Rheem Versa Spa Heaters Operating Instructions Manual

INSTRUCTIONS CATALOG NO. 6100.52U Effective: 04-20-09 Replaces: 02-29-08 P/N 240428 Rev. 22 WARNING: If the information in these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury or death. FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors and liquids 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 or the gas supplier. This manual should be maintained in legible condition and kept adjacent to the heater or in another safe place for future reference. Model 055B Versa™ Spa Heater

4 WATER CHEMISTRY 5 OWNER'S OPERATING INSTRUC- TIONS 6 Start-Up Procedures 6 Water Temperature Safety 9 MAINTENANCE AND CARE PROCE- DURES 9 Basic Tips if Heater Will Not Fire 9 Pool & Spa Water Chemistry 10 Cold Weather Operation 10 Winterizing the Spa Heater 10 INTRODUCTION 10 Receiving Equipment 10 General Specifications 11 INSTALLATION 11 Code Requirements 11 Base Installation 11 Clearances 11 Outdoor Heaters 13 Indoor Heaters 13 Combustion Air (Indoor Units Only) 13 Vent Piping 14 Vent Terminal Assembly 14 Gas Supply Connections 15 Plumbing for Water Connections 16 Electrical Wiring 18 Wiring Diagram—Millivolt Units with Mechanical Thermostat 20 Wiring Diagram—IID Units 21 SERVICE 22 Controls/Adjustments/ Replacements 22 TROUBLESHOOTING 27 REPLACEMENT PARTS LIST 31 CONTENTS 3

personal injury, death or substantial property damage if ignored. WARNING: Indicates the presence of hazards or unsafe practices which could cause severe personal injury, death or substantial property damage if ignored. CAUTION: Indicates the presence of hazards or unsafe practices which could cause minor personal injury or product or property damage if ignored. NOTE: Indicates special instructions on installation, operation, or maintenance which are important but not related to personal injury hazards. WARNING: Gasoline, as well as other flammable materials and liquids (adhesives, solvents, etc.), and the vapors they produce, are extremely dangerous. Do not handle, use, or store gasoline or other flammable or combustible materials in the vicinity of a heater. WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury or loss of life. Refer to the user's information manual provided with this heater. Installation and service must be performed by a qualified installer, service agency, or the gas supplier. WARNING: To minimize the possibility of improper operation, serious personal injury, fire, or damage to the heater: • Always keep the area around the heater free of combustible materials, gasoline, and other flammable liquids and vapors. • Heater should never be covered or have any blockage to the flow of fresh air to the heater. WARNING - CALIFORNIA PROPOSITION 65: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. CAUTION: Verify proper operation after servicing. WARNINGS - Pay Attention to These Terms 4 WARNING: This unit contains refractory ceramic fiber (RCF) insulation in the combustion chamber. RCF, as manufactured, does not contain respirable crystalline silica. However, following sustained exposure to very high temperatures (>2192F), the RCF can transform into crystalline silica (cristabolite). The International Agency for Research on Cancer (IARC) has classified the inhalation of crystalline silica (cristabolite) as carcinogenic to humans. When removing the burners or heat exchangers, take precautions to avoid creating airborne dust and avoid inhaling airborne fibers. When cleaning spills, use wet sweeping or High Efficiency Particulate Air (HEPA) filtered vacuum to minimize airborne dust. Use feasible engineering controls such as local exhaust ventilation or dust collecting systems to minimize airborne dust. Wear appropriate personal protective equipment including gloves, safety glasses with side shields, and appropriate NIOSH certified respiratory protection, to avoid inhalation of airborne dust and airborne fiber particles. NOTE: Minimum 18 AWG, 105°C, stranded wire must be used for all low voltage (less than 30 volts) external connections to the unit. Solid conductors should not be used because they can cause excessive tension on contact points. Install conduit as appropriate. All high voltage wires must be the same size (105°C, stranded wire) as the ones on the unit or larger.

your heater and associated equipment. Maintain your water chemistry according to Table A. 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. For your health and the protection of your pool equip- ment, it is essential that your water be chemically balanced. The following levels must be used as a guide for balanced water. • 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 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 be obtained from your pool or spa builder, accredited pool shop, or chemical supplier for the correct levels for your water. NOTE: Corrosive water voids all warranties. CAUTION: Free chlorine must not exceed 5 ppm which can damage the heater and void the warranty. Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool and Spa Types 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

debris. Keep heater area clear and free from com- bustibles, flammable liquids and chemicals. Do not obstruct the flow of combustion and ventilation air. Water First thing, ensure that system is filled with water and have pump operating. Water must be flowing through the heater during operation. 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 With the heater on, remove the door and make a visu- al check of the pilot and burner. The flame should be blue with a well-defined pattern. 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 to the heater is interrupted. It is very important to verify that the switch electrically opens and shuts off the gas WARNING: If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or loss of life. WARNING: Should overheating occur or the gas supply fail to shut off, turn off the manual gas control to the appliance. Fig. 1: Versa Heater 4“ MAX Fig. 2: Correct Main Burner Flame Pattern Fig. 3: Millivolt Pilot Burner Flame

