Carrier 30GN040-420 operating instructions Thermistor and Pressure Transducer Locations

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LEGEND

DPT Ð Discharge Pressure Transducer

EXV Ð Electronic Expansion Valve

OPT Ð Oil Pressure Transducer

SPT Ð Suction Pressure Transducer

T Ð Thermistor Number

Fig. 14 Ð Thermistor and Pressure Transducer Locations

Pressure Transducers Ð A single style of pressure transducer is used for both high- and low-pressure sensing on Flotronic™ II chillers. However, this transducer must be calibrated before the unit will operate. On new units, this will have been done at the factory in order to test run the unit. If a transducer or PSIO is replaced in the ®eld, how- ever, the transducer will have to be ®eld calibrated as follows:

1.Disconnect transducer from the system.

2.Hang the transducer in the atmosphere.

3.Press on the HSIO keypad, and Read the pres- sure. Pressures before calibration must be within the range of 6 5 psig. If the pressure is outside the range of 6 5 psig, the HSIO display will read ---. If this is the case, replace the transducer or PSIO or check for a wir- ing error. If the value of the atmospheric pressure is greater than 5 psig or less than ±5 psig, the transducer will be considered out of range and will not calibrate.

4. Press on the HSIO keypad. This automatically ap-

plies the proper correction factor to all future inputs from the transducer.

Three pressure transducers are mounted on each lead com- pressor: 2 low-pressure transducers to monitor compressor suction pressure and oil pressure, and a high-pressure trans- ducer to monitor compressor discharge pressure (see Fig. 17 for exact locations on compressor). Each transducer is supplied with 5 vdc power from a recti®er which changes 24 vac to 5 vdc.

TROUBLESHOOTING Ð If transducer is suspected of be- ing faulty, ®rst check supply voltage to transducer. Supply voltage should be 5 vdc ± .2 v. If supply voltage is correct, compare pressure reading displayed on keypad and display module against pressure shown on a calibrated pressure gage. If the 2 pressure readings are not reasonably close, replace pressure transducer.

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Contents Controls, Operation, Troubleshooting Unit Sizes and Modular Combinations Unit Model Nominal Section a Section BTons Unit 30GN 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 TransducersÐ Capacity Control Steps Loading Sequence a Loading Sequence B Unit ControlSteps Ð Capacity Control Steps, 040-070 Ð Capacity Control Steps, 040-070 Displacement Compressors Approx 080, 230B 60 Hz A1²,B1²A1²**, B1² A1²**,B1²Compressors Displacement 090, 245B 60 Hz090, 245B 50 Hz 100, 255B 270B 60 HzUnit Control Loading Sequence a Loading Sequence B 270B 50 Hz110, 290B 315B 60 Hz315B 50 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 TimeExample 1 Ð Reading Alarm Codes Example 2 Ð Reading Current Operating ModesKeypad Display Comments Entry Response 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-CCNCpcs FSMWSM 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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