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Waterpik Technologies pool/spa heater User's Manual

Contents

1. 1 2A 1 Special Precautions 1 2B Heater Assembly and Preparation 1 2C Heater Location 2 2C 1 Installation Information 2 2C 2 Installation Clearances 2 2C 3 Flooring Typical Installation 2 2D Outdoor Installation 3 2E Outdoor Shelter Installation Canada 3 2F Indoor Installation enserre 3 2F 1 Preparation of Heater For Indoor Installation neern 3 2F 2 Special Location Requirement 4 2F 3 Air For Combustion and Ventilation 4 2F 4 Exhaust Venting nnise 4 2F 4a Important Information On Vent Pipe Sizing 4 2F 4b Vent Pipe Sizing and Installation 5 2G Gas Supply and Piping 5 2G 1 General Instructions 5 2G 2 Special Precautions For Propane Gas 8 2H Electrical POWT oss sivine hence enim genie eterna ates 8 2H 1 General Information 8 2H 2 Bonding reaa en RL waa 8 2H 3 Auxiliary Time Clock Wiring 8 2H 4 Remote Operation 00 cccecee
2. H0214000B a A Water Pik Technologies Company 6000 Condor Drive Moorpark CA USA 93021 707 776 8200 Fax 707 763 7785 480 S Service Road West Oakville Ontario Canada L6K 2H4 905 844 8233 Fax 905 844 2635 Litho in USA Water Pik Technologies 0401
3. 400 100 645 200 1290 2F 4 Exhaust Venting 2F 4a Important Information on Vent Pipe Sizing When converted to indoor venting configuration the LX and LT heaters have a vent collar fitting The diameter of the vent collar and thus the minimum diameter of the vent pipe to be used is determined by the model of heater installed The only correct procedure for vent pipe sizing is to do so in accordance with table 3 and the applicable installation code as stated in the Danger warning below Table 3 Vent Pipe Sizing Table LY Vent Pipe Diameter Model mo so ss DANGER Vent pipe diameter must be as reguired by the National Fuel Gas Code Z223 1 or the Canadian Installation Codes for Gas Appliances CAN 1 B149 1 amp 2 Undersize pipe can result in inadequate venting and oversize pipe can result in vent condensation In either case the result can be release of combustion products to the indoors This can cause serious injury or death by carbon monoxide poisoning or asphyxiation LX and LT Pool Heaters Page 5 VENT TERMINATED AT ah LEAST 2 610 mm LISTED VENT CAP ABOVE ANY OBJECT WITHIN 10 3 05 m 2ft 0 6 m STORM COLLAR DUCTED OPENINGS ROOF JACK 1 4 in 6 35 mm MINIMUM PITCH PER FOOT OF HORIZONTAL PIPE OUTLET AIR DUCT ADEQUATE ADEQUATE AIR SUPPLY FOR GARAGE AIR SUPPLY TO ROOM TOP INSTALLATION TO ROOM TOP AND BOTTOM BASE O
4. A m NM a M E ISNA daj ddd di MLA ANNOYS WA Hi Q1 iNo ti L 9 N N uta OUNOD NOUINS sy za a ti Ni ya Hite HOLIMS RINSS Rd UIMOTA NJA ajya aya M d VEMO a M ya Hoorn EN MAMOTA HOLIMS UIMOTA N LIWA AGEL ya HOLIMS JAN 40SL ya NIT HOLMS UNIT HOIH mgisn4 LISHA TVNNYA M M Figure 8 LLD Connection Schematic Wiring Diagram Page 8 Laars 12 Before operating the heater test the complete gas supply system and all connections for leaks using a soap solution Do not use an open flame AXCAUTION Some leak test solutions including soap and water may cause corrosion or stress cracking Rinse the piping with water after testing 2G 2 Special Precautions for Propane Gas Liquefied petroleum LP gas is heavier than air Therefore do not install pool heaters using LP gas in pits or locations where gas might collect Locate heaters a safe distance from LP gas storage and filling equipment Consult local codes and fire protection authorities about specific installation restrictions 2H Electrical Power 2H 1 General Information Wiring connections must be made exactly as shown in the wiring diagram found on the inside of the heater see Figure 8 Grounding must be provided as required by the prevailing electrical code A separate bonding wire MUST be provided as indicated in the following section The heater comes factory wired intended for use with 240 Volt 60 Hz AC field electr
5. Coat the threads of the pressure relief valve PRV with an appropriate metal to metal thread sealant 11 Install the adapter on the PRV and tighten using two wrenches Use the mark made earlier on the adapter to orient the PRV to the desired direction in relation to the water connections on the header 12 Wrap the threads of the adapter with a suitable teflon thread tape LX and LT Pool Heaters Page 15 13 Reinstall the adapter with the PRV into the plastic threaded hole and tighten it until the mark on the adapter is once again facing the same direction as the water connections on the header CAUTION Do not use any pipe compound or pipe dope on the threads of the adapter or any part that comes in contact with the plastic headers These compounds may damage the header over a period of time DO NOT TIGHTEN WITH A WRENCH Overtightening may crack the header Route the discharge piping so that steam from the pipe does not endanger anyone near the heater Refer to your local installation codes for more detailed information The valve setting should be at or below the maximum working pressure of any component in the filter system The working pressure of the LX heater is 75 psig 21 5 Automatic Chlorinators Chemical Feeders A high concentration of chlorine and many similar chemicals in the pool heater can be very destructive Heater damage caused by chemical concentration is not covered by the Waterpik
6. electrical source 2 Connect the wires from the source to the leads on the right side of the heater in the space behind the raceway see Figure 9 NOTE No external junction box is required 2H 2 Bonding The National Electrical Code and most other codes require that all metallic components of a pool structure including reinforcing steel metal fittings and above ground equipment be bonded together with a solid copper conductor not smaller than a number 8 wire The heater along with pumps and other such equipment must be connected to this bonding grid A special labeled bonding lug is provided on the right side of the heater to accommodate this requirement 2H 3 Auxiliary Time Clock Wiring If you install a time clock to control the filter pump operation it is recommended that the time clock have its own low voltage Fireman s switch to turn off the heater before turning off the pump The switch should shut off the heater about 15 minutes before the filter pump shuts off This will allow for a more efficient operation by removing any residual heat contained in the heat exchanger back to the pool To install a time clock auxiliary switch into the heater circuit follow these instructions see Figure 10 l Remove heater door LX and LT Pool Heaters Page 9 2 Remove the factory installed jumper wire and tag from the terminal strip see Figure 10 3 Connect the low voltage wires from the time clock auxiliary swi
7. or hot tub use can cause drowsiness which could lead to unconsciousness and subsequently result in drowning 3 Pregnant women beware Soaking in water above 102 F 39 C can cause fetal damage during the 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 4F 2C 5 Persons with medical history of heart disease circulatory problems diabetes or blood pressure problems should obtain their physician s advice before using a spa or hot tub 6 Persons taking medications which induce drowsiness such as tranquilizers antihistamines or anticoagulants should not use spas or hot tubs Prolonged immersion in hot water can induce hyperthermia Hyperthermia occurs when the internal body temperature reaches a level several degrees above the normal body temperature of 98 6 F 37 C Symptoms include dizziness fainting drowsiness lethargy and an increase in the internal body temperature The effects of hyperthermia include e Unawareness of impending hazard e Failure to perceive heat e Failure to recognize need to leave spa e Physical inability to leave spa e Fetal damage in pregnant women e Unconsciousness resulting in a danger o
8. to adjust Figure 19 Adjustment of Pressure Switch To adjust the pressure switch proceed as follows see Figure 19 The pool filter must be clean before making this adjustment The heater does not have to be firing 1 Set the heater control to the OFF position 2 Start the filter pump and confirm by means of an voltmeter that the pressure switch closes if the switch fails to close replace it with a switch which has a lower minimum setting 3 Set the heater control to either Pool or Spa Heater should start 4 Pry out the top rubber dirt plug on the pressure switch 5 Use a 7 32 inch Allen wrench to turn the adjustment screw very slowly clockwise until the heater goes off 6 Slowly turn the pressure switch adjustment screw counterclockwise one quarter turn The heater should come back on 7 Check the adjustment by turning the filter pump OFF The heater fan will continue to run but the burners should shut off immediately If they do not restart the filter pump and repeat Steps 6 and 7 Check the adjustment again 8 Return the pool temperature control to the desired temperature It may be necessary to repeat these steps to get a proper setting The switch must be set so that the heater will not fire unless the pump is running If a proper setting cannot be reached contact the factory service department 2J 5 Water Temperature Rise The Laars LX and LT pool heaters have an internal by
9. which automatically lights the heater Do NOT try to light the burners by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS e Do not try to light any appliance e Do not touch any electric switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e Ifyou 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 don t try to repair it call a gualified 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 gualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water OPERATING INSTRUCTIONS 1 STOP Read the safety information above on this label 2 Set the thermostat to lowest setting and turn appliance switch to OFF 3 Turn off all electric power to the appliance 4 This appliance is eguipped with an ignition device which automatically lights the heater Do not try to light the burners by hand 5 Remove the heater door 6 Turn gas control knob clockwise
10. 125 GPM 7 9 l s An external bypass will need to be installed or if one already exists open the external bypass valve gradually until the temperature range in Table 8 is achieved 8 Ifit was necessary to adjust the external bypass as outlined in step 6 scribe a line on the bypass shaft and case to mark the correct adjustment position Wire or remove the valve handle to prevent tampering Note that temperature rise is somewhat less when a heater is derated for installation at elevations significantly above sea level For high elevation installations reduce the numbers in Table 8 by 3 per 1000 feet above sea level Table 8 Water Temperature Rise and Flow Rates Measured at Input Output Header Minimum Maximum Minimum System Model Temp Rise Temp Rise Flow F C F C GPM l s 250 24 13 28 16 30 1 9 400 36 20 40 22 30 1 9 In a system without external bypass it may be necessary to make changes If temperature rise is too low a manual bypass must be installed If temperature rise is too high there is inadeguate flow possibly reguiring a change to the piping system or a larger pump Before proceeding with either remedy verify proper heater operation Low gas input results in low temperature rise and vice versa A problem with the heater internal bypass assembly also affects measured temperature rise SECTION 3 Operating Instructions Lighting and shutdown instructions are posted ins
11. N TI COUPLING Figure 16 Piping to Heater Note Only the small tab of the top groove will fit behind the upper panel 40 Remove the button plug type washer from the left side cover panel This panel will not be used in reassembling the heater after a heat exchanger reversal However the button plug washer will be needed Do not replace the cover panel over the vent switch outlet Doing so may cause the heater to malfunction 41 The gas line may enter the heater from either the left side or the right side Replace the button plug washer in the hole through which the gas line will enter the heater 42 Use the button plug to cover the hole on the opposite side of the heater Note Be sure that the white fiber gasket is positioned on the top flange of the exhaust vent 43 Replace the top While positioning the top pull the control panel through the hole and place it on top of the panel Fasten the top to the heater by replacing the two hex head screws at the upper corners of the raceway and the two philips head screws at the upper corners of the rear panel 44 Position the vent grill over the exhaust vent Replace the four philips head screws that fasten the vent grill to the top 45 Reinstall the control panel assembly into the top panel Slide the back of the bezel into place then lower the front aligning the holes in the bezel with the holes in clips on the tabs on the top panel Replace the two philips h
