Donati DRH 1 Series Instructions For Use Manual Download

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MAN16MG05

instructions

for

use

series

drh

1/2/3/4 -

dst

drt

1. Check that the movements of the hoist correspond to the indications shown on the respective ascent and descent

buttons of the push-button control panel:

• push, with a quick movement, the ascent button and check that the hook goes up

• do the same operation with the descent button, the hook should go down

2. Remove the protection canopy

-1-

, only on the limit switches side, by unscrewing the screws

-2-

(fig. 92).

3. Bring the hook block to the required position of maximum ascent or maximum descent.
4. Loosen the screws

-3-

so that the ascent limit switch

-4-

or the descent limit switch

-5-

can freely run along the

section bar

-6-

and position the ascent limit switch, and/or descent limit switch, in the most suitable position, so

that they intervene when the hook block is in the required position (fig. 93).

5. Tighten the fixing screws completely so that the ascent limit switches and/or descent limit switches stay firmly

positioned in the prefixed position.

6. Let the hook block run for the entire predetermined hook run, do repeated ascent and descent test runs activating

the respective limit switches and checking the correct intervention once the point of the striker plate has been
reached in ascent and descent.

7. Check, according to the foreseen configuration, that the height of approach of the hook going up is not less than

that stated in point 2.2.9 (Height

-Height

8. Put back the protection canopy at the end of the operation.

• If this does not happen stop the movement of the hoist and invert the connection of the two phases in

the line terminal block of the control board.

• Do not intervene on the internal connections of the hoist or push-button panel

• If the direction of rotation of the motors does not correspond to the controls, the limit switches do not

halt the movement and situations of DANGER can occur!

• The adjustment of the descent limit switches MuST NOT allow the lower edge of the hook to go less

than a distance of 200 mm from the ground (fig. 94).

• The adjustment of the hook in the maximum descent position MuST always ensure a minimum of 3

turns of wire rope completely wound on the drum (fig. 95).

fig. 92

fig. 93

fig. 94

fig. 95

200 mm

instructions

for

use

series

drh

1/2/3/4 -

dst

drt

MAN16MG05

1. Check the correct positioning of the actuators of the electric limit switches of the trolley (fig. 96).
2. Ascertain that the run of the trolley is the one required and, if necessary, adjust the limit switches.

• The test run of the limit switches is carried out by bringing the trolley to the extreme limit of its run on the

girder using the right/left buttons. Do the test run several times, the trolley should stop in the prefixed
position and ensure an adequate ”over run”, before reaching the mechanical stops on the ends, and avoid
the collision of the hoist with the fixed structures (fig. 97).

• Check the correct positioning of the mechanical striker plates on the ends of the girder which must be

adequate for the potential impact with the rubber absorbers of the trolley if the electric limit switches
should fail to work (fig. 98).

• Ensure the adequate positioning of any pre-slowing down devices in the case of 2-speed trolleys, to avoid

reaching the striker plates of the limit switches on the ends at maximum speed (fig. 99).

Adjusting the limit switch devices of the trolley (if part of the supply):

All the LIFTING AND TRAVELLING automatic limit switches are emergency controls with safety functions

and not for working and MuST NOT be subjected to habitual and/or continuous use.

If habitual and/or continuous use is required, supplementary limit switches for operational service must

be installed, fitted so that they act before the emergency limit switches.

fig. 98

fig. 99

fig. 96