Atmospheric Above-Ground Pool & Spa Heater

INSTALLATION & OPERATING INSTRUCTIONS CATALOG NO. 6100.59E Effective: 06-24-08 Replaces: 12-12-07 P/N 241255 Rev. 6 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 130A Atmospheric Above-Ground Pool & Spa Heater

2 Rev. 6 reflects the following: a formatting correction to the Clearances section on page 8.

WARNINGS 4 Pay Attention to These Terms 4 WATER CHEMISTRY 5 Automatic Chlorinators & Chemical Feeders 5 SAFETY 6 Water Temperature Safety 6 INTRODUCTION 6 Ratings & Certifications 6 Model Identification 7 Specifications 7 Unpacking 7 INSTALLATION 8 Installation Codes 8 Clearances 8 Base Installation 8 Outdoor Installation 8 Indoor Installation 10 Combustion & Ventilation Air 10 Gas Connections 11 Water Connections 13 Electrical Connections 15 Control Adjustments—Millivolt 16 Wiring Diagrams 17 Post Start-Up Inspection 20 Cold Weather Operation 20 MAINTENANCE 21 SERVICE 21 Water Pressure Switch 21 Flame Roll-Out Safety Switch 22 High Limits 22 Pilot Safety—Millivolt Models 22 Burner Tray Removal 22 Gas Valve Removal 24 Main Burner & Orifice Removal 24 Igniter Removal & Cleaning (Electronic) 24 Ignition Control Fault Codes 24 Pilot Removal & Cleaning (Millivolt) 25 Heat Exchanger Removal 25 Tube Cleaning Procedure 25 De-sooting Procedure 25 Immersion Well Replacement— Millivolt26 Replacement Parts 26 TROUBLESHOOTING 27 Mechanical 27 Electrical 28 General—Heater Will Not Fire 30 Electronic Control Logic Flowchart 30 ILLUSTRATED PARTS LIST 31 CONTENTS 3

DANGER: Indicates the presence of immediate hazards which will cause severe 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. DANGER: Failure to install the drafthood on indoor installation and properly vent the heater to the outdoors as outlined in the venting section of this manual can result in unsafe operation of the heater. To avoid the risk of fire, explosion, or asphyxiation from carbon monoxide, never operate this heater unless it is properly vented and has an adequate air supply for proper operation. Be sure to inspect the vent system for proper installation at initial start-up; and at least annually thereafter. Refer to the venting section of this manual for more information regarding vent system inspections. 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.

5 WATER CHEMISTRY Chemical imbalance can cause severe damage to 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 equipment,      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 chlorinators         are usually more efficient in heated water, unless controlled, they can lead to excessive chlorine     level which can damage your heater. • Further advice should be obtained from your pool or spa builder, accredited pool shop, or chemical supplier for the correct levels for your water. Automatic Chlorinators & Chemical Feeders All chemicals must be introduced and completely diluted   into the pool or spa water before being circulated through the heater. Do not place sanitizing chemicals in the skimmer. High chemical concentrations will result when the pump is not running (e.g. overnight). Chlorinators must feed downstream of the heater and have an anti-siphoning device to prevent chemical back-up into the heater when the pump is shut off. See Fig. 1. NOTE: Corrosive water voids all warranties. CAUTION: Free chlorine must not exceed 5 ppm which can damage the heater and void the warranty. NOTE: High chemical concentrates from feeders and chlorinators that are out of adjustment will cause rapid corrosion to the heat exchanger. Such damage is not covered under the warranty. 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

6 Skimmer Pool Check Valve Check Valve Pump Filter Heater Auto-Chlorinator Return to Pool Fig. 1: Pool/Chlorinator Setup SAFETY This appliance is to be installed and operated by trained personnel in accordance with this Installation and Operation Manual. Be sure to read and understand      the entire Installation and Operation Manual before attempting to install or operate this appliance. Failure to follow the warnings listed at the beginning of this manual could result in a fire or explosion, causing property damage, bodily injury, or death. Should you have any problems understanding the warnings and instructions in this manual, STOP, and get help from a qualified installer, service technician, or the gas supplier. Water Temperature Safety Elevated water temperature can be hazardous. The U.S. Consumer Product Safety Commission has these guidelines: 1. Spa water temperatures should never exceed 104°F (40°C). A temperature of 100°F (38°C) is considered safe for a healthy adult. Special caution     is suggested for young children. 2. Drinking of alcoholic beverages before or during spa or hot tub use may cause drowsiness which could lead to unconsciousness and subsequently 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 resulting in the birth of a brain-damaged or deformed child. Pregnant women should stick to the 100°F (38°C) maximum rule. 4. Before entering the spa or hot tub, users should check the water temperature with an accurate thermometer; spa or hot tub thermostats may err in regulating water temperatures by as much as 4°F (2.2°C). 5. Persons with a medical history of heart disease, circulatory problems, diabetes, or blood pressure problems should obtain a physician's advice before using spas or hot tubs. 6. Persons taking medications which induce drowsiness,      such as tranquilizers, antihistamines, anticoagulants, or recreational drugs should not use spas or hot tubs. INTRODUCTION Ratings & Certifications This pool & spa heater is design-certified and tested under the latest requirements of ANSI Z21.56 / CSA 4.7 Standard for Gas-Fired Pool Heaters. The heater can be used either indoors or outdoors. If necessary, the top of the heater can be changed after installation to accommodate indoors or outdoors.

7 WARNING: Use of any parts not manufactured and/or approved by the manufacturer will void the warranty. Ambient Temperature Rating of Components • Millivolt heater +32°F to +175°F • Electronic heater only -40°F to +175°F Model Identification The model identification number and heater serial number are found on the heater rating plate. The model identification number will be similar to PR130A- EN-X, where: • "EP" designates an Electronic heater using Propane gas • "EN" designates an Electronic heater using Natural gas • "MP" designates a Millivolt heater using Propane gas • "MN" designates a Millivolt heater using Natural gas • "P" prefix designates plastic (Polymer) headers • "X" suffix designates Cupro-Nickel tubing • "C" suffix designates Copper tubing Heater Rating Plate Fig. 2: Location of Heater Rating Plate Specifications Unpacking On receipt of the heater it is suggested that visual checks are made for external damage to the shipping carton. If the carton is damaged, make a note to that effect on the Bill of Lading when signing for the shipment.      Remove the heater from the shipping packaging. Report any damage to the carrier immedi- ately. On occasion, items are shipped loose. Be sure that the correct number of packages are received, as indicated on the Bill of Lading. Claims for shortages and damages must be filed with the carrier by consignee. Authorization to return goods must be received from the factory prior to shipping. Goods returned to the factory without an authorized Returned Goods Receipt number will not be accepted. All returned goods are subject to a restocking charge. When ordering parts, specify the model and serial number of the heater. When ordering under warranty conditions, specify the date of installation. Records of the installation must be provided, when requested, to substantiate a claim. Debits for defective replacement parts will not be accepted and will only be replaced in kind per the manufacturer's standard warranties. Model No. Input (BTUH) Gas Conn. (NPT) Water Conn. Shipping Weight, Std. Heater w/Stackless Top 130A 130,000 1/2 in. 1-1/2 in. or 2 in. NPT 140 lbs. Table B: 130A Specifications

