Ametek Direct Drive Regenerative Blower DR858BB86X

Start of Blower Reassembling Procedure

Assembled motor placed against the rear of the housing and fastened with bolts and washer

Impeller re-shimmed according to the Impeller Shimming Procedure

Impeller placed onto the shaft with the shaft key in place and fastened with bolt, washer and spacer

Enter the torque value used for the impeller bolt

Impeller rotates freely after fastening

Cover replaced and fastened with bolts

WARNING: This unit may be difficult to shim. Extreme care may be exercised.

Tools Needed: Machinist’s Parallel Bar, Vernier Caliper with depth measuring capability, Feeler gauges or depth gauge

Distance from the flange face to the housing (A)

Distance from the flange face to the motor shaft shoulder (B)

Measurements (A) and (B) are made by laying the parallel bar across the housing flange face and measuring to the proper points. Each measurement should be made at three points, and the average of the readings should be used.

After the impeller installation (step #4 below) the impeller/cover clearance can be checked with feeler gauges, laying the parallel bar across the housing flange face. This clearance should nominally be (A-C)/2.

Place the impeller onto the shaft making sure the shaft key is in place and fasten with the bolt, washer and spacer as applicable. Torque the impeller bolt per the table on page 5. Once fastened carefully rotate the impeller to be sure it turns freely.

WARNING: Attempting to repair or diagnose a blower may void Rotron’s warranty. It may also be difficult to successfully disassemble and reassemble the unit.

1) Disconnect the power leads. CAUTION: Be sure the power is disconnected before doing any work whatsoever on the unit.

2) Remove or separate piping and/or mufflers and filters from the unit.

3) Remove the cover bolts and then the cover. NOTE: Some units are equipped with seals. It is mandatory that these seals be replaced once the unit has been opened.

4) Remove the impeller bolt and washers and then remove the impeller. NOTE: Never pry on the edges of the impeller. Use a puller as necessary.

5) Carefully note the number and location of the shims. Remove and set them aside. NOTE: If the disassembly was for inspection and cleaning the unit may now be reassembled by reversing the above steps. If motor servicing or replacement and/or impeller replacement is required the same shims may not be used. It will be necessary to re-shim the impeller according to the procedure explained under assembly.

6) Remove the housing bolts and remove the motor assembly (arbor/.housing on remote drive models).

7) Arbor disassembly (Applicable on remote drive models only):

Warning: This procedure requires trained personnel with PPE!

Select the type of muffler material used

Muffler pads slid over the screens

Procedure reversed and reassembled

Sign off on the muffler material replacement