Carrier 040-420 specifications Unit Sizes and Modular Combinations, Unit Model

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GENERAL

IMPORTANT: This publication contains controls, op -

eration and troubleshooting data for 3OGNO40-420 and 30GT225, 250, and 280 FlotronicTM II chillers,

Circuits are identified as circuits A and B, and com- pressors are identified as Al, A2, etc. in circuit A, and BI, B2, etc. in circuit B.

Use this guide in conjunction with separate Instal- lation Instructions booklet packaged with the unit,

The 30G Series standard Flotronic II chillers feature microprocessor-based electronic controls and an electronic expansion valve (EXV) in each refrigeration circuit.

NOTE: The 30GN040 and 045 chillers with a factory- installed brine option have thermal expansion valves (TXV) instead of the EXV.

Unit sizes 240,270, and 300-420 are modular units which are shipped as separate sections (modules A and B). Instal- lation instructions specific to these units are shipped inside the individual modules. See Table 1 for a listing of unit sizes and modular combinations. For modules 24OB and 270B, follow all general instructions as noted for unit sizes OSO-

110.For all remaining modules, follow instructions for unit sizes 130-210.

Table 1 - Unit Sizes and Modular Combinations

UNIT MODEL

NoT”o’NNs”L

SE\WlK&N

ssE%~N

 

 

 

 

 

 

 

 

 

30G NO40

40

 

-

 

 

3OG NO45

4 5

-

 

30GN050

50

-

-

 

-

30EN060

6 0

-

 

 

30GN070

70

-

 

 

 

30GN080

8 0

-

-

 

 

 

 

 

 

 

 

 

 

 

30GNlfO

 

160

 

 

-

 

 

-

 

 

 

 

 

 

 

30GN190

 

180

 

 

-

 

 

-

30GN210

1

200

 

I

-

I

 

-

 

 

 

30GT225

 

2 2 5

 

 

-

 

 

 

30GN240

 

2 2 5

 

 

30GN130

 

 

30GNlOO

30GT250

 

2 5 0

 

 

-

 

 

-

30GN270

 

260

 

 

30QN170

 

 

30GNi 00

30GT280

1

2 8 0

 

1

-

I

 

-

 

 

 

 

 

 

 

30GN300...---

1

285

 

1 30GNi 3 0

 

1

3 0 G N f 70

30GN330

 

3 2 5

 

 

30GNl70

 

 

30GN170

30GN360

 

3 5 0

 

 

30GN190

3 0 G N f 90/30GN170*

30GN390

 

3 8 0

 

 

30GN210

 

 

30GN190

30GN420

 

400

 

 

30GN210

 

 

30GN210

 

 

 

 

 

 

 

 

 

*60 Hz units/50 Hz units.

The Flotronic II control system cycles compressor un- loaders and/or compressors to maintain the selected leaving water temperature set point. It automatically positions the EXV to maintain the specified refrigerant superheat enter- ing the compressor cylinders. It also cycles condenser fans on and off to maintain suitable head pressure for each cir- cuit. Safeties are continuously monitored to prevent the unit from operating under unsafe conditions. A scheduling func- tion, programmed by the user, controls the unit occupied/ unoccupied schedule. The control also operates a test pro- gram that allows the operator to check output signals and ensure components are operable.

The contrwsm consists of a processor module (PSIO)9 a low-voltage relay module (DSIO-LV), 2 EXVs, an EXV

driver module (DSIO-EXV), a 6-pack relay board, a key- pad and display module (also called HSIO or LID), ther- mistors, and transducers to provide inputs to the microprocessor. An options module (SIO) is used to pro- vide additional functions. This module is standard on 30GN modules and is a field-installed accessory on the 30GT Flo- tronic II units. See Fig. 1.

MAJOR SYSTEM COMPONENTS

Processor Module - This module contains the oper- ating software and controls the operation of the machine. It continuously monitors information received from the vari- ous transducers and thermistors and communicates with the relay modules and &pack relay board to increase or de- crease the active stages of capacity. The processor module also controls the EXV driver module, commanding it to open or close each EXV in order to maintain the proper super- heat entering the cylinders of each lead compressor. Infor- mation is transmitted between the processor module and re- lay module, the EXV driver module, and the keypad and display module through a 3-wire communications bus. When used, the options module is also connected to the commu- nications bus .