8 INSTALLATION Installation Codes Installations must be in accordance with local, state, provincial, and national codes, laws, regulations and ordinances. In the absence of local codes, installations must be in accordance with the latest editions of the: • National Fuel Gas Code, ANSI Z223.1/NFPA 54 • National Electrical Code, ANSI/NFPA 70 • For Canada only: CAN/CGA B149 installation Code (B149) and CSA C22.1 C.E.C. Part 1 and Part 2 Clearances The required minimum clearances from combustible surfaces are shown in Table C below. When installed according to the listed minimum clearances      from combustible construction, the pool heater can be serviced without removing permanent construction          around the heater. However for ease of servicing, we recommend a clearance     of at least 24" in the front, and at least 18" on the rear. This will enable the heater to be serviced in its installed location, that is, without movement or removal of the heater. Heater Side Outdoor Installations Indoor Installations Top* Unobstructed 42 in. Front 6 in. Alcove Vent N/A 6 in. Back 12 in. 12 in. Right Side 6 in. 6 in. Left Side 6 in. 6 in. *Clearance from top of vent terminal. Table C: Required Minimum Clearances from Combustible Surfaces. 12" Minimum 12" Minimum 4" Minimum HEA TER Sheet Metal 24 Gauge Hollow concrete cinder block, align holes and leave ends open. Fig. 3: Alternate Method for Providing a Non- Combustible Base Clearances less than these may require removal of the heater to service either the heat exchanger or the burner tray. In either case, the heater must be installed in a manner that will enable the heater to be serviced without removing any structure around the heater. Base Installation Heater must be mounted on a level base , such as cementable slab, cement blocks or another non-combustible         surface . An alternate method for providing a base for combustible floors is illustrated. Heaters may not be installed on carpeting. Outdoor Installation NOTE: This heater is design-certified for outdoor installation when equipped with the approved top(s) for outdoor use. WARNING: The heater should not be located in an area where water sprinklers, or other devices, may cause water to spray through the cabinet louvers and into the heater. this could cause internal rusting or damage electrical components, and void the warranty. WARNING: Do not install within 3 feet of a heat pump or an outdoor condensing unit. strong air intake from this type of equipment can disturb the combustion process and cause damage or personal injury NOTE: The heater should not be located in an area where possible water leakage will result in damage to the area adjacent to the heater or to the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, with adequate drainage, be installed under the heater. The pan must not restrict combustion air flow.

9 Fig. 4: 130A Dimensions Heater with Outdoor Stackless Top Heaters must not be installed under an overhang of less than 3 ft from the top of the heater. Three sides must be open in the area under the overhang. Roof water drainage must be diverted away from heaters installed under overhangs with the use of gutters. • For U.S. installations, the point from where the flue products exit the heater must be a minimum of 4 ft below, 4 ft horizontally from, or 1 ft above any door, window or gravity inlet into any building. The top surface     of the heater shall be at least 3 ft above any forced air inlet, or intake ducts located within 10 ft horizontally. See Fig. 7 • For installations in Canada, pool heaters shall not be installed with the top of the vent assembly within 10 ft below, or to either side, of any opening into the building. Refer to the latest revisions of CAN/CGA- B149 Outdoor High-Wind Top High Wind Conditions (Outdoor Units Only) In areas where high winds are frequent, it may be necessary       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. In areas of daily high winds, it may be necessary to replace the outdoor stackless top with a stack adapter in combination with a wind-resistant/weather-proof outdoor stack. See Fig. 5. The outdoor stack serves the same function as the low profile stackless top and should be installed in accordance      with the same clearance requirements. Follow the installation instructions provided with the High Wind Kit for installation. NOTE: The outdoor high-wind top is optional equipment and does not come standard with the heater. Use the following part numbers: P/N 004301 (Green), P/N 011558 (Gray) HIGH-WIND TOP Fig. 5: Outdoor High-Wind Top

10 Indoor Installation The heater is design-certified for indoor installation when equipped with the approved drafthood. Locate heater as close as is practical to a chimney or gas vent. Heater must always be vented to the outside.      See Vent Piping section for details. Minimum allowable space is shown on the nameplate. Follow the installation instructions provided with the Indoor Drafthood Kit for installation. Indoor Drafthood Combustion & Ventilation Air (Indoor Units Only) The heater must have both combustion and ventilation air. Minimum requirements for net free air supply openings are one opening that is 12 inches from the ceiling for ventilation, and one opening that is 12 inches   from the floor for combustion air as outlined in the latest edition of the National Fuel Gas Code, ANSI Z223.1(Canada-CAN/CGA-B149) and any local codes that may have jurisdiction. NOTE: For Canada, indoor installation is restricted to an enclosure that is not occupied and does not directly communicate with an occupied area. Refer to the latest edition of CAN/CGA-B149 for specific requirements. Indoor Drafthood Fig. 6: Indoor Drafthood NOTE: The indoor drafthood is optional equipment and does not come standard with the heater. Use the following part number: P/N 003723. All Air From Inside the Building Each opening shall have a minimum net free area of 130 sq. in. All Air From Outdoors When air is supplied directly from outside of building, each opening shall have a minimum net free area of 33 sq. in. Vent Piping Vent piping the same size as the drafthood outlet is recommended, however, when the total vent height is at least 10 ft (drafthood relief opening to vent terminal), the vent pipe size may be reduced as specified in the National Fuel Gas Code, ANSI Z223.1 (Canada - CAN/CGA-B149). As much as possible, avoid long horizontal runs of vent pipe and too many elbows. If installation requires horizontal runs, the vent pipe must have a minimum of 1/4 in. per ft rise and should be supported at not more than five foot intervals. Plumbers tape, criss-crossed, will serve to space both horizontal and vertical piping. Gas vents supported   only by the flashing and extending above the roof more than five feet should be securely guyed or braced to withstand snow and wind loads. We recommend     use of insulated vent pipe spacers through the roof and walls. For protection against rain or blockage by snow, the vent pipe must terminate with a vent cap which complies      with local codes or, in the absence of such codes, the latest edition of the National Fuel Gas Code, ANSI Z223.1 (Canada - CAN/CGA-B149). The discharge opening must be a minimum of 2 ft vertically        from the roof surface and at least 2 ft higher than any part of the building within 10 ft. Vent stack shall be at least 5 ft in vertical height above the drafthood outlet.     The vent cap location shall have a minimum clearance of 4 ft horizontally from, and in no case below, unless a 4 ft horizontal distance is maintained, from electric meters, gas meters, regulators and relief equipment. CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty. Do not store chlorine, bromine, baquasil or acid in the same room as the heater.