12. Reconnect the two white wires to the vent switch now located just above the return header Reconnect the blower pressure switch tubing to the blower housing Replace the EMI shield metal plate located over the blower by reinstalling the two hex head screws Slide the upper right side panel back into the corner posts on the right side of the heater Push it down until the tabs on the panel lock into the top of the corner posts Install the flat return header side cover plate removed from the left side of the heater on the right side to cover the return header by replacing the four philips head screws one in each corner Slide the upper left side panel back into the corner posts on the left side of the heater Push it down until the tabs on the panel lock into the top of the corner posts Remove the button plug from the inlet outlet side cover plate 39 Reinstall the inlet outlet header side cover plate c Red Blower wire to terminal 9 located under the inlet outlet header It is held with four philips head screws one in each corner 3 WAY JANDY CHANGEOVER a VALVE e SKIMMER 3 WAY JANDY CHANGEOVER VALVE MAIN POOL p RETURN BALANCING VALVES FROM SKIMMER AND DRAIN HEATER MANUAL BY PASS MANUAL BY PASS DETAIL MANUAL BY PASS IS USED WHEN FILTRATION RATE EXCEEDS 125 GALLONS PER MINUTE Figure 15 Typical Water Piping LX and LT Pool Heaters Page 13 COUPLING NUT
13. Sw 2 Temp eae the desired temperature thermostat setting in either ensor RS SERVICE k i Termostat yatar ON LINE FOR Fahrenheit or Celsius When there is water flowing Pool Spa ro E through the heater the filter pump is on the water Se ry temperature is displayed in the right most of two bar 60 D graphs in the center of the screen This bar graph is SELECT V ee labeled as Water Temperature The selected thermostatic THERMOSTAT SETTINGS setting either Pool or Spa is displayed as a bar graph s directly to the left of the water temperature bar graph This SERVICE DIAGNOSTICS SEE INSIDE FRONT DOOR bar graph is labeled as Thermostat Setting Note that when neither thermostat is selected the heater is in off mode only the water temperature is displayed If there is no water flowing through the heater the filter pump is off then only the thermostat setting for the mode selected will be displayed a The LX Control Panel Display The Model LT heater does not display water temperatures or thermostatic settings pon n When the heater is unable to operate due to a gt PRESSURE PSA jS problem the temperature control will identify which limit ES 20 is not satisfied The Model LX displays this information H LMT 465 on the left side of the LCD under the LAARS LX logo SHAFII seno When the gas heater is firing the LCD displays Heat
14. Technologies Warranty See Table 6 for guidelines on pool water chemistry IMPORTANT If an automatic chlorinator is being used eguip the chlorinator with an anti siphoning device so that chlorine will not siphon into the heater after the pump shuts off Wire an electric chlorinator so that it cannot operate unless the filter pump is running If the chlorinator has an independent clock control synchronize it with the filter clock Always install a chlorinator so that it introduces the chlorine downstream from the heater and if possible below the level of the heater outlet fitting Table 6 Chemical Concentration Levels Test Recommended Level Free Chlorine or 1 0 to 3 0 ppm Total Bromine 2 0 to 4 0 ppm pH 7 2t0 7 6 Total Alkalinity TA 100 to 150 ppm Calcium Hardness CH 200 to 400 ppm Langelier Saturation Index SI 0 5to 0 5 Cyanuric Acid 30 to 150 ppm Total Dissolved Solids TDS Less than 1500 ppm Copper 0 ppm As recommended by IPSA 2J Start up and Adjustment 2J 1 Normal Operation The LX and LT heaters are capable of automatic operation based on a call for heat at preset temperatures and an operator selection between pool or spa settings Additionally the heater may be controlled by a remote unit to anticipate bather load changes in temperature settings or a variety of other demands that might be encountered The heater has an internal safe
15. accordance with local codes and the most recent edition of the Installation Codes for Gas Burning Appliances CAN 1 B149 1 amp 2 The Canadian Gas Codes are available from Canadian Gas Association 55 Scarsdale Road Don Mills Ontario M3B 2R3 2A 1 Special Precautions Liquefied petroleum LP gas is heavier than air Therefore a pool heater using LP gas is subject to special installation rules Consult local codes and fire protection authorities about specific installation restrictions Fuel gas and its combustion products are known to cause cancer or harm the reproductive process Follow these installation instructions and applicable codes exactly to avoid this hazard 2B Heater Assembly and Preparation The LX or LT can be installed in a variety of ways some of them requiring preparation or assembly in the field Water connections are provided on the right side of the heater but can be changed to the left side by reversal of the heat exchanger Page 2 Laars It is best to handle these preparations before the heater is installed in its final location Instructions are provided in subsequent sections of this document Contact Waterpik Technologies regarding installations at elevations above 3 000 feet 980 m It is necessary to make changes to the burner tray to assure proper operation 2C Heater Location 2C 1 Installation Information The LX and LT can be installed outdoors or indoors as outlined in later sec
16. collecting of flammable materials leaves paper etc around or beneath the heater 2 Keep the pool heater area clean and free of all combustible materials gasoline and other liquids and vapors Page 26 Laars ww Do not use the heater if any part has been under water Immediately call a qualified professional technician to inspect the heater and replace any part of the control system and any gas control which has been under water Check for spider webs and other debris in the heater and vent outlet especially at spring start up 3H 2 Professional Inspection Inspections performed at least once a year by a qualified professional technician are required to keep the heater operating safely and efficiently through the years The following basic safety checks must be performed l 2 3 a Inspect the burners and verify that they are clean Inspect the fan for damage Make sure that the pressure switch operates properly by shutting the filter pump off and on a few times The burner should go off immediately after the pump stops An ignition seguence should start shortly after the pump is turned back on Make a visual check of the main burner flame The flame can be seen in a mirror arrangement held beneath the burners The flame should be light blue with little or no yellow tips in the flame Inspect the gas and electronic controls including the following a High temperature limit switch b Water pr
17. f to OFF 7 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information above on this label If you don t smell gas go to next step 8 Turn gas control knob counterclockwise K to ON 9 Replace control access panel 10 Turn on all electric power to appliance 11 Set thermostat to desired setting and switch appliance from OFF to either POOL or SPA 12 If the appliance will not operate check that the filter pump is on the filter is clean and water is flowing to the pool Otherwise follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier TO BURNERS GAS CONTROL IN OFF POSITION TO TURN OFF GAS TO APPLIANCE 1 Set the thermostat to lowest setting and switch appliance to OFF 2 Turn off all electric power to the appliance if service is to be performed 3 Turn gas control knob clockwise P to OFF 4 Replace control access panel Page 24 Laars 3D 2a Spa Water Chemistry Maintaining safe water conditions in a spa can only be done by regular water changes and the proper addition of sanitizing chemicals Kits are available from your local pool supply dealer for making the various tests for mineral content One of these kits will detect copper in the system This is usually a warning that corrosion is taking place possibly due t
18. wires that attach to the high limit switches along the copper siphon loop back to the right side of the heater Reconnect the wires to the wire harness Page 12 Laars 26 Route the wires that attach to the temperature sensor along the copper siphon loop back to the right side of the heater Reconnect the wires to the tabs on the back of the control panel marked as J4 1 and J4 2 31 27 Use plastic wire ties to refasten the temperature sensor and high limit switch wires to the copper 32 siphon loop Bundle the wires near the control panel and fasten them with a wire tie 33 A 28 Replace the flue collector so that the blower mount is in the same position as it was before the heat exchanger reversal Be sure that the bottom of the flue collector lies flat on the top of the combustion chamber and that it covers all of the heat exchanger tubes Replace the hex head screws to fasten the flue collector to the combustion chamber 36 29 Reassemble the blower and exhaust vent to the flue collector Be sure that the blower is seated properly on the gasket and fasten it to the flue collector with four hex head screws 37 30 Reconnect the fan wires to the terminal strip as follows Terminal numbers are shown on wires connected to the bottom of the terminal strip 38 a Black Blower wire to terminal 11 b Blue Blower wire to terminal 10 34 d Yellow Blower wire to terminal 8 e White Blower wire to terminal 7
19. 0 1 1 4 1 1 2 1 1 2 Notes 1 These numbers are for natural gas 0 65 Sp Gr and are based on 1 2 inch 3 45 kPa water column pressure drop Check supply pressure with a manometer and local code requirements for variations For liquefied petroleum gas reduce pipe diameter one size but maintain a 3 4 inch minimum diameter 2 Check supply pressure and local code requirements before preceding with work Table 5 Gas Supply Pressure Requirements Supply Pressure Natural Gas Propane Gas Water Column in kPa in kPa Minimum 6 1 5 11 2 8 Maximum 10 5 2 7 14 3 5 10 Ifthe gas supply pressure is less than required check for undersized pipe between the meter and the heater a restrictive fitting or an undersized gas meter Gas supply pressures to the heater when it is operating are listed in Table 5 NOTE The maximum inlet gas pressure must not exceed the specified value The minimum value listed is for the purpose of proper heater operation Refer to Table 11 To connect the gas supply line to the heater s gas valve you must first install a steel elbow supplied with the heater in the installation and instruction box Screw the elbow into the inlet side of the gas valve The heater is designed so that the gas supply line may enter through either side of the heater Hand tighten the elbow until the desired orientation is achieved AXCAUTION Do not over tighten the elbow Over tig
20. All auto chemical feeders must be installed downstream of the heater A check valve must be installed between the heater and the chemical feeder to prevent chemical corrosion of the heater s heat exchanger Do not put any chemicals into the filter skimmer or intake Concentrated chemicals can damage the heat exchanger and will void the manufacturer s warranty 3D 1 Pools The mineral content of swimming pool water increases daily due to natural evaporation and the addition of sanitizing chemicals If the mineral concentration in the pool gets too high the excess minerals will deposit on the walls of the pool in the filter system and in the heater tubes It is important to keep the pH factor of the pool water between 7 2 and 7 6 See Table 6 for guidelines on other chemical measurements 3D 2 Spas The proper chemical balance in spa water is more critical than in a swimming pool heater operation Due to the spa s size high water temperature and heavy usage chemical values in a spa can vary greatly This chemical imbalance can result in unsanitary water conditions and affect the life of the heater LX and LT Pool Heaters Page 23 FOR YOUR SAFETY READ BEFORE OPERATING AWARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life A This appliance does not have a pilot light It is equipped with an ignition device
