Wolf KG Gigant Series Installation And Maintenance Instructions Manual page 15

Fan section
Fastening screws for pulley
Adjustable pulley
Locking screw
KG 40 - 100
KG 160 - 400
Shutter flaps
Sliding switch S
for changing the rotational
direction
Commissioning of the unit
Wait until the fan(s) has (have) stopped before opening the inspection
doors.
Check for correct installation of safety and control equipment.
- The unit may only be started once the ductwork is connected and the
inspection doors are closed. Otherwise the motor may be overloaded.
- Check for secure seating of pulley. For pulleys in tensioning bushings,
check also the locking screws of the bushings.
Adjustable pulleys are not set by the manufacturer and must be adjusted
Caution
accordingly on site before starting the air-conditioning unit.
These pulleys allow a fan speed variation of 10%.
Adjustment:
To adapt the pulley diameter, the adjusting pulley can be axially moved on
a threaded section (see adjacent illustration).
For this purpose, the V-belts must be loosened and the securing hexago-
nal locking socket screws of the adjustable pulley must be unscrewed.
After adjustment of the pulley, the locking screws must be re-tightened
and the V-belt must be retensioned. During tightening, both locking screws
must lie on the flattened threaded section.
- Check V-belt for correct tension (for retensioning see page 18 /
maintenance),
V-belt pulleys must be completely aligned.
- Switch on main switch.
- Check for correct rotational direction of fan rotor by briefly switching on
the drive motor. Change rotational direction, if necessary.
Extreme care should be taken as the doors of the fan must be opened for
this operation.
- Measure the air volume. Check the pressure loss.
- Measure the current drawn by the fan motor: The current may not exceed
the value specified on the motor rating plate.
For air-conditioning units with controllable motors and/or variable
Caution
recirculating air content, the highest current take-up throughout the entire
control range must be measured.
If necessary, correct the air volume by changing the pulley (in case of
adjustable pulleys, readjust the pulley(s), see above).
Check that shutter flaps and linkages move easily.
Check for correct rotational direction of drive motor(s) of the shutter flap(s)
and correct with sliding switch S (see illustration).
For internal flaps, pay attention to the assembly instructions for the flap
actuating motor supplied separately.
Gigant
15