11 4 ft Minimum 4 ft Minimum 1 ft Minimum 4 ft Minimum 3 ft Minimum 10 ft Minimum Forced Air Inlet Fig. 7: Outdoor Installation Clearances Fig. 8: Vent Piping Requirements The weight of the vent stack or chimney must not rest on heater drafthood. Support must be provided in compliance with applicable codes. The heater top and drafthood must be readily removable for maintenance and inspection. Vent pipe should be adequately supported       to maintain proper clearances from combustible construction. Type "B" double-wall or equivalent vent pipe is recommended.        However single-wall metal vent pipe may be used as specified in the latest edition of the National Flue Gas Code ANSI Z223.1 (Canada - CAN/CGA- B149). Gas Connections Gas piping must have a sediment trap ahead of the heater gas controls, and a manual shut-off valve located   outside the heater jacket. All gas piping should be tested after installation in accordance with local codes. CAUTION: Do not use 5, 10 or 20 gallon propane tanks, like those used with consumer bar-b-ques, to supply gas to this heater. 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 (3.5 kPa). 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.

12 (field supplied) (field supplied) (field supplied) Fig. 9: Gas Line Sediment Trap NOTE: Do not use Teflon tape on gas line pipe thread. A flexible pipe sealant suitable for LP gases is recommended. Gas Pressure Regulator If adjustment is needed, remove seal and turn adjustment     screw clockwise to increase pressure or counter-clockwise to decrease pressure. Gas Pressure*Natural Gas Propane Gas Max. Inlet (static) 10.5 in. WC 13 in. WC Min. Inlet (dynamic) 7 in. WC 11 in. WC Manifold Gas (dynamic) 3.5 in. WC 10 in. WC *Static means without heater operating, dynamic refers to heater operating. Table D: Gas Pressure Gas Pressure Adjustment Locations Gas Pressure Adjustment A. Gas Pressure Adjustment B. C. Gas Pressure Adjustment Fig. 10A: Honeywell DSI VR 8205 Gas Valve Fig. 10B: Robertshaw MV Gas Valve Fig. 10C: Honeywell MV Gas Valve

13 Electronic Ignition Gas Valves Manual Shut-Off Valve Manometer Gas Pressure Test at Gas Valve Fig. 11: Location of Gas Pressure Adjustment Pipe Sizing for Gas Connections Water Connections The heater requires water flow and positive pressure to fire and operate properly. It must therefore be installed downstream of the discharge side of the filter pump. A typical installation is plumbed as follows: 1. The inlet side of the filter is plumbed directly to the discharge side of the filter pump; 2. The outlet side of the filter is then plumbed to the inlet of the heater; and 3. The outlet of the heater is plumbed to the return line to the pool or spa. The pump, filter and heater are thus plumbed in series. Model No. Input (KBTU) 1/2 in. 3/4 in. 1 in. N P N P N P 130A 130 15 35 60 145 200 500 Natural Gas 1000 BTU/FT3 0.60 Specific Gravity @ 0.5 in. WC Pressure Drop Propane Gas 2500 BTU/FT3 1.53 Specific Gravity @ 0.5 in. WC Pressure Drop Table E: Maximum Equivalent Pipe Length Plumbing from the heater back to the pool or spa must not have any valves or restriction that could prevent flow when the pump is operating. Heater must be located so that any water leaks will not damage the structure of adjacent area. PVC pipe may be glued directly into optional or field-supplied header unions. Flow Rates Polymer Headers Before attaching the optional 2-inch unions to the In/Out header, make sure the O-rings are properly seated in the grooves. Use AquaLube or equivalent non-petroleum-based lubricant on the O-ring. Hand tighten the unions. Glue PVC piping directly to the unions. Model No. Min. gpm Max gpm* 130A 20 70 *When flow rates exceed maximum 70 gpm, an external auxiliary bypass valve is required. See External Auxiliary Bypass Valve section     for details. Table F: Water Flow Rates In/Out Header O-Ring Tail Piece Nut 2" Pipe Drain Plug In/Out Header Hose Connector Hose Fig. 12: Optional In/Out Header for 2" Installation Fig. 13: In/Out Header for 1-1/2" or 1-1/4" Hose Connection

14 High-temperature CPVC header flanges and header flange nuts are available as an option. If there is any possibility of back-siphoning when the pump stops, it is recommended that a check valve (or valves) also be installed in the system. Internal Automatic Bypass Valve A built-in automatic bypass valve is provided in the In/Out header. The internal bypass valve automatically   responds to changes in water pressure in the piping system. The proper amount of water flow is maintained through the heater under varying pressures dictated by the conditions of the pump and filter. External Auxiliary Bypass Valve An auxiliary bypass valve must be used when flow rates exceed 70 gpm. Usually a high-performance pump size larger than one horsepower will exceed this flow rate. This valve is required to complement the function of the automatic bypass valve, particularly when starting the heater in winter or early spring when the spa or pool temperature is below 50°F. It also serves to eliminate needless pressure drop through the heater and accompanying reduction in the flow rate to the spa jets, etc. Bypass Disc Spring Bypass Body Fig. 14: Internal Automatic Bypass Valve From Heater T o Heater To Pool/Spa Bypass Valve From Pool/Spa Full Port Ball Valve or Globe Valve Fig. 15: Auxiliary Bypass Valve NOTE: Do not use a gate valve as an auxiliary bypass valve. Auxiliary Bypass Valve Adjustment To set bypass: With clean filter, adjustment is made by feeling the inlet and outlet pipes at the heater. Outlet pipes should be slightly warmer than inlet and comfortable     to the touch. If pipe is hot, close bypass; if cold, open bypass. Pressure Relief Valve Installation To conform to local building codes, it may be necessary     to install a pressure relief valve. A 3/4" pressure relief valve, having a capacity equal to the BTUH output    of the heater to be installed, is recommended for this heater. The maximum pressure relief valve setting is 125 psi. This relief valve needs to be installed on the outlet pipe from the header as noted in Fig. 16 below. Pipe onto Discharge Side of Piping Fig. 16: Pressure Relief Valve Installed

