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651747-2-M
POWER SUPPLY AND INSTALLATION
Do not use neutral as earth ground. A single phase power / earth
ground is required. If this is not available, use a transformer to obtain
single phase power.
Provisions should be made fora quick disconnect or shut-off ofall elec-
trical power to this unit.
All wiring must comply with all local and / or national electrical codes.
• Electrical codes thatapply must be strictly adheredto. Failure to do
so may lead to shock hazard or serious injury.
• Some localelectrical codes mayrequire theinstallation ofrigid con-
duit.
• The installer of this system assumes full responsibility for com-
pliance with these codes.
• Aro is notresponsiblefor accidents resulting fromimproper installa-
tion of components or hardware.
• No electrical power should be in the system at the time the cover is
removed.
AIR AND LUBE REQUIREMENTS
Commonly used solvents and their lowest boiling points as pertains to
the Aro free flow system:
Hydrocarbons (Petroleum Naphthas)
Boiling Point _ F(_ C) k
VM & P 244 (118)
Mineral Spirits 314 (157)
Odorless Mineral Spirits 353 (178)
Aromatics (Terpenes)
Benzene 172 (78)
Toluene 230 (110)
Xylene 281 (138)
Gum Turpentine 311(155)
Dipentene 347 (175)
Alcohols
Methanol 147 (64)
Isobutyl Alcohol 223 (106)
Nybutyl Alcohol 241 (116)
Keytones
MEK 174 (79)
Acetone 122 (50)
Diacetone 284 (140)
k International Critical Tables (ref.)
OPERATING INSTRUCTIONS
START-UP PROCEDURE
1. Fill the system with fluid.
2. Circulate the fluid thru the system.
CAUTION
Powershould never beonwhen thereisonlysol-
vent in the system. Solvents can expand if there is no circula-
tion,causingexcessiveandhazardouspressureinthesystem.
3. Turn the power on.
4. Set the thermostat just below the boiling point of the lowest boiling
solvent in the coating material (see table above).
5. Allow fluid to circulate thru the heater for 5 - 10 minutes.
6. Readjust the thermostat as necessary.
To adjust the temperature, turn the knob:
a. Clockwise -- higher temperature
b. Counterclockwise -- lower temperature
SHUTTING THE SYSTEM OFF
1. Allow the fluidtocirculate for5 -10 minutes aftershutting theheater
off, to cool the system.
2. Always leave the solvent or fluid in the heater.
MAINTENANCE
NOTE: The (26) fluid t rack is a cast assembly and cannot be disas-
sembled for cleaning. Do not allow material to solidify inside the
heater. Flush the paint heater with the proper solvent immediately fol-
lowing each use.
CAUTION
Shut theelectrical supplyoff andrelieve allpres-
surefromthesystembeforeservicinganypartofthefluidheat-
er system.
CLEANING
1. When cleaning the fluid heater, use only solvents compatible with
the material being pumped.
2. The fluid heater shouldbe flushed with solvent when changingme-
dias, or when it is not being used for a period of time.
NOTE: For othermaintenance problems, see“Trouble Shooting”,page
4.
DISASSEMBLY
NOTE: The following procedure is for the repair of the (27) heater car-
tridge assembly or (24) thermostat.
1. Relieve all fluid pressure in the system.
2. Rotatethe(19)adjusting knobcounterclockwisetothe“off”position.
3. Disconnect the power supply to the fluid heater assembly.
4. Disconnect the fluid lines.
5. Remove the six (2) cap screws.
6. Remove the (16) cover.
7. Remove the two (10) machine screws and (11) lockwashers from
the (15) housing, which retain the thermostat assembly.
8. Remove (asoneunit) the(8) terminalblock, (24)thermostat and(9)
mountingplate bycarefullylifting itoutand removingthepower lead
wires (1 and 3) from the first two positions on the (8) terminal block
(refer to figure 3).
9. Removethe(27)heater cartridgeassemblyleadsfromthe(8)termi-
nal block third and fourth positions.
10. Carefully finish removing the assembly by pulling the thermostat
capillary tube out of the (26) fluid track body.
NOTE: Special care must be taken notto sharplybend or kinkthe capil-
lary tube which will ruin the thermostat. Do not use pliers or other tools
which may also damage the tube.
HEATER CARTRIDGE REMOVAL
1. Pull the (27) heater cartridge assembly from the (26) fluid track.
NOTE: If the (27) heater cartridge assembly does not easily come
out, do the following:
a. Remove the (28) pipe plug from thebottom of the (26) fluid
track.
b. Carefully drive the (27) heater cartridge assembly out thru
the top of the heater (toward the cover).
REASSEMBLY
1. Reassembly is done in the reverse order.
NOTE: When reinstalling the (16) cover, be certain the (19) adjusting
knob is turned out.
2. Rotate theadjusting knobclockwise outas faras it will goand turnit
back in carefully to align the slots with the thermostat.