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 clock- wise 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 left side of the burner tray. For burner tray location, see General Location of Controls section, page17. HONEYWELL GASVALVE MILLIVOLT ROBERTSHAW GAS VALVE MILLIVOLT A. This appliance has a pilot that must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appli- ance area for gas. Be sure to smell next to 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 neigh- bor's phone. Follow the gas supplier's instruc- tions. LIGHTING INSTRUCTIONS Gas control knobs shown in "Off" position ROBERTSHAW PILOT HONEYWELL PILOT LIGHTING INSTRUCTIONS ANDSHUT-OFFPROCEDURES MANUALLY LIGHTED PILOTS (MILLIVOLT SYSTEM) 8. Turn knob on gas control counter-clockwise to "Pilot". 9. Push in control knob all the way and hold in. Immediately place flame to pilot to light. Continue to hold control knob in for about 1 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. *If the pilot does not stay lit after several tries, turn the gas control knob to "Off" and 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. TO TURN OFF GAS TO APPLIANCE *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 re- place any part of the control system and any gas control which has been under water. 4. Push the gas control knob slightly and turn clockwise to "Off". Do not force. 5. Replace heater door panel. 1. Set the thermostat to the lowest setting. 2. Turn On-off switch to the "Off" position. 3. Removeheaterdoor panel. CAUTION: Propane 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.

confined areas, extra care should be exercised when lighting propane heaters. TO TURN OFF GAS TO APPLIANCE 1. STOP! Read the safety information above. 2. Set the thermostat to the lowest setting. 3. Turn off all electric 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. Push in gas control knob slightly and turn clock- wise to "Off". Knob cannot be turned to "Off" unless it is pushed in slightly. Do not force. 7. Wait 5 minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety infor- mation previously stated. If you don't smell gas, go to the next step. Gas control lever shown in the "On" position. 8. Turn gas control knob counter-clockwise to "On". Gas control knob shown in "ON" position. OPERATING INSTRUCTIONS 9. Replace heater door panel. 10. Turn on all electrical power to 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. 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 next to 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 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 re- place any part of the control system and any gas control which has been under water. OPERATING INSTRUCTIONS AND SHUT-OFF PROCEDURES AUTOMATICALLY LIGHTED PILOTS (ELECTRONIC IGNITION SYSTEMS) 4. Push in gas control knob slightly and turn clockwise to "Off". 5. Replace heater door panel. 1. Set the thermostat at the lowest setting. 2. Turn off all the electric power to the appliance if service is to be performed. 3. Remove heater door panel. GAS VALVE-IID

Otherwise, rapid and severe heater damage will likely occur. (The water pressure switch should be checked and adjusted for proper operation by a qualified serv- ice person at the time of installation and periodically checked thereafter. Refer to pressure switch servicing instructions in this manual.) Water Temperature Safety Elevated water temperature can be hazardous, and the U.S. Consumer Product Safety Commission rec- ommends the following guidelines: 1. Spa or hot tub water temperatures should never exceed 104°F (40°C). A temperature of 100°F (38°C) is considered safe for a healthy adult. Special caution is suggested for young children. 2. Use of drugs and/or alcoholic beverages before or during spa or hot tub use may cause drowsiness which could lead to unconsciousness and subse- quently result in drowning. 3. Pregnant women beware! Soaking in water over 102° F (39°C) may cause fetal damage during the first three months of pregnancy, including brain damage or deformity. Pregnant women should observe 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 drowsi- ness, such as tranquilizers, antihistamines, or anticoagulants, should not use spas or hot tubs. MAINTENANCE AND CARE PROCEDURES To be followed one month after start-up and then semi- annually. 1. Inspect top of heater and drafthood for soot, a sticky black substance found around finned tubes, baffle and open flue gas passageways. 2. Clean main burners and pilot burner of dust and lint. 3. Inspect and operate all controls, gas valve and pressure 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 flame means restriction of the air openings. Lifting or blowing flame indicates high gas pressure. Low flame means low gas pressure. Should this 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 ventila- tion air. 6. Keep area around heater clear and free from com- bustible materials and other flammable and corrosive vapors and liquids. Basic Tips if Heater Will Not Fire If you have no electrical power: 1. The "circuit breakers" may have tripped. Try re- setting them. WARNING: Operation of the heater without water circulation will cause rapid and severe damage to the heater. CAUTION: Soot may be combustible. Wet sooted surfaces completely prior to cleaning. Do not use steel wire brush. CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.

1. The time clock must be moved to the "ON" posi- tion. 2. Your pump strainer basket may be full. If so remove debris. 3. Your filter may be dirty. If so, backwash or clean fil- ter. (If your filter is dirty, the gauge pressure will be higher than usual). 4. The pump may have lost its prime and be running dry. Check the pressure gauge on the filter. If there is no pressure; the water is not moving (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 5. If the mineral content and dissolved solids in the water become too high, scale forms inside the heat exchanger tubes, reducing heater efficiency and also damaging the heater. If the pH drops below 7.2, the heater will be severely damaged. This will result in corrosion of the heat exchanger. Heat exchanger damage resulting from chemical imbalance is not covered by the warranty. Cold Weather Operation Heater operation can continue during short term cold spells. When temperatures are below freezing, flow (continuous pump operation) must be maintained. Prolonged operation with water temperatures below 50°F is not recommended. When starting the heater with pool 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 will void the warranty. For cold climate areas please follow the winterizing procedures listed below. Winterizing the Spa Heater When heaters installed outdoors in freezing climate areas are to be shut down for the winter, observe the following procedure: 1. Turn off gas valve, manual gas valve, and electri- cal supply to the heater. 2. Open drain cock located on the return header. 3. Disconnect compression fittings from the pressure switch and header that connect to the 1/4" copper tube and allow the tube to drain. INTRODUCTION Receiving Equipment 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 and if it is damaged, report the damage to the carrier immediately. On occasion, we ship some items loose. Be sure that you receive the number of packages indicated on the Bill of Lading. When ordering parts, you must specify model and serial number of heater. When ordering under warran- ty conditions, you must also specify the date of installation. 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. CAUTION: Do not use the heater to maintain water temperatures just above freezing, or for freeze protection. When heaters are 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.

