Carrier Air 4 Life Manual
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R OPERATOR’S MANUAL for SPLIT SYSTEM Bus Air Conditioning Units T--326 Rev -- Transport Air Conditioning TRANSPORT AIR CONDITIONING
OPERATOR’S MANUAL BUS AIR CONDITIONING UNITS GEN IV & GEN V
i CONTENTS Page Introduction 1............................ Safety 3.................................. Unit/System Information 4................. 1.1 WHAT IS AIR CONDITIONING 4............. 1.2 SPLIT SYSTEM 4.......................... 1.3 SYSTEM DESIGNATIONS 4................ 1.4 SYSTEM COMPONENTS 4................. 1.5 MODEL AND SERIAL NUMBER TAGS 6...... 1.6 SYSTEM REQUIREMENTS LABEL 8........ Unit Operation 9.......................... 2.1 OPERATING INSTRUCTIONS 9............. 2.2 DRIVER’S CONTROL PANEL -- STANDARD 9. 2.3 DRIVER’S CONTROL PANEL -- FLORIDA 10... 2.4 PRE--TRIP INSPECTION 12.................. System Maintenance 13.................... 3.1 Maintenance Schedule 13.................... 3.2 Warranty/Service 14......................... Index Index 1...............................
1 INTRODUCTION SPLITSYSTEMOPERATOR’SMANUAL This guide has been prepared for the operator of Carrier Transport Air Conditioning systems.It contains basic instructions for the daily operation of the air conditioning systemas well as safety information, and other information that will help you to maintain a comfort level for your self and your passengers. Please take the time to read the information contained in this booklet and refer to it whenever you have a question about the operation of your Carrier Transport Air Conditioning system. More comprehensive information can be found in the Split System Operation and Service Manual (T-- 299). This manual can be obtained from your Carrier Transport A/C dealer. Your air conditioning systemhas been engineered toprovide long, trouble-free performance when it is properly operated and maintained. A comprehensive maintenance program will help to insure that the unit continues to operate reliably. Such a maintenance program will also help to control operating costs, increase the unit’s working life, and improve performance. Some Vehicles may require information from manuals supplied by the vehicle manufacturer or other special equipment suppliers. We urge you to review all these publications carefully. This will help you enjoy safe and trouble-- free operation of your vehicle. When having your unit serviced, be sure to specify genuine Carrier Transicold replacement parts for the highest quality and best reliability. Carrier Transport Air Conditioning Dealers know your vehicle air conditioningsystem best andwill ensure your complete satisfaction. To find the Dealer nearest you, go to www.transportaircon.carrier.com and click on “Dealer Locator”, or refer to the CarrierBus StopDealer Directory (62-- 10810) or contact the Carrier Transport Air Conditioning Technical Service Hot-- Line 1 (800) 450-- 2211. At Carrier Transport Air Conditioning, we are continually working to improve the products that we build for our customers. As a result, specifications may change without notice.
3T-- 326 SAFETY Your Carrier Transport Air Conditioning system has been designed with the safety of the operator in mind. During normal operation, all moving parts are fully enclosed to help prevent injury. During all pre-trip inspections, daily inspections, and problem troubleshooting, you may be exposed to moving parts; please stay clear of all moving parts when the unit is in operation. WARNING Beware of unannounced starting of the unit. The unit may cycle the fans and operating compressor unex- pectedly as control requirements dictate. Turn system off and disconnect battery power. REFRIGERANT The refrigerant contained in the air conditioningsystem can cause frostbite, severe burns, or blindness when in direct contact with the skin or eyes. For this reason, and because of legislation regarding the handling of refrigerants during system service, we recommend that, whenever your unit requires service of the refrigeration system, you contact your nearest Carrier Transport Air Conditioning authorized dealer for service.
