Carrier 30GN040-420 operating instructions Example 10 Ð Holiday Schedule Function, Enter Display

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Periods 4 and 5 can be programmed in the same manner, ¯agging Thursday and Friday yes for period 4 and Saturday yes for period 5. For this example, periods 6, 7, and 8 are not used: they should be programmed OCC 00.00, UNO 00.00.

NOTE: When a day is ¯agged yes for 2 overlapping periods, occupied time will take precedence over unoccupied time. Occupied times can overlap in the schedule with no consequence.

To extend an occupied mode beyond its normal termina- tion for a one-time schedule override, program as shown below:

 

 

Override is set for 0. Enter

 

OVRD 0

the number of hours of

 

 

override desired

 

 

Unit will now remain in

 

OVRD 3

occupied mode for

 

 

an additional 3 hours

 

 

 

Holiday Schedule Ð Press to schedule up to

30 holiday periods. All holidays are entered with numerical values. First, the month (01 to 12), then the day (01 to 31), then the duration of the holiday period in days.

Examples: July 04 is 07.04.01. Dec 25 - 26 is 12.25.02

If any of the 30 holiday periods are not used, the display shows NEW.

See Example 10.

Example 10 Ð Holiday Schedule Function

ENTER

DISPLAY

 

 

 

HOLIDAY

 

JAN01 02 (Includes Jan 1st

 

and 2nd)

 

APR17 01 (Includes April 17th)

 

MAY21 01(Includes May 21st)

 

JUL03 01 (Includes July 3rd)

 

JUL04 01 (Includes July 4th)

 

SEP07 01 (Includes Sep. 7th)

 

NOV26 02 (Includes Nov. 26th

 

and 27th)

 

DEC24 02 (Includes Dec. 24th

 

and 25th)

 

DEC30 02 (Includes Dec. 30th

 

and 31st)

 

NEW

 

MAY25 01 (Includes May 25th)

 

NEW

 

NEW

 

NEW

 

NEW

 

NEW (30TH HOLIDAY)

 

 

NEW indicates a holiday that has not been assigned yet.

Fig. 10 Ð Sample Time Schedule

TROUBLESHOOTING

The Flotronic™ II control has many features to aid the technicians in troubleshooting a Flotronic II Chiller. By us- ing the keypad and display module and the status function, actual operating conditions of the chiller are displayed while unit is running. Test function allows proper operation of com- pressors, compressor unloaders, fans, EXVs and other com- ponents to be checked while chiller is stopped. Service func- tion displays how con®gurable items are con®gured. If an operating fault is detected, an alarm is generated and an

alarm code(s) is displayed under the subfunction ,

along with an explanation of the fault. Up to 10 current alarm codes are stored under this subfunction. For checking spe- ci®c items, see Table 9.

Checking Display Codes Ð To determine how ma- chine has been programmed to operate, check diagnostic

information ( ) and operating mode displays ( ).

If no display appears, follow procedures in Control Modules section on page 63. If display is working, continue as follows:

1.Note all alarm codes displayed, .

2.Note all operating mode codes displayed, .

3.Note leaving chilled water temperature set point in ef-

fect and current leaving water temperature, .

If machine is running, compare the ``in effect'' leaving water temperature set point with current water tempera- ture. Remember, if reset is in effect, the values may be different because machine is operating to the modi®ed chilled water set point. If current temperature is equal to set point, but set point is not the one desired, remember that if dual set point has been selected in the schedule function, there are 2 set points to which the machine can be operating. Check the programming of schedule function to see if oc- cupied or unoccupied set point should be in effect.

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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 Stop LOCAL/ENABLE-STOP-CCN Switch Positions and OperationLOCAL/ENABLE Keypad and Display Module Also Called HsioPressure Transducers Compressor Protection Control Module CpcsThermistor and Transducer Locations ThermistorsSteps 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 A1**,B1 Approx 190, 290A, 360A/B390B 60 Hz A1,B1420A/B 60 Hz 210, 315A, 390A420A/B 50 Hz Pumpout Head Pressure ControlFAN Arrangement FAN Numbers FAN Contactor Controlled by Condenser Fan SequenceOperative USE Keys Keypad and Display Module UsageFunctions and Subfunctions Function USE KeysKeypad Directory Accessing Functions and SubfunctionsSET Point TemperatureKeypad Directory Status Subfunction Keypad Entry Display Comment StageOutputs Subfunction Keypad Entry Display Comment PressureAnalog InputsUnloaders CPA1 Subfunction Keypad Entry Display CommentSubfunction Keypad Entry Display Comment Outputs Subfunction Keypad Entry Display Comment CompressorsKeypad Directory Test Keypad Directory Schedule Subfunction Keypad Entry Display Comment Factory Keypad Directory ServiceConfiguration ServiceHISTORY²² ALARM/ALERTSubfunction Keypad Entry Display Comment RUN Time StartsDate and Time Reset SET PointsSubfunction Keypad Entry Display Comment SET Points Demand SET PointsKeypad 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 FunctionMeasurement Method Input Data Description Example 5A Ð External ResetReset Amounts Example 4 Ð Reading and Changing Chilled Fluid Set PointKeypad Display Comments Entry Response Example 5C Ð Using Return Fluid Temperature ResetPWR PowerSwitch Comm Ð Communications BusLoggedon Service FunctionsPassword SUB Keypad Display CommentExample 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 Programming Period Example 9 Ð Using the Schedule FunctionKeypad 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 HPS COM, CommDGT DsioComm 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 COM Or HGBPR-A²Or HGBPR-B Hgbpr ÐTB Ð Terminal Block Externally PoweredOutdoor-Air Temperature CWP Ð Chilled Water Fluid PumpInterlocks 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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