2.Press STATUS .

3.Press COMPRESS .

4.Press SELECT .

5.Set TARGET VFD SPEED to 0%.

Verify that the ACTUAL VFD SPEED shown on the VFD dis- play is within 0 to 1 Hz.

1.Press the ENTER softkey on the VFD keypad until all LEDs on the left side of the keypad are illuminated.

NOTE: The value displayed is the frequency at which the VFD is being commanded to operate.

2.Adjust VFD parameter P.009 (Input Offset) if outside the tolerance.

To confirm that the speed signal from the CVC/ICVC corresponds to the value displayed at the VFD:

3.Verify that the actual speed signal feedback to the chiller controller is 0% by accessing the COMPRESS screen.

4.Verify ACTUAL SPEED VFD is 0%-1% on CVC/ICVC.

5.Adjust VFD parameter r.002 (Analog Output Offset) if outside the tolerance.

Set VFD TARGET VFD SPEED to 100%.

1.Press MENU .

2.Press STATUS .

3.Press COMPRESS .

4.Press SELECT .

5.Set TARGET VFD SPEED to 100%.

Verify that the ACTUAL VFD SPEED shown on the VFD dis- play corresponds to the 50 Hz or 60 Hz setting.

1.Check the ACTUAL VFD SPEED configuration (50 Hz or 60 Hz) on the ISM_CONF screen.

2.Confirm that the VFD displays the configured line fre- quency within ± 1 Hz.

3.Adjust parameter P.010 (Input Gain) if outside the tolerance.

4.Release the TARGET VFD SPEED so that it can operate in automatic mode. (Refer to Override Operations section on page 16.)

VFD CONTROL VERIFICATION (Running)

Preparation

1.Disconnect power to the VFD. Verify that the branch dis- connects or other local disconnects are open and properly tagged out.

2.Connect a voltmeter and ampmeter to the line side of the VFD. Locate meters safely away from the power cables.

3.Reconnect power to the VFD.

4.Measure the voltage on the line side of the drive.

5.Verify it is within 10% of the chiller nameplate voltage.

6.Set up the CVC/ICVC temperature controller per the re- quirements of the job.

7.Start the chiller and verify the rotation of the compressor just as it starts.

8.Allow the chiller to load up. Verify that the chiller loads up smoothly.

NOTE: One or two surges may be counted during the first minute of operation.

Verify That Actual VFD Speed is 100% (±2%)

1.Set the VFD speed to 100%.

2.Verify that the ACTUAL VFD SPEED is 100% (± 2%).

3.If outside the tolerance, adjust r.003 (Output Analog Gain).

4.Leave running for the next test. ISM Current Calibration Check

1.With the target VFD speed at 100%, load the chiller so that the CVC/ICVC default display shows 75% to 100% under the display title AMPS %. A higher load is preferred.

2.Measure the incoming current with a separate amp meter.

3.Calculate the line side error ratio using the following equation:

Amp Meter current – Ave. ISM current

Amp Meter current

4.If the Line Side Error Ratio is greater than ± 0.02 adjust the CVC/ICVC reading by adjusting the ISM CT ratio.

5.Shut down the chiller.

Change CT Ratio

1.New CT Ratio = Present CT Ratio multiplied by (1+ Line Side Error Ratio).

To access the ISM_CONF screen:

2.Press ENTER .

3.Press SERVICE .

4.Enter the password 1111.

5.Select ISM (STARTER) CONFIG DATA.

6.Enter password 4444.

7.Select ISM_CONF.

8.Change present CT ratio to new ratio using calculation above.

9.Press to the SAVE softkey to save changes.

10.Press the EXIT softkey to exit the ISM_CONF screen.

11.Repeat ISM Current Calibration Check.

VFD Current Control Calibration Check

1.With the target VFD speed at 100%, load the chiller so that the CVC/ICVC default display shows 75% to 100% under the display title AMPS %. A higher load is preferred.

2.Access the current on the keypad of the VFD. Determine the Load Side Current Ratio, using the equation below. Load Side Current Ratio =

VFD Actual Load Amps

Motor Nameplate Amps

Next, access the VFD Load Factor on the Capacity Con- trol screen. Calculate the Load Side Error Ratio using the equation below:

Load Side

VFD Load Factor – Load Side Current Ratio

Error Ratio

=

 

Load Side Current Ratio

3.If the load side error ratio is greater than ± 0.02, adjust the VFD load factor by changing the VFD current limit on the Setup 2 screen.

a.The new VFD current limit = old VFD current limit multiplied by (1+ Load Side Error Ratio).

b.Recheck the VFD Current Control Calibration.

c.Release the Speed Control by accessing the TAR- GET VFD SPEED control.

Press MENU . Press STATUS .

Press COMPRESS .

(Refer to Override Operations section on page 16.)

60

Page 59 Page 61
Page 60
Image 60
Carrier 19XR, XRV specifications Press Menu Press Status Press Compress Press Select
Page 59 Page 61

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.
Top Page Image Contents