21. F HEATER AND BOTTOM REFER TO MINIMOM OF 18 H TEETE M INCHES 46 CM He INLET AIR DUCT ABOVE THE FLOOR 0 Figure 6 Indoor Installation Venting USA or Outdoor Shelter Canada 2F 4b Vent Pipe Sizing and 1 The gas supply must be able to provide gas at Installation pressures specified in Table 5 As part of their certification the LX and LT have 2 Gas piping installation must be in accordance with been determined to be a Category I Fan Assisted the latest edition of ANSI Z223 1 In Canada the appliance They are intended for standard vertical venting installation must be in accordance with CAN B149 1 per tables provided in most local codes for Category I Fan or 2 and all local codes that apply Assisted appliances If the local code does not include such tables refer to the National Fuel Gas Code Z223 1 or the Canadian Installation Codes for Gas Appliances CAN 1 B149 1 amp 2 Note that the tables for fan assisted appliances include both maximum and minimum vent loading figures The primary purpose of the maximum ratings are to assure that the vent operates with negative pressure throughout its length The minimum ratings are to assure that vent gases don t cool too much and thereby assure that condensation doesn t occur It is important that all aspects of venting installation FOR NATURAL GAS be in accordance with local codes or in their absence the cited national codes Vent diameter height allowable length of h
22. H0214000B Installation and Operating Data JI FOR YOUR SAFETY This product must be installed and serviced by authorized person nel qualified in pool spa heater installation Improper installation and or operation can create carbon monoxide gas and flue gases which can cause serious injury property damage or death Improper installation and or operation will void the warranty Installation and Operation Manual LX and LT Gas Fired Pool Model and Spa Heater LX250 Shown A WARNING If these instructions are not followed exactly a fire or explosion may result causing property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier Laars walipie Technologies Inc TABLE OF CONTENTS SECTION 1 General Information 1A INMKOGUCTION a re even nini sie dih Aeon centers 1 1B DeSCriPtON aa 1 1C Warranty sic cette Git ene aves 1 SECTION 2 Installation Instructions 2A General Requirement
23. Panel Right Side Upper All R0330200 17 Nat Orifice 0 3K ft Set of 20 AL R0327900 62 Cover Panel Exhaust Switch All R0336600 17 Nat Orifice 3K 6K ft Set of 20 All R0328000 63 Panel Left Side Upper All R0335200 17 Nat Orifice 6K 9K ft Set of 20 All R0328100 64 CoverPlate I O Header Side All R0335300 17 LP Orifice 0 5K ft Set of 20 All R0328200 65 CoverPlate Return Header Side All R0335400 17 LP Orifice 5K 10K ft Set of 20 All R0328300 66 Cover Panel Left Side All R0335500 18 Anti Rotation Bracket All R0331800 67 RearPanel 250 400 R0330303 05 19 Gas Valve Nat w Street Ell All R0336800 68 CornerPosts All R0330400 70 Cover Temperature Control All RO330600 Exhaust System 71 Combustion Chamber Assy 250 400 R0330703 05 20 Flue Collector 250 400 R0331703 05 72 BasePanel 250 400 R0335603 05 21 BlowerAssy All R0329800 73 Igniter BoxAssembly All R0335700 22 Gasketw Blower Mounting Hardware All R0329900 74 Bracket Fusible Link All R0337200 23 FlueVent All R0331500 Optional 24 IndoorVentCollar 250 400 R0331403 05 74 Non Comb Base 250 400 R0330803 05 25 Outdoor Grill All R0328500 75 Touch up Paint All R0335800 26 Vent Hardware Kit All RO331600 76 Temperature Rise Measurement Kit All RO336000 77 Pressure Relief Valve All R0336100 Electrical 27 Transformer All R0328700 28 Fuse Assy In line All R0337100 PARTS NOT SHOWN ON KEY VIEW 29 Blower Pressure Switch All R0302000 30 Temperature Sensor All R0011800 NOTES 1 Whe
24. adjusted by means of a screw on the right hand side of the header To adjust the temperature rise to within the ranges specified in table 8 proceed as follows 1 If the piping system has an external bypass valve close it 2 Set the heater s control panel to the Off position 3 Start the filter pump 4 After three minutes note and record the thermometer reading This is the pool water temperature BYPASS ADJUSTMENT THERMOMETER WITH PETE S PLUG Figure 20 Temperature Rise Measurement Page 18 Laars 5 Start the heater by setting the control panel to either Pool or Spa Allow the heater to operate for five minutes or more Note and record the thermometer reading Subtract pool water temperature from this reading This difference is the temperature rise Refer to Table 8 If your measured temperature rise is within the range designated for your heater skip steps 6 through 8 6 Locate the bypass adjustment screw on the right hand side of the header see figure 20 Loosen the nut so that the screw can be adjusted A slight water leak past the nut may be expected Turn the screw counterclockwise to decrease the temperature rise and clockwise to increase the temperature rise as needed to achieve the ranges in Table 8 After the adjustment tighten the nut so that no leaks occur 7 Ifthe temperature rise is too low and cannot be raised by means of the adjustment screw the flow is in excess of
25. ater controls can be wired for remote operation All Waterpik Technologies Jandy RS Control Systems will permit the heater to be operated by remote control If you are setting up a new pool or spa system call your local distributor or the Waterpik Technologies Jandy Customer Service Department for information on the correct RS Control System to meet your needs To connect a Laars LX heater to an existing RS Control System first determine the revision level the programmed chip in the RS Control System s Power Center Board To check the revision level of the chip press and hold the reset button on the side of the indoor control panel for 10 seconds then release it A number will appear on the display for approximately 5 seconds This first number can be ignored After the first number disappears a second number will appear in the display window It will consist of 4 digits followed by a revision level REV _ If the revision level displayed here is at H or higher it will accommodate a Laars LX heater without any modification If the chip is at a revision G or lower the chip will have to be replaced with a newer version An alternate method for determining the revision level of the programmed chip in your RS control is described in steps 1 4 below An updated chip can obtained through Waterpik Technologies Jandy by ordering the PPD Kit Instructions for changing the chip are in the kit Do not connect more than two wires to any of t
26. consult your Waterpik Technologies dealer DANGER Improper installation or servicing can cause property damage injury or death due to fire asphyxiation or carbon monoxide poisoning 1C Warranty The LX and LT are sold with a limited factory warranty A copy of the warranty is included in a plastic bag inside the heater and on the back cover of this manual The home owner should fill out the warranty registration card included in the plastic bag and return it to Waterpik Technologies The warranty does not cover damage caused by improper installation operation or field modification or damage to the heat exchanger caused by corrosive water See Section 3D for guidelines on pool water chemistry SECTION 2 Installation Instructions 2A General Requirements All gas fired products require correct installation to assure safe and satisfactory operation The requirements for pool heaters include the following 1 Appropriate site location and clearances 2 Sufficient supply of clean air for combustion and ventilation Proper venting of products of combustion Properly sized gas pipe Properly sized gas meter Adequate water flow In the United States installation must be in accordance with local codes and the most recent edition of the National Fuel Gas Code ANSI Z223 1 The Code can be obtained from National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 In Canada install the heater in
27. e the combustion chamber refractory binder material is driven out by the heat of the flame White smoke and or sharp odors may be emitted from the vent during this period Do not inhale combustion product fumes at any time and especially when these fumes are being emitted This burn in period will last only a few minutes 2J 3 Gas Pressure Confirm that gas supply pressure is correct If the gas supply pressure is less than required check for undersized pipe between the meter and the heater a restrictive fitting or an undersized gas meter Gas supply pressures to the heater when it is operating are listed in Table 7 The manifold pressure may be checked by connecting a manometer to the pressure port on the outlet side of the valve The pressure will be zero when the heater is not running When the heater is operating the manifold gas pressure should be 4 0 we for natural gas and 9 0 we for LP within 2 wc To adjust the manifold gas pressure first remove the slotted cap next to the inlet pressure port on the inlet side of the gas valve Under the slotted cap is a slotted plastic screw which increases the manifold pressure when turned clockwise and decreases the manifold pressure when turned counterclockwise After measurements and adjustments if necessary have been made make sure to replace the 1 8 NPT gas valve plugs on the inlet and manifold pressure ports and the cap on the manifold pressure adjustment sc
28. e Geri ie 21 3D 2a Spa Water Chemistry 23 3D 2b Water Changing wwwwwwwmmmmmmmmamwmwmmamziza 23 3D 20 GONOSION ai ai si ji wien iii lje ele veliki 23 3D 2d Testing ws cident leva kel dl 23 3E Spa Hot Tub Safety Rules 23 3F Swimming Pool Energy Saving Tips 23 3G Seasonal Care 24 3G 1 Spring and Fall Operation 24 SG 2 WiNTELIZING EA 24 3H Periodic INSPECTION 24 3H 1 Owner Inspection wwwwwwmmmemmmmaammawmmammamiwa 24 3H 2 Professional Inspection 25 SECTION 4 Specifications and Dimensions 4A General Information 25 4A 1 Specifications seseriai eis 25 4A 2 DIMENSIONS zai rrain nannaa ipsia nnan iia 25 SECTION 5 Replacement Parts 5A General Information 26 5B Part Numbers enn 26 BC Exploded View Of Heater 27 5C 1 Overview Exploded View 27 50 2 Detail Exploded View 28 Warranty oiean ekv Back Cover LX and LT Pool Heaters Page 1 SECTION 1 General Information 1A Introduction This manual contains information for the proper installation and operation of the LX a
29. e runs improper electrical supply collateral damage caused by failure of O Rings DE grids or cartridge elements or damage caused by running the pump with insufficient quantities of water LIMITATION OF LIABILITY This is the only warranty given by Water Pik Technologies No one is authorized to make any other warranties on Water Pik Technologies behalf THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY WATER PIK TECHNOLOGIES EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL INCIDENTAL INDIRECT OR PUNITIVE DAMAGES FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY This warranty gives you specific legal rights You may also have other rights which vary by state or province WARRANTY CLAIMS For prompt warranty consideration contact your dealer and provide the following information proof of purchase model number serial number and date of installation The installer will contact the factory for instructions regarding the claim and to determine the location of the nearest designated service center If the dealer is not available you can locate a service center in your area by visiting www jandy com or by calling our technical support department at 707 776 8200 extension 260 All returned parts must have a Returned Material Authorization number to be evaluated under the terms of this warranty
