20). Loosen
the nut so that the screw can be adjusted. A slight
water leak past the nut may be expected. Turn the
screw counterclockwise to decrease the tempera-
ture rise, and clockwise to increase the tempera-
ture rise as needed to achieve the ranges in Table
6. After the adjustment, tighten the nut so that no
leaks occur.
THERMOMETER WITH
PETE'S PLUG
Figure 20. Temperature Rise Measurement
7. If the temperature rise is too low and cannot be
raised by means of the adjustment screw, the fl ow
is in excess of 125 GPM (7.9 lps). An external
bypass will need to be installed, or if one already
exists, open the external bypass valve gradu-
ally until the temperature range in Table 6 is
achieved.
8. If it was necessary to adjust the external bypass
as outlined in step 7, scribe a line on the bypass
shaft and case to mark the correct adjustment
position. Wire or remove the valve handle to
prevent tampering.
Page 28
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Table 6. Water Temperature Rise and Flow Rates
(Measured at Return Header)
Model Minimum
Temp Rise,
°F (°C)
125 3 (2) 7 (4) 30 (1.9)
175 5 (3) 10 (6) 30 (1.9)
250 7 (4) 15 (8) 30 (1.9)
325 9 (5) 17 (9) 30 (1.9)
400 11 (6) 20 (11) 30 (1.9)
Maximum
Temp Rise,
°F (°C)
Minimum
System Flow
GPM (lps)
In a system without external bypass, it may be
necessary to make changes. If temperature rise is too
low, a manual bypass must be installed. If temperature rise is too high, there is inadequate fl ow, possibly
requiring a change to the piping system or a larger
pump. Before proceeding with either remedy, verify
proper heater operation. Low gas input results in low
temperature rise and vice-versa. A problem with the
heater internal bypass assembly also affects measured
temperature rise.
Section 8. Maintenance
Table 7. Optimal Water Chemistry Ranges*
Test Recommended Level
Free Chlorine 1.0 to 3.0 ppm
Bromine 2.0 to 4.0 ppm
pH 7.2 to 7.8 (ideal range of 7.4 to 7.6)
Total Alkalinity (TA) 80 to 120 ppm
Calcium Hardness (CH) 175 to 400 ppm
Cyanuric Acid 50 to 75 ppm
Total Dissolved Solids
(TDS)
Copper 0 ppm
* Concentration levels taken from "Basic Pool and Spa
Technology" published by APSP (Association of Pool and Spa
Professionals).
1000 to 2000 ppm (Excluding dissolved NaCl from a Salt Chlorine
Generator)
8.2 Seasonal Care
CAUTION
Do not operate this heater outdoors at temperatures
below 20 degrees Fahrenheit (°F) (-7 degrees
Celsius [°C]).
8.1 Water Chemistry
The mineral content of swimming pool water
increases daily due to natural evaporation and the
addition of sanitizing chemicals. If the mineral concentration in the pool gets too high, the excess minerals will deposit on the walls of the pool, in the fi lter
system, and in the heater tubes.
The proper chemical balance in spa water is
more critical than in a swimming pool heater operation. Due to the spa's size, high water temperature and
heavy usage, chemical values in a spa can vary greatly.
This chemical imbalance can result in unsanitary water
conditions, and affect the life of the heater.
Proper chemical balances are necessary for
sanitary bathing conditions as well as ensuring your
heater's long life. Kits are available from your local
pool supply dealer for making the various tests for
mineral content. One of these kits will detect copper in
the system. This is usually a warning that corrosion is
taking place, possibly due to a low pH value combined
with other chemistry problems. The condition can
be corrected by changing the spa water and closely
monitoring the pH factor and chemical properties of
the water. Be sure to keep your chemical levels within
the values indicated in Table 7. Zodiac Pool Systems,
Inc. does not warrant heat exchangers damaged by
corrosive chemical levels or excess dissolved solids
in pool or spa water.
For spas, it is also necessary to perform water
changes in addition to chemical treatment. It is recommended to change the spa water every 60 days for light
usage and every 30 days if usage is heavy.
ATTENTION
Ne faites pas fonctionner cet appareil à l’extérieur à
des températures inférieures à 20 degrés Fahrenheit (oF) (-7 degrés Celsius [oC]).
8.2.1 Spring and Fall Operation
During periods when the pool is only going to be
used occasionally, turn the temperature control down
to the MIN setting. This prevents the pool water from
becoming chilled, and minimizes the time required to
raise the pool water back up to the desired temperature.
In areas subject to only short freeze periods, turn
off the heater and run the pump continuously for the
length of the freeze period.
If the heater is not going to be used for a long
period of time, shut it down completely. Follow the
instructions found on the inside of the heater, or page
25 of this manual.
8.2.2 Winterizing
In areas where freezing temperatures occur in
winter, and the pool or spa will not be used, have your
service technician perform the following steps:
1. Turn off the main gas supply valve to the heater,
outside the heater jacket.
2. Remove heater door.
3. Shut down the heater following the shutdown
instructions found on the inside of the heater or
on page 25 of this manual.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
O-RING
DRAIN PLUG
Figure 21. Draining the Heater
PRESSURE
SWITCH
DISCONNECT HERE
(WINTERIZING
Figure 22. Pressure Switch Copper Tubing
COPPER
TUBING
Page 29
5. Turn on the heater following the lighting instructions found on the inside of the heater, or page 25
of this manual.
