Carrier 30GN040-420 To Disable Demand Limit, Example 8 Ð Setting Time of Day Day of Week

Page 43

At ®eld con®guration step, select 4 to 20 mA loadshed

by entering (internally powered) or (externally pow-

ered) when the LSTYP 0 display appears. See Example 7B. Then enter set points as follows. In this example, set points are coordinates of the demand limit curve shown in Fig. 9.

Example 7A Ð Using Demand Limit (First Log On as Shown in Table 12)

KEYPAD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

FLD CFG

Field con®guration sub-

 

function of service function

 

 

 

LSTYP 0

Loadshed is not enabled

 

LSTYP 1

Loadshed is now enabled

 

for 2-stage switch control

 

 

 

 

Demand Limit set points

 

DEMAND

subfunction of set point

 

 

function

 

DLS1 80

Loadshed 1 currently set

 

at 80%

 

 

 

DLS1 60

Loadshed reset to 60%

 

DLS2 50

Loadshed 2 currently set

 

at 50%

 

 

 

DLS2 40

Loadshed 2 reset to 40%

 

 

 

To Disable Demand Limit:

KEYPAD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

 

 

 

FLD CFG

Field con®guration sub-

 

function of service function

 

 

 

ERTYP 0

Scroll past other elements

 

in the subfunction

 

 

 

LSTYP 1

Loadshed is enabled for

 

2-stage switch control

 

 

 

LSTYP 0

Loadshed is now disabled

 

 

 

NOTES:

1.Select 2 for internally powered 4 to 20 mA signal load limiting.

2.Select 3 for Carrier Comfort Network loadshed.

3.Select 4 for externally powered 4 to 20 mA signal load limiting.

Example 7B Ð Using Demand Limit (4-20 mA)

(First Log On As Shown in Table 12)

KEYPAD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

 

 

 

FLD CFG

Field con®guration subfunction

 

of service function

 

 

 

ERTYP 0

Scroll past other elements in

 

the subfunction

 

 

 

LSTYP 0

Loadshed is not enabled

 

 

Loadshed is now enabled

 

LSTYP 2

for 4-20 mA internally-powered

 

 

signal control

 

DEMAND

Demand Limit set points

 

DL20 100

Maximum demand limit is 100%

 

DL20 90

Maximum demand limit is 90%

 

 

 

Scrolling past the 4 to 20 mA demand limit set point brings up the loadshed set points. The loadshed feature is activated by a redline alert and loadshed commands from the CCN loadshed option. The ®rst set point is the group number, es- tablished by the CCN system designer. The second option is

the loadshed demand delta, which de®nes the percent of the load to be removed when a loadshed command is in effect. The third set point is maximum loadshed time, which de- ®nes the maximum length of time that a loadshed condition is allowed to exist. The allowable range for this entry is zero to 120 minutes.

Subfunction displays date, time, and day of the week.

Reading and Changing Time Display Ð Time is entered and displayed in 24-hour time. The day of the week is entered as a number.

1 = Mon, 2 = Tue, 7 = Sun, etc.

Key is used as the colon when entering time. See Example 8.

subfunction accesses the leaving chiller ¯uid alert

limit (LMT) option. The value to be entered here is the num- ber of degrees above the control set point at which an alert should be generated. For example, if the control set point is 44 F, and an alert is desired (alert 70) if the ¯uid temperature reaches 50 F, then enter 6 for this set point. The allowable range for this entry is between 2 and 30 (F).

SERVICE FUNCTION Ð This function allows the techni- cian to view and input con®guration data. Factory con®gu- ration data, ®eld con®guration data, and service con®gura- tion data may be viewed or entered through the keypad and display module. See Table 9 for a complete listing of con- ®gurable items. Whenever a processor module is replaced in the ®eld, the complete list of con®guration codes must be entered.

Logging On/Logging Off Ð The service function is pass- word protected. Therefore, to gain entry to this function,

this password must be entered. Pressing

allows the technician to view, change, or enter con®guration codes. To log off, perform the following keystrokes:

. The service function is once again password protected.

Software Information Ð displays the version

number of the software that resides in the processor

module. The and subfunctions are summa- rized in Table 12.

Example 8 Ð Setting Time of Day and

Day of Week

KEYPAD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

 

 

 

 

Time display sub-

 

TIME

function of set point

 

 

function

 

MON 16.00

Current setting is

 

Monday, 4:00 p.m.

 

 

 

 

New setting of

 

TUE 13.05

Tuesday, 1:05 p.m.

 

is entered

 

 

 

 

and displayed

 

JAN 01 90

Current date is

 

Jan. 1, 1990

 

 

 

 

New setting

 

APR 15 90

April 15, 1990

 

is entered

 

 

 

 

and displayed

 

 

 

43

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Contents Controls, Operation, Troubleshooting Unit Model Nominal Section a Section B Unit Sizes and Modular CombinationsTons Unit 30GN 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 ThermistorsLoading Sequence a Loading Sequence B Unit Control Ð Capacity Control StepsSteps 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 60 Hz Compressors Displacement090, 245B 50 Hz 270B 60 Hz 100, 255B270B 50 Hz Unit Control Loading Sequence a Loading Sequence B315B 60 Hz 110, 290B315B 50 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 PointsExample 2 Ð Reading Current Operating Modes Example 1 Ð Reading Alarm CodesKeypad Display Comments Entry Response 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 CodesFSM CpcsWSM 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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