CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ABBREVIATIONS AND EXPLANATIONS . . . . . . . 4

CHILLER FAMILIARIZATION . . . . . . . . . . . . . . . . . . 5

Chiller Information Plate . . . . . . . . . . . . . . . . . . . . . . 5

System Components . . . . . . . . . . . . . . . . . . . . . . . . . 5

Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Motor-Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Control Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Factory-Mounted Starter (Optional) . . . . . . . . . . . . 5

Storage Vessel (Optional) . . . . . . . . . . . . . . . . . . . . . 5

REFRIGERATION CYCLE . . . . . . . . . . . . . . . . . . . . . 5

MOTOR/OIL REFRIGERATION

COOLING CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

LUBRICATION CYCLE . . . . . . . . . . . . . . . . . . . . . . . 8,9

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Oil Reclaim System . . . . . . . . . . . . . . . . . . . . . . . . . . 9

·DURING NORMAL CHILLER OPERATION

·DURING LIGHT LOAD CONDITIONS

STARTING EQUIPMENT . . . . . . . . . . . . . . . . . . . . 10,11

Unit Mounted Solid-State Starter

(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Unit Mounted Wye-Delta Starter

(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-39 De®nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

·ANALOG SIGNAL

·DIGITAL SIGNAL

·VOLATILE MEMORY

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 PIC System Components . . . . . . . . . . . . . . . . . . . . 11

·PROCESSOR MODULE (PSIO)

·STARTER MANAGEMENT MODULE (SMM)

·LOCAL INTERFACE DEVICE (LID)

·6-PACK RELAY BOARD

·8-INPUT MODULES

·OIL HEATER CONTACTOR (1C)

·OIL PUMP CONTACTOR (2C)

·HOT GAS BYPASS CONTACTOR RELAY (3C) (Optional)

·CONTROL TRANSFORMERS (T1-T4)

·CONTROL AND OIL HEATER VOLTAGE SELECTOR (S1)

LID Operation and Menus . . . . . . . . . . . . . . . . . . . 14

·GENERAL

·ALARMS AND ALERTS

·MENU STRUCTURE

·TO VIEW POINT STATUS

·OVERRIDE OPERATIONS

·TIME SCHEDULE OPERATION

·TO VIEW AND CHANGE SET POINTS

·SERVICE OPERATION

PIC System Functions . . . . . . . . . . . . . . . . . . . . . . . 28

·CAPACITY CONTROL

·ENTERING CHILLED WATER CONTROL

·DEADBAND

·PROPORTIONAL BANDS AND GAIN

·DEMAND LIMITING

·CHILLER TIMERS

·OCCUPANCY SCHEDULE

Safety Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

· SHUNT TRIP

Default Screen Freeze . . . . . . . . . . . . . . . . . . . . . . . 29

Page

Motor Cooling Control . . . . . . . . . . . . . . . . . . . . . . . 29

Ramp Loading Control . . . . . . . . . . . . . . . . . . . . . . 31

Capacity Override . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

High Discharge Temperature Control . . . . . . . . . 32

Oil Sump Temperature Control . . . . . . . . . . . . . . . 32

·PSIO SOFTWARE VERSIONS 08 AND LOWER

·PSIO SOFTWARE VERSIONS 09 AND HIGHER

Oil Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Remote Start/Stop Controls . . . . . . . . . . . . . . . . . . 32

Spare Safety Inputs . . . . . . . . . . . . . . . . . . . . . . . . . 32

· SPARE ALARM CONTACTS

Condenser Pump Control . . . . . . . . . . . . . . . . . . . . 32

Condenser Freeze Protection . . . . . . . . . . . . . . . . 32

Tower Fan Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Auto. Restart After Power Failure . . . . . . . . . . . . 33

Water/Brine Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

·RESET TYPE 1

·RESET TYPE 2

·RESET TYPE 3

Demand Limit Control, Option

(Requires Optional 8-Input Module) . . . . . . . . . . 33

Surge Prevention Algorithm . . . . . . . . . . . . . . . . . 33

Surge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Lead/Lag Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

·COMMON POINT SENSOR INSTALLATION

·CHILLER COMMUNICATION WIRING

·LEAD/LAG OPERATION

·FAULTED CHILLER OPERATION

·LOAD BALANCING

·AUTO. RESTART AFTER POWER FAILURE

Ice Build Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

·ICE BUILD INITIATION

·START-UP/RECYCLE OPERATION

·TEMPERATURE CONTROL DURING ICE BUILD

·TERMINATION OF ICE BUILD

·RETURN TO NON-ICE BUILD OPERATIONS

Attach to Network Device Control . . . . . . . . . . . . 37

·CHANGING REFRIGERANT TYPES

·ATTACHING TO OTHER CCN MODULES

Service Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

·TO LOG ON

·TO LOG OFF

·HOLIDAY SCHEDULING

START-UP/SHUTDOWN/RECYCLE

SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-41

Local Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Shutdown Sequence . . . . . . . . . . . . . . . . . . . . . . . . 40

Automatic Soft-Stop Amps Threshold

(PSIO Software Version 09 and Higher) . . . . . . 40

Chilled Water Recycle Mode . . . . . . . . . . . . . . . . . 40

Safety Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

BEFORE INITIAL START-UP . . . . . . . . . . . . . . . . 41-54

Job Data Required . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . 41

Using the Optional Storage Tank

and Pumpout System . . . . . . . . . . . . . . . . . . . . . . . 41

Remove Shipping Packaging . . . . . . . . . . . . . . . . 41

Open Oil Circuit Valves . . . . . . . . . . . . . . . . . . . . . . 41

Tighten All Gasketed Joints and

Guide Vane Shaft Packing . . . . . . . . . . . . . . . . . . 41

Check Chiller Tightness . . . . . . . . . . . . . . . . . . . . . 41

Refrigerant Tracer . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Leak Test Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Standing Vacuum Test . . . . . . . . . . . . . . . . . . . . . . 43

Chiller Dehydration . . . . . . . . . . . . . . . . . . . . . . . . . 47

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

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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.