Table 9 Ð Keypad Directory (cont)

STATUS (cont)

SUBFUNCTION

KEYPAD ENTRY

DISPLAY

COMMENT

 

 

 

 

7 PRESSURE

 

PRESSURE

Refrigerant System Pressure (psig)

 

 

MM DD YY

Date of Last Calibration

 

 

DPA X

Circuit A Discharge Pressure (psig)

 

 

SPA X

Circuit A Suction Pressure (psig)

 

 

XXXX XXX

Circuit A Discharge/Suction (psig)

 

 

OPA X

Circuit A Oil Pressure Differential (psig)

 

 

DPB X

Circuit B Discharge Pressure (psig)

 

 

SPB X

Circuit B Suction Pressure (psig)

 

 

XXXX XXX

Circuit B Discharge/Suction (psig)

 

 

OPB X

Circuit B Oil Pressure Differential (psig)

 

 

 

 

8 ANALOG

 

ANALOG

Status of Analog Inputs

 

 

REF X

Transducer Supply Voltage (volts)

 

 

LMT X²

Demand 4-20 mA Signal (mA)

 

 

RST X²

Reset 4-20 mA Signal (mA)

 

 

 

 

9 INPUTS

 

SW INPUT

Status of Switch Inputs

 

 

SPW X²

Dual Set Point Switch (open/closed)

 

 

DL1 X²

Demand Limit Switch 1 (open/closed)

 

 

DL2 X²

Demand Limit Switch 2 (open/closed)

 

 

 

 

10 OUTPUTS

 

OUTPUTS

Status of Outputs

 

 

ALMR X

Alarm Relay K3 (on/off)

 

 

FRA1 X

Fan Relay K1 (on/off)

 

 

FRA2 X

Fan Relay K2 (on/off)

 

 

FRB1 X

Fan Relay K4 (on/off)

 

 

FRB2 X

Fan Relay K5 (on/off)

 

 

CHWP X²

Cooler Water Pump Relay K6 (on/off)

 

 

ULA1 X

Unloader A1 (on/off)**

 

 

ULA2 X²

Unloader A2 (on/off)**

 

 

ULB1 X

Unloader B1 (on/off)**

 

 

ULB2 X²

Unloader B2 (on/off)**

 

 

LLSA X

Liquid Line Solenoid A

 

 

LLSB X

Liquid Line Solenoid B

 

 

EXVA X

EXVA Percent Open²

 

 

 

 

LEGEND

CCN Ð Carrier Comfort Network

EXV Ð Electronic Expansion Valve

MOP Ð Maximum Operating Pressure

*Will read ALARM or ALERT as appropriate. ²Must be con®gured.

**If applicable.

²²Not manually resettable.

NOTE: If metric option is selected under , temperature expressed as Celsius and pressure will be expressed as kPa.

29

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Carrier 30GN040-420 operating instructions Subfunction Keypad Entry Display Comment Pressure, Analog, Inputs, Outputs

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.