6
SECTION 4 OPERATION
WARNING
Never leave the 240-Vac AA-400 Mark
IV super heater running unattended.
Step 1
With the heat gun nozzle cool and
power disconnected to the AA-400
Mark IV, install the appropriate
reflector tip (needle point, SolderSleeve,
Mini SolderSleeve, low flow, or boot
and tubing) required for your
application. Refer to Section 1 of this
manual and Step 6 in this section for
details on the available reflector tips.
Step 2
Follow Steps 1–3 of the Installation
Procedure (see Section 3) to prepare the
AA-400 Mark IV for operation. When
not using the heat gun, place it in its
stand to avoid possible heat damage to
the surrounding area.
CAUTION
Avoid aiming the hot air stream at the
control unit, hose, or power cord.
Step 3
If the air temperature appears to be too
high for your particular application,
increase the air pressure. If the air
temperature is still too high at the
maximum
pressure setting, it will be necessary to
reduce the voltage with a variable
transformer capable of handling a
400-watt load.
Step 4
If the air temperature appears to be too
low for your particular application,
decrease the air pressure.
If the air temperature is still too low at
the minimum pressure setting, check the
mains source voltage.
CAUTION
If it is necessary to use a variable
transformer to correct for a low-voltage
problem, do not exceed the 240-Vac
rating.
Step 5
For SolderSleeve applications, the end
of the nozzle or attached reflector
should be about 7 to 12 mm away from
the device. The hot air stream should be
directed at the solder band. Closer
placement of the nozzle tip can result in
browning of the tubing or spurting of
the melted solder.
Step 6
The needle-point, low-flow-point,
SolderSleeve, and Mini SolderSleeve
reflector tips are designed to slip over
the small-diameter end of the nozzle.
The
needle-point tip reduces the heated air
flow rate and air stream by about 50
percent. The low-flow tip reduces the
heated air flow rate about 70 percent in
a similar fashion. The SolderSleeve
reflector tip distributes all of the heated
air around the slot opening for uniform
heating of standard- size SolderSleeve
devices. The Mini SolderSleeve
reflector tip concentrates the hot air
flow in a small area for smaller
SolderSleeve devices.
The boot and tubing tip is designed to
slip over the large-diameter end of the
nozzle, so that the cooling air emitted
from the eight small holes mixes with
the hot air. This reduces the air
temperature to approximately 93°C and
significantly increases the air flow rate,
for recovering Thermofit heat-
shrinkable molded parts and tubing.
Step 7
To turn the AA-400 Mark IV off, follow
Step 5 of the Installation Procedure.
CAUTION
Never disconnect an operating AA-400
Mark IV from its air supply without first
allowing the element to cool, as
directed in Step 5 of the Installation
Procedure (see Section 3). Failure to
observe this procedure will reduce
the element’s product life and could
lead to melting of the gun assembly
plastic handle.
Raychem Interconnect a division of Tyco Electronics International Ltd. Printed in USA No.: TUS-44-3300 Revision: None
Revision Date: February 16, 2000 Page: 6 of 8
Summary of Contents for Raychem Interconnect AA-400 Mark IV
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