the requirements of ANSI Z21.56/CSA 4.7 American National Standard / CSA standards for gas-fired pool heaters. The heater is interchangeable and can be used either indoors or outdoors. The appropriate top designated for that type of use is required. If desired, 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 volts. 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 Electronic Ignition Heaters* -32°F to +175°F *Requires 120V or 240V power supply Rated inputs are suitable for up to 2000 feet elevation. For elevations above 2000 feet, reduce input 4% for each 1000 feet above sea level, as high elevation reduces combustion performance. For Canada, reduce input 10% when installed at 2000-4500 feet elevation. INSTALLATION 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. Code Requirements Installation must be in accordance with local codes, or, in the absence of local codes, with the latest editions of the National Fuel Gas Code, ANSI Z223.1, and the National Electrical Code, ANSI/NFPA 70; for Canada, the latest edition of CAN/CGA B-149. Base Installation Heater must be mounted on a level surface. It can be installed on combustible flooring. Heaters may not be installed on carpeting. Clearances NOTE: These instructions are intended for use by qualified personnel only, 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. 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. NOTE: The heater should not be located in an area where possible water leakage will result in damage to the area adjacent to the appliance or to the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air flow. 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 heavy internal rusting or damage some electrical components, and this would void the warranty.

for burner tray removal, and at least 18" on the left side of the heater to inspect and de-lime the heat exchang- er. Heater Side Min. Clearance from Combustible Surfaces Top* (Drafthood) 35” Vent 6” Back 2” Right Side 6” Left Side 6” Floor 0 U.S. Installation Only 4 foot Minimum 4 foot Minimum 1 foot Minimum 4 foot Minimum 3 foot Minimum 10 foot Minimum Forced Air Inlet *Clearance from Top of Vent Terminal Outdoor Installation For servicing, provide at least 24" in front of the heater for burner tray removal, and at least 18" on the left side of the heater to inspect and de-lime the heat exchang- er. Heaters must not be installed under an overhang of less than three (3) feet from the top of the heater. Three (3) 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 min- imum of four (4) feet below, four (4) feet horizontally Heater Side Min. Clearance from Combustible Surfaces Top* (Stackless Top) Unobstructed Back 2” Right Side 6” Left Side 6” *Clearance from Top of Vent Terminal Table B: Clearances from Combustible Construction Table C: Clearances from Combustible Construction Fig. 4: Outdoor Installation

ty inlet to a building. The top surface of the heater shall be at least three (3) feet above any forced air inlet, or intake ducts located within ten (10) feet horizontally. For installations in Canada, pool heaters shall not be installed with the top of the vent assembly within 10 feet below, or to either side, of any opening into the building. Refer to the latest revision of CAN/CGA- B149. Outdoor Heaters These heaters are design certified for outdoor installa- tion, when equipped with the approved top designated for outdoor use. 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 high vertical walls, or install a wind break so the heater is not in direct wind current. Heater with Outdoor Top Fig. 5: Heater with Outdoor Top WARNING: Do not install within 3 feet of a Heat Pump or an outdoor condensing unit. Strong air intake from this equipment can disturb the combustion process and cause damage or personal injury. Indoor Heaters The design is also 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 occupied area. Refer to the latest edition of CAN/ CGA B-149 for specific requirements.Locate heater as close as practical to a chimney or gas vent. Heater must always be vented to the outside. See Vent Piping sec- tion for venting details. Minimum clearances are shown on the nameplate. Combustion Air (Indoor Units Only) Air for Combustion and Ventilation (Indoor Units Only) The heater must have both combustion and ventilation air. Minimum requirements for net free air supply openings are one 12 inches from ceiling for ventilation and one 12 inches from the floor for combustion air as outlined in the latest edition of the National Fuel Gas Code, Z223.1(Canada-CAN/CGA B-149) and any local codes that may have jurisdiction. a. All Air from Inside the Building: Each opening shall have a minimum of 50 net free square inches. b. All Air from Outdoors: When air is supplied directly from outside of the building, each opening shall have a minimum of 13 net free square inches. Heater with Indoor Top Fig. 6: Heater with Indoor Top CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.

