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Installation and Operating Data
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. For indoor installations, as an additional measure of safety, Waterpik
Technologies strongly recommends installation of suitable Carbon Monoxide detectors in
the vicinity of this appliance and in any adjacent occupied spaces. Improper installation
and/or operation will void the warranty.
Installation and
Operation Manual
®
LX
and
®
LT
Low NOx*
Gas-Fired Pool
and Spa Heater
Model LX/LT-Low NOx*
Natural Gas and LP
*Only models using natural gas are certified
as meeting low NOx emissions requirements.
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.
• 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.
WARNING
WHAT TO DO IF YOU SMELL GAS
Model
LX250-L
Shown
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Summary of Contents for Jandy LX
- Page 1 Gas-Fired Pool and Spa Heater Model LX250-L Shown Model LX/LT-Low NOx* Natural Gas and LP *Only models using natural gas are certified as meeting low NOx emissions requirements. WARNING If these instructions are not followed exactly, a fire or explosion may result, causing property damage, personal injury, or death.
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Page 2: Table Of Contents
TABLE OF CONTENTS SECTION 1. General Information SECTION 7. Operating Instructions Introduction ..........1 Normal Operation ........23 Consumer Information and Safety ....1 Start-Up ............ 23 1.2.1 Spa/Hot Tub Safety Rules ......1 Temperature Controls ........ 24 1.2.2 Swimming Pool Energy Safety Tips ..... 2 7.3.1 Information Displayed ........ -
Page 3: Section 1. General Information
Consommateurs, devraient être This manual provides installation and operation respectés lors de l’utilisation du spa. instructions for the LX and LT Low NOx pool and spa heaters. Read these installation and operation WARNING instructions completely before proceeding with the The U.S. -
Page 4: Swimming Pool Energy Safety Tips
The effects of hyperthermia include: 1.3 Warranty The LX and LT Low NOx heaters are sold with • Lack of awareness of impending hazard a limited factory warranty. Details are specified on the back cover of this manual. -
Page 5: Technical Assistance
Natural Gas: 3/4" NPT The following items are needed and are to be 3/4" NPT supplied by the installer for all LX/LT Low NOx heater installations: For diameter of gas line from meter to heater see Table 5 in Section 4.1. -
Page 6: Dimensions
BTU/HR (kcal) 250-L 28 1/4 (72) 27 1/8 (69) 30 7/8 (78) (18) 250,000 400-L 34 1/4 (87) 27 1/8 (69) 30 7/8 (78) (23) 400,000 * Values shown are for both LX and LT models. Figure 1. General Configuration... -
Page 7: Section 2. Installation Instructions
(see Table 2). ured for an outdoor installation. The LX and LT Low At least 18" (457mm) access must be available in NOx heaters are also design certified for "Indoor"... -
Page 8: Flooring
Jandy, is used. See the heater rating plate or the the masonry (see Figure 2). If the heater is installed in Parts List (Section 11) of this manual for the appropri- a carpeted alcove, the entire floor of the alcove must ate base part number. -
Page 9: Indoor And Outdoor Shelter Installation
LX and LT Low NOx Pool/Spa Heater Page 7 utility room). In the United States there must be a Ne pas installer ce chauffe-piscine sous une minimum of four (4) feet (1.22 m) horizontally and saillie mesurant moins de 3 pi de hauteur. La partie four (4) feet (1.22 m) vertically between the heater... -
Page 10: Converting The Grill To A Vent Collar
Une remise extérieure (au Canada seulement) Collar est un endroit inoccupé qui ne communique pas If the LX or LT Low NOx is to be installed directement avec les endroits occupés. Toutes les either indoors or in an outdoor shelter, its exhaust installations intérieures et remises extérieures exigent... -
Page 11: Exhaust Venting
3.2 Exhaust Venting When converted to indoor and outdoor shelter Note: In Canada, follow Canadian Standard, venting configuration, the LX and LT Low NOx CAN/CSA-B149.1 or local codes. heaters have a vent collar fitting. The diameter of the vent collar and, thus, the minimum diameter of the vent... -
Page 12: Vent Pipe Sizing And General Installation
Installation The vent collar outlet is to be connected to an As part of their certification, the LX and LT Low unobstructed vent pipe of the same diameter, terminat- NOx heaters have been determined to be a Category 1 ing outside the building. -
Page 13: Inspection And Replacement Of Existing Vent System With New Components
Components included in the kit. Apply the label on the inner If the LX/LT is being installed to replace an panel of the heater, next to the original rating existing pool heater, it is recommended that a new plate. -
Page 14: Manifold Pressure
Natural Gas 5.0 Inches WC 10.5 Inches WC (1.2 kPa) (2.6 kPa) CAUTION Manifold gas pressure for the LX and LT Low LP Gas 11.0 Inches WC 14.0 Inches WC NOx natural gas heaters should be set at 3" (2.5 kPa) (3.5 kPa) -
Page 15: Special Precautions For Propane Gas
Figure 10 illustrates typical piping for pool 5.3 Automatic Flow Control Valve equipment in pool/spa combination pools. With its electronic control, the LX and LT Low NOx heaters The inlet/outlet header of the LX and LT Low are particularly suited for this type of pool installation. -
Page 16: Reversible Water Connections
5.4 Reversible Water Connections removing the drain plug on the inlet/outlet header The LX and LT Low NOx heaters are shipped and the two drain plugs on the return header. with water connections on the right side, but they can be modified in the field to provide left-side water Remove the heater front panel (door). - Page 17 LX and LT Low NOx Pool/Spa Heater Page 15 Clip the wire tie that bundles the wire harnesses 22. Place the return header over the gasket on the leading from the control panel. Disconnect the right side of the tube assembly and align the holes two black temperature sensor wires from the in the header with the holes in the header bar.
