Carrier 30GN040-420 operating instructions Cgf

Page 53

 

LEGEND

 

CB

Ð Circuit Breaker

 

CGF

Ð

Ground Fault Module

 

COMM

Ð Communications Bus

 

CR

Ð Compressor Contactor Relay

 

DSIO

Ð

Relay Module (Low Voltage)

*And associated modular units.

HPS

Ð

High-Pressure Switch

 

LV

Ð

Low Voltage

 

PL

Ð

Plug

 

SNB

Ð

Snubber

 

TB

Ð

Terminal Block

 

TRAN

Ð

Transformer

 

U

Ð Unloader

 

Fig. 11C Ð 24-V Safety Circuit Wiring (130-210 and Associated Modular Units)

Loss of communication can be attributed to a grounded transformer with a secondary voltage of 21 vac supplying the PSIO, DSIO-LV, or 4 IN/4 OUT; the 12.5-vac trans- former supplying the DSIO-EXV module, or the 24-vac trans- former supplying PS1 for the transformers. These transformers should not be grounded, or serious damage to controls can result. Check to be sure the transformers are not grounded.

Code 36 Low refrigerant pressure, Circuit A (alert) Code 37 Low refrigerant pressure, Circuit B (alert)

If suction pressure transducer senses a pressure below set point for more than 5 minutes at start-up or more than 2 minutes during normal operation, affected circuit shuts down without going through the pumpout process. Reset is auto- matic when pressure reaches 10 psig above set point if there have been no previous occurrences of this fault on the same day. If this is a repeat occurrence on same day, then reset is manual, with LOCAL/ENABLE-STOP-CCN switch. Fac- tory con®gured set point is 27 psig for standard chillers and 12 psig for brine chillers.

Possible causes of fault are low refrigerant charge, faulty EXV, plugged ®lter drier, or faulty transducer.

Code 38 Failure to pump out, Circuit A (alert) Code 39 Failure to pump out, Circuit B (alert)

The pumpout process is terminated when saturated suc- tion temperature is 10° F (5.6° C) below temperature at be- ginning of pumpout, or 10° F (5.6° C) below leaving water temperature or reaches a saturated suction temperature of ±15 F (±26 C). If appropriate saturated suction temperature is not met within 3 minutes (on 2 consecutive tries), circuit shuts down without pumpout. Reset is manual with LOCAL/ ENABLE-STOP-CCN switch, and start-up follows normal sequence.

Possible causes for this alarm are a bad thermistor or trans- ducer or a faulty expansion valve.

Code 40 Low oil pressure, Circuit A (alert) Code 41 Low oil pressure, Circuit B (alert)

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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 LOCAL/ENABLE-STOP-CCN Switch Positions and OperationKeypad and Display Module Also Called Hsio StopThermistor and Transducer Locations Compressor Protection Control Module CpcsThermistors 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 A1²,B1² Displacement Compressors Approx 080, 230B 60 HzA1²**, B1² A1²**,B1²090, 245B 50 Hz Compressors Displacement090, 245B 60 Hz 270B 60 Hz 100, 255B270B 50 Hz Unit Control Loading Sequence a Loading Sequence B315B 50 Hz 110, 290B315B 60 Hz A1*,A2,B1 A1,A2,B1 A1²²,A2,B1,B2 A1*,A2,B1,B2 130 60 Hz 150, 230A, 245A 130 50 HzA1,kB1 330A/B 60 Hz 170, 270A330A/B,360B 50 Hz 330A/B, 360B 50 Hz 390B 60 Hz Approx 190, 290A, 360A/BA1,B1 A1**,B1420A/B 60 Hz 210, 315A, 390A420A/B 50 Hz Pumpout Head Pressure ControlFAN Arrangement FAN Numbers FAN Contactor Controlled by Condenser Fan SequenceFunctions and Subfunctions Keypad and Display Module UsageFunction USE Keys Operative USE KeysKeypad Directory Accessing Functions and SubfunctionsKeypad Directory Status TemperatureSubfunction Keypad Entry Display Comment Stage SET PointAnalog Subfunction Keypad Entry Display Comment PressureInputs OutputsSubfunction Keypad Entry Display Comment Outputs Subfunction Keypad Entry Display CommentSubfunction Keypad Entry Display Comment Compressors Unloaders CPA1Keypad Directory Test Keypad Directory Schedule Configuration Keypad Directory ServiceService Subfunction Keypad Entry Display Comment FactorySubfunction Keypad Entry Display Comment RUN Time ALARM/ALERTStarts HISTORY²²Subfunction Keypad Entry Display Comment SET Points Reset 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 Reset Set Points Example 3 Ð Using Test FunctionReset Amounts Example 5A Ð External ResetExample 4 Ð Reading and Changing Chilled Fluid Set Point Measurement Method Input Data DescriptionKeypad Display Comments Entry Response Example 5C Ð Using Return Fluid Temperature ResetSwitch PowerComm Ð Communications Bus PWRPassword Service FunctionsSUB Keypad Display Comment LoggedonExample 8 Ð Setting Time of Day Day of Week To Disable Demand Limit4-20 mA Demand Limiting Factory Conguration Keystrokes Adjustable Field CongurationsKeypad Display Comment Entry Example 9 Ð Using the Schedule FunctionProgramming Period Keypad Display Comment Entry Programming PeriodEnter Display Example 10 Ð Holiday Schedule FunctionStop position. Unit cannot start if these contacts are Typical Stoppage Faults and Reset TypesLOCAL/ENABLE-STOP-CCN Alarm and Alert CodesWSM CpcsFSM DGT COM, CommDsio 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 Control Modules Module Address Selector Switch LocationsAccessory Unloader Installation 4 In/4 Out Module SIO InstallationStandard and Accessory Unloaders TroubleshootingPage ²Or HGBPR-B Or HGBPR-AHgbpr Ð COMOutdoor-Air Temperature Externally PoweredCWP Ð Chilled Water Fluid Pump TB Ð Terminal BlockInterlocks Remote AlarmPage 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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