Zodiac Jandy Legacy LRZ Millivolt User manual
WARNING
FOR YOUR SAFETY: This product must be installed and serviced by a contractor who is licensed and qualified
in pool equipment by the jurisdiction in which the product will be installed where such state or local requirements
exists. In the event no such state or local requirement exists, the installer or maintainer must be a professional with
sufficient experience in pool equipment installation and maintenance so that all of the instructions in this manual
can be followed exactly. Before installing this product, read and follow all warning notices and instructions that
accompany this product. Failure to follow warning notices and instructions may result in property damage, personal
injury, or death. Improper installation and/or operation can create carbon monoxide gas and flue gases which can
cause serious injury, property damage, or death. For indoor installations, as an additional measure of safety, Zodiac
Pool Systems, Inc. strongly recommends installation of suitable Carbon Monoxide detectors in the vicinity of this
appliance and in any adjacent occupied spaces. Improper installation and/or operation will void the warranty.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
If these instructions are not followed exactly, a fire or explosion may result,
causing property damage, personal injury, or death.
H0299600 Rev G
Page 3
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
1.1 Introduction .......................................................5
1.2 Consumer Information and Safety ....................5
1.2.1 Spa/Hot Tub Safety Rules ..........................5
1.2.2 Swimming Pool Energy Saving Tips ..........6
1.3 Warranty ...........................................................6
1.4 Codes and Standards .......................................6
1.5 Technical Assistance .........................................7
1.6 Materials Installer Must Provide ........................7
1.6.1 Materials for All Applications ......................7
1.6.2 Materials for Special Applications ..............7
1.7 Specifications ....................................................7
1.7.1 General Specifications ...............................7
1.7.2 Dimensions ................................................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
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
4.1 Gas Supply and Piping ...................................14
4.2 Manifold Pressure ...........................................15
4.3 Special Precautions for LP Gas ......................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
6.1 Main Power .....................................................21
6.2 Bonding ...........................................................21
6.3 Auxiliary Time Clock Wiring ............................21
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
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
9.1 General Heater Troubleshooting .....................31
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 ..........................................37
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 ...........38
10.4.7.3 Temperature Sensor ..........................38
10.4.7.4 Temperature Control Circuit Board ....38
Page 4 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
11.1 Ordering Information .......................................38
11.2 Parts List .........................................................39
11.3 General Exploded View ..................................41
11.4 Detailed Exploded View ..................................42
Page 5
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
This manual provides installation and operation
instructions for the Legacy Model LRZ millivolt pool
and spa heater. Read these installation and opera-
tion instructions completely before proceeding with
the installation. Consult Zodiac Pool Systems, Inc., or
local factory representative, with any questions regard-
ing this equipment.
Certain sections of this manual are specic 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 specically 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 applica-
tions.
“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 ow rate is within
30-125 gpm (110-475 lpm).
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 identied by
the " " symbol. Be sure to read and comply with all
of the warnings and cautions.
The following “Safety Rules for Hot Tubs,” recom-
mended by the U.S. Consumer Product Safety
Commission, should be observed when using the
spa.
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.
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.
La U.S. Consumer Product Safety Commission
indique que des températures de l'eau élevées peu-
vent être dangereuses. Voir la notice d'installation
et de fonctionnement pour le réglage de la tempéra-
ture.
1. Spa or hot tub water temperature should never
exceed 104°F (40°C). One hundred degrees
Fahrenheit (100°F [38°C]) is considered safe for
a healthy adult. Special caution is recommended
for young children.
2. The drinking of alcoholic beverages before or
during spa or hot tub use can cause drowsiness
which could lead to unconsciousness, and subse-
quently result in drowning.
3. Pregnant women take note! Soaking in water
above 102°F (38.5°C) can cause fetal damage
during the 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 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | 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
Zodiac Pool Systems, Inc. offers the following
recommendations to help conserve fuel and minimize
the cost of operating your pool heater without sacri-
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.
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 prevail-
ing 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 lter systems.
The Legacy heater is sold with a limited factory
warranty. Details are specied 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 eld
modication. Also, damage to the heat exchanger by
corrosive water is NOT covered by the warranty. See
Section 8.1 for maintaining proper pool water chemis-
try.
Keep this manual in a safe place for future
reference when inspecting or servicing the
heater.
The Legacy pool and spa heaters are design
certied 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.
