Raypak 266A, 406A, 337A, 407A, 206A User Manual

...

INSTALLATION AND OPERATING

INSTRUCTIONS

GAS-FIRED POOL AND SPA HEATER

CATALOG NO. 6000.59E Effective: 02-01-06 Replaces: 12-16-05 P/N 241236

WARNING: If these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this

or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

• If you cannot reach your gas supplier, call the fire department.

— Installation and service must be performed by a qualified installer, service agency or the

gas supplier.

This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future reference.

Atmospheric Models

206A, 266A, 336A and 406A

Low NOx Models

207A, 267A, 337A and 407A

WATER CHEMISTRY

(Corrosive water voids all warranties)

For your health and the protection of your pool equipment, it is essential that your water be chemically balanced. The following levels must be used as a guide for balanced water.

Recommended Level(s) Fiberglass Pools Fiberglass Spas

Other Pool & Spa

Types

Water Temp. (Deg. F) 68 to 88 89 to 104 68 to 104

pH 7.3 to 7.4 7.3 to 7.4 7.6 to 7.8

Total Alkalinity (PPM) 120 to 150 120 to 150 80 to 120

Calcium Hardness (PPM) 200 to 300 150 to 200 200 to 400

Salt (PPM)

6000 MAXIMUM 6000 MAXIMUM 6000 MAXIMUM

Free Chlorine (PPM)* 2 to 3 2 to 3 2 to 3

Total Dissolved Solids (PPM)

3000 MAXIMUM 3000 MAXIMUM 3000 MAXIMUM

* Free Chlorine MUST NOT EXCEED 5 PPM!

• Occasional chemical shock dosing of the pool or spa water should not damage the heater providing the water is balanced.

• Automatic chemical dosing devices and salt chlorinators are usually more efficient in heated water, unless controlled, they can lead to excessive chlorine level which can damage your heater.

• Further advice should be obtained from your pool or spa builder, accredited pool shop, or chemical supplier for the correct levels for your water.

4 PART ONE

OWNER'S OPERATING INSTRUCTIONS

4 SECTION 1

START-UP PROCEDURES

4 Before Start-Up 5 Lighting Instructions & Shut-Off Procedures -

Manually Lighted Pilots MV

6 Operating Instruction & Shut-Off Procedures -

Automatically Lighted Pilots IID

7 After Start-Up

7 SECTION 2

CAUTION

8 SECTION 3

MAINTENANCE & CARE PROCEDURES

8 Pool & Spa Water Chemistry 8 Automatic Chlorinators & Chemical Feeders 9 Cold Weather Operation 9 Winterizing the Pool & Spa Heater

10 PART TWO

INSTALLATION & SERVICE INSTRUCTIONS

10 SECTION 1

RECEIVING EQUIPMENT

11 SECTION 2

GENERAL SPECIFICATIONS

11 SECTION 3

INSTALLATION INSTRUCTIONS

11 Code Requirements 12 Clearances 12 Outdoor Heater Installation 14 Florida Building Code 2001 15 Indoor Heater Installation 15 Outdoor Stack/Indoor Stack 16 Atmospheric Specifications and Dimensions 17 Low NOx Specifications and Dimensions 18 Combustion and Ventilation Air 18 Vent Piping 19 Gas Supply Connections 20 Gas Pressure Regulator 20 Gas Pressure Adjustment Locations 20 Pipe Sizing For Gas Connections 21 Plumbing For Water Connections 21 Flow Rates 22 Polymer Headers 22 Cast Iron Headers 22 Unitherm Governor Operation 23 Internal Automatic Bypass Valve 23 External Auxiliary Bypass Valve 23 Auxiliary Bypass Valve Adjustment 23 Pressure Relief Valve Installation 24 Heat Exchanger Pressure Drop Tables 25 Heat Exchanger Reversal Procedure 26 Electrical Wiring 26 Millivolt Models 26 Digital Models 27 Transformer Wiring 28 Wiring Diagram - Millivolt (Mechanical Therm.) 29 Wiring Diagram - Digital Models, Atmospheric

30 Wiring Diagram - Digital Models, Low NOx

31 SECTION 4

SERVICING INSTRUCTIONS

31 General Location of Controls 32 Control Panel Removal 32 Control Adjustments - Digital Models 32 Control Adjustments - Millivolt Models 33 Digital Thermostat Controls 33 Thermostat Control Operation 35 Diagnostics 35 Codes 35 Reading a Fault 36 Remote Control Installation and Operation 36 Remote Operation 36 Activating the Remote 37 Remote Control Wiring 37 2-Wire Remote Control 37 3-Wire Remote Control 38 Water Pressure Switch 38 Flame Roll-Out Safety Switch 38 High Limits 38 Pilot Safety 39 Burner Tray Removal (ATM) 39 Gas Valve Removal (ATM) 39 Main Burner and Orifice Removal (ATM) 39 Pilot Removal and Cleaning 39 Heat Exchanger Removal 40 Tube Cleaning Procedure 40 Desooting Procedure 40 Combustion Chamber Removal 40 Immersion Well Replacement 40 Unitherm Governor (U.G.) Replacement 41 Low NOx Pool Heaters 41 Operation 41 Start-Up Procedures 41 Visual Inspection 41 Electrical 41 Flame Roll-Out Safety Switch 42 Burner Tray Removal 42 Gas Valve Removal 42 Main Burner and Orifice Removal 42 Pilot Removal 42 Combustion Blower Removal

43 SECTION 5

TROUBLESHOOTING

44 Electrical - Standing Pilot Millivolt 45 Electrical - Electronic Ignition (IID) 46 Digital Control Logic - Flow Chart

47 SECTION 6

REPLACEMENT PARTS

48 Illustrated Parts List 51 Part Numbers

CONTENTS

PART ONE OWNER'S OPERATING INSTRUCTIONS

FOR YOUR SAFETY - READ BEFORE OPERATING WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY RESULT, CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

SECTION 1 - START-UP PROCEDURES

Your pool/spa heater has been designed for years of safe and reliable pool/spa water heating. It is available with millivolt or electronic ignition. ASME-certified units, typically used in commercial applications, are also available. This manual provides installation, operation, maintenance, and service information for these heaters.

If your heater has been installed correctly, operating the heater is an easy task. The upper front panel of the heater contains the control center that allows you to turn the heater On or Off and adjust the temperature settings for the pool or spa. The temperature range is factory set from 65°F (18°C) to 104°F (40°C). See figure above for location of toggle switch to turn the heater On and Off. Section 4 of this manual contains more details about the use of the controls in the Control Adjustments subsection (page 31).

OFF

Fig. # 9472

BEFORE START-UP

BURNERS

Clean main burners, combustion fan (if equipped) and air louvers of dust, lint and debris. Keep heater area clear and free from combustibles, flammable liquids and chemicals. Do not obstruct the flow of combustion and ventilation air.

WATER

Water must be flowing through the heater during operation. Ensure that system is filled with water and have pump operating.

CAUTION:

Propane gas is heavier than air and will settle on the ground. Since propane can accumulate in

confined areas, extra care should be exercised when lighting propane heaters.

LIGHTING INSTRUCTIONS AND SHUT-OFF PROCEDURES

MILLIVOLT SYSTEM

(MANUALLY LIGHTED PILOT)

A. This appliance has a pilot that must be lit by

hand. When lighting the pilot, follow these instructions exactly.

B. BEFORE LIGHTING, smell all around the

appliance area for gas. Be sure to smell near the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS:

*Do not try to light any appliance. *Do not touch any electric 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 push in or turn the gas

control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been

under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

1. STOP! Read the safety information above.

2. Set the thermostat on the lowest setting.

3. Turn On/Off switch to the "Off" position.

4. Remove heater door panel.

5. Push in gas control knob slightly and turn clockwise to "Off".

NOTE:

Knob cannot be turned from "Pilot" to Off" unless knob is pushed in slightly. Do not force.

6. Wait 5 minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety information above. If you don't smell gas, go to the next step.

7. Locate pilot mounted on the right side panel of the burner tray.

LIGHTING INSTRUCTIONS

8. Turn gas control knob counter-clockwise to "Pilot"

9. Place flame to end of pilot tube. Push in

control knob all the way and hold to light pilot. Continue to hold control knob in for about one minute after the pilot is lighted, release knob and it will pop back up. Pilot should remain lighted. If it goes out, repeat steps 5 through 9. If knob does not pop up when released, stop and immediately call your service technician or gas supplier.

10. Stand to the side of the heater and turn the

gas control knob counter-clockwise

to "On".

11. Replace heater door panel.

12. Turn On/Off switch to the "On" position.

13. Set thermostat to the desired setting.

1. Set the thermostat to the lowest setting.

2. Turn On/Off switch to the "Off" position.

3. Remove heater door panel.

4. Push the gas control knob slightly and turn clockwise to "Off". Do not force.

5. Replace heater door panel.

SHUT-OFF PROCEDURE

Fig.# 9265

Fig.# 9263

HONEYWELL MILLIVOLT GAS VALVE

INVENSYS/ ROBERTSHAW MILLIVOLT GAS VALVE

HONEYWELL PILOT

ROBERTSHAW PILOT

Fig.# 8083.0

Fig.# 8084.1

CAUTION: Propane gas is heavier than air and will settle on the ground. Since propane can accumulate in confined areas, extra care should be exercised when lighting propane heaters.

OPERATING INSTRUCTIONS AND SHUT-OFF PROCEDURES

ELECTRONIC IGNITION SYSTEM

(AUTOMATICALLY LIGHTED PILOT)

A. This appliance is equipped with an ignition

device which automatically lights the pilot. Do not try to light the pilot by hand.

B. BEFORE OPERATING, smell all around the

appliance area for gas. Be sure to smell near the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS:

*Do not try to light any appliance. *Do not touch any electric 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 push in or turn the gas

control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been

under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

1. STOP! Read the safety information above.

2. Set the thermostat to the lowest setting.

3. Turn off all electrical power to the appliance.

4. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand.

5. Remove heater door panel.

6. For Honeywell valve: Turn gas control knob clockwise to "Off".

For Robertshaw valve: Models 266-406: Turn gas control knob clockwise to "Off". Model 206: Push in and move gas control lever counter-clockwise to "Off" position.

7. Wait 5 minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety information above. If you don't smell gas, go to the next step.

8. Turn gas control knob counter-clockwise

to "On". (Honeywell VR 8300 and

Robertshaw 7000)

9. Replace heater door panel.

10. Turn on all electrical power to the appliance.

11. Set thermostat to desired setting.

12. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your service technician or gas supplier.

OPERATING INSTRUCTIONS

1. Set the thermostat at the lowest setting.

2. Turn off all the electrical power to the appliance if service is to be performed.

3. Remove heater door panel.

4. For Honeywell VR 8300 and Robertshaw

7000 gas valve.

Turn gas control knob clockwise

to "Off". Make sure knob rest against stop.

For Robertshaw 7200 gas valve.

Push in and move gas control lever counterclockwise to "Off" position.

5. Replace heater door panel.

SHUT-OFF PROCEDURES

Fig.# 8300

Fig.# 8080.0

Fig.# 8934.1

ROBERTSHAW 7000 GAS VALVE IID

HONEYWELL VR 8300 GAS VALVE IID

GAS

INLET

GAS INLET

ROBERTSHAW 7200 GAS CONTROL LEVER SHOWN IN “OFF” POSITION

AFTER START-UP

Feel the inlet and outlet pipes. Outlet pipe should be only slightly warmer than the inlet. It should not be hot.

VISUAL INSPECTION - ATMOSPHERIC HEATERS

With the heater on, remove the door and make a visual check of the pilot and burner. The flame should be blue with a well-defined pattern.

4" MAX

Fig. # 8205.2

MAIN BURNER FLAME

Fig.# 8964.1

MILLIVOLT PILOT BURNER FLAME

A yellow or "floating" flame indicates restricted air openings or incorrect orifice size. Should this occur, shut the heater off and contact your installer or gas supplier.

WATER PRESSURE SWITCH

A water pressure switch is provided in the heater to shut off the burners in the event that water supply is interrupted. It is very important to verify that the switch electrically opens and shuts off the gas valve when water flow to the heater is interrupted. Otherwise, rapid and severe damage will likely occur to the heater. (The water pressure switch should be checked and adjusted for proper operation by a qualified service person at the time of installation and periodically checked thereafter. Refer to Pressure Switch Adjustment on pg. 37 of this manual).

WARNING:

Should overheating occur or the gas supply fail to shut off, turn off the manual gas control to the appliance.

SECTION 2 - CAUTION

Elevated water temperature can be hazardous. The U.S. Consumer Product Safety Commission has these guidelines:

1. Spa 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.

Pregnant Women Beware!

Soaking in water over 102°F (39°C) can cause fetal damage during the first three months of pregnancy resulting in the birth of a brain-damaged or deformed child. Pregnant women should stick to the 100°F (38°C) maximum rule.

4. Before entering the spa or hot tub, users should check the water temperature with an accurate thermometer; spa or hot tub thermostats may err 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 a physician's advice before using pools or hot tubs.

6. Persons taking medications which induce drowsiness, such as tranquilizers, antihistamines, or anticoagulants, should not use spas or hot tubs.

WARNING:

Operation of the heater without water circulation will cause rapid and severe damage to the heater.

Fig. # 9438

SECTION 3 - MAINTENANCE AND CARE PROCEDURES

To be followed one month after start-up and then semiannually.

1. Inspect top of heater and drafthood for soot, a sticky black substance around finned tubes and "V" baffles, and open flue gas passageways. Any visible soot should be cleaned for proper operation.

2. Clean main burners and pilot burner of dust and lint.

3. Inspect and operate all controls, gas valve and pressure relief valve (if equipped).

4. Make visual check of the burner and pilot flames. Flame pattern on the main burner and pilot is illustrated on page 7. Yellow flame means restriction of the air openings. Lifting or blowing flame indicates high gas pressure. Low flame means low gas pressure. Should the latter occur, shut the heater off and contact your gas supplier or qualified service agency.

