About the Manual Identifying Information on the Cover—The front cover displays
pertinent identifying information for this manual. Most important, are the published manual
number (part number) /ECN (date code). Generally, when a replacement manual is furnished, it
will have the same published manual number, but the latest available ECN. This provides the user
with the latest information applicable to his machine. Similarly all documents comprising the
manual will be the latest available as of the date the manual was printed, even though older ECN
dates for those documents may be listed in the table of contents.
When communicating with the Milnor factory regarding this manual, please also provide the
other identifying information shown on the cover, including the publishing system, access date,
and whether the document ECN’s are the latest available or exact.
Best Available Information—This manual contains the most accurate and complete
information available when Milnor shipped your machine/software. Products are occasionally
released with the best available documentation, even though the device identification (model
numbers, etc.) on the documentation does not explicitly include the delivered model. In such
cases, use the documentation provided.
Although unlikely, incorrect manuals may have been shipped with your machine. If you believe
you received the wrong manuals, or if you need specific information about any aspect of your
machine not addressed in the provided documentation, contact the Milnor Customer Service
group.
References to Yellow Troubleshooting Pages—This manual may contain references
to “yellow pages.” Although the pages containing trouble-shooting procedures are no longer
printed on yellow paper, troubleshooting instructions, if any, will be contained in the easily
located “Troubleshooting” section. See the table of contents.
Trademarks of Pellerin Milnor Corporation—The following terms, some of which
may be used in this publication, are trademarks of Pellerin Milnor Corporation:
Trademarks of Other Companies—The following terms, some of which may be used in
this publication, are trademarks of their respective companies:
Comments and Suggestions
Help us to improve this manual by sending your comments to:
We warrant to the original purchaser that MILNOR machines including electronic
hardware/software (hereafter referred to as “equipment”), will be free from defects in material and
workmanship for a period of one year from the date of shipment (unless the time period is specifically
extended for certain parts pursuant to a specific MILNOR published extended warranty) from our
factory with no operating hour limitation. This warranty is contingent upon the equipment being
installed, operated and serviced as specified in the operating manual supplied with the equipment,
and operated under normal conditions by competentoperators.
Providing we receive written notification of a warranted defect within 30 days of its discovery, we
will at our option repair or replace the defective part or parts, FOB our factory. We retain the right to
require inspection of the parts claimed defective in our factory prior to repairing or replacing same.
We will not be responsible, or in any way liable, for unauthorized repairs or service to our equipment,
and this warranty shall be void if the equipment is tampered with, modified, or abused, used for
purposes not intended in the design and construction of the machine, or is repaired or altered in any
way without MILNOR's written consent.
Parts damaged by exposure to weather, to aggressive water, or to chemical attack are not covered by
this warranty. For parts which require routine replacement due to normal wear such as gaskets,
contact points, brake and clutch linings, belts, hoses, and similar parts the warranty time period is 90
days.
We reserve the right to make changes in the design and/or construction of our equipment (including
purchased components) without obligation to change anyequipmentpreviouslysupplied.
ANY SALE OR FURNISHING OF ANY EQUIPMENT BY MILNOR IS MADE ONLY UPON
THE EXPRESS UNDERSTANDING THAT MILNOR MAKES NO EXPRESSED OR IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR USE OR
PURPOSE
LIMITED TO REDHIBITION
DAMAGES ACTUALLY INCURRED OR REQUIRED AS A RESULT OF: THE FAILURE OF
ANY OTHER PERSON OR ENTITY TO PERFORM ITS RESPONSIBILITIES, FIRE OR
OTHER HAZARD, ACCIDENT, IMPROPER STORAGE, MIS-USE, NEGLECT, POWER OR
ENVIRONMENTAL CONTROL MALFUNCTIONS, DAMAGE FROM LIQUIDS, OR ANY
OTHER CAUSE BEYOND THE NORMAL RANGE OF USE.REGARDLESS OF HOW
CAUSED, IN NO EVENT SHALL MILNOR BE LIABLE FOR SPECIAL, INDIRECT,
PUNITIVE, LIQUIDATED, OR CONSEQUENTIAL COSTS OR DAMAGES, OR ANY COSTS
OR DAMAGES WHATSOEVER WHICH EXCEED THE PRICE PAID TO MILNOR FOR THE
EQUIPMENT ITSELLSORFURNISHES.
THE PROVISIONS ON THIS PAGE REPRESENT THE ONLY WARRANTY FROM MILNOR
AND NO OTHER WARRANTY OR CONDITIONS, STATUTORY OR OTHERWISE, SHALL
BE IMPLIED.
OR ANY OTHER WARRANTY IMPLIED BY LAW INCLUDING BUT NOT
. MILNOR WILL NOT BE RESPONSIBLE FOR ANY COSTS OR
WE NEITHER ASSUME, NOR AUTHORIZE ANY EMPLOYEE OR OTHER PERSON TO
ASSUME FOR US, ANY OTHER RESPONSIBILITY AND/OR LIABILITY IN CONNECTION
WITH THE SALE OR FURNISHING OF OUR EQUIPMENT TOANYBUYER.
You can get components to repair your machine from the approved supplier where you got this
machine. Your supplier will usually have the necessary components in stock. You can also get
®
components from the Milnor
factory.
Tell the supplier the machine model and serial number and this data for each necessary component:
• The component number from this manual
• The component name if known
• The necessary quantity
• The necessary transportation requirements
• If the component is an electrical component, give the schematic number if known.
• If the component is a motor or an electrical control, give the nameplate data from the used
component.
To write to the Milnor factory:
Pellerin Milnor Corporation
Post Office Box 400
Kenner, LA 70063-0400
UNITED STATES
BIUUUS27 (Published) Book specs- Dates: 20051111 / 20051111 / 20060323 Lang: ENG01 Applic: IFN HON MXU
3
Safety—Suspended, Open Pocket, Non-tilting WasherExtractors
1. General Safety Requirements—Vital Information for
Management Personnel
Incorrect installation, neglected preventive maintenance, abuse, and/or improper repairs, or
changes to the machine can cause unsafe operation and personal injuries, such as multiple
fractures, amputations, or death. The owner or his selected representative (owner/user) is
responsible for understanding and ensuring the proper operation and maintenance of the machine.
The owner/user must familiarize himself with the contents of all machine instruction manuals.
The owner/user should direct any questions about these instructions to a Milnor® dealer or the
Milnor® Service department.
Most regulatory authorities (including OSHA in the USA and CE in Europe) hold the owner/user
ultimately responsible for maintaining a safe working environment. Therefore, the owner/user
must do or ensure the following:
• recognize all foreseeable safety hazards within his facility and take actions to protect his
personnel, equipment, and facility;
• work equipment is suitable, properly adapted, can be used without risks to health or safety,
and is adequately maintained;
• where specific hazards are likely to be involved, access to the equipment is restricted to those
employees given the task of using it;
• only specifically designated workers carry out repairs, modifications, maintenance, or
servicing;
• information, instruction, and training is provided;
• workers and/or their representatives are consulted.
[Document BIUUUS04]
Work equipment must comply with the requirements listed below. The owner/user must verify
that installation and maintenance of equipment is performed in such a way as to support these
requirements:
• control devices must be visible, identifiable, and marked; be located outside dangerous zones;
and not give rise to a hazard due to unintentional operation;
• control systems must be safe and breakdown/damage must not result in danger;
• work equipment is to be stabilized;
• protection against rupture or disintegration of work equipment;
• guarding, to prevent access to danger zones or to stop movements of dangerous parts before
the danger zones are reached. Guards to be robust; not give rise to any additional hazards; not
be easily removed or rendered inoperative; situated at a sufficient distance from the danger
zone; not restrict view of operating cycle; allow fitting, replacing, or maintenance by
restricting access to relevant area and without removal of guard/protection device;
• suitable lighting for working and maintenance areas;
• maintenance to be possible when work equipment is shut down. If not possible, then
protection measures to be carried out outside danger zones;
• work equipment must be appropriate for preventing the risk of fire or overheating; discharges
of gas, dust, liquid, vapor, other substances; explosion of the equipment or substances in it.
PELLERIN MILNOR CORPORATION
Safety—Suspended, Open Pocket, Non-tilting Washer-Extractors
y
y
r
r
4
1.1. Laundr
Facilit
—Provide a supporting floor that is strong and rigid enough to support–with
a reasonable safety factor and without undue or objectionable deflection–the weight of the fully
loaded machine and the forces transmitted by it during operation. Provide sufficient clearance fo
machine movement. Provide any safety guards, fences, restraints, devices, and verbal and/or
posted restrictions necessary to prevent personnel, machines, or other moving machinery from
accessing the machine or its path. Provide adequate ventilation to carry away heat and vapors.
Ensure service connections to installed machines meet local and national safety standards,
especially regarding the electrical disconnect (see the National Electric Code). Prominently post
safety information, including signs showing the source of electrical disconnect.
1.2. Personnel—Inform personnel about hazard avoidance and the importance of care and
common sense. Provide personnel with the safety and operating instructions that apply to them.
Verify that personnel use proper safety and operating procedures. Verify that personnel
understand and abide by the warnings on the machine and precautions in the instruction manuals.
1.3. Safety Devices—Ensure that no one eliminates or disables any safety device on the machine
or in the facility. Do not allow machine to be used with any missing guard, cover, panel or door.
Service any failing or malfunctioning device before operating the machine.
1.4. Hazard Information—Important information on hazards is provided on the machine safety
placards, in the Safety Guide, and throughout the other machine manuals. Placards must be kept
clean so that the information is not obscured. They must be replaced immediately if lost or
damaged. The Safety Guide and other machine manuals must be available at all times to
the appropriate personnel. See the machine service manual for safety placard part numbers.
Contact the Milnor Parts department for replacement placards or manuals.
1.5. Maintenance—Ensure the machine is inspected and serviced in accordance with the norms of
good practice and with the preventive maintenance schedule. Replace belts, pulleys, brake
shoes/disks, clutch plates/tires, rollers, seals, alignment guides, etc. before they are severely
worn. Immediately investigate any evidence of impending failure and make needed repairs (e.g.,
cylinder, shell, or frame cracks; drive components such as motors, gear boxes, bearings, etc.,
whining, grinding, smoking, or becoming abnormally hot; bending or cracking of cylinder, shell,
frame, etc.; leaking seals, hoses, valves, etc.) Do not permit service or maintenance by
unqualified personnel.
2. Safety Alert Messages—Internal Electrical and Mechanical
Hazards
[Document BIUUUS11]
The following are instructions about hazards inside the machine and in electrical enclosures.
WARNING 1 : Electrocution and Electrical Burn Hazards—Contact with electric powe
can kill or seriously injure you. Electric power is present inside the cabinetry unless the main
machine power disconnect is off.
• Do not unlock or open electric box doors.
• Do not remove guards, covers, or panels.
• Do not reach into the machine housing or frame.
• Keep yourself and others off of machine.
• Know the location of the main machine disconnect and use it in an emergency to remove
all electric power from the machine.
PELLERIN MILNOR CORPORATION
WARNING 2 : Entangle and Crush Hazards—Contact with moving components normally
5
isolated by guards, covers, and panels, can entangle and crush your limbs. These components
move automatically.
• Do not remove guards, covers, or panels.
• Do not reach into the machine housing or frame.
• Keep yourself and others off of machine.
• Know the location of all emergency stop switches, pull cords, and/or kick plates and use
The following are instructions about hazards around the front, sides, rear or top of the machine.
WARNING 3 : Crush Hazards—Suspended machines only—Spaces between the shell and
housing can close and crush or pinch your limbs. The shell moves within the housing during
operation.
• Do not reach into the machine housing or frame.
• Keep yourself and others clear of movement areas and paths.
4. Safety Alert Messages—Cylinder and Processing Hazards
[Document BIUUUS13]
The following are instructions about hazards related to the cylinder and laundering process.
DANGER 4 : Entangle and Sever Hazards—Contact with goods being processed can
cause the goods to wrap around your body or limbs and dismember you. The goods are normally
isolated by the locked cylinder door.
• Do not attempt to open the door or reach into the cylinder until the cylinder is stopped.
• Do not touch goods inside or hanging partially outside the turning cylinder.
• Do not operate the machine with a malfunctioning door interlock.
• Open pocket machines only—Do not jog the cylinder and pull the goods at the same time.
• Open pocket machines only—Keep yourself and others clear of cylinder and goods during
jogging operation.
• Do not operate the machine with malfunctioning two-hand manual controls.
• Know the location of all emergency stop switches, pull cords, and/or kick plates and use
them in an emergency to stop machine motion.
• Know the location of the main machine disconnect and use it in an emergency to remove
all electric power from the machine.
WARNING 5 : Crush Hazards—Contact with the turning cylinder can crush your limbs. The
cylinder will repel any object you try to stop it with, possibly causing the object to strike or stab
you. The turning cylinder is normally isolated by the locked cylinder door.
• Do not attempt to open the door or reach into the cylinder until the cylinder is stopped.
• Do not place any object in the turning cylinder.
• Do not operate the machine with a malfunctioning door interlock.
• Open pocket machines only—Keep yourself and others clear of cylinder and goods during
jogging operation.
PELLERIN MILNOR CORPORATION
Safety—Suspended, Open Pocket, Non-tilting Washer-Extractors
6
• Do not operate the machine with malfunctioning two-hand manual controls.
WARNING 6 : Confined Space Hazards—Confinement in the cylinder can kill or injure
you. Hazards include but are not limited to panic, burns, poisoning, suffocation, heat prostration,
biological contamination, electrocution, and crushing.
• Do not attempt unauthorized servicing, repairs, or modification.
WARNING 7 : Explosion and Fire Hazards—Flammable substances can explode or ignite
in the cylinder, drain trough, or sewer. The machine is designed for washing with water, not any
other solvent. Processing can cause solvent-containing goods to give off flammable vapors.
• Do not use flammable solvents in processing.
• Do not process goods containing flammable substances. Consult with your local fire
department/public safety office and all insurance providers.
5.1.1. Hazards Resulting from Inoperative Safety Devices
DANGER 8 : Entangle and Sever Hazards—Cylinder door interlock—Operating the
machine with a malfunctioning door interlock can permit opening the door when the cylinder is
turning and/or starting the cycle with the door open, exposing the turning cylinder.
• Do not operate the machine with any evidence of damage or malfunction.
WARNING 9 : Multiple Hazards—Operating the machine with an inoperative safety device
can kill or injure personnel, damage or destroy the machine, damage property, and/or void the
warranty.
• Do not tamper with or disable any safety device or operate the machine with a
WARNING 10 : Electrocution and Electrical Burn Hazards—Electric box doors—
Operating the machine with any electric box door unlocked can expose high voltage conductors
inside the box.
• Do not unlock or open electric box doors.
WARNING 11 : Entangle and Crush Hazards—Guards, covers, and panels—Operating
the machine with any guard, cover, or panel removed exposes moving components.
• Do not remove guards, covers, or panels.
5.1.2. Hazards Resulting from Damaged Mechanical Devices
WARNING 12 : Multiple Hazards—Operating a damaged machine can kill or injure
personnel, further damage or destroy the machine, damage property, and/or void the warranty.
• Do not operate a damaged or malfunctioning machine. Request authorized service.
WARNING 13 : Explosion Hazards—Cylinder—A damaged cylinder can rip apart during
extraction, puncturing the shell and discharging metal fragments at high speed.
• Do not operate the machine with any evidence of damage or malfunction.
PELLERIN MILNOR CORPORATION
WARNING 14 : Explosion Hazards—Clutch and speed switch (multiple motor
(
7
machines)—A damaged clutch or speed switch can permit the low speed motor to engage during
extract. This will over-speed the motor and pulleys and can cause them to rip apart, discharging
metal fragments at high speed.
• Stop the machine immediately if any of these conditions occur: • abnormal whining sound
during extract • skidding sound as extract ends • clutches remain engaged or re-engage
during extract
5.2. Careless Use Hazards
5.2.1. Careless Operation Hazards—Vital Information for Operator Personnel
see also
operator hazards throughout manual)
WARNING 15 : Multiple Hazards—Careless operator actions can kill or injure personnel,
damage or destroy the machine, damage property, and/or void the warranty.
• Do not tamper with or disable any safety device or operate the machine with a
• Do not operate a damaged or malfunctioning machine. Request authorized service.
• Do not attempt unauthorized servicing, repairs, or modification.
• Do not use the machine in any manner contrary to the factory instructions.
• Use the machine only for its customary and intended purpose.
• Understand the consequences of operating manually.
5.2.2. Careless Servicing Hazards—Vital Information for Service Personnel (see also
service hazards throughout manuals)
WARNING 16 : Electrocution and Electrical Burn Hazards—Contact with electric
power can kill or seriously injure you. Electric power is present inside the cabinetry unless the
main machine power disconnect is off.
• Do not service the machine unless qualified and authorized. You must clearly understand
the hazards and how to avoid them.
• Abide by the current OSHA lockout/tagout standard when lockout/tagout is called for in
the service instructions. Outside the USA, abide by the OSHA standard in the absence of
any other overriding standard.
WARNING 17 : Entangle and Crush Hazards—Contact with moving components
normally isolated by guards, covers, and panels, can entangle and crush your limbs. These
components move automatically.
• Do not service the machine unless qualified and authorized. You must clearly understand
the hazards and how to avoid them.
• Abide by the current OSHA lockout/tagout standard when lockout/tagout is called for in
the service instructions. Outside the USA, abide by the OSHA standard in the absence of
any other overriding standard.
WARNING 18 : Confined Space Hazards—Confinement in the cylinder can kill or injure
you. Hazards include but are not limited to panic, burns, poisoning, suffocation, heat prostration,
biological contamination, electrocution, and crushing.
• Do not enter the cylinder until it has been thoroughly purged, flushed, drained, cooled,
and immobilized.
PELLERIN MILNOR CORPORATION
Safety—Suspended, Open Pocket, Non-tilting Washer-Extractors
About the Forces Transmitted by Milnor® Washer-extractors
During washing and extracting, all washer-extractors transmit both static and dynamic (cyclic)
forces to the floor, foundation, or any other supporting structure. During washing, the impact of
the goods as they drop imparts forces which are quite difficult to quantify. Size for size, both
rigid and flexibly-mounted machines transmit approximately the same forces during washing.
During extracting, rigid machines transmit forces up to 30 times greater than equivalent flexiblymounted models. The actual magnitude of these forces vary according to several factors:
• machine size,
• final extraction speed,
• amount, condition, and type of goods being processed,
• the liquor level and chemical conditions in the bath preceding extraction, and
• other miscellaneous factors.
Estimates of the maximum force normally encountered are available for each Milnor® model and
size upon request. Floor or foundation sizes shown on any Milnor® document are only for ongrade situations based only on previous experience without implying any warranty, obligation, or
responsibility on our part.
1.
Rigid Machines
Size for size, rigid washer-extractors naturally require a stronger, more rigid floor, foundation, or
other supporting structure than flexibly-mounted models. If the supporting soil under the slab is
itself strong and rigid enough and has not subsided to leave the floor slab suspended without
support, on grade installations can often be made directly to an existing floor slab if it has enough
strength and rigidity to safely withstand our published forces without transmitting undue
vibration. If the subsoil has subsided, or if the floor slab itself has insufficient strength and
rigidity, a deeper foundation, poured as to become monolithic with the floor slab, may be
required. Support pilings may even be required if the subsoil itself is “springy” (i.e., if its
resonant frequency is near the operating speed of the machine). Above-grade installations of rigid
machines also require a sufficiently strong and rigid floor or other supporting structure as
described below.
2.
Flexibly-mounted Machines
Size for size, flexibly-mounted machines generally do not require as strong a floor, foundation, or
other supporting structure as do rigid machines. However, a floor or other supporting structure
having sufficient strength and rigidity, as described in Section 3, is nonetheless vitally important
for these models as well.
3.
How Strong and Rigid?
Many building codes in the U.S.A. specify that laundry floors must have a minimum live load
capacity of 150 pounds per square foot (732 kilograms per square meter). However, even
compliance with this or any other standard does not necessarily guarantee sufficient rigidity. In
any event, it is the sole responsibility of the owner/user to assure that the floor and/or any other
supporting structure exceeds not only all applicable building codes, but also that the floor and/or
any other supporting structure for each washer-extractor or group of washer-extractors actually
has sufficient strength and rigidity, plus a reasonable factor of safety for both, to support the
weight of all the fully loaded machine(s) including the weight of the water and goods, and
including the published 360º rotating sinusoidal RMS forces that are transmitted by the
machine(s). Moreover, the floor, foundation, or other supporting structure must have sufficient
PELLERIN MILNOR CORPORATION
About the Forces Transmitted by Milnor® Washer-extractors
10
rigidity (i.e., a natural or resonant frequency many times greater than the machine speed with a
reasonable factor of safety); otherwise, the mentioned 360º rotating sinusoidal RMS forces can be
multiplied and magnified many times. It is especially important to consider all potential vibration
problems that might occur due to all possible combinations of forcing frequencies (rotating
speeds) of the machine(s) compared to the natural frequencies of the floor and/or any other
supporting structure(s). A qualified soil and/or structural engineer must be engaged for this
purpose.
Figure 1: How Rotating Forces Act on the Foundation
Typical Machine
Legend
A. Direction of force
B. Load
C. Rotation (Frequency = RPM / 60)
.
Figure 1 above is intended to depict both on-grade and above-grade installations and is equally
applicable to flexibly-mounted washer-extractors, as well as to rigid models installed either
directly on a floor slab or on a foundation poured integrally with the slab. Current machine data is
available from Milnor® upon request. All data is subject to change without notice and may have
changed since last printed. It is the sole responsibility of every potential owner to obtain written
confirmation that any data furnished by Milnor® applies for the model(s) and serial number(s) of
the specific machines.
Several installation guidelines and precautions are displayed symbolically, on tags placed at the
appropriate locations on the machine. Some are tie-on and others are adhesive tags. Tie-on tags
and white, adhesive tags may be removed after installation. Yellow adhesive tags must remain on
the machine.
PELLERIN MILNOR CORPORATION
Understanding the Tag Guidelines for the Models Listed Below
12
Most tags contain only symbols (no words). A few are worded. The explanations below, start
with the tag part number (displayed on the tag). If a tag contains no words, the meaning of the tag
is explained below. If the tag contains words, the explanation below simply repeats the wording.
Display or Action Explanation
Read the manual before proceeding. This symbol appears on
most tags. The machine ships with a complete set of manuals.
The safety, installation, and electrical schematic manuals are
particularly important to installers.
B2TAG88005: This carefully built product was tested and
inspected to meet Milnor performance and quality standards by
B2TAG94078: Do not forklift here; do not jack here; do not step
here—whichever applies.
B2TAG94079: Rig for crane lifting (either 3-point or 4-point,
depending on the number of lifting eyes provided) using a steep
angle on the chains (closer to vertical than horizontal).
B2TAG94081: Motor must rotate in this direction. This tag is
usually wrapped around a motor housing. If the motor turns in
the opposite direction when the machine is first tested, the
electrical hookup is incorrect and must be reversed as explained
in the schematic manual.
B2TAG94084: Do not lift from one corner of the machine, as
this can cause the frame to rack, damaging it.
PELLERIN MILNOR CORPORATION
B2TAG94097: The cylinder must rotate counterclockwise
during draining and extraction (spin) when viewed from here
(rear of machine). Otherwise, reverse the electric power
connections, as explained in the schematic manual.
B2TAG94099: Do not strike the shell door when fork-lifting.
This can cause the door to leak.
Otherwise, you may twist components, such as valves, damaging
13
Display or Action Explanation
B2T2001013: Hot water connection.
B2T2001014: Cold water connection.
B2T2001015: Reuse (third) water connection (optional).
B2T2001016: Flushing water connection. This is the water that
goes into the supply compartment or pumped chemical manifold
to flush chemicals into the machine (optional).
B2T2001028: Look for tags inside the machine. These tags may
identify shipping restraints to be removed or components to be
installed. Do not start the machine until these actions are
completed.
B2T2002013: Do not start the machine until shipping restraints
are removed. This tag will appear on the outside of the machine
to alert you to the presence of internal shipping restraints. A tag
will also appear on the restraint to help identify it. Most, but not
all shipping restraints display the color red. Some shipping
restraints are also safety stands. Do not discard these.
B2T2003001: Hold the side of the connection stationary with a
wrench as you tighten the connection with another wrench.
them.
PELLERIN MILNOR CORPORATION
Understanding the Tag Guidelines for the Models Listed Below
Ensure the chemical system prevents dribbling, siphoning, or any
14
Display or Action Explanation
B2T2003002: CAUTION: Equipment and Textile Damage
Hazards—Chemicals leaked into the machine, particularly when
it is idle, can destroy machine components and textiles left in the
machine.
other unintentional release of chemicals.
Inspect regularly for proper operation and evidence of damage.
Consult Milnor document BIWUUI03 “Avoiding Damage from
Allied Remote Chemical Delivery Systems”.
Avoiding Damage From Allied Remote Chemical Delivery
Systems
Milnor® does not manufacture or supply remote chemical delivery systems and this document is
meant only to illustrate some of the possible problems that can be minimized during installation
of such systems by the chemical supply company. Milnor washer-extractors and CBW
washers (tunnels) are available with convenient inlets for such systems (see Figure 1). Most
common of the types of systems currently used in commercial laundering operations are pumped
chemical systems. Other types, such as constant pressure, re-circulating ring main systems have
also been, and may continue to be used with Milnor equipment.
This document warns about some of the possible hazards posed by chemical systems and lists
certain requirements needed to minimize those hazards. The procedures for interfacing with allied
chemical systems and information pertinent to chemical use in general are provided elsewhere in
the product manuals (see Note 1).
Figure 1: Pumped Chemical Inlets on CBW Batch Washer
®
batch
Note 1:
permitting acid sours to react with hypo chlorite) due to incorrect formulation can also be hazardous.
Information pertinent to chemical u se is provided elsewhere in the product manuals.
1.
How a Chemical System Can Damage the Machine It Serves
Misuse of laundering chemicals (such as injecting excessive concentrations of chl orine bleach or
Milnor has manufactured washer-extractors and tunnel washers with the same stainless steel
specification since its founding. Every batch of steel used is certified and documented by the steel
mill. Testing of samples damaged by corrosion have, in every case, proven the steel to be well
within the AISI 304 specification.
PELLERIN MILNOR CORPORATION
Avoiding Damage From Allied Remote Chemical Delivery Systems
16
Chemical products commonly found in the laundry industry, when used in established dosages
and proper operating parameters, under the auspices of an experienced chemical specialist, should
produce satisfactory results, with no consequential detrimental effects. The industry has published
standards in Riggs and Sherrill, “Textile Laundering Technology”. However, the stainless steel
can be damaged and even destroyed by abnormal contact with chlorine bleach, hydrofluosilicic
acid and other commonly used chemicals, as will occur if chemicals are unintentionally leaked
into the machine, particularly when it is no longer in use and especially when machine surfaces
are dry.
Some chemical systems have been found to permit chemicals to dribble from the supply lines, or
worse, to siphon from the supply tank into the machine, during operation and long after the
system is shut down—as after working hours and during weekends. If this occurs, deterioration
(rusting) of the stainless steel and damage to any textiles therein will inevitably result. If this
condition goes undetected, machine damage is likely to be catastrophic. No machine is
immune to such damage.
CAUTION 1 : Equipment and Textile Damage Hazards
—Chemicals leaked into the
machine, particularly when it is idle can destroy machine components and textiles left in the
machine. Pellerin Milnor Corporation accepts absolutely no responsibility for damage to its
equipment or to textiles therein from abnormal contact with chemicals.
• Ensure that the chemical system prevents unintenti ona l rele ase of chemicals.
• Inspect regularly for proper operation and evidence of damage.
2.
Requirements for Chemical Systems Used With Milnor Machines
It is the responsibility of the chemical system manufacturer and supplier to ensure that their
system is safe for personnel and equipment. Some important points are described below.
2.1.
Ensure the System Cannot Siphon.
—The supply system must be designed to
counteract any siphoning that could occur as a result of having a sealed supply line between the
bottom of the chemical tank and the internal machine connection at the drain trough. As shown in
the Figure 2 examples, if the pump (P) and/or the valving does not provide positive closure and
there is no vacuum breaker protection, siphoning is likely to occur. In each of the Figure 2
illustrations, the volume of chem ical in the tank above th e siphon level (S), and indi ca ted by
shading, will flow into the machine.
PELLERIN MILNOR CORPORATION
Figure 2:
17
Siphoning From the Chemical Tank into the Machine
Examples
Legend
Pump
P.
Siphon level. Shading indicates the chemical delivery line and tank content that can siphon into
S.
the machine.
Chemical tank
T.
2.2.
Ensure the Chemical Lines Cannot Dribble
—The pumped chemical system may
provide a means of positively closing the chemical line at the pump location, but not at the
injection site. Hence, any concentrated chemical that remains in the injection line between the
pump and the machine is free to flow into the machine. Some examples of this are shown in
Figure 3.
PELLERIN MILNOR CORPORATION
Avoiding Damage From Allied Remote Chemical Delivery Systems
18
Figure 3:
Dribbling From Chemical Supply Line Into Machine
(assumes positive closure at the pump)
Examples
Legend
Portion of supply line, the contents of which can dribble into the machine
D.
Pump
P.
Chemical tank
T.
3.
Design and Installation Recommendations
It is the responsibility of the chemical system manufacturer and supplier to use whatever
measures are necessary to ensure that their system is safe for personnel and equipment. The
following are some of the possible methods the manufacturer or supplier may wish to use, as
appropriate.
3.1.
Siphoning: Positively close the line.
—If the pump does not provide positive closure
when the system is off, employ a shutoff valve in the line to serve this purpose.
3.2.
Siphoning: Break the siphon.
—Provide an air gap or vacuum breaker in the chemical
delivery line. This must be located above the “full” line of the tank.
3.3.
Dribbling: Flush the entire chemical delivery line.
—If any concentrated chemical
that remains in the injection line between the pump and the machine is free to flow into the
machine, employ a system that flushes the entire line between the pump and the injection point
with fresh water after each injection.
PELLERIN MILNOR CORPORATION
3.4.
19 20
Dribbling: Locate the entire chemical line below the machine inlet.
—
Assuming the chemical system does not retain any line pressure and that the pump provides
positive closure when the system is off, locate the entire chemical delivery line below the level of
the chemical inlet. An example of this is shown in Figure 4.
Figure 4:
Locating a Pumped Chemical System With Positive
Closure To Protect Against Machine Damage
Example of Correct PlacementLegend
Chemical inlet on
I.
machine
Chemical delivery line
L.
Pump with positive
P.
closure when system is
off
Chemical tank
T.
4.
Guarding Against Leaks
All personnel who may work with the chemical system (e.g., chemical system manufacturer,
chemical system supplier, chemical supplier, operator, maintenance personnel) should be vigilant
in observing for leaks in the system. When connecting, or reconnecting chemical lines, whether at
installation, after taking samples, or when replacing components, at a minimum ensure that:
1. the proper components are used,
2. all connections are the proper fit, and
3. all components are securely connected.
CAUTION 2 : Injury and Damage Hazards
—Chemicals leaking from a chemical system
may be corrosive or toxic. Such chemicals can injure personnel and damage equipment.
Once the machine is given to the carrier for delivery, it is solely the responsibility of the carrier to
ensure that no damage occurs during transit. In addition to readily apparent damage, carriers are
liable for concealed damage. Do not hesitate to file a claim with the carrier if the machine is
damaged in any way during shipment. Milnor will be glad to assist you in filing your claim, but is
not responsible for any shipping damage to the machine once it has been delivered to the carrier
in good condition.
Remove the protective coverings (leaving the machine on shipping skids) and examine carefully
for possible shipping damage. If the machine is damaged, notify the transportation company
immediately.
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1. Use skids for fork lifting. If possible, leave the machine on shipping skids until it is near its
final position. Once skids are removed, carefully place forks under base. Do not allow the
forks to come in contact with valves, piping, motors, etc., located under the machine. Do not
push or hit the shell front when uncrating or installing the machine as it may cause the door to
leak.
2. Never push, pull, lift, jack, or exert pressure on any components that protrude from the
machine frame (shell front, door, electric boxes, controls, guards, conduits, conveyors,
piping, valves, drains, vents, tilt frames, etc.).
3. Do not pull on door conduit to help move the machine as the door switch may require
readjustment.
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1. All openings and corridors through which equipment must pass during installation must be
large enough to accommodate the width and the height of the machine as shown on the
dimensional drawings. It is occasionally possible to reduce the overall dimensions by
removing piping or other special modifications. Consult Milnor for additional information.
2. Sufficient clearance must be provided for normal operation and maintenance procedures.
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1. Allow sufficient ventilation for the heat and vapors of normal operation to dissipate.
2. Provide easy access to controls. Operators must be able to view all status lights and reach all
controls associated with the machine (e.g., electrical power connections, water and steam
shutoffs, etc.)
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—The floor and/or all other support components mu st hav e
sufficient strength and rigidity with due consideration for the natural or resonant frequency
thereof to withstand the fully loaded weight of the machine, including the wet goods and any
repeated sinusoidal (rotating) forces generated during its operation. Determining the suitability of
floors, foundations, and other supporting structures normally requires analysis by a qualified
structural engineer.
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23
Figure 1: Vibration warning
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—Improperly installed suspension type machines
can “walk” out of position during extract, endangering personnel and damaging equipment.
• Roughen floor. Install anchor bolts and grout under all base pads to prevent “teeter-totter”
and sideways movement.
• Remove shipping restraints after machine is in place. Failure to remove all restraints
(usually painted red) will cause malfunctions and damage. Restraints may be located
behind access covers. These include, but are not limited to:
• Cylinder hold-down bolts, brackets, straps and/or blocking. Replace all fasteners which
are part of the machine structure.
• Vibration safety switch restraint
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To protect against lateral creeping of the machine during operation (due to vibration), roughen the
area of the floor where the grout will be applied. Anchor bolts are required.
1. With the machine near the final location, unbolt the shipping skids. Observing all
precautions, lift the machine off its skids and lower the machine onto blocking. Shim the
blocking until the machine is level and approximately l" (25) clearance exists under each base
pad. Install anchor bolts as shown on the dimensional drawing, but do not tighten bolts until
grout is completely dry.
2. Apply grout between the existing foundation floor and the base pads, observing the following
considerations:
• Use only industrial strength non-shrinking grout. Pack or trowel by hand.
• If the grout after mixing is too thin (causing it to flow from under the base pads) install
temporary cardboard framing around pads to retain the grout until it cures.
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—Voids under the base pads can
magnify vibration and cause unsatisfactory operation.
• Grout must displace total clearance between base pads and existing foundation floor.
• Voids must not exist.
3. Tighten anchor bolts evenly using only one-quarter turn on each bolt before moving to the
next one. While tightening, frequently skip from front to back and right to left to insure
uniform tension. After tightening all bolts, check each bolt at least twice during the first week
of operation.
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—Machine can be damaged if shipping restraints
are improperly utilized. These include various bolts, brackets, weldments and safety stands
(painted red), and the vibration safety switch (tie wrapped).
• DO NOT remove shipping restraints until installation is complete
• DO remove all shipping restraints before operating machine.
Prior to operation,
• Remove the red locking bolts from the front and back of the shell.
• Remove the red shipping bracket stands.
• Remove the tie wrap that secures the vibration safety switch.
• Check the perforated cylinder for smoothness before placing machine in service. Milnor
cannot accept cylinder finish damage claims after machine is in service.