INSTALLATION & OPERATING INSTRUCTIONS

CATALOG NO. 6200.50S Effective: 07-01-16 Replaces: 06-16-15 P/N 240499 Rev. 20

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

FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors andliquids or other combustible materials in the vicinity of this or any other appliance.To do so may result in an explosion or fire.

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 orthe gas supplier.

This manual should be maintained in legible condition and kept adjacent to the heater or in another safe place forfuture reference.

Models 514–824

Raytherm Commercial SwimmingPool Heater

®

2

Rev. 20 reflects the following: Changes to: NoneAdditions: NoneDeletions: Warranty on page 33

CONTENTS

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WARNINGS 4Pay Attention to These Terms 4WATER CHEMISTRY 5OWNER’S OPERATING INSTRUCTIONS 6Start-Up Procedures 6Operating Instructions and Shut-OffProcedures 6Automatically Lighted Pilots 6Electronic Ignitions Systems 6Caution 8Maintenance and CareProcedures 9Pool & Spa Water Chemistry 9INSTALLATION & SERVICE INSTRUCTIONS 10Receiving Equipment 10General Specifications 10Installation Instructions 10Clearances 11Combustion Air 12Vent Piping 13Gas Supply Connections 14Plumbing for Water Connections 15Piping Diagrams 16Electrical Wiring 18Wiring Diagram—Models 514–724 20Wiring Diagram—Model 824 21Wiring Diagram—Models 514–724—Spa 22Wiring Diagram—Model 824—Spa 23Servicing 24Troubleshooting 29Replacement Parts 32

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DANGER: Indicates the presence of immediate hazards which will cause severe person-al injury, death or substantial property damage if ignored.

WARNING: Indicates the presence of hazards or unsafe practices which could causesevere personal injury, death or substantial property damage if ignored.

CAUTION: Indicates the presence of hazards or unsafe practices which could causeminor personal injury or product or property damage if ignored.

NOTE: Indicates special instructions on installation, operation, or maintenance whichare important but not related to personal injury hazards.

WARNING: Should overheating occur or the gassupply valve fail to shut, do not turn off or disconnectthe electrical supply to the heater. Instead, shut offthe gas supply at a location external to the heater.

WARNING: To minimize the possibility of improperoperation, serious personal injury, fire, or damage tothe heater:

• Always keep the area around the heater free ofcombustible materials, gasoline, and other flam-mable liquids and vapors.

• Heater should never be covered or have anyblockage to the flow of fresh air to the heater.

WARNING - CALIFORNIA PROPOSITION65: This product contains chemicals known to theState of California to cause cancer, birth defects orother reproductive harm.

WARNINGS

Pay Attention to These Terms

DANGER: Make sure the gas on which the heaterwill operate is the same type as that specified on theheater rating plate.

DANGER: Failure to install the draft hood on indoorinstallations and properly vent the heater to theoutdoors as outlined in the Venting section of thismanual can result in unsafe operation of the heater.To avoid the risk of fire, explosion, or asphyxiationfrom carbon monoxide, never operate this heaterunless it is properly vented and has an adequate airsupply for proper operation. Be sure to inspect thevent system for proper installation at initial start-up;and at least annually thereafter. Refer to theMaintenance section of this manual for moreinformation regarding vent system inspections.

DANGER: There is a Hot Water SCALD Potential ifthe poolstat is set too high.

DANGER:When servicing or replacing componentsthat are in direct contact with the water, be certainthat:• There is no pressure in the heater. (Pull the releaseon the relief valve. Do not depend on the pressuregauge reading).• The heater water is not hot.• The electrical power is off.

WARNING: Both natural gas and propane have anodorant added to aid in detecting a gas leak. Somepeople may not physically be able to smell orrecognize this odorant. If you are unsure orunfamiliar with the smell of natural gas or propane,ask your local gas supplier. Other conditions, suchas "odorant fade," which causes the odorant todiminish in intensity, can also hide, camouflage, orotherwise make detecting a gas leak by smell moredifficult.

WARNING: UL recognized fuel gas detectors arerecommended in all enclosed propane and naturalgas applications wherein there is a potential for anexplosive mixture of fuel gas to accumulate and theirinstallation should be in accordance with thedetector manufacturer's recommendations and/orlocal laws, rules, regulations, or customs.

WARNING: This product must be installed by alicensed plumber or gas fitter when installed withinthe Commonweatlh of Massachusetts.

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WATER CHEMISTRY

For your health and the protection of your pool equip-ment, it is essential that your water be chemicallybalanced. The following levels must be used as aguide for balanced water.

• Occasional chemical shock dosing of the pool orspa water should not damage the heater providingthe water is balanced.

NOTE: Heat exchanger damage resulting fromchemical imbalance is not covered under the war-ranty.

Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool and SpaTypes

Water Temperature 68-88°F (20-31°C) 89-104°F (31-40°C) 68-104°F (20-40°C)

pH 7.3-7.4 7.3-7.4 7.6-7.8

Total Alkalinity (ppm) 120-150 120-150 80-120

Calcium Hardness (ppm) 200-300 150-200 200-400

Salt (ppm) 6000 Maximum 6000 Maximum 6000 Maximum

Free Chlorine (ppm)* 2-3 2-3 2-3

Total Dissolved Solids(ppm) 3000 Maximum 3000 Maximum 3000 Maximum

*Free Chlorine MUST NOT EXCEED 5 ppm!

Table A: Water Chemistry

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

• Further advice should obtained from your pool orspa builder, accredited pool shop, or chemicalsupplier for the correct levels for your water.

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OWNER’S OPERATINGINSTRUCTIONS

Start-Up Procedures

Before Start-Up

Burners

Clean main burners and air louvers of dust, lint anddebris. Keep heater area clear and free from com-bustibles, flammable liquids and chemicals. Do notobstruct the flow of combustion and ventilating air.

Water

First thing, ensure that system is filled with water andhave pump operating. Water must be flowing throughthe heater during operation.