5. On indoor heaters, clean room intake openings to ensure adequate flow of combustion and ventilation air.

6. Keep area around heater clear and free from combustible materials, gasoline and other flammable and corrosive vapors and liquids.

IF HEATER WILL NOT FIRE:

If you have no electrical power, it may be that your "circuit breaker" has tripped. Try re-setting it.

If you have electrical power but the heater will not fire check the following or see Troubleshooting section:

1. The time clock must be in the "ON" position.

2. Your pump strainer basket may be full. If so remove debris.

CAUTION:

Soot may be combustible. Wet sooted surfaces completely prior to cleaning. Do not use steel wire brush.

3. Your filter may be dirty. If so, backwash or clean filter. (To tell if your filter is dirty, look to see if the filter pressure will be higher than usual).

4. The pump may have lost its prime and be running dry. Check the pressure on the filter. If there is no pressure; then you are not moving water (or your gauge is broken). Try to get the pump to run at its normal flow rate.

POOL & SPA WATER CHEMISTRY

Chemical imbalance can cause severe damage to your heater and associated equipment. Maintain your water chemistry according to the chart on page 2. If the mineral content and dissolved solids in the water become too high, scale forms inside the heat exchanger tubes, reducing heater efficiency and damaging the heater. If the pH drops below 7.2, this will cause corrosion of the heat exchanger and severely damage the heater. Heat exchanger damage resulting from chemical imbalance is not covered by the warranty.

AUTOMATIC CHLORINATORS AND CHEMICAL FEEDERS

All chemicals must be introduced and completely diluted into the pool or spa water before being circulated through the heater. Do not place sanitizing chemicals in the skimmer. High chemical concentrations will result when the pump is not running (e.g. overnight).

Chlorinators must feed downstream of the heater and have an anti-siphoning device to prevent chemical back-up into the heater when the pump is shut off.

See plumbing diagram page 21.

NOTE:

High chemical concentrates from feeders and chlorinators that are out of adjustment will cause rapid corrosion to the heat exchanger. Such damage is not covered under the warranty.

CAUTION:

Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.

COLD WEATHER OPERATION

IMPORTANT FREEZE INFORMATION

MODERATE CLIMATE: Heater operation can contin-

ue during short-term cold spells. When temperatures are between 0° and 32°F, flow (continuous pump operation) must be maintained.

CAUTION: Do not use the heater to maintain water temperatures just above freezing or for freeze protection. When heater is used during freezing weather, care must be taken to avoid freeze-ups. Continuous pump operation is a must. Additional protection may be required. The heater is not warranted against freeze-ups.

COLD CLIMATE: Prolonged operation with water temperatures below 50°F is not recommended. When starting the heater with water temperatures below 50°F, operate the heater continuously until higher temperatures are reached. Operating the heater for prolonged periods with pool water below 50°F can seriously damage the heater, and is not covered by the warranty.

For cold climate areas, please follow the winterizing procedures listed.

WINTERIZING THE POOL & SPA HEATER

Heaters installed outdoors in freezing climate areas may be shut down for the winter. Observe the following procedure for winterizing the heater:

1. Turn off gas valve, manual gas valve, and electrical supply to the heater.

2. Open drain plug located on the inlet/outlet header, (under water pipes). Remove the heat exchanger inspection panel on the side opposite water piping to gain access to the drain plug on the return header. Open drain plug on return header.

For ASME Heaters only: Disconnect compression fittings from the pressure switch and return header that connects to the 1/4" copper tube and allow the tube to drain.

Fig. No# 2001

Return Header

Drain Plug

PART TWO INSTALLATION AND SERVICE INSTRUCTIONS

SECTION 1 - RECEIVING EQUIPMENT

The manufacturer recommends that this manual be reviewed thoroughly before installing your pool/spa heater. If there are any questions that this manual does not answer, please contact the factory or your local representative. On receipt of your equipment it is suggested that you visually check for external damage to the carton. If the carton is damaged, a note should be made on the Bill of Lading when signing for the equipment. Remove the heater from the carton. If it is damaged, report the damage to the carrier immediately. Save the carton.

These items are shipped inside a box in the carton with the heater:

STANDARD UNIT (POLYMER HEADERS) ASME UNIT (CAST IRON HEADERS)

1. "Pagoda" top 1. "Pagoda" top

2. 2" CPVC union with "O" rings (2) 2. In/Out flanges (2)

3. Plastic pipe finish flange for gas line 3. 1-1/2" flange gaskets (2)

4. Bonding lug with mounting screw 4. 2" flange gaskets (2) (Digital models only) 5. Flange bolts (4)

6. Pressure relief valve

7. 2" CPVC adapters (2)

8. Plastic pipe finish flange for gas line.

9. Bonding lug with mounting screw. (Digital models only)

Be sure that you receive the number of packages indicated on the Bill of Lading.

When ordering parts, you must specify the model and serial numbers of the heater. See below for location of serial number. When ordering under warranty conditions, you must also specify date of installation.

Serial No.

LABEL ON CARTON

MODEL & SERIAL NO.

LOCATED ON

RATING PLATE

(ALTERNATE

LOCATION)

SECTION 3 - INSTALLATION INSTRUCTIONS

CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals known to the State of California

to cause cancer, birth defects or other reproductive harm.

IMPORTANT NOTICE

These instructions are intended only for the use of qualified personnel, specifically trained and experienced in the installation of this type of heating equipment and related system components. Installation and service personnel may be required by some states to be licensed. If your state is such, be sure your contractor bears the appropriate license. Persons not qualified shall not attempt to fix this equipment nor attempt repairs according to these instructions.

WARNING:

Improper installation, adjustment, alteration, service or maintenance may damage the equipment,

create a hazard resulting in asphyxiation, explosion or fire, and will void the warranty.

CODE REQUIREMENTS

NOTE:

The heater should not be located in an area where possible water leakage will result in damage to the area adjacent to the heater or to the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, with adequate drainage, be installed under the heater. The pan must not restrict combustion air flow.

Installation must be in accordance with local codes, or, in the absence of local codes, with the latest edition of the the National Fuel Gas Code, ANSI Z223.1/NFPA54 and National Electrical Code, ANSI/NFPA 70, and for Canada, the latest edition of CAN/CGA-B149.1 and B149.2 Installation Codes, and Canadian Electrical Code, CSA C22.1 Part 1 and Part 2.

SECTION 2 - GENERAL SPECIFICATIONS

These heaters are design-certified and tested under the latest requirements of the ANSI Z21.56 / CSA 4.7 Standard for Gas-Fired Pool Heaters. All heaters can be used either indoor or outdoors. The appropriate top designated for each type of use is required. If necessary, the top can be changed at a later date to change from outdoor to indoor or vice versa. Millivolt heaters contain a self-generating electrical system operating between .25 and .75 VAC.

Ambient Temperature Rating of Heater Components

Millivolt Heater with Honeywell Gas Valve +32°F to +175°F Millivolt Heater with Robertshaw Gas Valve 0°F to +175°F Digital Heater* -32°F to + 175°F *Requires 120 or 240VAC Power Supply

Atmospheric heaters:

Rated inputs are suitable for up to 2,000 feet elevation. For elevations above 2000 feet, reduce input 4% for each 1,000 feet above sea level, as high elevation reduces combustion performance.

Low NOx heaters:

Rated inputs are suitable for up to 5,000 feet elevation. For elevations above 5000 feet, consult the factory.

OUTDOOR HEATER INSTALLATION

These heaters are design-certified for outdoor installation, when equipped with the approved tops designated for outdoor use.

WARNING: The heater shall not be located in an area where water sprinklers, or other devices, may cause water to spray through the cabinet louvers and into the heater. This could cause internal rusting or damage electrical components, and void the warranty.

WARNING: Do not install within 3 feet of a heat pump or an outdoor condensing unit. Strong air intake from this type of equipment can disturb the combustion process and cause damage or personal injury.

HEATER WITH OUTDOOR STACKLESS TOP

Pagoda Top Installation

1. Insert tabs into keyhole (4 places).

Pagoda Top (Shipped inside

box in heater carton)

2. Snap tabs into keyholes so as not to pull out.

CLEARANCES

ALL HEATERS For clearances from combustible surfaces, see the chart below.

CLEARANCE FROM COMBUSTIBLE CONSTRUCTION

INDOOR INSTALLATIONS:

Top* - 30” (Drafthood) Back - 6” Front - Alcove (Open) Right Side - 12” (Water Side) Vent - 6” Left Side - 6” Floor** - 0” (Opposite Water Side)

OUTDOOR INSTALLATION:

Top* - Unobstructed

(Outdoor Stack)

Top*** - 36”

(Stackless Top)

Floor - 0” Right Side - 12” (Water Side) Back - 6” Left Side - 6”

(Opposite Water Side)

*Clearance from top of vent terminal. **Do not install on carpeting. ***Clearance from top of heater.

When installed according to the listed minimum clearances from combustible construction, the pool heater can still be serviced without removing permanent construction around the heater.

However for ease of servicing, we recommend a clearance of at least 24” in the front, and at least 18" on the water connection side. This will enable the heater to be serviced in its installed location, that is, without movement or removal of the heater.

Clearances less than these (6” minimum), may require removal of the heater to service either the heat exchanger or the burner tray. In either case, the heater must be installed in a manner that will enable the heater to be serviced without removing any structure around the heater.

FLOORING: This heater can be installed on combustible flooring.

Pagoda Top

Heaters must not be installed under an overhang of less than three 3 ft from the top of the heater. Three sides must be open in the area under the overhang. Roof water drainage must be diverted away from the heaters installed under overhangs with the use of gutters.

For U.S. installations, the point from where the flue products exit the heater must be a minimum of 4 ft below, 4 ft horizontally from, or 1 ft above any door, window or gravity inlet into any building. The top surface of the heater shall be at least 3 ft above any forced air inlet, or intake ducts located within 10 ft horizontally.

For installations in Canada, pool heaters shall not be installed with the top of the vent assembly within 10 ft below, or to either side, of any opening into the building. Refer to the latest revisions of CAN/CGA-B149.1 and B149.2.

For installations in Florida, that must comply with the Florida Building Code 2001, follow the directions on p14 for the installation of hurricane tie-down brackets for all models.

4 ft

Minimum

4 ft

Minimum

4 ft

Minimum

3 ft

Minimum

10 ft

Minimum

1 ft

Minimum

Forced Air Inlet

FLORIDA BUILDING CODE 2001

WIND SPEED = 150 MPH, 3 SECOND GUST

EXPOSURE = C

206/266/336/406 Atmospheric

MODEL # B

206 20”

266 23”

336 26”

406 29”

2” x 8” x 1/8” Raypak Pallet

nchor Bracket (4 Total)

40”

28”

3” Min. Conc. Pad by others

1/4” x 1-3/4” S.S. Tapcon Bolt & Washer NOTE: Use hole closest to unit with washer overlapping edge of unit.

Min. Edge Distance

6”

(1)–1/4” x 1-3/4” S.S. Tapcon Bolt & Washer Ea. Raypak Pallet Anchor Bracket Use hole closest to unit (4 total)

3” Min. Conc. Pad by others

Min. Edge Distance

6”

(1)–1/4” x 1-3/4” S.S. Tapcon Bolt & Washer Ea. Raypak Pallet Anchor Bracket Use hole closest to unit (4 total)

ARNING: Indoor heaters require a drafthood that must be connected to a vent pipe and properly vented to

the outside. Failure to follow this procedure can cause fire or fatal carbon monoxide poisoning.

INDOOR HEATER INSTALLATION

The heater is also design-certified for indoor installation when equipped with the approved drafthood.

For Canada, indoor installation is restricted to an enclosure that is not occupied and does not directly communicate with an occupied area. Refer to the latest edition of CAN/CGA-B149.1 and B149.2 for specific requirements. Locate heater as close as is practical to a chimney or gas vent. Heater must always be vented to the outside. See Vent Piping section (pg. 17-18) for details. Minimum allowable space is shown on the nameplate.

OUTDOOR STACK / INDOOR STACK

NOTE: The outdoor and indoor stacks are optional equipment and do not come standard with the heater.

OUTDOOR ST

ACK KIT INCLUDES:

(1) Drafthood, painted (1) Adapter plate (3) Mounting brackets (clips) (1) Top panel cover (2) 1-foot sections of metal tape (3) Screws (1) Instructions

Clips

INDOOR ST

ACK KIT INCLUDES:

(1) Drafthood, unpainted (1) Adapter plate (3) Mounting brackets (clips) (3) Screws (1) Instructions

Clips

**REFER TO INSTALLATION INSTRUCTIONS

INSIDE BOX FOR INSTRUCTIONS ON HOW TO INSTALL OUTDOOR/INDOOR STACK.

OUTDOOR STACK INDOOR STACK

Model Part No. Part No.

206A/207A 266A/267A 336A/337A 406A/407A

009834 009835 009836 009837

009838 009839 009840 009841

SPECIFICATIONS AND DIMENSIONS

Heater

Model

BTUH

Input

(000)

(A)

Cabinet

Width

(B)

Flue

Dia.

(C)

Indoor

Drafthood

(J)

Min.

Gas

Conn.

Water Conn.

Shipping Weights (lbs)

Standard

Heater

w/Stackless

To p

ASME

Heater

w/Stackless

To p

Indoor

Draft-

hood

R206A 199.5 20” 6” 61-5/8” 11-3/4” 3/4” 2” 187 206 12

R266A 266.0 23” 7” 62” 11” 3/4” 2” 210 229 15

R336A 332.5 26” 8” 63” 10-5/8” 3/4” 2” 230 249 17

R406A 399.0 29” 9” 64-9/16” 12-1/8” 3/4” 2” 249 268 20

ATMOSPHERIC UNITS

Designation for a Digital heater using propane gas is “EP”; a Digital heater using natural gas is “EN”. Designation for a Millivolt heater using propane gas is “MP”; a Millivolt heater using natural gas is “MN”. Prefix “C” is for cast iron (ASME) headers; “P” is for plastic (polymer) headers. Suffix “X” is for cupro-nickel tubing; “C” is for copper tubing. EXAMPLE: P-R406A-EN-X = Plastic headers, 406 model size, digital, natural gas, cupro-nickel. Reduce input 4% for each 1000 ft above sea level when installed above 2000 ft elevation. For Canada, no de-rating is required for elevations up to 4500 ft Plastic (polymer) headers cannot be used for ASME installations.

