Pentair ETi 400 User Manual

Page 1

ETi® 400 HIGH EFFICIENCY HEATER

INSTALLATION AND USER’S GUIDE

FOR YOUR SAFETY - READ BEFORE OPERATING

If you do not follow these instructions exactly, a re or explosion may result, causing property damage, personal injury or loss of life. For additional free copies of this manual; call USA (800) 831-7133

FOR Y OUR 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, ﬁre or explosion, and ﬂue gases which can cause serious injury, property damage, or death. For indoor installations, as an additional measure of safety, Pentair Water Pool and Spa, 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.

Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or death. Installation and service must be performed by a qualied installer, service agency or the gas supplier.

120 / 240 VAC NATURAL GAS / LP GAS

Model Natural

ETi® 400 NA - ASME 461113

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

FOR

YOUR

• 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 re department.

SAFETY

DO NOT store or use gasoline or other ammable vapors and liquids in the vicinity of this or other appliances.

OWNER:

Retain For

Future

Reference

1620 Hawkins Ave., Sanford, NC 27330

10951 W. Los Angeles Ave., Moorpark, CA 93021

Pentair Water Pool and Spa, Inc.

• (800) 831-7133 or (919) 566-8000

• (800) 831-7133 or (805) 553-5000

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Customer Service and Technical Support

If you have questions about ordering Pentair Water Pool and Spa, Inc. replacement parts, and pool products, please call:

Phone: (800) 831-7133 Fax: (800) 284-4151

(8 AM to 7:30 PM Eastern Time/Paciﬁc Time)

Web sites: www.pentair.com

P/N 475349 Revision E. 3/2020

Page 3

Contents

Warning and Safety Information ............................................................................... 5

Important Notices ........................................................................................................................................... 5

Heater Application Information ....................................................................................................................... 5

Code Requirements ........................................................................................................................................ 6

Consumer Information and Safety Information ............................................................................................... 6-8

General Speciﬁcations .................................................................................................................................... 9

Heater Identication Information .............................................................................. 9

Section 1. Operation Instructions .............................................................................. 10

Operator Control Panel ................................................................................................................................... 10-11

Basic System Operation ................................................................................................................................. 11

Heater DSI Electronic Ignition Lighting/Operation ...................................................................................... 11

Start-Up Operation .................................................................................................................................... 12

Putting the Heater into Service .................................................................................................................. 12

Heater Operating Instructions .................................................................................................................... 13

To Turn Off Gas to the Appliance ................................................................................................................... 13

Safety Controls (Air Flow Switches, Water Pressure Switches, Hight Limit Shut-Off Switches) .................... 14-15

(Stack Flue Sensor, Thermal Fuse, Float Switch)

Ignition Module Operation .......................................................................................................................... 15

Section 2. Installation ................................................................................................. 16

Heater Description .......................................................................................................................................... 16

Putting the Heater into Service ....................................................................................................................... 16

Sequence Of Operation .................................................................................................................................. 17

Speciﬁcations ................................................................................................................................................. 17-18

Plumbing Connections .................................................................................................................................... 19

Water Connections ......................................................................................................................................... 19

Multiple Heater Connections .......................................................................................................................... 20

Valves ............................................................................................................................................................. 21

Manual By-Pass ............................................................................................................................................. 21

Below Pool Installation ................................................................................................................................... 21

Gas Connections ............................................................................................................................................ 22

Gas Pipe Sizing ............................................................................................................................................. 22

Gas Pressure Testing ..................................................................................................................................... 23

Checking Gas Pressure Through Gas Control Valve ..................................................................................... 23

Sediment Traps .............................................................................................................................................. 24

Outdoor Installation (US and Canada) ........................................................................................................... 24-26

Outdoor Installation Venting Guidelines .................................................................................................... 26

Heater Clearances - Outdoor .................................................................................................................... 28

Indoor Venting — General Requirements (Category IV Vertical and Horizontal requirements) .................... 28

Heater Clearances — General Requirements (Indoor and Outdoor Installation for US and Canada) ........ 28

Direct Air Intake Cover ................................................................................................................................... 28

Combustion Air Supply ................................................................................................................................... 29

Air Supply Requirements Guide for the ETi 400 Heater ............................................................................. 29

Direct Air Intake Exhaust Duct using 4-inch PVC Pipe (Indoor Installation) ............................................... 30-36

Direct Air Intake Kit Installation (Combustion Air Supply) ........................................................................... 31

Corrosive Vapors and Possible Causes ......................................................................................................... 32

Horizontal or Vertical Venting (Category IV) - Positive Pressure .................................................................. 33

Vent Installation (Indoor Installation for U.S. or Outdoor Shelter for Canada) ................................................ 34

Direct Vent Requirements .............................................................................................................................. 34-35

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Contents

Section 2. Installation (Continued) .............................................................................. 38

Vent Installation - Indoor Installation (US and Canada) ................................................................................. 36

Garage or Utility Room Installation (Vent Installtion - Indoor Installation US and Canada) ............................ 37

Final Installation Check .................................................................................................................................. 37

Condensate Management (Maintenance, Condensate Neutralizer Cartridger Drain/Tubing Installation) ...... 38

Electrical Connections .................................................................................................................................... 39

Bonding ..................................................................................................................................................... 39

120 VAC / 240 VAC Wiring ......................................................................................................................... 40

Remote Control Connections ......................................................................................................................... 41

Fireman’s Switch Connection ......................................................................................................................... 41

Heater Connection Wiring Diagram ................................................................................................................ 42

Heater Ladder Wiring Diagram ....................................................................................................................... 43

Section 3. Troubleshooting ........................................................................................ 44

Initial Troubleshooting and Error / Fault Codes .............................................................................................. 44

Initial Troubleshooting Chart ........................................................................................................................... 45

Heater Will Not Fire A .................................................................................................................................. 46

Heater Will Not Fire B .................................................................................................................................. 47

Diagnostics LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS ....................................................................... 48-52

Burner Troubleshooting .................................................................................................................................. 53

Heat Exchanger Troubleshooting ................................................................................................................... 53

Operator Control Panel Displays RNC Code .................................................................................................. 53

Section 4. Maintenance and Care Instruction .......................................................... 54

Care and Maintenance ...................................................................................................................... 54

TitanTough Heat Exchanger Assemblies Annual Inspection ............................................................ 54

Burner Spark Electrode and Flame Sensor Rod Annual Inspection ................................................. 55

Pressure Relief Valve (50 psi)........................................................................................................... 55

After Start-Up .................................................................................................................................... 56

Spring and Autumn ....................................................................................................................... 56

Winter Operation and Winterization .............................................................................................. 56

Return the Heater to Service............................................................................................................. 57

Maintaining Pool Temperature .......................................................................................................... 57

Energy Saving Tips ....................................................................................................................... 57

Chemical Balance ............................................................................................................................. 58-59

Section 5. Heater Replacement Parts........................................................................ 60-66

Heater Replacement Parts List ......................................................................................................... 61

General Replacement Parts .............................................................................................................. 61

Heater Heat Exchanger and Blower Assemblies Replacement Parts............................................... 64

Heater Manifold Assembly - Inlet and Outlet Assembly Replacemant Parts .................................... 64

Heater Condensate and Exhaust Assembly Replacement Parts ...................................................... 65

Heater Operator Control Panel Assembly Replacement Parts ......................................................... 66

Page 5

Warning and Safety Instructions

IMPORTANT SAFETY INSTRUCTIONS

READ AND FOLLOW ALL INSTRUCTIONS

SA VE THESE INSTRUCTIONS

400 High Efﬁciency Pool and Spa Heater

ETi

Thanks you for choosing the Pentair ETi

of your new heating system, and correct chemical maintenance of the water will ensure years of heater operation. The ETi 400 High Eciency heater is equipped with Pentair advanced heater technology which includes a multifunction temperature controller to continuously monitor the heater for proper operation. ETi 400 High Eciency heaters are designed with direct spark ignition (DSI) for on demand heat, which eliminates the need for a standing pilot.

SPECIAL INSTRUCTIONS T O OWNER: Retain this manual for future reference. This instruction manual provides operating instructions, installation and service information for the heater. 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 ETi 400 High Eciency heater. 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

400 High Eciency Pool and Spa Heater. With proper installation and service

For the installer and operator of the ETi 400 High Eciency 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 any more information, or if you have any questions regarding to this pool heater, please contact Pentair Water Pool and Spa Customer Support at (800) 831-7133.

HEATER APPLICATION INFORMATION

The ETi 400 Heater is sold with a limited factory warranty. Pentair Water Pool and Spa high standards of excellence include a policy of continuous product improvement resulting in your advanced technology pool and spa heater. Pentair reserves the right to make improvements which change the specications of the heater without incurring an obligation to update the current heater equipment.

The ETi 400 Heater is designed for the heating of chlorine, bromine or salt system swimming pools and spas. The heater 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.

CODE REQUIREMENTS

Installation must be in accordance with all local codes and/or the latest edition of the National Fuel Gas Code, ANSI Z223.1 and the latest edition of the National Electrical Code, NFPA 70 (US).

Installation in Canada must be in accordance with the latest CAN/CGA-B149.1 or .2 and CSA C22.1 Canadian Electric Code, part 1.

The heater, when installed, must be electrically grounded and bonded in accordance with local codes, or, in absence of local codes, with the National Electrical Code, ANSI/NFPA70 (US) or in Canada in accordance with the Canadian Electric Code, part 1 as applicable.

The ETi 400 Pool Heater meets the requirements of the ASME Boiler and Pressure Vessel Code.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Warning and Safety Instructions

CONSUMER INFORMATION AND SAFETY

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 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.

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 102° F (39° C) can cause fetal damage during the rst three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant women should stick to the 100° F (38° 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 error in regulating water temperatures by as much as 4° F (2.2° 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.

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.

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 certied 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.

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Warning and Safety Instructions

SAFETY INFORMATION

The ETi® 400 High Efﬁciency Pool and Spa 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. Throughout this 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 toxic levels of 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.

• NEVER use this pool heater indoors without speciﬁed ventilation system (and properly installed vent pipe).

• NEVER use this pool heater in the home or in partly enclosed areas (such as garages), unless the speciﬁed ventilation system is used. If used outdoors, install far from open windows, doors, vents and other openings.

• 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 — FOR YOUR SAFETY

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.

WARNING — This heater is equipped with an unconventional gas control valve that is factory set at a

pressure of -.2 inches wc. 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.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Warning and Safety Instructions

SAFETY INFORMATION (continued)

WARNING — Risk of ﬁre or explosion from incorrect fuel use. 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 an LP (propane) gas conversion is necessary, this MUST be done by a qualiﬁed professional service technician qualiﬁed in pool heater installation or by qualiﬁed gas supplier before the herater is operational.

WARNING — Risk of ﬁre or explosion from ﬂammable vapors. Do not store gasoline, cleaning ﬂuids, varnishes, paints,

or other volatile ﬂammable liquids near heater or in the same room with 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, CAN/CSA B149.2 (latest edition) or ANSI/NFPA 58 (latest edition).

WARNING — Risk of ﬁre, carbon monoxide poisoning, or asphyxiation if exhaust venting system leaks. Only qualiﬁed

service technicians should attempt to service the heater, as leakage of exhaust products or ﬂammable gas may result from incorrect servicing.

WARNING — Risk of asphyxiation if exhaust is not correctly vented. Follow venting instructions exactly when installing

heater. Do not use a draft hood 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 indoor installation. Canada: In Canada, this pool heater can only be installed

outdoors or in an enclosure that is not normally occupied and has no openings directly into occupied areas. See Page 25 - 29 for enclosure venting requirements.

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 120 or 240 Volt, 60 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.

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.

Page 9

Warning and Safety Instructions

ETI 400 NA ASME

ETi = High Efficiency

FUEL TYPE =

CONSTRUCTION =

MODEL SIZE = BTU INPUT in 1000 of BTU / HR

H. I. N.

HEATER IDENTIFICATION NUMBER

ID DESIGNATOR FOR PENTAIR WATER POOL AND SPA, ETi HEATER

NA = NATURAL GAS

Example:

1 2 3 4

ASME = COMMERCIAL MODEL

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 diers from most appliance gas controls. If it must be replaced, for safety reasons replace it only with an identical gas control valve.

• The heater’s access side panels must be in place to provide proper ventilation and to avoid water intrusion. Do

not operate the heater for more than ve (5) minutes with the side panels removed.

• This heater is certied by CSA International as complying with the Standard for Gas Fired Pool Heaters,

ANSI Z21.56/CSA 4.7, and is intended for use in heating fresh water swimming pools or spas.

• The ETi

It should NOT be used as a space heating boiler, or general purpose water heater.

• 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 ow.

• The heater may not be installed within 5 ft. (1.5M ) of the inside surface of a pool or spa unless it is separated by a solid fence, wall or other permanent barrier.

• In the United States, installation must be in accordance with local codes and the most recent edition of the National Fuel Gas Code, ANSI Z223.1/NFPA-54. The Code can be obtained from: National Fire Protection Association 1 Batterymarch Park Quincy, MA 02169 www.nfpa.org

• In Canada, install the heater in accordance with local codes and the most recent edition of the Natural Gas and Propane Installation Code, CAN/CSA B149.1.

400 Heater is designed for the heating of chlorine, bromine or salt system swimming pools and spas.

Heater Identiﬁcation Information (HIN)

To identify the heater, see 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 Identication Number (HIN).

Heater Identiﬁcation Number (HIN)

The following example simpliﬁes the identiﬁcation system:

1) ETi

2) Model Size : (400) : Input rating (Btu/hr) X 1000

3) Fuel Type : NA = Natural gas

4) Construction : ASME = Commercial Model

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Temperature

Up and Down

Digital Temperature

Display

System Operation

Indicator Lights

Dual Temperature

Controls

Heater "OFF"

Switch

Section 1: Operation Instructions

OPERATOR CONTROL PANEL

TEMPERATURE SETTING

The ETi

400 Heater is shipped factory set at 70° F (35° C) for pool mode and 95° F (21° C) for spa mode. Using the up and down arrows, you can set the thermostats to a minimum temperature of 65° F (18.3° C), or a maximum of 104° F (40° C).

The heater operator controls are as follows:

POOL ON Press this button to control the heater operation by the pool temperature setting. SPA ON Press this button to control the heater operation by the spa temperature setting. HEATER OFF Press this button to switch o the heater.

