Carrier 30GN040-420 operating instructions

Page 67

5.Using test function, check unloaders. Press . Key-

pad display reads OUTPUTS. Press until display

reads UNA2 OFF. Press . Relay energizes. Press and relay deenergizes. Press until display reads

UNB2 OFF. Press . Relay energizes. Press and relay deenergizes.

6.When unloader check has been performed, return LOCAL/ ENABLE-STOP-CCN to proper position. Close and se- cure control box door.

130 (50 Hz), 150-210 UNITS (And Associated Modular Units)

1.Install control wiring. The minimum wire size for instal- lation is 16 AWG (American Wire Gage). Refer to Fig. 23 and 24 for proper wiring. Open the control box door. Locate unloader relays A and B (UA, UB) in place of the hot gas bypass relays as shown on the component arrangement diagram on the unit. Mount the relays with the ®eld-supplied screws. Be careful not to damage the components and wiring in the area when mounting the relays.

2.Wire the control side. Wire the UA coil in series between J6-18 and J6-19 of the 4 IN/4 OUT module with the wires provided. Wire the UB coil in series between J6-21 and J6-22 of the same module with the wires provided.

Locate the black wire in the control harness originating from TRAN5 labeled HGBPR-A-COM. Connect this wire to the UA terminal COM. Connect the wire labeled HGBPR- A-NO to UA-NO. Connect the wire from UA-NO to TB3-5. For an extra unloader on circuit B, connect the wire labeled HGBPR-B-COM to UR-B-COM, and the wire labeled HGBPR-B-NO to UB-NO. Connect the wire from UB-NO to TB3-6.

3.Wire in the solenoid valves.

NOTE: Wires external to the control box must be run in conduit.

Terminal blocks are provided for easy ®eld wiring. Use one of the isolated 7¤8-in. (22-mm) holes in the side of the compressor electrical box with a strain relief to run the wires to the solenoid coil. Connect UA between TB3-5 and TB3-8. Connect UB between TB3-6 and TB3-8. Check all of the electrical connections for proper location and tightness, and replace and secure the electrical box of the compressor.

4.Con®gure the microprocessor. Once the relays are mounted in the control box, the microprocessor must be con®g- ured for the unloader option. To do so:

a.Be sure the LOCAL/ENABLE-STOP-CCN switch is in the STOP position.

b. Log into the processor and enter the service func- tion using the keypad and display module.

Press

. The keypad LCD will display

``PASSWORD.'' Enter , and the keypad LCD will display ``LOGGEDON.''

c.To change the con®guration, press , and the keypad LCD will display ``FLD CFG.'' Press

until either ``NULA 0'' or ``NULA 1'' is displayed (depending on the number of unloaders provided as

standard). Then press (for 1 unloader on A1)

or (for 2 unloaders on compressor A1). The display will now read either ``NULA 1'' or

``NULA 2,'' as appropriate. Press to get to the NULB display, and change this setting in the same man- ner as with circuit A.

d.Once the con®guration is complete, press , and the keypad LCD will display ``LOGGEDON,''

Press until the keypad LCD display reads ``LOG

OFF.'' Press and the keypad LCD will display ``EXIT LOG.''

5.Once the unloader heads are installed, the unit is checked for leaks, and the system is prepared for operation per the instructions for the compressor unloader head installa- tion, check the output of the relays using the test function as follows:

a.Press , and the display will read ``COMP.''

b.Press the to scroll down until the display reads ``CPA1 OFF.''

c.Press , and the compressor should start.

d.Press , and the compressor should stop.

e.Press until the display reads ``UNA1 OFF.''

f.Press , and the solenoid should energize.

g. Press

and the solenoid should deenergize.

h.Use the and keys to check the remainder of the unloader coils.

6.Once the check has been performed, return the LOCAL/ ENABLE-STOP-CCN switch to the proper position.

7.Close and secure the control box door.

8.Start the unit and con®rm that the chiller operates properly.

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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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