Electrical Wiring
The electrical power supply requirement for these heaters is 120 volts, 60 Hz. Field wiring connections and electrical grounding must comply with the local codes, or in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70. Provide a separate fused circuit from the main electri- cal panel to the heater, and a disconnecting means within sight of the heater.
Remove the control box cover and make the power supply connections in the field wiring compartment. The pump is supplied and factory wired to operate with the heater. The current draw is approximately 2.0 amps. Refer to the heater internal wiring diagrams shown on pages 17 to 21.
NOTE: Minimum 18 AWG, 105°C, stranded wire must be used for all low voltage (less than 30 volts) external connections to the unit. Solid conductors should not be used because they can cause excessive tension on contact points. Install conduit as appropriate. All high voltage wires must be the same size (105°C, stranded wire) as the ones on the unit or larger.
NOTE: If it is necessary to replace any of the original wiring, it must be replaced with 105°C wire or its equivalent, except 150° black wire which must be replaced with 150° wire or its equivalent.
16