▲ TEMP Press this button to raise the temperature setting. ▼ TEMP Press this button to lower the temperature setting.

To toggle the display between degrees Centigrade (°C) and degrees Fahrenheit (°F):

1. Press the HEATER OFF button to switch the heater OFF.

2. Press ▲ TEMP or ▼ TEMP for 5 seconds. The display will ash once and change modes (°C to °F or vice versa).

3. Press the HEATER OFF button to switch the heater ON.

When either the ▲ TEMP or ▼ TEMP buttons are depressed, the digital display will indicate the temperature setting.

After ve seconds, the display will return to the actual pool/spa temperature.

In addition to the digital temperature display, there are ve indicator lights:

The POOL ON light indicates the pool water temperature is controlling the heater operation. The SPA ON light indicates the spa water temperature is controlling the heater operation. The HEATING light comes on and stays on when the heater’s burner chamber is ring. This light should be on whenever

the burner is on. This light blinks when the heater is calling for heat but not ring. If this light is on but the burner fails to come on, one of the “service” lights should come on, indicating a fault in the system.

The SER VICE SYSTEM light indicates that there is insucient water ow to the heater. If the pump is operating, this

usually indicates that the lter and/or skimmers should be cleaned (some lters may require back-washing). If the light remains on after the lter/skimmers have been serviced, the system should be checked by a qualied service technician.

The SER VICE HEATER light indicates a fault in the heater or its controls. If this light comes on, shut down the heater (See TO TURN OFF GAS T O THE APPLIANCE on page 13), and have a qualied service technician check the system.

Page 11

Section 1: Operation Instructions

OPERATOR CONTROL PANEL

VIEW FAULT CODES: Press the POOL ON button and the ▲ TEMP button to view the last fault code.

Press the ▲ TEMP button to scroll up to view the previous 4th. fault codes. The next message displayed after the

5th. fault code is END.

VIEW STACK FLUE GAS TEMPERATURE: Press and hold the POOL ON (or SPA ON) button for more than 5

seconds to view the current Stack Flue Gas temperature. Each heat exchange has one temperature sensor (SF1 and (SF2), the SF1 temperature is displayed on the heater’s LCD with a dot on the upper left corner of the LCD. Scroll up or down to display the SF2 current temperature and the dot will not be displayed on the LCD.

BASIC SYSTEM OPERATION

Start the pump. Be sure the pump is running and primed to close the water pressure switch and supply power to heater. Be sure the pool and/or spa is properly ﬁlled with water. Follow the Lighting and Operating instructions below.

WARNING

Risk of explosion or ﬁre causing burns or death if safety interlocks are disabled. DO NOT attempt to operate heater when SERVICE HEATER light is on or if blower or burner will not start. Instead, follow instructions under “To Switch Off Gas to the Appliance,” and call a qualiﬁed service technician to repair unit.

HEATER DSI ELECTRONIC IGNITION LIGHTING/OPERATION

FOR YOUR SAFETY: READ BEFORE LIGHTING

WARNING

If you do not follow these instructions exactly, a ﬁre or explosion may result causing property damage, personal injury or loss of life.

Do not attempt to light the heater if you suspect a gas leak. Lighting the heater can result in a ﬁre or explosion which can cause personal injury, death, and property damage.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 1: Operation Instructions

BASIC SYSTEM OPERATION (CONTINUED)

START-UP AND OPERATION

START-UP AND SHUTDOWN INSTRUCTIONS ARE ON THE LABEL ATTACHED TO THE INSIDE COVER OF THE APPLIANCE WATER CONNECTION PANEL.

BEFORE START-UP

A. This appliance does not have a pilot. It is equipped

with an ignition device which automatically lights the burners. DO NOT try to light the burners by hand.

B. BEFORE OPERATING, smell all around the appliance

area for gas. Be sure to smell next to the oor because some gas is heavier than air and will settle on the oor.

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.

C. Use only your hand to turn the gas control on or o.

Never use tools. If you cannot change the ON/OFF setting by hand, don’t try to repair it, call a qualied service technician. Forced or attempted repair may result in a re or explosion.

D. Do not use this heater if any part has been under water.

Immediately call a qualied service technician to inspect the heater and to replace any part of the control system and any gas control which has been under water.

E. Do not operate the pool heater unless the pool or spa is

properly lled with water.

F. Before operating the appliance for the rst time or

after it has been o for an extended time, perform the following checklist:

1. Remove debris or other articles from inside the heater and the area around the heater and its exhaust vent. Make sure the ventilation openings are clear of debris or obstruction. For installations in an enclosed space, make sure openings for combustion and ventilation air are unobstructed.

2. Keep heater area clear and free from combustibles, ammable liquids and chemicals.

3. Check that all water connections are tight.

4. Water must be owing through the heater during operation. Make sure that pool/spa is lled with water and have pump operating. Check that water ow is unobstructed from the appliance. When operating for the rst time or after an extended shut-down, run lter pump for several minutes to clear all air from the system.

PUTTING THE HEATER INTO SERVICE

If the heater’s Water Pressure Switches (PS) are below or above the water level by 1 ft (30 cm), after the heater

installation the Water Pressure Switch setting should be adjusted. See WATER PRESSURE SWITCH, in SAFETY

CONTROLS on page 14.

Note: Before putting the heater into service for the rst time, follow the instructions under BEFORE START-UP on page 12. Check for proper operation of the heater by following the steps under OPERATING INSTRUCTIONS on page 13. Damage to equipment caused by improper installation or repair will void the warranty.

Page 13

Section 1: Operation Instructions

HEATER OPERATING INSTRUCTIONS

1. STOP! Read the safety information on (page 12).

2. Set both pool and spa thermostats to the lowest settings.

3. Turn o all electric power to the appliance.

4. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the

burner by hand.

5. Remove the access door panels by unfastening the latch located on each

door, then lift up and out from the bottom of the panel

to remove.

6. Toggle-Style Valve: Pull toggle toward you to turn gas o ,

see Figure 1.

7. Wait ve (5) minutes to clear out any gas. If you then smell gas,

STOP! Follow B in the BEFORE START-UP instructions on page 12.

If you don’t smell gas, go to the next step.

8. Push the toggle switch away from you to switch the gas on.

9. Replace the Door Access Panels. All panels must be in place when operating the heater.

10. Set 3-way valves on inlet and outlet to pool or spa, as appropriate.

11. Turn on all electric power to the appliance.

12. Press either the POOL ON or SPA ON button switch on the operating control.

13. Set the thermostat to desired setting. NOTICE: Setpoint must be above actual water temperature or burner

will not re. See OPERATOR CONTROL PANEL on page 11.

14. The blower should come on immediately, and after about 15 seconds, the burner should re. When operating for the rst time, the burner may not re on the rst try because of air in the gas line. If it does not re at rst, push the OFF switch, wait ve minutes, and again push the POOL or SPA ON switch. The burner should re after about 15 seconds. You may have to repeat this until all of the air has cleared the gas line.

15. The burner should re until the pool/spa temperature reaches the desired temperature set on the thermostat. The blower will continue to run for about 45 seconds after the burner shuts o. If any of the safety interlocks should open during burner operation, the burner shuts o immediately, but the blower continues to run for about 45 seconds. Should overheating occur or the gas supply fail to shut o, turn o the manual gas control valve to the appliance.

16. If the appliance will not operate, follow the instructions TO TURN OFF GAS TO THE APPLIANCE below,

and call your service technician or gas supplier.

Gas control is shown OFF. Push toggle switch away from you to switch ON.

Figure 1.

17. If the electrical power is shut o to the heater while it is running, once power is restored, the heater will power up with the previous programed settings.

TO TURN OFF GAS TO APPLIANCE

1. Press the OFF button on operating control.

2. Switch o all electric power to the unit.

3. Remove the access door panels.

4. Toggle-Style Valve: Pull toggle toward you to turn gas o, see Figure 1.

5. Replace the Access Door Panels.

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Page 14

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

A reference scale is on the back of pressure switch

Turn star wheel clockwise to raise pressure set point if water pressure switch is more than 1 ft (30 cm) below water level

Turn star wheel counterclockwise to lower pressure set point if pressure switch is more than 1 ft (30 cm) above water level

Water Pressure

Switch

Star Wheel

Section 1: Operation Instructions

SAFETY CONTROLS

AIR FLOW SWITCH (AFS)

There are two air ow switches, (see Figure 2), designed as a safety device to ensure the two combustion air blowers (fans) are operating and are monitoring the dierential (negative) pressure within the blower housing. These air pressure switches are factory set. The switches (see page 63 #29) are connected upstream of the ignition module. The ignition module does not operate unless the air ow switches and all safety switches are closed.

WATER PRESSURE SWITCHES

Hazardous pressure. Do not bypass the Water Pressure Switches or render it inoperable.

The heater has two Water Pressure switches, see Figure 3. If the water ow is restricted, the water pressure switches may prevent the burner from ring and cause the Service

System LED indicator to go on. Note: If the light remains

on after the lter has been serviced, have a qualied service technician check the system.

For deck-level heater installations, the Water Pressure

switches are factory set at 3.00 psi (20.6 kPa). Note:

See Below Pool Level Installation, on page 21. If the pressure switches are 1 ft (0.3M) below or above the pool water level, reset the switches so that it is open when the pump is o and closed when the pump is running. Turn the star-wheel on the switch clockwise ( ) to raise setting (heater below the pool level) and counterclockwise ( ) to lower the setting (heater above the pool level), see Figure 4. Test each switch after resetting.

WARNING

Figure 2. Air Flow Switch

Water Pressure

Switch

Star Wheel

Figure 3: Water Pressure Switch

NOTICE: When the heater is mounted more than 1 ft (30 m) above or 1 ft (30 cm) below the deck level, a pressure switch is no longer adequate. A Flow Switch must be installed instead.

CAUTION! Heater operation with an incorrect water pressure switch setting, may cause the heater to operate without sufﬁcient water ﬂow, and may cause severe heater damage.

HIGH LIMIT SWITCH AND AUTOMATIC GAS SHUT-OFF SWITCHES (AG1 AND AG2)

A High Limit Switch (HLS), is a safety device that opens the electrical circuit and shuts o the heater based on a water temperature set point within the HLS. The

heater contains two AGS switches and one HLS

switch. The AGS switches are located in the outlet plumbing assembly, and the HLS switch is located on the main Inlet/Outlet Header (see page 16).

Figure 4.

Page 15

Section 1: Operation Instructions

SAFETY CONTROLS (continued)

STACK FLUE SENSORS (SF1, SF2)

The heater is equipped with two Stack Flue sensors; one for each heat exchanger. These sensors monitor the stack ue temperature and if needed will shut down the heater if the stack ue temperature exceeds 170° F (77° C).

THERMAL FUSE

A Thermal Fuse (TF) is a safety protection device that opens the electrical circuit if the temperature reaches 187° F (86° C). The fuse cannot be reset, it must be replaced. See page 17 for more information.

FLOAT SWITCH

The Float Switch (FS) is a sensing application that shuts down the heater once the condensate level exceeds the permitted level in the condensate container. See page 17 for more information.

IGNITION MODULE OPERATION

The Ignition Module, (Figure 5), is microprocessor based and operates on 24VAC supplied by the transformer. The control works in conjunction with a fan control board (Figure 6), and utilizes a microprocessor to continually safely monitor, analyze, and control the proper operation of the gas ame holder. The module with the presence of the ame sensor, using ame rectication, allows the heater to operate.

Flame Current

Check Point

Diagnostic LED 1 Flash - Air Flow Fault 2 Flashes - Flame No Call for Heat 3 Flashes - Ignition Lockout

Figure 5. Ignition Control Module

Heater left side panel removed

PS1 PS2

START

NC IN

FAN1

FAN2

UNUSED

GND

R 24 VAC

Figure 6. Fan Control Circuit Board

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

THIS HEATER 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 consult- ing with a gas professional. Pool and spa 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

The ETi

400 Heater has precisely matched orice plates to 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 ame holder. A sealed TitanTough™ Heat Exchanger surrounds the ame holder, discharging exhaust gases out the ue (See Figure 7 & 8). Use a 2 in tting to connect to the 2 in PVC slip unions provided with the heater. The outer manifold remains cool; no heat sinks are required. The heater operator control panel is located on the side of the heater.

Vent Cap CPVC Flue

Outlet

Upper Heat

Exchanger

Lower Heat

Exchanger

Auto gas

shut-off

switch (AGS)

Tubing for

Condensate

Neutralizer

Cartridge

Inlet Plumbing Assembly

High Limit Switch (HLS)

Electrical and Bonding lug

To drain

Tridicator (Water pressure and Temperature gauges)

Upper Blower

Assembly

Lower Blower

Assembly

2-in Inlet Plumbing Assembly

2-in Outlet Plumbing Assembly

To drain

Exhaust Assembly

Figure 7. ETi® 400 Heater (Left Side View)

Condensate Neutralizer Cartridge

(Optional, P/N 475612 sold separately).

The cartridge may be mounted onto the heater

base for heater outdoor installation.

Figure 8. ETi® 400 Heater (RIght Side View)

Heater Base (Top View)

Page 17

Section 2: Installation Instructions

Heater Top Vie w

762

30.0

863.6

34.0

1012.8

39.9

548.1

21.6

664.9

26.2

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 operator control panel, the control board supplies power to the combustion air blowers through a series of safety interlocks. The heater interlocks consist of:

• the two water pressure switches (PS), which senses that the pump is running,

• the tridicator gauges (2) which monitors the water temperature in degree Fahrenheit and pressure in psi.

• the high limit switch (HLS), which opens if the heat exchanger outlet temperature goes above 135° F (57° C), and

• the two air ow switches (AFS), sense the pressure drop across the air metering orices.

• the two thermal fuses (TF) open if the ue gas temperature reaches 187° F (86° C).

• the automatic gas shut-o (AG1, AG2) switches, which open if the heat exchanger outlet temperature goes above

150° F (66° C).

• the oat switch (FS) which opens if the condensate overows at the oat switch due to blockage in the condensate

drain hose or neutralizer cartridge.

• the stack ue sensors (SF1, SF1), which shut down the heater if the ue gas temperature reaches 170° F (77° C).

