PUMP HOUSE UTILITY HEATER INSTALLATION AND OPERATION INSTRUCTIONS MODELS RPH1-5A, RPH2-5A . Mount Heater a minimum of 18 inches from floor. . Disconnect all electrical service before proceeding, remove the grille enclosure, make all wiring connections in accordance with the National Electric code and for other applicable codes. . Reinstall the grille enclosure, restore electrical power to heater, adjust thermostat as desired. The thermostat temperature range degrees F. .