CONTENTS (cont)

Page

Check Optional Pumpout Compressor

Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Check Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . 47

Inspect Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Carrier Comfort Network Interface . . . . . . . . . . . 48

Check Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

·MECHANICAL-TYPE STARTERS

·BENSHAW, INC. SOLID-STATE STARTER

Oil Charge

50

Power Up the Controls and

 

Check the Oil Heater

50

· SOFTWARE VERSION

 

Set Up Chiller Control Con®guration

50

Input the Design Set Points

50

Input the Local Occupied Schedule

 

(OCCPC01S)

50

Selecting Refrigerant Type

50

· TO CONFIRM REFRIGERANT TYPE

 

· TO CHANGE REFRIGERANT TYPE

 

Input Service Con®gurations . . . . . . . . . . . . . . . . 50

·PASSWORD

·INPUT TIME AND DATE

·CHANGE LID CONFIGURATION IF NECESSARY

·MODIFY CONTROLLER IDENTIFICATION IF NECESSARY

·INPUT EQUIPMENT SERVICE PARAMETERS IF NECESSARY

·MODIFY EQUIPMENT CONFIGURATION IF NECESSARY

·CHECK VOLTAGE SUPPLY

·PERFORM AN AUTOMATED CONTROL TEST

Check Optional Pumpout System

Controls and Compressor . . . . . . . . . . . . . . . . . . . 52

High Altitude Locations . . . . . . . . . . . . . . . . . . . . . 53

Charge Refrigerant Into Chiller . . . . . . . . . . . . . . . 53

·19XL CHILLER EQUALIZATION WITHOUT PUMPOUT UNIT

·19XL CHILLER EQUALIZATION WITH PUMPOUT UNIT

·TRIMMING REFRIGERANT CHARGE

INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . 55,56 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Manual Operation of the Guide Vanes . . . . . . . . 55 Dry Run to Test Start-Up Sequence . . . . . . . . . . 55 Check Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

·IF ROTATION IS PROPER

·IF THE MOTOR ROTATION IS NOT CLOCKWISE

·NOTES ON SOLID-STATE STARTERS

(Benshaw, Inc.)

Check Oil Pressure and Compressor Stop . . . . 56

Calibrate Motor Current . . . . . . . . . . . . . . . . . . . . . 56

To Prevent Accidental Start-Up . . . . . . . . . . . . . . 56

Check Chiller Operating Condition . . . . . . . . . . . 56

Instruct the Customer Operator . . . . . . . . . . . . . . 56

·COOLER-CONDENSER

·OPTIONAL STORAGE TANK AND PUMPOUT SYSTEM

·MOTOR COMPRESSOR ASSEMBLY

·MOTOR COMPRESSOR LUBRICATION SYSTEM

·CONTROL SYSTEM

·AUXILIARY EQUIPMENT

·DESCRIBE CHILLER CYCLES

·REVIEW MAINTENANCE

·SAFETY DEVICES AND PROCEDURES

·CHECK OPERATOR KNOWLEDGE

·REVIEW THE START-UP, OPERATION, AND MAINTENANCE MANUAL

Page

OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . 56-58 Operator Duties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Prepare the Chiller for Start-Up . . . . . . . . . . . . . . 56 To Start the Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Check the Running System . . . . . . . . . . . . . . . . . . 56 To Stop the Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . 57 After Limited Shutdown . . . . . . . . . . . . . . . . . . . . . 57 Extended Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 57 After Extended Shutdown . . . . . . . . . . . . . . . . . . . 57 Cold Weather Operation . . . . . . . . . . . . . . . . . . . . . 57 Manual Guide Vane Operation . . . . . . . . . . . . . . . 57 Refrigeration Log . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

PUMPOUT AND REFRIGERANT

TRANSFER PROCEDURES . . . . . . . . . . . . . . . . 59-61 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Operating the Optional Pumpout

Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

· TO READ REFRIGERANT PRESSURES

Chillers with Pumpout Storage Tanks . . . . . . . . 59

·TRANSFER REFRIGERANT FROM STORAGE TANK TO CHILLER

·TRANSFER THE REFRIGERANT FROM CHILLER TO STORAGE TANK

Chillers with Isolation Valves . . . . . . . . . . . . . . . . 60

·TRANSFER ALL REFRIGERANT TO CHILLER CONDENSER VESSEL

·TRANSFER ALL REFRIGERANT TO CHILLER COOLER/COMPRESSOR VESSEL

·RETURN REFRIGERANT TO NORMAL OPERATING CONDITIONS

GENERAL MAINTENANCE . . . . . . . . . . . . . . . . . 61,62 Refrigerant Properties . . . . . . . . . . . . . . . . . . . . . . . 61 Adding Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Removing Refrigerant . . . . . . . . . . . . . . . . . . . . . . . 61 Adjusting the Refrigerant Charge . . . . . . . . . . . . 61 Refrigerant Leak Testing . . . . . . . . . . . . . . . . . . . . 61 Leak Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Test After Service, Repair, or Major Leak . . . . . 61

·REFRIGERANT TRACER

·TO PRESSURIZE WITH DRY NITROGEN

Repair the Leak, Retest, and Apply

Standing Vacuum Test . . . . . . . . . . . . . . . . . . . . 62

Checking Guide Vane Linkage . . . . . . . . . . . . . . . 62

·CHECKING THE AUXILIARY SWITCH ON GUIDE VANE ACTUATOR

Trim Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . 62

WEEKLY MAINTENANCE . . . . . . . . . . . . . . . . . . . . 62

Check the Lubrication System . . . . . . . . . . . . . . . 62

SCHEDULED MAINTENANCE

63-65

Service Ontime

. . 63

Inspect the Control Center

. . 63

Check Safety and Operating Controls

 

Monthly

. . 63

Changing Oil Filter

. . 63

Oil Speci®cation

. . 63

Oil Changes

. . 63

· TO CHANGE THE OIL

 

Refrigerant Filter

. . 63

Oil Reclaim Filters

. . 63

Inspect Refrigerant Float System

. . 64

Inspect Relief Valves and Piping

. . 64

Compressor Bearing and Gear

 

Maintenance

. . 64

Inspect the Heat Exchanger Tubes

. . 64

· COOLER

 

· CONDENSER

 

3

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Carrier 19XL specifications Contents

19XL specifications

The Carrier 19XL is a highly regarded commercial heating and cooling solution, designed to provide optimum performance and energy efficiency in various applications. This rooftop unit is engineered to meet the diverse needs of businesses, making it an ideal choice for those requiring reliable climate control in their facilities.

One of the standout features of the Carrier 19XL is its advanced cooling and heating capabilities. The unit utilizes a high-efficiency scroll compressor that ensures a quieter operation and improved reliability. The system can operate across a wide range of temperatures, making it versatile for various climates. Additionally, it offers both cooling and heating options, allowing for year-round comfort.

Energy efficiency is a focal point of the 19XL design. With an impressive Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), this unit not only helps reduce energy costs but also supports environmental sustainability initiatives. The unit is equipped with environmentally friendly refrigerants, further contributing to lower greenhouse gas emissions.

The Carrier 19XL features a user-friendly control system, allowing for easy monitoring and management of the unit's performance. This control system is designed to maximize energy savings, offering features such as demand control ventilation and integrated economizers that facilitate the use of outdoor air for cooling, reducing reliance on mechanical systems when conditions allow.

Construction-wise, the Carrier 19XL is built to withstand tough environmental conditions. Its robust cabinet is made from galvanized steel, providing durability and protection against the elements. The design also includes insulation to minimize noise levels, creating a more comfortable indoor environment.

Maintenance is a key consideration in the design of the 19XL. The unit features accessible service ports and a simplified access panel, allowing technicians to perform routine maintenance with ease. This proactive design helps ensure the longevity of the system and minimizes downtime, keeping operations running smoothly.

In summary, the Carrier 19XL is an exceptional choice for commercial heating and cooling needs. With its energy-efficient features, advanced technology, and durable construction, it stands out as a reliable solution for businesses looking for sustainable climate control options.