Warning for your safety - this product must be installed and serviced by a contractor who is licensed and qualifi ed in pool equipment by the jurisdiction in which the product will be installed where such state or local requirements exists. In the event no such state or local requirement exists, the...
Page 3 legacy ™ model lrzm pool/spa heater installation and operation manual section 1. General information .............. 5 1.1 introduction ..............................................5 1.2 consumer information and safety ...........5 1.2.1 spa/hot tub safety rules ..........5 1.2.2 swimming poo...
Page 4 legacy ™ model lrzm pool/spa heater installation and operation manual section 10. Professional maintenance and service ........................... 33 10.1 general information .................................33 10.2 natural-draft combustion system ...........33 10.3 heater components and thei...
Page 5 legacy ™ model lrzm pool/spa heater installation and operation manual section 1. General information 1.1 introduction this manual provides installation and operation instructions for the legacy model lrz millivolt pool and spa heater. Read these installation and opera- tion instructions compl...
Page 6 legacy ™ model lrzm pool/spa heater installation and operation manual • failure to perceive heat • failure to recognize need to leave spa • physical inability to leave spa • fetal damage in pregnant women • unconsciousness resulting in a danger of drowning 1.2.2 swimming pool energy saving ti...
Page 7 legacy ™ model lrzm pool/spa heater installation and operation manual 1.6 materials installer must provide 1.6.1 materials for all applications the following items are needed and are to be supplied by the installer for all legacy heater installa- tions: 1. The correct size gas pipe to supply ...
Page 8 legacy ™ model lrzm pool/spa heater installation and operation manual able from your jandy dealer or by contacting the customer service department at (800) 822-7933. See section 11, “parts list”, of this manual for the correct kit number for the manifold assem- bly needed for your altitude. T...
Page 9 legacy ™ model lrzm pool/spa heater installation and operation manual the legacy heater may be installed indoors or outdoors as outlined in later sections. Location of the heater below or above the pool water level affects operation of its water pressure switch. See sections on water piping a...
Page 10 legacy ™ model lrzm pool/spa heater installation and operation manual 2.3.3 flooring the heater must be installed on a level surface of noncombustible construction or on fi re-resistant slabs or arches. Noncombustible fl ooring is defi ned as fl ooring material and surface fi nish not capabl...
Page 11 legacy ™ model lrzm pool/spa heater installation and operation manual warning united states do not install the heater with the top of the vent as- sembly within 4 feet (1.22 m) horizontally and 4 feet (1.22 m) vertically of any opening into a building. Canada do not install the heater with t...
Page 12 legacy ™ model lrzm pool/spa heater installation and operation manual and combustion air are essential for the safe and effi cient operation of the heater (see section 3). An approved draft hood may be purchased from your local jandy distributor. See section 11 (parts list) of this manual fo...
Page 13 legacy ™ model lrzm pool/spa heater installation and operation manual 3.2.2 indoor and outdoor shelter installations warning vent pipe diameter must be as required by the na- tional fuel gas code ansi z223.1 or the canadian installation codes for gas appliances can/csa- b149.1. Undersize pip...
Page 14 legacy ™ model lrzm pool/spa heater installation and operation manual heater draft hood. The draft hood and heater top must be easily removable for normal heater service and inspection. The draft hood outlet is to be connected to an unobstructed vent pipe of the same diameter, termi- nating ...
Page 15 legacy ™ model lrzm pool/spa heater installation and operation manual 7. If the gas supply pressure is less than required, check for undersized pipe between the meter and the heater, a restrictive fi tting, or an undersized gas meter. Gas supply pressures to the heater are listed in table 5....
Page 16 legacy ™ model lrzm pool/spa heater installation and operation manual slotted cap is a slotted plastic screw which increases the manifold pressure when turned clockwise and decreases the manifold pressure when turned counter- clockwise. After measurements, and adjustments if neces- sary, hav...
Page 17 legacy ™ model lrzm pool/spa heater installation and operation manual 5.2 check valve installation the heater must be protected from back-siphon- ing 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 fi lter pum...
Page 18 legacy ™ model lrzm pool/spa heater installation and operation manual 15. Thread on the ten (10) bolts and washers and hand tighten. 16. Use a torque wrench to tighten the bolts on each header to four (4) foot-pounds. The bolts must be tightened in the sequence indicated in figure 11. Cautio...
Page 19 legacy ™ model lrzm pool/spa heater installation and operation manual caution in order to prevent property damage or injury, be sure that none of the wires are in contact with a sharp edge or a hot surface. Attention afi n d'empêcher des dégâts matériels ou des bles- sures, assurez-vous qu'a...
Page 20 legacy ™ model lrzm pool/spa heater installation and operation manual 10. 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 orie...
Page 21 legacy ™ model lrzm pool/spa heater installation and operation manual section 6. Electrical caution label all wires prior to disconnection when servic- ing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Attention au moment de l'en...
Page 22 legacy ™ model lrzm pool/spa heater installation and operation manual figure 16. Legacy connections/schematic wiring diagram schéma Électrique du chauffe-eau modèle millivolt millivolt heater electrical diagram bk - black w - white y - yellow r - red bk - noir w - blanc y - jaune r - rouge c...
Page 23 legacy ™ model lrzm pool/spa heater installation and operation manual caution do not attempt repairs on the gas controls or appli- ance. Tampering is dangerous and voids all warran- ties. Attention ne tentez pas d’effectuer des réparations au sys- tème de régulation du débit du gaz ou à l’ap...
