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Introduction This manual provides installation and operation instructions for the Laars Lite, Model LLG and LLD pool and spa heaters. Read these installation and operation instructions completely before proceeding with the installation. Consult the Teledyne Laars factory, or local factory representative, with any questions regarding this equipment. Experience has shown that most operating problems are caused by improper installation. The Laars Lite heater is design certified by International Approval Services (formerly American Model Size Heater Width Venting Dimensions Firing Rate / Hr. (1,000's)Vent Diameter U.S. Outdoor Dim "H" U.S. Indoor or CAN Outdoor Shelter Dim "H" in (cm) in (cm) in (cm) in (cm) BTU (kcal) 125 15 (38) 5 (12.7) 9 1/8 (23) 16 1/4 (41.3) 125 (31.5) 175 18 (45.7) 6 (15.2) 9 3/4 (24) 24 1/8 (61.3) 175 (44.1) 250 22 1/2 (57.2) 7 (17.8) 10 (26) 25 1/4 (64.1) 250 (63) 325 26 3/4 (67.9) 8 (20.3) 10 5/8 (27) 26 1/2 (67.3) 325 (81.9) 400 31 3/4 (80.6) 9 (22.9) 13 1/4 (34) 27 1/2 (69.9) 400 (101) Notes: 1. In Canada, derate BTU/Hr input and output 10 percent for altitudes of 2,000 to 4,500 feet (609 to 1372 m) above sea level. No derating necessary up to altitude of 2,000 feet (609 m). In United States derate input 4 percent for each 1,000 feet (305 m) above sea level, starting at 2,000 feet (609m). 2. The Laars Lite is constructed for 75 psi working pressure. 3. Ratings shown are for both natural and propane gas. Figure 1. General Configuration. Page 2 Gas Association and Canadian Gas Association) as complying with the latest edition of the Standard for Gas-Fired Pool Heaters, ANSI Z21.56, and in Canada with CAN1-4.7-M85. Certain sections of this manual are specific to either United States or Canadian installations, and are labeled as such. 1B. Description The Laars Lite LLD heater gets electrical power from an external 120V / 240V (volt AC) source and provides a dual thermostat Flex-Temp control system for pool/spa combinations or pre-heat convenience. The Laars Lite LLD heater also meets the California, New York, Hawaii, and Oregon state energy requirements for intermittent ignition gas appliances. The Laars Lite LLG heater is a self contained standing pilot unit and requires no external power. The Laars Lite heater is specifically designed for heating swimming pools and spas. Do not use it as a general service water heater or for heating salt water pools. Consult your dealer for the appropriate Teledyne Laars products for these applications. 1C. Warranty The Laars Lite heater is sold with a limited factory warranty. Details are specified on the back cover of this manual. A copy of the warranty and a warranty registration card are included in the plastic bag shipped with the heater. Fill out and return the warranty registration card. Make all warranty claims to an authorized Teledyne Laars representative or directly to the factory. Claims must include the heater serial number and model (this information can be found on the rating plate), installation date, and name of the installer. Shipping costs are not included in the warranty coverage. Damage caused by improper installation or assembly, or to the heat exchanger by corrosive water, is NOT covered by the Warranty. See Section 3D for maintaining proper pool water chemistry. NOTE: Keep this manual in a safe place for future reference when inspecting or servicing the heater. 1D. Technical Assistance Consult Teledyne Laars or your local distributor with any questions or problems involving the specifications, installation, and operation of your Teledyne Laars equipment. An experienced technical support staff is ready to assist in assuring the proper performance and application of Teledyne Laars products. SECTION 2. Installation Instructions 2A. General Information Install the Laars Lite heaters in accordance with the procedures in this manual, local codes and ordinances, and in accordance with the latest edition of the National Fuel Gas Code, ANSI Z223.1. In Canada, the installation must be in accordance with CAN1-B149.1 or .2 and local codes. The authority having jurisdiction may require the installation conform to the Standard for Gas-Fired Heaters, ANSI Z21.56. Any changes to the heater, gas controls, gas orifices, wiring, draft diverter, or improper installation may void the warranty. If field conditions require change to any of the above, consult the factory. All gas-fired products require correct installation to assure safe operation. The requirements for pool heaters include the following: 1. Field assembly (if required) 2. Appropriate site location (clearances) and flooring 3. Sufficient combustion and ventilation air 4. Properly sized gas meter and piping 5. Proper electrical wiring (if required) 6. Adequate water flow This manual provides the information needed to meet these requirements. Review all application and installation procedures completely before continuing the installation. 2B. Field Assembly The Laars Lite heater is shipp...

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