15 If required, this needs to be installed in a field-supplied fitting external to the heater. The valve shall be installed in a vertical position. Do not over-tighten. Install pressure relief valve hand tight plus 1/2 turn. Valve lever should be tripped at least once a year to ensure that waterways are clear. if relief valve does not function properly, replace it immediately. Heat Exchanger Pressure Drop Table Electrical Connections Be sure that electrical service to the heater has proper   overload fuse or circuit breaker protection, wire size and connections which comply with all applicable codes. Millivolt Heaters The Millivolt models are equipped with a self-generating    electrical system in which the electrical current is provided by a pilot generator. No external electrical connections are required. WARNING: To avoid water damage or scalding due to relief 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. Flow (gpm) Pressure Drop (ft of Head) 20 1.3 30 1.7 40 2.0 50 2.7 60 3.5 70 4.2 Table G: 130A Pressure Drop When installing a remote switch, do not exceed 10 ft of wiring from the heater. Use 18-gauge stranded wire. Electronic Heaters The Direct Spark Ignition Device automatically lights the main burners upon a call for heat. The heater is supplied with a dual voltage transformer for 120/240 VAC input power hookup. Heater must be electrically grounded and bonded in accordance with local codes, or, in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70. (Canada - Canadian Electrical Code, CSA C22.1, Part 1 and Part 2.) NOTE: If it is necessary to replace any of the original wiring, use 105°C wire or its equivalent, and/or 150°C wire or its equivalent, like the original wiring. See Figures 19 and 20 for wire ratings. NOTE: Electronic heaters come standard with a 120 VAC 3-prong power cord. For 240 VAC applications, see instructions below. Power source must be a wired ground, with ground fault circuit interruption circuitry. Fig. 17: Electronic Heater Power NOTE: Input power to the heater (120 VAC) can be supplied from the load (pump) side of time clock or directly from the GFCI power source. It is preferred to make connection to the load/pump side of the time clock. WARNING: Risk of electrical shock . More than one disconnect switch may be required to de- energize the equipment before servicing. CAUTION: Label all wires prior to disconnection when servicing controls. wiring errors can cause improper and dangerous operation.

16 Installation Instructions—240 Volt 1. Disconnect and remove 120 volt power cord. 2. Install wire nut on white transformer wire. 3. Wire nut 240 volt supply lines to the red and black wire on the transformer. 4. Wire nut green supply ground line to green transformer       wire CAUTION: This appliance has provisions to be connected to an alternate supply source. To reduce the risk of electric shock, disconnect all connections before servicing. 240V HOOK-UP HEATER L1 L2 RED RED BLACK HOT HOT BLACK GREEN GREEN WHITE SUPPLY SIDE Fig. 18: 240V Hook-Up Control Adjustments—Millivolt The pool or spa water temperature is controlled by the thermostat 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 turning    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 shown in Fig. 19 is adjustable by loosening the set screw, rotating the knobstop ring to the desired location, and retightening the set screw. HOT COOL Knobstop Ring Knobstop Set Screw Fig. 19: Water Temperature Thermostat NOTE: Maximum temperature is 104°F.

17 Wiring Diagrams HI Limit HI Limit (In/Out) (In/Out) Thermostat Manual Switch Switch Switch AGS Water Press Gas Valve Roll Out Valve Pilot Generator To Firemans Switch (field installed) Optional BK BK R Y/BK TH/PP W R + - PP TH V/BK V/BK O O Fig. 20: Wiring Diagram—Millivolt Models Fig. 21: Wiring Diagram—Electronic Models

18 FOR YOUR SAFETY READ BEFORE OPERATING A. This appliance is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand. B. BEFORE OPERATING, smell all around the appliance area for gas.  Be sure to smell near the  floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS: *Do not try to light any appliance. *Do not touch any electric switch; do not use any phone in your building. *Immediately call your gas supplier from a neighbor's phone.  Follow the gas supplier's instructions. *If you cannot reach your gas supplier, call the fire department. C. Use only your hand to push in or turn the gas control  knob.  Never use tools.  If the knob will not push in or turn by hand, do not try to repair it.  Call a qualified service technician.  Force or attempted repair may result in a fire or explosion. D. Do not use this appliance if any part has been under water.  Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water. 1. STOP! Read the safety information above. 2. Set the thermostat to the lowest setting. 3. Turn off all electrical power to the appliance. 4. This appliance is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand. 5. Remove heater door panel. 6. Turn gas control knob clockwise             to "Off". 7. Wait 5 minutes to clear out any gas.  If you then smell gas, STOP! Follow "B" in the safety information above. If you don't smell gas, go to the next step. 8. Turn gas control knob counter-clockwise to "On". 9. Replace heater door panel. 10. Turn on all electrical power to the appliance. 11. Set thermostat to desired setting. 12. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your service technician or gas supplier. OPERATING INSTRUCTIONS 1. Set the thermostat at the lowest setting. 2. Turn off all the electrical power to the appliance     if service is to be performed. 3. Remove heater door panel. 4. Turn gas control knob clockwise to "Off." 5. Replace heater door panel. SHUT-OFF PROCEDURES HONEYWELL VR 8205 GAS VALVE GAS INLET WARNING:  If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

