Tech Notes


1. Park trailer with rear wheels level. Lower both trailer support legs using appropriate load
bearing support under each leg if not on concrete. If site is reasonably level, trailer can be disconnected from the tractor at this point. Before disconnecting tractor, block the trailer wheels front and back.

NOTE: Leave 10í side clearance between units or other obstructions for proper maintenance access.

2. Level the trailer length-ways using the support legs. Recheck transverse level as in step 1. (Good leveling of the trailer facilitates motor/compressor alignment later.)

3. Connect the compressor unit (4Ē Ė 125# flange) to the air system by means of a suitable hose, piping, and discharge block valve. If sir system is wet, a drip leg should be put in the discharge piping and used to keep the wet air from feeding back to the compressor and damaging the control system.

4. Connect the main 460 volt power. This wiring should be installed per national and local codes. Extra care should be taken where the wires go through the trailer floor to insure the wires are protected from rubbing a hole in the insulation. The wiring and transformer must be properly sized and protected from breakers. For multi-unit installations, each unit should be equipped with a breaker. This protects that unitís wiring and allows safe access to the switchgear should any maintenance be required. Customer electrical equipment should be sized to provide 460 volts to 2000 starting amps and 550 running amps. The unit is protected with an under-voltage device that will prevent the unit from operating if the voltage dips below 410 volts.

5. Connect the electrical ground strap.

6. Minimum operating pressure on the unit is 60 psig. If the system is going to operate at a lower pressure, customer must provide some means of maintaining this back pressure. Also, in this case, the customer must pipe instrument air to the unit, since 80 psig minimum control air is required for the proper operation of the unit.

7. In order to minimize the Customerís start-up time and expense, steps 1 through 6 should be completed prior to arrival of the AirNow service representative. Also, in the interest of getting the unit on line as fast as possible and keeping start-up expense to a minimum., please note that the AirNow service representative may need assistance (millwright, electrician and instrument man) in performing pre-start checks including the following:

a. Verify trailer is level.
b. Check/reset alignment of main drive motor to compressor.
c. Check motor rotation. (Main leads may need to be switched).

8. The unit will be started by the AirNow service representative after the pre-start checks have been completed. After making certain the unit is operating properly, the service representative will monitor the unitís operation and log readings for 2 hours. This is an ideal time to begin training of operating and maintenance personnel. Training will continue until the customer is satisfied with the unitís operation and his personnel are trained.

HINTS FOR BETTER OPERATION: This air cooled unit operates best in an ambient range of 20 degrees F to 100 degrees F; therefore, placement of the unit in the plant is important. During the summer, avoid putting the unit in an area that has temperatures higher than ambient. Locate the unit in as clean an environment as possible. This will prevent external fouling of the coolers and also help avoid premature clogging of the air filters and possible damage to the unit.




AirNow Industrial Compression Services
10440 N. Central Expy, Suite 1010
Dallas, TX 75231
Phone: 1-972-861-1200