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Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product
described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in
personal injury and/or property damage! Retain instructions for future reference.
Claw Medical Vacuum Systems
Description
GENERAL
Powerex Medical Vacuum Systems are designed to provide
vacuum for hospitals and medical institutes. They are
designed and constructed to meet NFPA 99 requirements
for Level 1 piped vacuum systems. If WAGD vacuum is the
same as the medical-surgical vacuum source: Flammable
anesthetics or flammable vapors shall be diluted below the
flammable limit prior to disposal into the vacuum system
or the pumps shall be designed of materials and using
lubricants that are inert in the presence of oxygen, nitrous
oxide, and halogenated anesthetics.
Safety Guidelines
This manual contains information that is very important
to know and understand. This information is provided for
SAFETY and to PREVENT EQUIPMENT PROBLEMS. To help
recognize this information, observe the following symbols.
Danger indicates an imminently
hazardous situation which, if
not avoided, WILL result in death or serious injury.
Warning indicates a potentially
hazardous situation which, if
not avoided, COULD result in death or serious injury.
Caution indicates a potentially
hazardous situation which, if
not avoided, MAY result in minor or moderate injury.
Notice indicates important
information, that if not
followed, may cause damage to equipment.
Unpacking
Immediately upon receipt of the vacuum system, inspect
for any damage which may have occurred during shipment.
Repair or replace damaged items before use. The name-plate
should be checked to verify the correct model and voltage.
Do not operate unit if damaged
during shipping, handling or
use. Damage may result in unsafe conditions and cause injury
or property damage.
Specifications
Product CVTD, CVPD, CVPT, CVPQ Series
Operating
Voltages
Control Panel UL508A and NFPA compliant
Motor TEFC Electric Motor
Tank ASME Rated for 200 psi MAWP
Pump Capable of operating at:
Drive Direct
Tank Sizes 80 Gallon to 240 Gallon
Performance See Cut Sheet
Outlet Air
Connections
208V, 230V, 460V
28.4” Hg (sea level) continuous duty for 2 HP
28.4” Hg (sea level) continuous duty for 3 HP
28.4” Hg (sea level) continuous duty for 5 HP
28.4” Hg (sea level) continuous duty for 6.4 HP
27.0” Hg (sea level) continuous duty for 7 HP
27.0” Hg (sea level) continuous duty for 9.1 HP
25.5” Hg (sea level) continuous duty for 10.2 HP
23.4” Hg (sea level) continuous duty for 15 HP
2 HP - 1 inch
3 HP - 1 inch
5 HP - 1 inch
6.4 HP - 1 inch
7 HP - 1 inch
9.1 HP - 1 inch
10.2 HP - 1-1/2 inch
15 HP - 3 inch
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
1-888-769-7979 • www.powerexinc.com
IN561501AV 5/12
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Claw Medical Vacuum Systems
Components
VACUUM PUMPS
Powerex medical vacuum systems use electric motor driven
claw type pumps to create vacuum for the removal of
unwanted fluids and gases. The pumps remove the gases and
exhaust them to atmosphere through the exhaust piping
system.
Systems consist of multiple vacuum pumps that are
automatically controlled and may be isolated using valves
for service. One pump is used as the reserve. The control
system will trigger alarm actions in accordance with NFPA 99
requirements if the capacity of the reserve pump is needed.
The control system operates the available pumps in response
to vacuum demand as determined by the vacuum switches or
sensor. If needed, the controls will include minimum run timer
functions to prevent frequent starting and stopping of the
electric motors.
The vacuum pump assemblies are mounted with vibration
isolation Each vacuum pump has its own motor. The motors
are mated to the vacuum pumps by a flange mounting and
coupling system. Some models include auxiliary cooling fans.
Maintenance instructions are provided for the vacuum pumps
and motors in the separate manual. Each vacuum pump has
an intake assembly that includes 10 micron polyester filters
for each pump with a small fitting or pipe plug for releasing
the vacuum and facilitating the removal of the filter covers
when the pump is isolated the system is still under vacuum.
Each pump has an in-line check valve and an anti-reverse flow
valve to prevent them from running backwards when off. An
inlet screen protects the pump from large particles entering
the rotor / vane area.
STANDARD CONTROL PANEL
Built in a Nema 4/12 enclosure, the controls are UL508A
labeled and NFPA compliant. The panels have a single
incoming power connection point and two control
transformers with supplementary fused protected on primary
and secondary circuits. Systems are designed for automatic
alternation via PLC control. Systems with two to four motors
utilize field adjustable vacuum switches. Systems with five
or more motors utilize a vacuum transducer. Each motor in
the system is equipped with a magnetic starter and lockable
motor protector circuit disconnect.
All systems have a 30 minute alternation cycle with 10 minute
minimum run timers for each pump to prevent short cycling
and motor damage. Additional features include:
• “ReservePumpinUse”alarmwithvisualandaudible
indicators.
• “ReserveTransformerinUse”visualindicator.
• “PowerOn”light
• “LampTest”pushbutton
• Audiblealarm“Acknowledge”pushbutton
• Alarm“Reset”pushbutton
• Drycontactsonalabeledterminalstripforremotealarm
connection.
• LightedHOAswitch
• Hourmeterforeachmotor
RECEIVER TANK
The receiver tank in a Powerex Medical Vacuum System
is plumbed so that it sees the system vacuum. It is not
pressurized in normal use and should not be connected to
any pressure sources. The ASME National Board registered
air receiver is provided with a manual drain valve as standard
and optional auto drain and sight tube set ups are available.
Systems may be built with receivers separately mounted or
with vacuum pumps and controls integrally mounted.
Factory installed receiver is
used for vacuum capacity only
and is NOT a collection receiver.
Never drill holes in,
or perform any
welding on receiver tanks (unless qualified by
ASME to do so) or use them beyond the rated
pressure settings. Never mount other machinery or
equipment on receivers.
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Claw Medical Vacuum Systems
Installation
Disconnect, tag and
lockout power before
attempting to install, service, relocate or perform
any maintenance.
Do not lift or move unit without
appropriately rated equipment.
Be sure the unit is securely attached to lifting device used.
Do not lift unit by holding onto tubes or coolers. Do not use
pumps to lift other attached equipment.
Installation of inlet / outlet air
plumbing from the system and
electrical connections must be in accordance with National
Fire Protection Association (NFPA99) Code Compliance for
Medical Gas Breathing Air (Level 1).
INSTALLATION SITE
1. The vacuum system must be located in a clean, well lit
and well ventilated area.
2. The area should be free of excessive dust, toxic or
flammable gases and moisture.
3. Never install the vacuum system where the surrounding
temperature is higher than 104° F or where humidity is
high.
4. Clearance must allow for safe, effective inspection and
maintenance.
MINIMUM CLEARANCES
Above 24 inches
Other sides 36 inches
5. If necessary, use metal shims or leveling pads to level the
system. Never use wood to shim the unit.
6. The frame is drilled to allow bolting to the floor. Secure
it as necessary. Rubber composite isolation pads should
be used to minimize transmission of noise and vibration
to the building. Additional measures for isolation may
be required. Drill a hole through the isolation pad and
center it under the mounting point.
7. Some systems are built with multiple frames and must be
installed and the air and electrical connections between
the frames made at the time of installation. Be sure to
install the system in the same configuration as shown on
the system drawing so that the flexible connection hoses
and electrical lines will fit.
VENTILATION
1. If the vacuum system is located in a totally enclosed
room, an exhaust fan with access to outside air make up
air must be installed.
2. Never restrict the cooling fan exhaust air. Maintain the
clearance listed above.
3. Never locate the vacuum system where hot exhaust air
from other heat generating units may be pulled into the
unit.
WIRING
Lock out and tag out
the electrical supply
before servicing the equipment.
Electrical shock
hazard. Make sure
the system is grounded in accordance with NEC and
local requirements.
All electrical hook-ups must be performed by a qualified
electrician. Installations must be in accordance with local and
national electrical codes. Make sure power supply conductors
are sized adequately for full system demand.
PIPING
The system may have temporary shipping supports in
place. These should be removed when the system piping
is connected to the building piping. Appropriate supports
should be added to the system when building tie in is
completed.
The system has a single point inlet with a flexible connector.
