Weller WHA900 - Manual (Page 4)

Thank you for placing your trust in our company
by purchasing the Weller WHA900 Hot Air Station.
This product meets or exceeds the requirements
established by Weller for superior performance,
versatility and quality.
1. Cautions! / Warnings!
Please read these Operating Instructions and the
attached Safety Information carefully prior to initial
operation. Failure to observe the safety warnings
may result in accident, injury, or risk to health.
The manufacturer shall not be liable for damage
resulting from misuse of the machine or unautho-
rized alterations.
Warning: This product when used for soldering
and similar applications, produces chemicals
known to the State of California to cause cancer
and birth defects or other reproductive harm.
Safety Information:
● Always place the soldering iron in its original
holder
●
Remove all inflammable objects from the prox-
imity of the hot soldering tool.
●
Use suitable protective clothing to prevent the
risk of burns associated with molten solder.
●
Never leave a hot soldering iron unattended.
● Never work on electrically live circuits or com-
ponents.
●
Always wear eye protection when working with
soldering and desoldering applications.
The Weller WHA900 Hot Air Station corresponds
to the EC Declaration of Conformity in accordance
with the basic safety requirements of Directives
89/336/EEC and 73/23EEC.
2. Description
The WHA900 hot air station was developed for
general soldering re-work on Surface Mount com-
ponents. The temperature of the hot air is con-
trolled electronically and is variable between
100°F and 1000°F. 120 VAC (8) is required to
operate the unit. The air flow is variable electroni-
cally within the range of approximately 5-50
l/minute and is generated by a self contained
pump. The hot air is activated using the Start/Stop
Push Button, (5) at the front of the unit.
The WHA900 is grounded through the 120 VAC
three wire power cord.
Standby mode:
This unit has a power-on function to activate a
Standby Mode (or secondary temperature airflow
setting). Before switching on the unit, choose the
Temperature and the Airflow settings that you
would prefer to use for the Standby Mode of oper-
ation.
Activating Standby:
Adjust the Temperature and Airflow control to the
desired Standby setting. Depress the Start/Stop
push button and hold while switching on the unit.
Keep the button depressed for approximately 5
seconds after turning the unit on. The pump will
start and the Standby function is activated. When
the unit is switched on, the Temperature and the
Airflow will be set to the Standby values. When
you depress the Start/Stop push button, the
Airflow and Temperature will go to the actual “Set”
values. The actual “Set” values should be set at a
normal Temperature and Airflow settings capable
of performing the rework application. Depress the
button again and the unit will go back to the
Standby values.
Note: To change the Standby settings, you must
first Deactivate Standby Mode as described
below.
Deactivating Standby:
If the Standby function is activated, depress the
Start/Stop push button while switching on the unit.
Keep the button depressed for about 5 seconds.
The unit is now in the original operating mode.
Repeat the “Activating Standby” directions to
assign new preferred settings.
3. Placing Into Operation
Note: Safety rest must be formed before tool use.
Place the hot air pencil in the formed safety rest
with the nozzle in a raised position to prevent
damage to work bench. Check to be sure the sup-
ply voltage is consistent with the information on
the station label. Before connecting to the 120
VAC power source, set the desired temperature
(2) and the air flow on (3) and switch on the unit
at the power switch (4). The LED will flash slowly
to indicate the unit has reached the Set
Temperature.
English
2