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- Jandy
- Water Heater
- -Low NOx
- Installation And Operation Manual
Jandy -Low NOx Installation And Operation Manual
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.
H0256100E
Installation and Operating Data
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.
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.
Model
LX250-L
Shown
Summary of -Low NOx
Page 1
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...
Page 2
Table of contents section 1. General information 1.1 introduction ................................................. 1 1.2 consumer information and safety ................ 1 1.2.1 spa/hot tub safety rules ........................... 1 1.2.2 swimming pool energy safety tips ............. 2 1.3 warrant...
Page 3
Lx and lt low nox pool/spa heater page 1 section 1. General information 1.1 introduction this manual provides installation and operation instructions for the lx and lt low nox pool and spa heaters. Read these installation and operation instructions completely before proceeding with the installation....
Page 4
Page 2 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: • lack ...
Page 5
Lx and lt low nox pool/spa heater page 3 any changes to the heater, gas controls, gas orifices, wiring, draft diverter, or improper installation may void the warranty. If change is required to any of the above, consult the factory. 1.5 technical assistance consult waterpik technologies or your local...
Page 6
Page 4 high altitudes are available from your jandy pool products dealer or by contacting the customer service department at 707.776.8200 extension 245. See section 11, "parts list", of this manual for the correct kit number for the manifold assembly needed for your altitude. Table 1 defines the alt...
Page 7
Lx and lt low nox pool/spa heater page 5 section 2. Installation instructions 2.1 introduction warning improper installation or maintenance can cause nausea or asphyxiation from carbon monoxide in flue gases which could result in severe injury, or death. For indoor installations, as an additional me...
Page 8
Page 6 similar structure, all burners and burner ignition devices must have a minimum 18" (457mm) clearance above the floor. This heater must be installed at least 5 feet (1.52m) from the inside wall of a pool unless the heater is separated from the pool by a solid fence, wall or other permanent sol...
Page 9
Lx and lt low nox pool/spa heater page 7 utility room). In the united states there must be a minimum of four (4) feet (1.22 m) horizontally and four (4) feet (1.22 m) vertically between the heater exhaust point and any door, glass opening, or gravity inlet to a building. In canada, the heater must b...
Page 10
Page 8 une remise extérieure (au canada seulement) est un endroit inoccupé qui ne communique pas directement avec les endroits occupés. Toutes les installations intérieures et remises extérieures exigent l’addition d’une cheminée approuvée par le manufacturier. La cheminée doit être installée sans a...
Page 11
Lx and lt low nox pool/spa heater page 9 the information in table 3 is not applicable in installations where exhaust fans or blowers of any type are used. Such installations must be designed by qualified engineers. The heater must be completely isolated and protected from any source of corrosive che...
Page 12
Page 10 warning vent pipe diameter must be as required by the national fuel gas code z223.1 or the canadian installation codes for gas appliances can/ csa-b149.1. Undersize pipe can result in inadequate venting and oversize pipe can result in vent condensation. In either case the result can be relea...
Page 13
Lx and lt low nox pool/spa heater page 11 correct part number of the manifold kit needed. When changing the altitude range of the heater, be sure to fill out the altitude conversion label, included in the kit. Apply the label on the inner panel of the heater, next to the original rating plate. Cauti...
Page 14
Page 12 5. Install a manual gas shutoff valve for service and safety. Do not use a restrictive gas cock. Do not use flexible gas piping, it will restrict the gas flow to the heater. 6. Disconnect the heater and its individual shutoff valve from the gas supply system during pressure testing of the sy...
Page 15
Lx and lt low nox pool/spa heater page 13 4.3 special precautions for lp gas lp gas is heavier than air and can therefore more readily collect or “pool” in enclosed areas if provision for proper ventilation is not made. Installation of pool heaters in enclosed areas such as pits is not recommended. ...
Page 16
Page 14 1. For an existing installation, drain the heater by removing the drain plug on the inlet/outlet header and the two drain plugs on the return header. 2. Remove the heater front panel (door). 3. Remove the two hex head screws that hold the raceway cover in place. They are located on the botto...