In the absence of local codes, refer to the latest
edition of the following national codes for installation:
1. In the United States, the "National Fuel Gas
Code", NFPA 54/ANSI Z223.1. Pay particular
attention to the chapter addressing "Venting of
Equipment".
2. In Canada, "The Natural Gas and Propane Instal-
lation Code", CAN/CSA-B149.1. However, for
minimum combustion air requirements, Table
3 of this manual MUST be followed for proper
and safe operation. The Jandy LRZ millivolt
heater may not operate properly when installed
with the only the minimum combustion air
openings allowed in CAN/CSA-B149.1.
Any changes to the heater, gas controls, gas
orices, wiring, draft hood, vent cap, or improper
installation may void the warranty. If change is
required to any of the above, consult the factory.
Page 7
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
Consult Zodiac Pool Systems, Inc. or your local
Jandy distributor with any questions or problems
involving the specications, installation, and opera-
tion of your Jandy equipment. An experienced techni-
cal support staff is ready to assist you in assuring the
proper performance and application of Jandy products.
For technical support call the Technical Support
Department at (800) 822-7933.
The following items are needed and are to be
supplied by the installer for all Legacy heater installa-
tions:
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.
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. Installation Location:
Certied 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 Materi-
al:
See Table 2 in Section 2.3.2
3. *Gas Pipe/Heater Gas Valve Connection:
Natural Gas: 3/4" NPT
LP: 3/4" NPT
*For diameter of gas line from meter to heater see Table 4 in
Section 4.1.
4. Supply Gas Type:
Certied for use with:
Natural Gas or Liqueed Petroleum Gas (LP
Gas or Propane Gas).
5. Inlet Gas Supply Pressure:
Minimum Maximum
Natural Gas: 5.5 "WC 10.0 "WC
LP Gas: 10.0 "WC 14.0 "WC
6. Water Pipe/Heater Connection:
*2" Unthreaded PVC or CPVC
*Other size pipes may be used. See Section 5.5 for details
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
Section 1.7.2, "Dimensions".
10. Electrical Supply: None (the Legacy LRZ milli-
volt heater is a millivolt heater with a standing
pilot ignition).
11. Modication of Heater for High Altitude:
The Legacy model LRZ millivolt heater is
normally shipped from the factory in the low
altitude (sea level) operational conguration.
When requested, the heaters can be cong-
ured and shipped for higher altitudes. For eld
conversions to change altitude congurations,
manifold kits for mid altitudes and high altitudes
Page 8 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
are available from your Jandy dealer or by
contacting the Technical Support 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 denes 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.
NATURAL GAS
ALTITUDE
DESIGNATION
UNITED
STATES
CANADA
LOW ALTITUDE 0-3000 FT 0-2000 FT
(0-610 m)
MID ALTITUDE 3001-6000 FT 2001-4500 FT
(611-1370 M)
HIGH ALTITUDE 6001-10,000 FT NOT
APPLICABLE
LP
LOW ALTITUDE 0-5000 FT 0-4500 FT
(0-1370 M)
HIGH ALTITUDE 5001-10,000 FT NOT
APPLICABLE
See Figure 1 for a diagram showing the heater's
exterior dimensions and dimensions to critical connec-
tions on the heater.
Improper installation or maintenance can cause
nausea or asphyxiation from carbon monoxide in
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.
Une installation ou un entretien inadéquat peut
causer la nausée ou l’asphyxie en raison du
monoxyde de carbone présent dans les gaz de
combustion et même entraîner des blessures
graves ou la mort. Pour les installations intéri-
eures, comme mesure de sécurité additionnelle,
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 draft-
hoods 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-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 oor-
ing
3. Sufcient combustion and ventilation air
4. Properly sized gas meter and piping
5. Proper electrical wiring (if required)
6. Adequate water ow
This manual provides the information needed to
meet these requirements. Review all application and
installation procedures completely before continuing
the installation.
The Legacy heater is shipped from the factory
with the top assembly in the low-prole conguration
for outdoor installation. The Legacy heater is design
certied for indoor installation (U.S. only) when
equipped with a draft hood, which must be installed
without modication.
The Legacy heater is also certied 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.
When pool equipment is located below the pool sur-
face, a leak from any component can cause large
scale water loss or ooding. Zodiac Pool Systems,
Inc., cannot be responsible for such water loss or
ooding or resulting damage.
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.
