Table 2 — CVC/ICVC Display Data (cont)

EXAMPLE 11 — OVERRIDE DISPLAY SCREEN

To access this display from the CVC/ICVC default screen:

1. Press MENU .

2.Press SERVICE .

3.Scroll down to highlight

4.Press SELECT .

5.Scroll down to highlight

6.Press SELECT .

CONTROL ALGORITHM STATUS .

OVERRIDE .

DESCRIPTION

STATUS

UNITS

POINT

Comp Motor Winding Temp

–40-245

DEG F

MTRW

Comp Motor Temp Override

150-200

DEG F

mt_over

Condenser Pressure

0-420

PSI

CRP

Cond Press Override

90-180

PSI

cp_over

Evaporator Refrig Temp

–40-245

DEG F

ERT

Evap Ref Override Temp

2-45

DEG F

rt_over

Comp Discharge Temp

–40-245

DEG F

CMPD

Comp Discharge Alert

125-200

DEG F

cd_alert

Comp Thrust Brg Temp

–40-245

DEG F

MTRB

Comp Thrust Brg Alert

165-185

DEG F

tb_alert

Actual Superheat

–20-99

^F

SUPRHEAT

Superheat Required

6-99

^F

SUPR_REQ

Condenser Refrig Temp

–40-245

DEG F

CRT

NOTE: All variables with CAPITAL LETTER point names are available for CCN read operation; forcing shall not be supported on maintenance screens.

EXAMPLE 12 — LL_MAINT DISPLAY SCREEN

To access this display from the CVC/ICVC default screen:

1.Press MENU .

2.Press SERVICE .

3.Scroll down to highlight CONTROL ALGORITHM STATUS .

4.Press SELECT .

5.Scroll down to highlight LL_MAINT.

6.Press SELECT .

DESCRIPTION

STATUS

UNITS

POINT

LeadLag Control

 

 

 

LEADLAG: Configuration

NOTE 1

 

leadlag

Current Mode

NOTE 2

 

llmode

Load Balance Option

0/1

DSABLE/ENABLE

loadbal

LAG START Time

2-60

MIN

lagstart

LAG STOP Time

2-60

MIN

lagstop

Prestart Fault Time

2-30

MIN

preflt

Pulldown: Delta T / Min

x.xx

^F

pull_dt

Satisfied?

0/1

NO/YES

pull_sat

LEAD CHILLER in Control

0/1

NO/YES

leadctrl

LAG CHILLER: Mode

NOTE 3

 

lagmode

Run Status

NOTE 4

 

lagstat

Start/Stop

NOTE 5

 

lag_s_s

Recovery Start Request

0/1

NO/YES

lag_rec

STANDBY CHILLER: Mode

NOTE 3

 

stdmode

Run Status

NOTE 4

 

stdstat

Start/Stop

NOTE 5

 

Std_s_s

Recovery Start Request

0/1

NO/YES

std_rec

Spare Temperature 1

–40-245

DEG F

SPARE_1

Spare Temperature 2

–40-245

DEG F

SPARE_2

NOTES:

1.DISABLE, LEAD, LAG, STANDBY, INVALID

2.DISABLE, LEAD, LAG, STANDBY, RECOVERY, CONFIG

3.Reset, Off, Local, CCN

4.Timeout, Ready, Recycle, Prestart, Startup, Ramping, Running, Demand, Override, Shutdown, Trippout, Pumpdown, Lockout

5.Stop, Start, Retain

6.All variables with CAPITAL LETTER point names are available for CCN read operation; forcing shall not be supported on maintenance screens.

27

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Image 27
Carrier XRV, 19XR Example 11 Override Display Screen, Control Algorithm Status Override Description Units Point
Page 26 Page 28

19XR, XRV specifications

The Carrier 19XR and 19XRV chillers are sophisticated cooling solutions that represent the forefront of HVAC technology. Designed for large commercial and industrial applications, these chillers provide exceptional performance, energy efficiency, and reliability, making them ideal for a variety of environments ranging from hospitals to manufacturing facilities.

One of the most significant features of the Carrier 19XR and 19XRV chillers is their advanced scroll compressor technology. These units employ a tandem scroll design that enhances efficiency while minimizing operational noise. This makes them ideal for urban environments where noise restrictions may be in place. Moreover, the compressors are equipped with variable speed drive options in the 19XRV model, which allows for greater energy savings by adjusting cooling output based on real-time demand.

In addition to their advanced compressors, the 19XR and 19XRV units incorporate the Carrier GreenChoice refrigerant, which has a lower global warming potential compared to traditional refrigerants. This innovative choice not only meets regulatory requirements but also contributes to sustainability goals, making these chillers a responsible choice for environmentally conscious organizations.

The units are engineered with a robust heat exchanger design, which enhances heat transfer efficiency and overall system performance. This ensures optimal operation even in extreme conditions. They feature a microprocessor-based control system that allows for precise monitoring and control of the chiller’s performance, enabling operators to make real-time adjustments to maximize energy efficiency.

The Carrier 19XR and 19XRV chillers also prioritize serviceability. The design incorporates easy access to key components, simplifying maintenance procedures and reducing downtime. This focus on maintainability extends the lifespan of the equipment, leading to lower lifecycle costs.

In terms of connectivity, these chillers are equipped with advanced Building Management System (BMS) integration capabilities. This allows for seamless monitoring and control of the chillers using a centralized platform, facilitating energy management and operational optimization.

Overall, the Carrier 19XR and 19XRV chillers stand out in the market for their blend of cutting-edge technology, energy efficiency, and user-friendly features. They are engineered to meet the demanding needs of modern commercial and industrial applications, making them a preferred choice for facility managers seeking reliable cooling solutions.
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