Masterflow
Heat Blower
®
Designers and Manufacturers
of Heat Tools for Industry
Fabricants d’outils chauffants
pour usages industriels
Diseñadores y fabricantes
de herramientas térmicas
para la industria
Instruction Manual
Mode d’emploi
Manual de instrucciones
Made in U.S.A.
Fabriqué aux États-Unis
Hecho en EE.UU.
Please read, understand and keep this manual for future reference
Lire et bien comprendre les instructions
contenues dans ce manuel et les conserver comme référence.
Por favor lea, comprenda y guarde este manual para futura referencia.
Description & Introduction
The Masterflow
®
Heat Blower
is a heavy-duty, industrial-
quality heat blower suitable for
continuous duty applications.
It produces a high volume of
hot air for demanding indus-
trial applications. The
adjustable stand features a
keyhole slot for easy equip-
ment mounting and allows the
nozzle capability of rotating
90° (horizontal to vertical).
Your Masterflow
®
is equipped
with a thermal fuse which will
protect the element from over-
heating or burn out due to
a nozzle blockage or motor
failure.
Heat blowers are a source
of extremely high tempera-
ture flameless heat (up to
750°/400°C). As with other
products which generate
extremely high tempera-
tures, regardless of your
specific application,
extreme care and caution
should be observed when
using this product.
Therefore, we recommend
that you pay particular
attention to the safety
instructions which we have
provided for your protection.
Specifications
*Temperature
Model
AH-301
AH-302
AH-501
AH-502
AH-751
AH-752
°F
300
300
500
500
750
750
°C
50
150
260
260
400
400
Volts
120
220/240
120
220/240
120
220/240
Amps
10.0
5.2
14.0
7.3
18.0
9.4
*Average temperature measures 1" from nozzle.
Important Safety Instructions
WARNING:
THIS PRODUCT
IS A SOURCE OF VERY
HIGH TEMPERATURE
FLAMELESS HEAT. AS
WITH ANY ELECTRICAL
TOOL, WHEN USING HEAT
TOOLS, ALWAYS FOLLOW
BASIC SAFETY PRECAU-
TIONS, INCLUDING THE
FOLLOWING, TO REDUCE
THE RISK OF FIRE, ELEC-
TRIC SHOCK OR PER-
SONAL INJURY.
1) Read and understand this
instruction manual before
using.
Save this manual for
future reference.
WARNING:
To reduce the
risk of fire or electric shock,
do not expose heat blow-
ers to rain or moisture.
Store indoors. Connect to
grounded outlet only.
2) Do not use plug adaptors or
remove the ground prong
from the plug. This tool is
equipped with a 3-prong
plug and a 3-wire grounding
system. Connect to prop-
erly grounded outlets only.
3) Use heat blower only on
adequately rated circuits to
avoid overheating of
electrical systems.
4) Masterflow Heat Blowers
can produce up to
750°F/400°C of flameless
2
heat out of the nozzle. Do
not direct this hot air stream
at your clothing, hands or
body parts. Do not use as a
hair dryer.
5) Do not touch nozzle open-
ing or nozzle shield until
cool. When in “Hot” mode,
extreme heat is generated
at those areas. Always hold
tool by the handle or use
permanently attached
stand.
6) Run on “Cold” before turn-
ing off. The nozzle and
shield require approxi-
mately 3 minutes to
become cool to the touch.
Important Safety Instructions
7) Do not touch work surface
with nozzle. Keep nozzle
face at least 1" away.
8) Keep a clean work area.
Messy or cluttered work
areas invite accidents or
injury.
9) Keep away from children. All
visitors should be kept at a
safe distance from the work
area. Do not let visitors touch
the tool or extension cord.
10) Use tool in a well-ventilated
area. Do not use near flam-
mable liquids or in an
explosive environment
(where fumes, gases or
dust are present).
11) Remove all highly flamma-
ble materials and other
debris from the work area.
12) Wear safety glasses at all
times.
13) When using an extension
cord, use only a 3-wire
grounded cord with a
minimum of 14-gauge
capacity. We recommend
they be listed by Under-
writers laboratories (UL)
in the U.S.A. or (CSA)
Canadian Standards
Association in Canada
and be suitable for out-
door use. Cords marked
for outdoor use are also
suitable for indoor use.
14) Don’t abuse cordset. Never
yank by cord to remove
from electrical outlet or
carry tool by cord.
15) Don’t remove adjustable
stand. When not hand-held,
place tool on a level sur-
face. Position cordset so it
does not cause tipping.
16) Keep a fully-charged fire
extinguisher close at hand.
(cont’d)
17) Do not leave heat blower
unattended while the heat
blower is running or cool-
ing down.
18) Stay alert. Do not operate
tool when you are tired.
Use common sense and
watch what you are doing.
19) Store properly. Do not
store while hot. Store in a
dry, high or locked-up
location. Keep out of the
reach of children.
20) Always unplug tool before
performing any mainte-
nance. When servicing,
use only Master Appliance
brand replacement parts.
We recommend that all
maintenance be per-
formed by a qualified
repair technician who is
experienced in the repair
of electric tools, a qualified
service organization, or
our repair staff.
21)
WARNING: This product,
when used for soldering and
similar applications, pro-
duces chemicals known to the
State of California to cause
cancer and birth defects or
other reproductive harm.
IMPORTANT SAFETY
INSTRUCTIONS
READ THESE INSTRUCTIONS
WARNING:
Hidden areas such
as walls, ceilings, floors, soffit
boards and other panels may
contain flammable liquids that
could be ignited by the hot air gun
when working in these locations.
The ignition of these materials
may not be apparent and could
result in property damage and
injury to persons. Do not use if in
doubt about this hazard. When
working in these locations, keep
3
the hot air gun moving in a back-
and-forth motion. Lingering or
pausing in one spot could ignite
the panel or the material behind it.
Paint Stripping
WARNING:
Extreme care
should be taken when strip-
ping paint. The peelings,
residue and vapors of paint
may contain lead, which is
poisonous. Any pre-1977
paint may contain lead and
paint applied to homes prior to
1950 is likely to contain lead.
Once deposited on surfaces,
hand to mouth contact can
result in the ingestion of lead.
Exposure to even low levels of
lead can cause irreversible
brain and nervous system
damage; young and unborn
children are particularly
vulnerable.
Before beginning any paint
removal process you should
determine whether the paint
you are removing contains
lead. This can be done by
your local health department
or by a professional who used
a paint analyzer to check the
lead content of the paint to be
removed.
LEAD BASED
PAINT SHOULD ONLY BE
REMOVED BY A PROFES-
SIONAL AND SHOULD NOT
BE REMOVED USING A
HOT AIR GUN.
Persons removing paint should
follow these guidelines.
1. Move the work piece out-
doors. If this is not possible,
keep the work area well
ventilated. Open the win-
dows and put an exhaust
fan in one of them. Be sure
the fan is moving the air
from inside to outside.
2. Remove or cover any car-
pets, rugs, furniture, cloth-
ing, cooking utensils and
air ducts.
3. Place drop clothes in the
work area to catch any
paint chips or peelings.
Wear protective clothing
such as extra work shirts,
overalls and hats.
4. Work in one room at a
time. Furnishing should be
removed or placed in the
center of the room and
covered. Work areas
should be sealed off from
the rest of the dwelling by
sealing doorways with drop
clothes.
5. Children, pregnant or
potentially pregnant
women and nursing moth-
ers should not be present
in the work area until the
work is done and all
cleanup is complete.
6. Wear a dust respirator or a
dual filter (dust and fume)
respirator mask which has
been approved by the
Occupational Safety and
Health Administration
(OSHA), the National
Institute of Safety and
Health (NIOSH), or the
United Stated Bureau of
Mines. These masks and
replaceable filters are
readily available at major
hardware stores. Be sure
the mask fits. Beards and
facial hair may keep masks
from sealing properly.
Change filters often.
DISPOSABLE PAPER
MASKS ARE NOT
ADEQUATE.
7. Use caution when operat-
ing the hot air gun. Keep
the hot air gun moving as
excessive heat will gener-
ate fumes which can be
inhaled by the operator.
8. Keep food and drink out of
the work area. Wash
hands, arms and face and
rinse mouth before eating
of drinking. Do not smoke
or chew gum or tobacco in
the work area.
9. Clean up all removed paint
and dust by wet mopping
the floors. Use a wet cloth
to clean all walls, sills and
any other surface where
paint or dust is clinging.
DO NOT SWEEP, DRY
DUST OR VACUUM. Use
a high phosphate deter-
gent or trisodium phos-
phate (TSP) to, wash and
mop areas.
10. At the end of each work
session put the paint
chips and the debris in a
double plastic bag, close
it with tape or twist ties,
and dispose of properly.
11. Remove protective cloth-
ing and work shoes in the
work area to avoid carry-
ing dust into the rest of
the dwelling. Wash work
clothes separately. Wipe
shoes off with a wet rag
that is then washed with
the work clothes. Wash
hair and body thoroughly
with soap and water.
SAVE THESE INSTRUCTIONS
Send Product to:
Master Appliance Corp.
Attn: Repair Department
2420 - 18th Street
Racine, Wl 53403
Operating Instructions
Your Masterflow
®
is a heavy-
duty industrial quality heat
blower. You can do more heat-
ing jobs faster with this heat
blower because of its high
power and air flow ratings.
This product provides a fast
flow of heated air for applica-
tions such as:
• Shrinking heat-shrinkables.
• Shrinking sleeves over
wires, harnesses and bottle
caps.
• Drying inks and paints on
silk screen, posters, fabrics
and papers.
Uses are as limitless as your
own ingenuity.
The proper amount of heat for
each application is dependent
upon the model number of the
Masterflow in use, the dis-
tance from the work surface,
and the heat application time.
Before performing any appli-
cation, we recommend that
4
you experiment with a piece of
scrap material. Use care in
approaching the work until
you find the proper combina-
tion of distance from the work
surface, and the heat applica-
tion time.
Use a gentle back and forth
motion when applying heat
unless it is found that a con-
centrated heat is desired.
Operating Instructions
To Operate Heat Blower
(cont’d)
1) Plug heat blower into prop-
erly rated outlet.
2) Move toggle switch to “Hot”
position. Heat blower will
come up to full operating
temperature in approxi-
mately two minutes.
3) Adjustable stand is pro-
vided to allow nozzle to be
rotated from almost hori-
zontal to vertical position.
4) To turn heat blower off
after use, move switch to
“Cold” position. Run on
cold for approximately
three minutes. This will
allow the heat blower to
cool down and the nozzle
to become cool to the
touch.
5) Move switch to "Off"
position.
When heat blower is used in
an enclosed container, such as
a shrink tunnel or special
enclosure, ambient air must be
allowed to pass into the heat
blower and there must be an
outlet of equal size for the
heated air to pass out of the
enclosure also. Total enclosure
will cause damage or possible
failure to the heat blower due
to the extreme heat generated.
Typical Applications
How to Strip Paint
In addition to many other appli-
cations, stripping paint has
become a popular use for
your Masterflow Heat Blower.
Because of its higher power
and airflow ratings many
professional restoration and
renovation contractors recog-
nize it as the tool of choice for
tough paint stripping jobs.
We recommend using only
the Model AH-501 (120V),
AH-501C (120V, in Canada) or
the Model AH-502 (220/240V)
for professional paint stripping
applications.
Paint Stripping Safety
Instructions
1)
WARNING:
With a heat
gun, as with all other heat
tools, keep a fire extin-
guisher handy and observe
all sensible fire precautions.
1)
We do not recommend
using this heat gun on
hol-
low
surfaces such as out-
door siding, walls, soffits,
panels and partitions, etc.
These areas often contain
flammable materials such
as dust, wood chips, insula-
tion, rodent nests and other
debris which could acciden-
tally ignite.
1)
Your heat gun is best used
for stripping paint from
solid
woodwork with ins and outs,
such as solid interior trim,
mouldings, turnings, doors,
balusters and porch trim, etc.
1)
When stripping paint, always
keep the heat gun moving
in a continuous back and
forth motion. Stopping or
pausing too long in one spot
could ignite the surface you
are working on or the area
behind it.
2) Do not breathe or swallow
lead based paint in any form.
Many old homes and other
buildings contain lead based
paint. Dust, scrapings,
residues and vapors of lead
based paint are extremely
poisonous. Prevent possible
lead poisoning when strip-
ping this type of paint by
using adequate ventilation
(such as a window fan in
5
the exhaust mode), and
keeping a clean work area.
When dust or vapors are
present, use a respirator
designed to filter lead. Move
work outside when possible.
1)
Failure to follow adequate
safety precautions when
working with lead based
paint could result in lead
poisoning. See our Paint
Stripping instructions for
more information.
3) Keep away from chemical
paint strippers which can
ignite or release harmful
vapors.
4) Use adequate ventilation
(such as a window fan in
the exhaust mode) and
keep your work area clean.
5) Wear gloves and safety
glasses at all times.
6) Keep a fully charged fire
extinguisher close at hand.
7) Stay alert, watch what you
are doing, and use common
sense.
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