Page 17
Lx and lt low nox pool/spa heater page 15 8. 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 flue collector. 9. Disconnect the high limi...
Page 18
Page 16 27. Route the 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. 28. Route the wires that attach to the temperature sensor along the copper siphon loop, back to the right side of the heater...
Page 19
Lx and lt low nox pool/spa heater page 17 5.6 pressure relief valve a pressure relief valve (prv) is recommended in all installations, and 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...
Page 20
Page 18 12. Wrap the threads of the adapter with a suitable teflon thread tape. 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 ...
Page 21
Lx and lt low nox pool/spa heater page 19 figure 18. Lx and lt low nox connections/schematic wiring diagram.
Page 22
Page 20 caution do not provide power to the heater from the high voltage side of a time clock or pump relay. Doing so may cause damage to the heater or surrounding plumbing. Attention n’installez pas l’alimentation électrique de l’appareil du côté haute tension d’un relais d’horodateur ou de pompe. ...
Page 23
Lx and lt low nox pool/spa heater page 21 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 wi...
Page 24
Page 22 to connect the lx low nox to your rs control system, follow the steps listed below (see fig. 24). 1. Turn off the power to both the heater and the rs control. 2 open the rs power center enclosure and remove the front dead panel. Note: only a revision "i", or higher, program chip in the rs sy...
Page 25
Lx and lt low nox pool/spa heater page 23 avertissement pour votre sécurité personnelle lorsque vous mettez l’appareil en marche, tenez votre tête et votre visage loin du brûleur pour éviter tout risque de blessure. Warning vent pipes, and heater tops get hot! These surfaces can cause serious burns....
Page 26
Page 24 caution keep all objects off the top of the heater. Blocking air flow could damage the heater, and may void the warranty. Attention ne posez aucun objet sur le dessus de l’appareil. Il pourrait empêcher la circulation de l’air, ce qui risquerait d’endommager l’appareil et d’annuler la garant...
Page 27
Lx and lt low nox pool/spa heater page 25 figure 25. Temperature control panel a) the lx control panel display laars laars pool/off/spa backlight rs service on line for operation with controller aqualink rs tm laars pool off spa heating service * *service diagnostics-see inside front door f°/c° sele...
Page 28
Page 26 7.3.3 setting pool and spa temperatures, changing from fahrenheit to celsius the model lx heater displays temperature in fahrenheit units when powered-up. To switch to celsius, first turn the heater to the "off" mode, then press the ‘f°/c°’ button. Once the desired tempera- ture units are se...
Page 29: Operating Instructions
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. Operating instructions 10. Turn on all electric power to appliance. 11. ...
Page 30
Page 28 7.5 adjusting the water pressure switch caution the water 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. Adjust the switch to turn the heater off, not on. Attention le manocontact de p...
Page 31
Lx and lt low nox pool/spa heater page 29 7.6 temperature rise the lx and lt low nox pool and spa heaters have an internal bypass 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 bypas...
Page 32
Page 30 section 8. Maintenance 8.1 water chemistry the mineral content of swimming pool water increases daily due to natural evaporation and the addition of sanitizing chemicals. If the mineral concen- tration in the pool gets too high, the excess minerals will deposit on the walls of the pool, in t...
Page 33
Lx and lt low nox pool/spa heater page 31 8.2.3 spring start-up to restart the heater in the spring, have a qualified professional technician reassemble the heater as follows: 1. Fill the siphon loop with approximately 5cc of sae 50, non-detergent oil. Attach the copper tubing to the pressure switch...
Page 34
Page 32 5. If the heater is equipped with a pressure relief valve, check for corrosion in and around the valve. Twice a year, with the filter pump on, lift the release lever on the top of the valve to make sure that water runs freely through it. If corro- sion is found, replace the pressure relief v...
Page 35
Lx and lt low nox pool/spa heater page 33 9.2 service codes the lx and lt low nox controllers monitor several functions of the heater. 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 displ...
Page 36
Page 34 lx/lt t roubleshooting g uide # symptom cause remedy 1. Pump not a. No power a. Check circuit breakers and power source. Operating b. Pump defective b. Replace. C. Incorrectly wired c. Recheck wiring. D. Time clock settings not d. Check time clock setting. Synchronized with actual time 2. Fl...
