Downflo Workstation, DWST 4-1 to 6-4
A24
Instruct all personnel on safe use and maintenance procedures.
Electrical work during installation, service or maintenance must be performed by a qualified electrician and comply
with all applicable national and local codes.
Turn power off and lock out all power before performing service or maintenance work.
Turn compressed air supply OFF, bleed and lock out lines before performing service or maintenance work.
Check that the collector is clear and free of all debris before starting.
Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Start-Up/Commissioning Collector
Once the DWST has been placed, anchored and connected to electrical power, compressed air and connected to booth assembly
if applicable, the collector is ready for initial start and commissioning.
1. Check all electrical connections for tightness and contact.
2.
Check that fan wheel set screws are properly torqued (10.5 foot pounds for 3/8-in stainless steel set screws and 25 foot
pounds for 1/2-in stainless steel set screws) prior to initial start-up.
Set screws on fan wheels must be properly tightened to avoid severe personal injury and/or property damage.
3. Check for proper rotation as noted on the fan housing.
Do not look into fan outlet to determine rotation. View the fan rotation through the back of the motor.
Check that the exhaust plenum is free of tools or debris before checking blower/fan rotation.
Stand clear of exhaust to avoid personal injury.
Do not interchange a power lead with the ground wire. Severe personal injury and/or property damage may result.
a. “Bump” the fan to initiate rotation. Momentarily hit the ON button followed by the OFF button.
b.
As the fan is winding down (unpowered) use a flashlight to visually observe the direction of fan rotation through the roof
opening.
c.
Compare fan rotation to the rotation label (located adjacent to the fan) direction.
4.
If the fan rotation is reversed, correct the rotation.
To reverse rotation, single-phase power supply: Follow manufacturer’s instructions on the motor’s nameplate.
To reverse rotation, three-phase power supply: Switch any two leads on the motor junction box.
a. Turn off the collector and Lock-Out all energy sources.
b.
Within the top mounted junction box, swap the connection location of two power leads on the terminal block, making
certain not to swap a power lead and the ground wire.
Do not interchange a power lead with a ground wire or severe personal injury and/or property damage may result.