30. ead screws located at the front edge of the bezel PVC OR CPVC PIPE 46 Slide the raceway cover up to the top of the heater Be careful not to pinch any wires Replace the two screws on the bottom flange to hold the cover in place 47 Replace the front panel door 21 2 Pool Spa Piping Systems Figure 15 illustrates typical piping for pool equipment in pool spa combination pools With their electronic temperature controls the LX and LT are particularly suited for this type of pool installation The heater must be protected from back siphoning of water which can result in dry starts If there is any chance of back siphoning provide a check valve between the pool and the filter pump inlet Arrangement of pool system components other than as illustrated in these diagrams can affect the operation of the heater s water pressure switch Location of the heater above or below the pool water surface can also affect operation of the switch In general the pressure switch can be adjusted to accommodate this effect if the heater water connections are no more than six feet below the pool water surface and no more than 15 feet above it See instructions for pressure switch adjustment in the heater start up section of this manual for more information about this Note that when pool equipment is located below the pool surface a leak can result in large scale water loss or flooding Waterpik Technologies cannot be responsible for such water lo
31. erate this heater outdoors at temperatures below 20 degrees Fahrenheit F 7 degrees Celsius C 2J 2 Start up Confirm that pool water is flowing normally through the pool system and equipment Start the heater in accordance with the Operating Instructions section of this manual with particular attention to the lighting and shutdown instructions and temperature control operation The heater may not start on the first try Air in the gas line or other start up situations may cause it to recycle It will lock out if ignition is not achieved in three attempts On the LX model heater to provide three additional attempts press and release the mode button until the indicator on the LCD screen aligns with OFF Now press and release the button again until the indicator on the LCD screen aligns with the desired setting either POOL or SPA To reset the cycle on the model LT press and release the mode button until the indicator lights for the SPA and POOL settings are off Then press and release it again until the indicator light for the desired setting is back on When the heater starts immediately feel the outlet header of the heater to confirm that there is adequate water flow The header should not be hot Normally water temperature will rise only a few degrees as it passes through the heater and a hot header or pipe indicates low water flow A WARNING When the heater is fired for the first tim
32. essure switch c Exhaust temperature limit switch d Automatic gas valve e Fusible Link f Temperature control g Control circuit fuse Perform a temperature rise test in accordance with Section 2J 5 61 4 7 If the heater is equipped with a pressure relief valve clean any accumulated corrosion and make sure that water runs freely through it 8 Inspect combustion chamber and burner for corrosion and indication of improper operation 9 Regularly inspect electrical controls for deterioration Repair and replace as necessary NOTE Keep this manual in a safe place for future reference by you and your professional technician when inspecting and servicing the heater SECTION 4 Specifications and Dimensions 4A General Information 4A 1 Specifications 1 The Laars LX and LT heaters are design certified by International Approval Services as a swimming pool heater under ANSI Standard Z21 56 for use in the United States and Standard CSA 4 7 for use in Canada 2 The Laars LX and LT are certified for use indoors and outdoors in the United States 3 The Laars LX pool heater is for use with natural gas or liquefied petroleum gas Ratings apply to either fuel 4 The Laars LX and LT high altitude heaters are derated at the factory to compensate for atmospheric conditions at elevations higher than 3000 feet above sea level 5 The Laars LX and LT require a 120VAC 60Hz or 240VAC 60Hz electrical supply
33. f drowning 3F Swimming Pool Energy Savings Tips Waterpik Technologies suggests the following to help conserve fuel and minimize the cost of operating your pool heater without sacrificing comfort 1 Set the heater temperature control no higher than 78 F 26 C The American Red Cross maintains that the healthiest water temperature for swimming is 78 F 26 C is Be certain you are using an accurate pool thermometer because a variance of 4 degrees from 78 to 82 F 26 to 28 C will use as much as 40 more gas 2 Carefully monitor the water temperature of your pool in the summer time because heater usage can be reduced due to warmer air temperatures 3 Find the proper setting on the pool heater temperature control and use the locking ring to discourage further adjustments 4 Set the filter time clock to start the pump no earlier than 6 00 AM during the pool heating season This is the time when nightly heat loss stabilizes 5 Ifthe pool is only going to be used on weekends reduce the heater temperature control setting by 8 or 10 degrees during the week It should be reset to the 78 F 26 C level before expected usage keeping in mind to allow enough lead time for the water to reach the desired temperature LX and LT Pool Heaters Page 25 6 During the winter shut down the heater by following the lighting and shutdown instructions in Section 3A When on vacation for longer than a week make sure the heater is s
34. for operation 6 The maximum working pressure of the Laars LX and LT heaters is 75 psig 4A 2 Dimensions Model No 250 400 Width A 28 1 4 341 4 Input BTU 250 000 400 000 Shipping Weight 206 Ibs 318lbs LX and LT Pool Heaters Page 27 SECTION 5 Key Model m ORDER Parts List No Description No PART NO s Electrical continued BA General Information 31 Gasket Temperature Sensor All E0116400 To order or purchase parts for the Waterpik 32 Plastic Sleeve Temperature Sensor All 10444900 Technologies LX or LT pool spa heater contact your nearest 33 Retainer Bracket Temp Sensor All 10447300 zala Screw Retainer Bracket All F0009100 Waterpik Technologies dealer or distributor If they cannot 35 Ignition Control All R0328800 supply you with what you need contact the Customer Service 36 Pressure Switch Assy All R0334500 Manager at Waterpik Technologies 37 Pressure Switch 2 psi All R0013200 38 SiphonLoop All R0334600 39 High Limits Set All R0023200 40 High Limit 135 F All R0022700 SB Part Numbers 41 High Limits 150 F All R0023000 Key PEN Moasi ORDER o 42 Harness High Limit Switch All R0334700 3 i zi 43 Retainer Plates High Limit Set of 2 All R0336500 Water Components 44 Hot Surface Ignitor All R0337000 45 Exhaust Temp Limit Switch All R0329400 1 Complete HeatExchanger Copper 250 400 R0326303 05 46 Wire Harnesses Complete All R0329500 2 Tube Assy Cu w Hdwr amp Gaske
35. h AGS automatic gas shut down EXT SW 2 extra switch 2 TEMP SENSOR temperature sensor Page 21 LX LT HEATER SERVICE DIAGNOSTIC GUIDE DISPLAY CODE CAUSE PRESS SW pressure switch Pump is not running Low pump pressure Device connected at Fireman Switch terminal block is open Pressure switch fault Water temperature in heater exceeds the internal limit Limit switch fault Flue gas vent switch tripped manual reset Vent switch fault Fusible link fault Broken split pinched or disconnected fan switch tubing Fan not operating Fan running slow or premature fan failure Air flow restricted at intake or discharge Oscillating pump pressure Low gas supply pressure No flame at burners Not used in this model 1 2 Faulty wiring or connection Failed Sensor REMEDY This is a normal display when the pump is OFF No Service Required Clean filter or clear blockage check position of valves in plumbing system This is a normal display when a device connected to the Fireman Switch operates to open the safety circuit on the heater Adjust or replace pressure switch Refer to qualified service personnel Identify and correct cause of overheating Refer to qualified service personnel Identify and correct loose connections or replace switches Refer to qualified service personnel Verify proper fan operation Check for restriction or bl
36. hanger is heavy combustion chamber 21 22 23 Note 24 25 Lift the heat exchanger assembly off of the combustion chamber and rotate it 180 so that the inlet outlet header is on the left side of the heater Carefully place the heat exchanger assembly back on top of the combustion chamber Be sure that the heat exchanger is level and that the finned tubes fit between the front and rear walls of the combustion chamber Be sure that the definned section of the tubes near the headers fit into the slots cut in the top of the insulation on the side walls of the combustion chamber Reinstall the end baffles on the heat exchanger Align the cut out portion of one of the baffles with the cut out section on the top of the front combustion chamber wall Set the baffle so that the flange fits completely over the combustion chamber wall Set the other baffle on the rear combustion chamber wall in the same manner There is no cut out section on the rear combustion chamber wall Carefully bend the water pressure switch s copper siphon loop tube so that it reaches the inlet outlet header now on the left side of the heater Do not straighten out the coil behind the raceway and do not kink the tubing Straightening the coil or kinking the tubing may result in poor heater operation Insert the end of the tube into the fitting on the header Tighten the nut onto the fitting one half turn past hand tight Route the
37. he terminals in the RS Control System when connecting peripheral devices If connecting the LX heater to the RS Control System creates this situation then a Multiplexing PCB kit must be used Call your distributor or Waterpik Technologies to order the kit To connect the Laars LX to your RS control System follow the steps listed below See fig 12 1 Turn off the power to the heater and the RS Control 2 Open the RS Power Center Enclosure and remove the front dead panel NOTE Only a revision H or higher program chip in the RS system will support the LX Heater Interface Page 10 Laars Remove the two screws holding the bezel in place Turn the bezel over to view the circuit board on the back 4 Locate the programmed chip on the Power Center Board the larger square chip in the lower right corner of the circuit board In the center of the chip is the revision letter If the revision letter is H or higher go to step 5 If the revision level is G or lower replace the chip Directions for removal and installation of the chip are provided in the new PPD Kit La NOTE If ordering a new programmed chip be sure to order the part number printed on the chip currently in your RS control 5 Use 22 gauge 4 conductor wire WP J part 4278 to run between the heater and the RS control and match the wire color order 6 The wires coming from the LX heater can be doubled up on the red terminal bar with
38. he water reaches the temperature setting on the thermostat When that happens the heater will shut off automatically but the filter pump will keep running LX and LT Pool Heaters Page 19 A CAUTION 3B ig eal e Controls e LX and LT heaters have temperature controls Keep all objects off the top of the heater and that can be set to heat the pool and spa with independent do not obstruct louvre openings in heater temperature settings The controls display information to sides Blocking ventilation air flow may indicate that the heater needs service and diagnostic damage the heater and void the warranty information for the service person see Figure 21 The LX utilizes a liquid crystal display LCD screen to display the information while the LT uses indicator lights The LX Temperature Control also displays pool spa water temperature and allows for precise temperature settings of LAA RS the heater 4 The controls allow the heater to directly interface with all Waterpik Technologies Jandy remote control ENA units The LX offers full remote control capabilities while POOL Hosting OFF lt the LT controls offer limited remote control LAARSK SERVICE Low Pressure 188 1882 Hi Lim Sw 3B 1 Information Displayed coe Me ee The Model LX displays information on a Liquid WA ZA Crystal Display LCD screen The temperature control displays the water temperature of the pool or spa as well as Ext