8.3 Inspection and Service
The Legacy heater is designed and constructed
to provide long performance life when installed and
operated properly under normal conditions. Periodic
inspections, especially at spring start-up, are important to keep your heater running safely and effi ciently
through the years. Improper maintenance can result in
conditions where nausea or asphyxiation from carbon
monoxide or fl ue gases could cause severe injury,
property damage or death.
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.
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.
4. Remove the drain plug from the inlet/outlet
header, and completely drain the heater before
the fi rst frost. See Figure 21.
5. After all water has drained from the heater, check
for mineral buildup in the openings.
6. Use compressed air to blow out any standing
water remaining in the heat exchanger.
7. Inspect the gaskets on the drain plugs and
reinstall the plugs, but do not tighten.
8. Disconnect the pressure switch from the copper
tubing. See Figure 22.
8.2.3 Spring Start-up
To restart the heater in the spring, have a profes-
sional service technician reassemble the heater as
follows:
1. Attach the copper tubing to the pressure switch
(see Figure 22).
2. Tighten the drain plugs.
8.3.1 Owner Inspection
Zodiac Pool Systems, Inc. recommends that you
inspect the heater on a continual basis and especially
after abnormal weather conditions. The following
basic guidelines are suggested for your inspection:
1. Keep the top and surrounding area of the heater
clear of all debris.
2. Keep the area around and beneath the heater
clean and free of all combustible materials such
as paper, leaves, etc.
CAUTION
Do not store or use gasoline or other fl ammable
vapors, liquids or chemicals in the vicinity of this or
any other appliance.
ATTENTION
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. Turn on the fi lter pump and circulate water
through the heater for 5 minutes. Check for leaks
while circulating.
4. Turn on the main gas supply valve to the heater,
outside the heater jacket.
Page 30
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
WARNING
Do not use this heater if any part has been under
water. Immediately call a qualifi ed service techni-
cian to inspect the heater and replace any part of
the control system and any gas control which has
been under water.
AVERTISSEMENT
N'utilisez pas cet appareil s'il a été plongé dans
l'eau, même partiellement. Faites inspecter
l'appareil par un technicien qualifi é et remplacez
toute partie du système de contrôle et toute commande qui ont été plongés dans l'eau.
3. If the heater is equipped with a pressure relief
valve, check for corrosion in and around the
valve. Twice a year, with the fi lter pump on, lift
the release lever on the top of the valve to make
sure that water runs freely through it. If corrosion
is found, replace the pressure relief valve. When
replacing the valve, be sure that the pump is off.
Install the valve so that the discharge is directed
away from any area that may be damaged by
water.
4. Be sure all combustion air and ventilation
openings are not blocked. Check for spider webs
and other debris inside the heater, in the vents on
all sides of the heater jacket and in the exhaust
outlet– especially after a long period of nonuse.
8.3.2 Professional Inspection
Inspections performed at least once a year by
a qualifi ed technician are required to maintain your
heater's safe and effi cient operation. The following
basic safety checks must be performed.
held beneath the burners. The fl ame should be
a. Blue in color.
b. 1 to 4 inches (25mm to 102mm) above
burner surface (see Figure 23).
7. Inspect the gas and electronic controls, including
the following:
a. High temperature limit switch
b. Water pressure switch
c. Automatic gas valve
d. Fusible Link
e. Temperature control
8. Perform a temperature rise test in accordance
with Section 7.6.
9. If the heater is equipped with a pressure relief
valve, check for corrosion in and around the
valve. With the fi lter pump on, lift the release
lever on the top of the valve to make sure that
water runs freely through it. If corrosion is found,
replace the pressure relief valve. When replacing
the valve, be sure that the pump is off. Install the
valve so that the discharge is directed away from
any area that may be damaged by water.
10. Inspect the external surfaces of the heat exchang-
er tubes for black carbon soot buildup by placing
a mirror between and under the burners when the
heater is fi ring. Remove any soot that has collect-
ed on the tubes, and correct the cause.
NOTE After installation and fi rst start-up, check the
heat exchanger for black carbon soot buildup
after the following periods of operation: 24
hours, 7 days, 30 days, 90 days, and once
every 6 months thereafter.
1. Inspect the venting system for blockage, leakage,
and corrosion.
2. Inspect burners and verify that they are clean.
Clean with a wire brush if necessary to remove
debris.
3. Check for spider webs and other debris in the
pilot and main burner orifi ces - especially at
spring start-up.
4. Check for loose or broken wires and terminal
connections.
5. Make sure that the pressure switch operates
properly by shutting the fi lter pump off and on
a few times. The burner should go off immediately after the pump stops. An ignition sequence
should start shortly after the pump is turned back
on.
6. Make a visual check of the main burner fl ame.
The fl ame can be seen in a mirror arrangement
Figure 23. Main Burner Flame
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
11. Conduct a normal operating cycle and observe
that the sequence proceeds as intended.
CAUTION
For your safety, when starting the heater, keep your
head and face away from the burner area opening
to prevent any risk of personal injury.
ATTENTION
Pour votre sécurité personnelle, lorsque vous
mettez l’appareil en marche, tenez votre tête et
votre visage loin du brûleur pour éviter tout risque
de blessure.
NOTE Keep this manual in a safe place for future
reference by you and your professional
technician when inspecting and servicing the
heater.
Section 9. Troubleshooting
Page 31
9.1 General Heater Troubleshooting
Table 8 lists some of the more common
problems, causes and solutions encountered when
running the heater. Most problems occur when the
heater is being started for the fi rst time after instal-
lation or at spring start-up. Careful installation and
maintenance will help ensure years of trouble free use
from your Legacy heater.
