Pentair Pool Products MasterTemp 200HD Specification sheet

Rev. D 27-06-11 P/N 474131
1
1
MasterTemp™ (Australia)
POOL AND SPA HEATER
OPERATION AND INSTALLATION MANUAL
WARNING
Pentair Water AU/NZ – Head Office – 2 Redwood Drive, Notting Hill, VIC 3168 – AUS • [phone] • 1800 664 266
Pentair Water Pool and Spa, Inc.
1620 Hawkins Ave., Sanford, NC 27330, USA • [phone] • [phone]
10951 W. Los Angeles Ave., Moorpark, CA 93021, USA • [phone] • [phone]
1
Owner:
Retain For
Future
Reference
FOR YOUR SAFETY - READ BEFORE OPERATING
•If you do not follow these instructions exactly, a fire or explosion may result, causing property
damage, personal injury or loss of life.
•Improper installation, adjustment, alteration, service or maintenance can cause property
damage, personal injury or death. Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
•Do not place articles or against this appliance.
•Do not use or store flammable materials near this appliance.
•Do not spray aerosols in the vicinity of this appliance while it is in operation.
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.
For additional free copies of this manual; call 1800 664 266 – AUS.
240 VAC NATURAL GAS/LP GAS
MODELS Natural Propane
200HD (200 MJ/h) 460946 460949
300HD (300 MJ/h) 460945 460948
400HD (400 MJ/h) 460944 460947
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 which can cause serious injury, property damage,
or death. As an additional measure of safety, Pentair Water Pool and
Spa,Inc.stronglyrecommendsinstallationofsuitableCarbonMonoxide
detectors in the vicinity of this heater. Improper installation and/or
operation will void the warranty.

P/N 474131 Rev. D 27-06-11
2
Customer Service
If you have questions about ordering Pentair Water Pool and Spa® (“Pentair”) replacement
parts, and pool products, please use the following contact information.
Customer Service and Technical Support, AUS (AEST Time)
Phone: [phone]
Fax: [phone]
Notting Hill,Victoria, AUS (AEST Time)
Phone: [phone]
Customer Service and Technical Support, USA (8 A.M. to 4:30 P.M. Eastern/Pacific Times)
Phone: [phone]
Fax: [phone]
Sanford, North Carolina, USA (8 A.M. to 4:30 P.M. — Eastern Time)
Phone: [phone]
Fax: [phone]
Moorpark, California, USA (8 A.M. to 4:30 P.M. — Pacific Time)
Phone: [phone]
Fax: [phone]
Web sites
visit www.pentairpool.com or www.staritepool.com or www.onga.com.au
© 2011 Pentair Water Pool and Spa, Inc. All rights reserved.
Pentair Water AU/NZ – Head Office – 2 Redwood Drive, Notting Hill, VIC 3168 – AUS • [phone]
1620 Hawkins Ave., Sanford, NC 27330 – USA • [phone] or [phone]
10951 West Los Angeles Ave., Moorpark, CA 93021 – USA • [phone] or [phone]
This document is subject to change without notice.
Trademarks and Disclaimers: MasterTemp™, IntelliTouch™, EasyTouch™, and Pentair Water Pool and Spa®are trademarks and/or
registered trademarks of Pentair Water Pool and Spa, Inc. and/or its affiliated companies in the United States and/or other countries.
Unless noted, names and brands of others that may be used in this document are not used to indicate an affiliation or endorsement
between the proprietors of these names and brands and Pentair Water Pool and Spa, Inc. Those names and brands may be the
trademarks or registered trademarks of those parties or others.