For the Flotronic II chillers, the processor monitors sys- tem pressure by means of 6 transducers, 3 in each lead com- pressor. Compressor suction pressure, discharge pressure, and oil pressure are sensed. If the processor senses high discharge pressure or low suction pressure, it immediately shuts down all compressors in the affected circuit. During operation, if low oil pressure is sensed for longer than one minute, all compressors in the affected circuit are shut down. At start-up, the coil pressure signal is ignored for 2 min- utes. If shutdown occurs due to any of these pressure faults, the circuit is locked out and the appropriate fault code is displayed.

Low-Voltage Relay Module - This module closes contacts to energize compressor unloaders and/or compres- sors. It also senses the status of the safeties for all compres- sors and transmits this information to the processor.

Electronic Expansion Valve Module - This mod- ule receives signals from the processor and operates the elec- tronic expansion valves.

Options Module - This module allows the use of Flo- tronic II features such as dual set point, remote reset, de- mand limit, hot gas bypass, and accessory unloaders. The options module also aIlows for reset and demand limit to be activated from a remote 4-20 mA signal. The options mod- ule is installed at the factory on 040-210 and modular 240- 420 units. It is a field-installed accessory for 225, 250 and 280 units.

Keypad and Display Module (also called HSlO or LID) - This device consists of a keypad with 6 func- tion keys, 5 operative keys, 12 numeric keys, and an al- phanumeric g-character LCD. Key usage is explained in Accessing Functions and Subfunctions section on page 28.

Control Switch - Control of the chiller is defined by the position of the LOCAL/ENABLE-STOP-CCN switch. This is a 3-position manual switch that allows the chiller to

be put under the control of its own Flotronic II controls, ,,

manually stopped, or put under the control of a Carrier Corn- :f

fort Network (CCN), Switch allows unit operation as shown c ’ _. ’ in Table 2.

2

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Contents Contrc Unit Sizes and Modular Combinations Unit ModelRELAY, B Keypaddisplay Ground Fault InterrupterSource PSI FieldThermistor and Transducer Locations LOCAL/ENABLE-STOP-CCN Switch Positions and OperationCompressor Protection Control Module Cpcs ThermistorsLoading Sequence a Loading Sequence B Unit Control CapacityControl Steps StepsLoading Sequence a Loading Sequence B Unit Capacity Control Steps, 040-070 cant060A\~**Hz FBI Capacity Control Steps, 040-070 cantOy&ya A4l&pi’ Aiti08Aqy,y Steps BP’Loading Loading Sequence B Unit Control Altt Altt BittWtf2Z$’ Loading Sequence a Loading Equence B Unit$-t&Z3 Amrox’tt Alt,Blv Displacement Compressors UWrW Arwox A2.p $#l 110 50 HzLoading Sequence a Quence B Unit Control Equence B Displacement Compressors MvroxLoading Equence a 130,24OA Awrox Drt,t130, 24OA 130, 240AAttll’ Loading Equence a UnitLoading Sequence a Sequence B Unit A2.pT3g $$V LOAD11 Control Size StepsLoadin Sequence B Unit B2,B3 Displacement Compressors UVvW PWprox8514w Al% Al’,BILoading Sequence B Unit Loac \IG Sequence a Loading Sequence B Unit 30GT Displacement Compressors AwoxCapacity Control Steps, 225, 250,280 30GT Capacity Control Steps, 225, 250,280 cantLoac 1G Sequence a Capacity Control Steps, 225, 250, 280 cant250 Loading Sequence B Unit ControlCondenser Fan Sequence FAN Arrangement FAN Numbers Contactor Controlled~jACToR Condenser Fan Sequence cantFAN Arrangement FAN Numbers 30GT250 60 HzKeypad and Display Module Also Called Hsio Keypad and Display Module UsageFunctions Accessing Functions and SubfunctionsFunctions and Subfunctions Operation Keypad Display Description Entry ResponseKeypad Directory Pressure Keypad Directory cant Status cantSubfunction Keypadentry Display Comment AnalogOutputs Subfunction Outputs DisplaySubfunction Keypad Entry Display Comment Outputs HgbraClock Select Keypad Directory cant Test cantSubfunction Keypad Entry Display Comment Override QzqKeypad Directory Schedule cant Keypad Directory cant Service cord Keypad Directory cant Example 1 Reading Alarm Codes Operationat and Mode Display CodesKeypad Display Local on Cool Alarms Modes Local on M O D EExample 2 Reading Current Operating Modes Keypad Display Comments Entry Response Example 3 Using Test FunctionExample 4 Reading and Changing Chilled Water Set Point CRST2 Example 5 Using Return Water Temperature ResetKeypad Display Comments CrstiExample 6 Changing Reset Type Reset Reference Temperature Outdoor AIR 1OR Space TempEKE Ppiq Keypad Display Entry ResponseFLD CFG Ertyp Lstyp Demand MAX Demand Kimax = Example 8 Setting Time of Day Day of WeekDemand Limiting Factory Configuration Keystrokes Adjustable Field ConfigurationsExample 9 Using the Schedule Function DisplayExample 9 Using the Schedule Function cant Example 10 Holiday Schedule FunctionTypical Stoppage Faults and Reset Types Complete Unit Stoppage Complete unit stopAlarm Codes Action Taken Probable Cause N T R O LPage Page ’ Sl R ’ STnanz Compressor Contactor Relay SwitchCGF SNBFig. IOD 24-V Safety Circuit Wiring 225, 250, and 280 Units Electronil c Expansion Valve EXV Page Thermistor and Pressure Transducer Locations Associated Modular Units Refrigerant Temperature Sensor T7, T8 040-210Suction Pressure Transducer 2i.b Voltage Drop Voltage Resistance DropEqualizer OIL Pressure Suction Pressure Sight Glass Line Transducer Each CompressorControl Modules PSIO, SIO Address SelectorSensor Bus Wiring Communications Processor Module PsioComm Troubleshooting Circuit Circuit B Or2 30GN190-210 3OGT225,250,280 Standard and Accessory Unloaders1NO. of Accessory Accessory Unloader Control Wiring 080-110 SO/SO Hz and 130 60 HzHgbpr TLNModule Contactor Switch Circuit Breaker TransformerLmyTEF4 STAGE2Thermistor ModuleJ7-15 ElJ7-16Installation Remote Dual Set Point ControlPage Page Copyright 1994 Carrier Corporation

040-420 specifications

The Carrier 040-420 is a highly regarded commercial HVAC unit specifically designed for efficient heating and cooling in medium- to large-sized buildings. Known for its reliability and advanced technology, this system is ideal for a variety of applications ranging from offices to industrial spaces.

One of the main features of the Carrier 040-420 is its energy efficiency. The unit utilizes advanced compressors and a high-efficiency heat exchanger, which work together to minimize energy consumption while maximizing performance. This is crucial in today’s energy-conscious environment, as businesses strive to reduce operational costs and their carbon footprint. The unit also boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, making it an attractive option for those looking to lower their utility bills.

Equipped with advanced inverter-driven technology, the Carrier 040-420 allows for precise control of indoor climate conditions. This means that the system can adjust its output according to the actual cooling or heating demand of the space, resulting in enhanced comfort and reduced energy waste. The inverter technology also contributes to quieter operation, allowing for a more pleasant indoor environment.

Another feature that sets the Carrier 040-420 apart is its smart controls. The unit can be integrated with Carrier’s Building Automation Systems, enabling remote monitoring and management. This allows facility managers to optimize energy use and immediately respond to any performance issues. Additionally, the unit is compatible with various control interfaces, making it easy for users to adjust settings or schedule operations according to the building's occupancy patterns.

The robust design of the Carrier 040-420 ensures longevity and durability, even in harsh environmental conditions. Its weatherproof casing protects the internal components, enhancing the unit's performance and reliability over time. Maintenance is simplified with accessible design features, allowing technicians to conduct service checks and repairs without extensive downtime.

Overall, the Carrier 040-420 stands out as a modern HVAC solution that combines energy efficiency, advanced technologies, and user-friendly features. Its commitment to performance and sustainability makes it an ideal choice for businesses looking to enhance comfort while being mindful of their energy consumption. With its blend of innovation and reliability, the Carrier 040-420 continues to be a preferred option in the commercial HVAC market.
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