Outdoor 1. Remove the (4) screws which fasten jacket top to heater. 2. Lower outdoor top onto unit lining up slots in out- door top with screw holes in jacket top. 3. Reinstall (4) screws to secure jacket top and out- door top to unit. Indoor Locate and assemble as shown. Secure with screws supplied in envelope inside carton. Outdoor Top Jacket Top Fig. 7: Heater with Outdoor Top Drafthood Mounting Screws Fig. 8: Heater with Indoor Top Vent Piping Vent piping the same size or larger than the drafthood outlet is recommended, however, when the total vent height is at least ten (10) feet (drafthood relief opening to vent terminal), the vent pipe size may be reduced as specified in Chapter 10 of the latest edition of the National Fuel Gas Code, ANSI Z223.1 (Canada- CAN/CGA B-149). As much as possible, avoid long horizontal runs of vent pipe and too many elbows. If installation requires horizontal or or non-vertical runs, the vent pipe must have a minimum of 1/4 inch per foot 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 extend- ing 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 spacer through the roofs and walls. For protection against rain or blockage by snow, the vent pipe must terminate with a vent cap which com- plies 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 B-149). The discharge opening must be a minimum of 2 ft. ver- tically from the roof surface and at least 2 ft. higher than any part of the building within ten feet. Vent stack shall be at least five feet 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 above or below, unless a 4-foot horizontal dis- tance 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 sup- ported to maintain proper clearances from supported to maintain proper clearances from combustible con- struction. WARNING: Indoor boilers 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.

mended. 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 B- 149). Gas Supply Connections Gas piping must have a sediment trap ahead of the heater gas controls, and a manual shut-off valve locat- ed outside the heater jacket. All gas piping should be tested after installation in accordance with local codes. 5' MIN 2' MIN 10' OR LESS 2' MIN VENT CAP VENT PIPE DRAFT HOOD HEATER Fig. 9: Venting Clearances A minimum of 7" WC and a maximum of 10.5" WC upstream pressure under load, and no load conditions must be provided for natural gas, or a minimum of 12" WC and a maximum of 13" WC for propane. Gas Pressure Regulator SUPPLIED BY OTHERS GAS FLOW UNION SEDIMENT TRAP MANUAL SHUT-OFF VALVE Fig. 10: Sediment Trap 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 PRESSURED 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. NOTE: Do not use teflon tape on gas line pipe thread. A flexible sealant is recommended. Model 1/2” 3/4” N P N P 055B 90 200 200 250 Natural Gas, 1000 BTU/FT3 .60 specific gravity @ 0.5” WC pressure drop Propane Gas, 2500 BTU/FT3 1.53 specific gravity @ 0.5” WC pres- sure drop Table D: Maximum Equivalent Pipe Length The gas pressure regulator is preset and sealed at 4" WC for natural gas, and 11" WC for propane. 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" WC natural gas and 10.5" WC propane. If an adjustment is needed, remove seal and turn adjust- ment screw clockwise to increase pressure or counter-clockwise to decrease pressure.

Gas Pressure Test at Heater Gas Pressure Adjustment Fig. 11: Gas Pressure Testing Locations Fig. 12: Robertshaw Millivolt Valve Gas Pressure Adjustment Fig. 13: Honeywell Millivolt Valve Gas Pressure Adjustment Fig. 14: Honeywell IID Valve Plumbing for Water Connections Location The VERSA 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 spa. The pump, filter and heater are thus plumbed in series. Plumbing from the heater back to the spa must not have any valves or restriction that could prevent flow when the pump is operating. To do so will void the war- ranty. Heater must be located so that any water leaks will not damage the structure of adjacent area. High tempera- ture plastic pipe (CPVC) may be connected directly into the heater if local codes permit.

The inlet/outlet header flange accepts a 1-1/2" copper tube or 1-1/4" galvanized pipe as a slip connection directly into the manifold. The flange is also threaded for 1-1/2" pipe thread. 1-1/2" CPVC adapters (when available) can also be used. DO NOT use petroleum base assembly fluids (such as petroleum jelly or lubricating oil). If assembly lube is required, use a silicone-based compound, such as Amoral, etc. Pipe Size Min. gpm Max. gpm 1-1/4” 20 60* 1-1/2” 20 60* *When flow rates exceed 60 gpm, an external auxiliary bypass valve is required. See External auxiliary bypass valve section for details. Table E: Flow Rates Inlet/Outlet Header Flange Gasket Header Flange Pipe Fig. 15: Header Connections Automatic Chlorinators and Chemical Feeders All chemicals must be introduced and completely dilut- ed into the pool or spa water before being circulated through the heater. Do not place chlorine tablets or bromine sticks in the skimmer. High chemical concen- trations 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 backup into the heater when the pump is shut-off. Unitherm Governor Operation The patented Unitherm Governor is a thermostatic mixing valve specifically designed to maintain constant heater internal temperature between 105 - 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 scal- ing temperatures. CAUTION: Never install PVC directly into header flanges. The initial connection must be made with a high temperature material such as CPVC or Copper. For IID Pilots: PVC may be utilized immediately after the initial connections. For Standing Pilots: Copper or high temperature CPVC pipe and two elbows are required between the heater and the PVC connections (heat sinks not supplied). NOTE: High chemical concentration from feeders and chlorinators that are out of adjustment will cause very rapid corrosion to the heat exchanger in the heaters. Such damage is not covered under the warranty. Outlet Inlet Unitherm Governor Fig. 16: Unitherm Governor Location

