Caution; Description; Technical Data; Commissioning - Weller WHA 900 Mode D'emploi

English
Thank you for placing your trust in our company by purcha-
sing the Weller hot air station WHA 900. Production was
based on stringent quality requirements which guarantee the
perfect operation of the device.

1. Caution!

Please read these Operating Instructions and the attached
Safety Information carefully prior to initial operation. Failure
to observe the safety regulations results in a risk to life and
limb.
The manufacturer shall not be liable for damage resulting
from misuse of the machine or unauthorised alterations.
The Weller hot air station WHA 900 corresponds to the EC
Declaration of Conformity in accordance with the basic safe-
ty requirements of Directives 2004/108/EC, 2006/95/EC and
2011/65/EU (RoHS).

2. Description

The WHA 900 hot air station was developed for gentle
soldering tasks on large-surface SM components with large
numbers of pins. The temperature of the hot air is
controlled electronically and is infinitely variable between
50°C and 550°C. 230 V mains voltage is required to operate
the unit. The air flow is infinitely variable electronically
within the range of approx. 5-50 l/min and is generated by
a turbine. The hot air is activated using the green button at
the front of the unit.
The heating element is grounded.
Standby mode
This unit has a power on function to activate a standby
(or additional temperature profil).
Before switching on the unit choose the temperature and
the airflow you want to use
for standby operation.
For example:
- Temperature poti at 150°C and airflow poti at position 1.
- Then push the green button during switching on the unit.
- Keep the button pressed for about 5 sec.
- The pump will start and the standby function is activated.
- Switch the unit off.
- Up to now if the unit will switched on heater temperature
will be 150°C. and the pump will run with airflow pos. 1.
- If you push the button the airflow and temperature will go
to the actuall set values.
- Push the button again and the unit will go back to the
standby values.
9
Deactivating standby:
If standby function is activated press the green button
during switching on the unit. Keep the button pressed for
about 5 sec. The unit is now in the original operating mode.

Technical Data

Dimensions:
(L x W x H mm) 210 x 170 x 110
Mains voltage: 230 V
Power consumption: 650 W
Hot air pencil output: 612 W
Fuse: T 4A
Temperature control: Infinitely variable between 50°C and
550°C
Control accuracy: ± 30°C
Flow control: Infinitely variable
between 5 - 50 l/min
Noise level: 56dB(A) distance 1m at max.
airflow level

3. Commissioning

Place the hot air pencil in the safety rest. Check whether
the mains voltage is consistent with the information on the
type plate. If the mains voltage is correct, connect the unit
to the mains.
Set the desired temperature on the rotary potentiometer (2)
and the air flow on the rotary potentiometer (3) and switch
on the unit at the mains switch (4). The LED will flash slowly
to indicate that the unit is in idle state. The set airflow and
temperature is activated after operating the push button.
The visual control check flashes rapidly. Heating-up time of
the nozzle depends essentially on the size of the nozzle and
the air flow.
Warning:
Do not point the hot air pencil at people or flammable
objects.

4. Operating guidelines

Nozzle change
Caution: Risk of burns!
The hot air nozzle remains hot for some time after switch
off or removal.
The hot air nozzles are fastened to the heating element
using a clamping screw. To change the nozzle, loosen the
screw and remove the hot gas nozzle using the nozzle
changer.