Operating Instructions andShut-Off ProceduresAutomatically Lighted PilotsElectronic Ignitions Systems

A. This appliance is equipped with an ignition devicewhich automatically lights the pilot. Do not try tolight the pilot by hand.

B. BEFORE OPERATING, smell all around the appli-ance area for gas. Be sure to smell next to thefloor because some gas is heavier than air and willsettle on the floor.

FOR YOUR SAFETY - READ BEFOREOPERATING: WARNING: If you do not followthese instructions exactly, a fire or explosion mayresult, causing property damage, personal injury ordeath.

CAUTION: Propane gas is heavier than air and willsettle on the ground. Since propane can accumulatein confined areas, extra care should be exercisedwhen lighting propane heaters.

WHAT TO DO IF YOU SMELL GAS:

• Do not try to light any appliance.• Do not touch any electric switch; do not use any

telephone in your building.• Immediately call your gas supplier from a neigh-

bor's telephone. Follow the gas supplier’sinstructions.

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

C. Use only your hand to push in or turn the gas con-trol knob. Never use tools. If the knob will not pushin or turn by hand, do not try to repair it; call a qual-ified service technician. Force or attempted repairmay result in fire or explosion.

D. Do not use this appliance if any part has beenunder water. Immediately call a qualified servicetechnician to inspect the appliance and to replaceany part of the control system and any gas controlwhich has been under water.

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8

After Start-Up

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

Visual Inspection

With the heater on, remove the door and make a visualcheck of the pilot and burner. The flame should be bluewith a well-defined pattern.

A yellow or “floating” flame indicates restricted airopenings or incorrect orifice size. Should this occur,shut the heater off and contact your installer or gassupplier.

Water Pressure Switch

A water pressure switch is provided in the heater toshut off the burners in the event that water supply tothe heater is interrupted. It is very important to verifythat the switch electrically opens and shuts off the gasvalve when water flow to the heater is interrupted.Otherwise, rapid and severe damage will likely occurto the heater. (The water pressure switch should be

WARNING: Should overheating occur or the gassupply fail to shut off, turn off the manual gas controlto the appliance.

Fig. 1: Main Burner Flame

Fig. 2: Pilot Burner Flame

checked and adjusted for proper operation by a quali-fied service person at the time of installation andperiodically checked thereafter. Refer to pressureswitch servicing instruction in this manual).

Caution

Elevated water temperature can be hazardous, andthe U.S. Consumer Product Safety Commission rec-ommends the following guidelines:

1. Spa or hot tub water temperatures should neverexceed 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 duringspa or hot tub use can cause drowsiness whichcould lead to unconsciousness and subsequentlyresult in drowning.

3. Pregnant Women Beware! Soaking in water over102°F (39°C) can cause fetal damage during thefirst three months of pregnancy, resulting in thebirth 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 shouldcheck the water temperature with an accuratethermometer; spa or hot tub thermostats may errin regulating water temperatures by as much as4°F (2.2°C).

5. Persons with a medical history of heat disease,circulatory problems, diabetes, or blood pressureproblems should obtain a physician’s advicebefore using pools or hot tubs.

6. Persons taking medications which induce drowsi-ness, such as tranquilizers, antihistamines, oranticoagulants, should not use spas or hot tubs.

WARNING: Operation of the heater without watercirculation will cause rapid and severe damage tothe heater. Such damage is not covered under war-ranty.

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Maintenance and CareProcedures

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

1. Inspect top of heater and drafthood for soot, (asticky black substance around finned tubes and“V” baffles), and open flue gas passageways.

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

3. Inspect and operate all controls, gas valve andpressure relief valve.

4. Make visual check of the burner and pilot flame.Flame pattern on the main burner and pilot is indi-cated in the previous illustration. Yellow flamemeans restriction of the air openings. Lifting orblowing flame indicates high gas pressure. Lowflame means low gas pressure. Should this occur,shut the heater off and contact your gas supplieror qualified service agency.

5. On indoor heater, clean room air intake openingsto ensure adequate flow of combustion and venti-lation air.

6. Keep air around heater clear and free from com-bustible materials, gasoline and other flammableand corrosive vapors and liquids.

Basic Tips If Heater Will Not Fire

1. If you have no electrical power, it may be that yourcircuit breakers" have tripped. Try re-setting them.

2. If you have electrical power but the heater will notfire, check the following:

3. The time clock must be moved to the "ON" posi-tion.

4. Your pump strainer basket may be full. If soremove debris.

5. Your filter may be dirty. If so, backwash or clean fil-ter. (To tell if your filter is dirty, the gauge pressurewill be higher than usual).

6. The pump may have lost its prime. It may be run-ning dry, check the pressure gauge on the filter. Ifthere is no pressure; then you are not movingwater (or your gauge is broken). Try to get thepump to run at it's normal flow rate.

Pool & Spa Water Chemistry

Chemical imbalance can cause severe damage toyour heater and associated equipment. Maintain yourwater chemistry according to the chart on page 5. Ifthe mineral content and dissolved solids in the waterbecome too high, scale forms inside the heat exchang-er tubes, reducing heater efficiency and alsodamaging the heater, If the pH drops below 7.2, theheater will be severely damaged. This will result in cor-rosion of the heat exchanger. Heat exchangerdamage resulting from chemical imbalance is notcovered by the warranty.

When heaters installed outdoors in freezing climateareas are to be shut down for the winter, observe thefollowing step-by-step procedure:

1. Turn off gas valve, manual gas valve, and electri-cal supply to the heater.

2. Open drain cock located on the inlet/outlet header,(under water pipes).

3. Disconnect compression fittings from the pressureswitch and return header that connect to the 1/4"copper tube and allow the tube to drain.

CAUTION: Soot may be combustible. Wet sootedsurfaces completely prior to cleaning. Do not usesteel wire brush.

CAUTION: Combustion air must not be contami-nated by corrosive chemical fumes which candamage the heater and void the warranty.