Rev. D 27-06-11 P/N 474131
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Contents
Section 1. Heater Identification Information (HIN) ............................................................. 4
Heater Data Rating Plate ..................................................................................... 4
Section 2. Introduction .......................................................................................................... 5
Important Notices ................................................................................................................................................................................. 5
Warranty Information ............................................................................................................................................................................ 5
Code Requirements .............................................................................................................................................................................. 6
Consumer Information and Safety Information ...................................................................................................................................... 6 - 8
General Specifications ......................................................................................................................................................................... 8
Section 3. Installation ............................................................................................................. 9
Heater Description ................................................................................................................................................................................ 9
Sequence of Operation ......................................................................................................................................................................... 9
Putting the Heater into Service ............................................................................................................................................................ 9
Specifications ...................................................................................................................................................................................... 10
Plumbing Connections .......................................................................................................................................................................... 11
Valves .................................................................................................................................................................................................. 11
Manual By-Pass .................................................................................................................................................................................. 11
Water Connections ............................................................................................................................................................................... 12
Below Pool Installation ......................................................................................................................................................................... 12
Gas Connections ................................................................................................................................................................................. 13
Gas Pipe Sizing ................................................................................................................................................................................... 13
Sediment Trap/Drip Leg ....................................................................................................................................................................... 13
Testing Gas Leaks and Gas Pressure .................................................................................................................................................. 14
Gas Pressure Requirements ................................................................................................................................................................ 14
Outdoor Installation / Heater Clearances .............................................................................................................................................. 15 - 16
Indoor Venting—General Requirements Heater Clearances / Outside Vent Removal ) .......................................................................... 17
Combustion Air Supply / Corrosive Vapors and Possible Causes ..................................................................................................... 18
Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting ........................................................................................ 18-21
Horizontal or Vertical Venting - Using Single-Wall Stainless Gas Vent ............................................................................................. 21
Connecting Single-Wall Stainless Steel Vent to the Heater .............................................................................................................. 22
Horizontal or Vertical Venting Flexible Duct (Flex-Vent) .................................................................................................................... 24
Corrosive Vapors and Possible Causes ................................................................................................................................................ 25
Control Panel Indexing ......................................................................................................................................................................... 25
Final Installation Check ........................................................................................................................................................................ 25
Electrical Connections .......................................................................................................................................................................... 26
Fireman’s Switch Connection/Remote Control Connections .................................................................................................................. 27
MasterTemp Wiring Diagram / Electrical Schematic Ladder Diagram .................................................................................................... 28 - 29
Section 4. Operation .............................................................................................................................................. 30
Basic System Operation / HSI (Hot-Surface Ignition) Lighting/Operation .............................................................................................. 30
Operating Instructions .......................................................................................................................................................................... 31
To Turn Off Gas to Appliance ............................................................................................................................................................... 31
Safety Controls (Air Flow Switch / Water Pressure Switch / Hight Limits / Operation of Ignitiion Module) ............................................ 32 - 33
Operating the Control Panel / Temperature Setting / Maximum Temperature Set Point ......................................................................... 33
Section 5. Troubleshooting ................................................................................................... 35
Initial Troubleshooting and Troubleshooting Chart ................................................................................................................................. 35
Heater Will Not Fire Troubleshooting (A, B, C, D) ................................................................................................................................ 36 - 39
LED Diagnostics (AGS, AFS, HLS, PS Thermistor) ............................................................................................................................ 40 - 41
Burner / Heat Exchanger Troubleshooting ............................................................................................................................................ 42
Section 6. Maintenance ..........................................................................................................43
Care and Maintenance .......................................................................................................................................................................... 43
Pressure Relief Valve ........................................................................................................................................................................... 43
After Start-Up ...................................................................................................................................................................................... 44
Spring, Fall (Autumn) and Winter Operation ........................................................................................................................................ 44
Maintaining Pool Temperature / Energy Saving Tips ............................................................................................................................. 45
Chemical Balance ................................................................................................................................................................................ 45 - 46
Replacement Parts .............................................................................................................................................................................. 47 - 51

P/N 474131 Rev. D 27-06-11
4
To identify the heater, see the data rating plate on the inner front panel of the heater. There are two designators for
each heater, one is the Model Number and the other is the Heater Identification Number (HIN).