The air ow switches (AFS) sense the pressure dierential between both of the air metering orices. As soon as there is sucient air ow, the AFS closes, completing the circuit to the Fan Conrol board. The gas ignition control then opens the gas valve and the fuel mixture is ignited by the Direct Spark Ignition (DSI). On a call for heat, the blowers are energized for 15 seconds, the gas valve opens simultaneously as the direct spark igniters are energized, then ignition occurs. 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

SPECIFICATIONS

The installation instructions contained in this manual are designed for use by qualied 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 9, 10 & 11 for Outdoor and Indoor installations, dimensions and orientation of the heater.

Dimensions in Millimeters / Inches

Figure 9.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

421.2

16.6

537.3

21.2

243.5

9.6

670.3

26.4

22.2

Ă .88

ELECTRICAL

145.6

5.7

Heater Plumbing Side

2 in WATER INLET CONNECTIONS

1087.5

42.8

108

4.3

38.1

Ă 1.5

GAS

226.6

8.9

4-IN CPVC FLUE EXHAUST SOCKET

1160.5

45.7

CONTROL CONTROL TOUCH PAD/ DISPLAY

4-IN CPVC FLUE EXHAUST SOCKET

BONDING LUG

Heater Rear View

Heater Front View

4-IN PVC AIR INLET CONNECTION (INDOOR OPTIONAL KIT)

4-IN PVC VENT CAP

Section 2: Installation Instructions

SPECIFICATIONS (CONTINUED)

Figure 10.

Figure 11.

Page 19

PUMP

FILTER

HEATER

MANUAL

BY-PASS

POOL

GATE VALVE

FROM

POOL

FROM FILTER

INLET

OUTLET

Section 2: Installation Instructions

PLUMBING CONNECTIONS

The heater has the unique capability of direct schedule 40 PVC plumbing connections. A set of bulkhead ttings is included with the heater to ensure conformity with Pentair’s recommended PVC plumbing procedure. Other plumbing connections can be used. See Figure 12 for plumbing connections.

CAUTION

Before operating the heater on a new installation, turn on the circulation pump and bleed all the air from the ﬁlter using the air relief valve on top of the ﬁlter. Water should ﬂow freely through the heater. Do not operate the heater unless water in the pool/spa is at the proper level. If a manual by-pass is installed, temporarily close it to ensure that all air is purged from the heater.

Figure 12.

WATER CONNECTIONS

The heater requires proper water ow and pressure for its operation. See Figure 13 for the recommended installation. The lter pump discharges to the lter, the lter discharges to the heater, and the heater discharges directly to the pool or spa.

A manual bypass valve should be installed before the heater when the pump ow exceeds 120 GPM (454 LPM ). See WATER FLOW RATE Table 1

on page 21 for setting of the manual by-pass valve.

Make sure that the outlet plumbing from the heater contains no shut-o valves or other ow restrictions that could prevent ow through the heater (except

Main

Drain

Pool

for pool installations as noted below, or winterizing valves where needed). To switch ow between the pool and spa, use a diverter valve. Do not use any valve that can shut o the ow.

Install the chemical feeder downstream of the heater. Install a chemical resistant one-way check valve between the heater and the chemical feeder to prevent back-siphoning through the heater when the pump is o.

From Pool

Figure 13.

3-Way

Valve

Note: For Multiple Heater installation, see page 20.

NOTICE: If the heater is plumbed in backwards, it will cycle continuously. Make sure piping from lter is not reversed

when installing heater.

Connect the heater directly to 2 in PVC pipe, using the provided unions. Heat sinks are not required. The low thermal mass of the heater will prevent overheating of the piping connected to the pump even if the heater shuts down unexpectedly.

Occasionally a two-speed pump will not develop enough pressure on the low speed to operate the heater. In this case, run the pump at high speed only to operate the heater. If this does not solve the problem, do not try to run the heater. Instead, correct the installation.

Do not operate the heater while an automatic pool cleaner is also operating. If the circulation pump suction is plugged (for example by leaves), there may not be adequate ow to the heater. Do not rely on the pressure switch in this case.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

3-Way

Valve

Spa

Chlorinator

Check Valve

Heater

Filter

Pump

3-Way

Valve

Page 20

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

TOP INLET PORT (COLD WATER)

LOWER OUTLET PORT (HOT WATER)

Firgue 15. Four ETi 400 Heaters Plumbing Hydraulic Diagram

To balance the system, extend the pipe 12 inches (305 mm) past the end of the heater inlet.

Optional Check Valves and Flow Meters on the heater inlets can help to balance the system.

To balance the system,

extend the pipe 12 inches

(305 mm) past the

end of the heater inlet.

Flow Meter

Section 2: Installation Instructions

MULTIPLE HEATER INSTALLATION

All plumbing on multiple heater installations must be done in parallel. See Figure 14 and Figure 15. To prevent heater overheating and to ensure heater longevity, water ow to each heater must be balanced for

optimum operation. To meet recommended ow rates, be sure all installed pipes are installed in accordance with local and state codes or, in the absence of local codes, with all applicable codes and industry plumbing standards. To allow for proper operation and service clearance, maintain spacing to adjacent heaters. Heaters installed too close to one another may encounter operational issues associated with exhaust and/or condensation.

Page 21

WARM WATER OUTLET

COLD WATER INLET

COLD WATER FROM POOL

WARM WATER TO POOL

1. Set Manual By-Pass Valve.

2. Remove Handle.

Section 2: Installation Instructions

VALVES

When any equipment is located below the surface of the pool or spa, valves should be placed in the circulation piping system to isolate the equipment from the pool or spa. Check valves are recommended to prevent back-siphoning. Back-

siphoning is most likely to occur when the pump stops, creating a pressure-suction dierential. Do NOT sanitize the

pool by putting chlorine tablets or sticks into the skimmer(s). When the pump is o, this will cause a high concentration of chlorine to enter the heater, which could cause corrosion damage to the heat exchanger.

CAUTION

Exercise care when installing chemical feeders so as to not allow back siphoning of chemical into the heater, ﬁlters or pump. When chemical feeders are installed in the circulation of the piping system, make sure the feeder outlet line is down stream of the heater, and is equipped with a positive seal noncorrosive Check Valve, (P/N R172288), between the feeder and heater.

MANUAL BY-PASS

Where the water ow rate exceeds the maximum 120 GPM, a manual bypass should be installed. After installing the valve, adjust the valve to bring the ow rate within the acceptable range. Then remove the valve handle or lock it in place to avoid tampering. See Figure 16.

Table 1: Heater Water Pressure.

ETi®

400

(*) Compare located inside the heater (see page 16), and the water inlet temperature displayed on the Control Board LCD.

BELOW POOL INSTALLATION

GPM (min. / max) Max. T (°F) / Min T (°F)

40 / 120 35 / 25*

T by observing the Temperature Pressure gauges

Figure 16.

If the heater is below water level, the pressure switch must be adjusted. This adjustment must be done by a qualied service technician. See following CAUTION before installation.

CAUTION

BELOW OR ABOVE POOL INSTALLATION

The water pressure switch is set in the factory at 3.00 PSI (± 0.75 PSI). This setting is for a heater installed at pool level. If the water pressure switch is more than 1 ft (30 cm) below or above the pool level, the water pressure switch must be adjusted by a qualiﬁed service technician. Figure 4 on page 14.

FLOW SWITCH

If the water pressure switch is installed more than 3 ft (0.9 m) above the pool or more than 3 ft (0.9 m) below the pool level, you will be beyond the limits of the pressure switch and a ﬂow switch must be installed. Locate and install the ﬂow switch externally on the outlet piping from the heater, as close as possible to the heater. Connect the ﬂow switch wires in place of the water pressure switch wires.

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Page 22

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Maximum Equivalent Pipe Length (ft)

Natural Gas 1000

BTU/FT

0.60 Specific Gravity at 0.5 in. WC Pressure Drop

Propane Gas 2500

BTU/FT

1.50 Specific Gravity at 0.5 in. WC Pressure Drop Input 3/4” 1” 1-1/4” 1-1/2”

Model (KBTU) N P N

ETi 400

399.0 *

20 20 60 90 150 200 450

™

Section 2: Installation Instructions

GAS CONNECTIONS

GAS LINE INSTALLATIONS

Before installing the gas line, be sure to check which gas the heater has been designed to burn. This is important because dierent types of gas require dierent gas pipe sizes. The rating plate on the heater will indicate which gas the heater is designed to burn. The Table 2 below, show which size pipe is required for the distance from the gas meter to the heater. The table description is for natural gas at a specic gravity of 0.60, and propane gas at a specic gravity of 1.50.

When sizing gas lines, calculate three (3) additional feet of straight pipe for every elbow used. When installing the gas line, avoid getting dirt, grease or other foreign material in the pipe as this may cause damage to the gas valve, which may result in heater failure.

The gas meter should be checked to make sure that it will supply enough gas to the heater and any other appliances that may be used on the same meter. The gas line from the meter will usually be of a larger size than the gas valve supplied with the heater. Therefore a reduction of the connecting gas pipe will be necessary. Make this reduction as close to the heater as possible.

The heater requires a gas supply of not less than 4 in (10.2 cm) wc, and not more than 10.5 in (27 cm) wc for natural gas, and not more than 14 in (36 cm) wc for propane gas. Gas supply pressures outside of this range may result in improper burner operation. A minimum owing or dynamic inlet pressure (while the heater is running) of 4 in (10.2 cm) wc is required to maintain input rating with no more than a 2 in pressure drop between static and dynamic. The gas supply must

be installed in accordance with the National Fuel Gas Code, ANSIZ223.1, or standard CSA B149.1, Natural Gas and Propane Installation Codes, as applicable and all applicable local codes. Install a manual shut-o valve and a sediment

trap and union located outside the heater panels, see Figure 16. Do not use a restrictive gas cock. The following minimum gas pipe sizes are recommended for natural gas supply piping, see Table 2 on below. For low pressure LP gas, pipe size may be reduced by 1/4-in, with a minimum pipe size of 1/2-in. Check for compliance with local codes.

The heater and any other gas appliances must be disconnected from the gas supply piping system during any pressure testing on that system, (greater than ½ PSI). The heater and its gas connection must be leak tested before placing the heater in operation. Do not use ame to test the gas line. Use soapy water or another nonammable method.

A manual main shut-off valve must be installed externally to the heater.

DO NOT INSTALL THE GAS LINE UNION INSIDE THE HEATER CABINET. THIS WILL VOID YOUR WARRANTY.

GAS PIPE SIZING

STAGE TWO LOW PRESSURE GAS PIPE SIZING

NOTE

WARNING

Table 2: Note (*) A 3/4” gas line can be used for up to 2 ft (61 cm) maximum length from the gas valve in addition to the sediment trap.

Page 23

Section 2: Installation Instructions

GAS PRESSURE TESTING

Before operating the heater, the heater and its gas connections must be leak tested. Do NOT use an open ame to test for leaks. Test all gas connections for leaks with soapy water or another non-ammable method.

The heater and its individual shut-o valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). The heater must be isolated from the gas supply system by closing its individual manual shut-o valve during any pressure testing of the gas supply at test pressures equal to or less than 1/2 psig (3.5 kPa).

(See page 24 for Checking Gas Pressure Through Control Valve)

Caution: Dissipate test pressure in the gas supply line before reconnecting the heater and its manual

shut o valve to gas supply line. Failure to follow this procedure may damage the gas valve. Over pressurized gas valves are not covered by warranty. The heater and its gas connections shall be leak tested before placing the appliance in operation. Use soapy water for leak test. Do not use open ame.

Note: do not use threaded seal tape on gas line pipe thread. A pipe compound rated for use with natural

and propane gases is recommended. Apply sparingly only on male pipe ends, leaving the two end threads bare.

Special safety and precautions for LP gas: If proper ventilation is not provided gas can collect or pool

in enclosed areas, because LP gas is heavier than air. Pentair does not recommend installing the heater in an enclosed areas, such as a ground pit. If the heater is required to be installed in an enclosed area, be sure proper ventilation for LP gas are met and locate the heater a safe distance from LP gas cylinders and lling equipment. Before installation, 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 specic installation restrictions in your location.

CHECKING GAS PRESSURE THROUGH GAS CONTROL VALVE

WARNING

Risk of explosion if a unit burning propane gas is installed in a pit or other low spot. Propane is heavier than air. Do not install the heater using propane in pits or other locations where gas might collect. Consult your local building code ofﬁcials to determine installation requirements and speciﬁc installation restrictions of the heater relative to propane storage tanks and ﬁlling equipment. Installation must meet the requirements for the Standard for the Storage and Handling of Liqueﬁed Petroleum Gases, CAN/CSA B149.2 (latest edition) or ANSI/NFPA 58 (latest edition). Consult local codes and ﬁre protection authorities about speciﬁc installation restrictions.

CHECKING THE GAS PRESSURE THR OUGH THE COMBINATION GAS CONTR OL VALVE (See Figure

15): Before operating the heater, the heater and its gas connections must be leak tested. Do NOT use an open ame

to test for leaks. Test all gas connections for leaks with soapy water or another non-ammable method.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Page 24

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Manual Shut-off Valve

Sediment Trap

Union

At least 9-in (23 cm)

At least 3-in (8 cm)

1-in (3 cm) Diameter or larger (See

Recommended Pipe Sizes Chart)

18–24-in of 3/4-in Gas line from Valve

Bell Reducer

To Air Flow Switch

To Gas Valve Vent

Vent

Pressure Tap

To High Side of Differential Pressure Gauge

To Low Side of Differential Pressure Gauge

Pressure Tap Inlet

Figure 15.

To Air Flow

Section 2: Installation Instructions

CHECKING GAS PRESSURE THROUGH GAS CONTROL VALVE (CONTINUED)

This appliance is equipped with an unconventional gas control valve that is factory set with a manifold pressure of –.2” (–0.5cm) wc. Installation or service must be performed by a qualied installer, service agency, or the gas supplier. If this control valve is replaced, it must be replaced with an identical control.

The combination gas valve incorporates dual shut-o valves and a negative-pressure regulator. For proper operation, the regulated pressure at the outlet manifold of the valve must be –0.2” (–0.5cm) wc below the reference pressure at the blower mixer inlet, and the gas valve ‘VENT’ tap must be connected to the end cap air orice as shown in Figure 17.

