Carrier 30GN040-420 operating instructions mA Demand Limiting

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Fig. 9 Ð 4-20 mA Demand Limiting

Factory Con®guration Codes Ð allows entry into

the factory con®guration subfunction. Under this subfunc- tion, there are 7 groups of con®guration codes that are down- loaded at the factory. Each group is made up of 8 digits. If processor module is replaced in the ®eld, these 7 groups of con®guration codes must be entered through the keypad and display module. Factory con®guration codes (groups 1 through 7) that apply to the particular Flotronic™ II chiller being serviced are found on a label diagram located inside the control box cover. See Table 13 for a summary of factory con®guration subfunction keystrokes.

Adjustable Field Con®gurations Ð After logging on, press

to enter subfunction. The subfunction allows opera- tion of the chiller to be customized to meet the particular needs of the application. The chiller comes from the factory precon®gured to meet the needs of most applications. Each item should be checked to determine which con®guration alternative best meets the needs of a particular application. See Table 14 for factory loaded con®guration codes and al- ternative con®gurations.

If processor module is replaced, the replacement module is preloaded with factory default con®guration codes. Each con®guration code must be checked and, if necessary, re- con®gured to meet needs of the application. See Table 14 for pre-loaded service replacement con®guration codes.

Service Con®guration Codes Ð Press

to enter the

service con®guration subfunction. The ®rst 2 items under this subfunction are 2 groups (8 digits each) of con®guration codes that are downloaded at the factory. If processor module is

replaced in the ®eld, the 2 groups of con®guration codes must be entered through the keypad and display module. The 2 groups of con®guration codes (groups 8 and 9) that apply to the unit being serviced can be found on a label diagram inside the control box cover. See Table 13 for keystroke in- formation to enter con®guration codes 8 and 9. The remain- ing items in this subfunction are read-only data provided to assist in service evaluations.

SCHEDULE FUNCTION Ð This function provides a means to automatically switch chiller from an occupied mode to an unoccupied mode. When using schedule function, chilled fluid pump relay must be used to switch chilled ¯uid pump on and off. Connections for chilled ¯uid pump relay are: TB3-3 and TB3-4. The chilled ¯uid pump relay starts chilled ¯uid pump but compressors do not run until remote chilled ¯uid pump interlock contacts are between TB6-1 and TB6-2 are closed and leaving chilled ¯uid temperature is above set point. If a remote chilled ¯uid pump interlock is not used, the ®rst compressor starts (upon a call for cooling) approximately one minute after chilled ¯uid pump is turned on.

The unit can be programmed for inactive, single set point, or dual set point operation.

When unit is con®gured for inactive, chilled ¯uid pump relay remains energized continuously but is not used since chiller is usually controlled by remote chilled ¯uid pump in- terlock contacts.

When unit is con®gured for single set point operation, chilled ¯uid pump relay is energized whenever chiller is in occu- pied mode regardless of whether chiller is running. When chiller is in unoccupied mode, chilled ¯uid pump relay is not energized.

