Wolf KG Standard, Installation And Maintenance Instructions Manual

14

3040530_201503

Commissioning

Fan section

Fixing screws  

for V-belt pulleys

Adjustable pulley

Locking screw

ca

.

1

5

m

m

KG 40-100

V-belt

tensioning 

screw

In accordance with DIN EN 1886, the unit must be opened with tools. Wait for 

the fan to come to a complete standstill before opening the inspection doors. 

When the doors are opened, negative pressure may draw in loose objects, 

which could destroy the fan or even cause a risk to life if items of clothing are 

drawn in.

Check that safety equipment such as V-belt or protective door grilles and 

monitoring equipment is fitted and functions correctly.

-  Commissioning may only be carried out if the ducts are connected and the 

inspection doors are closed. Otherwise there is a risk of motor overload.

-  Check that the V-belt pulleys and locking screws in the clamping bushings 

are firmly seated.

  Adjustable V-belt pulleys are not set before the unit is delivered, so must be 

adjusted accordingly on site when commissioning the air handling unit.

  They allow the fan speed to be changed by 10 %.

 Setting:

  To alter the pulley diameter, the adjustable pulley can be moved axially on a 

threaded shaft (see adjacent diagram). 

  To do this, the V-belt must be slack and the locking screws in the adjustable 

pulley need to be undone using an Allen key. After adjusting the pulley, firmly 

retighten the locking screws and adjust the V-belt tension correctly. When 

tightening, both locking screws must rest on the flattened threaded shaft.

-  Check that the V-belt has the correct tension

  (for retightening, see chapter on Maintenance).

  The V-belt pulleys must be in perfect alignment.

-  Turn ON the ON/OFF switch.

-  Check the rotational direction of the fan impeller by briefly switching on the 

drive motor. Correct the rotational direction if required.

  Proceed with the utmost caution as it is necessary to open the door to the 

fan section for these steps. There is a risk that loose objects may be drawn 

in, which could destroy the fan or even cause a risk to life if items of clothing 

(ties) are drawn in.

-  Check the air volume. Check the pressure drop. 

-  Check the power consumption of the fan motor: 

  The motor current and motor rating must not exceed the values specified 

on the motor type plate. It is imperative that the maximum specified 

fan speed is not exceeded as otherwise the motor and fan would be 

destroyed by this overload and undone or flying parts could destroy 

other components.

Regarding air handling units with a controllable motor and/or variable recirculating 

air section, the maximum power consumption in the entire control range must 

be checked.

If necessary, correct the air volume by replacing the pulleys (with adjustable 

pulleys, alter the pulley(s); see above).

Please note

Please note

Please note