Do not attempt to adjust the gas input by adjusting the regulator setting. The correct gas regulator setting is required to maintain proper combustion and must NOT be altered.

Switch

To Gas Valve Vent

Figure 17.

IMPORTANT: IF THERE ARE ANY IGNITION ISSUES AFTER THE NATURAL GAS TO PROPANE (LPG) CONVERSION, CALL PENTAIR TECHNICAL SUPPORT AT 800.831.7133.

SEDIMENT TRAPS

Install a sediment trap and union located outside the heater panels in accordance with National code requirements. Do not use a restrictive gas cock. The sediment trap shall be either a tee tting with a capped nipple in the bottom outlet which can be removed for cleaning, as shown in Figure 18, or an other device recognized as an eective sediment trap. All gas piping should be tested after

installation in accordance with local codes.

Figure 18.

Page 25

OUTDOOR INSTALLATION

Section 2: Installation Instructions

OUTDOOR HEATER INSTALLATION

(U.S. and Canada)

The heater is designed and certied for outdoor installation using the 2 ft (61 cm) long vent pipe stack.

WARNING

Risk of explosion if a unit burning propane gas is installed in a pit or other low spot. Propane is heavier than air. Do not install the heater using propane in pits or other locations where gas might collect. Consult your local building code ofﬁcials to determine installation requirements and speciﬁc installation restrictions of the heater relative to propane storage tanks and ﬁlling equipment. Installation must meet the requirements for the Standard for the Storage and Handling of Liquid Petroleum Gases, ANSI/NFPA 58 (latest edition) in the U.S., or CAN/CSA B149.2 (latest edition) in Canada. Consult local codes and ﬁre protection authorities about speciﬁc installation restrictions.

The heater is designed for outdoor operation in non-freezing conditions only. During freezing conditions the condensate

drain line and trap may freeze, causing the heater to shut down due to a blocked condensate drain. Also, the heater condensate system components may be damaged by the ice forming on the condensate drain line and trap. If the heater is installed in freezing climates for seasonal use, winterize the heater to avoid freeze damage. See Winterizing Instructions on page 56. Locate the heater on a level surface in an open area that is protected from drainage or run-o. Install the heater in an area where leaves or other debris will not collect on or around the heater. To avoid damage to the electronic components in the heater, take care to prevent prolonged exposure to driving sources of water (such as lawn sprinklers, heavy roof runo, hoses, etc.). Avoid operation in persistent, extreme, moist or salty environments.

CAUTION! In an outdoor installation it is important to ensure water is diverted from overhanging

eaves with a proper gutter/drainage system. CAUTION! If the heater is installed directly under a roof overhang, install a 90° street elbow onto the vent terminal. Install a 2 ft (61 cm) pipe section onto the elbow. Install the vent cap onto the end of the pipe. Direct the vent cap away from the house or building, See Figure 19 below.

VENTING GUIDELINES

SIDE VIEW

6 in

Exhaust Grill (Vent)

Building

Force

Air Inlet

From building wall

Vent Termination:

Must be at least 3 ft. above any forced air inlet located within a 10 ft. radius.

From window or door

Property Line

Must be located 6 in. away from the building wall and the following distances away from any building wall openings, included but not limited to vented eaves, doors, windows, gravity air inlet:

4 ft. below, 4 ft. horizontally

WARNING

Roof overhang

Building

Check local building codes

for setback requirements.

ROOF OVERHANG

2 ft (61 cm) Pipe

90° Elbow

6 in

Vent Cap

Risk of explosion if a unit burning propane gas is installed in a pit or other low spot. Propane

is heavier than air. Do not install the heater using propane in pits or other locations where gas might collect. Consult your local building code ofﬁcials to determine installation requirements and speciﬁc installation restrictions of the heater relative to propane storage tanks and filling equipment. Installation must meet the requirements for the Standard for the Storage and Handling of Liqueﬁed Petroleum Gases, CAN/CSA B149.2 (latest edition) or ANSI/NFPA 58 (latest edition). Consult local codes and ﬁre protection authorities about speciﬁc installation restrictions.

Figure 19.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

3-1/2 in thick (min) concrete pad

HEATER BASE FOR USE ON NON-COMBUSTIBLE OR COMBUSTIBLE SURFACE

6 in (min) edge distance

Bolt-down bracket (x4) supplied with heater

1/4 in x 2-1/4 in SS concrete screw and SS fender washer

For hurricane mounting bolts and clamps, purchase Bolt Down Kit P/N 476004

Section 2: Installation Instructions

OUTDOOR HEATER INSTALLATION (CONTINUED)

The following information is for heaters located outdoors, using a 2 ft (61 cm) long vent pipe stack.

WARNING

CARBON MONOXIDE GAS IS DEADLY – 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.

WARNING

Locate the heater in an open, unroofed area and on a level surface that is protected from drainage or run-o. Install the heater in an area where leaves or other debris will not collect on or around the heater. See Figure 20.

It is recommended that a non-combustible base be a platform under the heater, not less than 100 millimeters (mm)

thick However, the heater is approved to be installed on a combustible surface. To avoid damage to the electronic

components in the heater, take care to prevent prolonged exposure to driving sources of water (such as lawn sprinklers, heavy roof runo, hoses, etc.). Avoid operation in persistent, extreme, moist or salty environments. In extreme weather, shut down the heater and disconnect the power to it until the weather has moderated. In areas subject to hurricanes or very high winds, purchase the Bolt Down Bracket Kit, P/N 476004, see Figure 21.

Note 1: DO NOT locate the heater where it is exposed to a prevailing wind. Note 2: Be sure the heater is level.

Figure 20.

Figure 21.

Page 27

Section 2: Installation Instructions

3 ft (1 m) or more

OUTDOOR HEATER INSTALLATION (CONTINUED)

HEATER CLEARANCES – OUTDOOR

IMPORTANT!

• In an outdoor installation it is important to ensure water is diverted from overhanging eaves with a proper gutter/drainage system. CAUTION! If the heater is installed directly under a roof overhang, install a 90° street elbow onto the vent terminal. Install a 2 ft (61 cm) pipe section onto the elbow. Install the vent cap onto the end of the pipe. Direct the vent cap away from the house or building, (see page 25).

• The heater must be set on a level foundation for proper drainage.

• This unit shall not be operated outdoors at temperatures below 32o F (0o C).

If the heater is located under a roof or deck overhang, there must be at least three (3) feet (1 m) of clearance between the bottom of the overhang and the top of the heater exhaust vent, see Figure 22. If the heater is under a roof or deck overhang, the space around the heater must be open on three sides. DO NOT install the heater under any deck.

For minimum exhaust vent clearances for building openings, see Figure 27 on page 34.

In Canada, the heater must be installed with the top of the vent at least 10 ft (3 m) below, or to either side of, any opening into a building.

Orient the heater for convenient access to the water connections and the gas and electrical connections.

Note: Check local building codes for installing the heater from any property line set back requirements (see Figure 19 on page 25 for installation illustration).

If installing the heater next to or near an air conditioning unit, heat pump or another gas pool heater, allow a minimum of 36 in. (91.4 cm) between the unit and the heater.

Note: (*) See Table 4 (page 30) Category IV Requirements

CAUTION

CAUTION! A Propane (LPG) ﬁred heater must not be installed in a garage in Massachusetts, by order of the Massachusetts State Fire Marshal. For more information, call the Massachusetts State Fire Marshal’s ofﬁce.

Figure 22.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

6 in

(15 cm)

6 in

(15 cm)

6 in

(15 cm)

6 in

(15 cm)

Operator control panel

Inlet / outlet plumbing

Air intake cover

Section 2: Installation Instructions

INDOOR VENTING — General Requirements

The heater must be installed as a Category IV appliance.

Vented Appliance (Category IV) – Vertical or Horizontal

An appliance that operates with a positive vent static pressure and with a vent gas temperature that allows excessive

condensate production in the vent, see Figure 24 (page 30) and Figure 27, page 34.

If you are considering connecting this heater to a pre-existing vent system, make sure that the vent system meets the

appropriate venting requirements as given in this manual on page 34. If not, replace the vent system. DO NOT use a

draft hood with this heater.

The heater operates with a positive vent static pressure and with a vent gas temperature less than 170° F (77° C). The total length of the horizontal run must not exceed the length that is listed in Table 3 on page 29.

HEATER CLEARANCES — General Requirements

INDOOR INSTALLATION OR OUTDOOR SHELTER (US AND CANADA)

The following clearances must be maintained from combustible surfaces:

TOP............................... 6 in (15 cm)

EXHAUST SIDE ...........6 in (15 cm)

HEADER SIDE ............. 6 in (15 cm)

DOOR PANELS (*) ...... 6 in (15 cm)

NOTE: (*) For service access it is advisable to allow for sucient clearance on at least one door panel. The heater is

design certied by CSA International for installation on combustible ooring. For installation on carpeting, the heater must be mounted on a metal or wood panel that extends at least 3 in (10 cm) beyond the base of the heater. If the heater is installed in a closet or alcove, the entire oor shall be covered by the panel. For an outdoor shelter installation, the exhaust must discharge into a vent pipe. Orient the heater so that the vent pipe does not interfere with adjustment of the operator control panel.

180° Control Panel and Plumbing Orientation: The control panel board can be installed 180 degrees on either side of the heater, allowing for left or right side plumbing orientation for easy access.

DIRECT AIR INTAKE COVER

The heater is supplied from the factory with a cover on the top panel for outdoor installation (see Figure 23).

Figure 23.

Remove the outside air intake cover for outdoor shelter installation or Indoor Installation.

Page 29

Section 2: Installation Instructions

Minimum Net Free Open Area for Each Opening*

(Square Inches / Square Centimeters)

Model

All Air From Inside BuildingAll Air From Outside Building

Combustion Vent Combustion Ve nt

ETi 400

400 in

2580 cm

400 in

2580 cm

100 in

645 cm

100 in

645 cm

COMBUSTION AIR SUPPLY

For indoor installation, the heater location must provide sucient air supply for proper combustion and ventilation of the surrounding area, see Table 3 below.

The minimum requirements for the air supply specify that the room in which a heater is installed should be provided with two permanent air supply openings; one within 12 inches (30 cm) of the ceiling, the other within 12 in (30 cm) of the oor for combustion air, in accordance with the latest edition of ANSI Z223.1, or the National Fuel Gas code, the CSA B149.1, Natural Gas and Propane Installation Codes, as applicable, and any local codes that may apply. These openings shall directly, or through duct, connect to outdoor air.

Air Supply Requirements Guide for the ETi® 400 Heater

NOTE *: Vent must be at least 2.4 m (8 ft) away from nearest vertical surface. Vents extending 1.5 m (5 ft) or more above the roof must be braced or guyed. Consult your local code ofﬁcials for detailed information.

Table 3. Note (*) Area indicated is for one of two openings; one at ﬂoor level and one at the ceiling.

CAUTION

Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.

Note: For indoor installations where combustion air might be insucient, see Direct Air Intake Duct with 4 in PVC Pipe (Indoor Installation) on page 30 and 31.

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Page 30

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

vided with heater

Section 2: Installation Instructions

Direct Air Intake Duct with 4-inch or 6-inch PVC Pipe (Indoor Installation)

For indoor heater installations, the heater is tested for a direct air intake duct using 4 in or 6 in PVC pipe. If outside air is drawn through 4 in or 6 in PVC duct directly into the heater, vent pipe can be installed in accordance with the following requirements, see Table 4 below.

The air intake opening MUST be installed at least 1 ft. above the roof line or normal snow levels for free air ow. The

Category IV exhaust vent termination cap must have at least 3 ft. (1 m) minimum vertical clearance from air intake duct,

see Figure 24.

Combustion Air Intake (Vertical or Horizontal) Duct Requirements*

* Combustion Air Intake (Vertical or Horizontal)

Maximum length in Feet (m)

No. of 90° Elbows 4-in (10 cm) pipe 6-in (15 cm) pipe

0 120 ft. (36.6 m) 300 ft. (91.4 m) 1 108 ft. (33 m) 288 ft. (87.7 m) 2 96 ft. (29.3 m) 276 ft. (84.1 m) 3 84 ft. (26 m) 264 ft. (80.4 m) 4 72 ft. (22 m) 252 ft. (76.8 m)

Table 4.

Flue Exhaust Vent Cap provided with heater

CAUTION

Do NOT combine exhaust vent pipes to a common exhaust vent in multiple unit installations. Run separate vent pipes.

4” or 6” PVC Pipe

pro

4” or 6” PVC Pipe

Direct Air Intake kit

Flue Exhaust Side Wall Vent Cap provided with heater

Figure 24.

(P/N 475971)

Page 31

Section 2: Installation Instructions

DIRECT AIR INTAKE KIT (P/N 475971) INSTALLATION

IMPORTANT: For indoor heater installations with Direct Air Intake duct using 4 in PVC duct it is required to order and install the Direct Air Intake Kit (P/N 475971).

To install the Direct Air Intake Kit (see Figure 25), the steps are as follows:

1. Remove the side panel from the heater to access the Vent Terminal (see illustration below). Using a at-blade screwdriver, insert press and turn the screwdriver to unlock the panel.

2. Remove the Air Intake Vent cover from the top of the heater.

3. Insert the spigot part of the street wye up through the air intake hole in the top panel.

4. Insert the 45° elbow into the 3 in pipe section of the assembly that has the street wye.

5. Adjust the 45° elbow to align each 3 in pipe section with the air orice.

6. Push the air intake assembly into the air orices. Note: Be sure the top part of the elbow is concentric to the air intake hole in the top panel (see Figure 26).

7. Place the 3 x 4 in reducer to the street wye plate of the elbow and secure it with the 3 sheet metal retaining screws.

3 in x 4 in

Remove

air intake

cover

air Intake reducer

Step 4

Street Wye

Side panel latch lock

Figure 25.

Step 1 & 2

Street Elbow

Upper Blower Inlet Air Oriﬁce

Step 3

Lower Blower Inlet Air Oriﬁce

Air Oriﬁces

Figure 26.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

COMBUSTION AIR SUPPLY (CONTINUED)

NOTE

Each 90-degree elbow reduces the maximum horizontal PVC air intake duct run by 12 feet and each 45-degree elbow in the PVC air intake duct run reduces the maximum run by 6 feet. See the Table 6 on page 33 for the maximum lengths using 90-degree elbows.