8-7/8"

(6-5/8" ASME)

STACKLESS

OUTDOOR TOP

INDOOR

DRAFTHOOD

38"

13-1/4"

CONNECTION

GAS

32-11/16"

ELECTRICAL

CONNECTION

26-5/8"

(28-5/8" ASME)

4-3/8"

(3-3/8" ASME)

28"

40"

Low NOx UNITS

Heater

Model

BTUH

Input

(000)

(A)

Cabinet

Width

(B) Flue Dia.

(C)

Indoor

Drafthood

(J)

Min. Gas

Conn.

Water Conn.

Shipping Weights (lbs)

Standard

Heater

w/Stackless

To p

ASME

Heater

w/Stackless

To p

Indoor

Draft-

hood

R207A 199.5 20” 6” 55-5/8” 11-3/4” 3/4” 2” 174 193 12

R267A 266.0 23” 7” 56” 11” 3/4” 2” 197 216 15

R337A 332.5 26” 8” 57” 10-5/8” 3/4” 2” 219 238 17

R407A 399.0 29” 9” 58-1/2” 12-1/8” 3/4” 2” 237 256 20

Designation for a Digital heater using natural gas is “EN”. Prefix “C” is for cast iron (ASME) headers; “P” is for plastic (polymer) headers. Suffix “X” is for cupro-nickel tubing; “C” is for copper tubing. EXAMPLE: P-R407A-EN-X = Plastic headers, 407 model size, digital, natural gas, cupro-nickel. For altitudes above 5,000 ft., consult the factory. For Canada, no de-rating is required for elevations up to 4500 ft. Plastic (polymer) headers cannot be used for ASME installations.

SPECIFICATIONS AND DIMENSIONS

INDOOR

DRAFTHOOD

31-13/16"

7-3/4"

GAS

CONNECTION

26-1/2"

ELECTRICAL

CONNECTION

20-1/2"

(22-1/2" ASME)

4-3/8"

(3-3/8" ASME)

28"

8-7/8"

(6-5/8" ASME)

OUTDOOR TOP

34"

STACKLESS

B. All Air From Outdoors:

When air is supplied directly from outside of building, each opening shall have a minimum net free area as noted:

COMBUSTION AND VENTILATION AIR (Indoor Units Only)

The heater must have both combustion and ventilation air. Minimum requirements for net free air supply openings are one opening that is 12 inches from the ceiling for ventilation, and one opening that is 12 inches from the floor for combustion air as outlined in the latest edition of the National Fuel Gas Code, ANSI Z223.1(CanadaCAN/CGA-B149.1 and B149.2) and any local codes that may have jurisdiction.

CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.

A. All Air From Inside The Building:

Each opening shall have a minimum net free area as noted:

Model Square Inches Model Square Inches

206/207 200 336/337 333 266/267 266 406/407 399

Model Square Inches

206/207 50 266/267 67 336/337 84 406/407 100

VENT PIPING

Vent piping the same size as the drafthood outlet is recommended, however, when the total vent height is at least 10 ft (drafthood relief opening to vent terminal), the vent pipe size may be reduced as specified in Chapter 10 of the National Fuel Gas Code, ANSI Z223.1 (Canada - CAN/CGA-B149.1 and B149.2). As much as pos- sible, avoid long horizontal runs of vent pipe and too many elbows. If installation requires horizontal runs, the vent pipe must have a minimum

of 1/4 in. per ft rise and should be supported at not more than five foot intervals. Plumbers tape, criss-crossed, will serve to space both horizontal and vertical piping. Gas vents supported only by the flashing and extending above the roof more than five feet should be securely guyed or braced to withstand snow and wind loads. We recommend use of insulated vent pipe spacers through the roofs and walls. Another option for installation that requires horizontal runs is using the D-2 power vent kit option.

The power vent assembly is a fan-assisted combustion system designed for application to models 206-407. The unit, when installed as directed, is capable of operating in applications such as through-the-wall venting and reduced horizontal and vertical vent pipe sizes in new and current installations. The unit is factory-wired for 240 VAC, with capability of rewiring for 120 VAC.

For protection against rain or blockage by snow, the vent pipe must terminate with a vent cap which complies with the local codes or, in the absence of such codes, to the latest edition of the National Fuel Gas Code, ANSI

Z223.1 (Canada - CAN/CGA-B149.1 and B149.2).

WARNING: Indoor heaters require a drafthood that must be connected to a vent pipe and properly vented to

the outside. Failure to follow this procedure can cause fire or fatal carbon monoxide poisoning.

Power Vent Kit

Model Part No.

206/207 009832

266/267 009832

336/337 009833

406/407 009833

Fig.# 9469

Optional Raypak D-2

Power Vent

For more information consult the D-2 Power Vent manual, (Catalog No. 6000.57.1).

The discharge opening must be a minimum of 2 ft vertically from the roof surface and at least 2 ft higher than any part of the building within 10 ft. Vent stack shall be at least 5 ft in vertical height above the drafthood outlet. The vent cap location shall have a minimum clearance of 4 ft horizontally from, and in no case below, unless a 4 ft horizontal distance is maintained, from electric meters, gas meters, regulators and relief equipment.

The weight of the vent stack or chimney must not rest on heater drafthood. Support must be provided in compliance with applicable codes. The heater top and drafthood must be readily removable for maintenance and inspection. Vent pipe should be adequately supported to maintain proper clearances from combustible construction.

Type "B" double-wall or equivalent vent pipe is recommended. However single-wall metal vent pipe may be used as specified in the latest edition of the National Flue Gas Code ANSI Z223.1 (Canada - CAN/CGA-

B149.1 and B149.2).

GAS SUPPLY CONNECTIONS

Gas piping must have a sediment trap ahead of the heater gas controls, and a manual shut-off valve located outside the heater jacket. All gas piping should be tested after installation in accordance with local codes.

CAUTION:

The heater and its manual shut-off valve must be disconnected from the gas supply during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa). Dissipate test pressure in the gas supply line before reconnecting the heater and its manual shut off 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 flame.

Fig.# 8119.2

Fig.# 8090.1

NOTE:

Do not use Teflon tape on gas line pipe thread. A flexible sealant suitable for LP gases is recommended.

A minimum of 7 in. WC and a maximum of 14 in. WC upstream pressure under load, and no-load conditions must be provided for natural gas or a minimum of 12 in. WC and a maximum of 14 in. WC for propane gas.

10' OR LESS

2' MIN

VENT PIPE

DRAFT HOOD

HEATER

VENT CAP

2' MIN

5' MIN

GAS PRESSURE REGULATOR

The gas pressure regulator is preset at 4.0 in. WC throughout for natural gas, and 10.5 in. WC. for propane gas. The pressure at the gas valve, taken with a manometer, should be about 4.0 in. WC natural gas (3.0 in. WC for Low NOx) and 10.5 in. WC propane gas. If an adjustment is needed, remove seal and turn adjustment screw clockwise to increase pressure or counter-clockwise to decrease pressure.

NOTE:

Low NOx gas valves are non-adjustable; setting was made at the manufacturer (Invensys/Robertshaw).

GAS PRESSURE ADJUSTMENT LOCATIONS

MILLIVOLT GAS VALVES

ELECTRONIC IGNITION GAS VALVES

Gas Pressure Adjustment

Gas Pressure

Adjustment

Fig # 9263

Robertshaw 7000 (Heater Models 206-406)

Honeywell VR8304 (Heater Models 206-

406)

ELECTRONIC IGNITION GAS VALVES-CONTINUED

Gas Pressure

Adjustment

Robertshaw 7200

(Heater Model 206)

Robertshaw 7000 BDER

(Heater Models 266-336)

Gas Pressure

Adjustment

Robertshaw 7000 DERHC

(Heater Model 406)

PIPE SIZING FOR GAS CONNECTIONS

Robertshaw 7000 BDERF

(Heater Models 207-407)

Non-Adjustable

Gas Valve

Maximum Equivalent Pipe Length

Natural Gas 1000 BTU/FT30.60

Specific Gravity @ 0.5 in. WC Pressure Drop

Propane Gas 2500 BTU/FT31.53

Specific Gravity @ 0.5 in. WC Pressure Drop

Input 3/4” 1” 1-1/4” 1-1/2”

Model (KBTU) N P N P N P N P

206/207 199.5 25 60 90 215 360

266/267 266.0 15 35 50 125 210 480 445

336/337 332.5 10 20 30 80 140 320 290

406/407 399.0 15 20 55 95 225 215 480

MANOMETER

MANUAL

SHUT-OFF

VALV E

GAS PRESSURE TEST AT GAS VALVE

PLUMBING FOR WATER CONNECTIONS

The heater requires water flow and positive pressure to fire and operate properly. It must therefore be installed downstream of the discharge side of the filter pump. A typical installation is plumbed as follows:

1. The inlet side of the filter is plumbed directly to the discharge side of the filter pump;

2. The outlet side of the filter is then plumbed to the inlet of the heater; and

3. The outlet of the heater is plumbed to the return line to the pool or spa. The pump, filter and heater are thus plumbed in series.

Heater must be located so that any water leaks will not damage the structure of adjacent area. PVC pipe may be glued directly into header unions (Standard models only).

CAUTION:

An additional source of heated water, e.g. a solar system, must be connected to the main line ahead of the heater inlet pipe in order for it to act as the primary heat source. If the primary system provides adequate heat to maintain set-point, the heater will not fire. Be advised that the control panel will then display sensed water temperatures downstream of the primary heating system, rather than the temperature of the water exiting the pool.

Plumbing from the heater back to the pool or spa must not have any valves or restriction that could prevent flow when the pump is operating.

MODEL PIPE SIZE MIN. GPM MAX. GPM*

206/207 1-1/4”–1-1/2” - 2” 20 125

266/267 1-1/4”–1-1/2” - 2” 25 125 336/337 1-1/4”–1-1/2” - 2” 35 125

406/407 1-1/4”–1-1/2” - 2” 40 125

*When flow rates exceed maximum GPM an external auxiliary bypass valve is required. See external bypass valve section for details.

POLYMER HEADERS

Fig.# 2012

CAST IRON HEADERS (ASME)

FLOW RATES

VALVE CLOSED WHEN SYSTEM IS HEATING THE POOL

VALVE CLOSED WHEN SYSTEM IS HEATING THE SPA

CHEMICAL INSERTION POINT (IF IN THE PIPING SYSTEM)

HEATER WITH INTERNAL BYPASS

ISOLATION VALVE

BALL VALVE

PRESSURE RELIEF VALVE

PUMP

UNION

CHECK VALVE

TO SPA

FILTER

PUMP

COARSE STRAINER

TO POOL

CAST IRON HEADERS (ASME MODELS)

Heater must be located so that any water leaks will not damage the structure of adjacent area. High temperature 2" plastic pipe (CPVC) may be threaded directly into the header flanges. This is not the same as the Schedule 80 PVC pipe which is also gray. PVC may be used immediately after the supplied CPVC adapters.

DO NOT use petroleum-based assembly fluids (such as petroleum jelly or lubricating oil). If assembly lube is required, use a silicon base such as AquaLube etc.

There are two sets of flange gaskets supplied with your heater. Use the appropriate gaskets for all your heater connections. Discard unused set.

WARNING:

NEVER install PVC directly into header flanges. Use the 2" CPVC adapter supplied loose with the heater.

Fig.# 8095.1

Fig.# 8097.1

INLET/OUTLET HEADER - ASME

Flange Gasket

Header Flange

UNITHERM GOVERNOR OPERATION

CAUTION:

The patented Unitherm Governor is a thermostatic mixing valve specifically designed to maintain constant heater internal temperature between 105° and 115°F despite continually changing flow rates from the filter and changing pool temperatures. This narrow range is needed to prevent damaging condensation on the burners which will occur if the heater runs for any length of time below 100°F. It is also needed to inhibit scale formation in the tubes by maintaining temperatures well below accelerated scaling temperatures.

U.G. Plug (Polymer)

Unitherm Governor

Gasket

Fig.# 2011

Fig.# 8093.1

POLYMER HEADERS (STANDARD MODELS)

Before attaching the 2-inch unions to the inlet/outlet header, make sure the O-rings are properly seated in the grooves. Use AquaLube or equivalent non-petroleum-based lubricant on the O-ring. Hand tighten the unions. Glue PVC piping directly to the unions.

INLET/OUTLET HEADER - POLYMER

High-temperature CPVC header flanges and header flange nuts are provided. If there is any possibility of back-siphoning when the pump stops, it is suggested that a check valve (or valves) also be installed in the system.

O-Ring

Header Flange (CPVC)

Header Flange Nut (CPVC)

Fig.# 2002.1

GASKET DESIGN #1: Accepts 1-1/2" copper tube or 1-1/4" galvanized pipe as a slip connection. GASKET DESIGN #2: Accepts 2" copper tube as a slip connection. The flange is threaded for 2" screw in pipe connections. Also used with the 2" CPVC adapters.

#1 #2

Header

Header Flange

(Supplied)

CPVC Connector

(Supplied)

Plumbing

INTERNAL AUTOMATIC BYPASS VALVE

In addition to the Unitherm Governor, a built-in automatic bypass valve is provided in the in/out header. While the Unitherm Governor responds to the changes in water temperature in the heater, the internal bypass valve automatically responds to changes in water pressure in the piping system. Proper amount of water flow is maintained through the heater under varying pressures dictated by the conditions of the pump and filter.

