Dictator 790050 Технічний посібник - Сторінка 13

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Check of Alignment

Tensioning of Belt

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Installation of the DICTAMAT AC 900-21, cont.

Insert the toothed belt/chain into the other clamping plate of the

belt/chain fixing device, guide the belt through the oblong hole

downwards and pretension it by pulling manually. Tighten the

screws of the camping plate.

Check the exact alignment of door operator, idler pulley and belt

fixing device. If they should not be aligned in one line, adjust the

position and then tighten all screws hard.

Now finally tension the toothed belt/chain with the lateral screw

on the idler pulley as follows (see illustration 2):

1. Loosen screw no. 1 (M10 SW17)

2. Tension the toothed belt with screw no. 2 (M10 SW17)

3. Tighten screw no. 1 (40 Nm)

Put back the cover over the driving wheel of the door operator

and fix it. Please make sure the toothed belt/chain does not rub

against the cover.

Technical Manual

DICTAMAT AC 900-21

Belt coming-off

prevention device

Ill. 2

Ill. 3

Page 04.020.03