Page 32
#
Symptom Cause Remedy
1. Pump not operating
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Table 8. Legacy Troubleshooting Guide
A. No power
B. Pump defective
C. Incorrectly wired
A. Check circuit breakers and power source.
B. Replace.
C. Recheck wiring.
2. Pilot outage A. Inlet gas pressure too low
B. Inlet gas pressure too high causing
an unstable blowing pilot
C. Weak or defective thermocouple
D. Damaged pilot or thermocouple
E. Dirty pilot
F. Plugged or undersized pilot orifi ce
3. Flame roll-out at
start-up
4. Spillage at draft
hood
5. Lazy fl ame with
yellow tip
6. Not enough heat A. Inadequate gas supply
7. Heater pounding
or knocking
8. Heater condensing
9. Pressure relief
valve opens
10. Pilot is lit but main
burners will not
come on
11. Heater short
cycles
A. Blocked fl ue
B. Pilot out of position (delayed ignition)
C. Blocked heat exchanger
D. Refractory tile out of place
E. Altered vent cap
F. Low gas pressure
A. Cold chimney
B. Vent pipe pitches down to chimney
C. Blocked chimney
D. Altered draft hood
E. Prefabricated chimney with incorrect cap
A. Low primary air / low gas pressure A. Correct manifold pressure according to rating plate.
B. Low manifold gas pressure
C. Heater size inadequate
D. Low temperature rise
A. Inadequate water fl ow through heater A. Check temperature rise between inlet and outlet heater
A. Low water temperature A. Flue product moisture will condense at the start-up until the
A. Restriction in water fl ow system at or
downstream of heater
A. Gas valve not at “on” position
B. Hi-limit switches failed
C. Pressure switch failed or out of
adjustment
D. Fusible link failed
E. Gas valve failed
F. Broken wire in thermostat circuit or
defective thermostat
G. Heater wired incorrectly
A. Low water fl ow through heater
B. Failing hi-limit switch
A. Consult gas utility company. Inlet gas pressure to
heater should be 5.5" to 10.0" water column on natural
gas. 10.0" to 14.0" on propane gas.
B. Pressure should be regulated within limits shown above.
C. Replace thermocouple.
D. Replace.
E. Blow dust or lint out of pilot.
F. Clean or replace pilot orifi ce.
A. Remove blockage.
B. Correct pilot position.
C. Clean and correct as necessary.
D. Clean and correct tile as necessary.
E. Install factory provide vent cap.
F. Check and correct gas pressure.
A. Allow heater to operate fi ve (5) minutes to create draft action.
B. Reinstall vent pipe to pitch up from the heater to chimney.
C. Remove blockage.
D. Install factory-provided draft hood.
E. Install U.L. listed vent cap.
Correct orifi ce size if necessary (see parts list). Clean
burner ports if dirty.
A. Gas meter too small. Gas line from meter to heater too small.
B. Gas pressure on heater manifold, should be adjusted
to 4.0" W.C. (natural gas), 9.0" W.C. (propane gas).
C. Replace with heater of higher input.
D. Check and correct water fl ow.
piping. See section 7.6 for recommended range of
temperature rise. If temperature rise is above the maximum
recommended, check for closed valve in system.
heater water temperature reaches the normal operating
conditions.
A. Check for proper operation of all valves, bypass valve and
any equipment between pool and heater outlet.
A. Turn knob to “on” position.
B. Investigate reason for overheating and replace hi-limit switch
as necessary.
C. Adjust pressure switch (see Section 7.5) or replace as
necessary.
D. Investigate reason for fl ame rollout and replace fusible link as
necessary.
E. Check and replace gas valve as necessary.
F. Check continuity through thermostat circuit with wires
disconnected.
G. Check heater wiring against wiring diagram in Section 6,
correct as necessary.
A. Increase size of pump or increase piping size.
B. Check hi-limit switches and replace as necessary.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 33
Section 10. Professional
Maintenance and Service
WARNING
SERVICING SAFETY
Some of the servicing procedures for the Legacy
heater are hazardous because they involve fuel
gas, electricity, moving parts and procedures which
require testing or temporary bypass of safety controls. For this reason, the heater must be serviced
only by a qualifi ed professional service technician.
IMPROPER SERVICE HAZARD
The Legacy heater incorporates unique design
features. Incorrect service of this heater can result
in personal injury or damage to property. To avoid
such hazards, the heater must be serviced only by
a qualifi ed professional service technician.
AVERTISSEMENT
PRÉCAUTIONS LORS DES RÉPARATIONS ET
DE L’ENTRETIEN
Certaines procédures d’entretien et de réparation
des appareils de chauffage à faibles émissions
Legacy et Legacy présentent des dangers, car
elles mettent en jeu des gaz combustibles, des
composants électriques, des pièces mobiles et des
procédures qui nécessitent des mises à l’essai ou la
dérivation temporaire des commandes de sécurité.
Pour cette raison, l’appareil de chauffage doit être
entretenu et réparé uniquement par un technicien
professionnel qualifi é.
DANGERS D’UN ENTRETIEN INADÉQUAT
Les appareils de chauffage à faibles émissions
comportent des caractéristiques techniques
uniques. Une réparation ou un entretien inadéquat peut entraîner des blessures corporelles ou
des dommages à la propriété. Pour cette raison,
l’appareil de chauffage doit être entretenu et réparé
uniquement par un technicien professionnel qualifi é.
properly adjusted. Also be sure that there is no blockage of the vent or louvers which supply combustion air
to the burners.