EXTERNAL AUXILIARY BYPASS VALVE

(Where Required) An auxiliary bypass valve should be used when flow rates exceed 125 GPM. Usually a high-performance pump size larger than two horsepower will exceed this flow rate. This valve is required to complement the function of the automatic bypass valve, particularly when starting the heater in winter or early spring when the spa or pool temperature is below 50°F. It also serves to eliminate needless pressure drop through the heater and accompanying reduction in the flow rate to the spa jets, etc.

From Heater To Heater

To Pool/ From Pool/ Spa Spa

AUXILIARY BYPASS VALVE

(DO NOT USE GATE VALVE)

Bypass Disc

Spring

Bypass Body

Fig.# 2003

Fig.# 81.50.0

AUXILIARY BYPASS VALVE ADJUSTMENT

To set bypass: With clean filter, adjustment is made by feeling the inlet and outlet pipes at the heater. Outlet pipes should be slightly warmer than inlet and comfortable to the touch. If pipe is hot, close bypass; if cold, open bypass.

PRESSURE RELIEF VALVE INSTALLATION

To conform to local building codes, it may be necessary to install a pressure relief valve. A 3/4" pressure relief valve, having a capacity equal to the BTUH output of the model to be installed, is recommended for this heater. The maximum acceptable pressure relief valve setting is 125 psi.

A 3/4" NPT connection is provided in the Polymer header for installation of a pressure relief valve. The valve shall be installed in a vertical position. Do not overtighten. Install pressure relief valve hand tight plus 1/2 turn.

POLYMER HEADER (STANDARD MODELS)

Pressure Relief Valve

PRV Discharge

Connection

In/Out Header

Fig. #2004

A 3/4" NPT connection is provided in the header for installation of a pressure relief valve. The valve shall be installed in a vertical position.

CAST IRON HEADER (ASME MODELS)

NOTE:

To avoid water damage or scalding due to valve operation, drain pipe must be connected to valve outlet and run to a safe place of discharge. Drain pipe must be the same size as the valve discharge connection throughout its entire length and must pitch downward from the valve. No shut-off valve shall be installed between the relief valve and the drain line. Valve lever should be tripped at least once a year to ensure that waterways are clear.

PRV

HEAT EXCHANGER PRESSURE DROP TABLES

POLYMER HEADER (STANDARD MODELS)

FLOW

GPM

PRESSURE DROP (FT OF HEAD)

206/207 266/267 336/337 406/407

1.5 2.8 4.1 4.1

1.7 4.6 5.8 5.8

2.1 5.2 6.5 6.5

2.4 5.6 7.2 7.2

2.8 6.1 7.7 7.7

3.7 6.5 8.2 8.2

4.6 7.3 8.7 8.7

5.7 8.8 10.2 10.2

100

6.8 10.0 13.0 13.0

CAST IRON HEADER (ASME MODELS)

FLOW

GPM

PRESSURE DROP (FT OF HEAD)

206/207 266/267 336/337 406/407

1.8 3.9 3.9 3.9

2.2 8.0 8.0 8.0

2.5 9.0 9.0 9.0

2.7 9.8 9.8 9.8

3.3 10.5 10.5 10.5

4.3 11.0 11.0 11.0

5.5 11.5 11.5 11.5

6.8 14.0 14.0 14.0

100

8.2 17.0 17.0 17.0

HEAT EXCHANGER REVERSAL PROCEDURE - STANDARD MODELS

1. Remove right and left side access panels (Figure 1).

2. Disconnect wires at high limit, AGS (automatic gas shut-off), and pressure switch on the in/out header (Figure 2).

3. Digital Models: Remove the thermostat tempera- ture sensor by loosening the compression fitting nut (Figure 3). Re-route the sensor to the left side of the heater.

4. Millivolt Models: Remove the temperature sen- sor bulb and retainer clip from the sensor well (Figure 4). Re-route the sensor bulb to the left side of the heater.

5. Remove (12) bolts holding the inlet/outlet and return headers to the tube sheets. Clean off tube sheet area where the gasket seats. Also clean off the header and the gasket. Apply a non-petroleum-based lubricant to the gasket such as AquaLube. Re-attach the headers to the opposite sides, making sure they are installed in an upright position (Figure 5). Do not over tighten. Torque should not exceed 7 ft/lb.

6. Reconnect high limit, AGS, and pressure switch wires.

7. Digital Models: Insert the tempera-ture sensor in the compression fitting and tighten 1/2 turn past hand-tight.

8. Millivolt Models: Insert sensor bulb and retainer clip into sensor well.

9. Allow for water flow through the heater and check for leaks.

10. Re-attach access panels to the opposite sides.

For ASME Models call your factory representative.

Fig. #1

Fig. #2

Fig. #3

Fig. #5

Fig. #4

ATMOSPHERIC

Wiring locations

LOW NOx

Wiring locations

ELECTRICAL WIRING

NOTE:

If it is necessary to replace any of the original wiring, use 105°C wire or its equivalent, and/or 150°C wire or its equivalent, like the original wiring.

MILLIVOLT MODELS

The Millivolt models are equipped with a self-generating electrical system in which the electrical current is provided by a pilot generator. No external electrical connections are required.

When installing a remote switch, do not exceed 10 ft of wiring from the heater. Use 18-gauge stranded wire.

DIGITAL MODELS

The standard field-wiring connection is on the right side of the heater.

To wire the heater from the left side, follow these steps :

1. Remove the two (2) screws that hold the front door

to the heater. Remove and set aside door for better access to wiring.

2. Remove the four (4) screws that hold down the

junction box to the sway brace.

3. Remove the transformer cover located on the far

right by removing one (1) screw.

4. Remove the two (2) screws that hold down the

transformer.

5. Remove the one (1) screw that holds down the

ground wires.

6. Disconnect P6 connector from PC board.

7. Remove transformer from its current location and

relocate it on the far left side of the heater.

8. Re-route all high-voltage wires and ground wires

through the left jacket side of heater.

9. Re-install P6 connector, ground wires (SPG),

transformer, junction box, front door, and plug right side with the left side’s grommet plug.

NOTE:

7/8" dia. holes not utilized on jacket and control box can be used for fireman switch, auxiliary control interface or power vent (D-2) wiring.

NOTE:

Heater must be electrically grounded and bonded. Bonding lug is provided loose with the heater. Install bonding lug on lower right or left side of jacket as necessary for bonding the heater. Mounting hole is provided on the jacket.

NOTE:

Heaters are factory-wired for 240 VAC power supply.

The Electronic Intermittent Ignition Device automatically lights the pilot and main burners upon a call for heat. The heater is supplied with a dual-voltage transformer for 120 VAC or 240 VAC input power hookup.

OPTION LOCATION

LEFT SIDE FIELD WIRING

CONTROL BOX (FACTORY MOUNTED LOCATION)

SWAY BRACE

BONDING LUG

(OPTIONAL LOCATION)

BONDING LUG (STANDARD LOCATION)

OPTION LOCATION

LEFT SIDE FIELD WIRING

BONDING LUG

(OPTIONAL LOCATION)

CONTROL BOX (FACTORY MOUNTED LOCATION)

SWAY BRACE

BONDING LUG (STANDARD LOCATION)

TRANSFORMER WIRING

120 V

AC WIRING

For 120 VAC input power to the unit, connect the black wire to the “L1” or hot leg of the power supply. Connect the white wire to the “Ret” or neutral leg of the power supply. Attach the wire nut to the red wire. There should be no connection to the red wire for 120 VAC operation. For Low NOx pool heaters attach a wire nut to each red wire independently.

Fig. #9471

240 VAC WIRING

For 240 VAC input power to the unit, connect the black wire to the “L1” or hot leg of the power supply. Connect the red wire to the “L2” or second hot leg of the power supply. Attach the wire nut to the white wire. There should be no connection to the white wire for 240 VAC operation. For Low NOx pool heaters attach a wire nut to each white wire independently.

Fig. # 9471.1

Heater must be electrically grounded and bonded in accordance with local codes, or, in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70. (Canada - Canadian Electrical Code, CSA C22.1, Part 1 and Part 2.)

NOTE: Input power to the heater (120 or 240 VAC) can be supplied from the load (pump) side of time clock or directly from the GFCI power source. It is preferred to make connection to the load/pump side of the time clock. If using the switched GFCI power source, the heater could display false service indicators on the display panel if the pump is turned off.

NOTE: If the transformer’s primary side is wired for 120 VAC and 240 VAC is applied, damage to the transformer and PC board may result. Such damages are not covered under manufacturer’s limited warranty.

120V ATMOSPHERIC HEATER 120V LOW NOx HEATER

BLACK

WHITE

HEATER

7 WIRES

SUPPLY

SIDE

RETURN

NEUTRAL

GROUND

HOT

BLACK

WHITE

GREEN

BLACK

WHITE

GREEN

HEATER 4 WIRES

SUPPLY

SIDE

RETURN

NEUTRAL

HOT

BLACK BLACK

WHITE WHITE

GREEN GREEN

RED

240V ATMOSPHERIC HEATER 240V LOW NOx HEATER

BLACK

RED

WHITE

HEATER 7 WIRES

SUPPLY

SIDE

HOT

BLACK

HOT

RED RED

BLACK

GREENGREEN

WHITE

HEATER 4 WIRES

SUPPLY

SIDE

GROUND

HOT

BLACK

HOT

RED

GREEN GREEN

WHITE

WIRING DIAGRAM - MILLIVOLT (MECHANICAL THERMOSTAT)

WIRING DIAGRAM - DIGITAL MODELS - ATMOSPHERIC

WIRING DIAGRAM - DIGITAL MODELS - LOW NOx

SECTION 4 - SERVICING INSTRUCTIONS

GENERAL LOCATION OF CONTROLS

ATMOSPHERIC

LOW NOx

Digital Thermostat

Circuit Board

Drain Plug

(Located in rear header)

Unitherm Governor

Mounted On Top

Of Header

HL1 - High Limit HL2 - High Limit Pressure Switch Temp Sensor/Well

Pilot

Roll-Out

Switch

Gas Valve

Transformer

Draw Plug

Digital Thermostat

Circuit Board

Drain Plug

(Located in rear header)

Unitherm

Governor

Mounted On Top

Of Header

HL1 - High Limit HL2 - High Limit Pressure Switch Temp Sensor/Well

Pilot

Roll-Out

Switch

(Manual)

Gas Valve

Transformer

Draw Plug

Blower

Relay

Air

Switch

Blower

Roll-Out Switch (Auto)

Blower Hose

CONTROL PANEL REMOVAL

1. Remove (2) screws from front door. Set aside door for serviceability.

CONTROL ADJUSTMENTS - MILLIVOLT MODELS

The water temperature is controlled by the heater thermostat on the upper front panel of the heater. The control center contains an On/Off switch and one thermostat.

The thermostat is fitted with a means of limiting the upper temperature limit below the maximum level. The knob stop adjustment ring illustrated below is adjustable by loosening the set screw, rotating the knob stop ring to the desired location and re-tightening the set screw.

SPA TEMPERATURE RANGE

POOL TEMPERATURE

RANGE

KNOB STOP RING

SET SCREW

STAND-BY

TEMPERATURE

KNOB STOP SHOWN ABOVE IS

IN THE SPA TEMPERATURE RANGE

Fig.# 9473

Fig. #9472

Temp Adjust Buttons

Mode Button

LCD Display

OFF

2. Remove (4) screws from sides of control panel.

3. Rotate control panel down until panel stops. Do not force.

NOTE:

Caution must be used to not damage controls or wiring.

CONTROL ADJUSTMENTS - DIGITAL MODELS

ACCESS

SCREWS

ACCESS SCREWS

THERMOSTAT CONTROL OPERATION

The pool heater thermostat, located on the upper front panel of the heater, controls the pool/spa water temperature. This control center contains a mode button, up and down temperature adjustment buttons, and an LCD display.

Mode Button

The MODE button functions as a means to turn the heater off or on in either the POOL or SPA setting. The LCD display indicates the mode the heater is in and the actual water temperature.

Temp Buttons

If the heater is in POOL or SPA mode, the desired water temperature (SETPOINT) will also be displayed and may be changed using the UP or DOWN buttons. A manual toggle switch is also provided right below the MODE button to allow the heater to be turned off.

Operation

In the POOL or SPA modes, the actual water temperature is displayed along with the desired water temperature (SETPOINT). If the heater is firing, a flame icon will be visible.

To adjust the setpoint temperature, make sure the control is in the appropriate mode (POOL or SPA) and push the UP or DOWN buttons.

Fault History File

To access the Fault History File, press the Mode but- ton until the display reads OFF. Press both the “UP” and “DOWN” buttons at the same time (5-7 seconds) until the display changes and shows a fault code. The latest fault code will be displayed first. By pressing the “UP” or “DOWN” buttons, a series of faults will be displayed from the last (highest number) to the first (lowest number). If the buttons are not touched after 5-7 seconds, the display will return to its normal operation.

Actual Water Temperature

Setpoint Temperature

Flame Icon

Mode

Pool or Spa

DIGITAL THERMOSTAT CONTROLS

Thermostat operation

Your heater is equipped with a microprocessor-controlled thermostat that controls the pool or spa temperature by measuring the temperature of the water coming back through the heater. It will then monitor the water temperature and turn the heater back on when it senses that the water temperature is falling below the set point. It is normal to experience small fluctuations in the return water temperature during the operation of the heater. The thermostat is calibrated with a very narrow tolerance to ensure accuracy of the set temperature. Thus,

slight fluctuations in water temperature may cause your heater to cycle on and off frequently. This is not a problem. It will not harm the heater nor interfere with the thermostat’s ability to precisely control the tem-

perature of the pool or spa.

WATER

TEMP

SET

POINT

MODE

TEMP

LCD Display

Temp Buttons Mode Button

Fig.# 9480

Program button

DISPLAY CALL FOR HEAT

Resets board to factory default settings.