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INSTALLATION & SERVICEINSTRUCTIONSReceiving Equipment

On receipt of your equipment it is suggested that youvisually check for external damage to the carton. If thecarton is damaged, a note should be made on the Billof Lading when signing for equipment. Remove theheater from the carton and if it is damaged, report thedamage to the carrier immediately.

On occasion, we ship some items loose. Be sure thatyou receive the number of packages indicated on theBill of Lading.

When ordering parts, you must specify model and seri-al number of heater. When ordering under warrantyconditions, you must also specify date of installation.

Raypak recommends that this manual be reviewedthoroughly before installing your Raypak pool/spaheater. If there are any questions that this manualdoes not answer, please contact the factory or yourlocal Raypak representative.

General Specifications

These heaters are design-certified and tested underthe requirements of ANSI Z21.56/CSA 4.7 AmericanNational Standard for Gas-Fired Pool Heaters.

All heaters are interchangeable and can be usedeither indoor or outdoors. The appropriate top desig-nated for that type of use is required. If desired, the topcan be changed at a later date from outdoor to indooror vice versa.

Rated inputs suitable for natural gas at elevations upto 2000 feet. For propane inputs, multiply the naturalgas rating by 0.94.

For elevations above 2000 feet, reduce input 4% foreach 1000 feet above sea level, as height elevationreduces combustion performance.

Installation Instructions

Code Requirements

Installation must be in accordance with local codes, or,in the absence of local codes, with the latest edition ofthe National Fuel Gas Code (NFGC), ANSIZ223.1/NFPA 54 and National Electrical Code (NEC),ANSI/NFPA 70.

Base Installation

Heater must be mounted on a level base, such ascement slab, cement blocks or other non-combustiblesurface. An optional non-combustible base is availablefor all models. An alternative method for providing abase for combustible floors is illustrated in Fig. 3.Heater must not be installed on carpeting.

NOTE: These instructions are intended for the useof qualified personnel only, specifically trained andexperienced in the installation of this type of heatingequipment and related system components.Installation and service personnel may be requiredby some states to be licensed. If your state is such,be sure your contractor bears the appropriatelicense. Persons not qualified shall not attempt to fixthis equipment nor attempt repair according to theseinstructions.

WARNING: Improper installation, adjustment,alteration, service or maintenance may damage theequipment, create a hazard resulting inasphyxiation, explosion or fire, and will void thewarranty.

NOTE: The heater should not be located in an areawhere possible water leakage will result in damageto the area adjacent to the appliance or to thestructure. When such locations cannot be avoided, itis recommended that a suitable drain pan,adequately drained, be installed under theappliance. The pan must not restrict combustion airflow.

Fig. 3: Alternate Mounting Base

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The point from where the flue products exit the heatermust be a minimum of four (4) feet below, four (4) feethorizontally from or one (1) foot above any door, win-dow or gravity inlet to a building. The top surface of theheater shall be at least three (3) feet above any forcedair inlet, or intake ducts located within ten (10) feet hor-izontally.

High Wind Conditions(Outdoor Units Only)

In areas where high winds are frequent, it may be nec-essary to locate the heater a minimum of 3' from highvertical walls, or install a wind break so the heater isnot in direct wind current.

Indoor Heaters

The design is also certified for indoor installation whenequipped with the approved draft hood and (if neces-sary) combustible floor shield. Locate heater as closeas practical to a chimney or gas vent. Heater mustalways be vented to the outside. See Vent PipingSection on page 13 for venting details. Minimum allow-able space is shown on the nameplate.

Clearances

All Heaters

For clearances from combustible surfaces, seeTable B.

Outdoor Heaters

These heaters are design-certified for outdoor installa-tion, when equipped with the approved topsdesignated for outdoor use.

Heaters must not be installed under an overhang ofless than three (3) feet from the top of the heater.Three (3) sides must be open in the area under theoverhang. Roof water drainage must be diverted awayfrom the heaters installed under overhangs with theuse of gutters.

Table B: Minimum Clearances from CombustibleConstruction

NOTE 1 - 36” minimum from top of vent terminal.NOTE 2 - Must not be installed on carpeting.

Combustible floor base required for instal-lation on a combustible surface

NOTE 3 - Combustible floor sheild optional for out-door installation.

NOTE 4 - For servicing, provide at least 24" in front ofthe heater for burner tray removal, and atleast 18" on water connection side of theheater to inspect and delime the heatexchanger.

WARNING: The heater shall not be located in anarea where water sprinklers, or other devices, maycause water to spray through the cabinet louversand into the heater. This could cause heavy internalrusting or damage some electrical components, andthis would void the warranty.

Fig. 4: Minimum Distance from Openings

Heater SideMin. Clearance from

Combustible Surfaces

Indoor Outdoor

Top (Indoor) See note 1

Top (Outdoor) Unobstructed

Front Alcove

Back 10” 10”

Water Side 6” 6”

Other Side 6” 6”

Vent 6”

Floor See note 2 See note 3

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Combustion Air (Indoor Units Only)

Air For Combustion and Ventilation(Indoor Units Only)

The heater must have both combustion and ventilationair. Minimum requirements for net free air supplyopenings, one 12 inches from ceiling for ventilationand one 12 inches from the floor for combustion air asoutlined in the latest edition of ANSI Z 223.1/NFPA 54and any local codes that may have jurisdiction.

a. All air from inside the building:Each opening shall have a minimum net freesquare inches as noted in Table C.

b. All air from outdoors:When air is supplied directly from outside of build-ing, each opening shall have a minimum net freesquare inches as noted in Table D.

Model Square Inches

514 512

624 627

724 726

824 825

CAUTION: Combustion air must not becontaminated by corrosive chemical fumes whichcan damage the heater and void the warranty.

Model Square Inches

514 128

624 157

724 182

824 207

Table C: Air from Inside the Building

Table D: Air from Outside the Building

Venting Connections

Vent Terminal (Outdoor)

1. Lower outdoor “Stackless” top on to unit. Positiontop so it is centered on unit from side to side andfront to rear.

2. Tighten the (4) screws (See Fig. 6) until they comein contact with the unit jacket top, then evenlytighten all (4) screws to secure to unit.