19 A. This appliance has a pilot that must be lit by hand.  When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING, smell all around the appliance area for gas.  Be sure to smell near the  floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS: *Do not try to light any appliance. *Do not touch any electric switch; do not use any phone in your building. *Immediately call your gas supplier from a neighbor's phone.  Follow the gas supplier's instructions. *If you cannot reach your gas supplier, call the fire department. C. Use only your hand to push in or turn the gas control  knob.  Never use tools.  If the knob will not push in or turn by hand, do not try to repair it.  Call a qualified service technician.  Force or attempted repair may result in a fire or explo- sion. D. Do not use this appliance if any part has been under water.  Immediately call a qualified service    technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water. 1. STOP! Read the safety information above. 2. Set the thermostat on the lowest setting. 3. Turn On/Off switch to the "Off" position. 4. Remove heater door panel. 5. Push in gas control knob slightly and turn clockwise            to "Off". NOTE: Knob cannot be turned from "Pilot" to Off" unless knob is pushed in slightly.  Do not force. 6. Wait 5 minutes to clear out any gas. If you then smell gas, STOP! Follow  "B"  in the safety information above. If you don't smell gas, go to the next step. 7.     Locate pilot mounted on the right side panel of the burner tray. LIGHTING INSTRUCTIONS 8. Turn gas control knob counter-clockwise to "Pilot" 9. Place flame to end of pilot tube.  Push in control knob all the way and hold to light pilot. Continue to hold control knob in for about one minute after the pilot is lighted, release knob and it will pop back up.  Pilot should remain lighted. If it goes out, repeat steps 5 through 9. If knob does not pop up when released, stop and immediately call your service technician or gas supplier. 10. Stand to the side of the heater and turn the gas control knob counter-clockwise to  "On". 11. Replace heater door panel. 12. Turn On/Off switch to the "On" position. 13. Set thermostat to the desired setting. 1. Set the thermostat to the lowest setting. 2. Turn On/Off switch to the "Off" position. 3. Remove heater door panel. 4. Push the gas control knob slightly and turn clockwise             to "Off".  Do not force. 5. Replace heater door panel. SHUT-OFF PROCEDURE Gas Pressure Adjustment HONEYWELL MILLIVOLT GAS VALVE INVENSYS/ ROBERTSHAW MILLIVOLT GAS VALVE HONEYWELL PILOTROBERTSHAW PILOT FOR YOUR SAFETY READ BEFORE OPERATING WARNING:  If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

20 Post Start-Up Inspection Feel the inlet and outlet pipes. Outlet pipe should be only slightly warmer than the inlet. It should not be hot. With the heater on, remove the door and make a visual   check of the pilot and burner. The flame should be blue with a well-defined pattern. A yellow or "floating" flame indicates restricted air openings or incorrect orifice size. Should this occur, shut the heater off and contact the installer or gas sup- plier. WARNING: Should overheating occur or the gas supply fail to shut off, turn off the manual gas control to the appliance. 4" MAX Fig. 22: Correct Main Burner Flame Pattern Head of Pilot must be above Burner Deck. Fig. 23: Millivolt Pilot Burner Flame Igniter Minimum Spark Gap is 0.15" - 0.18" 3/8" Nominally from burner surface Fig. 24: DSI Igniter Location Cold Weather Operation Moderate Climate Heater operation can continue during short-term cold spells. When temperatures are between 0° and 32°F, flow (continuous pump operation) must be maintained. Cold Climate Prolonged operation with water temperatures below 50°F is not recommended. When starting the heater with water temperatures below 50°F, operate the heater continuously until higher temperatures are reached. Operating the heater for prolonged periods with pool water below 50°F can seriously damage the heater, and is not covered by the warranty. For cold climate areas, please follow the winterizing procedures listed in the next section. CAUTION: Do not use the heater to maintain water temperatures just above freezing or for freeze protection. When heater is used during freezing weather, care must be taken to avoid freeze-ups. Continuous pump operation is a must. Additional protection may be required. The heater is not warranted against freeze-ups.

21 Winterizing the Pool/Spa Heater Heaters installed outdoors in freezing climate areas may be shut down for the winter. Observe the following    procedure for winterizing the heater. 1. Turn off gas valve, manual gas valve, and electrical    supply to the heater. 2. Open drain plug located on the In/Out header, under the water pipes. 3. Open the union fittings on the In/Out water lines to break any vacuum in the system. Alternatively, remove the 2 wires from the water pressure switch and unscrew the water pressure switch to break any vacuum in the system. MAINTENANCE The following preventative maintenance is to be performed       one month after start-up and semi-annually thereafter. 1. Inspect top of heater and drafthood for soot, a sticky black substance around finned tubes and "V" baffles, and open flue gas passageways. Any visible soot should be cleaned for proper operation.      See the De-sooting Procedure in the Service Section. 2. Clean main burners and pilot burner of dust and lint. 3. Inspect and operate all controls, gas valve and pressure relief valve (if equipped). 4. Make visual check of the burner and pilot flames. Flame pattern on the main burner and pilot is illustrated       in the Post Start-Up Inspection section. In/Out Header Drain Plug Fig. 25: In/Out Header Drain Plug Location Yellow flame means restriction of the air openings. Lifting or blowing flame indicates high gas pressure.      Low flame means low gas pressure. Should these occur, shut the heater off and contact your gas supplier or qualified service agency. 5. On indoor heaters, clean room intake openings to ensure adequate flow of combustion and ventilation     air. 6. Keep area around heater clear and free from combustible         materials, gasoline and other flammable and corrosive vapors and liquids. SERVICE Water Pressure Switch The water pressure switch, ensures that the heater operates only when the filter pump is in operation. It is located on the In/Out header. It is factory set at 1.75 PSI for deck-level installations. When the heater is located below the level of the spa or pool, it may be necessary to adjust the pressure switch to compensate     for the no-flow static head. If it is necessary to adjust the water pressure switch, utilize the following procedure. Water Pressure Switch Adjustment 1. With pump and heater on, turn adjustment knob clockwise until a click is heard from the gas valve. CAUTION: Do not adjust the pressure switch until all air has been evacuated from the system and the water flow rate meets the requirements listed in Table F. Adjustment Knob Fig. 26: Water Pressure Switch Adjustment