Resets faults in the History File.

Change from Fahrenheit to Celsius.

SPA setpoint maximum adjustment.

POOL setpoint maximum adjustment.

SETdef – Default Settings

Refer to step one above to access the program screen. SETdef should appear on the screen. If not, press the Mode button until SETdef appears on the digital display. Press and hold both “UP” and “DOWN” buttons for 5-7 seconds until 3 dashes (---) appear. This operation resets the operating program to its factory default values. Both the POOL and SPA setpoints will revert to 65°F (18.5°C) and both POOL and SPA maximum temperature settings will be 104°F (40.0°C). Once this is done, reassemble the control panel.

RESfl – Reset Fault History

Refer to step one above to access the program screen. Press the Mode button until RESfl appears on the digital display. Press and hold both “UP” and “DOWN” buttons for 5-7 seconds until 2 dashes (--) appear.This operation resets the Fault History file to “0” and clears all the stored faults. Once this is done, reassemble the control panel.

Program Button

1) To access the program screen, press the Mode button until the display reads OFF. Remove the four screws holding the control cover on. Swing control panel down so the back side of the board is visible (see page 30). Locate the Program Mode button as shown in the figure on pg. 32. Press the program button (5-7 seconds) until SETdef appears on the digital display. Release the program button.

2) Press the Mode button sequentially until the

desired program event is reached. There are 5 different events that can be programmed. They appear in the sequence listed below:

F/Cfff – Fahrenheit to Celsius

Refer to step one above to access the program screen. Press the Mode button until F/Cfff appears on the digital display. The digital display is capable of displaying Celsius as well as Fahrenheit temperatures. The “UP” or “DOWN” buttons will select “F” or “C” on the temperature display. Choose the desired temperature scale. Once this is done, reassemble the control panel.

SETspa 104 – SPA Set Point Maximum Adjustment

Refer to step one above to access the program screen. Press the Mode button until SETspa 104 appears on the digital display. Using the “UP” and “DOWN” buttons will change the Maximum Temperature Setting to your desired value. The control can be set for a maximum of 107°F. Once this is done, reassemble the control panel.

SETpool 104 – POOL Set Point Maximum Adjustment

Refer to step one above access into the program screen. Press the Mode button until SETpool 104 appears on the digital display. Using the “UP” and “DOWN” buttons will change the Maximum Temperature Setting to your desired value. The control can be set for a maximum of 107°F. Once this is done, reassemble the control panel.

set

If the PRS fault code is displayed, it indicates that there is insufficient water flow through the heater. Make sure the pool filter and pump strainer are clean before calling a service representative.

DIAGNOSTICS

The digital thermostat models are equipped with onboard diagnostic controls. If there is a safety fault, a fault code will be displayed along with a service indication.

READING A FAULT

The word “SERVICE” will flash on and off if the PC board detects a known fault. The fault will be displayed in three big letters on the lower left of the display.

Fig.# 9482

Fig.# 9485

Service Will

Flash

3 Letter Fault Code See table for fault definition

STATUS CODES

Display Definition

CFH Call for heat CLK Time clock EOL End of line test (Factory Use Only) LON Low NOx Unit LOW Caution-low water temperature OFF Off mode PRO Propane gas configured REM Remote control activated SPK Spark SPR Spare fault code indicator

FAULT CODES

Display Definition

BD1 Board failure EEP Microprocessor error FAN Blower pressure failure FFL Flame sensing when pilot and gas

valves are closed GVC Gas valve closed GVO Gas valve open HL1 High limit switch #1 open HL2 High limit switch #2 open IGN Ignition failure ILO Ignition lockout PLT Pilot failure PRS Water pressure switch open ROL Heat roll-out safety switch open SNS Sensor failure VNT Vent switch open

PROGRAM MODES

Display Definition

CCC Celsius setting F/C Change from Fahrenheit to Celsius FFF Fahrenheit setting RES Reset defaults SET Set point max adjustment

NOTE: The LCD temperature display may not agree with the temperature reading of your pool or spa thermometer. The heater reads the water temperature at the inlet. Due to the circulation characteristics of any pool or spa, the water temperature at the inlet to the heater may differ from that observed at a given location in the pool or spa.

REMOTE CONTROL INSTALLATION AND OPERATION

CAUTION: Before installing remote controls to the digital thermostat model heaters read the following:

The digital thermostat model is remote-ready in most cases. The digital liquid crystal display (LCD) shows the actual pool temperature, operating status, and service codes (See examples below). The touch pad on the control panel allows you to select the desired pool or spa temperature. It also indicates when a remote system is controlling the heater by displaying REM in the display. When connecting the heater to a remote system, identify whether it is a two- or three-wire remote system. Select the appropriate instruction listed below to properly install the remote to the heater.

Fig.# 9487

Fig.# 9484

Fig.# 9486

Fig.# 9488

OFF Mode

Heating in the POOL Mode

Heating in the SPA Mode

Remote Mode

REMOTE OPERATION

The digital model heaters are equipped with the ability to work with external remote controls. The supplied 7pin remote wiring connector supplies power out to either a toggle switch or the switch contacts of a third party remote. The remote works by either making or breaking the circuit created by the remote wiring. Typically, a remote does not supply power to the heater, it only provides a switching function to turn the heater On or Off. If your remote is suppling its own

voltage to the heater, it will not work with this heater and may damage the digital circuit board.

ACTIVATING THE REMOTE

The digital thermostat heaters have the ability to disconnect from the remote it is wired to. To activate or deactivate the remote follow these steps:

Note: Electrostatic Discharge (ESD) damage can be caused by direct or indirect contact with the wiring or circuit board. When one walks to the heater area, an electrostatic charge accumulates on the body. Contact of a finger allows the body to discharge, possibly causing device damage. This damage can be limited if the service person discharges himself, following ESD preventive/removal practices, and holds on to the heater enclosure for 5 seconds before proceeding.

WATER

TEMP

SET

POINT

MODE

TEMP

Press and hold all three buttons for 5 to 7 seconds.

Fig.# 9480

The digital display format will change and indicate REMoFF or REMOn.

Fig.# 9489 Fig.# 9490

Pool Common

(BLK/ORN)

Spa Common

(ORN/BLK)

24VAC HOT

(BLU)

Fig.# 9491

7-PIN Remote

Wiring Connector

NOTE: When in remote operation, the keypad mode and temp buttons are disabled. Remote will flash even when the unit is off.

REMOn = External remote

control active (display will flash

REM)

REMoFF = Remote disabled

(heater thermostat will control heater - use this mode to test heater operation)

REM

REMOTE CONTROL WIRING

Important Installation Notes for Remote or External Wiring Configuration

• Remote wiring must be run in a separate conduit.

• Remote wiring must not be run parallel to high voltage lines.

• For runs of under 30 feet, remote wiring should have stranded conductors with a minimum of 22 AWG, 600V,

cable twisting 1.5 to 2.5 in. lay and jacketed.

• For runs over 30 feet, the conductors should be a minimum of 20 AWG, 600V, cable twisting 1.5 to 2.5 inch

lay that is shielded and jacketed.

• Maximum cable length is 200 feet.

• For both two- and three-wire remote systems, the provided 7-pin wiring connector must be utilized. Please

refer to the wiring instructions.

Note: The remote wires must be connected to the 7-pin connector before the connector is plugged into the board.

2-Wire Remote Control (On-Off)

This application assumes that only one heating function (pool or spa) is required.

1. Turn on power to the heater.

2. For a 2-Wire Remote Control from a remote without its own sensor, push the mode button to the “POOL” or “SPA” mode and set the desired setpoint (eg. 102 °F for spa).

3. For a 2-Wire Remote Control from a remote with

its own sensor, push the mode button “POOL” or “SPA” mode and set the temperature to the highest setting available on the control. The actual setpoint will be controlled by the remote control.

4. Turn the mode button to "OFF" and remove power from the heater.

5. On the "Remote Interface Harness", connect the BLUE wire to one side of the "REMOTE" switch and connect the other side to either the ORANGE/BLACK wire for "SPA" operation or the BLACK/ORANGE wire for "POOL" operation.

6. Attach wire nut on unused wire to the "Remote Interface Harness."

7. Install the "7-Pin Remote Interface Harness" to the P8 connector and turn power “On” to the heater.

See instructions on previous page to activate the remote control.

3-Wire Remote Control Using Three-Position Switch (Pool-Off-Spa, or Low-Off-High)

This application assumes that both heating functions (pool and spa) are required.

1. Turn on power to the heater.

2. Push the mode button to the "POOL" or "SPA" mode and set the desired temperature for each (eg. 80°F for Pool and 102°F for Spa).

3. Turn the mode button to "OFF" and remove power from the heater.

4. On the "Remote Interface Harness" connect the BLUE wire to one side of the "REMOTE" switch and connect the ORANGE/BLACK wire for "SPA" operation and the BLACK/ORANGE wire for the "POOL" operation.

5. Install the "Remote Interface Harness" to the P8 connector and turn power "ON" to the heater.

See instructions on previous page to activate the remote control.

Wire Nut - BLK/ORN To Pool (COMM)

ORN/BLK - To Spa (COMM)

BLU - 24VAC

BLK/ORN - To Pool (COMM)

ORN/BLK - To Spa (COMM)

BLU - 24VAC

P8 Connector

WATER PRESSURE SWITCH

The water pressure switch, or heater actuator, ensures that the heater operates only when the filter pump is in operation. It is located on the inlet/outlet header. It is factory set at 1.75 PSI for deck-level installations. When the heater is located below the level of the spa or pool, it may be necessary to adjust the pressure switch to compensate for the no-flow static head. If it is necessary to adjust the water pressure switch, utilize the following procedure:

WATER PRESSURE SWITCH ADJUSTMENT

1. With pump and heater on, turn adjustment knob clockwise until a click is heard from the gas valve.

2. Turn adjustment knob counter-clockwise 1/4 turn.

3. Turn pump off and on several times. Heater should shut off immediately. If it does not, repeat the above steps.

NOTE:

If heater is installed outside of the limits shown, a higher pressure rated (11 psi) switch may be used. A flow switch, mounted and wired adjacent to the heater, may be used in place of the factory-mounted pressure switch. See Parts List (pg. 51) for 11 psi water pressure switch.

TWO-SPEED PUMPS

In some cases, the flow on the low-speed is insufficient to operate the heater. This is apparent when the water pressure switch cannot be further adjusted or if the heater makes banging noises or shuts off on high limit. In these cases, the pump must be run at high speed when heating the water.

PRESSURE SWITCH ADJUSTMENT RANGE

CAUTION:

Do not operate the heater without the function of a properly adjusted water pressure switch or flow switch.

FLAME ROLL-OUT SAFETY SWITCH

Atmospheric heaters are equipped with a thermal cutoff device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is a "singleuse" type fusible link or thermal fuse, that must be replaced when disabled by an over-temperature condition, caused by excessive restriction in the heat exchanger flue passage.

HIGH LIMITS

The heater is equipped with two automatic high limits. Both are located in the inlet/outlet header. Both are set to open at 135°F.

NOTE:

An erratic high limit is often characteristic of an internal heat exchanger problem, e.g. scale build-up, defective bypass. Refer to Troubleshooting section (on pg. 42).

HIGH LIMIT REMOVAL

1. Shut off main elec-

trical power switch to heater.

2. Remove inlet/outlet

inspection panel.

3. Remove defective

high limit and replace with a new high limit.

4. Replace inspection

panel.

PILOT SAFETY - Millivolt Models

Heaters equipped with the standing pilot (millivolt system) have pilot generators which act as a safety device to shut off the flow of gas to the main burners and the pilot burner in case the pilot flame is extinguished. The pilot burner must be manually re-lighted to place the heater in operation again. Refer to the lighting instructions provided on the heater label.

PILOT SAFETY - Digital Models

The heater employs a pilot safety which closes the main gas valve within 8/10ths of a second whenever the pilot flame is interrupted. The pilot flame is automatically lit when the device is powered. The heater performs its own safety check and opens the main valve only after the pilot is proven to be lit.

Fig.# 9440

Fig.# 9439

Fig.# 9438

5 FT. MAX

POOL OR SPA

MAY REQUIRE ADJUSTMENT

FOR LOWER PRESSURE

MAY REQUIRE ADJUSTMENT

FOR HIGHER PRESSURE

5 FT. MAX

Fig.# 8152.3

PILOT REMOVAL AND CLEANING

1. Disconnect pilot tubing and wires from gas valve.

2. Remove pilot assembly from burner tray.

3. Remove pilot from bracket.

4. Remove pilot orifice and air opening (Honeywell MV unit only), and clean with wire or small brush.

CAUTION! Do not enlarge hole in pilot orifice.

5. Reverse above procedure to reinstall.

Pilot Pilot

Air Opening

Orifice

Fig. # 8045.1 Fig. # 8102.0

HEAT EXCHANGER REMOVAL

1. Shut water, gas and electricity off, close valves and relieve pressure, then remove relief valve. Remove side inspection panels.

2. Remove top jacket holding screws.

3. Remove rear top panel.

4. Remove screws mounting the rain shield to the rear panel. Also remove the screws that mount the rain shield to the sway brace. Remove rain shield.

5. Remove the four (4) screws holding down the flue collector. Remove the flue collector.

6. Disconnect flange nuts on Inlet/Outlet header, loosen union(s) at gas pipe and slide heater away from piping.

7. Lift heat exchanger straight up using caution not to damage refractory.

8. Reverse above procedure to reinstall. Make sure the insulation strips are properly replaced on top of the refractory retainer.