Fig. 5: Lower Outdoor “Stackless” Top Onto Unit

Fig. 6: Tighten the (4) Screws (TYP.)

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Vent Terminal (Indoor)

Locate and assemble as shown below. Secure withscrews supplied in envelope in carton.

Vent Piping

Vent piping the same size or larger than the draft hoodoutlet is recommended (but not to exceed listing inchapter 13 of ANSI Z 223.1/NFPA 54), however, whenthe total vent height is at least ten (10) feet (draft hoodrelief opening to vent terminal), the vent pipe size maybe reduced as specified in Chapter 13 of the latest edi-tion of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

As much as possible avoid long horizontal runs of ventpipe and too many elbows. If installation requires hor-izontal non-vertical runs, the vent pipe must have aminimum of 1/4 inch per foot rise and should be sup-ported at not less than five-foot intervals. Plumber’stape, crisscrossed, will serve to space both horizontaland vertical piping. Gas vents supported only by theflashing and extending above the roof more than fivefeet should be securely guyed or braced to withstandsnow and wind loads. We recommend use of insulatedvent pipe spacer through the roofs and walls.

For protection against rain or blockage by snow, thevent pipe must terminate with a vent cap which com-plies with the local codes or, in the absence of such

Fig. 7: Vent Terminal (Indoor)

WARNING: Indoor heaters require a draft hoodthat must be connected to a vent pipe and properlyvented to the outside. Failure to follow this procedurecan cause fire or fatal carbon monoxide poisoning.

codes, to the latest edition of the National Fuel GasCode, ANSI Z 223.1/NFPA 54.

The discharge opening must be a minimum of two feetvertically from the roof surface and at least two feethigher than any part of the building within ten feet.Vent stack shall be at least five feet in vertical heightabove the draft hood outlet.

The vent cap location shall have a minimum clearanceof 4 feet horizontally from, and in no case above orbelow, unless a 4-foot horizontal distance is main-tained, from electric meters, gas meters, regulatorsand relief equipment.

The weight of the vent stack or chimney must not reston heater draft hood. Support must be provided incompliance with applicable codes. The heater top anddraft hood must be readily removable for maintenanceand inspection. Vent pipe should be adequately sup-ported to maintain proper clearances from combustibleconstructions.

Type “B” double-wall or equivalent vent pipe, certifiedfor Category I vent conditions, is recommended.However, single-wall metal vent pipe may be used asspecified in the latest edition of the National Flue GasCode ANSI Z 223.1/NFPA 54.

5' MIN

2' MIN

10' OR LESS

2' MIN

VENT CAP

VENT PIPE

DRAFT HOOD

HEATER

Fig. 8: Venting Clearances

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At the time of removal of an existing heater, the follow-ing steps shall be followed with each applianceremaining connected to the common venting systemplaced in operation, while the other appliances remain-ing connected to the common venting system are notin operation.

(a) Seal any unused openings in the common ventingsystem.

(b) Visually inspect the venting system for proper sizeand horizontal pitch and determine there is noblockage or restriction, leakage, corrosion andother deficiencies which could cause an unsafecondition.

(c) Insofar as is practical, close all building doors andwindows and all doors between the space in whichthe appliance remaining connected to the commonventing system are located and other spaces ofthe building. Turn on clothes dryers and any appli-ance not connected to the common ventingsystem. Turn on any exhaust fans, such as rangehoods and bathroom exhausts, so they will oper-ate at maximum speed. Do not operate a summerexhaust fan. Close fire place dampers.

(d) Place in operation the appliance being inspected.Follow the lighting instructions. Adjust thermostatso appliance will operate continuously.

(e) Test for spillage at the draft hood relief openingafter 5 minutes of main burner operation. Use theflame of a match or candle, or smoke from a ciga-rette, cigar or pipe.

(f) After it has been determined that each applianceremaining connected to the common venting sys-tem properly vents when tested as outlined above,return doors, windows, exhaust fans, fireplacedampers and any other gas burning appliance totheir previous conditions of use.

(g) Any improper operation of the common ventingsystem should be corrected so the installation con-forms with the latest edition of the National FuelGas Code, ANSI Z 223.1/ NFPA 54. When re-siz-ing any portion of the common venting system, thecommon venting system should be re-sized tomatch the minimum size as determined using theappropriate tables in part 11 of national Fuel GasCode, ANSI Z 223.1/NFPA 54.

For special venting applications that require reducedvent sizes and through the wall venting, the Type DInduced Draft Assembly can be used. Consult the fac-tory or your local Raypak representative.

Gas Supply Connections

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

A minimum of 7 in. WC and a maximum of 10.5 in. WCupstream pressure under load, and no-load conditionsmust be provided for natural gas or a minimum of 12in. WC and a maximum of 13 in. WC for propane gas.

Gas Pressure Regulator

CAUTION: The heater and its manual shut offvalve must be disconnected from the gas supplyduring any pressure testing of that system at testpressures in excess of 1/2 Psig (3.45 KPA).Dissipate test pressure in the gas supply line beforereconnecting the heater and its manual shut off valveto gas supply line. FAILURE TO FOLLOW THISPROCEDURE MAY DAMAGE THE GAS VALVE.OVER-PRESSURIZED GAS VALVES ARE NOTCOVERED BY WARRANTY. The heater and its gasconnections shall be leak tested before placing theappliance in operation. Use soapy water for leaktest. Do NOT use open flame.

NOTE: Do not use teflon tape on gas line pipethread. A flexible sealant approved for the fuel beingused is recommended.