39. heater however it may be required by local codes To install a pressure relief valve do the following 1 To protect the threads while drilling screw the brass adapter included with the Waterpik Technologies PRV kit into the blind threaded hole on the top of the inlet outlet header TEMPORARILY INSTALL BRASS ADAPTER TO PROTECT PLASTIC START WITH 1 4 BIT THREADS THEN OPEN HOLE WITH A 3 8 BIT THEN OPEN HOLE WITH A 1 2 BIT Figure 17 Drill Hole For Pressure Relief Valve BRASS ADAPTER PRESSURE RELIEF VALVE HAND TIGHTEN ae Figure 18 Pressure Relief Valve Installation 2 Using the countersink in the center of the blind hole as a guide drill a 1 4 inch hole through the plastic 3 Open the hole by reaming it with a 3 8 inch drill bit 4 Open the hole again by reaming it with a 1 2 inch drill bit A WARNING Initially drilling a 1 2 inch hole without reaming may cause the bit to grab on the plastic This may cause personal injury or damage to the plastic header 5 Remove the brass adapter and clean the cuttings out of the hole 6 Install the rubber washer at the bottom of the hole 7 Thread the adapter into the hole and tighten so that it seals against the rubber washer 8 With a permanent marker place a mark on the adapter so that the mark faces the same direction as the water connections on the header 9 Remove the adapter from the hole 10
40. htening will crack the gas valve Do not use teflon tape to wrap the elbow threads Page 7 LX and LT Pool Heaters NOTIJA A JOVAL MOTISA HIMALIHM A M JOVAL Gad HLM ILH H M JOVAL MOVIE HLIM JLH M9 M JUHM M agy a Jld ild Ad JONVIO O WUD AD JOVAL MOTISA HIM Njo NO NIAo 9 Nao ug ania 1 JOVAL MOTISA HIM Yo via AMA Movie yd A OVZ NOZL GRIM AO AYZ AJAIM AUOLOVA wesbeig BULA oul sajBojouy99 Mido Mm UaTIONLNOD DINOALOITI UAWYOASN Va v 3904 OVAZL Ovoz x MA Maj AM AJ 9 UNO ENYI CONO J Awaove JDUNOS wdaMOd ya dJWMWJH L FR ET JATVA SV AN YaLINSI M M JSNJS 4WV14 E KOG XJLNSI WOSNIS dNaL dJIYM ya id e INVA AN Z svo MW ya ya ya HOLMS RUNSSRd s Na uamo Sd ya Hous Naaf anza ESN IVONA INJA nI S3HOLMS Sel Ln m HOIH osl 7m HOLMS uNgsaeld M RENIN Sd za TA TE HL Ta TONO NOLINSI aN Nya aNd 5 NZ 7 HO JNUS useq sey dwnd 13414 JU Joye UNI O JaMOd ney zsnw Jajbay SIY UO UB SUL 9O 9 BU Jo Aejas dund J Jo opis nd no JO peol OU 0 J9 E9U 24 JO amod y JJJUUOI JOU OG NOILNVD omd 3129013234 N MJDVI Nid SL NId SL ojojo Aorz uf ojojo elele do aozi xaf 21912 al ojojo eee o o o o e e e lod al al oh old sb al oh SV x U2IVM HOLMS JUNSSI IA NJJOS ONnodoD D iQ a e g X af zaf ay AF MI af Taj zaf A MI ME MI UJW UOJSNVUL
41. hut off at the temperature control panel 7 Where possible shelter the pool from prevailing winds with well trimmed hedges or other landscaping cabanas or fencing 8 Always use a pool cover when practical Besides providing a valuable safety feature a pool cover will reduce heat loss conserve chemicals and reduce the load on filter systems 3G Seasonal Care 3G 1 Spring and Fall Operation During periods when the pool is only going to be used once in a while set the thermostat control to the lowest temperature for both modes This prevents the pool from becoming chilled yet still requires the least amount of time to raise the water back up to swimming temperature If the heater is not going to be used for a long period of time shut it down completely following the instructions in Section 3C 2 Shutdown or the lighting and shutdown instructions posted inside the heater 3G 2 Winterizing If you don t plan to use the pool or spa over the winter and your area is subject to freezing temperatures have a qualified professional technician perform the following steps to protect the heater 1 Shut off the heater s gas valve according to the lighting and shutdown instructions 2 Shut off the main supply gas cock outside the heater jacket 3 Completely drain the heater before the first frost To drain the heater remove the drain plug from the right side of the inlet outlet header see Figure 23 4 Return the dra
42. ical supply To convert to 120 Volt 60 Hz AC requires the changing of the fifteen pin connector assembly on the component raceway Remove the fifteen pin connector from the receptacle located directly below the fan intake on the raceway All the wires on the connector are red and the connector is marked 240V The fifteen pin connector will have two CONNECT WIRES INSIDE HEATER CONDUIT WIRES Z ELBOW AS SHIPPED Figure 9 Field Wiring Connections wires that lead to a two position terminal block located next to the connector Remove the two wires from the terminal block Take the fifteen pin connector assembly with the black wires from the installation and instructions box It is marked 120V Connect the two long wires to the two position terminal block Either wire may be connected to either tab on the terminal block the connections are not polarity sensitive Plug the fifteen pin connector into the receptacle The connector is keyed so it will fit in only one orientation Electrical wiring must be in accordance with the latest edition of the National Electric Code NEC ANSI National Fire Protection Association NFPA 70 unless local code requirements indicate otherwise A CAUTION DO NOT connect power to the LX or LT pool heater from the load side of a filter pump relay or time clock To wire the Laars LX or LT heater 1 Wire the heater to a 120V or 240V 60 Hertz Hz
43. ide the heater A WARNING Do not attempt repairs on the gas control or appliance Tampering is dangerous and voids all warranties AMA WARNING LP GAS To avoid possible injury fire and explosion read and follow these precautions and all instructions on this appliance before starting the heater LP propane gas is heavier than air and will remain at ground level if there is a leak Before lighting sniff at ground level If you smell gas follow these rules 1 DO NOT light matches DO NOT turn electric lights or switches on or off in area DO NOT use an electric fan to remove the gas from area Shut off gas at LP tank 3 Telephone gas company and fire department for instructions Give your name address and phone number ha If your LP tank runs out of fuel turn off gas at the appliance After the tank is refilled the appliance must be restarted according to the instructions located on the inside of the door YA Start Up Procedure With any new pool or spa installation run the filter pump with the heater off long enough to completely clean the water This removes any installation residue from the water Clean the filter at the end of this operation before starting the heater Do not operate the heater unless the pool is properly filled with water When raising the temperature of water in a cold pool remove all time clock settings This lets the filter system and heater operate continuously until t
44. in place They are located on the bottom flange of the raceway cover Slide the raceway cover down to expose the raceway Remove the control panel assembly from the top panel Lift the control panel cover Remove the two philips head screws located at the front edge of the bezel Lift the front of the bezel up until the entire assembly comes away from the top Without removing any wires slip the control assembly through the hole so that when the top is removed the control assembly will stay with the heater Remove the four philips head screws that fasten the vent grill to the top Remove the vent grill Remove the top There are two hex head screws at the upper corners of the raceway And there are two philips head screws at the upper corners of the rear panel Disconnect the blower pressure switch rubber tubing from the blower assembly housing Disconnect the two white wires from the vent switch located just above the inlet outlet header Remove the EMI shield metal plate covering the motor on the blower Disconnect the five blower wires from the terminal strip on the back of the raceway Remove the four hex head screws holding the blower to the flue collector Lift the blower and the exhaust vent off of the flue collector Remove hex head screws holding the flue collector to the top of the combustion chamber There are 10 screws on a model 400 and 6 screws on a model 250 Remove the flue collector and set it aside Rem
45. in plug to the manifold but do not tighten DRAIN PLUG FIGURE 23 Draining the Heater 5 Disconnect the copper tubing from the pressure switch fitting see Figure 24 6 Cover the vent grille so that snow will not accumulate in the combustion blower where it may freeze To reactivate the heater in the spring have a qualified professional technician reassemble the heater as follows 1 Attach the pressure switch fitting to the copper tubing see Figure 24 2 Tighten the drain plugs in the headers WA Uncover the vent grille 4 Turn on the main supply gas cock outside the heater jacket 5 Turn on the heater according to the lighting and shutdown instructions on the back of the heater door SIPHON LOOP PRESSURE a SWITCH Ve RECONNECT TO WINTERIZE ao DISCONNECT BE ORE SIPHON STARTING LOOP ae THE HEATER FIGURE 24 WINTERIZING THE PRESSURE SWITCH 3H Periodic Inspection A WARNING Improper installation or maintenance can cause nausea or asphyxiation from carbon monoxide or flue gases which could result in severe injury property damage or death 3H 1 Owner Inspection Waterpik Technologies has designed and constructed the LX heater to provide long performance life when installed and operated properly under normal conditions The following basic guidelines should be maintained 1 Keep the top of the heater clear of all debris and make sure there is no
46. ing under the LAARS LX logo toward the center of the upper p m portion of the screen The Model LT displays this information by lighting a set of indicator lights located on the front of the control panel On the upper right hand portion of the LCD screen on the Model LX is a selector arrow Directly to the left of K the selector arrow are three positions They are POOL make BD mi OFF and SPAY This part of the display indicates the mode of operation in which the heater is set The mode of operation of the Model LT is shown by two indicator lights labeled SPA and POOL z Underneath the mode selector on the Model LX P Tho ET Control Panal Display display screen is a Backlight indicator To turn the backlight on press the middle button to the right of the Figure 21 Temperature Control Panel screen labeled Backlight A A S iin Page 20 Laars Below the Backlight indicator is an RS service indicator which displays RS Online when the heater is connected to an RS unit Directly below the RS Service indicator on the bottom right hand portion of the LCD screen is the Fahrenheit Celsius temperature unit indicator The Model LT does not offer these features 3B 2 Turning the Heater On or Off When power is supplied to the Model LX heater the control goes into a diagnostic mode for approximately 15 seconds befo
47. ing the jumper wire on the terminal block located in the control compartment see Figure 8 and connecting the two wires from the remote to the two terminals on the terminal block This type of remote control will turn the heater on or off but will not perform any other function Figure 14 Water Connection Reversed Consult with Waterpik Technologies Service Department with questions about installing remote controls manufactured by companies other than Waterpik Technologies 21 Water Piping 2l 1 Reversal of Heater Water Connections The LX and LT are shipped with water connections on the right side but they can be modified in the field to provide left side water connections This procedure involves removing the heat exchanger and reinstalling it opposite to it s original position Some of the heater wiring and control components must be relocated so this procedure must be done only by a trained service technician Heat exchanger reversals are generally done before the installation of power and water to the heater If you need to reverse the heat exchanger on a previously installed heater be sure that all electrical power and water supply has been turned off before starting the procedure Water connection reversal is illustrated in Figures 13 and 14 Proceed as follows 1 Remove the heater front panel door LX and LT Pool Heaters Remove the two hex head screws that hold the raceway cover
