Hayward H135ID User manual

FOR YOUR SAFETY
WARNING: If the information in these
instructions is not followed exactly, a fire or
explosion may result causing property damage,
injury, or death.
- Do not store or use gasoline or other flam-
mable vapors or 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.
POOL AND SPA/HOT TUB HEATERS
H135ID & ABG135 MODELS
SERVICE & INSTALLATION MANUAL
FOR YOUR SAFETY
This product must be installed and serviced by authorized personnel, qualified in pool/
spa heater installation. Improper installation and/or operation can create carbon monoxide gas
and flue gases that can cause serious injury, property damage, or death.
1301503701 Rev B 0917
See www.hayward-pool.com/patent for U.S. and
Canadian patent information
Unit must be installed outdoors only and below an
altitude of 2000 feet

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2CONTENTS
Safety Information .............................................. 3
Section I General information ........................... 7
Introduction .................................................... 7
Warranty Summary......................................... 7
Maintaining proper water chemistry ............... 7
Section II Installation ......................................... 9
Equipment inspection .................................... 9
Important notice ............................................. 9
Conformance with codes ............................... 9
Locating the heater......................................... 9
Flooring ........................................................ 10
Clearances ................................................... 10
Gas supply and piping ................................. 12
Water piping ................................................. 14
Installation above pool surface .................... 15
Chlorinator/chemical feeder ......................... 16
Pressure relief valve .................................... 16
Electrical specifications ................................ 16
Electrical connections .................................. 17
Remote control connection .......................... 17
Section III Check-out & Start-up ..................... 20
General ........................................................ 20
Gas line testing ............................................ 21
Gas pressure testing ................................... 21
Water pressure switch ................................. 22
Two-speed pump ......................................... 23
Temperature adjustment .............................. 24
Temperature lock-out ................................... 25
Fahrenheit v. Celsius ................................... 25
Heating mode .............................................. 25
Retry (Failure of light) .................................. 26
Recycle (Loss of flame) ............................... 26
Keypad inputs .............................................. 26
Automatic reset time .................................... 27
Periodic inspection ...................................... 27
Winterization ................................................ 27
Draining the heat exchanger ....................... 28
Spring start-up ............................................. 28
Section IV Technician Service ........................ 29
General ........................................................ 29
Maintenance ................................................ 29
Heat exchanger inspection and cleaning ..... 29
Combustion chamber .................................. 30
Burner inspection and cleaning ................... 30
Burner removal and replacement ................ 30
Gas valve replacement ................................ 31
Igniter ........................................................... 31
Flame sensor ............................................... 32
Burner orifices ............................................. 32
Gas conversion ............................................ 32
Electrical wiring ............................................ 32
Ignition control system ................................. 32
Blower vacuum switch .................................. 33
High limit switches ....................................... 33
Exhaust gas temp limit .................................34
Thermistor .................................................... 34
Water pressure switch ................................. 34
Transformer ................................................. 35
Blower .......................................................... 35
By-pass service cartridge ............................ 35
Section V Troubleshooting ............................. 36
General ........................................................ 36
Automatic reset time .................................... 36
Supply wiring ............................................... 36
Internal wiring .............................................. 36
Fuse specifications ...................................... 36
Error codes ................................................... 37
Troubleshooting ........................................... 39
Warranty ....................................................... 43
Service Parts ................................................ 45

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SAFETY INFORMATION
Basic safety precautions should always be followed, including the following: Failure to follow instructions
can cause severe injury and/or death.
This is the safety-alert symbol. When you see this symbol on your equipment or in this manual, look
for one of the following signal words and be alert to the potential for personal injury.
WARNING warns about hazards that could cause serious personal injury, death or major property
damage and if ignored presents a potential hazard.
CAUTION warns about hazards that will or can cause minor or moderate personal injury and/or
property damage and if ignored presents a potential hazard. It can also make consumers aware of
actions that are unpredictable and unsafe.
ATTENTION indicates special instructions that are important but not related to hazards.
READ AND FOLLOW ALL INSTRUCTIONS IN THIS OWNER’S
MANUAL AND ON EQUIPMENT.
IMPORTANT SAFETY INSTRUCTIONS
Before installing or servicing this electrical equipment, turn power supply OFF.
KEEP SAFETY LABELS IN GOOD CONDITION AND REPLACE IF MISSING OR DAMAGED.
WARNING – To reduce risk of injury, do not permit children to use or climb on the heater, pumps or
filters. Closely supervise children at all times. Components such as the filtration system, pumps, and
heaters must be positioned to prevent children from using them as a means of access to the pool.
CAUTION – This heater is intended for use on permanently installed swimming pools and may also
be used with spas. Do NOT use with storable pools. A permanently installed pool is constructed in or
on the ground or in a building such that it cannot be readily disassembled for storage. A storable pool is
constructed so that it is capable of being readily disassembled for storage and reassembled to its origi-
nal integrity.
Though this product is designed for outdoor use, it is strongly recommended to protect the electrical
components from the weather. Select a well drained area, one that will not flood when it rains. It requires free
circulation of air for cooling. Do not install in a damp or non-ventilated location.
WARNING – It is required that licensed electricians do all electrical wiring. Risk of
Electric Shock. Hazardous voltage can shock, burn, cause death or serious property
damage. To reduce the risk of electric shock, do NOT use an extension cord to connect
unit to electric supply. Provide a properly located outlet. All electrical wiring MUST be
in conformance with applicable local and national codes and regulations. Before work-
ing on this unit, turn off power supply to the heater.
WARNING – To reduce the risk of electric shock replace damaged wiring immediately. Locate conduit
to prevent abuse from lawn mowers, hedge trimmers and other equipment.
WARNING – Failure to bond to pool structure will increase risk for electrocution and could result in
injury or death. To reduce the risk of electric shock, the electrician must comply with installation
instructions and must bond the heater accordingly. In addition, the licensed electrician must also con-
form to local electrical codes for bonding requirements.

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NOTES TO THE ELECTRICIAN:
Use a solid copper conductor, size 8 or larger. Run a continuous wire from external bonding lug to rein-
forcing rod or mesh. Connect a No. 8 AWG solid copper bonding wire to the grounding lug provided on the
heater and to all metal parts of swimming pool or spa, and to all electrical equipment, metal piping (except
gas piping), and conduit within 5 ft. (1.5 m) of inside walls of swimming pool or spa.
IMPORTANT -Reference NEC codes for all wiring standards including, but not limited to, grounding,
bonding and other general wiring procedures.
WARNING – Suction Entrapment Hazard.
Suction in suction outlets and/or suction outlet covers which are damaged, broken,
cracked, missing, or unsecured can cause severe injury and/or death due to the following
entrapment hazards:
Hair Entrapment- Hair can become entangled in suction outlets.
Limb Entrapment- A limb inserted into an opening of a suction outlet or suction outlet
cover that is damaged, broken, cracked, missing, or not securely attached can result in a
mechanical bind or swelling of the limb.
Body Suction Entrapment- A differential pressure applied to a large portion of the body or limbs can
result in an entrapment.
Evisceration/ Disembowelment - A vacuum applied directly to the intestines through an unprotected
suction outlet sump or suction outlet cover which is damaged, broken, cracked, missing, or unsecured
can result in evisceration (disembowelment).
Mechanical Entrapment- There is potential for jewelry, swimsuit, hair decorations, finger, toe or knuck-
le to be caught in an opening of a suction outlet or suction outlet cover resulting in mechanical entrap-
ment.
WARNING - To reduce the risk of entrapment hazards:
• When suction outlets are less than a 18” x 23” equivalent, a minimum of two
functioning suction outlets per pump must be installed. Suction outlets in the
same plane (i.e. floor or wall), must be installed a minimum of three feet (3’) [1
meter] apart, as measured from near point to near point.
• Dual suction outlets shall be placed in such locations and distances to avoid
“dual blockage” by a user.
• Dual suction fittings shall not be located on seating areas or on the backrest for
such seating areas.
• The maximum system flow rate shall not exceed the flow rating of any listed (per current revision of
ASME/ANSI A112.19.8) suction outlet cover installed.
• Never use the Pool or Spa if any suction outlet component is damaged, broken, cracked, missing, or not
securely attached.
• Replace damaged, broken, cracked, missing, or not securely attached suction outlet components imme-
diately.
• Install two or more suction outlets per pump in accordance with latest APSP (formally NSPI) Standards
and CPSC guidelines. Follow all applicable National, State, and Local codes.

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WARNING – Failure to remove pressure test plugs and/or plugs used in winterization of the pool/spa
from the suction outlets can result in an increase potential for suction entrapment as described above.
WARNING – Failure to keep suction outlet components clear of debris, such as leaves, dirt, hair, paper
and other material can result in an increase potential for suction entrapment as described above.
WARNING – Suction outlet components have a finite life, the cover/grate should be inspected fre-
quently and replaced at least every ten years or if found to be damaged, broken, cracked, missing, or
not securely attached.
WARNING – All suction and discharge valves MUST be OPEN when starting the circulation system.
Failure to do so could result in severe personal injury and/or property damage. All drains and suction
outlets MUST have properly installed covers, securely attached using the screws supplied with the
covers. If screws are lost, order replacement parts from your supplier.
WARNING – Hazardous Pressure. Pool and spa water circulation systems
operate under hazardous pressure during start up, normal operation, and after
pump shut off. Stand clear of circulation system equipment during start up. Fail-
ure to follow safety and operation instructions could result in violent separation of
the pump housing and cover due to pressure in the system, which could cause
property damage, severe personal injury, or death. Before servicing pool and spa
water circulation system, all system and pump controls must be in off position and
filter manual air relief valve must be in open position. Before starting system
pump, all system valves must be set in a position to allow system water to return
back to the pool. Do not change filter control valve position while system pump is
running. Before starting system pump, fully open filter manual air relief valve. Do
not close filter manual air relief valve until a steady stream of water (not air or air
and water) is discharged.
WARNING – Separation Hazard. Failure to follow safety and operation in-
structions could result in violent separation of pump components. Strainer cover
must be properly secured to pump housing with strainer cover lock ring. Before
servicing pool and spa circulation system, manual air relief valve must be in open
position. Do not operate pool and spa circulation system if a system component is
not assembled properly, damaged, or missing. Do not operate pool and spa circu-
lation system unless filter air relief valve body is in locked position in filter upper
body.
WARNING – Never operate or test the circulation system at more than 40 PSI.
WARNING – Fire and burn hazard. Motors operate at high temperatures and if they are not properly
isolated from any flammable structures or foreign debris they can cause fires, which may cause severe
personal injury or death. It is also necessary to allow the motor to cool for at least 20 minutes prior to
maintenance to minimize the risk of burns.
WARNING – Failure to install according to defined instructions may result in severe personal injury or
death.

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WARNING – The following “Safety Rules for Hot Tubs” recommended by the U.S. Consumer
Product Safety Commission should be observed when using the spa.
1. Spa or hot tub water temperatures should never exceed 104°F [40°C]. A temperature of 100°F [38°C]
is considered safe for a healthy adult. Special caution is suggested for young children. Prolonged im-
mersion in hot water can induce hyperthermia.
2. 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 beware! Soaking in water above 100°F [38°C] can cause fetal damage during the
first three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant
women should adhere to the 100°F [38°C] maximum rule.
4. Before entering the spa or hot tub, users should check the water temperature with an accurate ther-
mometer; spa or hot tub thermostats may err in regulating water temperatures by as much as 4°F
(2.2°C).
5. Persons taking medications, which induce drowsiness, such as tranquilizers, antihistamines or antico-
agulants, should not use spas or hot tubs.
6. If the pool/spa is used for therapy, it should be done with the advice of a physician. Always stir pool/
spa water before entering the pool/spa to mix in any hot surface layer of water that might exceed
healthful temperature limits and cause injury. Do not tamper with controls, because scalding can result
if safety controls are not in proper working order.
7. Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure prob-
lems should obtain a physicians advice before using spas or hot tubs.
8. Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above
normal body temperature of 98.6°F [37°C]. The symptoms of Hyperthermia include: drowsiness, leth-
argy, dizziness, fainting, and an increase in the internal temperature of the body.
The effects of Hyperthermia include:
1. Unawareness of impending danger.
2. Failure to perceive heat.
3. Failure to recognize the need to leave the spa.
4. Physical inability to exit the spa.
5. Fetal damage in pregnant women.
6. Unconsciousness resulting in danger of drowning.
DEFINITIONS:
Suction Outlet – The term Suction Outlet is a fitting, fitting assembly, cover/grate and related
components that provide a means for water to exit the pool and into the pump
circulating system.
Inches of Mercury (in Hg) - A unit for measuring pressure below atmospheric (“suction” or “vacuum”) (1.0
inch Hg = .491 PSI)
Main Drain – See Suction Outlet
PSI – An abbreviation for pounds per square inch.

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INTRODUCTION:
This manual contains instructions for installation, operation, maintenance, troubleshooting, and parts lists
for the safe use of the swimming pool/spa/hot tub heaters. Hayward strongly recommends that the installer
read the manual before installing the swimming pool/spa/hot tub heater. If after reviewing the manual any
questions remain unanswered, contact the factory or local representative. Following heater installation, the
installer should leave all manuals with the consumer for future reference.
LIMITED WARRANTY SUMMARY:
Hayward warrants the pool/spa/hot tub heater to be free from defects in materials and workmanship, and
will within one year from date of installation for all users, for the original purchaser, repair or, at our option,
replace without charge any defective part. Hayward further warrant that if the heat exchanger or exchanger
headers (water-containing section) leak within one year from date of such installation for all users, due to
defects in materials and workmanship, Hayward will provide a replacement part. Cost of freight, installation,
fuel, and service labor (after one year) is at user’s expense. For full details of warranty agreement, see war-
ranty certificate included in this manual.
ATTENTION: If the pool/spa/hot tub heater is damaged or destroyed by improper maintenance, exces-
sive water hardness, incorrect water chemistry, or freezing it is not covered under the manufacturer’s
warranty.
MAINTAINING PROPER WATER CHEMISTRY:
WARNING: Failure to maintain proper water chemistry may cause premature
heat exchanger damage or failure.
The heat exchanger in your Hayward pool heater is made from the highest quality of copper and nickel
(Cupronickel) materials. The premium materials and the exacting processes used in the manufacture of the
heat exchanger is state of the art in pool heater design and manufacture. Yet, it remains vital that the heat ex-
changer be protected from damaging or corrosive chemicals, insufficient water flow or improperly balanced
water chemistry. Heat exchanger damage or failure resulting from improper flow, improperly balanced pool
water or the improper addition of sanitizer into the water is NOT covered under the terms of your warranty.
The following factors are critical to heat exchanger protection. Follow these guidelines to help prevent
pre-mature damage or failure to your heater and heat exchanger.
1. WATER FLOW THROUGH HEATER
Water must be flowing through the heater at the minimum rated flow rate during operation. Check that
the pump is operating and the system is filled with water and purged of all air prior to starting the heater.
The minimum rated flow rate is listed on page 15. Some installations may require an adjustment to the water
pressure switch for proper low-flow protection. Test your system and if necessary, adjust the water pressure
switch as described on page 22.
SECTION I. GENERAL INFORMATION