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Page 18: Connections At Heater
5.5 Connections at Heater corner posts on the left side of the heater. Push it The LX and LT Low NOx heaters have a down until the tabs on the panel lock into the top standard two (2) inch water header and coupling of the corner posts. -
Page 19: Pressure Relief Valve
THEN OPEN HOLE WITH THREADS A 3/8" BIT THEN OPEN LX and LT Low NOx heaters. However, it is recom- HOLE WITH A 1/2" BIT mended that a pressure relief valve be installed and may even be required by local codes. Be sure to check any applicable installation codes in your area to determine whether a pressure relief valve is required. -
Page 20: Auxiliary Components, Chlorinators, Ozone Generators, And Sanitizing Chemicals
Ozone Generators, and Sanitizing Chemicals 6.1 General Information The LX and LT Low NOx heaters are manufac- Wiring connections must be made exactly as tured with materials that are not compatible with high shown in the wiring diagram found on the inside of the concentrations of ozone, chlorine, bromine, or other heater door (see Figure 18). - Page 21 LX and LT Low NOx Pool/Spa Heater Page 19 Figure 18. LX and LT Low NOx Connections/Schematic Wiring Diagram...
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Page 22: Converting The Heater For A 115V Power Source
Figure 19. Field Wiring Connections Cut the plastic wire tie that is holding the voltage To wire the LX and LT Low NOx heater to a selector board in place and discard the wire tie. 115V or 230V /60 Hertz (Hz) electrical source: Unplug the voltage selector board from the receptacle (see Figure 21). -
Page 23: Auxiliary Time Clock Wiring
RS Control Systems will permit the heater to be heater circuit, follow these instructions (see Figure 22): operated by remote control. If you are setting up a new pool or spa system, call your local Jandy distribu- Remove heater door. tor or the Customer Service Department for informa-... - Page 24 RS unit and remain online. If an RS system To connect the LX Low NOx to your RS control is not connected to the LX Low NOx heater via the system, follow the steps listed below (See Fig. 24).
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Page 25: Section 7. Operating Instructions
To reset the model LX Low NOx for another ATTENTION three cycles, press and release the mode button until the indicator on the LCD screen aligns with "OFF". -
Page 26: Temperature Controls
émises. Cette limit is not satisfied. The Model LX displays this période de combustion ne durera que quelques information on the left side of the LCD under the LX minutes. logo. When the gas heater is firing, the LCD displays... -
Page 27: Turning The Heater On Or Off
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. -
Page 28: Setting Pool And Spa Temperatures, Changing From Fahrenheit To Celsius
Page 26 7.3.3 Setting Pool and Spa Before starting your heater, be sure that all of the functions and limits of the LX and LT controllers have Temperatures, Changing from been set according to the previous section of this Fahrenheit to Celsius manual (Section 7.3). - Page 29 LX and LT Low NOx Pool/Spa Heater Page 27 FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or loss of life. A. This appliance does not have a pilot light.
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Page 30: Adjusting The Water Pressure Switch
15 feet (4.57 m) below or 6 feet (1.83 m) above the pool surface. Consult your local Jandy representative for recommendations. On some installations, the piping from the heater to the pool is very short. The back pressure could be too low to trigger the pressure switch. -
Page 31: Temperature Rise
LX and LT Low NOx Pool/Spa Heater Page 29 7.6 Temperature Rise The LX and LT Low NOx pool and spa heaters BYPASS have an internal bypass which accommodates a wide ADJUSTMENT range of water flow. The bypass is easily adjustable to... -
Page 32: Section 8. Maintenance
This chemical imbalance can result in unsani- peratures to 70°F (21°C) on the LX or the lowest tary water conditions, and affect the life of the heater. setting possible on the LT. See Section 7.3.3. This... -
Page 33: Spring Start-Up
LX and LT Low NOx Pool/Spa Heater Page 31 8.3 Inspection and Service The LX and LT Low NOx heaters are designed and constructed to provide long performance life when installed and operated properly under normal condi- tions. Periodic inspections, especially at spring start- up, are important to keep your heater running safely and efficiently through the years. -
Page 34: Professional Inspection
Be aware that premix combustion systems of the For your safety, when starting the heater, keep type found in the LX and LT heaters have special your head and face away from the burner area characteristics that affect operation and troubleshoot- opening to prevent any risk of personal injury. -
Page 35: Service Codes
In the event of a malfunction, the LX controller will display a service code on the left side of the LCD screen under the LX logo (see Figure 34). The model LT displays this information by lighting a set of indicator lights located on the front of the control panel (see Figure 35). - Page 36 Page 34 Table 10. LX/LT T ROUBLESHOOTING UIDE Symptom Cause Remedy Pump not A. No power Check circuit breakers and power source. operating B. Pump defective Replace. C. Incorrectly wired C. Recheck wiring. D. Time clock settings not D. Check time clock setting.