BURNER TRAY REMOVAL -

ATMOSPHERIC MODELS

1. Shut off main electrical power switch to heater.

2. Shut off gas upstream of heater.

3. Remove front door.

4. Disconnect gas line from gas valve.

5. Remove (2) screws that mount burner tray to unit, and (2) screws that secure gas valve to jacket.

6. Disconnect wires that terminate at gas valve.

7. Disconnect hi-tension wire from PC board.

8. Slide out burner tray.

9. Reverse above procedure to reinstall.

GAS VALVE REMOVAL -

ATMOSPHERIC MODELS

1. Shut off gas supply to the heater. Remove gas piping to gas valve inlet.

2. Disconnect wires, pilot tubing and bleed line, if required.

3. Remove burner tray from heater.

4. Turn vertical gas pipe from manifold slightly and unscrew gas valve.

5. Reverse above procedure to reinstall.

MAIN BURNER AND ORIFICE REMOVAL -

ATMOSPHERIC MODELS

1. Remove burner tray.

2. Remove screws and burner hold-down bracket.

NOTE: If the heat exchanger is sooted badly, the burner hold-down bracket and spacer can become distorted from direct-flame impingement and this usually necessitates replacement of these parts.

3. Lift burners from slotted spacers and slide from orifices. Clean with a wire brush.

4. Orifices usually do not need to be replaced. To clean, run either copper wire or wood toothpick through orifice. Do not enlarge hole. To remove orifice, use a socket wrench and remove from manifold. DO NOT overtighten when reinstalling.

HONEYWELL MILLIVOLT

PILOT

ROBERTSHAW MILLIVOLT

PILOT

GAS VALVE

PILOT

GAS ORIFICE

BURNER

HOLD-DOWN

BRACKET

BURNER

TUBE CLEANING PROCEDURE

Establish a regular inspection schedule, the frequency depending on the local water conditions and the severity of service. Do not let the tubes clog up solidly. Clean out deposits over 1/16" in thickness.

The heater may be cleaned from the return header side, without breaking pipe connections. It is preferable, however, to remove both headers for better visibility through the tubes and to be sure the ground-up lime dust does not get into the system.

Note that you do not remove the top panel or the heater exchanger, generally.

After reaming, mount the wire brush in place of the auger and clean out debris remaining in the tubes.

Another method is to remove the heat exchanger, ream tubes and immerse heat exchanger in non-inhibited de-scale solvent for severe scale build-up.

DESOOTING PROCEDURE

Soot will clog areas between fins and cause eventual tube failure. Any sign of soot at the base of the burners or around the outer jacket indicates a need for cleaning.

1. Remove top and flue collector from cabinet.

2. Remove "V" baffles from heat exchanger.

3. Remove burner tray. (See pg. 38).

4. Remove heat exchanger from the heater and wash with a garden hose, making sure soot is removed from spaces between fins.

5. Reverse above procedure to reinstall.

NOTE:

In extreme cases it may be necessary to do

steam cleaning at the local car wash. DO NOT WIRE

BRUSH.

COMBUSTION CHAMBER REMOVAL

To remove combustion chamber, you must first have removed the heat exchanger.

REFRACTORY PANELS - TOP VIEW

Extension Pieces (2) Auger with Carbide Tip Wire Brush

Fig.# 8154.0

WARNING:

SOOT IS COMBUSTIBLE. EXERCISE

EXTREME CARE.

IMMERSION WELL REPLACEMENT

(Millivolt and ASME)

1. Shut off water to heater and drain heat exchanger.

2. Remove access panel on water connection side.

3. Remove old immersion well with bushing and sleeve.

4. Install replacement well in header.

NOTE:

Installation in polymer header should be hand tight plus 1/2 turn.

Well Assembly

Fig. #2010

UNITHERM GOVERNOR (U.G.) REPLACEMENT

1. Shut water, gas and electricity off, close valves and relieve pressure.

2. Drain heat exchanger.

3. Remove retainer plug located next to the outlet pipe connection.

4. Unsnap old U.G. to remove from retainer plug. Snap in new U.G.

5. Reinstall retainer plug, taking care to lubricate gasket with a non-petroleum based grease such as AquaLube.

Retainer Plug

U.G.

Spring

Gasket

Fig. #2011

To test the operation of the Unitherm Governor, place in hot water (over 110°F) and watch for movement against spring. If there is no movement, replace unit.

Atmospheric Heaters

Low NOx Heaters

The Low NOx pool heaters are certified and tested under the ANSI Z21.56/CSA 4.7 Standard for GasFired Pool Heaters.

The heater should be installed to meet all local codes, and the latest editions of the National Fuel Gas Code Z223.1 and the National Electrical Code, ANSI/NFPA

70.

OPERATION

On call for heat, the ignition system, consisting of an electronic spark module, gas valve and pilot system, is energized. Providing the pilot is proven, the blower will start running, the main gas valve will open and the heater will operate. When the operating control is satisfied the heater will shut down.

START-UP PROCEDURES

1. Turn on power to the heater with gas supply off.

2. Turn on gas supply.

3. Set controller to call for heat.

4. System should start as follows: a. Spark will turn on, pilot gas valve will open, and the blower will begin running. b. Once the blower provides pressure, the main gas valve will open. c. Heater will operate until call for heat is satisfied.

BLOWER ADJUSTMENT

This Low NOx pool heater is equipped with a combustion air plate (baffle) mounted on the air intake to the combustion air blower. The baffle has a hole that is utilized to control the air inlet to the blower.

When the combustion air setting is proper

, there will be some lifting of the flames on some areas of the burner deck under cold-start conditions. After about five minutes of operation, the flames should settle down and blue tips should become visible. Lifting of flames beyond five minutes would indicate too much combustion air.

VISUAL INSPECTION

Flames can be observed through the slot opening above the plenum. Flame color is blue and evenly spread on the top surface of the burner. At least every three months a visual inspection should be made of the burners.

ELECTRICAL

Be sure that electrical service to the heater has proper overload fuse or circuit breaker protection, wire size and connections which comply with all applicable codes.

FLAME ROLL-OUT SAFETY SWITCH

Low NOx heaters are equipped with (2) thermal cut-off devices to prevent flame roll-out in the event the heat exchanger becomes blocked. One is a "manual reset" type roll-out switch that must be reset by a service technician after any over-temperature conditions have been fixed. The second is an “auto reset” type roll-out switch that resets itself after a few minutes. Excessive restriction in the heat exchanger flue passage may cause any of the two switchs to disable the heater.

Fig.# 9412

LOW NOx POOL HEATERS

NOTE:

Door must be in place for proper operation.

Manual Reset

Switch

Auto Reset

Switch

Fig.# 9439

LOW NOx HEATERS (CONTINUED)

BURNER TRAY REMOVAL

1. Shut off main electrical power switch to heater.

2. Shut off gas upstream of heater.

3. Remove front door.

4. Disconnect gas line from gas valve.

5. Remove (2) screws that mount burner tray to the base of the unit, and (2) screws that mount the blower box to the burner tray, and (1) screw that secures the anti-rotation bracket to the heater.

6. Disconnect wires that terminate at gas valve.

7. Unscrew (4) screws that secure the control box.

8. Disconnect pilot wire from the pilot assembly.

9. Disconnect wire connector from the combustion blower.

10. Carefully slide out the burner tray assembly.

11. Reverse above procedure to reinstall.

GAS VALVE REMOVAL

1. Remove burner tray, following above procedure.

2. Disconnect, pilot tubing from gas valve.

3. Remove (2) screws that mount anti-rotation bracket to the burner tray.

4. Turn vertical gas pipe from manifold slightly and unscrew gas valve.

5. Reverse above procedure to reinstall.

PILOT REMOVAL

1. Disconnect pilot tubing from gas valve.

2. Remove the pilot wire from the pilot assembly.

3. Remove (2) screws that mount the pilot assembly to the burner tray.

4. Pull the pilot assembly downwards and outwards.

5. Reverse above procedure to reinstall.

COMBUSTION BLOWER REMOVAL

1. Remove the (2) screws that secure the blower box to the burner tray.

2. Remove (2) screws that mount the blower box to the base of the heater.

3. Disconnect wire connector from the combustion blower.

4. Carefully remove blower box with combustion blower.

5. Remove (2) screws that secure combustion blower to blower box.

6. Reverse above procedure to reinstall.

Low NOx Horizontal Pilot

Low NOx Burner Tray

MAIN BURNER AND ORIFICE REMOVAL

1. Remove burner tray, following above procedure.

2. Remove pilot. See pilot removal procedure.

3. Remove (8) total screws from the burner holddown brackets, front and rear of tray.

4. Remove (8) total screws from the left and right sides of the manifold assembly. Detach the air/gas manifold assembly from the burner tray assembly.

5. Remove burners by raising them straight up off the rear end slots.

6. Use a long 9/16” socket wrench to remove orifice from the gas manifold.

7. Reverse above procedure to reinstall.

MOUNTED INLET SIDE

BAFFLE

PILOT

LOW NOx

BURNER

HOLD-DOWN

BRACKET

COMBUSTION AIR BLOWER

GAS ORIFICE

GAS VALVE

MECHANICAL

IMPORTANT NOTICE These instructions are intended for the use of qualified personnel who are specifically trained and experienced in the

installation of this type of heating equipment and related system components. Installation and service personnel may be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to these instructions.

PROBLEM CAUSE SOLUTION

Harmonics, or whining noise U.G. inoperative................................... Check movement by putting in hot water (110°F or higher).

If no movement, replace.

*Debris or restriction in system............ Locate the restriction and remove. Flush system and clean.

*Debris in gas line................................ Remove debris or blow out gas line.

Low flow............................................... Scale forming in heat exchanger - clean heat exchanger and

check pool pH and total alkalinity.

Heater going on and off Dirty filter.............................................. Clean or replace filter.

continuously Low water level in pool........................ Raise water level.

External bypass setting out of

adjustment............................................ Adjust bypass.

*Pressure switch out of adjustment..... Adjust pressure switch.

Liming or scale forming in Pool water............................................ See Water Chemistry on page 2.

exchanger Bypassing too much water................... Inspect bypass for movement, if no movement, replace.

U.G. not functioning............................. Replace if no movement when heated.

Sooting High flow rates..................................... Reduce by adding manual bypass valve.

Adjust manual bypass valve until heater outlet water

temperature is between 105°F and 110°F.

U.G. Inoperative................................... Check movement by putting in hot water (110°F or higher).

If no movement, replace.

*Air starvation....................................... Refer to installation instructions.

*Improper venting................................ Follow recommended installation instructions.

*Insects or debris clogging

burner intake ports............................. Clean burners.

Pilot outage Low gas pressure................................ Adjust gas pressure.

Restricted pilot..................................... Clean pilot.

Weak pilot generator............................ Replace pilot.

Yellow lazy flame Low gas pressure................................ Adjust gas pressure.

*Insects or debris clogging

burner intake ports............................... Clean burners.

Outer jacket very hot *Broken refractory caused by (paint blistered) shipping damage or improper

combustion......................................... Replace refractory panels.

Excessive sooting of heat exchanger.. Determine cause of sooting & correct.

Takes too long to heat Under-sized heater............................... Calculate heating capacity of heater:

pool or spa Htr. output(BTUH)

Pool gallonage x 8.33 or refer to heater sizing chart.

This does not take into account heat loss due to weather.

Filter not running long enough............. Reset time clock.

Dirty filter.............................................. Clean filter.

Gas line or meter undersized............... Refer to installation instructions.

Leaking at well Overacid............................................... Replace well and maintain proper water chemistry.

Leaking at heat exchanger Overacid............................................... Replace heat exchanger and maintain proper water chemistry.

Gasket brittle and leaking - Heater running after pump shuts off.... See Pressure Switch Adjustment.

(overheated) Refractory damage.............................. Replace refractory.

Sooted heater....................................... Determine cause of sooting and correct.

Combustion fan not running Fan relay.............................................. Replace fan relay.

Fan........................................................ Loose connection or failed motor.

Burned motor ...................................... Incorrect wiring, replace blower.

Air pressure switch............................... Replace air switch.

SECTION 5 - TROUBLESHOOTING

* Indicates symptom which usually occurs on initial start-up.

ELECTRICAL - STANDING PILOT MILLIVOLT

POOL OR SPA HEATER

ELECTRICAL CHECK WITH MILLIVOLT GAS VALVE

CAUTION: For qualified service personnel only.

1. Filter must be on with adequate water flow through heater.

2. Gas valve must be in "ON" position. Thermostat set higher than pool water temperature.

3. Jumpers are for temporary check only. If left in place, they could cause the heater to burn up.

Raw Output (700mV± 100) Pilot generator disconnected from valve (knob must be held down to keep pilot on). White – Negative Red + Positive

Pilot Load (500mV± 100) Pilot generator connected to valve-Power applied to pilot solenoid. TP(Thermopile-Robertshaw) PP(Power Pile-Honeywell) TH TP – Common TH PP – Common

Main Valve Load (200mV± 100) Control/Limit circuit closed (All switches "ON") TP(Thermopile-Robertshaw) PP(Power Pile-Honeywell) TH TP – Common TH PP – Common

Light pilot

If pilot burner remains lit

Jump across both "TH"

wires on gas valves

If main burner fires,

remove jumper

Jump across pressure

If main burner fires,

remove jumper

Clean filter

Check for adequate water

flow from filter

Replace pressure switch

If main burner does not

switch terminals

fire, remove jumper

If main burner does not

fire, remove jumper

Jump across thermostat

If main burner fires,

remove jumper

Replace thermostat

If pilot burner goes out

when main burner lights

or when gas valve knob

Replace

gas

valve

If pilot burner stays on

Problem is a wire or

If main burner does

NOT fire...

Jump across each

high limit and remove

jumper

Replace high limit that

caused heater to fire

Remove both "TH"

wires from gas valve.

component short to

cabinet or low gas

pressure

is released

Relight pilot

If pilot burner

does not light

Check gas supply, gas

line size, gas pressure.

Also check for insects

or debris in pilot output

If burner does not remain

lit, attach millivolt meter

and read pilot output

If above 500mV,

replace gas valve

If below 500mV, check

gas pressure. Also check

for insects or debris in

the pilot burner

If output is still low,

replace pilot generator

START

TURN GAS SUPPLY OFF.