CAUTION

Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.

Corrosive Vapors and Possible Causes

Area Likely Contaminants

Chlorinated swimming pools and spas

Pool or spa cleaning chemicals. Acids, such as hydrochloric or muriatic acid.

New construction and remodeling areas

Beauty parlors

Refrigeration plants or various industrial ﬁnishing and processing plants

Dry cleaning and laundry areas

Table 5.

Glues and cements, construction adhesives, paints, varnishes, and paint and varnish strippers. Waxes and cleaners containing calcium or sodium chloride.

Permanent wave solutions, bleaches, aerosol cans containing chlorocarbons or ﬂuorocarbons.

Refrigerants, acids, glues and cements, construction adhesives.

Bleaches, detergents, or laundry soaps containing chlorine. Waxes and cleaners containing chlorine, calcium or sodium chloride.

Page 33

Section 2: Installation Instructions

HORIZONTAL OR VERTICAL VENTING (CATEGORY IV) - POSITIVE PRESSURE

(See Figure 28, page 35 and Figure 29, page 36)

Vent the heater either horizontally or vertically using the 4 in Vent Adapter that is provided with the heater. Install the vent pipe in accordance with local codes and the provisions of the National Fuel Gas Code, ANSI Z223.1 (U.S.), or the standards CSA B149.1, Natural Gas and Propane Installation Codes (Canada), and the vent manufacturer’s instructions. Do not use a draft hood with this heater. Install the vent according to the vent manufacturer’s

detailed instructions. Note: Maintain clearance between the vent pipe and combustible surfaces according to the

vent manufacturer’s instructions and code requirements. Do not place any insulating materials around the vent

or inside the required clear air space surrounding the vent. See Table 6 for maximum permissible vent lengths.

NOTE Each 90° elbow reduces the maximum horizontal vent run by 12 ft and each 45-degree elbow in the vent run reduces the maximum vent run by 6 ft. See the Table 6 below for the maximum vent lengths using 90° elbows.

The ETi® 400 heater is a Category IV appliance

The ETi 400 heater requires a 4 in special gas approved Category IV vent pipe and is a forced-draft pool and

spa heater which uses positive pressure to push ue gases through the vent pipe to the outside. Flue gases under

positive pressure may escape into the dwelling with any cracks or loose joints in the vent pipe, or improper

vent installation. The vent pipe must be of a sealed-seam construction, such as those listed for use with Category

IV Appliances. Vent pipe construction will be of UL 1738 approved non-corrosive material, such as non-metalic

PVC schedule 40 per ASTM D2665, CPVC schedule F441 or stainless steel such as AL 29-4C per UL 1738 in USA. In Canada must comply with ULC-5636 code requirements. The 4-in exhaust socket is CPVC. A condensate trap is required.

Note: To solvent weld the PVC vent pipe to the CPVC exhaust socket use an approved industry standard primer and cement solvent specically intended and marketed for PVC/CPVC joints, consult the adhesive manufacturer for details.

The use of Approved thimbles, roof jacks and/or side vent terminals are required; and the proper clearances to

combustible materials must be maintained in accordance with type of vent pipe employed—in the absence of a clearance recommendation by the vent pipe manufacturer, the requirements of the Uniform Mechanical Code should be met. The ventilation air requirements for the heater are shown on page 34 and 36. It is recommended that use of a condensate trap in the vent run close to the heater may be necessary in certain installations such as cold climates. Horizontal vents 4 in (25.4 mm) or less in length do not require a condensate tee. The heater is suitable for through-the-wall venting.

(*) Special Gas Vent (Vertical or Horizontal)

No. of 90° Elbows 4-in (10 cm) pipe 6-in (15 cm) pipe

Table 6.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Maximum length in Feet (m)

0 120 ft. (36.6 m) 300 ft. (91.4 m) 1 108 ft. (33 m) 288 ft. (87.7 m) 2 96 ft. (29.3 m) 276 ft. (84.1 m) 3 84 ft. (26 m) 264 ft. (80.4 m) 4 72 ft. (22 m) 252 ft. (76.8 m)

(*) Minimum vent length is 1 ft (.34M), or in accordance

with vent manufacturer’s instruction, and local and national codes. Horizontal vents 3 ft (1M) or less in length do not require a condensate tee, but must slope down toward the heater at 1/4 in to the foot (2 cm / m) to allow condensate to drain through the neutralizer cartridge.

Page 34

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

1' Min.

4' Min.

3' Minimum clearance if horizontal distance to exhaust opening is less than 10 feet.

Forced Air Inlet

Vent Termination

1' Minimum above snow or finished grade (whichever is higher)

At least 7' above grade adjacent to public walkways

Vent Termination

Vent Terminatio

Gas Meter

Max. 12" Min. 3"

Section 2: Installation Instructions

DIRECT VENT REQUIREMENTS

1. Install vent pipe so that it can expand and contract freely as the temperature changes. Support the vent pipe

according to applicable codes and vent manufacturer’s instructions. Pipe support must allow the vent pipe free movement out and back, from side to side, or up and down as necessary, without putting a strain on the heater or vent body. It is recommended to slope the horizontal pipe runs up from the heater at least 1/4" per

foot (2 cm/M). Install Approved condensate drains at low points where condensate might collect. Plumb

condensate drains to a drain through hard piping or high-temperature tubing such as silicone rubber or EPDM rubber – do not use vinyl or other low temperature tubing. Follow drain manufacturer’s installation instructions.

2. Use an Approved restop for oor and ceiling penetrations. Use an Approved thimble for wall penetrations. Use an Approved roof ashing, roof jack, or roof thimble for all roof penetrations. Do not ll the space

around the vent (that is, the clear air space in the thimble or restop) with insulation. The

be located so that the vent is vertical.

3. V ent T ermination: Vertical (See Figure 27 below and Figure 29 on page 36), for height of vent termination above the roof. Use an Approved vent terminal specied by local and national codes and your manufacturer’s

instructions. A roof termination must be vertical. In Canada, the Vent Cap location shall have a minimum clearance of 4 feet (1.2M) horizontally from electric meters, gas meters, regulators, and relief openings.

roof opening must

4. Make sure entire installation is sealed according to approved standards.

WARNING

Risk of carbon monoxide poisoning if adapter is improperly attached. Mechanical connections (such as screws) can cause cracking and leaks in the adapter. Do NOT drill holes or use screws to connect the appliance adapter to the heater vent body. Attach with manufacturer’s speciﬁed adhesive.

Figure 27.

Page 35

3" (7.6 cm) Min., 12" (30.5 cm) Max. Clearance

Condensate drain w/Trap

Condensate Tee

Support weight of pipe

Listed Terminal

Gas Vent requires Appliance Adapter

Vent Body

Slope at least 1/4" per foot (2 cm per Meter) down towards condensate drain

(Optional)

Section 2: Installation Instructions

5. Vent Termination - Horizontal

The terminal must be located (U.S. – See Figure 27 on page 34):

• at least 3" and at most 12" out from the wall (see Figure 29 on page 36), following the vent manufacturer’s

instructions

• at least 12" above nished grade or the normally expected snow accumulation level, whichever is higher

• at least 4 feet below or horizontally from, or 1 foot above, any doors or windows or gravity air inlet to a building

• at least 3 feet above any forced air inlet located within 10 ft.

• at least 4 feet horizontally from electric meters, gas meters, regulators and relief equipment

• at least 7 feet above grade adjacent to walkways or similar trac areas

The terminal must be located (Canada – See Figure 27 on page 34):

• at least 10 feet (3.3M) from any opening into a building

• at least 12" (.3M) above nished grade or the normally expected snow accumulation level, whichever is

higher

• at least 4 feet (1.2M) horizontally from electric meters, gas meters, regulators and relief equipment

• at least 7 feet (2.1M) above grade adjacent to walkways or similar trac areas

Allow at least three feet (1M) vertical clearance over vent termination when terminating under an overhang.

Avoid corners or alcoves where snow or wind could have an eect. Exhaust may aect shrubbery and some building materials. Keep shrubbery away from termination. To prevent staining or deterioration, sealing or shielding exposed surfaces may be required.

WARNING

Fire Hazard. Do not run the heater vent into a common vent with any other appliance. Do not run the Special Gas Vent into, through, or within any active vent such as a factory built or masonry chimney.

Figure 28.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

Direct Vent Indoor Installation (US and Canada) Horizontal Through-the-W all

Termination

The ue direct vent cap MUST be mounted on the exterior of the building. The direct vent cap cannot be installed in a well or below grade. The direct vent cap must be installed at least 1’ (0.3 m) above ground level and above normal snow levels, see Figure 27, page 34. The direct vent cap MUST NOT be installed with any combustion air inlet directly above a direct vent cap. This vertical spacing would allow the ue products from the direct vent cap to be pulled into the combustion air intake installed above.

This type of installation can cause non-warrantable problems with components and poor operation of the heater due to the recirculation of ue products. Multiple direct vent caps should be installed in the same horizontal plane with a 4’ (1.22 m) clearance from the side of one vent cap to the side of the adjacent vent cap(s).

Care must be taken during assembly that all joints are sealed properly and are airtight. The vent must be drained to prevent the potential accumulation of condensate in the vent pipes.

It is recommended that the intake vent (see Figure 29 below) be insulated in colder climates.

Combustion air supplied from outdoors must be free of particulate and chemical contaminants. To avoid a blocked ue

condition, keep the vent cap clear of snow, ice, leaves, debris, etc.

W ARNING

No substitutions of ﬂue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants. Use CPVC schedule 40 per ASTM D2665, CPVC schedule F441 or stainless steel, such as AL 29-4C per UL 1738 in USA. Canada must comply with ULC-S636 code requirements.

Venting: Vent systems for Category IV appliances that terminate through an outside wall of a building and discharge ﬂue

gases perpendicular to the adjacent wall, must be located not less than 10 ft horizontally from an operable opening in the adjacent building. Exception: This does not apply to vent terminals that are 2 ft or more above 25 ft or more below the operable openings. Through the wall v ents for Category IV must not terminate over public walkw a ys or ov er an area where condensate or vapour could create nuisance or hazard or could be detrimental to the operation of regulators, relief v alves , or other equipment.

Note: (*) See Table 4 (page 30) Category IV Requirements

4” or 6” PVC Pipe

provided with heater

4” or 6” PVC Pipe

Direct Air Intake kit

Side

Wall Vent

(4-in PVC)

Figure 29.

(P/N 475971)

Page 37

Leave 6 in. (15 cm) of clear space between heater and combustible surface.

18 in.

Section 2: Installation Instructions

GARAGE OR UTILITY ROOM INSTALLATION

WARNING

Risk of ﬁre and explosion if installed at ﬂoor level in an automotive garage or near gasoline or ﬂammable liquid storage.

Gasoline fumes are heavier than air and will settle to ﬂoor level in closed spaces. Gasoline fumes and spilled gasoline or other volatile liquids (such as some paints and varnishes) will travel across the ﬂoor and can be ignited by a gas appliance.

In any utility room or residential garage installation, install the heater with the base at least 18 inches (.5M) above the oor, see Figure 30. In a garage, install a rail or wall to protect the heater from physical damage by a moving vehicle.

NOTICE: A Propane (LPG) ﬁred heater must not be installed in a garage in Massachusetts, by order of the Massachusetts State Fire Marshal. For more information, call the Massachusetts State Fire Marshal’s ofﬁce.

VENT INSTALLATION – INDOOR

INSTALLATION (U.S. AND CANADA)

FINAL INSTALLATION CHECK

After heater installation, check and verify the following:

• Check that horizontal vent pipe runs slope uniformly at least 1/4” per foot (2 cm per meter) upward from the heater to the vent terminal. No sags, no dips, no high or low spots.

• Check that vent is supported at elbows, tees, and horizontal and vertical runs according to manufacturer’s instructions and code requirements.

• Check that vent supports and wall and ceiling penetrations allow free movements up, down, and sideways without causing any strains on the heater or vent body.

• Check for at least six inch (15 cm) free air clearance between the heater vent pipe and combustible materials.

• There should be at least 30 in of clearance in front of the heater to provide adequate service space and access to the operator control panel, electrical controls and other operating components.

• Check that all joints are completely together and sealed.

• In Florida, building codes require that the heater be anchored to the equipment pad or platform to withstand high wind pressures created during hurricanes. A hold down bracket kit is designed to hold the unit to the equipment pad in high wind conditions. Installation of the anchor clamps are recommended in all installations and are required in Florida, (See Florida Building Code 301.13). For hurricane mounting bolts and clamps, purchase Bolt Down Kit P/N 476004.

Figure 30.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

CONDENSATION MANAGEMENT

The ETi

400 Heater is a condensing appliance. The ue gases will produce condensate while in operation and

must be drained correctly. Note: The condensate pH level is between 3.1 and 4.2, Pentair recommends to

neutralize the condensate to avoid potential damage over time to the drainage system, and to comply with local water authorities where applicable. To neutralize the condensate, use an optional Condensate Neutralizer Kit

P/N 475612 or similar. The condensate drain must be installed so as to prevent accumulation of condensate. When

a condensate pump is not used, the tubing must continuously slope downward toward the drain with no spiraling.

CAUTION! pH levels of 5.0 and below may harm some ﬂoor drains and/or pipes, particularly those that are metal. Ensure that the drain, drainpipe, and anything that will come in contact with the condensate can withstand the acidity. Damage caused by failure to install a neutralizer kit or to adequately treat condensate will not be the manufacturer’s responsibility.

WARNING! DO NOT allow the exhaust ﬂue gases to vent through the neutralizer. All condensate drains MUST have a trap to prevent ﬂue gas leakage. Flue gas leakage can cause personal injury or death from carbon monoxide. Check with local authorities for regulations regarding discharge of condensate to the drain sewer system.

Condensate Maintenance

Annual condensate assembly inspection: Inspect the inside tubing top for any dirt or particles that could collect and clog the condensate neutralizer cartridge. DO NOT route the condensate outside tubing through any area that is exposed to freezing temperatures.