48. ion The LX and LT heaters can be installed in the outdoor configuration as received from the factory Locate the heater in an open unroofed area Do not install the heater under a deck Do not locate the heater below or adjacent to any doors windows louvers grills etc which connect in any way with an inhabited area of a building even though the access might be through another structure e g a garage or utility room In the United States there must be a minimum of 4 feet 1 22 m horizontally or vertically between the heater and any door glass opening or gravity inlet to a building see Figure 2 AADANGER United States Do not install the heater with the top of the vent assembly within 4 feet 1 22 m of any opening into a building Canada Do not install the heater with the top of the vent assembly within 10 feet 3 05 m of any opening into a building If the heater is installed under an overhang there must be a minimum clearance of 5 feet 1 5 m above the top of the heater and the structure should not overhang the heater more than 12 inches 0 30 m The area under the overhang must be open on three sides If the heater is installed close to a structure protect it USA 4 ft 1 22 m CANADA 10 ft 3 05 m aro F Figure 2 Outdoor Heater Installation from rain water runoff by means of gutters roof water diverters or simila
49. looring Typical Installation The heater must not be installed on combustible flooring without special measures to assure that the floor temperatures will not be excessive A special base for combustible floors may be obtained from Waterpik Technologies The part number appears in the parts list at the back of this manual see Section 5 In the United States the National Fuel Gas Code allows a heater to be placed on a combustible surface when there is a platform under the heater made of hollow masonry no less than 4 inches 102 millimeters mm thick covered with sheet metal at least 24 gauge thick and extending beyond the full width and depth of the heater by at least 6 inches 76 2 mm in all directions The masonry must be laid with ends unsealed and joints matched to provide free circulation of air from side to side through the masonry see Figure 1 2C 2 Installation Clearances Clearances between the heater and combustible material must be per Table 1 Table 1 Minimum Heater Clearances from Combustible Surfaces All Installations U S and Canada Side of Heater Notes 1 Blocks must provide solid base and be braced so they cannot slip out of place 2 Air openings in blocks must be arranged to provide unrestricted opening through entire width or length of base Figure 1 Non Combustible Platform LX and LT Pool Heaters Page 3 2D Outdoor Installat
50. many appliances and it is best to specifically provide combustion air means Table 2 Air Openings to Outside Required Net Free Open Area for Combustion Air Openings Figure 5 Vent Pipe Installation 2F 2 Special Location Requirement Virtually all local installation codes require that a heater installed in a garage or similar structure be on a platform at least 18 inches 46 cm above the floor This requirement is in consideration of possible existence of combustible fumes at floor level Consider such installations carefully and do not proceed if there is any possibility of such fumes being ignited by the heater 2F 3 Air For Combustion and Ventilation It is very important that the heater be provided with adequate air for combustion and to ventilate the space in which it is located Provide combustion and ventilation air as specified in local codes or in their absence per the National Fuel Gas Code ANSI Z223 1 or the Canadian Installation Codes for Gas Burning Appliances CAN 1 B149 1 amp 2 In general the codes require that the space in which the heater is located be provided with two combustion air openings one within 12 of the floor and one within 12 of the ceiling see Figure 6 If air is supplied directly from the outside the openings must provide one square Direct from outside Duct from outside Model in cm in cm 250 63 406 126 813
51. n ordering a kit for a model 250 specify as R HHH 03 When ordering a kit for a model 400 specify as R HHH 05 All hardware sets contain all pieces necessary for assembly including gaskets Not shown Gaskets and hardware are included in all kits that involve the removal of a gasket as part of the procedure to replace a part Laars Page 28 5C Exploded View 5C 1 Overview 24 SEE NEXT A A c lt 4 Y SLAB Po ii g aa A SEN Z N PAGE FOR DETAIL 62 57 DETAIL SEE NEXT PAGE FOR DETAIL EE NEXT PAGE FOR SEE NEXT PAGE FOR DETAIL 45 ge 6 K D eL P 21 O SEE NEXT PAGEFOR DETAIL Page 29 LX and LT Pool Heaters 5C 2 Detail View INN N 5 RA 9 fe SE X CTY TSN YA A LIMITED WARRANTY Thank you for purchasing Jandy pool and spa products Water Pik Technologies manufacturer of Jandy products including Laars pool and spa heaters warrants all parts to be free from manufacturing defects in materials and workmanship for a period of one year from the date of retail purchase with the following exceptions e AquaLink RS units installed with Jandy Surge Protection Kits will be covered for two years e NeverLube valves are warranted for the life of pool and or spa on which they were originally installed This warranty is limited to the first retail purchaser is not t
52. nd LT pool spa heaters Certain sections are specific to United States or Canadian installations and are labeled United States or Canada Procedures in this manual must be followed exactly To obtain additional copies of this manual contact Waterpik Technologies For address information see back cover 1B Description The Laars LX and LT have no standing pilot burner They exceed the requirements of energy conservation regulations such as those in California Hawaii New York Oregon and other states which require that a pool heater not have a continuous ignition source The heaters are designed to operate in conventional swimming pool and spa equipment arrangements They require 120V or 240V 60 Hz electrical power The Laars LX and LT are certified by International Approval Services Inc to comply with latest editions of applicable U S Canadian combined standard for gas fired pool heaters In the United States the applicable standard is ANSI Standard Z21 56 for gas fired pool heaters In Canada it is Standard CSA 4 7 As such the heater carries both the AGA and CGA logos The heaters have been designed specifically to heat fresh water swimming pools and spas and with proper installation and care they will provide years of reliable service Do not use the heaters to maintain pool or spa water temperature below 70 F Do not use them as heating boilers or general service water heaters or to heat salt water For special applications
53. nd the gas valve will energize The water temperature and flue temperature will increase as gas combustion takes place The heater will attempt to ignite three times in succession If after three attempts for ignition the heater does not sense the presence of flame the heater goes into a lockout mode and must be reset to fire This can be done on both model heaters by pressing and releasing the mode button so that the heater is turned off and then returned to the desired mode If the heater cannot fire a diagnostic message is displayed on the left side of the Model LX LCD screen on the control panel or by a lighted indicator on the Model LT control panel Review the potential causes listed on the opposite page for the code on the display The unit may require service from a qualified professional serviceman Contact Waterpik Technologies for your nearest qualified service organization Be sure to note the serial number and model number before calling The address of Waterpik Technologies is displayed on the rear cover of this manual IMPORTANT The temperature controls cannot be calibrated in the field If the temperature control does not work shut down the heater and replace the temperature control DO NOT rely on temperature control to shut the heater off Remove the heater door and turn the main gas valve to OFF 3C Lighting and Shutdown 3C 1 Lighting the Heater A WARNING Do not attempt to light the heater with the do
54. not offer the remote control indicator function To turn the heater on press and release the button located between the POOL and SPA indicator lights Repeat pressing the button to achieve the desired mode of operation shown by the indicator lights When neither light is on the heater is OFF It is now necessary to set the thermostat to the desired pool or spa setting 3B 3 Setting Pool and Spa Temps Changing from Fahrenheit to Celsius The Model LX heater displays temperature in Fahrenheit units when powered up To switch to Celsius press the F C button Once the desired temperature units are selected the thermostat can be set The left most button below the LCD screen labelled Select will select either the Pool or the Spa thermostat when depressed GAS CONTROL IN ON POSITION FIGURE 22 GAS VALVE Either Pool or Spa will be displayed in the bottom left corner of the LCD screen The up and down buttons will increase or decrease the thermostat setting The Model LT heater control is less quantitative and not automatic The pool or spa water temperature will need to be monitored manually as the control is adjusted Temperature adjustments are made by turning the knob assosiated with the mode labeled below it Turning the knob clockwise will increase the temperature setting Turning it counterclockwise will decrease the setting Once the desired setting is acheived set the temperatu
55. o a low pH value combined with other chemistry problems The condition can be corrected by changing the spa water and closely monitoring the pH factor and chemical properties of the water see Table 6 3D 2b Water Changing Waterpik Technologies recommends changing of spa water every 60 days if usage is light and every 30 days during heavy usage Be sure to stabilize the water chemistry after every water change 3D 2c Corrosion The corrosive action of pool spa water is increased by the following 1 Low pH acidity 2 Low Total Alkalinity bicarbonates a 3 Low Calcium hardness soft water NOTE Waterpik Technologies does not warrant heat exchangers damaged by corrosive water 3D 2d Testing Waterpik Technologies recommends that spa owners purchase a test kit and use it regularly A minimum kit is one which will measure chlorine and pH levels The pool spa owner will find it helpful to have a qualified professional technician perform more extensive chemical testing and water changing on a regular basis 3E Spa Hot Tub Safety Rules The following Safety Rules for Hot Tubs recommended by the U S Consumer Product Safety Commission should be observed when using the spa 1 Spa or hot tub water temperature 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
56. o not use flexible gas connectors which restrict gas flow to the heater 6 Table 4 specifies sizing for gas supply piping based on 1 2 WC 3 45 kPa pressure drop in the piping Larger piping may be necessary if the local gas supply is at pressures which will not guarantee adequate pressure at the heater Table 5 specifies the maximum and minimum supply pressures necessary at the heater when it is operating 7 Install a sediment trap drip leg ahead of the gas controls see Figure 7 Fit the trap with a threaded cap which can be removed for cleaning 8 Install a manual gas shut off valve for service and safety Do not use a restrictive gas cock AXCAUTION Permanent damage to the gas valve will occur if the following procedures are not followed 9 Disconnect the heater and its individual shutoff valve from the gas supply system during pressure testing of the system at pressures higher than 1 2 pounds per square inch psi 3 45 kilopascals kPa If the test pressure is equal to or less than 1 2 psi 3 45 kPa close the manual shutoff valve on the heater during the piping pressure test Manual Shutoff Gas Supply Inlet Equipment Inlet Figure 7 The Proper Design for a Sediment Trap Drip Leg Table 4 Natural Gas Pipe Size Requirements Distance from Gas Meter 0 50 feet 50 100 feet 100 200 feet Heater 0 15 m 15 30 m 30 60 m Size in in in 250 1 1 1 4 1 1 4 40