TURN THERMOSTAT

(CONTROLLER) TO CALL

FOR HEAT

POWER TO PC BOARD?

(24 V NOMINAL)

YES

SPARK ACROSS

IGNITER/SENSOR GAP?

YES

TURN GAS SUPPLY ON

PILOT BURNER LIGHTS?

YES

MAIN BURNER LIGHTS?

YES

SYSTEM RUNS UNTIL

CALL FOR HEAT ENDS?

YES

CALL FOR HEAT ENDS

SYSTEM SHUTS OFF?

YES

TROUBLESHOOTING

ENDS

NOTE: Before troubleshooting, familiarize yourself with the start-up and check-out procedure.

Check line voltage power, low voltage transformer, limit controller, thermostat (controller) and wiring.

Pull ignition lead and check spark at PC board. Spark Okay? YES NO

• Check ignition cable, ground wiring, ceramic insulator and gap, and correct.

• Check boot of the ignition cable for signs of melting or buckling. Take protective action to shield cable and boot from excessive temperatures.

• Check that all manual gas valves are open, supply tubing and pressures are good, and pilot burner orifice is not blocked.

• Check electrical connections between PC board and pilot operator on gas control.

• Check for 24 VAC across PV-MV/PV terminals on PC board. If voltage is okay, replace gas control; if not, replace PC board.

NOTE: If PC board goes into lockout, reset system. Lockout is used on L.P.G. models.

• Check for 24 VAC across MV-MV/PV terminals. If no voltage, replace module.

• Check electrical connections between PC board and gas control. If okay, replace

gas valve or gas control operator, i.e. pilot gas valve, flow switch etc.

NOTE: IF PC board goes into lockout, reset system.

• Check continuity of ignition cable and ground wire.

NOTE: If ground is poor or erratic, shutdowns may occur occasionally even though

operation is normal at the time of checkout.

• Check that pilot flame covers flame rod and is steady and blue.

• If checks are okay, replace PC board.

• Check for proper thermostat (controller) operation.

• Remove MV lead at module; if valve closes, recheck temperature controller and wiring; if not, replace gas valve.

ELECTRICAL - ELECTRONIC IGNITION IID

WARNING HIGH VOLTAGE

For qualified technicians ONLY

NOTE: Some heaters may be equipped with an ignition module that shuts off pilot gas if pilot fails to light. To reset, interrupt power to heater.

Replace the PC board.

DIGITAL CONTROL LOGIC - FLOW CHART

Power On

Is the water

temperature displayed?

YES

• Check On/Off switch (under lid on control panel)

• Check for 120/240 volts to the transformer (time clock, circuit breaker, wire connections)

• Check for 24 volts to Circuit Board (P6 connector)

Push MODE

switch to select

"Pool" or "SPA"

Push Temp

arrow to scroll to

desired temperature

Water temperature

and set

temperature

displayed?

YES

CFH

(call for heat) will

display briefly

SPK

(spark) will display

until pilot is lit

up to 2

minutes maximum

Flame icon displayed

and flashing?

(pilot lit and rectified)

REM and Water Temperature

displayed and flashing

(a remote control is controlling the heater)

Note: Disconnect the remote by turning the

remote function off. See page 35 for instructions.

Is SERVICE displayed and flashing?

YES

Diagnostic Readouts

"SNS" - Temperature sensor out of range (replace sensor)

Sensor Failure

Inspect thermister, wires, and connector at Terminal P1 Check resistance value of the thermister. Reference to chart below. Replace thermister if not within 10% of values shown below. If okay, replace Circuit Board.

Sensor resistance at various temperatures

Temp Degrees F 40 50 60 70 80 90 100 106 Resistance (k) 261.1 199.0 153.1 118.8 93.0 73.3 58.3 51.0

If okay, replace Circuit Board

PRS Pressure switch. Verify water flow and pressure

CLEAN FILTER / STRAINER - backwash if neccessary.

HL1 High limit switch. Verify water flow. Inspect internal HL2 Thermostat (Unitherm Governor) and bypass valve.

ROL Rollout Sensor - Check for blocked heat exchanger and soot.

Atmospheric Units - Replace fusible link. Low NOx Units - Press manual reset button.

CLK Fireman or Remote switch connected to safety loop is in the

OFF mode.

VNT Vent switch open. Check connections to the board.

If extractor installed, troubleshoot extractor.

YES

Heater Fired?

YES

END

IGN Ignition control failure. Check power at PV.

PLT Pilot failure. Check spark (bad ignition circuit or hi-tension wire).

Verify gas to the heater. Verify valve operation (gas present at tube fitting). Verify clean pilot orifice and clearance from igniter to ground hood. If pilot is lit, verify that the flame is rectified (the spark will be off)

Verify power at MV on P-4 Terminal on digital circuit board.

Verify power to valve MV voltage. (Replace valve.)

SECTION 6 - REPLACEMENT PARTS

NOTE: To supply you with the correct part, it is impor-

tant that you supply the heater model number, serial number and type of gas when applicable.

Any part returned for replacement under standard company warranties must be properly tagged with a return parts tag, completely filled in with the heater serial number, model number, etc., and shipped to the Company freight prepaid.

If determined defective by the Company and within warranty, a like part or equal substitution will be returned, freight collect. Credit will not be issued.

MANUFACTURER:

2151 EASTMAN AVENUE OXNARD, CA 93030

ATMOSPHERIC HEATERS

3-V

1-S

8-S

10-M

9-M

1-V

5-C

4-C

11-S

17-HM

4-V

2-V

12-HM

3-HP

14-M

4-S

14-M

6-HP

3-R

6-S

4-HP

13-S

2-S

5-HP

7-HP

6-HP

12-S

7-S

2-M

3-S

4-M

13-M

12-M

1-G

2-J

11-M

10-S

2-B

1-B

5-M

5-B

4-B

3-B

16-M

5-S

16-M

2-R

4-S

1-R

1-J

LOW NOx HEATERS

3-V

1-S

8-S

1-V

2-J

6-M

4-C

11-S

17-HM

9-M

4-V

2-V

12-HM

3-J

3-HP

4-S

9-M

6-HP

6-S

3-R

4-HP

13-S

2-S

5-HP

7-HP

6-HP

12-S

7-S

2-S

4-S

3-S

8-M

1-G

4-B

7-M

3-B

10-S

2-B

2-M

1-B

7-B

5-B

6-C

13-M

6-B

12-M

10-M

5-S

12-M

1-R

1-J

1-M

5-HM

6-HM

2-S

5-C 14-HM

13-HM

2-HM

9-S

16-HM

15-HM

3-M

(OPTIONAL)

2-C

3-C

7-HM

3-HM

17-HM

3-M 5-C

(OPTIONAL)

18-HP

19-HP

8-HP

15-HP

13-HP

14-HP

17-HP

1-M

1-C

4-HM

11-HP

12-HP

2-HP

POLYMER IN/OUT HEADER AND ACCESSORIES

16-HP

10-HP

12-HM

4-S

9-HM

2-P

7-P

9-P

HONEYWELL IID ATMOSPHERIC PILOT

8-HM

10-HM

11-HM

8-P

6-P

3-P

9-P

HONEYWELL MILLIVOLT PILOT

1-P

5-P

2-P

4-P

IID LOW NOx PILOT

ATMOSPHERIC HEATERS

CALL

OUT DESCRIPTION 206A 266A 336A 406A

B BURNER TRAY

1-B Burner Tray w/Burners (sea level)* 010391F 010392F 010393F 010394F

Burner Tray w/o Burners (sea level)* 010395F 010396F 010397F 010398F Burner Tray w/Gas Valve Nat Millivolt 010399F 010400F 010401F 010402F Burner Tray w/Gas Valve Pro Millivolt 010403F 010404F 010405F 010406F Burner Tray w/Gas Valve Nat IID 010407F 010408F 010409F 010410F

Burner Tray w/Gas Valve Pro IID 010411F 010412F 010413F 010414F 2-B Burner Spacer/Hold Down Kit 010415F 010416F 010417F 010418F 3-B Burner 301210/13 301210/18 301210/22 301210/27 4-B Burner Orifice Nat. #49 (Sea Level)* 350078F/13 350078F/18 350078F/22 350078F/27

Burner Orifice Pro. #57 (Sea Level)* 350083F/13 350083F/18 350083F/22 350083F/27 5-B Burner Tray w/o Manifold w/o burners 010421F 010422F 010423F 010424F

C CONTROLS

1-C Thermostat Auto Reset 135 Deg Surface Mount 006725F 006725F 006725F 006725F 2-C AGS 135º (Auto Gas Shut-Off) - Red Epoxy 600892B 600892B 600892B 600892B 3-C High Limit 140º - Black Epoxy 600893B 600893B 600893B 600893B 4-C P. C. Board/Control IID Units 010253F 010253F 010253F 010253F 5-C Thermostat Control MV Units Mechanical 003346F 003346F 003346F 003346F 6-C Temperature Sensor IID Units 009577F 009577F 009577F 009577F

G GAS VALVE

1-G Combination Valve - Nat. MV 003898F 003898F 003898F 003898F

Combination Valve - Pro. MV 003899F 003899F 003899F 003899F

Combination Valve - Nat. IID 003900F 003900F 003900F 003900F

Combination Valve - Pro. IID 004306F 004306F 004306F 004306F

HP HEAT EXCHANGER - POLYMER

1-HP Heat Exchange Assy Copper 010043F 010044F 010045F 010046F

Heat Exchange Assy Cupro Nickel 010356F 010357F 010358F 010359F 2-HP Inlet/Outlet Header Complete 006827F 006827F 006827F 006827F

Inlet/Outlet Header (Includes 6-HP) 006706F 006706F 006706F 006706F 3-HP Return Header (Includes 6-HP) 006707F 006707F 006707F 006707F 4-HP Tube Bundle Copper ** 010059F 010060F 010061F 010062F

Tube Bundle Cupro Nickel ** 010364F 010365F 010366F 010367F 5-HP Baffle 010038F 005261F 010040F 010041F 6-HP Flange Nut Kit 008259F 008259F 008259F 008259F 7-HP O Ring Gasket (2) 006713F 006713F 006713F 006713F 8-HP Sensor Adapter Digital Electronic 006714F 006714F 006714F 006714F

Sensor Well Millivolt 006805F 006805F 006805F 006805F 9-HP Bypass Kit 006715F 006715F 006715F 006715F 10-HP Bypass Valve 006716F 006716F 006716F 006716F 11- HP Bypass Dam / Shaft 006717F 006717F 006717F 006717F 12-HP Bypass Spring (All Sizes Included) 006718F 006718F 006718F 006718F 13-HP Unitherm Governor 006719F 006719F 006719F 006719F 14-HP Unitherm Governor Plug 006720F 006720F 006720F 006720F 15-HP Drain Plug 006721F 006721F 006721F 006721F 16-HP Inlet/Outlet Header Dam 006722F 006722F 006722F 006722F 17-HP 2" PVC Connector & Nut (2) 006723F 006723F 006723F 006723F 18-HP O Ring (2) 006724F 006724F 006724F 006724F 19-HP Stainless Steel Baffle 006826F 006826F 006826F 006826F *FOR INSTALLATION AT OVER 2,000 FEET ABOVE SEA LEVEL, DERATE 4% PER I,000 FEET ABOVE SEA LEVEL. **WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and inspect the b

pass assembly. Failure to do so could cause premature failure of this replacement part.

CALL

OUT DESCRIPTION 206A 266A 336A 406A

HM HEAT EXCHANGER - METAL

1-HM Heat Exchange Assy.Copper ASME CI 010051F 006727F 010053F 010054F

Heat Exchange Assy.Cupro Nickel ASME CI 010360F 010361F 010362F 010363F 2-HM Inlet/Outlet Header ASME CI 006730F 006730F 006730F 006730F 15-HM Inlet & Outlet Flange 003766F 003766F 003766F 003766F 16-HM Flange Gasket 1 1/2" Connections 062236B 062236B 062236B 062236B

Flange Gasket 2" Connections 800080B 800080B 800080B 800080B 3-HM Return Header ASME CI 006731F 006731F 006731F 006731F 4-HM Tube Bundle Copper ASME * 010055F 006733F 010057F 010058F

Tube Bundle Cupro Nickel ASME * 010368F 010369F 010370F 010371F 5-HM Baffle 010038F 005261F 010040F 010041F 6-HM Stud Bolt Kit 007870F 007870F 007870F 007870F 7-HM Header Gasket (9) 800014B 800014B 800014B 800014B 8-HM Unitherm Governor 062234B 062234B 062234B 062234B 9-HM U.G. Retainer Spring 850254 850254 850254 850254 10-HM Bypass Valve 062235B 062235B 062235B 062235B 11-HM Bypass Spring 850252 850253 850253 850253 12-HM Drain Valve 500719 500719 500719 500719 13-HM Sensor Well 003765F 003765F 003765F 003765F 14-HM Well Retaining Clip 300203 300203 300203 300203 17-HM Rear Drain Plug & Cover 005264F 005264F 005264F 005264F

J CONTROL BOX

1-J Transformer 120/240/24V 006736F 006736F 006736F 006736F 2-J Rocker Switch 009493F 009493F 009493F 009493F

M MISCELLANEOUS COMPONENTS

1-M Pressure Switch 1.75 PSI 006737F 006737F 006737F 006737F

Pressure

Switch 11 PSI S

ecial-See Water Pressure Switch Adj.009133F 009133F 009133F 009133F

2-M Thermostat Knob 009499F 009499F 009499F 009499F 3-M Thermostat Shaft MV 800307 800307 800307 800307 4-M Knobstop 006886F 006886F 006886F 006886F 5-M Thermal Fuse 005899F 005899F 005899F 005899F 6-M PRV 125 PSI (Optional) 008091F 007224F 007224F 007224F 7-M Deliming Kit 052871F 052871F 052871F 052871F 8-M Wire/Harness Millivolt 010386F 010386F 010386F 010386F