Condensate Neutralizer Cartridge Drain/Tubing Installation (FOR INDOOR OR OUTDOOR HEATER INSTALLATION)

To install the external condensate neutralizer cartridge drain/tubing:

1. Connect the PVC socket adaptors to the neutralizer. DO NOT OVERTIGHTEN.

2. Connect the inside tubing to the inlet of the neutralizer cartridge.

3. Indoor Heater Installation (Figure 31): Mount the neutralizer cartridge on the oor near the side of the heater.

Outdoor Heater Installation (Figure 32): Using the provided brackets, secure the neutralizer cartridge onto the heater base.

4. Connect the outside tubing to the outlet of the neutralizer cartridge. Be sure the tubing is at its highest point at the cartridge outlet.

5. Route the outside tubing to a drain or to a pump. Maintain a pitch of ¼ in per foot downward from the cartridge outlet.

6. Fill the condensate trap with water until ow is established through the neutralizer. Note: Observe the neutralizer

during the heater operation to ensure unrestricted ow.

Inside

tubing to

internal

exhaust

pipe

Figure 31. External Neutralizer Cartridge for indoor heater Installation

Outside tubing

Connect tube to cartridge inlet

Mounting brackets

Optional External Condensate Neutralizer Kit P/N 475612

Out to drain

Figure 32. Internal Neutralizer Cartridge installed on base of heater for outdoor heater Installation

Page 39

Section 2: Installation Instructions

ELECTRICAL CONNECTIONS

Electrical Rating: 60 Hz 120 / 240 Volts AC, single phase.

Enclose the incoming AC power line to the heater, in an appro ved ﬂexible conduit connected directly to the junction box on the inside of the lower right side of the heater (see Figure 11 on page 18). The Line Voltage ﬁeld wiring is 14 gauge, with a circuit capacity of 15 Amps.

The heater is factory wired for 240 VAC. See page 40 for 240 VAC and 120 VA C wiring. Operating amp draw is about 5 Amps at 120VAC and 2.5 Amps at 240VAC. A 15 Amp circuit capacity is required for the inrush current at startup.

CAUTION

This heater is designed to operate at 120 or 240 VAC. It is not recommended to be connected to OR operate on a 208 VAC.

CAUTION

The heater ships from the Factory with the 240V plug installed. Installing the 120V plug and then connecting the heater to 240V line current will immediately damage the transformer, control board, and will void the warranty. If you install the 240V plug and connect the heater to 120 volts line current, the heater will not operate.

If, while there is line voltage connected to the heater, you touch either line voltage terminal with any 24VAC wire that is connected to the control board (including the Fireman’s Switch jumper), you will immediately destroy the control board and void the warranty.

Please read the information under IMPORT ANT! (pa ge 44) and READ ME FIRST! (page 48) before proceeding.

• All wiring must be in accordance with all applicable codes.

• The heater, when installed, must be electrically grounded and bonded in accordance with local codes or, in the absence of local codes, with the National Electrical Code or the Canadian Electrical Code (as applicable).

• Electrical power circuits to the pool heater must follow local codes and National Electrical Code or Canadian Electrical Code (as applicable).

• All wiring between the heater and devices not attached to it, or between separate devices which are installed in the ﬁeld, must be T ype T wire rated for 35°C rise.

• All line voltage wiring shall be enclosed in approved ﬂexible conduit, and shall be securely attached to the ﬁeld wiring box located in the lower right side of the water manifold panel (see Figure 11 on page

18). The conduit or cable connector at the ﬁeld wiring box should contain an insulating bushing or its equivalent to prevent abrasion of the wires as they enter the box.

CAUTION

HEATER BONDING

WARNING

• A bonding lug is provided on the heater located on the upper side of the base by the “Plumbing” side (see page 18). The heater along with the pool system equipment must be bonded together. Using solid copper conductor not smaller then 8 AWG to reduce voltage gradients in the pool area.

• Not properly bonding and grounding the heater increases the risk of electrical shock. Damage to the heat exchanger can occur from electrolysis when the heater is not bonded properly.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

ELECTRICAL CONNECTIONS

(CONTINUED)

120 V AC Wiring

• Connect the BLUE PLUG (120 VAC) into the 12-pin plug located on the electrical panel, see Figure 33).

• Connect the L1 to the BLACK WIRE in the heater.

• Connect the NEUTRAL WIRE to the RED WIRE in the heater.

• Connect the GROUND WIRE to the GREEN WIRE in the heater.

240 V AC Wiring

• Connect the RED PLUG (240 VAC) into the 12-pin plug located on the electrical panel, see Figure 34).

• Connect the L1 to the BLACK WIRE in the heater and the other L2 to the RED WIRE at the heater.

• Connect the GROUND WIRE to the GREEN WIRE in the heater.

Figure 33.

Fireman Switch Board

CAUTION! The 120 VAC (Blue plug) voltage selector is NOT interchangable with the MasterTemp® or StaRite Heater voltage selector (Black plug)

Panel latch lock

Figure 34.

120 V AC

(BLUE)

220 V AC

(RED)

Page 41

Section 2: Installation Instructions

ELECTRICAL CONNECTIONS

(CONTINUED)

REMOTE CONTROL CONNECTIONS

1. NOTE: Switch o power to heater at main circuit breaker panel.

2. Remove the front side door panel, see Figure 33 on page 40.

3. Locate the Fireman Switch jumper wire; remove the wire. See Figure 35 below.

4. Connect the Remote Control Dry Contact wires. See Figure 35 below.

Figure 35.

CONNECTION OF FIREMAN’S SWITCH OR REMOTE CONTACT YELLOW JUMPER WIRE

4. To connect a 2-Wire Control (for IntelliCenter

, IntelliTouch® or EasyTouch® Control System) or

a timer:

- Remove the factory installed jumper from the Fireman’s Switch terminals.

- Connect wires between the Fireman’s Switch terminals on the heater and the relay. Connect wires from the controller or timer to the Fireman’s Switch. Controller, timer or relay should be sized to handle 24 VAC at 0.5 Amp (because it will be completing the 24 VAC control board circuit on the heater as shown in Figure 34 on page 40). DO NOT apply line voltage to the Fireman’s Switch terminals. Use 18 gauge wire with a minimum 3/64-in (1.2 mm) thick insulation rated for a temperature rise of at least 105°C.

- Knock-outs are provided to route the wires through the bottom of the control box and past the junction box.

5. Close front side door panel.

To control heaters that are operated in parallel, connect wiring at same locations on heater as 2-Wire. It is imperative that each control circuit is isolated from the other control circuits, to avoid that current will ow from one heater to

another through the control circuits.

NOTICE: The fuse for the Fireman’s Switch is a 1.25 Amp 1¼ x ¼” fast blow fuse, which is commonly available.

FIREMAN’S SWITCH

TIME CLOCK/FIREMANS SWITCH (See Figure 31 above): A time clock controlling the ﬁlter pump should be a dual switch low-voltage Fireman’s Switch should be set to shut

off the call for heat to the pool heater 15 to 20 minutes before shutting down the pool pump. Always use crimp type connectors when connecting two wires. To operate the heater with a time clock, connect the timer to the ﬁreman’s switch wiring connection, as shown in the illustration on right. The ﬁreman’s switch connection is located at the Yellow jumper wire below the fuse. The ﬁreman’s switch connection must be a dry contact and must not supply power to the heater. Powering the ﬁreman’s switch connection externally may damage the heater, and is not covered by the herater warranty.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 2: Installation Instructions

HEATER CONNECTION WIRING DIAGRAM

Figure 36.

Page 43

HEATER LADDER WIRING DIAGRAM

Section 2: Installation Instructions

Figure 37.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Fault Condition

Initial Error

Code Display

* Error Symbol/Text

(Press and disengage POOL ON and UP arrow at the same time)

Error display will apear for 30

seconds and then previous state

will display.

Note Troubleshooting

SHORTED Stack Flue Sensors (SFS1 or SFS2) means flue temperature is greater than 170 F (77.7 C)

E06

SFS symbol will be displayed

All keypad disabled

(To Reset: Cycle

Power)

OPEN Stack F

lue Sensor (SFS)

E05

(error should

display after 30

sec of firing)

SFS symbol will be displayed

All keypad disabled

except OFF (To

Reset: OFF key)

OPEN Automatic Gas Shut-off Switch (AGS1 and AGS2)--opens when outlet temperature goes above 150 F (65.5 C)

AGS1 or AGS2 symbol will be

displayed along with text “AG1” or

"AG2".

All keypad disabled

(To Reset: Cycle

Power)

Air Flow Switch (AFS1 and AFS2)

AFS symbol will be

displayed along with text “AFS”.

High Limit Switch (HLS)--Opens when outlet temperature goes above 135 F (57.2 C)

HLS Symbol will be displayed along with text “HLS”.

OPEN Water Pressure Switch (PS)

PS symbol will be displayed along with text “PS”.

OPEN Water Temperature Sensor

E01

LED 7 will light up on back of board

SHORTED Water Temperature Sensor or water tempeature greater than 125 F (51.6 C)

126

OPEN Condensate Float Switch

“FS” text will be displayed

Flame Sensor

IGN symbol will be displayed along with text “IGN”

All keypad disabled

(To Reset: Cycle

Power)

Follow diagram on page 50

Follow diagram on page 49

Follow diagram on page 51

Follow diagram on page 47

OPEN Thermal Sensor

 Symbol will be displayed along with text “”.

Follow diagram on page 51

Section 3: Troubleshooting

Initial T roubleshooting

Only qualiﬁed, trained service technicians with appropriate test equipment should service the heater. Remember that all parts of the system affect heater operation. Before starting this troubleshooting procedure, make sure that the pump is running correctly, that there are no blockages in the system, that the v alves are correctly set and that the time clock is correctly set and is running.

CAUTION: Installing the BLUE 120 volt plug in the control box and then connecting the heater to a 240 volt line will destro y the transf ormer, contr ol broad, and ignition control module, and will v oid the warranty. If y ou install the RED 240 volt plug and then connect the heater to a 120 volt line, the heater

READ THE FOLLOWING INFORMATION CAREFULLY

1. Check the line voltage to your heater. This heater will operate on either 120 Volts AC or 240 Volts AC.

2. Remove the covers and check the 12-pin plug in the back of the control box. The plug must match the voltage in the heater circuit.

3. If the 12-pin plug is not plugged into the back of the control box, select the correct plug from the bag in the control box and plug it in. The BLUE plug is for 120 volts, the RED plug is for 240 volts. See Figure 34 on page 40)

Error and Fault Codes

The following table lists the ETi® 400 Heater Error and Fault Codes.

Page 45

Section 3: Troubleshooting

Hazardous voltage. Can shock, burn or kill.

Disconnect power before servicing any components.

Do not jumper

switch terminals to remedy a failed safety switch.

WARNING WARNING

Press POOL button + Up arrow button together. Is there a three (3) alpha numeric fault code displayed on the LCD?

YES

Does Red SERVICE HEATER LED come on

Verify that water temperature setting is above water temperature reading. If it is, and heater either will not fire or no Red LED’s come on, replace Control Board.

YES

Is Green POOL or SPA LED on?

Is Red SERVICE SYSTEM LED on?

Is Red SERVICE HEATER LED on?

Turn off power to heater for about 5 seconds, and turn back on. Make sure temperature setting is above water temperature. Wait one minute.

Start here for directions to specific Troubleshooting Chart

Fire and Explosion hazard.

Press POOL button + Up arrow button together. Is there a three (3) alpha numeric fault code displayed on the LCD?

Go to chart HEATER WILL NOT FIRE -A (Page 46)

Go to chart HEATER WILL NOT FIRE -B (Page 47)

Go to DIAGNOSTIC LEDs (Page 48)

Section 3: Troubleshooting

Troubleshooting Instruction

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Heater Will Not Fire - A

Start Here: from Page 45.

Heater should

fire

on demand

Remove jumper. Check wiring between Transformer and J9 terminals on Control Board and between J9 and Fireman’s Switch on Terminal Board, check fuse, and restore continuity.

Restore

power to heater.

Replace 12 pin plug

Heater should fire on demand for heat.

Replace membrane pad.

Check POWER SUPPLY

wiring connections to the

heater.

YES

Press POOL ON or SPA ON button on Control Panel Does POOL or SPA LED come on?

Check for 24 VAC at

Secondary on Transformer

Check for Line Voltage at Transformer primary pins. White connects to Pin 3 on Transformer, Black to Pin 2, Orange to Pin 1.

Jumper Fireman’s Switch at Terminal Board and Press POOL ON or SPA ON Button on membrane pad.

Leaving jumper in place, check for 24 VAC between Fireman’s Switch terminals and ground.

Jumper pins 6 and 5 on J8 of Control Board. Does SPA LED come on? Jumper pins 6 and 4 on J8 of Control Board. Does POOL LED come on?

Check for voltage on plug. 120VAC pin 2 on Blue plug and GND on Chassis. 240VAC pin2 and pin 11 on Red plug.

Check that correct 12-pin

plug is installed (Blue 120 VAC, Red 240 VAC).

Remove jumper. Check ribbon cable connection between Membrane Pad and J8 on Control Board. Press POOL ON

SPA ON button on Control Panel again. . . Does POOL or SPA LED come on?

Does POOL or SPA LED come on?

If plug is not install: Install correct plug. 240 VAC plug in 120 VAC circuit: Replace with

correct BLUE plug.

120 VAC plug in 240 VAC circuit? Replace with

correct RED plug. Replace Transformer and Control board. See Heater Will Not Fire -B, page 47. Check Fuse and all other 24 V components for damage.

120 VAC: Check Pin 2 to Pin 3

240 VAC: Check Pin 1 to Pin 3

Chcek for 120 or 240 VAC to heater.

YES

for heat.

Check for loose or damaged wires

YES

Replace Transformer

YES

Check White, Black, and Orange wires on Transformer.

YES

Check Firemans’ circuit conections (time clock wiring, external controller relay).

YES

Replace Control Board

Section 3: Troubleshooting

Page 47

Heater Will Not Fire - B

Increase POOL/SPAtemperature setting on Membrane Pad above actual water temperature. Heater should fire on demand for heat. If not, and no other red LED’s light, replace Control Board.

Service pump/filter and

eliminate other flow obstructions.

Heater should fire on call for heat. Re-verify that water flow is above minimum requirement.

If water pressure is outside of adjustment range that will open switch with pump off and close switch with pump on, replace with flow switch. Set above minimum flow requirement.

From page 45: Start

YES

Is Red SERVICE SYSTEM LED on?