Page 9
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
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 ow around the heater.
All criteria given in the following sections
reect 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, proxim-
ity and height of walls that may block ventilation, and
proximity to public access areas.
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 avail-
able 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 devic-
es must have a minimum 18 inches (457mm) clearance
above the oor.
This heater must be installed at least ve (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.
A7 5/8"
39 3/8"
2 3/4"
10 3/8"
16"
5" 8"
28 1/2"
13 1/8"
H
41"
Model
Heater Width
Dim "A"
Venting Dimensions
Firing Rate
Vent Diameter U.S. Outdoor
Dimension "H"
U.S. Indoor or
CAN Outdoor Shelter
Dimension "H"
in. cm in. cm in. cm in. cm BTU/HR kcal/HR
125 15⅛ 38 6 15 18 46 24⅛ 61 125,000 32
175 18⅛ 40 6 15 18 46 24⅛ 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
Page 10 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
The heater must be installed on a level surface
of noncombustible construction or on re-resistant
slabs or arches. Noncombustible ooring is dened
as ooring material and surface 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 oor without placing a noncombustible platform
between the oor and the heater.
The heater can be installed on a combustible
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 extend-
ing 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 oor of the
alcove must be covered by a noncombustible panel.
Legacy heaters can be installed in the low-prole
top conguration 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-
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 10 feet (3.0 m) from any building
opening. See Figure 3.
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)
1. Blocks must provide a solid base and be braced so they
cannot slip out of place.
2. Air openings in blocks must be arranged to provide unre-
stricted opening through entire width or length of base.
3. Sheet metal must be at least 24 ga. and extend 6" beyond
the heater jacket on all sides.
SIDE OF
HEATER
INDOOR (OUTDOOR
SHELTER) INSTALLATION
OUTDOOR INSTALLATION
INCHES CENTIMETERS INCHES CENTIMETERS
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*
Sheet Metal Min.
Thickness 24 Ga
Hollow Concrete Block
Platform (In Canada - Two
continuous courses of
90mm (4 in.) thick hollow
masonry units.)
Page 11
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
Do not install the heater with the top of the vent as-
sembly within 4 feet (1.22 m) horizontally and 4 feet
(1.22 m) vertically of any opening into a building.
Do not install the heater with the top of the vent as-
sembly within 10 feet (3.05 m) of any opening into a
building.
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 ouver-
ture d’un bâtiment.
The top surface of the heater must be at least
three (3) feet (0.9 m) above any forced air inlet, or
intake ducts located within 10 feet (3.05m) horizon-
tally.
If the heater is installed under an overhang, there
must be a minimum clearance of ve (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
aillie 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 deection off nearby
structures might cause downdraft conditions. Where
downdraft conditions exist, locate the heater at least
three (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 secure-
ly fastened to the equipment pad. Use a size
1/4" x 2-1/4" long galvanized or plated 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.
An outdoor shelter (Canada only) is an unoccu-
pied enclosure which does not communicate directly
with occupied areas. All indoor installations and
outdoor shelter installations require a factory approved
vent collar. The vent collar must be installed without
modication and in accordance with the instructions
provided by the manufacturer.
Une remise extérieure (au Canada seule-
ment) est un endroit inoccupé qui ne communique
pas directement avec les endroits occupés. Toutes
les installations intérieures et remises extérieures
exigent l’addition d’une cheminée approuvée par le
manufacturier. La cheminée doit être installée sans
aucune modication 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
1/4” X 2-1/4”
GALVANIZED OR PLATED
CONCRETE SCREWS
Page 12 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
and combustion air are essential for the safe and
efcient 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.
The heater location must provide sufcient air
supply for proper combustion and ventilation of the
surrounding area as outlined in the latest edition of
ANSI standard Z223.1 (NFPA 54). The minimum
allowable combustion air opening in the Canadian
Natural Gas and Propane Installation Code (CAN/CSA
B149.1) are not sufcient for safe and proper operation
of the Legacy Model LRZ millivolt heaters. Combus-
tion air openings must be followed per the require-
ments of ANSI Z223.1 (NFPA 54) and Table 3.
In general, these requirements specify that the
room in which a heater is installed should be provided
with two permanent air supply openings; one within
12 inches (305mm) of the ceiling, the other within
12 inches (305mm) of the oor. All indoor installa-
tions must have openings to outside air for combus-
tion, ventilation, and dilution of 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. For combustion air supply openings,
however, the requirements of Table 3 MUST
be followed for safe and proper operation. The
minimum combustion air openings allowed in CAN/
CSA B149.1 are NOT sufcient for the model LRZ
millivolt heaters.