Heater Identification Number (HIN)
The following example simplifies the identification system:
1) MT : MasterTemp
2) Model Size : (200, 300 or 400) : Input rating (Mega Joule [MJ]/hr)
3) Construction : (HD = Heavy Duty Model)
4) Fuel Type : (LP = Propane gas or N= Natural gas)
Section 1. Heater Identification Information
MT 300 HD
MT = MASTERTEMP
MODEL SIZE = MJ INPUT = MegaJoule [MJ] / HR
H. I. N.
HEATER IDENTIFICATION NUMBER
ID DESIGNATOR FOR PENTAIR WATER POOL AND SPA MASTERTEMP HEATERS
Example:
123 4
FUEL TYPE =
N = NATURAL GAS
LP = PROPANE GAS
200 (200 [MJ] /HR), 300 (300 [MJ]/HR) or 400 (400 [MJ] /HR)
HD = HEAVY DUTY MODEL
N
Heater Identification Information (HIN)
Heater Data Rating Plate Location
The heater data rating plate is located on the inner front panel of the heater. To access the data rating plate, unbolt and
remove the side door access panel as shown below.
Heater Data Rating Plate
Door
Access
Panel
Top Panel
Remove this Door
Access Panel to access
the DATA RATING PLATE
LABEL P/N
INPUT RATE [MAX.] MJ/Hr
MODEL NO.
50 HZ
*SEE INSTALLATION MANUAL
240 VAC
DESIGNED AND MANUFACTURED BY
VOLTS
ORIFICE SIZE
ELECTRICAL RATING:
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
HERTZ
mm
Sanford, NC, USA 27330
THIS APPLIANCE MUST BE INSTALLED IN ACCORDANCE WITH THE AUSTRALIAN STANDARD AS5601-2004 INSTALLATION CODES, AND
WITH THE REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION.
AUS PH # [phone]
THIS HEATER EQUIPPED TO BURN GAS
THIS APPLIANCE HAS AN IPX3 RATING AND MUST BE INSTALLED
IN ACCORDANCE WITH THE AUSTRALIAN STANDARD AS/NZS 3000.
REFER TO THE OPERATING INSTRUCTIONS FOR APPROVED WATER TREATMENTS.
12 A
DO NOT INSTALL THIS HEATER UNDER AN OVERHANG
LESS THAN 1 METER FROM THE TOP. THE AREA UNDER
THE OVERHANG MUST BE OPEN ON THREE SIDES.
MasterTemp™
AMPS
FOR YOUR SAFETY
APPROVED FOR OUTDOOR INSTALLATION ONLY.
ELECTRICAL COMPLIANCE: IN ACCORDANCE WITH
AS/NZS 3000.
SERIAL NO.
POOL HEATER
1620 Hawkins Ave.
MAX INLET GAS PRESS 6.0 kPa
MIN INLET GAS PRESS 1.0 kPa
TEST POINT PRESSURE 11±5 Pa
MAX WORKING PRESSURE 345 kPa
OUTPUT kW
ALTITUDE
ELECTRICAL CERTIFICATE OF SUITABILITY NO.
MINIMUM THERMAL EFFICIENCY 76 PERCENT
MINIMUM CLEARANCE FROM COMBUSTIBLE
CONSTRUCTION, 15 cm SIDE, 15 cm REAR, 110 cm TOP
2000 m
GMK10016
AS4560
MT 400HDN
AUM4HDN 06/11/11 001
NATURAL
400
85.8
10.95 (NB)

Rev. D 27-06-11 P/N 474131
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MasterTemp™ (Australia)
Pool and Spa Heater
Congratulations on your purchase of a MasterTemp high performance heating system. Proper installation and service of
your new heating system and correct chemical maintenance of the water will ensure years of enjoyment. The MasterTemp
is a compact, lightweight, efficient, induced-draft, gas fired high performance pool and spa heater that can be directly
connected to schedule 40 PVC pipe. The MasterTemp also comes equipped with the Pentair Water Pool and Spa®
multifunction temperature controller which shows, at a glance, the proper functioning of the heater. All MasterTemp
heaters are designed with a direct ignition device, HSI (hot-surface ignition), which eliminates the need for a standing
pilot. The MasterTemp requires an external power source (240 VAC 50 Hz) to operate.