Verify that pump is on, filter is not blocked, and the water flow is above the minimum requirement.

Check that water pressure is within the adjustment range of the Pressure Switch (0-5 psig).

Verify that switch wiring is OK and Pressure Switch port is not blocked, and replace water Pressure Switch.

With pump running, adjust Water Pressure Switch to lower pressure until SERVICE SYSTEM LED goes out. Then verify that SERVICE SYSTEMLED goes on with

pump off.

YES

CONTINUE

Temperature rise lower than 30˚F

Section 3: Troubleshooting

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 3: Troubleshooting

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS

IMPORTANT! READ ME FIRST!

IMPORTANT! READ ME FIRST!!

If your heater is correctly connected to 240 Volts AC, the

Ignition Control Module (ICM) will convert the 240VAC to an intermittent pulse to the ignitor. Digital meters don’t read this type of signal well. (An analog meter will give a better reading than a digital meter). If the ICM is bad, your volt-

meter will read either 0 VAC or 240 VAC. If your ICM is good, your meter will read some voltage between 0 and

240 VAC. Exactly what reading you get will depend on the meter, but with a good ICM, the reading won’t be 0 VAC or 240 VAC, but somewhere in between.

Ign is "on"

Verify the connection to the Flame Sensor rod.

Gas flow during ignition and burner fire for less than 7 seconds.

Gas flow during ignition try, but burner does not fire.

YES

Check gas pressure, ok?

YES

Check voltage across spark electrode with ignition spark tester.

YES

Check the distance between the spark electrode rods, and spark electrode and the burners. See illustration (A) on page 55.

Adjust the distance between the Spark Electrodes to 0.110 in - 0.160 in. See illustration (B) on page 54. Also between the Spark Electroides and the Burners 0.6 in - 0.66 in See illustration (B) on page 54.

YES

Adjust the distance between the Flame Sensor rod to Burner to 0.6 in - 0.66 in. See illustration (A) on page 55.

• Increase gas flow into heater.

• Replace gas line with larger line.

• Replace gas regulator.

• Replace meter or all of the above.

Replace Ignition Control Module.

YES

Replace spark electrodes. See illustration (A) on page 55.

Did Blower come on?

YES

Verify that gas supply is open all the way to Gas Valve, and Gas Valve is set at “on” position. Check for 24 VAC to Gas Valve terminals during ignition try. (Voltage appears about 24 seconds after call for heat). SEE NOTE 2.

Continue on next page.

Verify 24 VAC at IND on Control Board

Replace Control Board.

YES

Replace gas valve with identical part.

YES

Replace Fan Control Board.

Page 49

Section 3: Troubleshooting

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS (Continued)

Check for 24 VAC between V1 and GND terminal on ICM. See NOTE 1

YES

Check for 24 VAC between VALVE and GND terminal on Control Board. See NOTE 2.

YES

Check for 24 VAC between GAS VALVE on Control Board See NOTE 2.

Replace Control Board.

NOTE 1: Voltage appears immediately

after call for heat, and may be

on for only about 30 seconds. NOTE 2: Voltage appears about 24

seconds after call for heat, and may be on for only about 7 seconds.

YES

Check for 24 VAC between START and GND terminal on Fan Control Board. See NOTE 1.

Replace Fan Control Board.

Fix wiring between VAL and GND on ICM and Control Board.

Fix wiring between GAS VALVE terminals ond Control Board and gas valve.

YES

Replace Ignition Control Module.

CAUTION

remedy a failed switch.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Do not jumper a safety switch to

NOTE: ES1 is a spare and should be jumpered.

Page 50

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Do not jumper a safety switch to

remedy a failed switch.

NOTE: ES1 is a spare and should be jumpered.

CAUTION

Service pump and filter to restore proper flow. After servicing, verify proper operation of Pressure Switch (PS).

Replace thermistor or Control Board to correct overheating.

Replace High Limit Switch (HLS)or Automatic Gas Shutoff (AGS)

If problem persists, verify proper operation of Internal Bypass Valve and Thermal Governor, and check for Heat Exchanger blockage.

YES

AGS or HLS "on"

Verify that water flow rate is above minimum required for heater.

Verify that inlet water temperature is below 104˚ (40˚ C)

YES

CONTINUE

YES

CONTINUE

Verify that there is no blockage in Blower intake, Heat Exchanger, and exhaust.

Verify correct connection of wiring and that pressure taps to AFS are OK.

Verify that vinyl tubing to AFS and Blower is not misrouted, kinked, disconnected, or punctured.

Replace Air Flow Switch (AFS).

If problem persists, replace Blower.

Replace Blower.

Verify correct connection of wiring between 24 VAC and IND terminals on Ignition Control Module and Control Board, and replace Control Board.

YES

AFS "on"

Does Blower operate?

THERMISTOR "on"

Verify Thermistor wiring and

OK,

replace Thermistor.

Disconnect Blower and check for line voltage between pins 1 and 3 of Blower Connector on ignition try.

Connect correctly and retry. Does Blower start?

Replace Blower. Does Blower start on ignition try?

Replace Ignition Control Module.

Verify that wires BM and F1 are correctly connected at the terminal strip (see Heater Connection Diagram, Page 42).

Disconnect wires F1 and F2 from Ignition Control Module and short them together. Does Blower come on?

Check for 24 VAC between 24 VAC and GND terminals on Ignition Control Module on ignition try. Check that IND wire is correctly connected.

Service pump and filter to restore proper flow.

Verify that wiring is OK and pressure tap is not blocked. Replace-

Pressure Switch

CONTINUE

PS "on"

Verify that water flow rate is above minimum required for heater.

Adjust Water Pressure Switch to close with pump running and open with pump off.

YES

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS

resistance;

Replace PCBA Fix wiring or replace Thermistor.

YES

Is the heater wired to 120 VAC and the voltage selector 240 VAC (Red plug) connected in the electrical panel?

YES

Install the 120 VAC (Blue) voltage selector plug.

Section 3: Troubleshooting

Page 51

Section 3: Troubleshooting

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS

SF1 or SF2 on

Heater starts and runs OK, but temperature of exhaust climbs to 170°F (77°C) in 3-5 minutes.

Heater starts after several tries, exhaust temperature stays below

Heater doesn’t start at all (exhaust stays cold).

Check pressure and volume of fuel supply

Disconnect the sensor and check continuity across its terminals. Resistance should see:

Does sensor check OK?

See Resistance Table on right.

Check continuity in wiring harness between Control Board and Probe.

YES

Continuity OK?

Check the J5 and J8 connectors for corrosion/ looseness on the male pins.

Clean/tighten pins as needed.

Reset power to Heater and retry. Heater should fire.

150°F (65.5°C)

YES

= open circuit

0 = shorted

YES

DONE

YES

NOT OK

Check

Heat Exchanger

Coil for leaks, liming, soot, or low flow.

YES

Heater should fire on call for heat. Re-verify that water flow is above minimum requirement.

Minimum Flow Requirements

Model Flow (gpm)

minimum.

ETi 400

Temperature rise (˚F)

Lower than 30˚F

Check the temperature at the water outlet plumbing from the tridicator and subtract the water inlet temperature on the LED. The difference is the

Temperature Rise (˚F).

Correct problem; Heater should fire.

Correct Fuel Supply, reset Heater and retry. Heater should fire correctly.

Replace Stack Flue Sensor

DONE

Reset power to Heater and retry. Heater should fire.

Repeat checks on fuel supply, Thermal Regulator, check for correct orifices, etc.

YES

Does the Digital Temperature Display show Error Code “E05” or “E06”?

YES

Resistance T able

T (˚C) -

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95

100

Note: (*) +/- 3%

Replace Heater Control Board.

DONE

Reset power to Heater and retry. Heater should fire.

Replace Heater Control Panel.

DONE

Reset power to Heater and retry. Heater should fire.

Rn (Ohm) *

27396 22140 17999 14716 12099 10000

8308 6936 5819 4904 4151 3529 3012 2582 2221 1918 1663 1446 1262 1105

970

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 3: Troubleshooting

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS

FS is on

Check if the condensate hose is clogged with dirt and is not draining properly.

Remove condensate collector and verify float switch can freely move up and down.

Remove dirt and clean float switch.

tf is on

YES

Clean condensate hose and neutralizer cartridge.

Replace condensate collector.

Verify stack flue temperature is lower than 187° F (86° C)

Service heat exchange or call customer support.

YES

Is the Stack Flue temperature over 172° F (78° C)

Replace thermal fuse.

YES

Replace Stack Flue sensor and thermal fuse and service Heat Exchange or call Customer Service.

Page 53

Section 3: Troubleshooting

Burner Troubleshooting

SYMPTOM CAUSE REMEDY

Loud, high-pitched whine Flame is too rich. Verify pressure tap between gas valve

and blower i nlet. See page 16 and verify that the gas

regulator setting is –0.2" (–0.5cm) wc.

Contact a qualified technician or service agency to replace the gas orifice.

Flame is “fluttery.” Flame is too lean. See page 16 and verify that t he gas Exhaust may have acrid regulator setting is –0.2" (–0.5cm) wc. smell or burner may f ail to stay lit.

Burner pulsates or Exhaust vent is too long. Reduce length of exhaust vent and/or surges, especially on

ignition. Combustion appears Flame current is not Check for wet or damaged igniter with

normal, but flame does being sensed. not stay lit.

Contact a qualified technician or service agency to replace the gas orifice.

number of elbows.

low resistance to g round. Replacewith new igniter.

Verify burner flameholder is properly grounded.

Replace

Ignition Control Module.

Heat Exchanger Troubleshooting

SYMPTOM CAUSE REMEDY

Boiling in heat exchanger. Low water flow to heater May be accompanied by

“bumping” sounds.

Heat exchanger plugged. Service

Bypass valve stuck open. Service bypass valve.

Service

chemistry.

pump and or filter. heat exchanger. Correct water

Operator Control Panel Displays RNC Code

SYMPTOM CAUSE REMEDY

Operator control panel LCD displays . the RNC code.

Neutralizer maintenance reminder. .To clear this code, press the OFF button The RNC code is displayed on the

LCD to remind you to do the maintenance on the neutralizer cartridge.

to put the heater in off mode, then press and hold the OFF button for 5 seconds.

Contact a qualified technician or service agency to service the condensate neutralizer cartridge.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 4: Maintenance and Care

Section 4: Maintenance and Care Instructions

MAINTENANCE AND CARE INSTRUCTIONS

WARNING

Risk of ﬁre or explosion from ﬂammable vapors. Do not store gasoline, cleaning ﬂuids, varnishes, paints, or other volatile ﬂammable liquids near heater or in the same room with heater.

The following maintenance is recommended every six months and at the start of every swimming season:

1. Inspect the heater panels and venting system to make sure that there are no obstructions to the ow of ventilating air or burner exhaust. Check that room air intakes are open and clear of obstructions.

2. Keep the area in and around the heater clear and free from combustible materials, gasoline and other ammable vapors and corrosive liquids.

3. Test the operation of the pressure relief valve by lifting the valve lever (if installed).

4. Test for proper operation of the water pressure switch. See WATER PRESSURE SWITCH on page 14 for testing

instructions.

5. For enclosed installations, repeat the Final Installation Check, page 37. Check for evidence of joint leakage. Make sure that joints have not slipped partially or completely apart. Check pipe and ttings for cracks or breaks. The combustion air blower is permanently lubricated, and does not require periodic lubrication.

TITANTOUGH™ HEAT EXCHANGER ASSEMBLIES ANNUAL INSPECTION

The following maintenance is recommended every 12 months and at the start of every swimming season:

1. The upper and lower TitanTough Heat Exchanger assembly must be inspected every 12 months and cleaned. It is recommended to call a qualied service technician to inspect the heat exchangers. See Figure 38.

Inside heat exchanger assembly

must be cleaned every 12 months

Figure 38.

Heat Exchanger Assembly

CAUTION: The gasket ensures that the combustion chamber is sealed. If the gasket appears to be damaged, DO NOT reuse it. The combustion chamber must be replaced with the burner unit. To replace it, call Pentair Customer Support at 800. 831.7133.

Page 55

0.110 - 0.160 in

Spark Electrode

Section 4: Maintenance and Care

BURNER SPARK ELECTRODE AND FLAME SENSOR ROD ANNUAL INSPECTION

The following maintenance is recommended every 12 months and at the start of every swimming season:

• The Thermal Insulation must be checked every 12 months, and if necessary be replaced. Inspect the Thermal Insulation for signs of exterior damage to the device. It is recommended to call a qualied service technician to inspect the Thermal Insulation. See Figure 39 and Figure 40.

Spark Electrode

0.6 in - 0.66 in

Figure 39. (A) Burner Spark Electrode

Flame Sensor

0.2 in - 0.22 in

Figure 40. (B) Flame Sensor Rod

PRESSURE RELIEF VALVE (50 PSI) (FACTORY INSTALLED)

To avoid water damage or scalding from operation of the pressure relief valve (see Figure 41), install a drain pipe in the outlet of the pressure relief valve that will direct water discharging from the valve to a safe place for disposal. Do not install any reducing couplings or valves in the drain pipe. The drain pipe must be installed so as to allow complete drainage from the valve and drain line. The relief valve should be tested at least once a year by lifting the valve lever.

WARNING

Explosion hazard. Any heater installed with restrictive devices in the piping system downstream from the heater, (including check valves, isolation valves, ﬂow nozzles, or therapeutic pool valving), must have a relief valve installed as described above.

Figure 41.

Pressure Relief Valve

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 4: Maintenance and Care

AFTER START-UP

CHECKING W A TER FLOW

WARNING

Fire or ﬂooding hazard. If the heater overheats and the burners fails to shut off, follow the instructions under T o Turn Off Gas to the Appliance, on page 13, and call a qualiﬁed service technician to repair the heater.

After start-up, the outlet water pipe should feel slightly warmer than the inlet pipe. If it feels hot, or if you hear the water in the heater boiling, there may not be enough water ow to the appliance. Make sure that the lter is not plugged. If water temperature remains high but the unit continues to operate, turn o the appliance and call your service technician.

SPRING AND AUTUMN OPERATION

If the pool is only used occasionally, lower the pool thermostat to 68° F (20° C) and leave the heater on. This will keep the pool and the surrounding ground warm enough so that the heater should restore the pool to a comfortable temperature within about one day.

