Improper installation and/or operation will void the warranty. Installation and Operation Manual LX™ and LT™ Gas-Fired Pool Model LX250 and Spa Heater Shown 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. H0214000B TABLE OF CONTENTS SECTION 1 General Information 1A Introduction ............................................................ 1 1B Description............................................................. 1 1C Warranty ................................................................ 1 SECTION 2 Installation Instructions 2A General Requirements .......................................... 1 2A-1 Special Precautions ............................................... 1 2B Heater Assembly and Preparation ........................ 1 2C Heater Location ..................................................... 2 2C-1 Installation Information .......................................... 2 2C-2 Installation Clearances .......................................... 2 2C-3 Flooring Typical Installation ................................... 2 2D Outdoor Installation ............................................... 3 2E Outdoor Shelter Installation (Canada) ................... 3 2F Indoor Installation .................................................. 3 2F-1 Preparation of Heater For Indoor Installation .................................................. 3 2F-2 Special Location Requirement .............................. 4 2F-3 Air For Combustion and Ventilation ...................... 4 2F-4 Exhaust Venting .................................................... 4 2F-4a Important Information On Vent Pipe Sizing ........... 4 2F-4b Vent Pipe Sizing and Installation ........................... 5 2G Gas Supply and Piping .......................................... 5 2G-1 General Instructions .............................................. 5 2G-2 Special Precautions For Propane Gas .................. 8 2H Electrical Power ..................................................... 8 2H-1 General Information ............................................... 8 2H-2 Bonding ................................................................. 8 2H-3 Auxiliary Time Clock Wiring................................... 8 2H-4 Remote Operation ................................................. 9 2I Water Piping ........................................................ 10 2I-1 Reversal of Heater Water Connections............... 10 2I-2 Pool/Spa Piping Systems .................................... 13 2I-3 Connections at Heater ......................................... 13 2I-4 Pressure Relief Valve .......................................... 14 2I-5 Automatic Chlorinators (Chemical Feeders) ....... 15 2J Start-Up and Adjustment ..................................... 15 2J-1 Normal Operation ................................................ 15 2J-2 Start-Up ............................................................... 15 2J-3 Gas Pressure....................................................... 16 2J-4 Adjustment of Water Pressure Switch................ 16 2J-5 Water Temperature Rise ..................................... 17 SECTION 3 Operating Instructions 3A Start-Up Procedure.............................................. 18 3B Temperature Controls ......................................... 18 3B-1 Information Displayed .......................................... 19 3B-2 Turning The Heater On Or Off ............................. 19 3B-3 Setting Pool And Spa Temperatures And Changing From Fahrenheit To Celcius ............... 19 3B-4 Error Status ......................................................... 19 3C Lighting and Shutdown ........................................ 21 3C-1 Lighting the Heater .............................................. 21 3C-2 Shutdown ............................................................. 21 3D Water Chemistry.................................................. 21 3D-1 Pools .................................................................... 21 3D-2 Spas .................................................................... 21 3D-2a Spa Water Chemistry .......................................... 23 3D-2b Water Changing .................................................. 23 3D-2c Corrosion ............................................................. 23 3D-2d Testing ................................................................. 23 3E...