Hayward HP21404TC HeatPro_Square_Manual_Rev_G_5148 - Page 16

51300003301G AUTOMATIC CHLORINATORS AND CHEMICAL FEEDERS: If used, a chlorinator must be installed downstream from the heater in the pool return line and at a lower elevation than the heater as shown in Figure10. Install a separate positive seal corrosion resistant check valve between the heater outlet and the chlorinator to prevent highly concentrated sanitizer from back siphoning into the heater. Back siphoning may occur when the pump is shut off and a pressure differential is created. Figure10: Automatic Chlorinator ELECTRICAL CONNECTIONS: GENERAL INFORMATION: An external supply of power is required to operate the pool heater system. Review SPECIFICATIONS for this heater in the GETTING STARTED section to properly size field power connections. All wiring connections to the heater must be made in accordance with the latest edition of the National Electrical Code ANSI/NFPA 70, unless local code requirements specify otherwise. In Canada, follow CSA C22.1 Canadian Electrical Code, Part 1. The heater must be electrically grounded and bonded in accordance with local codes or, in the absence of local codes, with National Electrical Code, ANSI/NFPA 70. Wiring connections must be made as shown in the wiring diagram found inside the heater cabinet, and a copy is provided for convenience in the GETTING STARTED section at the beginning of the manual. The heater must also have an independent ground and bond connections. There is a ground lug inside the control box adjacent to the power connections and a bonding lug on the side of the heater. Use a solid copper conductor, size 8 or larger. Run a continuous wire from external bonding lug to reinforcing rod or mesh. Connect a No. 8 AWG (8.4 mm2) solid copper bonding wire to the grounding lug provided on the heat pump and to all metal parts of swimming pool or spa, and to all electrical equipment, metal piping (except gas piping), and conduit within 5 ft. (1.5 m) of inside walls of swimming pool or spa. IMPORTANT - Reference NEC codes for all wiring standards including, but not limited to, grounding, bonding and other general wiring procedures. WARNING: Risk of Electric Shock Review all safety information provided in the GETTING STARTED section of this manual prior to servicing. Always disconnect power circuit before connecting the heat pump, or working on the heat pump. This equipment contains wiring that carries high voltage. Contact with these wires could result in death or personal injury and/or may also cause property damage. WARNING: All electrical wiring MUST be in conformance with all applicable local codes, regulations and the National Electric Code (NEC), in particular NEC Article 680: Swimming Pools, Fountains & Similar Installations and Article 440: Air-Conditioning & Refrigeration Equipment. NOTICE: Manufacturer does not recommend the use of ground fault protective devices in conjunction with heat pumps. Most service calls regarding tripping of ground fault devices, are found to be "nuisance" calls. GFCI nuisance trips are not covered under warranty. NOTICE: If voltage drops below 208V, this may damage the heat pump and void the warranty. Take proper steps to ensure correct voltage at the heat pump during operation 16 USE ONLY GENUINE REPLACEMENT PARTS