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 ow
area for each 2000 BTU/h (0.6 kW).
3)
1. Use approved
roof jack.
Required Net Free Open Area*
for Combustion Air Openings
*Area indicated is for one of two openings; one at oor level and
one at the ceiling, so the total net free area would be double the
gures indicated. For special conditions, refer to NFPA54 ANSI
Z223.1.
The
minimum allowable combustion air openings in the Canadian
National Standards CAN/CSA B149.1 are not adequate for proper
operation of the LRZ millivolt heaters.
Note: If using screens and/or metal louvers, compensate by adding
50% additional area to each opening. If using wood louvers each
opening must be at least four times the area indicated in the table
above.
Model Direct from outside Duct from outside
in2cm2in2cm2
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
Page 13
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
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 verti-
cal 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.
Vent pipe diameter must be as required by the Na-
tional fuel Gas Code ANSI Z223.1 or the Canadian
Installation Codes for Gas Appliances CAN/CSA-
B149.1. Undersize pipe can result in inadequate
venting and oversize pipe can result in vent conden-
sation. In either case the result can be release of
combustion products to the indoors. This can cause
serious injury or death by carbon monoxide poison-
ing or asphyxiation.
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 inadé-
quate et des tuyaux trop gros risquent de provoquer
une condensation dans les tuyaux. Dans un cas
comme dans l’autre, des produits de combus-
tion 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
modication.
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.
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 ow.
These requirements are summarized in Table
3. Note that the areas specied are net free areas and
should be increased by 50 percent when the openings
are covered by screens, louvers, grills or other protec-
tive covers. See Figure 5 and Table 3.
Except for the combustion air openings
requirements, in Canada, follow Canadian
Standard, CAN/CSA-B149.1 or local codes.
Follow the requirements of Table 3 for the
minimum combustion air openings required.
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 ue products to accumulate in the
room. Additional air must be supplied to compensate
for such exhaust.
The information in Table 3 is not applicable in
installations where exhaust fans or blowers of any type
are used. Such installations must be designed by quali-
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, perchloro-
ethylene, chlorine, etc.
Do not store any chemicals, cleaners, or other cor-
rosive material near combustion air openings or in
the room. Avoid locating dryer vents in the vicin-
ity of combustion air openings. Failure to prevent
corrosive materials from mixing with combustion air
can result in reduced heater life and unsafe heater
operation.
N’entreposer aucun produit chimique, produit net-
toyant 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.
For outdoor installations, exhaust venting consid-
erations will determine the placement of the heater, see
Section 2.3.4.
Page 14 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
Avoid terminating heater vents near air condi-
tioning or air supply fans. The fans can pick up
exhaust ue products from the heater and return them
inside the building, creating a possible health hazard.
Do not locate the vent terminal where 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 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 connec-
tions 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
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, termi-
nating 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 ue products, see Figure 5. The top of the vent cap
must be at least 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
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
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.
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.
Review the following general instructions before
continuing the installation.
Do not install LP gas units indoors.
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.
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 liquéé (GPL). Vériez l’information
inscrite sur la plaque signalétique du panneau
intérieur pour vous assurer que l’appareil est conçu
pour le type de gaz fourni.
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 certied to operate within the altitude
range indicated on the rating plate. If a eld
conversion to a different altitude range should be
necessary, manifold kits are available for chang-
ing 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 ll out the altitude conversion label, included
in the kit. Apply the label next to the original
rating plate.
Permanent damage to the gas valve will occur if the
following procedures are not followed.
Vous endommagerez la soupape de gaz si vous ne
respectez pas les procédures suivantes.
Page 15
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
3. Use the 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.
APPROVED 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 ow to the heater.
6. Disconnect the heater and its individual shutoff
valve from the gas supply system during pressure
testing of the system at pressures higher than 1/2
pounds per square inch (psi) (3.45 kilopascals
[kPa]). If the test pressure is equal to or less than
1/2 psi (3.45 kPa), close the manual shutoff valve
on the heater during the piping pressure test.
7. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the heater, a restrictive tting, or an undersized
gas meter. Gas supply pressures to the heater are
listed in Table 5.