57. ockage of flue Reset switch after problem is corrected Identify and correct loose connections or replace switch Refer to qualified service personnel Identify and correct loose connections or replace fusible link Refer to qualified service personnel Check tubing and replace if necessary Correct fault or replace fan Refer to qualified service personnel Verify proper wiring for 120VAC or 240VAC Refer to qualified service personnel Check for proper clearances around heater and for adequate room ventilation if enclosed Inspect for blockage or restriction at discharge or flue Refer to qualified service personnel Clean filter or identify and repair cause of pump oscillation Identify and repair incorrect supply pipe size or pipe line blockage Refer to qualified service personnel Identify and correct loose wiring connections or problems with igniter flame sensor gas valve or ignition control Refer to qualified service personnel Inspect Sensor wiring Ensure sensor is plugged into back of control panel Replace Temperature Sensor Refer to qualified service personnel NOTE When these messages are displayed the Controls are still operable and the heater will operate normally when the displayed condition is remedied Faults shown above without an asterisk will shut down the Heater and Control Panel and a flashing SERVICE is displayed Page 22 Laars then the ignitor will glow a
58. or off Doing so may cause severe bodily injury Lighting and shutdown instructions are listed on the label attached to the inside of the heater door and on the following page Lighting instructions are as follows 1 Turn off all electrical power to the heater at the main junction box 2 Remove the heater door and turn the heater gas valve to off 3 Wait 5 minutes before trying to start the heater 4 Turn the gas valve control knob counterclockwise to ON see Figure 22 5 Replace the heater door 6 Turn on electrical power to the heater 7 Turn on the filter pump 8 Set the heater controls to the SPA position mode If the temperature of the water exceeds the thermostat setting it is necessary to increase the thermostat setting to exceed the water temperature Adjust the thermostat setting to be greater than the water temperature desired temperature The ignitor lights the burner when the thermostat calls for heat 9 Set the time clock if one is installed 3C 2 Shutdown Complete shutdown instructions are as follows 1 Set both temperature controls to their lowest setting 2 Press and release the mode button until the indicators show that the heater is off 3 Turn off all electrical power to the heater at the junction box 4 Open the heater door and turn the gas valve knob clockwise to off 5 Shut off the external gas supply valve to the heater 3D Water Chemistry Caution
59. orizontal runs vent cap requirements location Check the rating plate to make sure the heater is fitted for the type of gas being used Waterpik Technologies heaters shipped from the factory are certified to operate at an altitude of 0 to 3000 feet 0 to 915 m for natural gas and 0 to 5000 feet 0 to 1525 m for propane or if so ordered at higher altitudes In the United States the heater manifold is marked with a tag or sticker indicating one of the following high altitude operation codes WA a High altitude H 3 000 to 6 000 feet 915 to 1830 m and height of vent terminations on a roof and many other b High altitude J 6 000 to 10 000 feet important matters are covered in these codes Proper 1830 to 3050 m installation of the LX and LT heaters requires that all FOR PROPANE GAS these factors be correctly handled a High altitude H 5 000 to 10 000 feet 2G Gas Supply and Piping 1525 to 3050 m 2G 1 General Instructions 4 In Canada the heater rating plate is marked for Review the following general instructions before specific altitude requirements as follows continuing the installation FOR NATURAL GAS a Factory Released 0 to 2 000 feet 0 to 610 m Page 6 Laars b High altitude H 2 000 to 4 500 feet 610 to 1370 m FOR PROPANE GAS a Factory Released 0 to 4 500 feet 610 to 1370 m 5 Use only wrought steel piping or when permitted by local codes other rigid piping material D
60. ove the water pressure switch s copper siphon loop tube from the header by first loosening the brass nut at the pressure fitting Then carefully pull the tube out of the fitting There should be about two inches of tubing inside the header Be careful not to create any kinks in the tubing when handling it Clip the wire tie that bundles the wire harnesses leading from the control panel Disconnect the two black temperature sensor wires from the back of the control panel Coil the wires and place them on top of the heat exchanger Disconnect the high limit switch black wires from the wire harness leading to the control panel There are quick disconnects at the end of the wires Remove the inlet outlet header side cover plate located under the inlet outlet header There are four philips head screws one in each corner holding it in place 20 Page 11 Slide the upper right side panel up and out of the corner posts and place it aside Remove the left side cover panel held to the lower panel with two philips head screws at the corners Remove the flat return header side cover plate to expose the return header by removing the four philips head screws one in each corner Slide the upper left side panel up and out of the corner posts and place it aside Remove the end baffles from the heat exchanger the It may be necessary to have help lifting the heat exchanger to remove it and replace it on A WARNING The heat erc
61. pass which accommodates a wide range of water flow The bypass is easily adjustable to change the temperature rise for optimum performance and length of heater life The bypass assures constant heat exchanger flow even though flow through the filter system will vary depending on how dirty the filter is For most installations an external bypass valve is not needed in the heater water piping This is due to the large size of the heater s internal bypass valve If the pump flow rate is known to significantly exceed 125 gpm 7 9 l s an external bypass may be needed to assure proper heater operation Water flow should be confirmed upon start up of the heater and in most servicing situations If the flow is not normal corrections must be made to the pool system Flow is evaluated by determining the water temperature rise through the heat exchanger Before checking the temperature rise make sure that the pool filter is clean If necessary clean all components of the filter system Temperature rise is measured in the outlet of the far right tubes when facing the inlet outlet water heater To measure the temperature rise turn off the filter pump and remove the plastic plug to the right of and just below the level of the outlet water pipe This is mounted flush with the heater jacket See Figure 20 With the plug removed install the special thread adapter and Pete s plug fitting and insert a pocket thermometer The internal bypass can be
62. r measures Do not locate the heater close to irrigation sprinklers Water from sprinklers may damage controls and electronic components Avoid locations where wind deflection off nearby structures might cause wind loading and downdraft conditions Where downdraft conditions exist locate the heater at least 3 feet 0 91 m from vertical surfaces e g nearby buildings and walls Install the heater at least 5 feet 1 52 meters from the inside wall of the pool or spa unless the heater is separated from the pool or spa by a five foot 1 52 meter high solid fence wall or other permanent barrier 2E Outdoor Shelter Installation Canada An outdoor shelter is an unoccupied enclosure which does not communicate directly with occupied areas The LX and LT may be installed in such a shelter only when the installation is in accordance with local codes and the most recent edition of Standard CAN CGA B 149 These codes and standards and Waterpik Technologies require that the heater be properly vented as outlined in this manual Other requirements also apply such as provision of ample uncontaminated air for combustion and ventilation 2F Indoor Installation 2F 1 Preparation of Heater for Indoor Installation If the LX or LT is to be installed indoors its exhaust discharge grill must be converted to a collar for vent pipe connection The necessary vent collar gasket and screws can be ordered as parts kit R0331403 or R0331405 see parts lis
63. ransferable and does not apply to products that have been moved from their original installation sites The liability of Water Pik Technologies shall not exceed the repair or replacement of defective parts and does not include any costs for labor to remove and reinstall the defective part transportation to or from the factory and any other materials required to make the repair This warranty does not cover failures or malfunctions resulting from the following 1 Failure to properly install operate or maintain the product s in accordance with our published Installation Operation and Maintenance Manuals provided with the product s 2 The workmanship of any installer of the product s 3 Not maintaining a proper chemical balance in your pool and or spa pH level between 7 2 and 7 8 Total Alkalinity TA between 80 to 120 ppm Total Dissolved Solids TDS less than 2000 Abuse alteration accident fire flood lightning rodents insects negligence or acts of God Scaling freezing or other conditions causing inadequate water circulation Operating the product s at water flow rates outside the published minimum and maximum specifications Use of non factory authorized parts or accessories in conjunction with the product s Chemical contamination of combustion air or improper use of sanitizing chemicals such as introducing sanitizing chemicals upstream of the heater and cleaner hose or through the skimmer Overheating incorrect wir
64. re lock by loosening the screw located at the bottom of the knob and rotating the dial stop counterclockwise until it contacts the knob Tighten the screw to lock the stop in place When the thermostat setting exceeds the temperature of the pool or spa the heater will fire The heater will fire continuously until the pool or spa water is heated to the selected thermostat temperature The control will not allow the heater to fire again for five minutes even if there is a call for heat unless the thermostat setting is increased In this case the heater will fire within two minutes This is to prevent short cycling and thereby increase the life of the heater When the Model LX heater is firing Heating will be displayed underneath the LAARS LX logo Note that in both the POOL and SPA thermostat settings the temperature cannot be raised above 104 F 40 C Note that if power is momentarily lost the thermostat settings will remain the same Also note that the heater should not be used to maintain water temperatures at or below 70 F 21 C This will damage the heater 3B 4 Error Status If the heater is powered in either pool or spa mode and there is a call for heat i e the thermostat setting is higher than the water temperature the heater will fire The blower will come on for approximately 30 seconds LX and LT Pool Heaters HI LIM SW hi limit switch EXT SW 1 extra switch 1 AIR FLO SW air flow switc
65. re the heater can be turned to the Pool or Spa mode During this time the display will show RS Online If there is an RS control connected to the heater it will sense the RS unit and remain online If the control is not connected to an RS unit the RS Online indication on the display will disappear after the initial 15 seconds When the display shows RS ONLINE all functionality of the control at the heater is disabled The heater functions can be controlled only at the RS unit However sensor data is displayed at both the heater and the RS unit To temporarily use the heater controls when online with an RS control unit use a thin object to depress the button marked RS SERVICE The RS ONLINE indicator will disappear from the heater display All functionality has now been returned to the control at the heater In this mode the RS unit has been disabled To return the functionality to the RS unit push the button again When power is first supplied to the Model LT heater it also runs through a circuit board diagnosis to make sure that the control is working correctly Indicator lights will flash during the 10 second diagnostic sequence After the initial diagnostic sequence on the Model LX the heater can be turned to Pool or Spa mode by pressing and releasing the top mode button to the right of the LCD screen so that the selector arrow is aligned with either the Pool or Spa setting as seen on the LCD screen The Model LT heater does