10.2 Natural-Draft Combustion System
The Legacy model LRZ millivolt pool heater
has an atmospheric combustion system. This system is
illustrated in Figure 24.
As the heated exhaust gases rise out of the
combustion chamber, fl ow is created through the
system and fresh combustion air is drawn into the
heater through the louvers cut into the front and sides
of the heater. Gas is forced through an orifi ce into
the open end of a burner. When the gas fl ows into the
burner, a “negative” pressure is created at the opening
of the burner. This negative pressure pulls air into the
burner with the gas and mixes the two together. As
the gas/air mixture fl ows through the burner ports it
is ignited in the combustion chamber. Hot combustion products then rise through a highly effi cient heat
exchanger. Combustion products then enter a fl ue
collector and are directed to the outdoors through the
grate top of the heater or a vent pipe and cap.
10.3 Heater Components and Their
Operation
1. Gas Valve / Regulator - The gas valve controls
gas fl ow into the manifold. It provides fl ow only
when the temperature controls require heat and
only if all safety controls enable operation. It is
also a positive pressure regulator. It regulates
the gas pressure in the manifold to specifi cations
addressed earlier in this manual. This is neces-
sary for proper operation of the burner system.
EXHAUST
VENT TOP
FLUE COLLECTOR
10.1 General Information
A qualifi ed professional technician must service
the Legacy model LRZ millivolt pool heater using
Zodiac Pool Systems, Inc. service procedures. Before
calling for service, however, the owner should check
for obvious problems. The other components in the
pool system, including pump, fi lters and strainers,
water valves, gas supply and time clocks have an
effect on heater operation.
Confi rm that the Legacy heater control switch is
set to 'ON' and that the temperature control knob is set
high enough to make the heater operate. Make sure the
pump is operating, that the fi lter and strainers are not
clogged, that there are no mis-positioned water valves,
that the gas is not shut off and that time clocks are
HEAT EXCHANGER
AIR FLOW
Figure 24. Atmospheric Combustion System
COMBUSTION CHAMBER
BURNER
BURNER TRAY SHELF
Page 34
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
2. Temperature Control - The Jandy Legacy
controller is an electronic control which senses
water temperature by means of a thermistor and
controls heater operation to bring the water to the
desired temperature. The desired temperature is
set by rotating a knob on the face of the control
panel. To achieve accurate water temperatures,
the pool/spa water must be monitored with an
accurate pool thermometer.
3. Pilot/Pilot Ignition - The Legacy heater relies
on a standing pilot to ignite the burners when the
temperature control calls for heat. When lit the
pilot receives a constant fl ow of gas from the gas
valve. If the pilot extinguishes, the gas valve is
automatically signalled to stop the fl ow of gas to
the pilot and the burners to prevent a gas build
up in the heater. Igniting the pilot is achieved by
means of a piezo spark igniter mounted on the
inner front panel of the controls compartment of
the heater.
4. Pilot Generator (Thermopile) - The pilot generator is a device, that when heated by the fl ame
of the pilot, generates a small electrical voltage
of approximately 750 millivolts. The voltage
is placed across the temperature controller and
safety circuit of the heater. If this current is
broken at any time, the gas valve is immediately
shut off and the heater stops fi ring. This voltage
is also used to activate the gas valve's pilot coil
which allows gas to fl ow to the pilot after the gas
valve knob is released.
5. Limit Switches - Two limit switches prevent
excessive water temperature - one within the heat
exchanger and one for water leaving the heater.
If either senses excessive temperature, burner
operation is interrupted.
6. Water Pressure Switch - This control senses
whether or not water is available to the heater
by measuring back pressure inside of the heat
exchanger. If the pool water pump fails or the
water fi lter is blocked, the pressure switch
prevents operation of the burner.
7. Fusible Link - This is a single-use switch which
detects abnormal temperature in the component
vestibule. It is a fusible link which is held to
the inner panel just above the burner tray by a
sheet metal bracket. Excessive temperature in
the component compartment, possibly due to a
blocked fl ue or fl ame roll-out, will cause the link
to fail. This opens the safety circuit which shuts
off the gas valve and shuts the heater down.
10.4 Electrical Troubleshooting
This section describes procedures for checking the pilot generator and control components of the
heater one at a time and in the order they appear in the
control circuit.
NOTE Pump must be running during the
troubleshooting procedure.
These procedures require a voltmeter with a
minimum 0-1000 mVDC range. Figure 25 shows the
pilot generator and control circuits, and where to take
measurements. Location numbers and letters in circles
have been added, and will be referenced in the following sections.
As stated at the beginning of this manual, some
of these procedures are hazardous. Only a qualifi ed
service technician should service the heater.
During the trouble shooting procedure, the fi lter
pump must be on, the pilot on the heater must be lit,
the ON/OFF switch on the heater must be in the ON
position and the control knob must be turned to the
maximum setting so that there is a call for heat. We
recommend turning the gas valve control knob to the
"PILOT" position to prevent the main burners from
fi ring throughout the procedure. Before starting the
procedure, be sure that the pilot has been lit for at least
2 minutes and that the pilot generator (thermopile) is
positioned correctly within the fl ame of the pilot.