SPECIAL INSTRUCTIONS TO OWNER: Retain this manual for future reference. This instruction manual provides
operating instructions, installation and service information for the MasterTemp high performance heater. The information in
this manual applies to all MasterTemp models. READ AND REVIEW THIS MANUAL COMPLETELY, it is very
important that the owner/installer read and understand the section covering installation instructions, and recognize the local
and state codes before installing the MasterTemp. Its use will reduce service calls and chance of injury and will lengthen
product life. History and experience has shown that most heater damage is caused by improper installation practices.
IMPORTANT NOTICES
THIS PRODUCT MUST BE INSTALLED AND SERVICED BY A PROFESSIONAL SERVICE TECHNICIAN, QUALIFIED
IN POOL HEATER INSTALLATION.
For the installer and operator of the MasterTemp pool and spa heater: The manufacturer’s warranty may be
void if, for any reason, the heater is improperly installed and/or operated. Be sure to follow the instructions set forth in
this manual. If you need more information or if you have any questions regarding to this pool heater, please contact
Pentair Water AU/NZ, AUS – at 1800 664 266 • [phone] or Pentair Water Pool and Spa, Inc.,
USA – at [phone] • [phone] • [phone].
WARRANTY INFORMATION
The MasterTemp pool heater is sold with a limited factory warranty. Specific details are described on the warranty
registration card which is included with the product.Return the warranty registration card after filling in the serial
number from the rating plate inside the heater.
Pentair Water Pool and Spa’s high standards of excellence include a policy of continuous product improvement
resulting in your state-of-the-art heater. We reserve the right to make improvements which change the specifications
of the heater without incurring an obligation to update the current heater equipment.
These heaters are designed for the heating of chlorine, bromine or salt system swimming pools and spas or
in non-stationary installations, and should never be employed for use as space heating boilers or general
purpose water heaters. The manufacturer’s warranty may be void if, for any reason, the heater is improperly
installed and/or operated. Be sure to follow the instructions set forth in this manual.
CAUTION
OPERATING THIS HEATER CONTINUOUSLY AT WATER TEMPERATURE BELOW 20°C. WILL CAUSE HARMFUL
CONDENSATION AND WILL DAMAGE THE HEATER AND VOID THE WARRANTY. Do not use the heater to protect
pools or spas from freezing if the final maintenance temperature desired is below 20°C., as this will cause condensation
related problems.
Introduction
Section 2. Introduction

P/N 474131 Rev. D 27-06-11
6
CONSUMER INFORMATION AND SAFETY
WARNING
The U.S. Consumer Product Safety Commission warns that carbon monoxide is an "invisible killer". Carbon monoxide
is a colorless and odorless gas.
1. Carbon monoxide is produced by burning fuel, including natural gas and propane.
2. Proper installation, operation and maintenance of fuel-burning appliances in the home is the most important factor in reducing
carbon monoxide poisoning.
3. Be sure that fuel burning appliances such as heaters are installed by professionals according to manufacturer's instructions and codes.
4. Always follow the manufacturer's directions for safe operation.
5. Have the heating system (including vents) inspected and serviced annually by a trained service technician.
6. Examine vents regularly for improper connections, visible cracks, rust or stains.
7. Install battery-operated carbon monoxide alarms. The alarms should be certified to the requirements of the most recent UL, IAS,
CSA and IAPMO standard for carbon monoxide alarms. Test carbon monoxide alarms regularly and replace dead batteries.
WARNING
The U.S. Consumer Product Safety Commission warns that elevated water temperature can be hazardous.
See below for water temperature guidelines before setting temperature.
1. Spa or hot tub water temperatures should never exceed 40° C. A temperature of 37° C. is considered safe for a healthy adult.
Special caution is suggested for young children. Prolonged immersion 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 37° 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 stick to the 37° C. maximum rule.
4. Before entering the spa or hot tub, the user should check the water temperature with an accurate thermometer. Spa or hot tub
thermostats may err in regulating water temperatures by as much as -15° C.
5. Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure problems should obtain their
physician's advice before using spas or hot tubs.
6. Persons taking medication which induce drowsiness, such as tranquilizers, antihistamines or anticoagulants should not use spas
or hot tubs.
CODE REQUIREMENTS
Installation must be in accordance with the following:
Section 2. Introduction
DANGER
CARBON MONOXIDE GAS IS DEADLY – Exhaust from this pool heater contains toxic levels of carbon monoxide, a dangerous,
poisonous gas you cannot see or smell.
WARNING
Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the heater. Do not
use this heater if any part has been under water. Immediately call a qualified service technician to inspect the heater
and to replace any part of control system and gas control which has been under water.
•Manufacturer’s Installation Instructions
• AS/NZS 5601.1 for Gas Installations
• Local Gas Fitting Regulations,
• Municipal Building Codes,
•S.A.A. Wiring Code,
• Local Electrical Regulations
• Any other statutory regulations

Rev. D 27-06-11 P/N 474131
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SAFETY INFORMATION
Section 2. Introduction
The MasterTemp pool heaters are designed and manufactured to provide many years of safe and reliable service when
installed, operated and maintained according to the information in this manual. Throughout the manual, safety warnings and
cautions are identified by the “ “ symbol. Be sure to read and comply with all of the warnings and cautions.
DANGER — CARBON MONOXIDE GAS IS DEADLY
• • READ OWNERS MANUAL COMPLETELY BEFORE OPERATING. • •
THIS PRODUCT MUST BE INSTALLED AND SERVICED BY A PROFESSIONAL SERVICE
TECHNICIAN, QUALIFIED IN POOL HEATER INSTALLATION. Some jurisdictions require that
installers be licensed. Check with your local building authority about contractor licensing requirements.
Improper installation and/or operation could create carbon monoxide gas and flue gases which could
cause serious injury or death. Improper installation and/or operation will void the warranty.
Exhaust from this pool heater contains carbon monoxide, a dangerous, poisonous gas you cannot
see or smell. Symptoms of carbon monoxide exposure or poisoning include dizziness, headache,
nausea, weakness, sleepiness, muscular twitching, vomiting and inability to think clearly. IF YOU
EXPERIENCE ANY OF THE ABOVE SYMPTOMS, IMMEDIATELY TURN OFF THE POOL
HEATER, LEAVE THE VICINITY OF THE POOL OR SPA AND GET INTO FRESH AIR IMMEDIATELY.
THE POOL HEATER MUST BE THOROUGHLY TESTED BY A GAS PROFESSIONAL BEFORE
RESUMING OPERATION.
EXCESSIVE CARBON MONOXIDE EXPOSURE CAN CAUSE BRAIN DAMAGE OR DEATH.
Install this pool heater far from open windows, doors, vents and other openings, see page 16 for
minimum distances.
Pentair strongly recommends that all vents, pipes and exhaust systems be initially and periodically
tested for proper operation. This testing can be accomplished by using a hand-held carbon monoxide
meter and/or by consulting with a gas professional.
Pool heaters must be used in conjunction with carbon monoxide detectors installed near the pool
heater. The carbon monoxide detectors must be periodically inspected for proper operation so as to
insure continued safety. Broken or malfunctioning carbon monoxide detectors must be replaced
immediately.
WARNING — This heater is equipped with an unconventional gas control valve that is factory set with a
manifold pressure of 11 ± 5 Pa. Improper installation, adjustment, alteration, service or maintenance
can cause property damage, personal injury or loss of life. Installation or service must be performed
by a qualified installer, service agency or the gas supplier. If this control is replaced, it must be
replaced with an identical control.
Do not attempt to adjust the gas flow by adjusting the regulator setting.