Page 37
Lx and lt low nox pool/spa heater page 35 lx/lt h eater s ervice d iagnostic g uide d isplay c ode c ause r emedy low press * (pressure switch) 1. Pump is not running. 1. This is a normal display when the pump is off. No service required. 2. Low pump pressure. 2. Clean filter or clear blockage/check...
Page 38
Page 36 section 10. Professional maintenance and service warning servicing safety some of the servicing procedures for the lx and lt low nox heaters are hazardous because they involve fuel gas, electricity, moving parts and procedures which require testing or temporary bypass of safety controls. For...
Page 39
Lx and lt low nox pool/spa heater page 37 the system operates with a balanced combina- tion of natural and induced draft. Air and gas are pulled into the burner venturis where they are mixed and conveyed to the combustion chamber. The combustion process produces heat and creates a negative pressure ...
Page 40
Page 38 before making a damper adjustment, run the heater for ten or fifteen minutes to assure steady operation and measure the flame signal. Adjust the damper to provide a signal of five to seven µamps. A higher signal indicates a "low" flame that produces excessive nox and may cause burner failure...
Page 41
Lx and lt low nox pool/spa heater page 39 these procedures require a volt-ohm meter with a minimum 0-250vac voltage range, and 1-1000 ohm resistance range. Figure 39 shows the power and control circuits and where to take measurements. Location numbers in circles have been added, and will be referenc...
Page 42
Page 40 10.5.3.1 transformer attach the black lead of the voltmeter to the terminal on the secondary side of transformer with a yellow wire attached to it (common). This is test point 1 on figure 39. Touch the free lead of the voltmeter to the terminal on the secondary side of transformer with a red...
Page 43
Lx and lt low nox pool/spa heater page 41 over-firing, or to a problem with the water piping or the heater's internal bypass control. Over-firing might be a result of an incorrect gas orifice or supply of propane gas to a heater intended for natural gas. If there are no such fundamental problems, id...
Page 44
Page 42 not 20-28 volts at this point, either the controller or the ten-pin wire harness is faulty and must be replaced. If 20-28 volts is detected at this point, then move the red lead of the meter to test point 24 where the black wire with a yellow trace from the blower pressure switch enters the ...
Page 45
Lx and lt low nox pool/spa heater page 43 check the igniter with the ohmmeter. Disconnect the igniter wires at the quick disconnects. Place one lead of the meter on each wire of the igniter. The resistance should read between 40 and 75 ohms at ambient air temperature. If the meter reads outside of t...
Page 46
Page 44 figure 39 . Test point identification diagram.
Page 47
Lx and lt low nox pool/spa heater page 45.
Page 48
Page 46 contact with the pin on the power distribution board that is labeled "l2" where the red wire is connected (test point n). No voltage at this point means that the power distribution circuit board has shorted and needs to be replaced. If the voltage is correct, move the red lead to the connect...
Page 49
Lx and lt low nox pool/spa heater page 47 11.2 parts list key model order no. Description no. Part no: water components 1 complete heat exchanger (copper) 250,400 r0326303,05 2 tube assy.(cu), w/hdwr & gskts 250,400 r0326603,05 3 heat exchanger baffles (set of ten including end baffles) 250,400 r033...
Page 50
Page 48 11.3 general exploded view 1 (see next page for details) 5 (see next page for details) 8 9 14 (see next page for details) 18 19 20 21 43 34 35 36 69 53 51 22 23 52 70 67 56 55 60 62 64 61 59 58 66 65 63 60 68 71 57 28,37 (see next page for details) 54 75 (see next page for details).
Page 51
Lx and lt low nox pool/spa heater page 49 11.4 detailed exploded view 33 25 27 35 49 50 42 17 15 16 32 31 28 30 29 10 11 3 2 11 12 38 41 40 41 39 4 75 6 7 5.
Page 52: Limited Warranty
Limited warranty thank you for purchasing jandy® pool and spa products. Waterpik technologies (manufacturer of jandy prod- ucts) 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 excepti...