WINTER OPERATION AND WINTERIZATION

Notice: Pentair recommends to use a blower to remove all of the water out of the heater in areas subject to freezing temperatures while the heater is not being used.

WARNING

Explosion hazard. Purging the system with compressed air can cause components to explode, with risk of severe injury or death to anyone nearby. Use only a low pressure (below 5 PSI or 35 kPa), high volume blower when air purging the heater,

CAUTION

• If the heater has been drained for freezing condition, DO NOT TURN ON the heater until the system is circulating water.

• Water trapped in the heat exchanger can result in freeze damage to the exchanger or headers. Freeze damage is speciﬁcally not covered by the warranty.

• When starting the heater for the swimming season with a water temperature below 50° F (10° C), the heater may be used to heat the water; however, make sure that the heater operates continuously until the water temperature reaches the heater’s minimum setting of 68° F (20° C). During cold weather, if there is no danger of freezing, operate the ﬁlter pump continuously even if the heater is not operating. If air temperatures are expected to drop below freezing (32° F/0° C), shut

down the heater and winterize it.

For outdoor heaters in freezing climates, shut the heater down and drain it for winter as follows:

1. Turn o the electrical supply to the heater and pump ay the main circuit breakers.

2. Close main gas control valve and manual gas valve (located outside the heater). See Figure 16 on page 21.

3. Open the main DRAIN COCK located on the bottom of the manifold adapter and drain the heater exchanges, internal CPVC plumbing, and manifold adapter completely.

4. If the heater is below pool water level, be sure to close the isolation valves to prevent from draining the pool. Isolation valves are not required and should not be used on heaters installed above pool water level, except when needed for winterization valves.

5. Remove the two WATER PRESSURE SWITCHES located in the plumbing inlet assembly. See Figure 3, page 14. Plug the water pressure switches ports to prevent insects and dirt from getting into the plumbing inlet assembly

Continue with Step 6 on next page.

Page 57

Section 4: Maintenance and Care

6. Drain the plastic inlet/outlet manifold through the outlet pipe. If the pipe does not drain naturally to the pool, install a drain cock in the outlet pipe to drain the manifold.

7. Use a blower to remove all remaining water in the heater.

8. Cover air inlet grate with a plastic bag to prevent bugs, leaves, etc., from getting into the heater.

NOTICE: Water trapped in the heater can cause freeze damage. Allowing the heater to freeze voids the warranty.

Removal of Condensate Cartridge and Neutralizer Hose-Loop in Freezing Temperatures

If the ETi 400 heater is installed outdoors and must operate in below freezing temperatures (32° F/0° C or below), to

prevent freezing of the condensate line, the condensate neutralizer cartridge and the condensate neutralizer hose-loop located inside the heater must be removed.

First remove the condensate cartridge and store it, then unwrap the hose-loop below the exhaust to prevent any condensation water from being trapped inside the hose and freezing. Run the condensate hose to the outside of the heater sloping downward at all times.

Note: The condensate neutralizer cartridge should be reinstalled on the heater in the Springtime when outdoor temperatures are above freezing point.

RETURN THE HEA TER TO SERVICE

To return the heater to service after winterizing:

1. Connect the INLET and OUTLET unions to the system plumbing, see page 16. Check that they are connected correctly and there are no water leaks.

2. Reinstall the two WATER PRESSURE SWITCHES in the CPVC plumbing inlet assembly. See Figure 16 on page 21.

3. Place the DRAIN PLUG back into the port at the manifold assembly.

4. Before starting the heater, circulate water through the heater for several minutes until all air noises stop. See also BEFORE START-UP (page 12) and CARE AND MAINTENANCE (page 54). See additional notes on page 12.

MAINT AINING POOL TEMPERA TURE

To maintain pool temperature, make sure that the heater switch and valving are reset to pool settings after using the spa.

ENERGY SAVING TIPS

1. Keep the pool or spa covered when not in use. This will reduce heating costs, reduce water evaporation, conserve chemicals and reduce load on the ltering system.

2. Reduce pool thermostat to 78° F (25° C) or lower; reduce spa temperature to 100° F (38° C). This is accepted as being the most healthy temperature for swimming by the American Red Cross.

3. Use a time clock to start the lter pump at 6 a.m. or later. The swimming pool loses less heat after daybreak.

4. For pools used only on weekends, lower the thermostat setting by 10° F to 15° F (5° C to 8° C) during the week to reduce heat loss. A properly sized heater will restore normal temperature within one day.

5. Turn the heater o when the pool will not be used for an extended period.

6. Follow a regular program of preventive maintenance for the heater each new swimming season. Check operation of the heater and its controls.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 4: Maintenance and Care

CHEMICAL BALANCE

POOL AND SPA WATER

Your pool heater was designed specically for your spa or pool and will give you many years of trouble-free service, provided you keep your water chemistry in proper condition.

Water chemistry should follow good swimming pool water chemistry practices. When using a chlorinator, install it down stream from the heater and at a lower level than the heater outlet. Install a corrosion resistant positive seal “Check Valve”, (P/N R172288), between the heater and the chlorinator to prevent concentrated chemicals from back-siphoning into the heater. Back-siphoning is most likely to occur when the pump stops, creating a pressure-suction dierential. Do NOT sanitize the pool by putting chlorine tablets or sticks into the skimmer(s). When the pump is o, this will cause a high concentration of chlorine to enter the heater, which could cause corrosion damage to the heat exchanger.

Three major items that can cause problems with your pool heater are: improper pH, disinfectant residual, and total alkalinity. These items, if not kept properly balanced, can shorten the life of the heater and cause permanent damage.

CAUTION

Heat exchanger damage resulting from chemical imbalance is not covered by the warranty.

WHAT A DISINFECTANT DOES

Two pool guests you do not want are algae and bacteria. To get rid of them and make pool water sanitary for swimming

- as well as to improve the water’s taste, odor and clarity - some sort of disinfectant must be used.

Chlorine and bromine are universally approved by health authorities and are accepted disinfecting agents for bacteria control.

WHAT IS A DISINFECTANT RESIDUAL?

When you add chlorine or bromine to the pool water, a portion of the disinfectant will be consumed in the process of destroying bacteria, algae and other oxidizable materials. The disinfectant remaining is called chlorine residual or bromine residual. You can determine the disinfectant residual of your pool water with a reliable test kit, available from your local pool supply store.

You must maintain a disinfectant residual level adequate enough to assure a continuous kill of bacteria or virus introduced into pool water by swimmers, through the air, from dust, rain or other sources.

Page 59

Section 4: Maintenance and Care

CHEMICAL BALANCE (continued)

It is wise to test pool water regularly. Never allow chlorine residual to drop below 0.6 ppm (parts per million). The minimum level for eective chlorine or bromine residual is 1.4 ppm.

pH - The term pH refers to the acid/alkaline balance of water expressed on a numerical scale from 0 to 14. A test kit for measuring

pH balance of your pool water is available from your local pool supply store; see Table 7 below.

Muriatic Acid has a pH of about 0. Pure water is 7 (neutral). Weak Lye solution have a pH of 13-14.

RULE: 7.4 to 7.6 is a desirable pH range. It is essential to maintain correct pH, see Table 7 below.

If pH becomes too high (over alkaline), it has these effects:

1. Greatly lowers the ability of chlorine to destroy bacteria and algae.

2. Water becomes cloudy.

3. There is more danger of scale formation on the plaster or in the heat exchanger tubing.

4. Filter elements may become blocked.

If pH is too low (over acid) the following conditions may occur:

1. Excessive eye burn or skin irritation.

2. Etching of the plaster.

3. Corrosion of metal xtures in the ltration and recirculation system, which may create brown, blue, green, or sometimes almost black stains on the plaster.

4. If you have a sand and gravel lter, the alum used as a lter aid may dissolve and pass through the lter.

CAUTION: Do not test for pH when the chlorine residual is 3.0 ppm or higher, or bromine residual is

6.0 ppm or higher. See your local pool supply store for help in properly balancing your water chemistry.

RULE: Chemicals that are acid lower pH. Chemicals that are alkaline raise pH.

ALKALINITY High or Low:

Total alkalinity is a measurement of the total amount of alkaline chemicals in the water, and control pH to a great degree. It is not the same as pH which refers merely to the relative alkalinity/acidity balance. Your pool water’s total alkalinity should be 100 - 140 ppm to permit easier pH control. A total alkalinity test is simple to perform with a reliable test kit. You will need to test about once a week and make proper adjustments until alkalinity is in the proper range. Then, test only once every month or so to be sure it is

being maintained. See your local pool dealer for help in properly balancing the water chemistry.

WATER CHEMISTRY PARAMETERS

Disinfectant levels Minimum Ideal Maximum

Free Chlorine, ppm 1.0 2.0-3.0 4.0** Salt, ppm 3000 3400 4500 Combined Chlorine, ppm None None 0.2 Bromine, ppm 2.0 4-6 10.0 Other Sanitizers Levels not established. Consult local health department before use.

Chemical Values

pH 7.2 7.4-7.6 7.8** Total Alkalinity (Buffering), ppm 60 80-100 180 as CaCO3 Salt ppm 2000 3200 5000** Total Dissolved Solids (includes salt) 3000 ppm 5700 (6000 max) 1,500 ppm > TDS at startup* Calcium Hardness, ppm, as CaCO3 150 200-400 500-1,000 Cyanuric Acid Less than 30 ppm

Biological Values

Algae None None None Bacteria None None Refer to Local Code

Table 7.

*Start-up TDS includes source water TDS and any other inorganic salt added at start-up.

NOTE (**): Failure to adhere to the listed water chemistry parameters may result in premature failure of the heat exchanger and will void the warranty.

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ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Item Descrip�on Quan�ty Part Number

1 Fan Control Board 1 475978 2 Membrane pad 1 475984 3 A) 150°F 1 475985 4 Ar preure t 1 475987 5

Wre arne

1 475998

Termal fue

1 475996

7 tak ue enor 2 475601 8 park eletrode 1 476081Z

9 park Eletrode able 1 475982 10 Condeate aembly/oat t 1 475980 11 HX and Cmney gaket 1 475615 12

Heat exanger re

475606

13 Plug 120/240 V 1 475979 14 Trdato 1 475603 15 Ar ore 1 475604 16 Heater gaket kt 1

475973

17 A 1 475971 18 a de panel 1 475608 19 Water manfold panel 1 475609 20 Control board panel 1 475610 21 Lat ay 1 475611 22 Condenate neutralzer kt 1 475612 23 nlet plumbng aembly 1 475613 24 utlet plumbng aembly 1 475614 25 Exaut aembly 1 475617 26 Termnal board 1 420010056 27 Freman' t Fue 1.25 amp) 1 328500099 28 Termtor, ater eno 1 420010053 29 Water preure t 1 420010060 30 Dual voltage tranformer 1 420010107 31 Preure relef valve 1 475618 32 Control over 1 475619 33 Vent ap exaut 1 475620 34 Wate

r bypa ay 1 475621 35 Vent oket 1 475622 36 Heat Exanger 1 475623 37 Burner 1 475624 38 Bloer 1 476000

39 a valve 1 476001 40 3/4" Unon 1 384044097 41 Hg Lmt t 1 420010063 42 Dran plug 1 U178920P 43 Manfold 1 476002 44 ManfoldEnloure Fatener 1 476003

45 Hold don braket k 1 476004

47  1 476040 48  1 475975

51  1 476059

50  1 462023

49  1 475976

52  1 476072

1 461103

1 461104

Section 5: Replacement Parts

ETI® 400 HEATER REPLACEMENT PARTS LIST

 for Heat Exchanger

 for Heat Exchanger

Page 61

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

ETI® 400 HEATER GENERAL REPLACEMENT PARTS

Note: Item 45 not shown.

Heat Exchangers and Blower Assemblies, see page 62.

Fan control board, Terminal board, see page 66.

Manifold Assembly, Inlet and Outlet Plumbing Assembly, see page 64.

Exhaust Assembly, Condensate Float Switch, see page 65.

Condensate Neutralizer Cartridge, see page 65.

Section 5: Replacement Parts

Page 62

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

368

Note: Item 11, 12, 17, 37 not shown.

Section 5: Replacement Parts

ETI® 400 HEATER HEAT EXCHANGER AND BLOWER ASSEMBLIES REPLACEMENT PARTS

Heat Exchangers and Blower Assemblies

Page 63

11 11

Section 5: Replacement Parts

ETI® 400 HEATER HEAT EXCHANGER ASSEMBLY REPLACEMENT PARTS (CONTINUED)

Heat Exchanger Assembly

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Page 64

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Section 5: Replacement Parts

ETI® 400 HEATER MANIFOLD ASSEMBLY - INLET AND OUTLET PLUMBING ASSEMBLY

REPLACEMENT PARTS

Manifold Assembly - Inlet and Outlet Plumbing Assembly

Manifold Assembly

Page 65

Section 5: Replacement Parts

ETI® 400 HEATER CONDENSATE AND EXHAUST ASSEMBLY REPLACEMENT PARTS

Condensate Neutralizer Cartridge (Optional, P/N 475612 sold separately). The cartridge may be mounted to the base of the heater for an outdoor installation.

Manifold side of heater

Condensate Neutralizer Cartridge (Optional, P/N 475612 sold separately). The cartridge may be mounted external to the heater for an indoor installation.

Condensate Neutralizer Cartridge Assembly and Exhaust Assembly.

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Page 66

ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide Rev. E 3/2020

Note: Items 5 and 9 not shown

Section 5: Replacement Parts

ETI® 400 HEATER OPERATOR CONTROL PANEL ASSEMBLY REPLACEMENT PARTS

Fan Control Board and Terminal Board

Page 67

Notes

Rev. E 3/2020 ETi 400 High Efﬁciency Pool and Spa Heater Installation and User’s Guide

Page 68

1620 HAWKINS AVE., SANFORD, NC 27330 • (919) 566-8000 10951 WEST LOS ANGELES AVE., MOORPARK, CA 93021 • (805) 553-5000 www.pentair.com

All indicated Pentair trademarks and logos are property of Pentair Inc. or its global aliates in the U.S.A. and/or other countries. Third party registered and unregistered trademarks and logos are the property of their respective owners

*475349*

P/N 475349 Revision E. 3/2020

Pentair ETi 400 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual