Configure Unit for Minimum Load Control —
The controls must be configured for the minimum load control operation. Use the Touch Pilot™ or the Navigator™ display to configure the system. Refer to the 30XA Controls,
Complete the following steps to configure minimum load con- trol with the Touch Pilot display:
1.Ensure the unit is in Local Off operating mode by looking at the upper left hand corner of the group display. If the
unit is not in Local Off mode, press the Start/Stop button
to switch to the Local Off operating mode.
2. Press the main menu button | on the bottom line of the |
display, and then select Service→ Factory to navigate to the factory table.
3.Scroll down the screen by pressing the Scroll Down
button 
or the Page Down button 
until Hot Gas Bypass Select is displayed on the screen. Press Hot Gas Bypass Select to display the Point Data dialog.
4.Press the Modify button 
. If the login menu is dis- played, log in with the password. The default password is
3333. Press the OK button 
to confirm the input. The value of hgbp_sel will display. Select Yes and press
the OK button 
to confirm the input.
5.Press the Home button 
on the bottom line of the dis- play. A save confirmation menu will display. Press the
OK button 
to confirm the action.
6.Wait 10 seconds and cycle the control power using the Emergency On/Off switch (SW2).
The chiller is now configured for minimum load valve control.
Complete the following steps to configure minimum load con- trol with the Navigator display:
1.Set the Enable/Off/Remote switch to the Off position.
2.Press ESCAPE until the screen is blank and use the arrow key to select the Configuration mode LED.
3.Press ENTER , then use the arrow key to select the
4.Press the down arrow key until ‘HGBP’ is displayed.
5.Press the ENTER key. If the login menu is displayed, log in with the password. The default password is 0 1 1 1. Use the arrow keys to change each number’s value. Press the ENTER key after each number until finished.
6.Press the ENTER key so that ‘No’ flashes.
7.Use the arrow keys to change the value to ‘Yes.’
8.Press the ENTER key.
9.Press the ESCAPE key until ‘DISP’ is displayed. Wait 10 seconds and cycle the control power using the Emer- gency On/Off switch (SW2).
The chiller is now configured for minimum load valve control.
Test Minimum Load Relay Output — Use the Touch Pilot or Navigator display’s service test mode and the instruc- tions given in their Controls,
For the Touch Pilot display:
1.Ensure the unit is in Local Off operating mode by looking at the upper left hand corner of the group display. If the
unit is not in the Local Off mode, press the Start/Stop but- ton 
to switch to the Local Off operating mode.
2. Press the Main Menu button on the bottom line of the display and then select Status→ Quick Test Enable.
3.Press the Force button 
. If the login menu is dis- played, log in with the password. The default password is
3333. Press the OK button 
to confirm the input.
4.The value of qck_test1 will display. Select On and press
the OK button 
to confirm the input.
5.Scroll down the screen by pressing the scroll down button
or the page down 
button until Cir. A Hot Gas Bypass is displayed on the screen. Press Cir. A Hot Gas Bypass Select to display the Point Data dialog.
6.Press the Force button 
. Select On and press the OK
button 
to confirm input.
7.Verify that the Cir. A minimum load valve (MLV) sole- noid is energized.
8.Proceed to Cir. B Hot Gas Bypass and Cir. C Hot Gas By- pass
button 
. Repeat Steps
9.Use the page up button 
to return to the top of the ta- ble and select Quick Test Enable.
10.Press the Force button 
.
11.Select Off and press the OK button 
to disable Quick Test.
12.Once the outputs have been tested, the installation is com- plete. Return the Touch Pilot to Local Off operating mode.
For the Navigator display:
1.Set the Enable/Off/Remote switch to the Off position.
2.Press ESCAPE until the screen is blank and use the arrow key to select the Service Test mode LED.
3.Press ENTER , then use the arrow key to select the
4.Press the down arrow key until ‘HGP.A’ is displayed.
5.Press the ENTER key. If the login menu is displayed, log in with the password. The default password is 0 1 1 1. Use the arrow keys to change each number’s value. Press the ENTER key after each number until finished.
6.Press the ENTER key so that ‘Off’ flashes.
7.Use the arrow keys to change the value to ‘On.’
8.Press the ENTER key.
9.Verify that the Cir. A minimum load valve (MLV) solenoid is energized.
10.Proceed to ‘HGP.B’ and ‘HGP.C’
11.Once the outputs have been tested, the installation is com- plete. Return the Enable/Off/Remote contact switch to the desired position.
Copyright 2006 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book | 2 | Catalog No. | Printed in U.S.A. | Form | Pg 8 | Replaces: New | |
Tab | 5c |
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