Open Plenum Array
6
Unit Start-Up
WARNING
Disconnect and secure to the “Off” position all electrical power to the array prior to inspection or servicing. Failure
to comply with this safety precaution could result in serious injury or death.
Visual Inspection of Equipment
The equipment type and arrangement should be verified as ordered at once when it arrives at the jobsite. When
a discrepancy is found, the local sales representative must be notified immediately so that corrective action may
be investigated, also verify electrical conformance to specifications. Unauthorized alterations and unauthorized
backcharges will not be recognized by the manufacturer.
After the array has been assembled, installed and all utilities have been hooked up, the unit is now ready for
operation.
Check
Before starting the array, check the following:
1. Confirm that building supply voltage matches the voltage for which the unit is wired.
2. Disconnect and lock-out all power switches to array. See warning below.
3. Check all piping and wiring penetrations made by contractors for water tightness. All penetrations must be made
watertight to prevent water damage to the unit and building.
4. Check all fasteners, set screws and locking collars on the array, bearings, drive, motor base and accessories for
tightness.
5. Rotate the wheel by hand and assure no parts are rubbing. Remove any dirt or debris that may have accumulated
during installation.
6. Check all guarding (if supplied) for being securely attached and not interfering with rotating parts.
7. Check all electrical connections for proper attachment.
8. Check for obstructions and foreign material that may damage the wheel.
Wheel Removal / Installation (Continued)
Backward Curved Aluminum Wheel (Mill Finish)
Unit Size
TaperLock
Bushing
Fastener
Torque
Screws
lb-ft
315
SM12/BF16
15
3/8
355
SM12/BF16
15
3/8
400
SM12
15
3/8
450
SM12
15
3/8
500
SM20
22
7/16
560
SM20
22
7/16
630
SM20
22
7/16
Airfoil Aluminum Wheel (Mill Finish)
Unit Size
TaperLock
Bushing
Fastener
Torque
Screws
lb-ft
315
BF16
15
3/8
355
BF16
15
3/8
400
SM16
15
3/8
450
SM16
15
3/8
500
SM20
22
7/16
560
SM25
39
1/2
630
SM25
39
1/2
To Remove:
1. Remove all screws. Oil threads and points of set screws or
threads and under heads of cap screws.
2. Insert screws into holes that are threaded on the bushing side
(shown as
on image). In sizes where washers are found under
the screw heads, be sure to use the washers. Note that one
screw in each hub is leftover and is not used in the loosening
operation.
3. Tighten screws alternately until bushing is loosened in hub. If
bushing does not loosen, tap on face of hub.