Fig. 9: Gas Connections

The gas pressure regulator is preset and sealed at 4in. WC for natural gas, and 11 in. WC for propane gas.Between the gas valve and the burners is a 1/8” pipe plug.The pressure at this point, taken with a manometer,should be about 3.7 in. WC natural gas and 10.5 in.WC propane gas. If an adjustment is needed, removeseal and turn adjustment screw clockwise toincrease pressure or counter clockwise to de-crease pressure

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Fig. 10: Gas Pressure Test Points

Model1/2” 1” 1-1/4” 1-1/2” 2” 2-1/2”

N P N P N P N P N P N P

514 10 15 35 65 150 130 360 500

624 10 25 45 100 95 250 340

724 20 35 80 75 180 260 600

824 15 25 60 55 130 185 480 500

Table E: Pipe Sizing for Gas Connections

Natural gas, 1000 BTU/Ft .60 Specific Gravity @ 0.5 in. WC Pressure DropPropane Gas, 2500 BTU/Ft 1.53 Specific Gravity @ 0.6 in. WC Pressure Drop

Plumbing For Water Connections

Location

The heater requires water flow and positive pressureto fire and operate properly. It must therefore beinstalled downstream of the discharge side of the filterpump. A typical installation is plumbed as follows:

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

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

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

The heater must be located so that any water leaks willnot damage the structure of adjacent area. High-tem-perature plastic pipe (CPVC) may be connecteddirectly into the heater if local codes permit and if con-trols operate the pump for at least fifteen minutes afterthe heater is turned off.

When local codes permit the use of less than four feethigh-temperature piping or two elbows, provisionsshould be made to always shut the heater off a mini-mum of 15 minutes prior to pump shut down in orderto carry away residual heat and prevent damage to thelow temperature piping.

A fireman switch included in the time clock may beused for this purpose with instruction not to overridethis sequence manually. See wiring diagram sectionfor electrical hookup location of the fireman switch inthe electrical circuit.

CAUTION: NEVER install PVC directly into heater.Four feet of copper or high-temperature pipe and twoelbows are required between the heater and thePVC connections

Fig. 11: Water Piping Connections

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Piping Diagram—Single Heater

Piping Diagram—Two Heaters

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Companion Flange Connections

DO NOT use petroleum base assembly fluids (such asPetroleum Jelly or lubricating oil). If assembly tube isrequired use a silicone base such as Armoral etc. Theinlet/outlet header flange accepts a 2” copper tube asa slip connection directly into the header. The flange isalso threaded for a 2” copper male threaded adapter.

Automatic Chlorinators and ChemicalFeeders

All chemicals must be introduced and completely dilut-ed into the pool or spa water before being circulatedthrough the heater. Do not place chlorine tablets orbromine sticks in the skimmer. High chemical concen-trations will result when the pump is not running (i.e.overnight).

Model Pipe Size Min. gpm Max. gpm

514 - 824 2” 60 120

NOTE: Any restrictions between heater outlet andpool will void the warranty.

NOTE: When 2” piping is used into the heater, thispiping must be anchored (copper) or screwed intothe flange (metal) if operating pressures above 30PSI are encountered.

Table F: Flow Rates

Fig. 12: Flange Connections

Chlorinators must feed downstream of the heater andhave an anti-siphoning device to prevent chemicalbackup into the heater when the pump is shut off.

Unitherm Governor Operation

The patented Unitherm Governor is a thermostaticmixing valve specifically designed to maintain constantheater internal temperature between 105°F to 115°Fdespite continually changing flow rates from the filterand changing pool temperatures. This narrow range isneeded to prevent damaging condensation on theburners which will occur if the heater runs for anylength of time below 100°F. It is also needed to inhibitscale formation in the tubes by maintaining tempera-tures well below accelerated scaling temperatures.

External Auxiliary Bypass Valve(Where Required)

An auxiliary bypass valve should be used when flowrates exceed 115 gpm (usually a high-performancepump size larger than two HP will exceed this flowrate). This valve is required to complement the func-tion of the automatic bypass valve, particularly whenstarting the heater in winter or early spring when thespa or pool temperature is below 55°F. It also servesto eliminate needless pressure drop through theheater and accompanying reduction in the flow rate tothe spa jets, etc.

NOTE: High chemical concentrates from feedersand chlorinators that are out of adjustment will causevery rapid corrosion to the heat exchanger andunwarrantable damage to the heater,.

Fig. 13: Auxiliary Bypass Valve

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Auxiliary Bypass Valve Adjustment

To set bypass: with clean filter, adjustment is made byfeeling the inlet and outlet pipes at the heater. Outletpipes should be slightly warmer than inlet and comfort-able to the touch. If pipe is hot, close bypass; if cold,open bypass.

The heater is also equipped with a manual bypassbuilt into the header. This is in addition to the automat-ic bypass valve. This may be used with flow rates upto 120 gpm and adjusted as below.

Pressure Relief Valve Installation

A 3/4 NPT, 125 psi pressure relief valve (PRV) is stan-dard with this heater. Local building codes mayrequire a PRV with a different pressure setting. Themaximum allowable PRV rating is 150 psi. ASMECode requirements mandate that any PRV used musthave a relief capacity equal to or larger than theBTU/hr input of the heater.

The standard PRV is mounted in a 3/4 NPT connectionon the inlet/outlet header, as shown in Fig. 15. If therequired PRV calls for a larger connection, mount it ina tee in the outlet piping and plug the 3/4 NPT port.The PRV must be installed in the vertical position.

NOTE: Sooting or liming caused by improperbypass adjustment voids the warranty

Fig. 14: Manual Bypass Adjustment

Fig. 15: Pressure Relief Valve Location

To avoid water damage or scalding due to valve oper-ation, drain pipe must be connected to the PRV outletand run to a safe place of discharge per local coderequirements. Drain pipe must be the same size as thePRV discharge connection throughout its entire lengthand must pitch downward from the PRV. No shutoffvalve shall be installed between the PRV and the drainline. Valve lever should be tripped at least once a yearto ensure that waterways are clear.

Electrical Wiring

The heater draws less than 1 amp when operatedon either 120VAC or 240VAC power.