The pilot generator also operates the pilot coil of
the gas valve, allowing gas to fl ow to the pilot when
the gas valve knob is released from the pilot lighting position (see Section 7.3 "Lighting and Shutdown
Procedures"). If the pilot will not stay lit when the gas
valve knob is released, check the pilot generator output
as described in Section 10.4.2 and replace if necessary.
If the pilot generator output is suffi cient, then check
the gas valve as outlined in Section 10.4.1.
10.4.1 Gas Valve
The gas valve consists of two (2) separate
internal operating valves. The main valve supplies
gas to the main burners for heater operation. The pilot
valve supplies gas to the pilot when the pilot generator
activates the pilot coil.
If the pilot will not stay lit after following the
lighting instructions in Section 7.3, check for the
following:
• Pilot generator output
• Correct type of gas supplied
• Correct gas supply pressure
• Air in the gas line
• Pilot coil wire connections clean and tight
If the pilot will not stay lit after checking the
items listed above, the pilot coil may be causing the
fault. Replace the gas valve.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
BK - Black, Noir
W - White, Blanc
Y - Yellow, Jaune
R - Red, Rouge
150° 130°
150° 130°
9
7
8
10
6
5
14
13
18
Page 35
19
21
20
2
4
3
17
1
11
12
16
15
Figure 25. Test Point Identifi cation Diagram
Page 36
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
If the main burners will not light after following the lighting instructions in Section 7.3, check the
voltage reading between the PP terminal on the gas
valve (test point 1) and the TH terminal on the gas
valve (test point 17). If the meter shows less than
220mVDC then there is a problem with the pilot
generator, the sensors in the safety loop or the control
panel. Follow the trouble shooting procedure as
outlined in sections 10.4.2 through 10.4.7.
If the meter shows more than 220mVDC at test
point 17, then check for the following:
• Correct type of gas supplied
• Correct gas supply pressure
• Correct gas manifold pressure
• Correct orifi ce size
• Air in the gas line
If the main burners will not stay lit after checking
the items listed above, the gas valve may be causing
the fault. Replace the gas valve.
10.4.2 Pilot Generator
The pilot generator generates a 700-750mVDC
signal when heated by the pilot fl ame. When the pilot
generator is connected to the heater's control components, there will be some voltage drop in the circuit so
that the measured voltage will be less than 750mVDC.
But the measured voltage should never be below
500mVDC when the ON/OFF switch is in the "OFF"
position or 220mVDC when the ON/OFF switch is in
the "ON" position.
With the pilot generator connected to the gas
valve and the ON/OFF switch in the OFF position,
place the red lead of the voltmeter on the PP terminal
(test point 1) of the gas valve. Place the black lead
of the meter on the PP/TH terminal (test point 2) of
the gas valve. The meter should show a minimum of
500mVDC. If the meter show less than 500mV, check
for partial shorts, loose or corroded connections or
partially broken wires between the pilot generator and
the gas valve.
If the wires and connections are sound, check the
pilot generator output. You will need alligator clips
to do this. Disconnect the pilot generator from the
gas valve. The pilot will go out. Light the pilot while
pressing down on the gas valve control knob. Continue
holding the knob for at least one minute. Immediately
measure the voltage between the two wires of the pilot
generator. If the meter does not show at least 700mV,
replace the pilot generator.
10.4.3 Fusible Link
Check the voltage going to the safety circuit. Be
sure that the pilot generator is correctly wired to the
gas valve, the pilot is lit and the control knob on the
gas valve is in the "PILOT" position. Leave the red
voltmeter lead in place at test point 1. Touch the black
lead of the meter to the terminal of the fusible link
where the white wire from the gas valve is connected
(test point 3).
If no voltage is detected at test point 3, the wire
between the gas valve and the fusible link is broken.
Replace the wire.
If there is a minimum of 220mV at test point 3,
move the black meter lead to the other terminal of the
fusible link (test point 4).
If no voltage is detected at test point 4, the
fusible link has failed. This indicates higher than
normal temperatures in the component compartment
(vestibule). Normal component compartment temperature is well below 300
o
F. The fusible link is designed
to fail at temperatures above 305°F. Excessive temperature might be due to a blocked fl ue or heat exchanger.
Clean the heat exchanger and clear the fl ue and vent
of any restrictions. Sometimes the fusible link fails
due to fl ame roll-out. Flame roll-out may be caused
by delayed ignition or downdrafting in windy areas.
Thoroughly investigate the causes for fl ame roll-out
and correct the problem when replacing the fusible
link.
10.4.4 Fireman Switch and External
Interlocks
Check the voltage going to the external device.
Touch the black lead of the meter to the fi reman switch
terminal strip where the white wire from the fusible
link is connected (test point 5). The meter should read
at least 220mV. If the voltage is less than 220mV, there
may be a bad connection or wire between the fusible
link and the terminal strip. The wire may need to be
replaced. If voltage of 220mV or more is detected at
test point 5, move the black lead of the meter to the
fi reman switch terminal strip connection where the
white wire from the high limit is connected (test point
6). The meter should read at least 220mV. If there is no
voltage, the time clock switch or other external interlock may be mis-adjusted, mis-connected or defective.
Correct this external problem.
10.4.5 Limit Switches
Since the limit switches are not easily accessible,
you can check the voltage going into the component
after the limit switches in the circuit. If voltage is
detected there, then the limit switches are closed and
are operational.
Check the voltage going to the water pressure
switch. Leave the red voltmeter lead in place at test
point 1. Touch the black lead of the meter to the terminal of the water pressure switch where the white wire
is connected (test point 11).