WARNING — Risk of fire or explosion from incorrect fuel use or faulty fuel conversion. Do not try to run a
heater set up for natural gas on propane gas or vice versa. Only qualified service technicians should
attempt to convert heater from one fuel to the other. Do not attempt to alter the rated input or type of
gas by changing the orifice. If it is necessary to convert to a different type of gas, consult your Pentair
dealer. Serious malfunction of the burner can occur which may result in loss of life. Any additions,
changes, or conversions required in order for the appliance to satisfactorily meet the application
needs must be made by a Pentair dealer or other qualified agency using factory specified and
approved parts. The heater is available for use with natural gas or LP (propane) gas only. It is not
designed to operate with any other fuels. Refer to the nameplate for the type of gas the heater is
equipped to use.
• Use heater only with the fuel for which it is designed.
• If a fuel conversion is necessary, refer this work to a qualified service technician or gas supplier
before putting the heater into operation.

P/N 474131 Rev. D 27-06-11
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Section 2. Introduction
SAFETY INFORMATION, (cont’d.)
WARNING — Risk of fire or explosion from flammable vapors. Do not store gasoline, cleaning fluids, varnishes,
paints, or other volatile flammable liquids near heater.
WARNING — Risk of explosion if unit is installed near propane gas storage. Propane (LP) gas is heavier
than air. Consult local codes and fire protection authorities about specific installation requirements
and restrictions. Locate the heater away from propane gas storage and filling equipment as specified
by the Standard for the Storage and Handling of Liquefied Petroleum Gases (latest edition).
WARNING — Risk of fire. Do not place articles on, near or against the heater.
WARNING — Risk of burn hazard. To reduce the risk of injury, do not touch the side heater vent cover when the
heater is operating. Side heater vent covers are HOT and can burn when touched causing personal
injury. Do not allow children to play on or around heater or associated equipment.
WARNING — Risk of asphyxiation if exhaust is not correctly vented. Follow venting instructions exactly
when installing heater. Do not use a drafthood with this heater, as the exhaust is under
pressure from the burner blower and a draft hood will allow exhaust fumes to blow into the room
housing the heater. The heater is supplied with an integral venting system for outdoor installation.
CAUTION — Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation. Wiring errors can also destroy the control board.
• Connect heater to 240 Volt, 50 Hz., Single Phase power only.
• Verify proper operation after servicing.
• Do not allow children to play on or around heater or associated equipment.
• Never allow children to use the pool or spa without adult supervision.
• Read and follow other safety information contained in this manual prior to operating this pool heater.
GENERAL SPECIFICATIONS
NOTICE:
• Combustion air contaminated by corrosive chemical fumes can damage the heater and will void the warranty.
• The Combination Gas Control Valve on this heater differs from most appliance gas controls. If it must be replaced,
for safety reasons replace it only with an identical gas control.
• The access door panels must be in place to provide proper ventilation. Do not operate the heater for more than five (5)
minutes with the access door panels removed.
• This heater is design certified by IAPMO as complying with the Standard for Gas Fired Pool Heaters, and is intended
for use in heating fresh water swimming pools or spas.
• The heater is designed for the heating of chlorine, bromine or salt system swimming pools and spas. It should NOT be
used as a space heating boiler, or general purpose water heater. The heater requires an external 240 VAC
single-phase electric power source.
• The heater should be located in an area where leakage of the heater 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, adequately drained, be installed under the heater. The pan must not restrict air flow.
• The heater may not be installed within 3.5M (11.5 ft.) of the inside surface of a pool or spa unless it is separated by a
solid fence, wall or other permanent barrier.
Vent
Cover

Rev. D 27-06-11 P/N 474131
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Section 3. Installation
Installation Instructions
Gas
Air
Mixer
Blower
Inlet
(Cold
Water)
Exhaust
Heating Coils
Outlet
(Mixed
Water)
Burner
Figure 1.
THIS PRODUCT MUST BE INSTALLED AND SERVICED BY A PROFESSIONAL SERVICE TECHNICIAN, QUALIFIED IN POOL
HEATER INSTALLATION.