- Page 37 LX and LT Low NOx Pool/Spa Heater Page 35 LX/LT H Table 11. EATER ERVICE IAGNOSTIC UIDE ISPLAY AUSE EMEDY 1. Pump is not running. LOW PRESS * 1. This is a normal display when the pump is OFF. No Service Required.
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Page 38: Section 10. Professional Maintenance And Service
SECTION 10. 10.1 General Information A qualified professional technician must service Professional Maintenance and the LX and LT Low NOx pool heaters using Jandy's Service service procedures. Before calling for service, how- ever, the owner should check for obvious problems. -
Page 39: Special Service Issues Premix Combustion System
LX and LT Low NOx Pool/Spa Heater Page 37 The system operates with a balanced combina- rent. If flame current is less than 0.7 µamps the tion of natural and induced draft. Air and gas are ignition control shuts down the system. Normally the pulled into the burner venturis where they are mixed signal is five to seven µamps. -
Page 40: Heater Components And Their Operation
It shuts off the heater if air flow is inadequate. Temperature Control - Both the LX and LT Low NOx heater models are equipped with an Flame Sensor - The flame sensor is the elec-... -
Page 41: Electrical Power Supply
POINTS D and E 98 - 126 Volts 10.5.1 Electrical Power Supply The electrical components of the LX and LT D and F 98 - 126 Volts 98 - 126 Volts Low NOx pool heaters are designed to operate with... -
Page 42: Transformer
Page 40 and the water pressure switch is good. If there is no 10.5.3.1 Transformer voltage at test point 7, look for a loose connection or Attach the black lead of the voltmeter to the replace the ten-pin wire harness. If there is voltage at terminal on the secondary side of transformer with a test point 7 then move the lead from test point 7 to the yellow wire attached to it (common). -
Page 43: Blower Pressure Switch Circuit
LX and LT Low NOx Pool/Spa Heater Page 41 If there is no voltage, either the fusible link or the over-firing, or to a problem with the water piping or the heater's internal bypass control. Over-firing might contacts of the manual reset switch are open. To... -
Page 44: Gas Valve Voltage
Page 42 not 20-28 Volts at this point, either the controller or the 10.5.3.8 Igniter/Ignition Control Circuit ten-pin wire harness is faulty and must be replaced. If 20-28 Volts is detected at this point, then move the red WARNING lead of the meter to test point 24 where the black wire The igniter, power supply circuit board and with a yellow trace from the blower pressure switch enters the ten-pin connector. - Page 45 LX and LT Low NOx Pool/Spa Heater Page 43 Check the igniter with the ohmmeter. Disconnect replaced. If the voltage is correct, move the red lead the igniter wires at the quick disconnects. Place one to the connection at the igniter wire quick disconnect lead of the meter on each wire of the igniter.
- Page 46 Page 44 Figure 39 . Test Point Identification Diagram...
- Page 47 LX and LT Low NOx Pool/Spa Heater Page 45...
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Page 48: Section 11. Replacement Parts
Check the connections or replace the power distribu- tion board. AquaLink® and Jandy® are trademarks of Jandy Industries, Inc. LT® and LX® are trademarks of Waterpik Technologies, Inc. All other brand names, products names or trademarks belong to their respective holders. -
Page 49: Parts List
LX and LT Low NOx Pool/Spa Heater Page 47 11.2 Parts List Model Order Model Order Description Part No: Description Part No: Electrical (Continued) Water Components 37 High Limits Set R0023200 Complete Heat Exchanger (Copper) 250,400 R0326303,05 High Limit 135°F R0022700 Tube Assy.(Cu), w/Hdwr &... -
Page 50: General Exploded View
Page 48 11.3 General Exploded View (SEE NEXT PAGE FOR DETAILS) (SEE NEXT PAGE FOR DETAILS) (SEE NEXT PAGE FOR DETAILS) 28,37 (SEE NEXT PAGE FOR DETAILS) (SEE NEXT PAGE FOR DETAILS) -
Page 51: Detailed Exploded View
LX and LT Low NOx Pool/Spa Heater Page 49 11.4 Detailed Exploded View... -
Page 52: Limited Warranty
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 depart- ment 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.
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need bolt tightening order for rear header return LXR heater