22 2. Turn adjustment knob counter-clockwise 1/4 turn. 3. Turn pump off and on several times. Heater should shut off immediately. If it does not, repeat the above steps. Two-Speed Pumps In some cases, the flow on the low-speed is insufficient      to operate the heater. This is apparent when the water pressure switch cannot be further adjusted or if the heater makes banging noises or shuts off on high limit. In these cases, the pump must be run at high speed when heating the water. Flame Roll-Out Safety Switch Heaters are equipped with a thermal cutoff 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 disabled      by an over-temperature condition, caused by excessive restriction in the heat exchanger flue passage,      roll-out, high winds, etc. NOTE: If heater is installed outside of the limits shown, a higher pressure rated (11 psi) switch may be used. A flow switch, mounted and wired adjacent to the heater, may be used in place of the factory mounted pressure switch. See Illustrated Parts List for 11 psi water pressure switch. CAUTION: Do not operate the heater without the function of a properly adjusted water pressure switch or flow switch. Fig. 27: Flame Roll-Out Safety Switch High Limits The heater is equipped with two automatic high limits. Both are located in the In/Out header. Both are set to open at 135°F. High Limit Removal 1. Shut off main electrical power switch to heater. 2. Remove In/Out inspection panel. 3. Remove defective high limit and replace with a new high limit. 4. Replace inspection panel. Pilot Safety—Millivolt Models Heaters equipped with the standing pilot (Millivolt system)     have pilot generators which act as a safety device to shut off the flow of gas to the main burners and the pilot burner in case the pilot flame is extinguished.         The pilot burner must be manually re-lighted to place the heater in operation again. Refer to the lighting instructions provided on the heater label. Burner Tray Removal 1. Shut off main electrical power switch to heater. 2. Shut off gas upstream of heater. 3. Remove front door. NOTE: An erratic high limit is often characteristic of an internal heat exchanger problem, e.g. scale buildup,    defective bypass. Refer to Troubleshooting section. Fig. 28: High Limit Switch

23 4. Disconnect gas line from gas valve. 5. Remove (2) screws that mount burner tray to unit, and (2) screws that secure gas valve to jacket. 6. Disconnect wires that terminate at gas valve. 7. Disconnect hi-tension wire from igniter. 8. Remove (1) screw that mounts ground wire to burner tray. 9. Slide out burner tray. 10. Reverse above procedure to reinstall. Rear Hold Down Bracket Burner Millivolt Pilot Assembly (under Pilot Shield) Millivolt Gas Valve (Invensys shown) Manifold Pilot Lighter Tube Orifice Placement Bracket Pilot Bracket Burner Tray Panel Orifice Pilot Shield Rear Hold Down Bracket Burner DSI Gas Valve (Honeywell shown) Manifold Orifice Placement Bracket Burner Tray Panel Orifice Igniter Fig. 29: Millivolt Burner Tray Assembly Fig. 30: DSI Burner Tray Assembly

24 Gas Valve Removal 1. Remove burner tray from heater as described in the Burner Tray Removal section. 2. Disconnect pilot tubing (if removing a Millivolt valve). 3. Disconnect wires to gas valve. 4. Unscrew gas valve from manifold. 5. Reverse above procedure to reinstall. Main Burner & Orifice Removal 1. Remove burner tray. 2. Remove screws from rear 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. 5. 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. ORIFICES MUST BE PARALLEL WITH BASE TOLERANCE OF +2° -0° IGNITER BETWEEN IGNTER & BURNER PORTS 0.375" ± 0.125" BURNER PORTS Fig. 31: Igniter Position to Burners Igniter Removal & Cleaning (Electronic) 1. Disconnect high tension wire from igniter. 2. Remove (2) screws that mount the igniter to the burner tray. 3. Remove igniter from burner tray. 4. Reverse above procedure to reinstall. Ignition Control Fault Codes The ignition control fault codes listed in Table H can be used to troubleshoot ignition problems. Fig. 32: Direct Spark Igniter Code Condition Steady OnPower applied, control OK Steady OffNo power or control hardware fault 1 FlashIgnition lockout from too many trials 2 Flashes Ignition lockout from too many flame losses in single call for heat 3 Flashes Control hardware/software fault detected Table H: Ignition Control Fault Codes

25 Pilot Removal & Cleaning (Millivolt) 1. Disconnect pilot tubing and wires from gas valve. 2. Remove pilot assembly from burner tray. 3. Remove pilot from bracket. 4. Remove pilot orifice and air opening (Honeywell MV unit only), and clean with wire or small brush. 5. Reverse above procedure to reinstall. Heat Exchanger Removal 1. Shut water, gas and electricity off, close valves and relieve pressure, then remove relief valve. Remove side inspection panels. 2. Remove top jacket holding screws. Remove the jacket top. 3. Remove the four (4) screws holding down the flue collector. Remove the flue collector. 4. Remove upper in/out access panel. Pilot Thermopile Air Opening Orifice Fig. 33: Honeywell Millivolt Pilot 5. Disconnect all electrical wiring from in/out header. 6. Remove temperature sensor from in/out header. 7. Disconnect flange nuts on In/Out header. 8. Set aside heat exchanger side baffles. 9. Lift heat exchanger straight up using caution not to damage refractory. 10. Reverse above procedure to reinstall. Tube Cleaning Procedure Establish a regular inspection schedule, the frequency depending on the local water conditions and the severity    of service. Do not let the tubes clog up solidly. Clean out deposits over 1/16" in thickness. After reaming, mount the wire brush in place of the auger and clean out debris remaining in the tubes. Another method is to remove the heat exchanger, ream tubes and immerse heat exchanger in non-inhibited     de-scale solvent for severe scale build-up. De-sooting Procedure Soot will clog areas between fins and cause eventual tube failure. Any sign of soot at the base of the burners    or around the outer jacket indicates a need for cleaning. 1. Remove top and flue collector from cabinet. 2. Remove "V" baffles from heat exchanger, including    side baffles. 3. Remove burner tray. CAUTION: Do not enlarge hole in pilot orifice. Extension Pieces (2) Auger with Carbide Tip Wire Brush Fig. 34: Tube Cleaning Kit NOTE: Please remove heat exchanger from heater prior to reaming or removing debris. CAUTION: Soot may be combustible. Wet sooted surfaces completely prior to cleaning. Do not use steel wire brush.