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Contents Controls, Operation, Troubleshooting Tons Unit 30GN Unit Sizes and Modular CombinationsUnit Model Nominal Section a Section B 30GN Control Panel 040-110 Unit Shown LOCAL/ENABLE-STOP-CCN Switch Positions and Operation LOCAL/ENABLEKeypad and Display Module Also Called Hsio StopCompressor Protection Control Module Cpcs Thermistor and Transducer LocationsThermistors Pressure TransducersSteps Ð Capacity Control StepsLoading Sequence a Loading Sequence B Unit Control Ð Capacity Control Steps, 040-070 Ð Capacity Control Steps, 040-070 Displacement Compressors Approx 080, 230B 60 Hz A1²,B1²A1²**, B1² A1²**,B1²090, 245B 50 Hz Compressors Displacement090, 245B 60 Hz 100, 255B 270B 60 HzUnit Control Loading Sequence a Loading Sequence B 270B 50 Hz315B 50 Hz 110, 290B315B 60 Hz A1*,A2,B1 A1,A2,B1 A1²²,A2,B1,B2 A1*,A2,B1,B2 130 60 Hz 130 50 Hz 150, 230A, 245AA1,kB1 170, 270A 330A/B 60 Hz330A/B,360B 50 Hz 330A/B, 360B 50 Hz Approx 190, 290A, 360A/B 390B 60 HzA1,B1 A1**,B1210, 315A, 390A 420A/B 60 Hz420A/B 50 Hz Head Pressure Control PumpoutCondenser Fan Sequence FAN Arrangement FAN Numbers FAN Contactor Controlled byKeypad and Display Module Usage Functions and SubfunctionsFunction USE Keys Operative USE KeysAccessing Functions and Subfunctions Keypad DirectoryTemperature Keypad Directory StatusSubfunction Keypad Entry Display Comment Stage SET PointSubfunction Keypad Entry Display Comment Pressure AnalogInputs OutputsSubfunction Keypad Entry Display Comment Subfunction Keypad Entry Display Comment OutputsSubfunction Keypad Entry Display Comment Compressors Unloaders CPA1Keypad Directory Test Keypad Directory Schedule Keypad Directory Service ConfigurationService Subfunction Keypad Entry Display Comment FactoryALARM/ALERT Subfunction Keypad Entry Display Comment RUN TimeStarts HISTORY²²Reset SET Points Subfunction Keypad Entry Display Comment SET PointsDemand SET Points Date and TimeKeypad Display Comments Entry Response Example 1 Ð Reading Alarm CodesExample 2 Ð Reading Current Operating Modes Operational and Mode Display Codes Example 3 Ð Using Test Function Reset Set PointsExample 5A Ð External Reset Reset AmountsExample 4 Ð Reading and Changing Chilled Fluid Set Point Measurement Method Input Data DescriptionExample 5C Ð Using Return Fluid Temperature Reset Keypad Display Comments Entry ResponsePower SwitchComm Ð Communications Bus PWRService Functions PasswordSUB Keypad Display Comment LoggedonTo Disable Demand Limit Example 8 Ð Setting Time of Day Day of Week4-20 mA Demand Limiting Adjustable Field Congurations Factory Conguration KeystrokesExample 9 Ð Using the Schedule Function Keypad Display Comment EntryProgramming Period Keypad Display Comment Entry Programming PeriodExample 10 Ð Holiday Schedule Function Enter DisplayTypical Stoppage Faults and Reset Types Stop position. Unit cannot start if these contacts areAlarm and Alert Codes LOCAL/ENABLE-STOP-CCNWSM CpcsFSM COM, Comm DGTDsio HPSComm CGF Subfunction. Groups Electronic Expansion Valve EXV EXV Cable Connections to EXV Driver Module, Dsio EXV Thermistor Replacement T1, T2, T7, T8 Temperature Voltage Resistance Drop Ohms Temperature Voltage Resistance Drop Thermistor and Pressure Transducer Locations Thermistor Locations Circuits a and B, Lead Compressor Only Lead Compressor Transducer and Thermistor Locations Module Address Selector Switch Locations Control ModulesAccessory Unloader Installation Installation 4 In/4 Out Module SIOTroubleshooting Standard and Accessory UnloadersPage Or HGBPR-A ²Or HGBPR-BHgbpr Ð COMExternally Powered Outdoor-Air TemperatureCWP Ð Chilled Water Fluid Pump TB Ð Terminal BlockRemote Alarm InterlocksPage Copyright 1995 Carrier Corporation

30GN040-420 specifications

The Carrier 30GN040-420 is a well-regarded model within the industry of chillers, designed to deliver efficient cooling solutions for a variety of commercial applications. Its compact design and advanced technology make it an ideal choice for businesses looking to optimize their HVAC systems.

One of the standout features of the Carrier 30GN series is its flexibility. This chiller model is available in a range of capacities, specifically from 40 to 420 tons, allowing for customized solutions based on specific cooling demands. Such versatility enables this unit to cater to a broad array of installations, from small commercial spaces to larger industrial facilities.

The Carrier 30GN040-420 utilizes a scroll compressor design, known for its reliability and efficiency. The scroll technology allows for a reduction in the number of moving parts, resulting in lower maintenance costs and increased durability. Additionally, the unit operates with environmentally friendly refrigerants such as R-410A, promoting sustainability without compromising performance.

Energy efficiency is another significant aspect of this model. The 30GN series is designed to provide high energy efficiency ratios (EER), which translates to lower operational costs for users over the lifespan of the unit. This is particularly beneficial in an era where energy costs are consistently rising.

The advanced controls found within the Carrier 30GN040-420 further enhance its performance and ease of use. The unit is equipped with a microprocessor-based control system that allows for precise temperature management while providing valuable diagnostic information. This feature not only improves the overall reliability of the system but also facilitates proactive maintenance, reducing the risk of unscheduled downtime.

Moreover, the design of the Carrier 30GN040-420 emphasizes quiet operation, making it suitable for environments where noise levels must be minimized. This characteristic is critical for applications in hospitals, schools, or office buildings, where a peaceful atmosphere is essential.

In summary, the Carrier 30GN040-420 chiller provides a robust solution for businesses requiring dependable and efficient cooling. Its features, including flexible capacity options, reliable scroll compressors, energy-efficient performance, advanced controls, and quiet operation, position it as a top choice for various commercial and industrial applications. As technology continues to evolve, models such as the 30GN series remain at the forefront, meeting the demands of modern HVAC needs while ensuring sustainability and efficiency.
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