1ST MAINTENANCE TUNE-UP PER SERVICE AGREEMENT FOR 2 HT UNITS, 1 AND 4 YRS. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CLEAN AND CHECK BURNERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CHECK HEAT EXCHANGER, CHECK HIGH LIMIT CONTROL, FAN CONTROL, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS WORKING GOOD.