Rheem P-M406 Operating Instructions - Page 26

ELECTRICAL WIRING NOTE: If it is necessary to replace any of the original wiring, use 105°C wire or its equivalent, and/or 150°C wire or its equivalent, like the original wiring. MILLIVOLT MODELS The Millivolt models are equipped with a self-generating electrical system in which the electrical current is provided by a pilot generator. No external electrical connections are required. When installing a remote switch, do not exceed 10 ft of wiring from the heater. Use 18-gauge stranded wire. CAUTION: Heater must be electrically grounded and bonded. Bonding lug is provided loose with the heater. Install bonding lug on lower right or left side of jacket as necessary for bonding the heater. Mounting hole is provided on the jacket. NOTE: Failure to ground the heater electrically could affect the heater's electronics. The Electronic Intermittent Ignition Device automatically lights the pilot and main burners upon a call for heat. The heater is supplied with a dual-voltage transformer for 120 VAC or 240 VAC input power hookup. ADVANCED FLAME TECHNOLOGY (AFT) MODELS WARNING: Heaters are factory-wired for 240 VAC power sup- ply. DO NOT attempt to operate at 208 VAC. NOTE: See page 38 for further instructions if using a time clock/fireman's switch. OPTION LOCATION LEFT SIDE FIELD WIRING CONTROL BOX (FACTORY MOUNTED LOCATION) The standard field-wiring connection is on the right side of the heater. To wire the heater from the left side, follow these steps : 1. Remove the two (2) screws that hold the front door to the heater. Remove and set aside door for better access to wiring. 2. Remove the four (4) screws that hold down the junction box to the sway brace. 3. Remove the transformer cover located on the far right by removing one (1) screw. 4. Remove the two (2) screws that hold down the transformer. 5. Remove the one (1) screw that holds down the ground wires. 6. Disconnect P6 connector from PC board. 7. Remove transformer from its current location and relocate it on the far left side of the heater. 8. Re-route all high-voltage wires and ground wires through the left jacket side of heater. 9. Re-install P6 connector, ground wires (SPG), transformer, junction box, front door, and plug right side with the left side's grommet plug. SWAY BRACE BONDING LUG (OPTIONAL LOCATION) ATMOSPHERIC Wiring locations BONDING LUG (STANDARD LOCATION) OPTION LOCATION LEFT SIDE FIELD WIRING CONTROL BOX (FACTORY MOUNTED LOCATION) NOTE: 7/8" dia. holes not utilized on jacket and control box can be used for fireman switch, auxiliary control interface or power vent (D-2) wiring. BONDING LUG (OPTIONAL LOCATION) SWAY BRACE BONDING LUG (STANDARD LOCATION) LO NOx Wiring locations 26