Carrier 30GN040-420 Service Functions, SUB Keypad Display Comment, Password, Loggedon

Page 42

Fig. 8 Ð 4-20 mA Cooling Temperature Reset

Example 6 Ð Changing Reset Type

To change type of reset, ®rst log on as shown in Table 12. Also refer to Set Point Function section, page 38, for information on entering reset set points using reset feature.

KEYPAD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

 

 

 

 

Field con®guration

 

FLD CFG

subfunction of

 

 

service function

 

CSPTYP 0

Scroll past single cooling

 

set point

 

 

 

CRTYP 0

No reset has been

 

selected

 

 

 

CRTYP 1

Internally powered 4-20 mA

 

signal reset is selected

 

 

 

 

Space or outdoor-air

 

CRTYP 2

temperature reset is

 

 

selected

 

CRTYP 3

Return ¯uid temperature

 

reset is selected

 

 

 

CRTYP 4

Externally powered 4-20 mA

 

signal reset is selected

 

 

 

CRTYP 0

Reset is deactivated

 

 

 

To use Demand Limit, ®rst enable loadshed, then enter demand limit set points. See Example 7A. Closing the ®rst stage demand limit contact puts unit on the ®rst demand limit level, that is, the unit does not exceed the percentage of ca- pacity entered as demand limit stage 1. Closing contacts on second-stage demand limit relay prevents unit from exceed- ing capacity entered as demand limit stage 2. The demand limit stage that is set to the lowest demand takes priority if both demand limit inputs are closed.

The demand limit function must be enabled in order to function and may be turned off when its operation is not de- sired. The demand limit relays can, in off condition, remain connected without affecting machine operation.

Table 12 Ð Service Functions

To view and modify con®gurations, the password must be entered under the log on subfunction.

SUB-

KEYPAD

DISPLAY

COMMENT

FUNCTION

ENTRY

 

 

 

 

 

 

1 Log On

 

PASSWORD

Enter Password/

 

 

 

Disable Password

 

 

LOGGEDON

Logged On

 

 

 

 

NOTE: Con®gurations may be modi®ed at this time. When ®nished viewing and/or modifying con®gurations, log out as follows:

 

 

LOGGEDON

Ð

 

 

LOG OFF

Disable Password

 

 

Protection

 

 

 

 

 

 

Logged Off/

 

 

EXIT LOG

Enable Password

 

 

 

Protection

 

 

 

 

2 Version

 

VERSION

Software

 

 

Information

 

 

 

 

 

XXXXXXXX

Version No.

 

 

of Software

 

 

 

 

 

 

 

Demand Limit, 4 to 20 mA Signal Ð The controls can also accept a 4 to 20 mA signal for load shedding. Input for the signal are terminals shown below:

Externally powered

Positive lead to J7-5 - 4 In/4 Out Module

Negative lead to J7-6 - 4 In/4 Out Module

Internally powered

Positive lead to J7-6 - 4 In/4 Out Module Negative lead to J7-7 - 4 In/4 Out Module

See Field Wiring section on page 69 and Fig. 7.

42

Page 41 Page 43
Image 42
Page 41 Page 43
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 Keypad and Display Module Also Called Hsio LOCAL/ENABLE-STOP-CCN Switch Positions and OperationLOCAL/ENABLE StopThermistors Compressor Protection Control Module CpcsThermistor and Transducer Locations 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 A1²**, B1² Displacement Compressors Approx 080, 230B 60 HzA1²,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 A1,B1 Approx 190, 290A, 360A/B390B 60 Hz A1**,B1210, 315A, 390A 420A/B 60 Hz420A/B 50 Hz Head Pressure Control PumpoutCondenser Fan Sequence FAN Arrangement FAN Numbers FAN Contactor Controlled byFunction USE Keys Keypad and Display Module UsageFunctions and Subfunctions Operative USE KeysAccessing Functions and Subfunctions Keypad DirectorySubfunction Keypad Entry Display Comment Stage TemperatureKeypad Directory Status SET PointInputs Subfunction Keypad Entry Display Comment PressureAnalog OutputsSubfunction Keypad Entry Display Comment Compressors Subfunction Keypad Entry Display CommentSubfunction Keypad Entry Display Comment Outputs Unloaders CPA1Keypad Directory Test Keypad Directory Schedule Service Keypad Directory ServiceConfiguration Subfunction Keypad Entry Display Comment FactoryStarts ALARM/ALERTSubfunction Keypad Entry Display Comment RUN Time HISTORY²²Demand SET Points Reset SET PointsSubfunction Keypad Entry Display Comment 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 4 Ð Reading and Changing Chilled Fluid Set Point Example 5A Ð External ResetReset Amounts Measurement Method Input Data DescriptionExample 5C Ð Using Return Fluid Temperature Reset Keypad Display Comments Entry ResponseComm Ð Communications Bus PowerSwitch PWRSUB Keypad Display Comment Service FunctionsPassword LoggedonTo Disable Demand Limit Example 8 Ð Setting Time of Day Day of Week4-20 mA Demand Limiting Adjustable Field Congurations Factory Conguration KeystrokesProgramming Period Example 9 Ð Using the Schedule FunctionKeypad Display Comment Entry 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 Dsio COM, CommDGT 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 Hgbpr Ð Or HGBPR-A²Or HGBPR-B COMCWP Ð Chilled Water Fluid Pump Externally PoweredOutdoor-Air Temperature 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.
Top Page Image Contents