Thermo King Precedent S-700 Trailer Refrigeration System

The Thermo King Precedent S-700 is a single-temperature trailer refrigeration unit built for deep-frozen cargo and higher-ambient climates, using a greater-than-25-horsepower engine (TK488CRH, 35 hp at 2,600 rpm) — the highest-output engine in the Precedent single-temp lineup. It's certified CARB Evergreen, meeting California Air Resources Board and EPA emissions standards for the life of the unit without ever needing a Diesel Particulate Filter — emissions compliance instead comes from common rail fuel injection, exhaust gas recirculation, and a diesel oxidation catalyst. The engine is a four-cylinder, direct-injection, liquid-cooled diesel with a 12-quart oil capacity and a 3,000/4,000-hour maintenance interval. Cooling is handled by an X430L reciprocating compressor with a 30.0 cubic-inch displacement, lightweight aluminum-alloy body, heads, and sump, charged with 14.5 lbs of R404A refrigerant. Rated refrigeration capacity (engine power with ETV, at 100°F ambient) is 68,000 BTU/hr (19,929 watts) at 35°F, 37,000 BTU/hr (10,844 watts) at 0°F, and 25,000 BTU/hr (7,327 watts) at -20°F. On electric power the unit delivers 50,000/35,000/25,000 BTU/hr at the same three setpoints. Heating capacity is 72,000 BTU/hr and airflow is rated at 3,300 ft³/min. The unit weighs 1,872 lbs and measures 81.6 x 86.2 x 24 inches, mounted on a 50-gallon aluminum undermount fuel tank with a visual fuel-level gauge. Standard features include the Smart Reefer 4 (SR4) controller with a temperature data logger, ServiceWatch and OptiSet Plus diagnostics, an integrated USB port, TracKing telematics from the factory, a permanent-magnet generator, microchannel condenser coils, a dual-speed evaporator fan, and composite door panels with auto-latch and auto secondary latch. Factory options include a Severe Duty Package (4,000-hour filtration with synthetic oil), a Supplemental Power Kit, an Arctic Package, LED lighting and chrome appearance packages, a 65-amp alternator, and a fresh-air exchange system.