Wire/Harness IID 009490F 009490F 009490F 009490F 9-M Control Bezel MV (Includes Dial Decal) 009489F 009489F 009489F 009489F 10-M Dial Decal MV 009858F 009858F 009858F 009858F 11-M Control Bezel IID (Includes Switch Decal) 009491F 009491F 009491F 009491F 12-M Switch/Decal-Membrane 009492F 009492F 009492F 009492F 13-M Control Bezel Cover 009487F 009487F 009487F 009487F 14-M Gasket Insulation (Swaybrace & Jacket Top) 010350F 010350F 010350F 010350F 15-M Touch-u

Paint (Green

)

750125 750125 750125 750125

Touch-u

Paint (Dark Gra

750126 750126 750126 750126

16-M Tie Down Bracket

(Op

tional

)

011636 011636 011636 011636

P PILOT

1-P Pilot Nat. MV 600525B 600525B 600525B 600525B

Pilot Pro. MV 600575B 600575B 600575B 600575B 2-P

Pilot Nat & Pro IID 002003F 002003F 002003F 002003F

3-P Pilot Orifice Nat. MV 003901F 003901F 003901F 003901F

Pilot Orifice Pro. MV 003902F 003902F 003902F 003902F 4-P Pilot Orifice Nat. IID .020 003903F 003903F 003903F 003903F

Pilot Orifice Pro. IID .012 004308F 004308F 004308F 004308F 5-P Pilot Generator MV 600019B 600019B 600019B 600019B 6-P Pilot MTG Bracket MV 010352F 010352F 010352F 010352F 7-P Pilot Mounting Bracket IID 306692 306692 306692 306692 8-P Lighter Tube (MV Units Only) 062996 062996 062996 062996 9-P Pilot Tube 004078F 004078F 004078F 004078F 10-P Hi Tension Wire IID with Pilot Electrode 007864F 007864F 007864F 007864F 11-P Pilot Shield 010351F 010351F 010351F 010351F

R REFRACTORY

1-R Refractory Common Lt & Rt 010088F 010088F 010088F 010088F 2-R Refractory Uncommon (Front & Rear) 010089F 010090F 010091F 010092F 3-R Refractory Retainer Kit 010387F 010388F 010389F 010390F *WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and inspect the bypass assembly. Failure to do so could cause premature failure of this replacement part.

ATMOSPHERIC HEATERS

y by

ATMOSPHERIC HEATERS

CALL

OUT DESCRIPTION 206A 266A 336A 406A

S SHEETMETAL

1-S Jacket Top (Louvered) 010047F 010048F 010049F 010050F 2-S Flue Collector (Units with Polymer Header) 010071F 010072F 010073F 010074F

3-S Door Assy.

4-S Access Panel Set (3 Pcs Units with Polymer Header) 010311F 010311F 010311F 010311F

5-S Jacket Side Panel Right 010376F 010376F 010376F 010376F 6-S Jacket Side Panel Left 010377F 010377F 010377F 010377F 7-S Jacket Rear Panel 010372F 010373F 010374F 010375F 8-S Poolstat Cover/Lock 009505 009505 009505 009505 9-S High Limit Cover 010319F 010319F 010319F 010319F 10-S Base Heat Shield 010320F 010320F 010320F 010320F 11-S Up Front Control Panel 010321F 010322F 010323F 010324F 12-S High Limit Shield 010342F 010342F 010342F 010342F 13-S Weather Shield 010325F 010326F 010327F 010328F

1-V Indoor Stack Kit (Includes inner adapter panel) 009838 009839 009840 009841

2-V Stack Adapter 010330F 010331F 010332F 010333F 4-V Outer Stack Adapter 011461F 011462F 011463F 011464F 3-V "Pagoda" Top 010334 010335 010336 010337

Atmospheric CONVERSION KITS* 206A 266A 336A 406A

Gas Conversions Nat. to Pro. MV Pilot 004690B 004690B 004692B 004692B Pro. to Nat. MV Pilot 010419F 010419F 010420F 010420F Nat. to Pro. IID Pilot N/A N/A N/A N/A Pro. to Nat. IID Pilot N/A N/A N/A N/A

Flue Collector (Units with Metal Header) 010075F 010076F 010077F 010078F

Raypak 010378F 010379F 010380F 010381F Rheem 010382F 010383F 010384F 010385F Ruud 010382F 010383F 010384F 010385F

Access Panel Set (3 Pcs. Units with Metal Header) 010312F 010312F 010312F 010312F

V VENTING

Outdoor Stack Kit (Includes inner adapter panel) 009834 009835 009836 009837

* Gas conversions are to be done onl

a qualified agency.

LOW NOx HEATERS

CALL

OUT DESCRIPTION 207A 267A 337A 407A

BB BURNER TRAY

1-B Burner Tray w/Burners (0-5000) 010343F 010344F 010345F 010346F

2-B Burner Hold Down Kit 010254F 010255F 010256F 010257F 3-B Burner 310732/3 310732/4 310732/5 310732/6 4-B Burner Orifice Nat. #26 (0-5000)* 351510/3 351510/4 351510/5 351510/6

5-B Blower 010042F 010042F 010042F 010042F 7-B Cooling Fan 010871F 010871F 010871F 010871F 6-B Combustion Air Orifice Plate 010338F 010339F 010340F 010341F

1-C Thermostat Auto Reset 135 Deg Surface Mount 006725F 006725F 006725F 006725F 2-C AGS 135° (Auto Gas Shut-Off) - Red Epoxy 600892B 600892B 600892B 600892B 3-C High Limit 140° - Black Epoxy 600893B 600893B 600893B 600893B 4-C P. C. Board/Control 010253F 010253F 010253F 010253F 5-C Temperature Sensor 009577F 009577F 009577F 009577F 6-C Blower Pressure Switch 008062F 008135F 010354F 010355F

1-G Combination Valve - Gas On/Off -Nat 010329F 010329F 010329F 010329F

1-HP Heat Exchange Assy Copper 010043F 010044F 010045F 010046F

2-HP Inlet/Outlet Header Complete 006827F 006827F 006827F 006827F

3-HP Return Header (Includes 6-HP) 006707F 006707F 006707F 006707F 4-HP Tube Bundle Copper ** 010059F 010060F 010061F 010062F

5-HP Baffle 010038F 005261F 010040F 010041F 6-HP Flange Nut Kit 008259F 008259F 008259F 008259F 7-HP O Ring Gasket (2) 006713F 006713F 006713F 006713F 8-HP Sensor Adapter Digital Electronic 006714F 006714F 006714F 006714F

9-HP Bypass Kit 006715F 006715F 006715F 006715F 10-HP Bypass Valve 006716F 006716F 006716F 006716F 11-HP Bypass Dam / Shaft 006717F 006717F 006717F 006717F 12-HP Bypass Spring (All Sizes Included) 006718F 006718F 006718F 006718F 13-HP Unitherm Governor 006719F 006719F 006719F 006719F 14-HP Unitherm Governor Plug 006720F 006720F 006720F 006720F 15-HP Drain Plug 006721F 006721F 006721F 006721F 16-HP Inlet/Outlet Header Dam 006722F 006722F 006722F 006722F 17-HP 2" PVC Connector & Nut (2) 006723F 006723F 006723F 006723F 18-HP O Ring (2) 006724F 006724F 006724F 006724F 19-HP Stainless Steel Baffle 006826F 006826F 006826F 006826F

1-HM Heat Exchange Assy.Copper ASME CI 010051F 006727F 010053F 010054F

2-HM Inlet/Outlet Header ASME CI 006730F 006730F 006730F 006730F 15-HM Inlet & Outlet Flange 003766F 003766F 003766F 003766F 16-H

3-HM Return Header ASME CI 006731F 006731F 006731F 006731F 4-HM Tube Bundle Copper ASME ** 010055F 006733F 010057F 010058F

5-HM Baffle 010038F 005261F 010040F 010041F 6-HM Stud Bolt Kit 007870F 007870F 007870F 007870F 7-HM Header Gasket (9) 800014B 800014B 800014B 800014B 8-HM Unitherm Governor 062234B 062234B 062234B 062234B 9-HM U.G. Retainer Spring 850254 850254 850254 850254 10-HM Bypass Valve 062235B 062235B 062235B 062235B 11-HM Bypass Spring 850252 850253 850253 850253 12-HM Drain Valve 500719 500719 500719 500719 13-HM Sensor Well 003765F 003765F 003765F 003765F 14-HM Well Retaining Clip 300203 300203 300203 300203 17-HM Rear Drain Plug & Cover 005264F 005264F 005264F 005264F *FOR INSTALLATIONS AT OVER 5,000 FEET ABOVE SEA LEVEL, CONSULT THE FACTORY **WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and inspect the bypass assembly. Failure to do so could cause premature failure of this replacement part.

Burner Tray w/o Burner (0-5000) 010084F 010085F 010086F 010087F

Burner Orifice Nat. #31 (above 5000 ft.)* 351523/3 351523/4 351523/5 351523/6

C CONTROLS

G GAS VALVE

HP HEAT EXCHANGER - POLYMER

Heat Exchange Assy Cupro Nickel 010356F 010357F 010358F 010359F

Inlet/Outlet Header (Includes 6-HP) 006706F 006706F 006706F 006706F

Tube Bundle Cupro Nickel ** 010364F 010365F 010366F 010367F

Sensor Well Millivolt 006805F 006805F 006805F 006805F

HM HEAT EXCHANGER - METAL

Heat Exchange Assy.Cupro Nickel ASME CI 010360F 010361F 010362F 010363F

Flange Gasket 1 1/2" Connections 062236B 062236B 062236B 062236B Flange Gasket 2" Connections 800080B 800080B 800080B 800080B

Tube Bundle Cupro Nickel ASME ** 010368F 010369F 010370F 010371F

)

(Op

)

LOW NOx HEATERS

CALL

OUT DESCRIPTION 207A 267A 337A 407A

J CONTROL BOX

1-J Transformer 120/240/24V 006736F 006736F 006736F 006736F 2-J Rocker Switch 009493F 009493F 009493F 009493F 3-J Relay Low Nox 008784F 008784F 008784F 008784F

M MISCELLANEOUS COMPONENTS

1-M Pressure Switch 1.75 PSI 006737F 006737F 006737F 006737F

2-M Roll-Out Switch 300ºF 006035F 006035F 006035F 006035F 13-M Roll-Out Switch 250ºF 011745F 011745F 011745F 011745F 3-M PRV 125 PSI (Optional) 008091F 007224F 007224F 007224F 4-M Deliming Kit 052871F 052871F 052871F 052871F 5-M Wire/Harness 010347F 010347F 010347F 010347F 6-M Control Bezel (Includes Switch Decal) 009491F 009491F 009491F 009491F 7-M Switch/Decal-Membrane 009492F 009492F 009492F 009492F 8-M Control Bezel Cover 009487F 009487F 009487F 009487F 9-M Gasket Insulation (Swaybrace & Jacket Top) 010350F 010350F 010350F 010350F 10-M Blower / Air Pressure Switch Sample Tube 010348F 010348F 010348F 010348F 11- M Touch-u

12-M Tie Down Bracket

PPILOT

1-P Pilot Nat. IID Low Nox 010232F 010232F 010232F 010232F 2-P Pilot Electrode Use 1-P Use 1-P Use 1-P Use 1-P 3-P Pilot Mounting Bracket 010233F 010234F 010235F 010236F 4-P Pilot Tube 004078F 004078F 004078F 004078F 5-P Hi Tension Wire IID 010349F 010349F 010349F 010349F

RREFRACTORY

1-R Refractory Common Lt & Rt 010079F 010079F 010079F 010079F 2-R Refractory Uncommon (Front and Rear) 010080F 010081F 010082F 010083F 3-R Refractory Retainer Kit 010262F 010263F 010264F 010265F

S SHEETMETAL

1-S Jacket Top (Louvered) 010047F 010048F 010049F 010050F 2-S Flue Collector (Units with Polymer Header) 010063F 010064F 010065F 010066F

3-S Door Assy.

4-S Access Panel Set (3 Pcs. Units with Polymer Header) 010311F 010311F 010311F 010311F

5-S Jacket Side Panel Right 010313F 010313F 010313F 010313F 6-S Jacket Side Panel Left 010314F 010314F 010314F 010314F 7-S Jacket Rear Panel 010315F 010316F 010317F 010318F 8-S Poolstat Cover/Lock 009505 009505 009505 009505 9-S High Limit Cover 010319F 010319F 010319F 010319F 10-S Base Heat Shield 010320F 010320F 010320F 010320F 11-S Up Front Control Panel 010321F 010322F 010323F 010324F 12-S High Limit Shield 010342F 010342F 010342F 010342F 13-S Weather Shield 010325F 010326F 010327F 010328F

V VENTING

1-V Indoor Stack Kit (Includes inner adapter panel) 009838 009839 009840 009841

2-V Stack Adapter 010330F 010331F 010332F 010333F 4-V Outer Stack Adapter 011461F 011462F 011463F 011464F 3-V "Pagoda" Top 010334 010335 010336 010337

Pressure

Switch 11 PSI S

Paint (Green

Touch-u

Paint (Dark Gra

Flue Collector (Units with Metal Header) 010067F 010068F 010069F 010070F

Raypak 010267F 010268F 010269F 010270F Rheem 010271F 010272F 010273F 010274F Ruud 010271F 010272F 010273F 010274F

Access Panel Set (3 Pcs. Units with Metal Header) 010312F 010312F 010312F 010312F

Outdoor Stack Kit (Includes inner adapter panel) 009834 009835 009836 009837

ecial-See Water Pressure Switch Adj. 009133F 009133F 009133F 009133F

750125 750125 750125 750125

tional

750126 750126 750126 750126 011636 011636 011636 011636

Raypak 266A, 406A, 337A, 407A, 206A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual