Graymills BTU Series Installation instructions

Graymills Corporation www.graymills.com
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Operator and Maintenance Manual
BTU BENCHTOP ULTRASONIC CLEANER
Graymills Corporation
2601 S. 25th Ave.
Broadview, IL 60155, U.S.A.
Phone: [phone] • 1-888-472-9645
Email: [e-mail]
www.graymills.com

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Table of Contents
1. Warnings .................................................................................................................... 3
2. Specifications ............................................................................................................. 6
3. Principles of Operation ............................................................................................... 7
4. Description of Components ......................................................................................... 8
5. Preparation of Use (Getting Started)......................................................................... 10
6. Operating Instructions ............................................................................................... 11
7. Accessories............................................................................................................... 13
8. Techniques for Optimizing Cleaning Results............................................................. 14
9. Maintenance.............................................................................................................. 17
10. Troubleshooting....................................................................................................... 18
11. Diagrams and Drawings .......................................................................................... 19
12. Component List ....................................................................................................... 19
13. Warranty.................................................................................................................. 21

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1. Warnings
Warning Symbols
Danger
Indicates an imminently hazardous situation, which, if not
avoided, could result in death or serious injury. This
signal word is to be limited to the most extreme
situations.
Warning
Indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
Caution
Indicates an imminently hazardous situation, which, if not
avoided, could result in minor or moderate injury.
High Voltage
The HIGH VOLTAGE symbol means that failure to follow
this safety statement MIGHT result in personal injury or
death.

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SAFETY PRECAUTIONS
The following safety precautions should be observed when operating this equipment.
WARNING: Utilize this equipment with accordance to the manual and good safety
practices. Failure may result in poor equipment performance, personnel injury or
death, or equipment damage.
WARNING: USE ONLY WATER OR WATER-DETERGENT MIX IN CLEANING
CHAMBER. NEVER USE FLAMMABLE SOLVENTS (FIRE OR EXPLOSION COULD
RESULT) OR CARBON TETRACHLORIDE (PRODUCES TOXIC FUMES).
CAUTION: Never use ultrasonic cleaning console as a sink. Under no
circumstances should waste water be poured into it as the water could overflow the
drain and damage delicate components.
CAUTION: Incorrect voltage can damage the generator. Do not operate the
equipment unless the correct voltage is available.
CAUTION: Never operate unit without at least 6 inches of water in the cleaning
chamber. Failure to observe this precaution could damage the equipment.
WARNING: Do not operate this equipment for other than its intended use. The
system is intended for cleaning components with water and an aqueous, non-
flammable, detergent.
Ground fault circuit protection shall be provided at the time of installation.

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SAFETY PRECAUTIONS (Continued)
WARNING: Hearing protection is required for the user of this equipment.
This equipment is intended to be utilized indoors in an ambient temperature of 50°F
to 95°F.
The benchtop systems are all protected by splashing water and debris to a rating of
IP 23.
This system contains one power cord that is required to be attached to a properly
rated three wire fusible disconnect with a grounding connection capable of handling
twice the rated current. The wires are colored as follows: black - hot / ungrounded,
white - return / grounded, green & yellow - protective earth. The system also contains
one drain valve for tank content drainage. The drain can be plumbed into a facility
drain or remaining unplumbed for added mobility on draining locations.
Recommend the use of NRTL approved electrical plug for use with this system.
Select the appropriate plug for the voltage and current rating of the unit as per the
respective national standard. When the plug is installed, make sure the wires are cut
so that the protective earth is the last to take the strain. Electrical plugs should be
installed only by a certified electrician.

