Initial Operation - Wolf KGW Series Installation And Maintenance Instructions Manual

Fan section
Securing screws for
Vee-belt pulley disks
Locking screw
Adjustable disk
KG 40-100
Vee-belt
tensioning screw
KG 160-250
Louver flaps
Switch S
for reversing direction
of rotation

Initial operation

Wait until the fan or fans run down to a complete standstill before you open the
inspection door.
Check that safety devices and monitoring devices are correctly installed and fully
functional.
- Do not start the unit until all ducts have been connected and the inspection doors
closed. Otherwise, there is a danger of motor overload.
- Check that the Vee-belt pulleys and the locking screws of the clamping sleeves
are secure.
The adjustable Vee-belt pulley disks are not adjusted before the unit leaves the
Caution
factory. The disks have to be adjusted on site before the air-conditioning unit is
started for the first time.
This adjustment allows for a 10% change in the speed of the fan.
Adjusting:
The effective diameter of the pulley can be changed by moving the adjustable
disk axially on a threaded adapter (see drawing on left).
To adjust the disk, relieve the tension of the Vee belt and use an Allen wrench
to slacken the securing screws on the adjustable pulley disk. Adjust the pulley
disk, retighten all screws and tension the Vee belt. Make sure that both securing
screws are seated against the flats of the threaded adapter.
- Check that the Vee belt is correctly tensioned (See Page 18 / Maintenance for
instructions on tensioning the Vee belt).
Make sure that the Vee-belt pulleys are in correct alignment.
- Switch on the mains switch.
- Briefly switch on the drive motor and check that the fan impeller's direction of
rotation is correct. Reverse the direction of rotation if necessary.
The inspection door of the fan section has to be opened for this purpose, so
proceed with the utmost caution.
- Measure the air throughput. Check pressure losses.
- Measure the current draw of the fan motor: Make sure that the motor current
does not exceed the value stated on the motor rating plate.
Caution
If the air-conditioning unit has a variable-speed motor and/or variable recirculating-
air section, measure maximum current draw over the entire variable-speed
control range.
If necessary, correct the air throughput rate by changing the Vee-belt pulleys (or
by adjusting the variable pulleys, if fitted, see above).
Check that all louver flaps and linkages move easily.
Check that the flap positioning motor(s) of the louver flap(s) rotate in the correct
direction. If necessary, reverse the direction of rotation by means of switch S (see
illustration on left).
If the unit has internally fitted flaps, consult the enclosed installation instructions
for the flap positioning motor.
15