Carrier Supra 950MT Operation & Service Manual

Also see for SUPRA 950Mt: Operation and service manual Operator's manual

5-3 62-118635.2 SERVICING ENGINE-RELATED COMPONENTS5.2.1 Cooling SystemThe condenser and radiator can be cleaned at the same time. The radiator must be cleaned internally as well asexternally to maintain adequate cooling.The condenser and radiator are incorporated into a single assembly. The condenser fans draw the air through the con-denser and radiator coil. To provide maximum air flow, the condenser fan belt should be checked periodically andadjusted if necessary to prevent slippage.CAUTION!Use only ethylene glycol antifreeze (with inhibitors) in system as glycol by itself will damagethe cooling system. Always add pre-mixed 50/50 antifreeze and water to radiator/ engine. Neverexceed more than a 50 percent concentration of antifreeze. Use a low silicate antifreeze.1. Remove all foreign material from the radiator/condenser coil by reversing the normal air flow (Air is pulled inthrough the front and discharges over the standby motor). Compressed air or water may be used as a clean-ing agent. It may be necessary to use warm water mixed with any good commercial dish washer detergent.Rinse coil with fresh water if a detergent is used.2. Drain coolant by removing the lower radiator hose and radiator cap.3. Install the hose and fill system with clean, untreated water to which three to five percent of an alkaline basedradiator cleaner should be added (six ounces - dry 151 grams to one gallon = 3.78 liters) of water.4. Run the engine 6 to 12 hours and drain the system while warm. Rinse system three times after it has cooleddown. Refill system with water.5. Run the engine to operating temperature. Drain the system again and fill with treated water/antifreeze.NOTICENEVER POUR COLD WATER INTO A HOT ENGINE. However, hot water can always be added toa cold engine.Figure 5.1 Cooling CircuitWTSCoolant pumpThermostatCoolant Outlet Pressure CapOverflow TankCoolant Inlet (cold inside)(Water Temperature Sensor)(Hot Side)