Nordson HORIZON 200, Руководство по эксплуатации продукта

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Operation
3-6
Part 106913 − 04
E 2018 Nordson Corporation
Fan Damper Adjustment
The fan damper is used only on the Horizon 400 booth. The fan damper
controls air flow through the booth. If the air speed and volume are too low,
oversprayed powder can escape into the spray room through the enclosure
openings. If the air speed and volume are too high, the sprayed powder will
be pulled away from the workpieces.
See Figure 3-3. Use the fan damper hand wheel (5) on the front of the fan
section to adjust the fan damper. To open the damper and increase the
flow, turn the wheel counterclockwise. To close the damper and decrease
the flow, turn the wheel clockwise. Six full turns of the wheel move the
damper from fully open to fully closed.
1. Turn on the exhaust fan.
2. Turn the hand wheel counterclockwise until the damper is fully open.
3. Measure the air velocity at the entry and exit vestibules with a
velometer. The velocity should be 30 − 37 m/min (100 − 120 fpm).
4. If the air velocity is too fast, turn the hand wheel one full turn clockwise.
Measure the air velocity again. Continue closing the damper opening
until the velocity is 30 − 37 m/min (100 − 120 fpm).
5. Coat a few workpieces. Watch the powder spray pattern and look for
powder escaping from the enclosure openings.
a. If the sprayed powder is being pulled from the guns and workpieces,
close the damper.
b. If powder is escaping from the enclosure, open the damper.
NOTE:
The air flow through the cartridge filters will slowly decrease as fine
powder particles clog the filter media. Check the air velocity at the
enclosure openings periodically and adjust the fan damper to compensate.
6. Adjust the damper until the air velocity is fast enough to contain the
powder within the enclosure without pulling the sprayed powder away
from the guns and workpieces.
Feed Hopper Level Sensor Calibration
The level sensor is a capacitive proximity switch. When you install a new
sensor, you must calibrate it.
NOTE:
Replacement sensors are shipped configured as normally
closed (N.C.) switches.
1. See Figure 3-5. Insert the level sensor into the plastic mounting well (1)
in the side of the feed hopper until it bottoms out, then tighten the plastic
screws on the side of the well to hold the sensor securely.
2. Make sure system power is on and the exhaust fan is running.
3. Open the feed hopper lid and fill the hopper
2
/
3
full of powder.
4. Increase the hopper fluidizing air pressure to 0.7 − 1 bar (10 − 15 psi). The
powder level should rise above the top of the mounting well as the
powder fluidizes. Add powder to the hopper if it does not.