26 4. Remove heat exchanger from the heater and wash with a garden hose, making sure soot is removed from spaces between fins. 5. Reverse above procedure to reinstall. Immersion Well Replacement— Millivolt 1. Shut off water to heater and drain heat exchanger. 2. Remove access panel on water connection side. 3. Remove old immersion well with bushing and sleeve. 4. Install replacement well in header. NOTE: In extreme cases it may be necessary to do high-pressure cleaning at a local car wash. DO NOT WIRE BRUSH . Fig. 35: Immersion Well Assembly Replacement Parts Any part returned for replacement under standard company warranties must be properly tagged with a return parts tag, completely filled in with the heater serial number, model number, etc., and shipped to the Company freight prepaid. If determined defective by the Company and within warranty, a like part or equal substitution will be returned, freight collect. Credit will not be issued. MANUFACTURER: 2151 EASTMAN AVENUE OXNARD, CA 93030 NOTE: Installation in polymer header should be hand tight plus 1/2 turn. NOTE: When ordering parts, it is important that the heater model number, serial number, and type of gas are specified.

27 TROUBLESHOOTING Mechanical PROBLEM CAUSE SOLUTION Harmonics, or whining noise *Debris or restriction in system............ Locate the restriction and remove. Flush system and clean. Low flow............................................... Scale forming in heat exchanger - clean heat exchanger and check pool pH and total alkalinity. Outlet pipes hot to touch Low flow.............................................. Scale forming in heat exchanger - clean heat exchanger and check pool pH and total alkalinity. Heater going on and off Dirty filter.............................................. Clean or replace filter. continuously Low water level in pool........................ Raise water level. External bypass setting out of adjustment............................................ Adjust bypass. *Pressure switch out of adjustment..... Adjust pressure switch. Liming or scale forming in Pool water............................................ See Water Chemistry section. exchanger Bypassing too much water................... Inspect bypass for movement, if no movement, replace. Sooting High flow rates..................................... Reduce by adding manual bypass valve. Adjust manual bypass valve until heater outlet water temperature is between 105°F and 110°F. (Refer to Figure 15.) *Air starvation....................................... Refer to installation instructions. *Improper venting................................ Follow recommended installation instructions. *Insects or debris clogging burner intake ports............................. Clean burners. Pilot outage Low gas pressure................................ Adjust gas pressure. Restricted pilot..................................... Clean pilot. Weak pilot generator............................ Replace pilot. Yellow lazy flame Low gas pressure................................ Adjust gas pressure. *Insects or debris clogging burner intake ports............................... Clean burners. Outer jacket very hot *Broken refractory caused by (paint blistered) shipping damage or improper combustion......................................... Replace refractory panels. Excessive sooting of heat exchanger.. Determine cause of sooting & correct. Takes too long to heat Under-sized heater............................... Calculate heating capacity of heater: pool or spa Htr. output(BTUH) Pool gallonage x 8.33 This does not take into account heat loss due  to weather. Filter not running long enough............. Reset time clock. Dirty filter.............................................. Clean filter. Gas line or meter undersized............... Refer to installation instructions. *Debris in gas line................................ Remove debris or blow out gas line. Leaking at well Overacid............................................... Replace well and maintain proper water chemistry. Over chlorination.................................... Check location of chlorinator and backflow preventer. Leaking at heat exchanger Overacid............................................... Replace heat exchanger and maintain proper water chemistry. Over chlorination.................................... Check location of chlorinator and backflow preventer. Gasket brittle and leaking - Heater running after pump shuts off.... See Pressure Switch Adjustment. (overheated) Refractory damage.............................. Replace refractory. Sooted heater....................................... Determine cause of sooting and correct. * Indicates symptom which usually occurs on initial start-up. These instructions are intended for use by qualified personnel who are specifically trained and experienced in the installation of this type of heating equipment and related system components. Installation and service personnel       may be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to these instructions.

28 Electrical Standing Pilot Millivolt The following information is presented for use by qualified service personnel only. 1. Filter must be on with adequate water flow through heater. 2. Gas valve must be in "ON" position. Thermostat set higher than pool water temperature. 3. Jumpers are for temporary check only. If left in place, they could cause the heater to burn up. If pilot burner remains lit 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 prevented from firing Jump across both "TH" wires on gas valves Check gas supply, gas line size, gas pressure. Also check for insects or debris in pilot assy. If pilot burner does not light Light pilot 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 500mV, check gas pressure. Also check for insects or debris in the pilot assembly If main burner fires, remove jumper Replace gas valve If main burner does not fire, remove jumper Remove both "TH" wires from gas valve. Relight pilot If pilot burner stays on Problem is a wire or component short to cabinet or low gas pressure If above 500mV, replace gas valve Clean filter If main burner fires, remove jumper If output is still low, replace pilot generator

29 Terminal Block Wiring Fig. 36: Terminal Block Wiring 1. Raw Output (700mV± 100) Pilot generator disconnected from valve (knob must be held down to keep pilot on). White - Negative Red + Positive 2. Pilot Load (500mV± 100) Pilot generator connected to valve-Power applied to pilot solenoid. TP(Thermopile-Robertshaw) PP(Power Pile-Honeywell) TH TP - Common (Invensys) TH PP - Common (Honeywell) 3. Main Valve Load (200mV± 100) Control/Limit circuit closed (All switches "ON") TP(Thermopile-Robertshaw) PP(Power Pile-Honeywell) TH TP - Common (Invensys) TH PP - Common (Honeywell)

30 Electronic Control Logic Flowchart Turn knob to a desired temperature zone. Yes Yes Yes No No No Turn switch ON. After (6) seconds, does the igniter spark? Does the burner tray light? Does the burner tray stay lit? START END Check water flow.  Pressure switch is set for 1.75 PSI. Turn knob counterclockwise (setpoint may be lower than actual temperature) Check High Limit.  Both are normally closed. Check Roll-Out switch.  Must be normally closed. Check wiring in control box against wiring diagram. Ensure the heater is OFF.  Attempt each step individually and manually restart the heater after each attempt. Check gas line.  There may be some air in the system. Make sure high tension wire is not grounding out to metal or other voltage wire. Make sure high tension wire is properly connected to the igniter. Check the gas valve.  There must be 24VAC while the ignition module is sparking. Check the igniter.  Igniter may not be sensing correctly. Check that the spark plug gap is ~.18". Fig. 37: Control Logic Flowchart General—Heater Will Not Fire If there is no electrical power, it may be that the home "circuit breaker" has tripped. Try re-setting it. If there is electrical power but the heater will not fire check the following: 1. The time clock must be in the "ON" position. 2. The pump strainer basket may be full. If so remove debris. 3. The filter may be dirty. If so, backwash or clean filter. (To tell if the filter is dirty, look to see if the filter pressure     will be higher than usual). 4. The pump may have lost its prime and be running dry. Check the pressure on the filter. If there is no pressure;      then there is not enough moving water (or the gauge is broken). Try to get the pump to run at its normal flow rate.

