Carrier MINIMUM LOAD CONTROL ACCESSORY 30XA080-500 User Manual

Page 8

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300010-01

Printed in U.S.A.

Form 30XA-6SI

Pg 8

12-06

Replaces: New

Book 2

Tab

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, Start-Up,

Operation, Service, and Troubleshooting manual for additional

information.
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

until the screen is blank and use the

arrow key to select the Configuration mode LED.

3. Press

, then use the arrow key to select the

sub-mode ‘UNIT’, then press the

key.

4. Press the down arrow key until ‘HGBP’ is displayed.
5. Press the

key. If the login menu is displayed,

key after each number until finished.

6. Press the

key so that ‘No’ flashes.

7. Use the arrow keys to change the value to ‘Yes.’
8. Press the

key.

9. Press the

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, Start-Up, Operation, Service, and

Troubleshooting manuals to verify proper operation of the

solenoid(s).

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 (30XA400-500 only) by pressing the page down
button

. Repeat Steps 5-7 for Cir. B MLV and Cir. C

MLV.

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

until the screen is blank and use the

arrow key to select the Service Test mode LED.

3. Press

, then use the arrow key to select the

sub-mode ‘QUIC’, then press the

key.

4. Press the down arrow key until ‘HGP.A’ is displayed.
5. Press the

key. If the login menu is displayed,

key after each number until finished.

6. Press the

key so that ‘Off’ flashes.

7. Use the arrow keys to change the value to ‘On.’
8. Press the

key.

9. Verify that the Cir. A minimum load valve (MLV)

solenoid is energized.

10. Proceed to ‘HGP.B’ and ‘HGP.C’ (30XA400-500 only)

and repeat Steps 4-9 for Cir. B MLV and Cir. C. MLV.

11. Once the outputs have been tested, the installation is com-

plete. Return the Enable/Off/Remote contact switch to the

desired position.

ESCAPE

ENTER

ESCAPE

ENTER