CONTINUATION OF THE RETROFIT OVERVIEW:

COMPLETION OF MEDIA INSTALLATION: As each section of media is installed secondary spokes are positioned in place to limit any shifting of the media.

The media is then positioned so that it is within + or - 1/32"of overall flatness. Each rim is given enough tension so that the media can be moved into position for the desired flatness.

RIM TENSIONING: Rim tensioning and getting a flat wheel are interrelated. With the exclusive, THERMOWHEELTM.* tensioning system, tension can gradually be applied to each section of the media independently. Here you can see how the rim tension bolts act to pull the rims together so that there is proper tension on each section.

COMPLETING THE ROTOR: Here the completed rotor is seen as the rim tensioning is in progress.The meida is positioned so that it is within + or - 1/32" of overall flatness. Each rim is tourqued in place and the secondary spokes are permanently installed. Now that the rotor is complete, move on to the motor drive and belts.

DRIVE INSTALLATION: The motor drive is mounted on a hinged plate which allows the motor to move vertically. It is the weight of the motor that tensions the twin "V" belts. This configuration is foolproof. There is no need for springs or adjustments. Let gravity do the work.

Note how the motor is very accessible. A sealed compartment is provided for the drive. The drive is a variable frequency design that provides the full range of rpm needed.

CONTROL INSTALLATION The controls are usually mounted on the outside of the air-handler. Depending on the type of unit, Thermotech can provide sensors in all 4 air-streams and interface to any existing control system. Thermotech can provide the right control for any facility. After the controls are installed the unit is operated at all specified speed settings and the controls are set so that the proper supply air temperature is met. That does it, the installation is complete.