Duncan Enviro DD30 Manual do Proprietário - Página 16

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Airflow and Fan Settings

1. Hydraulic Fan -connect the hoses in the following order:

First - connect Zero pressure Case Drain 3/8" hose (1/2" BSP Female QR) to hydraulic

reservoir *

Second -connect Motor Return 3/4" hose (3/4" BSP Female QR) to tractor high flow low

pressure return port.

Finally - connect High Pressure Motor Feed 1/2" hose (1/2" BSP Male QR) to tractor

remote.

Disconnect in the reverse order to prevent motor seal damage.

*The tractor hydraulic reservoir or free drain connection must have zero backpressure.

2. A higher fan speed is usually required to correctly deliver high rate or heavier product such as

fertilizer from the front box. The airflow to the rear box is reduced by setting the butterfly valve

to the approriate position as shown in the table. If this is not done the seed delivered to the disc

units from the rear box may well bounce out of the seed slot.

The following table shows box fill combinations, butterfly position and recommended fan speeds

for normal/fine seeds and fertilizer:-

Box contents

FRONT

seed (Normal) seed (Normal)

seed (Normal)

seed (Fine)

Fertilizer

seed (Normal)

Fertilizer

seed (Fine)

'Enviro DD30'

Butterfly Position (affects rear box) Fan Speed/rpm*

REAR

open - 5

closed - 1

closed -2

closed - 1

Airflow & Fan Speed

3000

3000 to 3500

* MAXIMUM

PERMISSABLE

FAN SPEED

4000 RPM