If the voltage is less than 220mV, there may be
a bad connection, a partial short or a faulty sensor. If
there is no voltage, one of the limit switches is open.
This is normally due to excessive water tempera-
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
Page 37
ture, which should be thoroughly investigated before
replacement of limit switches. Excessive water temperature may be caused by low water fl ow. Water fl ow
defi ciency may be due to obvious problems such as a
defective pump or blocked water fi lter. Alternatively,
excessive water temperature may be due to over-fi ring,
or to a problem with the water piping or the heater's
internal bypass control. Over-fi ring might be a result
of an incorrect gas orifi ce or supply of propane gas to a
heater intended for natural gas.
If there are no such fundamental problems,
identify which of the switches is open. Limit switch
access is through the limit switch plugs on the inlet/
outlet header. Remove the limit switch plugs from
the bottom of the header and gently remove the limit
switches from the wells. Move the black lead of the
meter to the terminal on the 150°F limit switch (test
point 7) that is connected to the fi reman switch termi-
nal block. Less than 220mV at this point means that
the wire between the terminal block and the limit
switch has a poor or broken connection or a partial
short. Replace the wire assembly. If at least 220mV is
detected at test point 7, then move the black lead of the
meter to the other terminal of the 150°F limit switch
(test point 8). Low or no voltage here means that the
limit is open and must be replaced.
If 220mV or more is detected at test point 8,
move the black lead of the meter to the terminal on the
130°F limit switch (test point 9) that is connected to
the 150°F limit switch. Less than 220mV at this point
means that the wire between the two limit switches has
a poor or broken connection or a partial short. Replace
the wire assembly. If at least 220mV is detected at test
point 9, then move the black lead of the meter to the
other terminal of the 130°F limit switch (test point
10). Low or no voltage here means that the limit is
open and must be replaced. If voltage is detected at
test point 10, move the black lead of the meter to the
terminal of the water pressure switch where the white
wire from the high limits is connected (test point 11).
Less than 220mV at this point indicates that the wire
connecting the high limits to the water pressure switch
is faulty or poorly connected. Correct the problem or
replace the wire.
NOTE The limit switches have different trip points,
and it is important that replacements are
correct. The 150°F switch has a red dot on the
top of the switch, and must be installed in the
rear port of the header. The 130°F switch has
no dot and must be installed in the front port of
the header.
10.4.6 Water Pressure Switch
If the meter shows at least a 220mV signal at test
point 11, move the black lead of the meter to the other
terminal on the water pressure switch (test point 12).
If there is no voltage, the pressure switch contacts
are open. This is almost always due to a water fl ow
defi ciency, the most common one being a blocked water
fi lter or defective pump. However, sometimes it is due
to blockage of the copper tube or mis-adjustment of
the switch. Investigate thoroughly, referring to Section
7.5 on “Water Pressure Switch Adjustment”. If there
is no problem with the pool system or pressure switch
adjustment, replace the pressure switch.
10.4.7 Temperature Control Circuit
The temperature control circuit consists of four
(4) major components which must all be working
correctly for the signal to be transmitted to the gas
valve. The four components are the ON/OFF toggle
switch, the variable temperature control (potentiometer), the temperature sensor (thermistor) and the
temperature control board. Use the following procedure to check each component for functionality.
Check the temperature control as a complete
circuit before checking each component individually.
With the red lead of the meter still at test point 1, place
the black lead of the meter on the TH terminal of the
temperature control circuit board (test point 16). If the
meter shows more than 220mV at the pressure switch
(test point 12) but not at test point 16, then one of the
components of the temperature control circuit is faulty.
Proceed with the following sections to test the components.
10.4.7.1 ON/OFF Toggle Switch
Remove the temperature control panel from the
bezel on the front of the heater to gain access to the
switch. Be sure that the toggle switch is in the "ON"
position. Place the black lead of the meter on the
toggle switch terminal (test point 13) that is connected
to the pressure switch. Less than 220mV at this point
indicates that there is a problem with the black wire
that connects the pressure switch to the toggle switch.
If at least 220mV is detected at test point 13, move the
black meter lead to the other terminal on the toggle
switch (test point 14). A reading of less than 220mV
here indicates a faulty switch. If the reading is more
than 500mV, turn the switch "OFF" and then "ON"
again to be sure that the internal contacts are working
correctly. The volt meter reading should drop to zero
when the switch is "OFF" and return to at least 220mV
when the switch is placed back in the "ON" position.
10.4.7.2 Variable Temperature Control
The variable temperature control is a 0-10,000
ohm variable resistor. Set your ohmmeter to the 0-20K
range. Remove the temperature control wires from
the control circuit board. Place one lead of the meter
on each of the wires (test points 18 & 19). With the
control set to MIN the meter should read near 10,000
ohms. Now turn the control to the MAX position. The
meter should read close to zero. If the meter shows an
Page 38
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
open circuit, or readings outside of the range stated
above, replace the controller. If the control is working
correctly, reconnect the wires to the circuit board.
10.4.7.3 Temperature Sensor
The temperature sensor is a 0-20,000 ohm
thermistor. Set your ohmmeter to the 0-20K range.
The meter readings will depend on the temperature of
the water in the header. See Table 9 for approximate
readings at various temperatures.
