User manual TRANE RTAD-SVX01E

[. . . ] Installation Operation Maintenance Series RTM Air-Cooled Helical Rotary Liquid Chiller RTAD 085 - 180 (50Hz) Standard, Free Cooling and Heat Recovery models RTAD-SVX01E-E4 General information Foreword These instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance by the user, of Trane RTAD chillers. They do not contain full service procedures necessary for the continued successful operation of this equipment. The services of a qualified technician should be employed through the medium of a maintenance contract with a reputable service company. Units are assembled, pressure tested, dehydrated, charged and run tested before shipment. [. . . ] The UCM provides auxiliary control for a customer-specified or installed contact closure for ice making. When the remote contact connected to the module A9, terminals TB1 1 and 2, is provided, the chiller will run normally when the contact is open. Upon contact closure, the UCM will initiate an ice-building mode, in which the unit runs fully loaded at all times. For example, if the front panel or external current limit setpoint is set to 80%, in ice-building the active current limit is 120%. If, while in ice-building mode, the unit gets down to the freezestat setting (water or refrigerant), the unit will shut down on a manually resettable diagnostic, just as in normal operation. Isolated 2-10 V (dc) voltage source input Set dipswitch SW1-1 of the option module A9 to "OFF Connect the . " voltage source to terminals 4 (+) and 5 (-) on option module A9 TB1. CWS is now based on the following equation: CWS °C = (V (dc) * 4. 88) - 27. 56 Sample values for CWS vs. External chilled-water setpoint Resulting chilled-water setpoint (°C) -10 -5 0 5 10 Voltage (V (dc)) 3. 6 4. 6 5. 6 6. 7 7. 7 Current (mA) 7. 2 9. 2 11. 3 13. 3 15. 4 Isolated 4-20 mA current source input Set dipswitch SW1-1 of the option module A9 to "ON. " Connect the current source terminals 4 (+) and 5 (-). CWS is now based on the following equation: Setpoint (°C) = (mA * 2. 44) - 27. 56 External chilled-water setpoint: voltage source 2-10 V (dc), or current source 4-20 mA This option allows the external setting of the chilled-water setpoint (CWS), independent of the front panel chilled-water setpoint, by one of two means: 1 - An isolated voltage input 2-10 V (dc) 2 - An isolated current loop input 4-20 mA Note: For Free-Cooling units, this option will be available only in Compressor mode. RTAD-SVX01E-E4 55 Installation - Electrical External current limit setpoint: voltage source 2-10 V (dc) or current source 4-20 mA. This option allows the external setting of the current limit setpoint (CLS), independent of the front panel current-limit setpoint, by one of the two means: 1 - an isolated voltage input 2-10 V (dc) 2 - an isolated voltage input 4-20 mA To enable external current-limit setpoint operation, external currentlimit setpoint (operator setting menu) should be set to "E" using the clear language display. 1- 2-10 V (dc) voltage source input Set dipswitch SW1-2 of the option module A9 to "OFF . " Connect the voltage source to terminals 7 (+) and 8 (-) of the option module A9. CLS is now based on the following equation: CLS % = (V (dc)*10) + 20 Sample values for CLS vs. Minimum setpoint: 40% (2. 0 V (dc)input) Maximum setpoint: 120% (10. 0 V (dc)input) 4-20 mA Current source input Set dipswitch SW1-2 of the option module A9 to "ON. " Connect the current source to terminal 7 (+) and 8 (-) of option module A9. CLS is now based on the following equation: CLS % = (mA * 5) + 20 Sample values for CLS versus mA signals are shown in Table 29. Minimum setpoint = 40% (4. 0 mA) Maximum setpoint = 120% (20. 0 mA) Table 37 - Input values vs. external current-limit setpoint Resulting chilled-water setpoint (°C) 40 50 60 70 80 90 100 110 120 Outdoor air-temperature sensor This sensor is used for low ambient lockout and chilled-water reset by outdoor air temperature. Remove the sensor from its shipping location in the control panel and install it in the fresh-air intake on the north wall of the building. Protect the sensor from direct sunlight and shelter it from the elements. All wiring to and from the remote sensor must be made with shielded, twisted-pair conductors. Apply tape to the sensor end of the shielding to prevent it from contacting the surface. To prevent injury or death, disconnect the electrical power source before completing wiring connections to the unit. Voltage (V (dc)) 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 10. 0 Current (mA) 4. 0 6. 0 8. 0 10. 0 12. 0 14. 0 16. 0 18. 0 20. 0 Note: Not available for Free-Cooling units. 56 RTAD-SVX01E-E4 Installation - Electrical CAUTION! [. . . ] 7 When oil comes out of the flare fitting on the oil line shut off valve the filter is full. 8 Put the cap on the flare on the oil line shut off valve, remove the charging hose and put the cap back on the flare on the filter housing. 9 Vacuum the compressor (low side) and prepare it for inclusion in the system. Severe damage to the compressor can result if the oil line shut off valve is closed when the compressor is started. [. . . ]