4 T-- 326 UNIT/SYSTEMINFORMATION 1.1 WHAT IS AIR CONDITIONING Air Conditioning is the cooling, heating, dehumidification, and filtration of the air within the passenger compartment of a vehicle. 1.2 SPLIT SYSTEM A Split System normally includes an Evaporator(s), a Condenser(s) a Compressor(s) and interconnecting refrigerant hoses, fittings, and electrical harnesses and controls. A listing of the system components, along with specific data for each, is provided in Paragraph 1.4. 1.3 SYSTEM DESIGNATIONS Tie-- In System --Is a Carrier evaporator and condenser connected to an existing OEM compressor and dash evaporator. The OEM radiator type condenser is normally removed. Max System --A Carrier system installed along with an existing OEM system. The systems operate independent of each other. Stand -- Alone (Standard) System --All Carrier components installed on a vehicle. These can be either single or dual compressor systems. 1.4 SYSTEM COMPONENTS (Refer To Figure 1-1) Return Air Thermostat/Sensor --The system may be supplied with a thermostat or thermistor. Both of these devices are temperature sensitive components which when activated, signals the Electro-- Magnetic Clutch to engage/disengage. The return air thermostat is normally located in the drivers control panel while the return air thermistor is normally located in the return air flow of the evaporator assembly. Electro --Magnetic Clutch --The Electro-- Magnetic clutch controls the operation of the compressor. When engaged, the compressor circulates refrigerant and provides cooling. Compressor --The compressor is a belt driven, high-- pressure pump, which circulates the refrigerant through the evaporator and condenser . The operation of the compressor is controlled by the Electro-- Magnetic clutch. Condenser --The condenser is normally located in the skirt or on the roof of the vehicle. Its primary function is to reject heat, which was transferred to the refrigerant by the evaporator from the passenger compartment of the vehicle.
5T-- 326 Air In Air OutAir In Air Out10 1 23 45 6 789 1. Compressor 2. Electro-- Magnetic Clutch 3. Discharge Line 4. Condenser 5. Filter Dryer/Sight Glass Assembly6. Liquid Line 7. Evaporator 8. Block Valve (TXV) 9. Freezestat-- (Coil freeze-- up thermostat) 10. Suction Line Figure 1-1 Component Locations Filter/Dryer --The filter/dryer removes moisture and particulate matter from the refrigerant. Expansion/Block Valve --Meters the refrigerant flow into the evaporator coil. The majority of the Gen 4 (Excel) and all Gen 5 systems use anonadjustable block valve with an 8°F superheat setting, which is preset at the factory. If you feel there is a problem with the block valve, do not attempt to adjust the valve, if needed, it should be replaced by an authorized Carrier Transport A/C service center. Evaporator --The evaporator is located in the interior of the vehicle. Its primary function is to transfer heat contained in the passenger compartment air, into the refrigerant, which is circulated by the compressor, through the evaporator coil. During this process the air is also filtered and dehumidified. Resistor --Resistors are used to control the speeds of the permanent magnet evaporator blower motors.
6 T-- 326 Pressure Switch --The systems use high and low pressure switches wired in series to control the power circuit of the compressor clutch relay. If either pressure switch opens, interrupting the circuit to the clutch relay, the operation of the compressor will stop. When conditions return to normal the switch will automatically reset and the compressor will resume operating. The switches are non-- adjustable. Freeze--Up Thermostat --Freeze-- up thermostats are used to prevent ice formation on the evaporator coil, which is an indication that liquid refrigerat is getting back to the compressor. Carrier Transport Air Conditioning systems use a freeze thermostat (freezestat) wired in series with the system pressure switches and thermostat/thermistor to control the operation of the compressor clutch. Refrigerant --A refrigerant is a material that is used to move heat from the passenger compartment to the outside air. It is a substance that gives up heat by condensing at high temperature and pressures and absorbs heat by evaporating at low temperatures and pressures. The heat transfer properties exhibited when refrigerant changes state is the foundation of the refrigerant cycle. 1.5 MODEL AND SERIAL NUMBER TAGS In order to identify the air conditioning components you have, you will need to know the model number and serial number. All Carrier Transport Air Conditioning evaporators, condensers and compressors have a model/serial number tag located on the assembly. See Figure 1-2 for skirt mounted condenser data tag location, Figure 1-3 for the CM-- 7/11 rooftop condensers data tag location, Figure 1-4 for GEN 4 (Excel) evaporator data tag location and Figure 1-5 for GEN 5 evaporator data tag location. Knowing these locations and the information on the data tags will aid you in identifying the correct service procedures. Figure 1-2 Skirt Mounted Condensers
7T-- 326 Figure 1-3 Roof Mounted Condensers EM-- 9 Location Figure 1-4 Rear/Side Mounted Gen IV Evaporators NOTE The EM-- 9 evaporator data tag is located on the side of the evaporator assembly, not between the blower assemblies. Figure 1-5 Rear/Side Mounted Gen V Evaporators
8 T-- 326 1.6 SYSTEM REQUIREMENTS LABEL The system requirements label (See Figure 1-6) is conveniently located within the vehicle’s engine compartment. This label, when properly completed by the installer, will give the servicing technician the refrigerant and oil charge(s), evaporator(s), condenser(s), and compressor(s) serial numbers, the drive belt(s) number, mount kit number, the date of installation and the installer. Figure 1-6 System Requirement Label