To test the temperature sensor, circulate water
through the heater for fi ve (5) minutes. Remove the
temperature sensor wires from the temperature control
board. Place one lead of the meter on each wire of the
temperature sensor (test points 20 & 21). Record the
reading. Measure and record the water temperature
of the pool near the inlet of the fi lter system. Find
the temperature in the chart that is closest to your
temperature reading of the pool water. Compare your
ohmmeter reading to the resistance number in the
chart. Remember that this is an approximate reading
and numbers may vary. If your reading is close to the
numbers indicated in the chart then the temperature
sensor is working correctly. Reconnect the wires to
the circuit board. If your reading is vastly different or
outside of the ranges shown the temperature sensor
should be replaced.
Section 11. Replacement Parts
11.1 Ordering Information
To order or purchase parts for the Legacy pool
and spa heater, contact your nearest Jandy dealer or
distributor. See the web site at www.jandy.com for the
nearest service center. If they cannot supply you with
what you need, contact Customer Service at Zodiac
Pool Systems, Inc., Telephone (800) 822-7933.
NOTE To supply the correct part it is important that
you state the model number, serial number
and type of gas when applicable. This
information is on the rating plate inside the
heater.
The following pages contain a parts list, general
exploded view, and detailed exploded views to aid in
pats identifi cation. Pleas refer to these pages when
ordering parts for your Legacy pool/spa heater.
Table 9. Temperature Sensor
WATER TEMP. IN
HEADER °F (°C)
50 (10) 19.9
60 (15) 15.3
70 (21) 11.9
80 (26) 9.3
90 (32) 7.3
100 (38) 5.8
APPROX. RESISTANCE IN 1000'S
OF OHMS (kOhms)
10.4.7.4 Temperature Control Circuit Board
With the red lead of the meter still at test point
1, place the black lead of the meter on the TH/PP
terminal of the temperature control circuit board (test
point 15). If there is more than 220mVDC at this point
but not at the TH terminal of the temperature control
circuit board (test point 16) as tested in section 10.4.7,
then the control circuit board is faulty. Replace the
board.
All trademarks used herein are the property of their respective owners.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
11.2 Parts List
Key
No. Description
Pilot/Igniter System
1 Pilot, Main Burner Assembly, Natural All R0494700
1 Pilot, Main Burner Assembly, Propane All R0494800
2 Pilot Burner, Natural All R0492900
2 Pilot Burner, Propane All R0493000
3 Pilot Electrode All R0471400
4 Pilot Generator All R0471500
5 Ceramic Insulator All R0471600
6 Burner, Main w/ Pilot Bracket All R0471700
7 High Voltage Lead Assembly All R0493400
8 Pilot Tubing All R0037000
9 Piezo Lighter Assembly All R0355900
10 Mounting Bracket Assembly All R0471800
Main Gas Assembly
11 Burner Tray Assy, Natural 125-400 R0471101-05
11 Burner Tray Assy, Propane 125-400 R0471201-05
12 Burner Tray, Shelf Only 125-400 R0469101-05
13 Gas Valve, Natural All R0493100
13 Gas Valve, Propane All R0493200
14* Orifi ce Set, Natural Gas, 0-3K ft. All R0469200
14* Orifi ce Set, Natural Gas, 3-6K ft. All R0469300
14* Orifi ce Set, Natural Gas, 6-10K ft. (US only) All R0469400
14* Orifi ce Set, L.P. Gas, 0-5K ft. All R0469500
14* Orifi ce Set, L.P. Gas, 5-10K ft. (US only) All R0469600
15 Manifold Assy, Natural Gas, 0-3K ft. 125-400 R0496101-05
15 Manifold Assy, Natural Gas, 3-6K ft. 125-400 R0496201-05
15 Manifold Assy, Natural Gas, 6-10K ft. (US
only)
15 Manifold Assy, L.P. Gas, 0-5K ft. 125-400 R0496401-05
15 Manifold Assy, L.P. Gas, 5-10K ft. (US only) 125-400 R0496501-05
16 Anti-Rotation Bracket All R0469700
17 Burner, Main All R0469800
18 Burner Manifold 125-400 R0469901-05
Electrical System
19 Temp Control/User Interface All R0471901
20 Temp Control/User Interface w/ Bezel All R0491700
21* Wire Harness Set All R0472400
22 On-Off Switch All R0099800
23 Temperature Control Label All R0472100
24 Pool/Spa Control All R0472500
25 Temperature Sensor (Regular) All R0456500
26* Temperature Sensor (Salt) All R0477300
27 Gasket, Temperature Control Bulb All R0456600
28 Thermostat Knob, Black All R0010700
29 Stop Plate, "Temp-Lok" All R0472200
30* Temperature Control Gasket All R0472300
31 Temperature Control Plate Assembly All R0472001
32* Stop Plate Screw All R0474600
33 Nut, Sensor Retainer All R0523900
34 Cap, Sensor & Pressure Switch w/ O-Ring All R0455400
35 Pressure Switch, 2 PSI All R0013200
36* Pressure Switch, 1-10 PSI All R0015500
37 Water Pressure Switch Tubing All R0483600
37* Water Pressure Switch Tubing, Long All R0483601
38 High-Limit Switch Assembly All R0457401
39 High Limit Set (130°F & 150°F) All R0457200
40 High-Limit Switch, 130°F All R0457300
41 High-Limit Switch, 150°F All R0023000
Model No. Order
Part No.