(Where Required) An auxiliary bypass valve should be used when flow rates exceed 60 gpm (usually a high performance pump size larger than 1-1/2 HP will exceed this flow rate). This valve is required to complement the func- tion of the automatic bypass valve, particularly when starting the heater in winter or early spring when the spa or pool temperature is down below 55°F. It also serves to eliminate needless pressure drop through the heater and accompanying reduction in the flow rate to the spa jets, etc. 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 comfort- able 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 neces- sary to install a pressure relief valve. A 3/4" pressure relief valve having a capacity equal to BTUH/HR out- put of the model to be installed is recommended for this appliance. Electrical Wiring Millivolt System The Millivolt System Residential Heater is equipped with a self-generating electrical system in which the electric current is provided by means of a pilot gener- ator. 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. Electronic Intermittent Ignition Device (IID) System The Electronic Intermittent Ignition Device automati- cally lights the pilot and main burners upon a call for the heat. The heater is supplied with a dual-voltage transformer for 120V or 240V input power hookup. From Heater To Heater lo o P m o r F lo o P o T Auxiliary Bypass Valve (do not use gate valve) Fig. 17: Auxiliary Bypass Valve Drain Pipe Drain Pipe Heater Outlet Heater Outlet Fig. 18: Pressure Relief Valve Installation 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. NOTE: If it is necessary to replace any of the original wiring, it must be replaced with 105°C wire or its equivalent, except all black wire must be replaced with 150°C wire or its equivalent. NOTE: When the electrical hookup to the heater requires both 24V and 120V or 240V, each input voltage must be isolated in a separate conduit. NOTE: IID Propane Units Only Heater is equipped with an electronic ignition device with a 100% safety lockout feature. If the heater fails to start or lockout, reset the ignition device by interrupting the power to the heater for 60 seconds. CAUTION: If service replacement of the electronic ignition device is required, replace only with a 100% safety lockout device with 90-second trial for pilot ignition.

For 120 V 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 “L2”, 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 120V oper- ation. For 240 V 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 240V operation. 120V ATMOSPHERIC HEATER 120V LOW NOx HEATER SUPPLY SIDE RETURN or NEUTRAL HEATER 4 WIRES H GROUND L L1 RED BLACK B HOT BLACK GREEN GREEN WHITE WHITE Fig. 20: 120V Wiring 240V ATMOSPHERIC HEATER HEATER 4 WIRES L1 L2 RED RED BLACK HOT HOT BLACK GREEN GREEN WHITE SUPPLY SIDE Fig. 21: 240V Wiring NOTE: Input power to the heater (120/240V) should be supplied from the load (pump) side of time clock or switch. Connecting heater to continuous power source will allow "Fail" indications (service and pressure switch) when pump is not operating. SPK WIRING DIAGRAM KEY 0 0 6 8 S 6 8 S PINK CONNECTOR BLUE CONNECTOR CAUTION: 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).

IN/OUT If required by local code, install at this location.

mostat on the upper front panel of the heater. The control center contains an On-Off toggle switch and a thermostat. The switch functions as a means for turn- ing the heater on or off. The thermostat is fitted with a means of limiting the upper temperature limit below the maximum level. The knob stop adjustment ring illustrated above is adjustable by loosening the set screw, rotating the knobstop ring to the desired location and retightening the set screw. Drain Valve Solid State Thermostat & Ignition Control Pressure Switch Burner & Pilot Thermal Fuse HIGH LIMITS (Located in the Inlet/Outlet header) Gas Valve CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. DANGER - SHOCK HAZARD - Make sure electrical power to the heater is disconnected to avoid potential serious injury or damage to components. Knobstop Ring Set Screw Typical Comfortable Pool Temperature Range Typical Comfortable Spa Temperature Range Fig. 22: Knobstop Setting Fig. 23: General Location of Controls

the heater operates only when the filter pump is in operation. 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 reset the pressure switch to compensate for the no-flow static head. If it is necessary to reset the pressure switch, we recommend the following procedure. 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 steps above until proper adjustment is made. Adjustment Knob Heat Exchanger Height Heat Exchanger Height Pool or Spa Fig. # 8152.0s 5' Max. 5' Max. Two-Speed Pumps In some cases, the flow on the low-speed is insuffi- cient to operate the heater. This is apparent when the pressure switch cannot be further adjusted or if the heater makes banging noises. In these cases, the pump must be run at high speed when heating the water. Flame Roll-Out Safety Switch The heater is equipped with a thermal cut-off device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is a "single-use" type fusible link or thermal fuse, that must be replaced when dis- abled by an over temperature condition, caused by excessive restriction in the heat exchanger flue pas- sage. High Limits The heater is equipped with two automatic high limits, set to operate at 135°F and 140°F. Fig. 24: Pressure Switch Adjustment Fig. 25: Above/Below Installation Limits NOTE: If heater is installed outside of the limits shown, a flow switch must be used in place of the pressure switch when mounted and wired adjacent to the heater. CAUTION: Do not operate the heater without the function of a properly adjusted pressure switch. Fig. 26: Flame Roll-Out Safety Switch Fig. 27: High Limit

