Carrier 040-420 Keypad Directory cant Status cant, Subfunction Keypadentry Display Comment

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Table 9 - Keypad Directory (cant)

STATUS (cant)

SUBFUNCTION

KEYPADENTRY

DISPLAY

COMMENT

TEMPERATURE (cant)

cl 4

SCTB X

Circuit B Saturated Condenser Temperature

S S T B X

Circuit B Saturated Suction Temperature

c• 4

CTB X

Compressor Bl Suction Temperature

c• 4

SHB X

Circuit B

Suction Superheat

RST

Reset Temperature

PRESSURE

Refrigerant System Pressure (psig)

DPA X

Circuit A Discharge Pressure

SPA X

Circuit A Suction Pressure

xxx x

Circuit A Discharge/Suction

OPA X

Circuit A Oil Pressure Differential

DPB X

Circuit B Discharge Pressure

SPB X

Circuit 8 Suction Pressure

xxx x

Circuit B Discharge/Suction

O P B

Circuit B Oil Pressure Differential

8 ANALOG

ANALOG

Status of Analog Inputs

REF X

Transducer Supply Voltage

LMT X*

Demand

4-20 mA Signal

RST

Reset 4-20 mA

Signal

1NPUTS

INPUT

Status of Switch Inputs

SPW

Dual Set

Point

Switch

DLI

Demand

Limit

Switch

DL2

Demand

Limit

Switch

3 1

Image 31

Contents Contrc Unit Model Unit Sizes and Modular CombinationsField Keypaddisplay Ground Fault InterrupterSource PSI RELAY, BThermistors LOCAL/ENABLE-STOP-CCN Switch Positions and OperationCompressor Protection Control Module Cpcs Thermistor and Transducer LocationsSteps CapacityControl Steps Loading Sequence a Loading Sequence B Unit Control060A\~**Hz Capacity Control Steps, 040-070 cantLoading Sequence a Loading Sequence B Unit Oy&ya Capacity Control Steps, 040-070 cantFBI 08Aqy,y AitiA4l&pi’ BP’ StepsLoading Loading Sequence B Unit Control Loading Sequence a Loading Equence B Unit Altt BittWtf2Z$’ Altt’tt Amrox$-t&Z3 Loading Sequence a Quence B Unit Control Displacement Compressors UWrW Arwox A2.p $#l 110 50 HzAlt,Blv Loading Equence a Displacement Compressors MvroxEquence B 130, 240A Awrox Drt,t130, 24OA 130,24OALoading Equence a Unit Attll’T3g A2.pLoading Sequence a Sequence B Unit $$V Control Size Steps LOAD11Loadin Sequence B Unit Al% Al’,BI Displacement Compressors UVvW PWprox8514w B2,B3Loading Sequence B Unit Capacity Control Steps, 225, 250,280 30GT Displacement Compressors AwoxLoac \IG Sequence a Loading Sequence B Unit Loac Capacity Control Steps, 225, 250,280 cant30GT Loading Sequence B Unit Control Capacity Control Steps, 225, 250, 280 cant250 1G Sequence aFAN Arrangement FAN Numbers Contactor Controlled Condenser Fan Sequence30GT250 60 Hz Condenser Fan Sequence cantFAN Arrangement FAN Numbers ~jACToRKeypad and Display Module Usage Keypad and Display Module Also Called HsioOperation Keypad Display Description Entry Response Accessing Functions and SubfunctionsFunctions and Subfunctions FunctionsKeypad Directory Analog Keypad Directory cant Status cantSubfunction Keypadentry Display Comment PressureHgbra Subfunction Outputs DisplaySubfunction Keypad Entry Display Comment Outputs OutputsQzq Keypad Directory cant Test cantSubfunction Keypad Entry Display Comment Override Clock SelectKeypad Directory Schedule cant Keypad Directory cant Service cord Keypad Directory cant Operationat and Mode Display Codes Example 1 Reading Alarm CodesExample 2 Reading Current Operating Modes Local on Cool Alarms Modes Local on M O D EKeypad Display Example 4 Reading and Changing Chilled Water Set Point Example 3 Using Test FunctionKeypad Display Comments Entry Response Crsti Example 5 Using Return Water Temperature ResetKeypad Display Comments CRST2Reset Reference Temperature Outdoor AIR 1OR Space Temp Example 6 Changing Reset TypeEKE FLD CFG Ertyp Lstyp Demand Keypad Display Entry ResponsePpiq Demand Limiting Example 8 Setting Time of Day Day of WeekMAX Demand Kimax = Adjustable Field Configurations Factory Configuration KeystrokesDisplay Example 9 Using the Schedule FunctionExample 10 Holiday Schedule Function Example 9 Using the Schedule Function cantComplete Unit Stoppage Complete unit stop Typical Stoppage Faults and Reset TypesAction Taken Probable Cause N T R O L Alarm CodesPage Page R ’ S ’ SlTnanz SNB SwitchCGF Compressor Contactor RelayFig. IOD 24-V Safety Circuit Wiring 225, 250, and 280 Units Electronil c Expansion Valve EXV Page Thermistor and Pressure Transducer Locations Suction Refrigerant Temperature Sensor T7, T8 040-210Associated Modular Units Pressure Transducer 2i.b Voltage Resistance Drop Voltage DropLine Transducer Each Compressor Equalizer OIL Pressure Suction Pressure Sight GlassPSIO, SIO Address Selector Control ModulesProcessor Module Psio Sensor Bus Wiring CommunicationsComm Troubleshooting 1NO. of Accessory Standard and Accessory UnloadersCircuit Circuit B Or2 30GN190-210 3OGT225,250,280 080-110 SO/SO Hz and 130 60 Hz Accessory Unloader Control WiringTLN HgbprSTAGE2 Contactor Switch Circuit Breaker TransformerLmyTEF4 ModuleElJ7-16 ModuleJ7-15 ThermistorRemote Dual Set Point Control InstallationPage 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.