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2. Specifications
BTU0812-A
BTU1114-A
BTU1420-A
Overall Width
16
18
24
Overall Length
18
21
24
Overall Height
15.5
16.5
19.5
Tank Width
12
14
20
Tank Length
8
11
14
Tank Depth
10
11
14
Working Depth
9
10
12
Total Volume of Liquid
(gallons)
4.2 7.3 17
Working Volume of Liquid
(gallons)
3.7 6.7 14.5
System Electrical Supply
Requirements* (Volts) 120 120 120
System Electrical Supply
Requirements* (Amps)
6.8 9.5 18
Generator Electrical Supply
Requirements* (Volts) - - -
Generator Electrical Supply
Requirements* (Amps) - - -
Ultrasonic Power* (Watts)
250
500
750
Frequency of 5300
Series Generator* (kHz) 40 40 40
Heater Power* (Watts)
500
500
1000
Estimated Heat up Time**
1.4 hours
2.5 hours
2.7 hours
Maximum dB Level*
85
85
85
(*) Dependent on selected options
(**) 70°F-140°F change of temperature with stainless steel lid on machine. Heat up times can be
shortened by turning on the ultrasonics at 100% intensity during heat up time.
Other voltages / phases are available: 120V / 1PH, 240V / 1PH
All systems will work with either 50 Hz or 60 Hz.
Fuse Schedule
Fuse
F1
F2
Type
Model
Volts Amps Acting Volts Amps Acting
BTU Benchtop Series
Ultrasonic Fuse
Heater Fuse
BTU0812-A
250
4
Fast
250
6
Fast
BTU1114-A
250
6
Fast
250
6
Fast
BTU1420-A
250
10
Fast
250
10
Fast
* All fuses have the cartridge style form factor

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3. Principles of Operation
The ultrasonic generator transforms AC line power to a specified signal (rated in kHz)
that drives a piezoelectric converter/ transducer. This electrical signal is converted by
the transducer to a mechanical vibration due to the characteristics of the internal
piezoelectric crystals.
The vibrations are transferred from the piezoelectric converters to the high-grade
stainless-steel tank via the transducers bonded directly to the tank. This vibration is
what powers the ultrasonic cleaning process.
The Vibrations cause small vacuum cavities that are formed. These vacuum cavities
grow with each vibration until they reach a critical point where can no longer hold their
size thus collapsing, or imploding, during compression. This continuing rapid process,
called cavitation, is responsible for the scrubbing effect which produces ultrasonic
cleaning.

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4. Description of Components
BTU1114-A
Generator
The cleaning systems are powered by the ultrasonic generator. The generator supplies
the specified signal (25, 40, 68, 132, or 170 kHz) to the transducers. The high efficiency
of the generator ensures the maximum cleaning power delivered to the tank without
excessive power loss due to heat buildup.
Transducers
The transducers are made up of the piezoelectric converter and the Vibra-Bar that is
directly bonded to the stainless steel tank.

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Tank
The tank is made from high grade stainless steel. This is critical because of the
immense stress that the stainless steel is subjected to during the ultrasonic process.
The high grade stainless steel also aids in transferring the ultrasonic signal into the
liquid medium.
Lid
Protects from getting contaminants into the liquid when not in use and insulates the
liquids’ heat when not in use.
Controls
The controls are on the tank itself. The complexity of the controls and their capabilities
depend on the options that have been selected by the customer in each system.

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5. Preparation of Use (Getting Started)
•Carefully unpack the parts of the system. Check the shipping forms to ensure that
you have all the components of the system. If the packaging or the system is
damaged, immediately contact your shipping provider.
•Place the system in a clean dry place free of dust and water spray (Dust and water
that gets into the generator may cause electrical damage to the system). Ensure
maximum airflow to keep the internal components operating at peak performance.
•To safeguard the fuse(s) against failure, always switch the power supply to the off
position before connecting or disconnecting the power cord.
•The power cord(s) supplied by Graymills Corporation must be used. If it does not
match your wall outlet, use a universal adapter that is appropriate to your country. If
your power cord is damaged, contact Graymills Corporation customer service
department for a replacement.
•Fill the tank with liquid (a good rule of thumb is to fill the tank to ¾ full). To protect
against overflow, allow space in the tank for the water displacement of the items that
are to be placed in the tank (DO NOT turn on the system without filling the tank with
liquid). If a pump is present, prime the pump by forcing liquid into the drain.
Continue to prime the pump until the air bubbles stop coming out of the return line.
•Use the chemical in accordance with the manufacturer recommendations. After
cleaning one or two items, you may choose to alter the chemical ration as required,
depending on the condition and quality of the liquid being used and how heavily
soiled the items being cleaned are. Chemicals that are used in this ultrasonic
cleaning system must be compatible with 304 and 316L stainless steel. The
warranty will be immediately void if a chemical attack to the stainless steel occurs.