31 ILLUSTRATED PARTS LIST

32 5-P 1-P 3-P 4-P 2-P 6-P HONEYWELL MILLIVOLT PILOT 7-P 8-P

33 CALL Plastic Plastic OUT DESCRIPTION Green Gray B BURNER TRAY 1-B Burner Tray w/Burners (Sea Level)* 011 578F 011 578F Burner Tray  w/o Burners (Sea Level)* 011 579F 011 579F Burner Tray w/Gas Valve Natural MV 011 580F 011 580F Burner Tray w/Gas Valve Propane MV 011 581F 011 581F Burner Tray w/Gas Valve Natural DSI 011 582F 011 582F Burner Tray w/Gas Valve Propane DSI 011 583F 011 583F    2-B Burner Hold Down Kit 011 584F 011 584F    3-B Burner 301210/10 301210/10    4-B Burner Orifice Nat. #51  (Sea Level)* 350080F/10 350080F/10 Burner Orifice Pro. #59 (Sea Level)* 350350F/10 350350F/10 C CONTROLS 1-C Thermostat Auto Reset 135º Surface Mount 006725F 006725F 2-C Thermostat Control MV (Mechanical) 003346F 003346F 3-C Thermostat Control DSI (Solid State) 011 585F 011 585F     4-C PC Board 005086B 005086B     5-C Potentiometer 011 586F 011 586F     6-C Temperature  Sensor 011 587F 011 587F G GAS VALVE 1-G Combination Valve Nat. MV 011 588F 011 588F Combination Valve Pro. MV 011 589F 011 589F Combination Valve Nat. DSI 011 590F 011 590F Combination Valve Pro. DSI 011 591F 011 591F H HEAT EXCHANGER 1-H Heat Exchange Assy Copper 011 592F 011 592F Heat Exchange Assy Cupro Nickel 011 593F 011 593F    2-H Inlet/Outlet Header Complete 011 594F 011 594F Inlet/Outlet Header (Includes 6-H) 011 595F 011 595F    3-H Return Header (Includes 6-H) 011 596F 011 596F    4-H Tube Bundle Copper ** 011 597F 011 597F Tube Bundle Cupro Nickel ** 011 598F 011 598F        5-H Baffle 011 599F 011 599F        6-H Flange Nut Kit 008259F 008259F        7-H O Ring Gasket (2) 011 600F 011 600F    8-H Sensor Adapter DSI 006714F 006714F Sensor Well Millivolt 006805F 006805F    9-H Bypass Kit 011 601F 011 601F        10-H Bypass Valve 006716F 006716F        11- HBypass Dam / Shaft 006717F 006717F        12-H Bypass Spring 011 602F 011 602F    13-H Drain Plug 006721F 006721F    14-H Inlet/Outlet Header Dam 011 603F 011 603F 15-H Hose Adapter 1-1/2" MPT x 1-1/2" Hose 011635 011635 16-H 2" PVC Connector & Nut (2) Optional 006723F 006723F    17-H O Ring (2) Optional 006724F 006724F J CONTROL BOX 1-J Control Box DSI  (Includes 3-C) 011 604F 011 604F    2-J Transformer 120/240/24V 011 605F 011 605F 3-J Ignition Control Direct Spark 011 606F 011 606F 4-J Rocker Switch 009493F 009493F *FOR ALTITUDES ABOVE 2,000 FEET ABOVE SEA LEVEL, CONSULT THE FACTORY. ** WARNING : The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also damaged the bypass valve.  We recommend you inspect the bypass assembly.  Failure to do so could cause premature failure of this replacement part.

34 CALL Plastic Plastic OUT DESCRIPTION Green Gray M MISCELLANEOUS COMPONENTS 1-M Pressure Switch 1.75 PSI 006737F 006737F Pressure Switch 11 PSI Special-See Adj in Service Manual 009133F 009133F 2-M Thermostat Knob 009499F 009499F 3-M Knob Stop 006886F 006886F 4-M Dial Plate 901768 901769 5-M PRV 125 PSI (Optional) 008091F 008091F 6-M Deliming Kit 052871F 052871F 7-M Wire Harness MV 011 607F 011 607F Wire Harness DSI 011 608F 011 608F 8-M Line Cord 011 609F 011 609F 9-M Thermal Fuse 005899F 005899F 10-M Touch-up Paint (Green) 750125 Touch-up Paint (Dark Gray) 750126 P PILOT 1-P Pilot Nat. MV 600525B 600525B Pilot Pro.  MV 600575B 600575B    2-P Pilot Orifice Nat. MV 003901F 003901F Pilot Orifice Pro. MV 003902F 003902F    3-P Pilot Generator MV 600019B 600019B 4-P Pilot Mounting Bracket MV 011 610F 011 610F 5-P Lighter Tube MV 052797 052797 6-P Pilot Tube MV 004078F 004078F 7-P Ignitor DSI 011611 F 011611 F 8-P Hi Tension Wire DSI 011 612F 011 612F R REFRACTORY 1-R Refractory Kit 011 613F 011 613F 2-R Refractory Retainer Kit 011 614F 011 614F S SHEETMET AL 1-S Jacket Top 011 615F 011 616F 2-S Jacket Left 011 617F 011 618F 3-S Jacket Right 011 619F 011 620F 4-S Jacket Rear 011 621F 011 622F 5-S Flue Collector 011 623F 011 623F 6-S Door Assy. 011 624F 011 625F 7-S Access Panels 011 626F 011 627F 8-S Control Panel 011 628F 011 629F 9-S Poolstat Control Cover 006492 006492 V VENTING 1-V Stackless Top (Outdoor) 011 630F 011 631F   2-V "Pagoda" Top 010334 011632 3-V Drafthood (Indoor) 003723 003723 4-V Outdoor Stack w/Adapter (Outdoor) 004301 011558   5-V Outdoor Stack N/A N/A                       CONVERSION KITS** GAS CONVERSIONS Natural to Propane MV 011 633F Propane to Natural MV 011 634F Natural to Propane DSI N/A Propane to Natural DSI N/A ** Gas conversions are to be done only by a qualified agency.    For gas conversions, please consult the factory. (not shown) (not shown) (not shown)

35