The maximum inlet gas pressure must not
exceed the specied 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 ame.
Some leak test solutions (including soap and water)
may cause corrosion or stress cracking. Rinse the
piping with water after testing.
Certaines solutions d’essai d’étanchéité (y compris
l’eau et le savon) peuvent causer de la corrosion
ou de la ssuration. Rincez les tuyaux à l’eau après
l’essai d’étanchéité.
Conrm 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 tting, or an undersized gas meter. Gas
supply pressures to the heater, when it is operating, are
listed in Table 5.
Manifold gas pressure for the Legacy natural gas
heaters should be set at WC. Propane heaters
should be set to 9" WC.
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.
Supply Pressure Minimum Maximum
Natural Gas 5.5 inches W.C.
(1.4 kPa)
10.0 inches W.C.
(2.5 kPa)
LP Gas 10.0 inches W.C.
(2.5kPa)
14.0 inches W.C.
(3.5 kPa)
Manifold Pressure Nominal
Natural Gas 4.0 inches W.C. (1.0 kPa)
LP Gas 9.0 inches W.C. (2.2 kPa)
Distance from Gas Meter
Heater
Size
0-50 feet
(0-15 m)
50-100 feet
(15-30 m)
100-200 feet
(30-60 m)
in. mm in. mm in. mm
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
*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.
2. Check supply pressure and local code requirements before
proceeding with work.
3. Pipe ttings must be considered when determining gas
pipe sizing.
Page 16 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
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 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, rst remove the slotted cap on the top of the
gas valve to the right of the control knob. Under the
slotted cap is a slotted plastic screw which increases
the manifold pressure when turned clockwise and
decreases the manifold pressure when turned counter-
clockwise.
After measurements, and adjustments if neces-
sary, have been made, make sure to replace the 1/8"
NPT plug on the manifold pressure ports, and the
cap on the manifold pressure adjustment screw. It
is extremely important to replace these parts before
leaving the installation. Failure to do so can result in
damage to property or injury or death.
With the heater ring, the pressure must be
within the range shown in Table 5. Also check the
pressure with the heater off.
LP Gas is heavier than air and can therefore more
readily collect or “pool” in enclosed areas if provision
for proper ventilation is not made. Installation of pool
heaters in enclosed areas such as pits is not recom-
mended. 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
re protection authorities about specic installation
restrictions in your area.
For ALL installations the combustion air
openings requirements of Table 3 and NFPA54
/ ANSI Z223.1 MUST be followed for safe and
proper operation.
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 accom-
modate 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.
AQUAPURE
MANUAL BY-PASS DETAIL
MANUAL BY-PASS IS USED
WHEN FILTRATION RATE
EXCEEDS 125 GPM
Page 17
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
Note that when pool equipment is located below
the pool surface a leak can result in large scale water
loss or ooding. Zodiac Pool Systems, Inc. cannot
be responsible for such water loss or ooding or the
damage caused by it.
For special installations such as water connec-
tions below the water level of the pool, or for other
questions contact the Zodiac Technical Support
Department at (800) 822-7933.
The heater must be protected from back-siphon-
ing of water, which can result in dry starts. If there is
any chance of back-siphoning, provide a check valve
between the pool and the 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.
The inlet/outlet header of the Legacy comes
equipped with an automatic ow control valve. The
automatic ow control valve maintains the proper
ow through the heater at rates up to approximately
125 Gallons Per Minute (GPM) (475 liters per minute
[LPM]). If the lter system ow rate is higher than
approximately 125 GPM (475 LPM), install a manual
bypass valve, see Figure 7, then perform a tempera-
ture rise test, see Section 7.6 and adjust the ow using
the bypass valve until the proper temperature rise is
obtained.
Reversing the header requires a longer
syphon tube, order part number R0483601.
The Legacy heater is shipped with water connec-
tions on the right side, but can be modied in the eld
to provide left-side water connections. This proce-
dure involves removing the heat exchanger headers
and reinstalling them on opposite ends of the tube
assembly. Some of the heater wiring must be discon-
nected 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 proce-
dure. These instructions have been written to include
the steps needed when reversing the water connec-
tions 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:
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. Bypass
Assembly
REAR PANEL
TOP PANEL
RIGHT SIDE PANEL
LEFT SIDE PANEL
RETURN HEADER SIDE
COVER PLATES
TOP AND BOTTOM
FRONT PANEL
(DOOR)
CONTROL PANEL
BASE
IN/OUT HEADER
SIDE COVER PLATES
TOP AND BOTTOM
VENT TOP
Page 18 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
Do not reverse the position of the bypass.