Page 24 legacy ™ model lrzm pool/spa heater installation and operation manual the heater may not start on the fi rst try. Air in the gas line or other start-up situations may cause it to cycle. When raising the temperature of a cold pool, remove all time clock settings. This lets the fi lter system ...
Page 25 legacy ™ model lrzm pool/spa heater installation and operation manual h0325000- warning: if you do not follow these instructions exactly, a fi re or explosion may result, causing prop- erty damage, personal injury or loss of life. Instructions to light heater 1. Position on/off switch to “of...
Page 26 legacy ™ model lrzm pool/spa heater installation and operation manual caution in order to prevent property damage, the heater is designed to run only when the fi lter pump is run- ning. If the heater does not immediately turn off when the pump turns off, turn the heater off at the control pa...
Page 27 legacy ™ model lrzm pool/spa heater installation and operation manual 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 fi re unless the pump is running. If ...
Page 28 legacy ™ model lrzm pool/spa heater installation and operation manual table 6. Water temperature rise and flow rates (measured at return header) model minimum temp rise, °f (°c) maximum temp rise, °f (°c) minimum system flow gpm (lps) 125 3 (2) 7 (4) 30 (1.9) 175 5 (3) 10 (6) 30 (1.9) 250 7 ...
Page 29 legacy ™ model lrzm pool/spa heater installation and operation manual 4. Remove the drain plug from the inlet/outlet header, and completely drain the heater before the fi rst frost. See figure 21. 5. After all water has drained from the heater, check for mineral buildup in the openings. 6. U...
Page 30 legacy ™ model lrzm pool/spa heater installation and operation manual held beneath the burners. The fl ame should be a. Blue in color. B. 1 to 4 inches (25mm to 102mm) above burner surface (see figure 23). 7. Inspect the gas and electronic controls, including the following: a. High temperatu...
Page 31 legacy ™ model lrzm pool/spa heater installation and operation manual 11. Conduct a normal operating cycle and observe that the sequence proceeds as intended. Caution for your safety, when starting the heater, keep your head and face away from the burner area opening to prevent any risk of p...
Page 32 legacy ™ model lrzm pool/spa heater installation and operation manual table 8. Legacy troubleshooting guide # symptom cause remedy 1. Pump not operat- ing a. No power b. Pump defective c. Incorrectly wired a. Check circuit breakers and power source. B. Replace. C. Recheck wiring. 2. Pilot ou...
Page 33 legacy ™ model lrzm pool/spa heater installation and operation manual section 10. Professional maintenance and service warning servicing safety some of the servicing procedures for the legacy heater are hazardous because they involve fuel gas, electricity, moving parts and procedures which r...
Page 34 legacy ™ model lrzm pool/spa heater installation and operation manual 2. Temperature control - the jandy legacy controller is an electronic control which senses water temperature by means of a thermistor and controls heater operation to bring the water to the desired temperature. The desired...
Page 35 legacy ™ model lrzm pool/spa heater installation and operation manual figure 25. Test point identifi cation diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 21 bk - black, noir w - white, blanc y - yellow, jaune r - red, rouge 17 150° 130° 150° 130°.
Page 36 legacy ™ model lrzm pool/spa heater installation and operation manual if the main burners will not light after follow- ing the lighting instructions in section 7.3, check the voltage reading between the pp terminal on the gas valve (test point 1) and the th terminal on the gas valve (test po...
Page 37 legacy ™ model lrzm pool/spa heater installation and operation manual ture, which should be thoroughly investigated before replacement of limit switches. Excessive water temper- ature may be caused by low water fl ow. Water fl ow defi ciency may be due to obvious problems such as a defective...
Page 38 legacy ™ model lrzm pool/spa heater installation and operation manual open circuit, or readings outside of the range stated above, replace the controller. If the control is working correctly, reconnect the wires to the circuit board. 10.4.7.3 temperature sensor the temperature sensor is a 0-...
Page 39 legacy ™ model lrzm pool/spa heater installation and operation manual key no. Description model no. Order part no. Pilot/igniter system 1 pilot, main burner assembly, natural all r0494700 1 pilot, main burner assembly, propane all r0494800 2 pilot burner, natural all r0492900 2 pilot burner,...
Page 40 legacy ™ model lrzm pool/spa heater installation and operation manual 11.2 parts list (continued) key no. Description model no. Order part no. Jacket components (continued) 91 return side cover, top all r0482800 92 return side cover, bottom all r0482900 93 heat shield 125-400 r0483101-05 94 ...
Page 41 legacy ™ model lrzm pool/spa heater installation and operation manual 11.3 general exploded view 49 50 51 46 47 45 48 86 92 91 90 54 35 95 81 88 89 99 87 96 94 16 81 11 97 82 83 84 53 56 42 43 93 20 37 85 98.
Page 42 legacy ™ model lrzm pool/spa heater installation and operation manual 11.4 detailed exploded view 57 61 41 40 60 59 25 33 58 27 77,78 75 57 18 17 13 15 44 9 22 28 31 29 23 24 38 8 3 4 6 1 2 10 5 7 12 34 39 19.
Page 43 legacy ™ model lrzm pool/spa heater installation and operation manual 71 72 68 69 74 38 41 40 25 67 66 74 75 77,78 75 65 70 35 73 65 64 63 62 80 53.
H0299600d zodiac pool systems, inc. 6000 condor drive, moorpark, ca, usa 93021 • 800.822.7933 fax 877.327.1403 © 2010 zodiac pool systems, inc. 1007.
