Table 2 Ð LID Screens (cont)

EXAMPLE 10 Ð MAINTENANCE (MAINT01) DISPLAY SCREEN

To access this display from the LID default screen:

1.Press MENU .

2.Press SERVICE .

3.Scroll down to highlight ALGORITHM STATUS.

4.Press SELECT .

5.Scroll down to highlight MAINT01.

DESCRIPTION

RANGE/STATUS

UNITS

REFERENCE POINT NAME

CAPACITY CONTROL

 

 

 

 

 

 

 

 

Control Point

10-120 (±12.2-48.9)

DEG F (DEG C)

ctrlpt

Leaving Chilled Water

±40-245 (±40-118)

DEG F (DEG C)

LCW

Entering Chilled Water

±40-245 (±40-118)

DEG F (DEG C)

ECW

Control Point Error

±99-99 (±55-55)

DEG F (DEG C)

cperr

ECW Delta T

±99-99 (±55-55)

DEG F (DEG C)

ecwdt

ECW Reset

±99-99 (±55-55)

DEG F (DEG C)

ecwres

LCW Reset

±99-99 (±55-55)

DEG F (DEG C)

lcwres

Total Error + Resets

±99-99 (±55-55)

DEG F (DEG C)

error

 

 

Guide Vane Delta

±2-2

%

gvd

 

 

Target Guide Vane Pos

0-100

%

GV

 

 

 

TRG

Actual Guide Vane Pos

0-100

%

GV

 

 

 

ACT

Proportional Inc Band

2-10

 

gv

 

 

inc

Proportional Dec Band

2-10

 

gv

 

 

dec

Proportional ECW Gain

1-3

 

gv

 

 

ecw

Water/Brine Deadband

0.5-2 (0.3-1.1)

DEG F (DEG C)

cwdb

NOTE: Overriding is not supported on this maintenance screen. Active overrides show the associated point in alert (*). Only values with capital letter reference point names are variables available for read operation.

EXAMPLE 11 Ð MAINTENANCE (MAINT02) DISPLAY SCREEN

To access this display from the LID default screen:

1.Press

2.Press

MENU

SERVICE

.

.

3. Scroll down to highlight CONTROL ALGORITHM STATUS.

4. Press

SELECT

.

5. Scroll down to highlight MAINT02.

6. Press

SELECT

.

DESCRIPTION

RANGE/STATUS

UNITS

REFERENCE POINT NAME

OVERRIDE/ALERT STATUS

 

 

 

 

 

 

 

 

 

 

MOTOR WINDING TEMP

±40-245 (±40-118)

DEG F (DEG C)

MTRW

Override Threshold

150-200 (66-93)

DEG F (DEG C)

mt

 

 

 

over

 

 

 

CONDENSER PRESSURE

±6.7-420 (±42-2896)

PSI (kPa)

CRP

Override Threshold

90-245 (621-1689)

PSI (kPa)

cp

 

 

 

 

over

 

 

 

 

EVAPORATOR REFRIG TEMP

±40-245 (±40-118)

DEG F (DEG C)

ERT

Override Threshold

2-45 (1-7.2)

DEG F (DEG C)

rt

 

 

 

over

 

 

 

DISCHARGE TEMPERATURE

±40-245 (±40-118)

DEG F (DEG C)

CMPD

Alert Threshold

125-200 (52-93)

DEG F (DEG C)

cd

 

 

 

 

alert

 

 

 

 

BEARING TEMPERATURE

±40-245 (±40-118)

DEG F (DEG C)

MTRB

Alert Threshold

175-185 (79-85)

DEG F (DEG C)

tb

 

 

 

alert

 

 

 

NOTE: Overriding is not supported on this maintenance screen. Active overrides show the associated point in alert (*). Only values with capital letter reference point names are variables available for read operation.

26

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Image 26
Carrier 19XL Example 10 Ð Maintenance MAINT01 Display Screen, Example 11 Ð Maintenance MAINT02 Display Screen

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.