The Electronic Intermittent Ignition Device automati-cally lights the pilot and main burners upon a call forheat. The heater is supplied with a dual voltage trans-former for 120V or 240V input power hookup.

NOTE: If it is necessary to replace any of theoriginal wiring, it must be replaced with 105°C wire orits equivalent, except all black wires must bereplaced with 150°C wire or its equivalent.

NOTE: Heaters are factory wired for 240V powersupply, except Cal Code units wired for 120V PowerSupply.

Fig. 16: Ignition Control

19

For 120 V input power to the unit, connect the blackwire to the “L1” or hot leg of the power supply. Connectthe white wire to the “L2” or neutral leg of the powersupply. Attach the wire nut to the red wire. Thereshould be no connection to the red wire for 120V oper-ation.

For 240 V input power to the unit, connect the blackwire to the “L1” or hot leg of the power supply. Connectthe red wire to the “L2” or second hot leg of the powersupply. Attach the wire nut to the white wire. Thereshould be no connection to the white wire for 240Voperation.

Heater must be electrically grounded and bonded inaccordance with local codes, or, in the absence oflocal codes, with the latest edition of the NationalElectrical code, NFPA 70.

Fig. 17: 120V Connections

Fig. 18: 240V Connections

NOTE: Input power to the heater (120/240V) shouldbe supplied from the load (Pump) side of time clockor switch. Connecting heater to continuous powersource will allow "Fail" indications (service andpressure switch) when pump is not operating.

NOTE: The wiring diagrams in this manual show allstandard options. Refer to the large wiring diagramprovided with your heater for options installed onyour specific unit(s).

20

Wiring Diagram—Models 514–724

21

Wiring Diagram—Model 824

22

Wiring Diagram—Models 514–724—Spa

23

Wiring Diagram—Model 824—Spa

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Servicing

General Location of Controls

Fig. 19: General Location of Controls

Controls/Adjustments/Replacements

Poolstat

The heater is built with a single mechanical poolstat,located in the front panel above the door. The poolstatmay be set for any desired pool or spa temperaturefrom 66-104ºF.

Knobstop Adjustment

If desired, a higher setting of the poolstat can beobtained by adjusting the knobstop ring on the dialplate. Loosen the set screw, adjust the knobstop forthe higher desired temperature setting and retightenthe set screw.Fig. 20: Poolstat

Fig. 21: Knobstop

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Two-Speed Pumps

In some cases, the flow on the low speed is insufficientto operate the heater. This is apparent when the pres-sure switch cannot be further adjusted or if the heatermakes banging noises. In these cases, the pump mustbe run at high speed when heating the water.

High Limits

The heater is equipped with two automatic high limits.Set to operate at 135°F and 140°F.

Pressure Switch

The pressure switch, or heater actuator, ensures thatthe heater operates only when the filter pump is inoperation. It is factory set at 1.75 PSI for deck levelinstallations. When the heater is located below thelevel of the spa or pool it may be necessary to resetthe pressure switch to compensate for the no-flowstatic head. If it is necessary to reset the pressureswitch, we recommend the following procedure.

Pressure Switch Adjustment

1. Make sure the pool filter is clean before adjustingthe switch.

2. Set the heater control to the OFF mode.

3. Turn the filter pump on and confirm that the pres-sure switch is closed (use a multimeter to check).If the pressure switch fails to close, either theswitch setting is too high or the filter pump is notsupplying enough pressure.

4. Turn the heater ON.

5. Manually turn the pressure adjustment knob clock-wise until the heater shuts off. (A flat screw drivermay be necessary if knob is too tight).

6. Slowly turn the adjustment knob counter-clock-wise until the heater calls for heat again.

7. Turn an additional 1/2 turn counter-clockwise.

8. While the heater is running, check the adjustmentby turning the pump off and on several times. Theburners should shut off immediately when thepump is turned off. If it does not, repeat the abovesteps until proper operation is observed.

Fig. 22: Pressure Switch Adjustment Range

5’ Max

5’ Max

Fig. 23: Heat Exchanger Height Above/Below Pool

NOTE: If heater is installed outside of the limitsshown in Fig. 23, a flow switch must be used inplace of the pressure switch when mounted andwired adjacent to the heater.

CAUTION: Do not operate the heater without afunctioning and properly adjusted pressure switch.

NOTE: An erratic high limit is often characteristic ofan internal heat exchanger problem, i.e. scale build-up, U.G. operation. Refer to troubleshootingsections.

Fig. 24: High Limit

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High Limit Removal

1. Shut off main electrical power switch to heater.

2. Remove inspection panels.

3. Drain heater.

4. Remove defective high limit and replace with anew high limit.

5. Reverse above procedure to re-install.

Pilot Safety

The heater employs a pilot safety which closes themain gas valve within 8/10ths of a second wheneverthe pilot flame is interrupted. Pilot flame is automatical-ly lit when the device is powered. Unit performs its ownsafety check and opens the main valve only after thepilot is proven to be lit.

Burner Drawer 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 unit,and (2) screws that secure gas valve to jacket.

6. Disconnect wires that terminate at gas valve.

7. Slide out burner tray.

8. Reverse above procedure to reinstall.

Gas Valve Removal

1. Shut off gas supply to the heater. Remove gas pip-ing to gas valve inlet.

2. Disconnect wires, pilot tubing and bleed line, ifrequired.

3. Turn vertical gas pipe from manifold slightly andunscrew gas valve.

4. Reverse above procedure to re-install.

Main Burner and Orifice Removal

1. Remove burner drawer. See burner drawerremoval procedure.

2. Remove screws and burner hold down bracket.

3. Lift burners from slotted spacers and slide from ori-fices. Clean with a non-sparking wire brush.

4. Orifices usually do not need to be replaced. Toclean, run either copper wire or wood toothpickthrough orifice. Do not enlarge hole. To remove ori-fice, use a socket wrench and remove frommanifold. DO NOT over tighten when reinstalling.