Pentair strongly recommends that all vents, pipes and exhaust systems be initially and periodically tested for proper operation. This
testing can be accomplished by using a hand-held carbon monoxide meter and/or by consulting with a gas professional.
Pool heaters must be used in conjunction with carbon monoxide detectors installed near the pool heater. The carbon monoxide
detectors must be periodically inspected for proper operation so as to insure continued safety. Broken or malfunctioning carbon
monoxide detectors must be replaced immediately.
HEATER DESCRIPTION
Figure 1 is a diagram of the heater showing how it operates. Precisely
matched orifice plates meter the air and gas into the mixer. The blower
draws the air and gas through the mixer and forces it into the burner’s
flame holder. A sealed heat exchanger surrounds the flame holder,
discharging exhaust gases out the flue.
Five (5) cm PVC water piping connects directly to the manifold/
header on the heat exchanger using 5 cm PVC slip unions provided
with the heater. The outer manifold remains cool; no heat sinks are
required. A thermal regulator and an internal bypass regulate the water
flow through the heat exchanger to maintain the correct outlet
temperature. The heater operator control panel board assembly is
located on top of the heater.
SEQUENCE OF OPERATION
An electronic temperature sensing thermistor in the manifold adapter inlet controls the heater operation. When the inlet
water temperature drops below the temperature set on the operating control, the burner controller supplies power to
the combustion air blower through a series of safety interlocks. The interlocks consist of:
• the pressure switch (PS), which senses that the pump is running,
• the high limit switch (HLS), which opens if the heat exchanger outlet temperature goes above 53° C (127° F), and
• the air flow switch (AFS), which senses the pressure drop across the air metering orifice,
• the automatic gas shut-off (AGS) switch, which opens if the heat exchanger outlet temperature goes above 60° C (140° F).
• the stack flue sensor (SFS), which shuts down the heater if the flue gas temperature reaches 249° C (480° F).
The air flow switch (AFS) senses the pressure drop across the air metering orifice. As soon as there is sufficient air flow,
the AFS closes, closing the circuit to the hot surface igniter (HSI), which ignites the fuel mixture. On a call for heat, the
blower and HSI are energized. In about 20 seconds, the gas valve opens and ignition occurs. The HSI then switches to a
sensing mode and monitors the flame.
The heater is equipped with a digital operating control that enables the user to pre-set the desired pool and spa water
temperatures. The control enables the user to select between pool and spa heating, and features a digital display that
indicates the water temperature.
PUTTINGTHE HEATER INTO SERVICE
If the heater is installed below the level of the pool, or more than 0.6 meters (2 feet) above pool level, the pressure switch
setting should be adjusted. See “WATER PRESSURE SWITCH” in the “SAFETY CONTROLS Section” (page 32) and
the “CAUTION” under “BELOW POOL INSTALLATION Section” (page 12).
Before putting the heater into service for the first time, follow the instructions under “BEFORE START-UP” (page 30) in
the front of this manual. Check for proper operation of the heater by following the steps under “OPERATION
INSTRUCTIONS.”
Damage to equipment caused by improper installation or repair will void the warranty.

P/N 474131 Rev. D 27-06-11
10
Section 3. Installation
These installation instructions are designed for use by qualified personnel only, trained especially for installation of this
type of heating equipment and related components. Some states require installation and repair by licensed personnel. If
this applies in your state, be sure your contractor bears the appropriate license. See Figure 2 for Outdoor Installations.
SPECIFICATIONS
Figure 2.
53.3 cm
(21.0")
82.8 cm
(32.61")
58.5 cm
(23.02")
71.5 cm
(28.15")
40.6 cm
(16")
TOPFRONT
EXHAUST SIDE PLUMBING SIDE
25.7 cm
(10.13")
14.2 cm
(5.6")
ELECTRICAL
CONDUIT PORT
71.6 cm
(28.2")
57.7 cm
(22.7")
40.6 cm
(16.0")
DIMENSIONS IN CENTIMETERS & INCHES