Jandy LXi : installation and operation manual - Piscines et Spas ...

LXi Pool/Spa Heater Installation and Operation Manual Page 177. If the gas supply pressure is less than required,check for undersized pipe between the meter andthe heater, a restrictive fitting, or an undersizedgas meter. Gas supply pressures to the heater arelisted in Table 6.Table 6. Gas Supply Pressure Requirements*Supply Pressure Minimum MaximumNatural Gas 5.0 inches W.C.(1.2 kPa)10.5 inches W.C.(2.6 kPa)LP GasManifold PressureNatural GasLP Gas11.0 inches W.C.(2.5 kPa)14.0 inches W.C.(3.5 kPa)Nominal2.5 inches W.C. (0.6 kPa)9.0 inches W.C. (2.2 kPa)NOTE The maximum inlet gas pressure must notexceed the specifi ed value. The minimum valuelisted is for the purpose of input adjustment. Referto Table 6.8. To connect the gas supply line to the heater’s gasvalve, make sure the steel elbow (supplied withthe manifold) is screwed into the inlet side of thegas valve. The heater is designed so that the gassupply line may enter through either side of theheater. Tighten the elbow until the desired orientationis achieved.CAUTIONDo not overtighten the elbow. Over tightening willcrack the gas valve. Do not use tefl on tape to wrapthe elbow threads.ATTENTIONNe serrez pas trop le coude. Vous risqueriez de fi s-surer la soupape de gaz. N’entourez pas le fi letagedes coudes de ruban à joints.9. Before operating the heater, test the complete gassupply system and all connections for leaks usinga soap solution. Do not use an open flame.CAUTIONSome leak test solutions (including soap and water)may cause corrosion or stress cracking. Rinse thepiping with water after testing.ATTENTIONCertaines solutions d’essai d’étanchéité (y comprisl’eau et le savon) peuvent causer de la corrosionou de la fi ssuration. Rincez les tuyaux à l’eau aprèsl’essai d’étanchéité.4.2 Manifold PressureConfirm that gas supply pressure is correct. Ifthe gas supply pressure is less than required, checkfor undersized pipe between the meter and the heater,a restrictive fitting, or an undersized gas meter. Gassupply pressures to the heater, when it is operating, arelisted in Table 6.CAUTIONManifold gas pressure for the LXi natural gas heatersshould be set at 2.5" WC. Propane heatersshould be set to 9" WC.ATTENTIONLa pression du collecteur de pression pour lessystèmes de chauffage au gaz naturel devrait êtrede 2.5'’ WC. Pour les sytèmes de chauffage au gazpropane devrait être de 9'’ WC.The manifold pressure may be checked by connectinga manometer to the pressure port on the outletside of the valve. The pressure will be zero when theheater is not running. When the heater is operating themanifold gas pressure should be 2.5" WC for naturalgas heaters and 9.0" WC for LP gas heaters.If the manifold pressure indicated above is notcorrect, check the gas train for possible problems.Check the meter, gas line, gas fittings, and gas shut offfor under sizing. Check the gas valve inlet for excesspipe dope, if all is correct, then it may be necessary toadjust the gas valve regulator. To adjust the manifoldgas pressure, first remove the slotted cap next to theinlet pressure port on the inlet side of the gas valve.Under the slotted cap is a slotted plastic screw whichincreases the manifold pressure when turned clockwiseand decreases the manifold pressure when turnedcounterclockwise. After measurements, and adjustmentsif necessary, have been made, make sure toreplace the 1/8" NPT gas valve plugs on the inlet andmanifold pressure ports, and the cap on the manifoldpressure adjustment screw. It is extremely importantto replace these parts before leaving the installation.Failure to do so can result in damage to property or injuryor death. With the heater fi ring, the pressure mustbe within the range shown in Table 6. Also check thepressure with the heater off.4.3 Special Precautions for LP GasLP Gas is heavier than air and can therefore morereadily collect or “pool” in enclosed areas if provisionfor proper ventilation is not made. Installation of poolheaters in enclosed areas such as pits is not recommended.However, if such an installation is requiredbe sure to pay special attention to proper ventilationrequirements for LP gas. Locate heaters a safe distancefrom LP gas cylinders and filling equipment.Consult the National Fuel Gas Code (NFPA 54 / ANSIZ223.1, latest edition), the Natural Gas and PropaneInstallation Code in Canada (CAN/CSA B149.1, latestedition), and any other local codes and fire protectionauthorities about specific installation restrictions inyour area.