Pilot Removal and Cleaning

1. Remove burner drawer. (See burner drawerremoval procedure).

2. Disconnect pilot tubing, disconnect wires from gasvalve.

3. Disconnect pilot bracket from burner shield.

4. Remove pilot from bracket.

5. Remove pilot orifice and air opening, and cleanwith wire or small brush. CAUTION! DO NOTenlarge hole in pilot orifice.

6. Reverse above procedure to re-install.

Heat Exchanger Removal

1. Shut water, gas and electricity off, close valvesand relieve pressure, remove relief valve. Removeside inspections panels.

2. Remove top holding screws.

3. Remove draft diverter, lift and remove top and fluecollector. Remove inspection panels.

4. Loosen bolts and disconnect flange nuts on inlet-outlet header, loosen union(s) at gas pipe andslide heater away from piping until stud clear theheader.

NOTE: If the heat exchanger is sooted badly, theburner hold-down bracket and spacer can becomedistorted from direct flame impingement; this usuallynecessitates replacement of these parts.

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Extension Pieces (5) Auger with Carbide Tip Wire Brush

RAYPAK TUBE CLEANING KIT

F Fig. 34: Tube Cleaning Kit

5. Remove heat exchanger corner brackets.

6. Remove combustion chamber clips at the four cor-ners of the heat exchanger.

7. Lift heat exchanger straight up using caution not todamage refractory.

8. Reverse above procedure to reinstall.

Tube Cleaning Procedure

Establish a regular inspection schedule frequency,depending on local water condition and severity ofservice. Do not let the tubes clog up solidly. Clean outdeposits over 1/16” in thickness.

The heater may be cleaned from the right side, withoutbreaking pipe connections. It is preferable, however, toremove both headers for better visibility through thetubes and to be sure the ground-up lime dust does notget into the system.

Note that you do not remove the top panel or the heatexchanger, generally. After reaming, mount the wirebrush in place of the auger and clean out debrisremaining in the tubes.

Another method is to remove the heat exchanger,ream tubes and immerse heat exchanger in non-inhib-ited de-scale solvent for severe scale buildup.

Tube Replacement Procedure

On Raypak units, tube replacement may be effectedwithout rolling as a temporary means or repair, provid-ing there are two or more tubes rolled in to act as stayson the left and right side. The “O” rings should providea seal up to 120 PSI working pressure.

Use 3/8” heavy-duty reversible drill motor or larger topower the tube roller. If a reversible drill is not avail-able, after rolling the tube in, remove the drill motorand wrench out the roller. A tube roller is available fromthe factory.

Shut gas and power off to the unit, close the system offand drain the heater. Remove the draft diverter.Remove the access panel and jacket top. Lift flue col-lector off. Remove “V” baffles over tube(s) to bereplaced. If no pipe unions have been provided, usethe header as a union, remove the flange nuts off theinlet/outlet header, break gas connection and slideheater away from piping to allow room to work. Pullwedge clips out of control wells and remove sensingbulbs. Remove flange nuts of the return header andremove header. Lift heat exchanger straight up andout.

Heat exchanger header o-rings must be replaced withnew ones. The tube may be cut out with a hacksaw orhammer and chisel adjacent to both tube sheets, leav-ing studs in the tube sheets. Then proceed to collapsestuds in the tube sheets with a chisel or screwdriver.Use caution not to cut into the tube sheet.Replacement tubes will have the fins stripped offlonger on one end. The long end is inserted into theopening of the tube sheet first; then the short end is fit-ted through the opposite tube sheet. If the tube endsbecome dented or bent, straighten at least (4) inchesback from the tube and by means of a tapered punch.

Insert tube roller into tube opening up to stop againsttube, then push center rod in until roller is tight. Becareful to keep replacement tube squared up 1/8” out-side each tube sheet. A loose tube will sometimes pulltoward the roller. Attach drill motor to tube roller, hold-ing it straight and level. Proceed to expand tube untilthe tool begins to grab. At this point, 1/2” to 1” shouldbe expose on the tool shank. Reverse drill motor orwrench out by hand. Care should be exercised toavoid applying excessive torque during rolling opera-tion and to avoid thinning out any part of the tube wallexcessively over .015''. Use same procedure at theopposite end of the tube.

Apply line pressure test, and re-roll, if necessary,before reassembly of the heater.

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De-sooting Procedure

Soot will clog areas between fins and cause eventualtube failure. Any sign of soot at the base of the burnersor around the outer jacket indicates a need for clean-ing.

1. Remove top and flue collector from cabinet.

2. Remove “V” baffles from heat exchanger.

3. Remove burner drawer. (See burner tray removal).

4. Take garden hose and wash heat exchanger, mak-ing sure soot is removed from between fins. (Avoidexcessive water against refractory).

5. Reassemble. When heater is fired, some steamwill form from wet refractory. This is normal.

Combustion Chamber Removal

To remove the combustion chamber, you must firsthave removed the heat exchanger. Unbolt metal com-bination chamber retainer from top and removecombustion chamber panels individually.

CAUTION: Soot is combustible. exercise extremecare.

Control Immersion Well Replacement

Remove top, sensing bulb and clip. Collapse well tubeat the open end with a chisel, push through into headerand remove the header. Insert a new well and roll intoplace. If a roller is not available, solder or braze.

Unitherm Governor (U.G.) Replacement

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

2. Drain heat exchanger.

3. Loosen and remove (2) bolts that secure U.G.Assembly to header.

4. Remove U.G. Assembly with gasket.

5. Reverse above procedure to re-install.

To test the operation of the Unitherm Governor, placein hot water (over 100°F) and watch for movementagainst spring. If there is not movement, replace unit.

NOTE: In extreme cases it may be necessary toremove the heat exchanger completely for cleaning.The simplest method is steam cleaning at the localcar wash. DO NOT WIRE BRUSH.

Fig. 35: Refractory Panels—Top View

Fig. 36: Immersion Well

INLET/OUTLETHEADER

UNITHERMU.G. GASKET GOVERNOR

Fig. 37: Location of U.G.