66. rew It is extremely important to replace these parts before leaving the installation Failure to do so can result in damage to property or injury or death With the heater firing the pressure must be within the range shown in Table 7 Also check the pressure with the heater off Table 7 Gas Supply Pressure Requirements Natural Gas 6 0 Inches WC 11 0 Inches WC 1 5 kPa 2 8 kPa LP Gas 10 5 Inches WC 14 0 Inches WC 2 7 kPa 3 5 kPa Natural Gas 4 0 Inches WC 1 0 kPa LP Gas 9 0 Inches WC 2 3 kPa 2J 4 Adjustment of Water Pressure Switch If the heater is installed in line with a two speed pump the pressure switch MUST be adjusted to prevent the heater from firing on low speed or low flow pump operation The pressure switch is preset at the factory for normal pool installations Do not adjust it unless the heater s water connections are more than three feet above or below the pool surface If they are not in this range the pressure switch must be adjusted This can be done in the field if the water connections are no more than six feet above the pool surface or no more than ten feet below it For other situations contact a Waterpik Technologies representative AMA WARNING The pressure switch should be adjusted to turn the heater off when the pump is off Setting the switch to close at too low of a flow can damage the appliance LX and LT Pool Heaters Page 17 Pry off cap
67. seeseeeeeeeseeeeeeeeeeeeaes 9 2l Water Piping 2 ccceecceeseeeeeeseeeeeeteeeeeeneneneeeees 10 2l 1 Reversal of Heater Water Connections 10 2l 2 Pool Spa Piping Systems 13 21 3 Connections at Heater 13 21 4 Pressure Relief Valve 14 21 5 Automatic Chlorinators Chemical Feeders 15 2J Start Up and Adjustment 15 2J 1 Normal Operation cccceeeceeeeeeseeeeeeeesseeeneeeneees 15 2J 2 Start pri si Snvat ME eich ees 15 2J 3 Gas PreSSUre xii ok ens eee 16 2J 4 Adjustment of Water Pressure Switch 16 2J 5 Water Temperature Rise 17 SECTION 3 Operating Instructions 3A Start Up Procedure nen 18 3B Temperature Controls 18 3B 1 Information Displayed sswwswmmammmasa 19 3B 2 Turning The Heater On Or Off 19 3B 3 Setting Pool And Spa Temperatures And Changing From Fahrenheit To Celcius 19 3B 4 Error Status ii na a eat as 19 3C Lighting and Shutdown 21 3C 1 Lighting the Heater 21 3C 2 SAU WA ua na 21 3D Water Chemistry 21 3D 1 POl Srei esc ees ett aie ee ets 21 3D 2 SPaS eck ein ee a
68. ss or flooding or the damage caused by it Do not install a shutoff valve or any kind of variable restriction in the water piping between the heater outlet and the pool spa Pool systems with water flow rates higher than 125 GPM require an adjustable external bypass at the heater Page 14 Laars 21 3 Connections at Heater The LX and LT have a standard two inch water header and coupling design With this feature only nominal two inch PVC or CPVC may be connected to the heater However by installing the appropriate pipe adapters and two short pieces of two inch plastic pipe supplied by the installer any size existing pipe may be fitted to the heater To connect a section of 2 PVC or CPVC pipe to the heater first slip a coupling nut onto the pipe Then prepare the end of the pipe with the proper PVC CPVC primer and glue Follow the manufacturer s instructions provided with the primer and glue for preparation procedures and curing times Apply the slip fit side of the coupling to the end of the pipe Allow the glue to cure completely Set the o ring into the groove on the face of the coupling Slide the coupling nut up to the coupling and tighten it to the threaded connection on the header see Figure 16 21 4 Pressure Relief Valve A pressure relief valve is mandatory in any installation in which the water flow can be shut off between the heater outlet and the pool spa A pressure relief valve is not supplied with the
69. t in Section 5 of this manual The conversion can be done quite simply as follows 1 Remove the vent exhaust grill by removing the four screws which retain it The grill and the screws may be discarded See Figure 3 2 Replace the grill with the vent collar see section 4 for kit number Place the vent collar and gasket over the hole and fasten it in place with the 4 screws provided Be sure that all components are properly aligned See Figure 4 3 Install the vent pipe on the indoor vent collar The collar will accommodate vent piping of nominal 7 or 9 diameter depending upon the model of your heater See Figure 5 See vent installation section for important information on selecting proper pipe size OUTDOOR VENT GRILL Figure 3 Removal of Outdoor Exhaust Grill Page 4 Laars INDOOR VENT COLLAR GASKET inch of flow area for each 4000 BTU H of heater input If air is provided through horizontal ducts each opening and duct must provide one square inch of flow area for each 2000 BTU H of heater input These requirements are summarized in Table 2 Note that the specified areas are net free area after allowing for the blockage of grill bars etc See applicable codes for details Even though local codes may allow it Waterpik Technologies does not recommend installation in which combustion and ventilation air is provided by infiltration Pool heaters tend to have larger input than
70. tch to the two terminals Use American Wire Gage AWG No 14 gauge stranded copper wire with a temperature rating of 221 F 105 C or greater see Figure 11 LEFT SIDE OF RACEWAY REMOVE JUMPER WIRE TERMINAL BLOCK Figure 10 Remove Jumper from Terminal Block TO LIMIT SWITCHES TO LIMIT SWITCHES FIELD PROVIDED WIRING FACTORY K INSTALLED Se LOW VOLTAGE SWITCH TIME CLOCK FUSIBLE LINK FUSIBLE LINK HEATER WIRING BEFORE MODIFICATION MODIFIED HEATER WIRING WITH TIME CLOCK INSTALLATION Figure 11 Typical Time Clock Wiring INDOORCONTROL Bezel RSCONTROL Y O O o di Le 22 GAGE 4 U1 CONDUCTOR ue WIRE JVA Board oo H cy 1 RED 3 2 BLK 3 YEL s LI 4 GRN els Lf LXCONTROL Figure 12 Wiring a Laars LX to a Jandy RS Remote If your time clock simply interrupts the high voltage power supply or has a high voltage output do not connect the power supply of the heater to the output side of the clock Doing so will prevent the blower from purging the residual heat from the heater when the heater turns off This situation will damage the heater The blower must be allowed to run for 45 seconds after the heater shuts off 2H 4 Remote Operation Model LX Only The Laars LX pool spa he
71. the four wires coming from the indoor controller NOTE Ifyou need to install more than two wires in each terminal order a Waterpik Technologies Jandy Multiplex PCB Kit which includes the Multiplex Board WP J part 6584 Never put more than two wires into each of the pins of the terminal bar 7 On the heater s electronic control board verify that the water temperature sensor is connected J4 and that jumper is in place on WO 8 Check all wiring then apply power to both the heater and the RS control system Operation can be verified in either Service or Auto mode See your RS Control System for instructions about operation When the LX heater is first powered the display on the control will show RS ONLINE If there is an RS control connected to the heater it will sense the RS unit and remain online When the display shows RS ONLINE all functionality of the control on the heater is disabled The heater functions can be controlled only at the RS unit However sensor data is displayed at both the heater and the RS unit To temporarily use the heater controls use a thin object to depress the button marked RS SERVICE The RS ONLINE indicator will disappear from the heater display All functionality has now been returned to the control on the heater In this mode the RS unit has been disabled To return the functionality to the RS unit push the button again An interrupt on off type remote can be connected by remov
72. tions In either case location must be selected with consideration of vent gas exhaust and in the case of indoor installation the location must have suitable provisions for combustion and ventilation air Avoid placing the heater in locations where it can cause damage by water leakage If this is not possible provide a suitable drain pan to catch and divert any leakage The pan must not block natural flow of air to or around the heater When a heater or any system component is located below the pool surface a leak can result in large scale water loss or flooding Waterpik Technologies cannot be responsible for such water loss or flooding Location of a heater below or above the pool surface affects operation of the heater pressure switch See sections on water piping and heater start up for more information about this 4A CAUTION When pool equipment is located below the pool surface a leak from any component can cause large scale water loss or flooding Waterpik Technologies cannot be responsible for such water loss or flooding or resulting damage NOTE See Outdoor Installation section regarding roof overhang These clearances are the minimum acceptable Whenever possible larger clearances should be provided to assure adequate room for service operations Note that gas piping may be provided through either side of the unit See later section on gas piping Do not install the heater on carpeting or similar material 2C 3 F
73. ts 250 400 R0326603 05 47 Wire Harness Power Transformer All R0330900 3 Heat Exchanger Baffles 48 Wire Harness Ignition Control All R0331000 Set of ten including end baffles 250 400 R0334403 05 49 Wire Harness Gas Valve All R0331100 4 Front Header w Hardware 8 Gaskets All R0326900 50 Wire Harness Safety Loop All R0331200 5 Rear Header w Hardware 8 Gaskets All R0327000 51 Wire Harness 120 Volt Power Plug All R0336200 6 By Pass Assy w Hardware amp Gaskets All R0327100 51 Wire Harness 240 Volt Power Plug All R0336300 7 Gasket Bypass Assy All R0336700 52 Wire Harness 15 Pin Connector All R0336400 8 Spring Bypass Al R0327200 53 Terminal Block for Fireman s Switch All R0097800 9 Coupling Nut Kit w Compression Ring and Gasket 54 Temperature ControlW Bezel LX All R0329600 Set of two AI R0327300 54 Temperature Control W Bezel LT All R0350500 10 Compression Ring w Gasket I O Header 55 FlameSenseRod All R0334800 Set of two sali R0327400 56 Fusible Link All R0012200 11 Gasket Header front or rear All R0327500 12 Header Drain Plug w gasket Set of 3 All R0335900 ko i 13 Heat Exch Hardware Kit 8 Gaskets All R0327600 ZIPA WANA acketAssy Sera S RIM Gas Components 58 Door Latch Assembly w Handle All R0334900 14 Burner Tray Weldment 250 400 R0327703 05 59 Cover Panel Raceway 250 400 R0335103 05 15 Burners Ea All L0052300 60 Panel Side Lower fits left or right All R0330100 16 Manifold Gas 250 400 PR0327803 05 61
74. ty system which allows operation in a variety of conditions and prevents operation when certain adverse conditions are encountered The heater is capable of diagnosing problems within the safety controls scheme enabling faster service and less down time in the event of a failure When the heater is powered water is flowing through the heater and the water temperature entering the heater is below the temprature control setting the heater is ready to ignite The combustion fan is powered and if airflow is proved adequate the igniter comes on 45 seconds into the call for heat At 60 seconds into the call for heat the gas valve opens and gas flows to the burners If ignition is unsuccessful or if the flame fails during normal operation the ignition control shuts off the gas valve It imposes a post purge and two more ignition cycles and it shuts down the system if ignition is not achieved in three cycles To reset the model LX for another three cycles press and release the mode button until the indicator on the LCD screen aligns with OFF Now press and release the button again until the indicator on the LCD screen aligns with the desired setting either POOL or SPA To reset the model LT press and release the mode button until the indicator lights for the SPA and POOL settings are off Then press and release it again until the indicator light for the desired setting is back on Page 16 Laars A CAUTION Do not op

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