1. Disconnect top portion of unit. (See Heat Exchanger Removal procedure, steps 1 thru 7 and step 10.) 2. Remove defective high limit and replace with new high limit. 3. Reverse above procedure to reinstall. Pilot Safety Millivolt Units The 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 extin- guished. The pilot burner must be manually relighted to place the heater in operation again. Refer to the lighting instructions provided on the heater label. IID Units The heater employs a pilot safety which closes the main gas valve within 8/10ths of a second whenever the pilot flame is interrupted. Pilot flame is automatical- ly lit when the device is powered. Unit performs its own safety check and opens the main valve only after the pilot is proven to be lit. 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 unit. 6. Disconnect wires that terminate at gas valve, and thermal fuse. 7. Slide out burner tray. 8. Reverse above procedure to reinstall. Gas Valve Removal 1. Remove burner tray. (See Burner Tray Removal procedure). 2. Disconnect pilot tubing from gas valve. 3. Remove gas valve with manifold from burner tray. 4. Remove manifold from gas valve. 5. Reverse above procedure to reinstall. NOTE: An erratic high limit is often characteristic of internal heat exchanger problem, e.g. scale build-up, U.G. operation. Refer to Troubleshooting section. Main Burner and Orifice Removal 1. Remove burner tray. (See Burner Tray Removal procedure). 2. Remove screws and burner hold-down bracket. 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 over-tighten when reinstalling. Pilot Removal and Cleaning 1. Remove burner tray. (See Burner Tray Removal procedure). 2. Disconnect pilot tubing, disconnect wires from gas valve (millivolt unit only). 3. Disconnect pilot bracket from burner shield. 4. Remove pilot from bracket. 5. Remove pilot orifice and air opening (Honeywell MILLIVOLT unit only), and clean with wire or small brush. CAUTION! DO NOT enlarge hole in pilot orifice. 6. Reverse above procedure to reinstall. 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. t oli P Air Opening Orifice Fig. 28: Honeywell Pilot

1. Shut water, gas, and electricity off, close valves and relieve pressure. 2. Drain heat exchanger. 3. Loosen and remove flange bolts. 4. Remove flange and inlet/outlet pipes from the header. Remove drain valve from rear header. 5. Remove outdoor stackless top or indoor stack top from unit. 6. Remove jacket top, flue collector, and baffle. 7. Remove upper front jacket panel, and disconnect wires at toggle switch. 8. Remove capillary bulb from inlet/outlet header. 9. Disconnect press switch tube from inlet/outlet header. 10. Disconnect high limit wire from thermostat, and pressure switch. 11. Lift heat exchanger straight up from combustion chamber, using caution not to damage refractory. 12. Reverse above procedure to reinstall. De-sooting Procedure Soot can clog areas between fins and cause eventual tube failure. Any sign of soot at the base of the burn- ers or around the outer jacket indicates a need for cleaning. 1. Disconnect top portion of unit. (See Heat Exchanger Removal procedure steps 1 through 6). 2. Remove burner tray (See Burner tray Removal procedure.) 3. Take a garden hose and wash heat exchanger, making sure soot is removed completely from between fins. Avoid excessive water against refractory. Combustion Chamber Removal 1. Remove heat exchanger (See Heat Exchanger Removal procedure). 2. Lift up and remove front and rear refractory shield. 3. Remove refractory panels. 4. Reverse above procedure to reinstall. CAUTION: Soot is combustible. Exercise extreme care. Never use a wire brush. NOTE: In extreme cases it may be necessary to remove the heat exchanger completely for cleaning. The simplest method is steam cleaning at the local car wash. DO NOT WIRE BRUSH. Fig. 29: Refractory Panel—Top View Control Immersion Well Replacement 1. Remove plumbing and top portion of unit (See Heat Exchanger Removal procedure, steps 1 through 6). 2. Remove U.G. spring, U.G. and copper shield. 3. Collapse well tube at open end with chisel. 4. Push well up through header. 5. Insert new well and roll in place. If a roller is not available, solder the well in place with silver sol- der. Unitherm Governor (U.G.) Replacement 1. Shut water, gas and electricity off, close valves and relieve pressure. 2. Drain heat exchanger. 3. Disconnect inlet and outlet pipes with flange from in/ out header. 4. Grasp retainer spring from inlet side of header, and slide thru inlet hole. 5. Remove shield. 6. Remove U.G. with seating gasket, and stainless steel baffle (not shown). 7. Reverse above procedure to re-install. ImmersionWell Fig. 30: Immersion Well

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.

installation of thistypeof heatingequipment and relatedsystem components. Installationandservicepersonnel may berequiredbysomestatestobelicensed. Persons not qualified shall notattempttoinstallthisequipment norattempt repairs according to these instructions. MECHANICAL 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. *Debrisingasline.............................. Remove debris or blow out gas line. Lowflow.............................................. Scale forming in heat exchanger - clean heat exchanger and check pool pH and total alkalinity. Heater going on and off Dirty filter............................................. Backwash 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 on Pool water chemical imbalance.... See Water Chemistry on page 2. heat exchanger g nit o o S Highflow rates.................................. Reduce by adding manual bypass valve and adjust by putting thermometer in header (1/4" NPT) drain opening. Set bypass so thermom- eter reads between 105° and 110°F. U.G.inoperative................................. Check movement by putting in hot water (110°F or higher). If no movement, replace. *Airstarvation....................................... Refer to installation instructions. *Improper venting............................... Follow recommended installation instructions. *Insects or debris clogging burnerintake ports........................... Clean burners. . e r u s s e r p s a g ts ujd A ............................ e r u s s e r p s a g w o L e g a t u o t oli P Restricted pilot.................................. Clean pilot. Weak pilot generator........................ Replace pilot. Yellow lazy flame Lowgaspressure............................ Adjust gas pressure. *Insects or debris clogging burnerintake 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 long time to heat Undersizedheater............................. Check heat rise per hour with the following pool or spa formula: Heat rise (°/hr.)= Heater Output Pool gallonage x 8.33 Filter not running long enough....... Reset time clock. Dirtyfilter............................................. Clean filter. Gas line or meter undersized......... Refer to installation instructions. (* Usually occurs on initial start-up.) TROUBLESHOOTING