13. Thread on the 10 bolts and washers and hand
tighten.
14. Place the return header over the bolts and gasket-
ed tubes on the right side of the tube assembly.
Align the bolt and tube holes in the header with
the bolts and tubes in the header bar and slide the
assembly together.
15. Thread on the 10 bolts and washers and hand
tighten.
16. Use a torque wrench to tighten the bolts on each
header to four (4) foot-pounds. The bolts must be
tightened in the sequence indicated in Figure 11.
Failure to tighten the header as indicated in step 16
may cause the header to leak or become perma-
nently damaged from warping.
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.
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.
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.
In order to prevent property damage or injury, en-
sure 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.
An 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 ma-
nipulant 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 10 bolts and washers from the inlet/
outlet header and remove the header from the
tube assembly.
10. Remove the 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.
12. Place the inlet/outlet header over the bolts and
gasketed tubes on the left side of the tube assem-
bly. Align the bolt and tube holes in the header
with the bolts and tubes in the header bar and
slide the assembly together. Refer to Figure 9.
46
5
10
1
8
732
9
Page 19
ENGLISH
Installation and Operation Manual | Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
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.
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.
An d'empêcher des dégâts matériels ou des bles-
sures, assurez-vous qu'aucun des 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).
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 connect-
ed 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 tted to the heater.
To connect a section of 2” PVC or CPVC pipe
to the heater, 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-t side of the coupling
to the end of the pipe. Allow the glue to cure complete-
ly. 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.
A pressure relief valve (PRV) is recommended in
all installations, and is mandatory in any installation
in which the water 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 appli-
cable 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:
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.
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.
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.
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
O-RING
TAILPIECE
UNION NUT
PVC OR CPVC PIPE
Page 20 ENGLISH Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac® | Installation and Operation Manual
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.
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
te 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.
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.
N’utilisez ni pâte à joint ni pâte lubri ante sur le
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.
In order to prevent property damage, do not over-
tighten. Overtightening may crack the header.
A n d'empêcher des dégâts matériels, ne serrez
pas trop. Le serrage excessif peut provoquer des
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 lter
system. The maximum working pressure of the Legacy
heater is 75 psig.
The Legacy heater is manufactured with materi-
als that are not compatible with high concentrations of
ozone, chlorine, bromine, or other sanitizing chemi-
cals. 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
TEMPORARILY INSTALL
BRASS ADAPTER TO
PROTECT PLASTIC
THREADS
START WITH A 1/4" BIT
THEN OPEN HOLE WITH
A 3/8" BIT THEN OPEN
HOLE WITH A 1/2" BIT
RUBBER WASHER
BRASS ADAPTER
PRESSURE RELIEF
VALVE HAND
TIGHTEN ONLY
This manual suits for next models
1
Table of contents
Other Zodiac Swimming Pool Heater manuals
Popular Swimming Pool Heater manuals by other brands
Coates
Coates CE SERIES Installation & operation manual
Raypak
Raypak 207 Brochure & specs
Aqua Comfort
Aqua Comfort XL Series installation manual
Baxi
Baxi Bermuda SL3 Installation and servicing instrucnions
Elecro Engineering
Elecro Engineering FLOW-LINE Installation & operating manual
Hayward
Hayward HeatPro owner's manual
Raypak
Raypak HI DELTA 2072B Specifications
Jandy
Jandy Legacy LRZM Installation and operation manual
STA-RITE
STA-RITE 200K BTU/HR owner's manual
Ecostealth
Ecostealth Heat Pump Pool and Spa Heater operating instructions
Davey
Davey SolarMatic B3P-20 Installation & operating instructions
NuTone
NuTone 9114NT installation instructions
Snugger
Snugger 7 Day Timer Operation manual
Aqua-Hot
Aqua-Hot AHE-200-02S-24 VDC owner's manual
Thermomart
Thermomart DO101-P quick start guide
HeatSeeker
HeatSeeker WBR-17.0H-A owner's manual
Hayward
Hayward Above-Ground Heat Pump owner's manual
Tansun Quartzheat
Tansun Quartzheat Apollo A1A 010 Reference manual