VAV Unit Start-Up

PERFORM AUTOMATIC RUN TEST — The 50BVJ,K, W,X unit controls are programmed with an automatic run test that checks connection and operation of major components. To perform the run test:

Verify that the control display (LID [Local Interface Dis- play] device/system monitor) interface cable is connected to in- ternal jack on main controller; that the fire alarm/shutdown switch input (FSD) has a factory jumper or field input; and that the Local/Off/Remote switch is set to the REMOTE position (Fig. 17).

NOTE: When the Local/Off/Remote switch is in the REMOTE position, the controller time schedule is pre-set (from the factory) as unoccupied. This means that the unit will not turn on until the run test is enabled. However, if the con- troller schedule has already been modified in the field, and the current time of day is occupied, then the supply fan will start. The run test will shut the fan down when it begins. The run test will complete and then the supply fan will automatically restart.

NOTE: If the Local/Off/Remote switch is in the OFF position, it is normal for the red alarm light on the display panel to be lit, indicating that the unit is disabled.

NOTE: If the light stays on when the switch is moved to REMOTE, or if any other problems occur during the run test, refer to the Troubleshooting section of this manual.

To perform the run test:

1.Turn unit power on.

The LID display will show the controller identification, time, and date (Fig. 32):

OMNIZONE VPAC hh:mm mm-dd-yy

2.Press 3 and then SET . The LID display will show: Controller Password

3.Press ENTER . The LID display will show: Log in to Controller

Enter Password

NOTE: The LID display has two modes: Edit mode and Status/Maintenance mode. If the LID display is in Edit mode, then the display will only show the word “pass- word.” Press the EXPN/EDIT key to toggle to the Status mode.

Press the EXPN/EDIT to display: Log in to Controller

Enter Password

4.Key in the password and press ENTER . NOTE: The default password is 1111.

5.The LID display will show: Log in to Controller Logged In

6.Press 37 ALGO . The display will show: Custom Program

7.Press ENTER . The display will show: 2.0 Global Dictionary

OMNIZONE

8.Press EXPN/EDIT (NOTE: Display will flash and is now in edit mode.) The display will show:

2.0 Global Dictionary

OMNIZONE

9.Press ENTER . The display will show: Compressor Stages

2.00 (sizes 020-034)

4.00(sizes 044-064)

10.If the number of compressor stages displayed is incorrect, then enter the correct number. Input 2.00 for sizes 020- 034 or 4.00 for sizes 044-064, then Press ENTER . The display will show:

Compressor Stages

2.00(sizes 020-034)

4.00 (sizes 044-064)

11.Press STAT . The LID display will show: Hardware Points

12.Press STAT again. The LID display will show: Software Points

13.Press ENTER . The LID display will show: Compressor 1 Status

14.Press 6 times. The LID display will show: Factory/Field Test

Stop

15.Press 1 then ENTER , The LID display will show: Factory/Field Test

Start

NOTE: At this point, the yellow warning light on the display panel will be lit and will stay on throughout the run test. After each successful step, the red alarm light will blink once.

16.The control module will now check if there is input from DHS, FSD, SAT, DSP, and CSMUX.

If the control does not receive open/closed/in range/in range/in range, the red alarm LED will go on and the test will stop.

If the inputs are okay, the red alarm LED blinks once and the test continues.

17.Next, the control forces the supply fan (SF) and all of the compressors (COMP) off, and waits 15 seconds.

18.The control forces SF on and SPEED to 20 percent and then waits 30 seconds.

If the VFD display shows: 12.0 Hz, the remote and auto LEDs blink, and the fan goes on, then the red LED on the control module blinks once and the test continues.

19.The control forces SF on and SPEED to 35 percent and then waits 30 seconds.

If the VFD display shows: 21.0 Hz, the remote and auto LEDs blink, and the fan goes on, then the red LED on the control module blinks once and the test continues.

20.The control forces SF off then waits 15 seconds.

If the VFD display shows: Off, the remote and auto LEDs are off, and the fan goes off, then the red LED on the con- trol module blinks once and the test continues.

NOTE: The steps below will be completed for the number of compressors configured.

21.The control forces CMP1 (compressor 1) on then waits 5 seconds.

If CSMUX is not in range, the red LED will go on and the test will stop.

If CSMUX is in range, the red LED blinks once and the test continues.

22.The control forces CMP1 off.