Jump across pressure switch terminals If main burner does not fire, remove jumper Check for adequate water flow from filter Replace pressure switch Jump across thermostat If main burner fires, remove jumper If main burner does NOT fire... Jump across each high limit and remove jumper Replace thermostat Replace high limit that caused heater to fire Jump across both "TH" wires on gas valves Check gas supply, gas line size, gas pressure. Also check for insects or debris in pilot output. If pilot burner does not light Light pilot 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 and the thermostat set higher than the pool water temperature. 3. Jumpers are for temporary check only. If left in place, they could cause the heater to burn up. If pilot burner goes out when main burner lights or when gas valve knob is released If burner does not remain lit, attach millivolt meter and read pilot output. If below 500millivolt, check gas pressure. Also check for insects or debris in the pilot burner If main burner fires, remove jumper Replace gas valve If main burner does not fire, remove jumper Remove both "TH" wires from gas valve. Re-light pilot If pilot burner stays on Problem is a wire or component short to cabinet or low gas pressure If above 500millivolt, replace gas valve Clean filter If main burner fires, remove jumper Leaking at well Overacid.................................. Replace well and maintain water chemistry properly. Leaking at heat exchanger Overacid.................................. Replace heat exchanger and maintain chemistry properly. Gasket brittle and leaking - Heater running after pump (overheated) shuts off................................... See pressure switch adjustment. Refractorydamage..................... Replace refractory. Sooted heater............................ Determine cause of sooting and correct. ELECTRICAL - MILLIVOLT POOL OR SPA HEATER ELECTRICAL CHECK WITHMILLIVOLTGASVALVE If output is still low, replace pilot generator. ,t n e m e v o m o n fi,t n e m e v o m r o f s s a p y b tc e p s n I ............r e t a w h c u m o o t g nis s a p y B g ni m iL replace. U.G. not functioning...................... Replace if no movement when heated.

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. Intermittent Pilot System TROUBLESHOOTING HONEYWELL S8600 NOTE: Before troubleshooting, familiarize yourself with the start-up and checkout procedure. Check line voltage power, low voltage transformer, limit controller, thermostat (controller) 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-MILLIVOLT/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 L.P.G 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 MILLIVOLT-MILLIVOLT/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 MILLIVOLT lead at module; if valve closes, recheck temperature control- ler and wiring; if not, replace gas valve. NO NO NO NO NO NO NO Repeat procedure until trouble-free operation is obtained. START TURN GAS SUPPLY OFF. TURNTHERMOSTAT (CONTROLLER) TO CALL FORHEAT POWER TO MODULE (24 V NOMINAL)? YES SPARKACROSS IGNITER/SENSOR GAP? YES TURN GAS SUPPLY ON PILOT BURNER LIGHTS? YES SPARK STOPS WHEN PILOT IS LIT? YES MAIN BURNER LIGHTS? YES SYSTEM RUNS UNTIL CALL FOR HEAT ENDS? YES CALL FOR HEAT ENDS SYSTEMSHUTSOFF? YES TROUBLESHOOTING ENDS

If the pool/spa/hot tub water is too cold, troubleshoot the system as follows: Check voltage at 24 V terminals. VOLTAGE BETWEEN 21.5-28.5 V. Set control to max. temperature. After 2-3 cycles, check water temperature. TEMPERATURE BELOW 105°F Disconnect sensor leads from circuit board. Measure sensor resistance with ohmmeter. RESISTANCE 1-14k OHMS. Check water temperature; estimate expected sen- sor resistance from chart below. MEASURED AND ESTIMATED RESISTANCE MATCH WITHIN 20 PERCENT. Disconnect potentiometer leads from circuit board. Measure resistance with ohmmeter. If resistance is: 0-100 ohms at minimum setting and 9k to 11k at maximum setting, replace circuit board. Above 11k ohms but less than 15 k ohms, replace potentiometer. Above 15k ohms, fix loose or broken wires; replace potentiometer if necessary. Reconnect all leads and check out system. If the pool/spa/hot tub water is too hot, troubleshoot the system as follows: SENSOR RESISTANCE AT VARIOUS TEMPERATURES Temperature (deg. F) 61 68 70 77 86 88 95 104 106 Resistance (k ohms) 14.92 12.49 11.88 10.00 8.06 7.69 6.53 5.33 5.10 VOLTAGE OUTSIDE RANGE 21.5-28.5 V. Check transformer, 120 V supply, correct as necessary TEMPERATURE 105-106° F. Control ok. RESISTANCE 0 OHMS (SHORT CIRCUIT) Check system for shorted wires or open circuits. Replace sensor if necessary. MEASURED ANDESTIMATEDRESISTANCE DON'T MATCH. Replace sensor. Reconnect all leads and check out system. Check voltage at 24 V terminals. VOLTAGE BETWEEN 21.5-28.5 V. Set control to max. temperature. After 2-3 cycles, check water temperature. TEMPERATURE ABOVE 108°F Disconnect sensor leads from circuit board. Measure sensor resistance with ohmmeter. RESISTANCE 1-14k OHMS. Check water temperature; estimate expected sensor resistance from chart below. MEASURED AND ESTIMATED RESISTANCE MATCH WITHIN 20 PERCENT. Disconnect potentiometer leads from circuit board. Measure resistance with ohmmeter. If resistance is: 0-100 ohms at minimum setting: 9k to 11k at maximum setting, replace circuit board. Above 11k ohms, replace potentiometer. 0 ohms (short circuit), replace potentiometer. Reconnect all leads and check out system. VOLTAGE OUTSIDE RANGE 21.5-28.5 V. Check transformer, 120 V supply, correct as necessary. TEMPERATURE 105-106° F. Control ok. RESISTANCE ABOVE 15k OHMS (OPEN CIRCUIT) OR SHORT CIRCUIT. Fix loose or broken wires. Replace sensor if necessary. MEASURED AND ESTIMATED RESISTANCE DON'T MATCH. Replace sensor. Reconnect all leads and check out system.

