Downdraft Bench, DB-800
6
1. Make the electrical connections to the customer-
supplied safety disconnect switch, blower, and
blower starter.
2. Turn power ON at source.
3. Turn the blower motor ON then OFF to check for
proper rotation by referencing the rotation arrow
located on the blower housing. A blower running in
the wrong direction will still deliver approximately
40% of its rated air volume making proper rotation
extremely important.
To reverse rotation, single-phase power supply:
Follow manufacturer’s instructions on the motor’s
nameplate.
To reverse rotation, three-phase power supply:
Turn electrical power OFF at source and switch any
two leads on the output-side of the fan-motor starter.
1FU
2FU
3FU
1M
1OL
1T2
1T3
fan
motor
Disconnect
L1
L2
L3
1T1
1L1
1L2
1L3
208/230/460/575/60/3
Motor Starter Wiring Diagram
Industrial Light, Three-Phase Units
1. Wire the light fixture to a 120-Volt power supply.
2. Install customer-supplied fluorescent bulbs.
Hinged Side Panels
The DB-800 is equipped with right and left, lift-off hinged
side panels. Open or remove panels when working with
items too large or awkward for the work surface. Keep
the panels closed under normal operating conditions.
light fixture
L2 to Neutral
L1 to Power Lead
Single Phase Units
lights are prewired
Three Phase Units
wire light to 120-Volt power supply
Light Fixture Wiring
1FU
2FU
3FU
1M
1OL
1T2
1T3
fan
motor
Disconnect
L1
L2
L3
1T1
1L1
1L2
1L3
208/230/460/575/60/3
