Carrier 30GN040-420 operating instructions Accessory Unloader Installation

Page 64

Fig. 19 Ð Sensor Bus Wiring

(Communications)

PROCESSOR MODULE (PSIO) (Fig. 20)

Inputs Ð Each input channel has 3 terminals; only 2 of the terminals are used. Application of machine determines which terminals are used. Always refer to individual unit wiring for terminal numbers.

Outputs Ð Output is 24 vdc. There are 3 terminals, only 2 of which are used, depending on application. Refer to unit wiring diagram.

NOTE: Address switches (see Fig. 20) must be set at 01 (dif- ferent when CCN connected).

LOW VOLTAGE RELAY MODULE (DSIO-LV) (Fig. 21)

Inputs Ð Inputs on strip J3 are discrete inputs (ON/OFF). When 24-vac power is applied across the 2 terminals in a channel it reads as on signal. Zero v reads as an off signal.

Outputs Ð Terminal strips J4 and J5 are internal relays whose coils are powered-up and powered-off by a signal from microprocessor. The relays switch the circuit to which they are connected. No power is supplied to these connections by DSIO module.

4 IN/4 OUT MODULE (SIO) (Fig. 22) Ð 4 In/4 Out mod- ule allows the following features to be utilized:

1.Temperature Reset by outdoor air or space temperature. A remote thermistor (Part No. 30GB660002) is also re- quired.

NOTE: This accessory is not required for return water temperature reset.

2.Temperature Reset by remote 4 to 20 mA signal.

3.Demand Limit by remote 2-stage switch.

4.Demand Limit by remote 4 to 20 mA signal

5.Dual Set Point by remote switch.

The options module is standard. Remember to recon®g- ure the chiller for each feature selected (see Table 14). For temperature reset, demand limit, and dual set point, desired set points must be entered through keypad and display mod- ule (see Set Point Function section on page 38).

See Table 19 for overall troubleshooting information.

ACCESSORY UNLOADER INSTALLATION

Some of the 30G Flotronic™ II units come standard with unloader(s), and many permit additional unloader(s) to be added if desired. See Table 20.

IMPORTANT: The following combinations ARE NOT permitted (combinations are per circuit):

1.Two unloaders and hot gas bypass

2.Four compressors and 2 unloaders.

3.Four compressors, 1 unloader, and hot gas bypass.

PWR Ð Power

Fig. 20 Ð Processor Module (PSIO)

 

 

LEGEND

COMM

Ð

Communications Bus

NO Ð Normally Open

NC

Ð

Normally Closed

PWR Ð Power

Fig. 21 Ð Low-Voltage Relay Module (DSIO)

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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 LOCAL/ENABLE-STOP-CCN Switch Positions and Operation LOCAL/ENABLEKeypad and Display Module Also Called Hsio StopCompressor Protection Control Module Cpcs Thermistor and Transducer LocationsThermistors Pressure TransducersLoading Sequence a Loading Sequence B Unit Control Ð Capacity Control StepsSteps Ð Capacity Control Steps, 040-070 Ð Capacity Control Steps, 040-070 Displacement Compressors Approx 080, 230B 60 Hz A1²,B1²A1²**, B1² A1²**,B1²090, 245B 60 Hz Compressors Displacement090, 245B 50 Hz 100, 255B 270B 60 HzUnit Control Loading Sequence a Loading Sequence B 270B 50 Hz315B 60 Hz 110, 290B315B 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 Approx 190, 290A, 360A/B 390B 60 HzA1,B1 A1**,B1210, 315A, 390A 420A/B 60 Hz420A/B 50 Hz Head Pressure Control PumpoutCondenser Fan Sequence FAN Arrangement FAN Numbers FAN Contactor Controlled byKeypad and Display Module Usage Functions and SubfunctionsFunction USE Keys Operative USE KeysAccessing Functions and Subfunctions Keypad DirectoryTemperature Keypad Directory StatusSubfunction Keypad Entry Display Comment Stage SET PointSubfunction Keypad Entry Display Comment Pressure AnalogInputs OutputsSubfunction Keypad Entry Display Comment Subfunction Keypad Entry Display Comment OutputsSubfunction Keypad Entry Display Comment Compressors Unloaders CPA1Keypad Directory Test Keypad Directory Schedule Keypad Directory Service ConfigurationService Subfunction Keypad Entry Display Comment FactoryALARM/ALERT Subfunction Keypad Entry Display Comment RUN TimeStarts HISTORY²²Reset SET Points Subfunction Keypad Entry Display Comment SET PointsDemand SET Points Date and TimeExample 2 Ð Reading Current Operating Modes Example 1 Ð Reading Alarm CodesKeypad Display Comments Entry Response Operational and Mode Display Codes Example 3 Ð Using Test Function Reset Set PointsExample 5A Ð External Reset Reset AmountsExample 4 Ð Reading and Changing Chilled Fluid Set Point Measurement Method Input Data DescriptionExample 5C Ð Using Return Fluid Temperature Reset Keypad Display Comments Entry ResponsePower SwitchComm Ð Communications Bus PWRService Functions PasswordSUB Keypad Display Comment LoggedonTo Disable Demand Limit Example 8 Ð Setting Time of Day Day of Week4-20 mA Demand Limiting Adjustable Field Congurations Factory Conguration KeystrokesExample 9 Ð Using the Schedule Function Keypad Display Comment EntryProgramming Period 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-CCNFSM CpcsWSM COM, Comm DGTDsio 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 Or HGBPR-A ²Or HGBPR-BHgbpr Ð COMExternally Powered Outdoor-Air TemperatureCWP Ð Chilled Water Fluid Pump 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.
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