you state the model number, serial number and type of gas when applicable. Any part returned for replacement under standard company warranties must be properly tagged with 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, the part will be returned in kind or equal sub- stitution, freight collect. Credit will not be issued. Manufacturer: 2151 EASTMAN AVENUE OXNARD, CA 93030

HONEYWELL IID PILOT Fig # 8132 Fig # 8133 9-P 1-P 12-P 5-P 14-P 13-P 15-P 14-P 7-P 3-P Fig # 240654

004688F 2-B Burner 301210/4 3-B Burner Orifice Nat. #52 (Sea Level)* 350081F/4 Burner Orifice Pro. #62 (Sea Level)* 350086F/4 C CONTROLS 1-C High Limit 135 F 600889B 2-C High Limit 140 F 600890B 3-C Thermostat Control MV (Mechanical) 003346F 8-C Thermostat Control MV (Solid State) 005391F 5-C PC Board 005089B 6-C Potentiometer 005087B 7-C Temperature Sensor 005088B 9-C Thermostat Control IID (Solid State) 005390F 4-C PC Board 005086B 6-C Potentiometer 005087B 7-C Temperature Sensor 005088B G GAS VALVE 1-G Combination Valve Nat. MV 003898F Combination Valve Pro. MV 003899F Combination Valve Nat. IID 003900F Combination Valve Pro. IID 004306F H HEAT EXCHANGER 1-H Heat Exchanger Assy. (Complete) 004694F 2-H Header/Tubed Kit 004695F 3-H Baffle Kit 004715F 14-H U.G. Assy 002546F 4-H Unitherm Governor 600885 5-H U. G. Cap 400734 6-H U. G. Spring 850247 10-H U. G. Gasket 800276 7-H Drain Valve 500719 8-H Sensor Well 007211F 9-H Bulb Retainer clip 300203 13-H Bypass Baffle 306079 11-H Inlet/Outlet Flange 002432F 12-H Flange Gasket 800013B M MISCELLANEOUS COMPONENTS 1-M Pressure Switch 062237B 2-M Pressure Switch Tube Assy. 003543F 3-M Thermostat Knob 006885F 4-M Knob Stop 006886F 5-M Dial Plate MV 900741 Dial Plate IID 900742 6-M Transformer (IID Unit) 006736F 7-M Toggle Switch 650595 8-M Wire Harness MV 004010F Wire Harness IID 004011F 9-M Thermal Fuse 008126F *For altitudes above 2,000 feet above sea level, consult the factory.

600525B Pilot Pro. MV 600575B 3-P Pilot Nat. IID 002003F Pilot Pro. IID 002003F 5-P Pilot Orifice Nat. MV 003901F Pilot Orifice Pro. MV 003902F 7-P Pilot Orifice Nat. IID 003903F Pilot Orifice Pro. IID 004308F 9-P Pilot Generator MV 600019B 11-P Ignition Control IID Nat. 004817B Ignition Control IID Pro. 004818B 12-P Pilot Mounting Bracket MV 004716F 13-P Pilot Mounting Bracket IID 004717F Pilot Tube 004078F 15-P Hi Tension Wire IID 002654B Hi Tension Wire w/Pilot Electrode 007864F R REFRACTORY 1-R Refractory Block Kit 003544F S SHEETMETAL 1-S Jacket Top 002525F 2-S Flue Collector 002530F 3-S Door Assy. 004689F 4-S Upper Jacket Control Panel 003791F 5-S Wiring Box 306094 6-S Poolstat Lock Box Cover 006492 V VENTING 1-V Stackless Top (Outdoor) 003709 2-V Drafthood (Indoor) 003722 CONVERSION KITS** Gas Conversions Nat. to Pro. MV Units 004696B Pro. to Nat. MV Units 004697B Nat. to Pro. IID Units NA Pro. to Nat. IID Units NA ** Gas Conversions are to be done only by a qualified agency.