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IMPORTANT NOTICEThese instructions are primarily intended for the use of qualified personnel specifically trained and experienced in the installationof this type of heating equipment and related system components. Installation and service personnel may be required by somestates to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to theseinstructions.

MECHANICAL (FOR QUALIFIED SERVICE PERSONNEL ONLY)

(*Usually occurs on initial start-up)

PROBLEMHarmonics, or whining noise.

Heater going on and off continuously.

Liming or scale forming on heatexchanger.

Sooting

Pilot outage.

Yellow lazy flame

Outer jacket very hot(paint blistered)

Takes long time to heat pool or spa.

CAUSEU.G. inoperative………………………………

* Debris or restriction in system………………

* Debris in gas line………………………………Low flow………………………………………

Dirty filter………………………………………Low water level in pool………………………External bypass setting out ofadjustment…………………………………….

* Pressure switch out ofadjustment……………………………………..

Pool water………………………………………

High flow rates…………………………………

U.G. Inoperative………………………………

* Air starvation……………………………………* Improper venting………………………………* Insects or debris clogging

burner intake ports……………………………

Low gas pressure………………………………Restricted pilot………………………………..Weak pilot generator…………………………

Low gas pressure………………………………* Insects or debris clogging

burner intake ports……………………………

* Broken refractory caused byshipping damage or improper combustion……Excessive sooting of heatexchanger……………………………………...Calculate temperature in °/hr…………………

Filter not running long enough………………Dirty filter………………………………………Gas line or meter undersized…………………

SOLUTIONCheck movement by putting in hot water (110°For higher). If no movement, replace.Locate the restriction and remove. Flush systemand clean.Remove debris or blow out gas line.Scale forming in heat exchanger-clean heatexchanger and check pool pH and total alkalinity.

Backwash filter.Raise water level.

Adjust bypass

Adjust pressure switch

See Water Chemistry page 2.

Reduce by adding manual bypass valve andadjust by putting thermometer in header (1/4”NPT) drain opening. Set bypass so thermometerreads between 105° and 110°F.Check movement by putting in hot water (110°or higher). If no movement, replace.Refer to installation instructions.Follow recommended installation instructions.

Clean burners.

Adjust gas pressure.Clean pilot.Replace pilot.

Adjust gas pressure.

Clean burners.

Replace refractory panels.

Determine cause of sooting & correct.Heat rise (°/hr.) = Heater output ÷ (Pool gallonagex 8.33) or refer to heater sizing chart.This does not take into account heat loss dueto weather.Reset time clock.Clean filter.Refer to installation instructions.

Troubleshooting

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Inspect bypass for movement, if nomovement, replace.Replace if no movement when heated.

Replace well and maintain waterchemistry properly.

Replace heat exchanger and maintainchemistry properly.

See pressure switch adjustment.Replace refractory.Determine cause of sooting and correct.

Bypassing too much water……………………

U. G. not functioning…………………………

Overacid………………………………………

Overacid………………………………………

Heater running after pump shuts off…………Refractory damage……………………………Sooted heater…………………………………

Liming

Leaking at well.Leaking at heat exchanger.

Gasket brittle and leaking (overheated).

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Intermittent Pilot SystemTROUBLESHOOTING HONEYWELL S8600 IGNITION MODULE

NOTE:Before troubleshooting, familiarize yourself with the startup and checkoutprocedure.

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

Pull ignition lead and check spark at module.

Spark Okay?YES

• 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 module and pilot operator on gas control.• Check for 24 Vac across PV-MV/PV terminals on module. If voltage is okay, replace gas control; if not, replace module.

NOTE:If S8600H goes into lockout, reset system. Lockout is used on Pro. models.

• Check continuity of ignition cable and ground wire.• Clean flame rod.• Check electrical connections between flame rod and module.• Check for cracked ceramic flame rod insulator.• Check that pilot flame covers flame rod and is steady and blue.• Adjust pilot flame.• If problem persists, replace module.

• Check for 24 Vac across MV-MV/PV terminals. If no voltage, replace module.• Check electrical connections between module and gas control. If okay, replace gas valve or gas control operator, i.e. pilot gas valve, flow switch etc.

NOTE: IF S8600H 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 module.

• Check for proper thermostat (controller) operation.• Remove MV lead at module; if valve closes, recheck temperature controller and wiring; if not, replace gas valve.

Repeat procedure until troublefree operation is obtained.

STARTTURN GAS SUPPLY OFF.

TURN THERMOSTAT(CONTROLLER) TO CALL

FOR HEATPOWER TO MODULE

(24 V NOMINAL)YES

SPARK ACROSSIGNITER/SENSOR GAP

YES

TURN GAS SUPPLY ONPILOT BURNER LIGHTS?

YES

SPARK STOPS WHENPILOT IS LIT?

YES

MAIN BURNER LIGHTS?YES

SYSTEM RUNS UNTILCALL FOR HEAT ENDS?

YES

CALL FOR HEAT ENDSSYSTEM SHUTS OFF?

YES

TROUBLESHOOTINGENDS

NO

NO

NO

NO

NO

NO

NO

ELECTRICAL

WARNING: HIGH VOLTAGE. For qualifiedtechnicians ONLY.

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

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Replacement Parts

Any part returned for replacement under standardcompany warranties must be properly tagged withRAYPAK return parts tag, completely filled in with theheater serial number, model number, etc., and shippedto the Company freight prepaid.

If determined defective by the Company and withinwarranty, the part will be returned in kind or equal sub-stitution, freight collect. Credit will not be issued.

Raypak, Inc.2151 Eastman Avenue

Oxnard, CA 93030

NOTE: To supply the correct part it is important thatyou state the model number, serial number and typeof gas when applicable.

Replacement parts for the 514-824 RaythermSwimming Pool Heaters may be found in Raypak’sIllustrated Parts List, Catalog No. 9100.60, which isavailable at the Raypak website:

http://www.raypak.com/

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34

35

36

www.raypak.com Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (805) 278-5468

Litho in U.S.A.