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2. POOL/SPA WATER CHEMISTRY
The chemistry balance and mineral content of swimming pool water changes daily due to the addition of
pool and sanitizing chemicals, bather loads, rain, runoff and the amount of sun - to name a few. Improper chem-
istry balance and mineral content can cause scaling and deposits to form on pool walls, in the filtration system,
in the heat exchanger tubes and additionally can promote corrosive action to all metals in the water path. Chang-
ing spa water regularly and maintaining the correct chemical balance in your pool/spa will keep the pool/spa
safe and sanitary, and will help protect the heat exchanger. Use a 4-way pool/spa water test kit to check your
water frequently (at least weekly). Use the following guidelines to help protect your heater’s heat exchanger:
3. SKIMMER CHLORINATION
Placing chlorine or bromine tablets directly into the skimmer may result in high chemical concentrations
flowing through the heater. DO NOT place chlorine or bromine tablets in the skimmer.
4. CHLORINATOR INSTALLATION
Chlorinators must be installed downstream of the heater, and a check valve must be installed between the
heater and chlorinator to prevent high chemical concentrations from back flowing into the heater. Make sure your
piping arrangement meets the chlorinator installation requirements shown on page 16.
5. BYPASS
Until water chemistry is properly balanced, and if your piping has a bypass valve installed for the heater,
open the bypass so that corrosive and potentially damaging water will not flow through the heater and there-
fore the heat exchanger. Close the bypass valve once the water is properly balanced. Failure to close the
bypass valve when attempting to operate the heater will result in extensive damage to the heat exchanger.
Ensure water flow through the heater is restored before operating the heater. A bypass feature is also advanta-
geous for service needs and for the ability to remove the heater from the water path when not heating. Refer
to page 15 for further information.
Recommended
Level
Effect of Low Levels Effect of High Levels
Chlorine 1 - 3 ppm
Bromine 2 - 4 ppm
pH 7.4 - 7.6
corrosive to heat exchanger,
swimmer irritation
cloudy water, scaling of heat exchanger,
reduced sanitizer effectiveness
Total Alkalinity 80 - 120 ppm
corrosive to heat exchanger,
large fluctuations in pH
scaling of heat exchanger
Calcium Hardness 200 - 400 ppm corrosive to heat exchanger scaling of heat exchanger
Salt 2700 - 5000 ppm poor salt chlorinator performance corrosive to heat exchanger
hazy water, algea growth,
bacteria causing infections
swimmer irritation, bleaching of clothes/hair,
corrosive to heat exchanger

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EQUIPMENT INSPECTION:
On receipt of the heater, inspect the heater carton(s) for damage. If any carton(s) is damaged, note it when
signing for it. Remove the heater from the carton(s) inspect it and advise the carrier of any damages at once.
IMPORTANT NOTICE:
The installation instructions are intended for the use of a qualified technician, specifically trained and
experienced in the installation of this type of heating equipment. Some states or provinces require that instal-
lation be licensed. If this is the case in the state or province where heater is located, the contractor must be
properly licensed.
WARNING: Failure to comply with the appliance and vent package installation instructions and service
instructions in this manual may result in equipment damage, fire, asphyxiation, or carbon monoxide
poisoning. Exposure to products of incomplete combustion (carbon monoxide) can cause cancer and
birth defects or other reproductive harm.
CONFORMANCE WITH CODES:
The heater shall be installed in accordance with all local and state codes. The heater installation must con-
form to the latest edition of the National Fuel Gas Code (ANSI Z223.1/NFPA 54) and with the requirements of
the authority having jurisdiction. Design certification of the heater is in compliance with ANSI Z21.56/CSA 4.7.
For Canadian installations, the heater is to be installed in accordance with the standards CAN/CGA B149.1
and B149.2 – Installation Codes for Gas Burning Appliances and Equipment and/or local codes and, if appli-
cable, CSA C22.1 – Canadian Electrical Code, Part I.
SECTION II. INSTALLATION
LOCATING THE HEATER:
Locate the pool/spa/hot tub heater in an area where leakage of the heat exchanger or connections will not
result in damage to the area adjacent to the heater or to the structure. When such locations cannot be avoided,
it is recommended that a suitable drain pan, with drain outlet, be installed under the heater. The pan must not
restrict airflow.
This heater must be installed at least (5) feet from the inside wall of a pool (in-ground or above-ground)/
spa/hot tub unless separated from the pool/spa/hot tub by a solid barrier.
The heater must be installed such that the location of the exhaust gas vent outlet relative to adjacent
public walkways, adjacent buildings, openable windows, and building openings complies with the National
Fuel Gas Code (ANSI Z223.1/NFPA 54) and/or CAN/CGA B149 installation codes. Outdoor installation and
service clearances:
The heater must be installed outdoors such that the installation and service clearances from combustible
materials shown in Table 2 are maintained. This heater may be installed on combustible floors.
1. The heater is self-venting when installed outdoors and does not require additional vent piping.
2. Do not install in a location where growing shrubs may in time obstruct a heater’s combustion air and
venting areas.
3. Do not install this appliance under an overhang less than (3) feet from the top of the appliance. The
area under the overhang must be open on (3) sides.
4. Do not install the heater where water spray from ground sprinkler can contact the heater. The water
could splash on the controls causing electrical damage.
5. Do not install under a deck.
6. Do not install within 24” of any outdoor HVAC equipment.
7. Do not install where water may run-off a roof into the heater. A gutter may be needed to protect the
heater.

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8. If the heater is to be installed in front of
an exterior wall with vinyl siding, in-
crease the clearance from the back of the
unit shown in Table 2 to 12 inches.
9. For minimum exhaust vent clearances
for all building openings, including but
not limited to vented eaves, doors, win-
dows, or gravity inlets, see Figure 01. In
Canada, the heater must be installed with
the top of the vent at least 10 feet (3m)
below, or to either side of, any opening
into a building.
Table 2
Outdoor Installation Clearances
Heater Panel Required Clearance
Top Unobstructed
Front 18 inches
Back 6 inches
Water Connection Side 12 inches
Side Opposite Water Connec-
tion 6 inches
4ft
Minimum
4ft
Minimum
3ft
Minimum
10 ft
Minimum
4ft
Minimum
Figure 01: Minimum Clearances
Forced Air Inlet
FLOORING:
This heater may be installed on either non-combustible or combustible flooring. Ultralite™ or equiva-
lent concrete-over-foam HVAC pads are acceptable.

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Figure 02: Sub-Assemblies
Top Jacket
Flue Transition
Top Cap
Flue Collector
Side Panels
Heat Exchanger
Assembly
Pressure Switch
Port
Temperature
Limit Switches
Left Side
Jacket
Right Side
Jacket
Front Access
Panel
Heat Exchanger
Cover
Rear
Jacket

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HOW TO OPEN FRONT ACCESS PANEL
ATTENTION: Care must be taken to not damage ribbon cable connecting display board to ignition
board when removing Front Access Panel.
1. Remove (1) screw above control, securing top jacket to front access panel.
2. Lift Access Panel up by the handle at the bottom.
3. Swing bottom of panel out.
4. Slide top of panel down, and then out. Be sure not to place too much tension on the ribbon
cable as the front panel is removed from the unit
5. Disconnect ribbon cable from ignition board.
GAS SUPPLY AND PIPING:
To properly size the gas piping for the heater, refer to Tables 3 or 4, depending on natural or propane gas,
and single-stage or 2-stage regulation. Follow local gas codes for proper gas line material selection (copper,
iron, plastic, etc.). It is VERY IMPORTANT when installing a propane heater on a 2-stage regulation system
to follow the gas line sizing data in Table 4 without exception.
*Based upon an inlet pressure of 0.5 psig or less at a pressure drop of 0.5 in-wc.
**Based upon an inlet pressure of 11 in-wc at a pressure drop of 0.5 in-wc.
Table 3
Gas Pipe Sizing
Low-Pressure, Single-Stage Regulaion
Distance from
Gas Meter or Tank
Regulator Outlet to
Heater Gas Valve
Inlet
Gas Type Natural Gas* Propane**
btu/hr input 135,000 135,000 135,000
Line Material Iron or Plastic
Pipe Iron Pipe Plastic Pipe
0 to 50 ft 3/4” 3/4” 3/4”
50 to 100 ft 1” 3/4” 1-1/8”
100 to 200 ft 1-1/4” 1” 1-1/8”
200 to 300 ft 1-1/4” 1” 1-1/8”
Table 4
Gas Pipe Sizing
High-Pressure, 2-Stage Regulaion
Distance from Gas Meter or Tank
Regulator Outlet to Heater Gas Valve
Inlet
Gas Type Natural Gas Propane
btu/hr input 135,000 135,000 135,000
Line Material Iron or Plastic
Pipe Iron Pipe Plastic Pipe
First Stage
0 to 50 ft 1/2” * 1/2” *** 1/2” ***
50 to 100 ft 1/2” * 1/2” *** 1/2” ***
100 to 150 ft 1/2” * 1/2” *** 1/2” ***
Second Stage 0 to 10 ft 1/2” ** 1/2” **** 5/8” ****
*Based upon an inlet gas pressure of 2 psig at a pressure drop of 1 psi.
**Based upon an inlet gas pressure of 10 in-wc at a pressure drop of 0.5 in-wc.
***Based upon an inlet gas pressure of 10 psig at a pressure drop of 1 psi.
****Based upon an inlet gas pressure of 11 in-wc at a pressure drop of 0.5 in-wc.

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GAS SUPPLY INSTALLATION:
The gas connection is located on the left-hand side of the heater cabinet. Insert the pipe to the gas valve
through the grommet in the cabinet side (see Figure 043.) A union should be installed outside the heater cabi-
net for easy removal of the gas manifold assembly during service.
A CSA certified main gas shutoff valve must be installed outside the cabinet and within 6 feet of the
heater. This valve must have an I.D. large enough to supply the proper amount of gas volume to the heater.
See Figure 034.
ATTENTION: Apply joint compound (pipe dope)
sparingly and only to the male threads of pipe joints.
Do not apply joint compound to the first two threads.
Use joint compounds resistant to the action of lique-
fied petroleum gas. Do not overtighten the gas inlet
pipe or damage may result.
ATTENTION : Do not use flexible appliance con-
nectors on any gas connections unless the connector
is CSA approved for outdoor installation, is marked
with BTUH capacity (which must be equal to or
greater than the heater rated input) and the type of gas
(natural or LP).
Reduction of gas supply pipe or tubing to the inlet of the heater gas valve must be made at the valve only
and must match the valve inlet size (3/4” NPT).
If more than one appliance is installed on the gas line, consult the local gas company for the proper gas
line size.
Questions on the installation of the proper gas line size can be directed to Hayward Technical Service.
NATURAL GAS:
The gas meter must have the capacity to supply enough gas to the
pool heater and any other gas appliances if they are on the same pipe-
line (Example: 225 meter = 225,000 BTUH). If doubt exists as to the
meter size, consult the local gas utility for assistance. Natural gas must
be “pipeline quality” supplied from a natural gas utility company.
Hayward will not be responsible for heaters that soot up due to im-
proper meter and gas line sizing resulting in improper gas volume, or
heaters that are damaged in any way if connected to a natural gas well.
PROPANE GAS:
All propane gas tanks must be located outdoors and away from pool/spa structure and in accordance with
the standard for storage and handling of propane gas, ANSI/NFPA 58 (latest edition) and applicable local
codes. If the propane gas tank is installed underground, the discharge of the regulator vent must be above the
highest probable water level.
Propane tanks must have sufficient capacity to provide adequate vaporization for the full capacity of the
equipment at the lowest expected temperatures. Consult a propane company expert for correct sizing.
Figure 03: Gas Connection Location
Gas Connection
Figure 04: Gas Piping

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ATTENTION: Whenever a high-pressure double regulation system is utilized for propane gas, consult
a propane expert for accurate pipe and pressure sizing. Make sure that 1st and 2nd stage regulators are
large enough to handle the BTUH input listed for the heater(s) being used.
Hayward will not be responsible for heaters that soot up due to improper gas line or propane tank siz-
ing resulting in improper gas volume.
WATER PIPING:
The heater is designed for use with pool and spa/hot tub water only, as furnished by municipal water dis-
tribution systems. The warranty does not cover heater use with mineral water, seawater (PPM>5000), or other
non-potable waters.
Do not install any restriction in the water pipe between the heater outlet and the pool/spa with the
exception of:
1. three-way switching valve
2. in-line chlorinator
3. chlorinator check valve
WA R N I NG: EXPLOSION
HAZARD Blockage of water
flow from heater return to pool
may result in fire or explosion
causing property damage, personal
injury, or loss of life.
The heater is shipped with CPVC flanged pipe
nipples that are pre-assembled with the required reducer
to be used with the supplied 1.5” flexible hose fittings.
Assemble all water connection components as shown in Figure 05. Assemble these parts to the heater prior to
plumbing. Tighten all nuts securely, ensuring a seal with the rubber gaskets, before connecting flexible hose.
The CPVC flanged pipe nipples and reducers must be installed on the heater inlet and outlet without modi-
fication. Pipe, fittings, valves, and any other element
of the filter system may be made of plastic materials, if
acceptable to the authority having jurisdiction.
Installation of this pool/spa/hot tub heater with
rigid PVC pipe plumbed directly to the inlet and outlet
connections of the heater requires purchase of Hayward
accessory Union Kit SPX3200UNKIT. The kit contains
the appropriate gaskets, pipe nipples and union nuts to
allow 2” or 2 ½” PVC pipe to be plumbed to the unit.
Use PVC primer and glue to connect water piping to the
connectors supplied in the kit.
Heat sinks, heat tapes, firemen switches, and check
valves are not required on the heater. However, if there
is any chance of “back-siphoning” of hot water when
the pump stops running, it is suggested that a check
valve be used on the heater inlet pipe.
The built-in bypass inside the header will maintain
proper flow through the heat exchanger if the flow rate
Gaskets
Pipe Nipples
Union Nuts
Heater
Header
1.5” Hose Fittings
Figure 05: Water Connection Assembly
Heater Inlet
Heater Outlet
Flow Meter
Return to
Pool / Spa
Bypass Valve
Figure 06: Manual Bypass valve

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Table 5: Allowable Water Flow Rate Range
Model Minimum Flow
Rate (GPM)
Maximum Flow
Rate (GPM)
H13510
ABG135 20 125
Figure 07: Typical plumbing to pool
Figure 0707 illustrates a typical pool piping diagram and layout for the pool equipment.
Figure 0808 illustrates a multiple heater installation for very large pools with and without a manual
bypass valve.
Figure 08: Multiple heater system
INSTALLATION ABOVE/BELOW WATER SURFACE:
If the heater is installed less than three (3) feet above the surface of
the pool/spa water, install eyeball fittings or directional flow fittings on
the end of the return water line to the pool/spa to create adequate back
pressure at the heater to operate the pressure safety switch when the
filter pump is running.
If the heater is installed more than three (3) feet above the surface
of the pool/spa water, install a loop as shown in Figure 0909 to prevent
drainage of water in the heater during a filter change.
For installation below the pool/spa surface, refer to Section III.
Figure 09: Heater installation
above pool/spa
is within the range for the heater. See Table 5. The
minimum flow rate is to be calculated or measured with
the in-floor cleaning system in use, if the pool is so
equipped, as well as any other jets or other demands on
the water flow.
If the normal pump and filter system flow rate
exceeds 125 gpm then a manual bypass valve must be
installed as shown in Figure 06. Damage caused by flow
rates outside this range will void the manufacturer’s warranty.
The installation is as follows:
1. Install a flow meter on the outlet line of the heater.
2. Adjust the manual bypass valve until the flow rate is within the flow rate range specified for the heater.
3. Once the valve is set, note the position and remove the valve handle to prevent further adjustment.
ATTENTION: Improperly adjusted manual bypass valves will result in damage to the heater if the flow
rates are not maintained as specified in Table 5 under all operating conditions. The heat exchanger will
fail and this damage will not be covered under the Hayward warranty.

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Figure 10: Automatic chlorinator
AUTOMATIC CHLORINATORS AND
CHEMICAL FEEDERS:
If used, a chlorinator must be installed downstream from the heater
in the pool return line and at a lower elevation than the heater as shown
in Figure 1010. Install a separate positive seal corrosion resistant check
valve between the heater outlet and the chlorinator to prevent highly
concentrated sanitizer from back siphoning into the heater. Back siphon-
ing usually occurs when the pump is shut off and a pressure differential is
created.
PRESSURE RELIEF VALVE:
Some local building codes require a pressure relief valve for all pool/
spa heaters. The inlet/outlet header has a 3/4” port which can be used for
this purpose (see Figure 1811 for location of port). A 3/4” pressure relief
valve having a discharge capacity greater than or equal to the Btu/hr input of
the heater, and a pressure rating equal to or less than the working pressure is
recommended. See the rating plate located inside the front access panel on the
heater for the input rating and working pressure. If desired, you may order the
pressure relief valve from Hayward; order p/n CHXRLV1930. Remove the
factory-installed pipe plug, and install the pressure relief valve using a suitable
amount of pipe thread sealant or Teflon tape on the threads. Install the pres-
sure relief valve with the discharge connection facing the ground. If necessary,
connect a pipe (of the same size as the valve outlet) to the outlet and run it to
a safe place of discharge. Do not install any shut-off or restriction in this drain
line.
ELECTRICAL SPECIFICATIONS:
WARNING: It is required that licensed electricians do all electrical wiring.
Risk of Electric Shock. Hazardous voltage can shock, burn, and cause death or
serious property damage. To reduce the risk of electric shock, do NOT use an exten-
sion cord to connect unit to electric supply. Provide a properly located electrical
receptacle. All electrical wiring MUST be in conformance with applicable local and
national codes and regulations. Before working on heater, turn off power supply.
GENERAL INFORMATION:
Wiring connections must be made as shown in the wiring diagram found inside the heater cabinet, and as
shown in Figure 133. The heater must include a definite means of grounding and bonding. There is a ground
lug on the control panel and a bonding lug on the side of the heater.
MAIN POWER:
WARNING - Power connections supplied to the heater must be in accordance with National Electric
Code (NEC) and local electric codes. The NEC contains no standards requiring Ground-Fault Inter-
ruption protection (via GFI Circuit Breaker or otherwise) of “Fixed” or “Stationary” equipment, under
article 680: Swimming Pools, Fountains, & Similar Installations.
Pressure
Relief Valve
Drain Valve
Figure 11: Drain valve and
relief valve locations

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BONDING:
CAUTION - This heater must be connected to a bonding grid with a solid copper conductor wire
gauge 8 AWG or larger. All Hayward heaters are designed for copper conductors only. The National
Electrical Code (NEC), and most other codes require that all metallic components of a pool structure,
including reinforcing steel, metal fittings and above ground equipment, be bonded together with a solid
copper conductor wire gauge 8 AWG or larger. The heater, along with pumps and other pool equipment
must be connected to this bonding grid. A bonding lug is provided on the side of the heater to ensure
that this requirement is met.
ELECTRICAL CONNECTIONS:
The heater is equipped with a hot surface ignition control system that automatically lights the burners.
An external power supply is required to power the control system. The electrical specifications for this heater
are 120 vac, 60Hz, 1-phase, 5.5A maximum current. It is recommended that circuit protection for the heater
circuit be rated at 15 Amperes.
REMOTE CONTROL CONNECTION:
The heater is capable of connection to an external 2-wire remote thermostat or to a 3-wire remote switch.
A 2-wire thermostat has its own temperature sensor for regulating water temperature. A 3- wire remote switch
allows the POOL or SPA modes to be remotely selected.
The remote wiring harness can be found in the vinyl pouch assembly below the gas valve. Plug the har-
ness into the ignition board as shown in Figure 12. Replace the plastic plug on the right side of the heater
with the supplied star bushing and run remote wiring through the bushing to the external thermostat or
switch. Use 3/16” male quick connects to attach field supplied wiring to remote harness.
2-WIRE REMOTE CONTROL CONNECTION:
To configure the heater for 2- wire remote thermostat
control, use the MODE key on the heater keypad to put the
control into STANDBY mode. Then press and hold both
the DOWN and MODE keys for 3 seconds until the display
shows the code “bo”.
On the remote control wiring harness (Figure 1212),
connect the appropriate wires from the remote control to the
ORANGE wire (POOL) and WHITE wire (24V).
To operate the heater by remote thermostat, the heater’s
control must be in either POOL or SPA mode. The display will
show “bo”. The POOL or SPA LED will be illuminated. The
remote thermostat will operate the heater. The heater’s ther-
mostat will function to limit the water temperature to a maxi-
mum of 104°F.
3-WIRE REMOTE CONTROL CONNECTION:
In the remote control wiring harness (Figure 1212), connect the appropriate wires from the remote con-
trol to the ORANGE wire (POOL), WHITE wire (24V), and RED wire (SPA). To operate the heater with a
remote 3-wire switch, the heater’s control must be in STANDBY mode. The STANDBY LED will be il-
luminated. When the remote switch is set to “Pool/Low” the POOL LED will be illuminated and the water
temperature will be displayed. When the remote switch is set to “Spa/High” the SPA LED will be illuminated
and the water temperature will be displayed. The heater will use its internal thermostat to regulate the water
temperature to the set point of the mode selected.
Plug remote harness here on ignition board
Figure 12: Remote Harness Connection

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1301300301 Rev A
Wiring Connection Diagram / Schéma de Connexion de Câblage
Forced Draft Gas Heaters / Chaudière Gas à Air pulsé
Flue Gas Temperature
Limit Switch
Commutateur limiteur de
température des gaz de
combustion
120VAC 3-Prong Plug
Figure 13: Wiring connection diagram.

Figure 14:
Lighting &
Operating
Instructions
label
1919

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Figure 15: Location of Components
GENERAL:
Some of the following procedures will require the heater to be operating. Full lighting and shutdown instruc-
tions are included on the lighting and operating label affixed to the inside of the front access panel. The heater
automatically lights in response to a call for heat, and automatically shuts down when that call for heat is satisfied.
Water must be flowing through the heater during operation. Check that the pump is operating and the
system is filled with water and purged of all air prior to starting the heater.
SECTION III. INSTALLER CHECK-OUT AND START-UP
Transformer Ignition Control
Board
Blower Vacuum
Switch
Blower
Air Box
Flame Sensor
Gas Manifold
Igniter Access
Panel
Gas
Valve
Sight
Glass