125-400 R0496301-05
Page 39
Key
No. Description
Electrical System (Continued)
42 Fusible Link Assembly All R0012200
43 Fusible Link Bracket All R0337200
44 Terminal Block All R0097800
Vent System
45 Top Enclosure 125-400 R0470301-05
46 Vent Cover 125-400 R0470401-05
47 Rainshield (Partition) 125-400 R0478201-05
48 Flue Collector Assembly 125-400 R0470501-05
49 Outdoor Vent Cap 125-400 R0491601-05
50 Indoor Draft Hood 125-400 R0499601-05
51 Adapter Plate 125-400 R0478301-05
52* Clip All R0500200
Water System-Polymer
53 Inlet/Outlet Header Assy, Polymer 125-400 R0470800
54 Return Header Assy, Polymer All R0454200
55* Header Hardware Set, Polymer All R0454500
56 Heat Exchanger Assembly, Complete, Copper 125-400 R0470606-10
56 Heat Exchanger Assembly, Complete, CuNi 125-400 R0500706-10
57 Heat Exchanger Drain Plugs (2), Polymer All R0446000
58 3" Coupling Nut Kit w/ O-ring All R0454000
59 Bypass Assembly, Polymer 125-400 R0453700
60 Bypass Spring, Adjustable, Polymer All R0453900
61 Tailpiece w/ Union Nut (Set of 2), Polymer All R0449000
Water System-Bronze
62 Heat Exchanger Assy, Complete, Copper 125-400 R0470706-10
62 Heat Exchanger Assy, Complete, CuNi All R0500806-10
63 Inlet/Outlet Header Assy, Bronze, 2" 125-400 R0476601-05
64 Return Header Assy, Bronze (includes set of
9 gaskets)
65 Bypass Assembly, Bronze 125-400 R0476801-05
66 Bypass Spring, Bronze 125-400 R0476901-05
67 Bypass Gasket, Bronze All R0011400
68 Heat Exchange Hardware Kit, Bronze All R0477200
69 Temp Sensor Mounting Bracket, Bronze All R0477400
70 Water Pressure Switch Tubing, Bronze All R0477501
71 Flange & Gasket Kit, Bronze All R0461500
72 Flange Bolts, Bronze All R0477800
73 3/4 NPT Plug, Bronze All R0477900
74 Header, Drain Plug, Bronze All R0478000
Water System-All
75 Header Gasket Assembly (Set of 16) All R0454300
76* Bypass Hardware, Gaskets All R0453800
77 Heat Exchanger Tube Assy, Copper 125-400 R0490101-05
78 Heat Exchanger Tube Assy, CuNi 125-400 R0490301-05
79* Baffl es, Heat Exchanger 125-250 R5000001-03
80 Plug, Sensor All R0456800
Firebox Components
81 Combustion Chamber Panels 125-400 R0494906-10
Jacket Components
82 Door with Latch 125-400 R0470901-05
83 Latch Assembly All R0334900
84 Grommet, Sealing, 2" All R0460300
85 Button Plug, 7/8" All R0491100
86 Rear Panel Assy 125-400 R0482301-05
87 Side Panel, Right All R0482400
88 In/Out Cover Panel, Top All R0482500
89 In/Out Cover Panel, Bottom All R0482600
90 Side Panel, Left All R0482700
Model No. Order
Part No.
All R0476700
Page 40
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
11.2 Parts List (Continued)
Key
No. Description
Jacket Components (Continued)
91 Return Side Cover, Top All R0482800
92 Return Side Cover, Bottom All R0482900
93 Heat Shield 125-400 R0483101-05
94 Heat Defl ector Guard, Front 125-400 R0483201-05
95 Rear Partition 125-400 R0483401-05
96 Heat Defl ector Guard, Rear 125-400 R0483501-05
97 Controller Mounting Panel 125-400 R0483901-05
98 Weather Stripping All R0491000
99 Grommet, 7/8" All R0492800
Optional Components
100* Noncombustible Base 125-400 R0471001-05
101* Press Relief Valve Kit, 75 PSI, Bronze All R0040400
102* Press Relief Valve Kit, 75 PSI, Polymer All R0336100
103* Touch-up Spray Paint, Pewter All R0335800
104* Temp Rise Measurement Kit All R0336000
NOTES:
1. All hardware sets contain all pieces necessary for assembly, including gaskets.
2. Gaskets and hardware are included in all kits that involve the removal of a
gasket as part of the procedure to replace a part.
* PARTS NOT SHOWN ON KEY VIEW
** MANIFOLD KIT INCLUDES INSTALLED ORIFICES BUT DOES NOT
INCLUDE GAS VALVE
Model No. Order
Part No.
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
11.3 General Exploded View
Page 41
46
49
85
92
50
51
91
45
47
48
90
86
54
56
81
98
97
83
20
84
82
43
42
93
11
16
94
96
81
53
95
35
37
88
89
99
87
Page 42
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
11.4 Detailed Exploded View
9
31
23
22
57
15
13
44
18
17
77,78
29
28
19
24
1
12
2
6
4
10
3
5
7
8
75
58
27
33
25
34
40
57
59
60
61
39
41
38
Legacy™ Model LRZM Pool/Spa Heater Installation and Operation Manual
53
80
63
62
70
Page 43
74
64
75
66
77,78
65
67
75
65
40
38
35
73
74
41
72
71
68
25
69
© 2010 Zodiac Pool Systems, Inc. 1007
H0299600D
Zodiac Pool Systems, Inc.
6000 Condor Drive, Moorpark, CA, USA 93021 • 800.822.7933 F
AX 877.327.1403
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