Each pump is supplied with a flexible connector for tying
in to the system exhaust. A drip leg should be placed in the
exhaust as close to the system as possible or multiple drip legs
can be used at each pump exhaust connection. The drip leg
must prevent collected condensation from draining back into
the pump or pumps.
1. Make sure the piping is lined up without being strained
or twisted when assembling the piping for the system.
2. The exhaust piping should be kept as short and have the
least restriction possible. The flex connector supplied by
Powerex may be repositioned (changed from vertical to
horizontal and the elbow turned or removed) if desired
to achieve a more effective installation to match the field
installed exhaust piping. Repositioning is desirable if the
final system plumbing design can be shorter by doing so.
3. Never use any piping smaller than the pump connection.
To determine the minimum required pipe size for a
vacuum system exhaust, calculate the equivalent straight
length of the run. Never use a pipe size smaller than the
flex connector supplied by Powerex or smaller than the
size shown in the 100 foot column on the chart for the
CFM of the pump. The equivalent straight length is the
length of all the pipe needed from the flex connector to
the final outlet plus a factor for each elbow, cross or tee.
Pipe must be smooth ID. If rough pipe is used, increase by
one size.
4. If a grating or grille is used at the end of the exhaust
pipe, make sure its open area is at least equal to the area
of the exhaust pipe.
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Claw Medical Vacuum Systems
Pipe Size Requirements
System CFM
5 1.0 1.25 1.5
7 1.0 1.25 1.5
11 1.25 1.5 1.5
21 1.25 1.5 1.5
26 1.25 1.5 2.0
32 1.25 1.5 2.0
38 1.5 2.0 2.5
52 1.5 2.0 2.5
58 1.5 2.5 2.5
63 2.0 2.5 2.5
65 2.0 2.5 3.0
87 2.0 2.5 3.0
104 2.0 3.0 3.5
111 2.5 3.0 3.5
154 2.5 3.0 3.5
156 2.5 3.5 4.0
168 2.5 3.5 4.0
195 3.0 3.5 4.0
258 3.0 3.5 4.0
260 3.5 4 5.0
387 3.5 4 5.0
516 4 5 6.0
If the system extends beyond 600 equivalent straight feet, use one
size larger pipe.
Minimum Pipe
Size for
100 feet
Minimum Pipe
Size for
300 feet
Minimum Pipe
Size for
600 feet
Approximate system CFM equals the number
of pumps running times CFM in table below.
(Data below is for reference only, if actual pump
CFM is higher than shown, use the higher value.)
HP
1.0 2.0
1.5 7
2.0 11 16
3.0 17 21
4.0 29
5.0 26
5.0 38
5.4 38
6.4 52
7.5 52 65
8.7 77
10.0 65 84
10.0 77
15.0 111 129
20.0 137
25.0 168
Vane Pump
CFM @ 19”
Claw Pump
CFM @ 19”
Pipe Size
1.5 3.75 feet 1.8 feet
2.0 5.0 feet 2.5 feet
2.5 6.25 feet 3.1 feet
3.0 7.5 feet 3.8 feet
3.5 8.78 feet 4.4 feet
4.0 10.0 feet 5.0 feet
5.0 12.5 feet 6.25 feet
Equivalent length
for 90° elbow, cross,
or tee
3.0 feet 1.5 feet
Equivalent length
for 45° elbow
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Claw Medical Vacuum Systems
Operation
BEFORE START UP
1. Make sure all safety warnings, labels and instructions
have been read and understood before continuing.
2. Remove any shipping materials, brackets, etc.
3. Ensure all fuses, circuit breakers, etc., are properly sized.
4. Verify that all pumps have the proper amount of oil in
them for operation. The claw type vacuum pumps require
oil in the gear boxes. See the enclosed manual from the
pump manufacturer for correct oil type to use.
5. Confirm electric power source and ground have been
firmly connected. Make sure the electrical control box
door is closed and latched.
6. Make sure inlet filter is properly installed and all piping
is connected. Open the isolation valves for each vacuum
pump. Open the valve to the receiver. Close the receiver
drain valve.
7. Make sure all selector switches on the control panel are
OFF.
Risk of injury.
Make sure no one in
contact with any moving parts during the rotation
check.
8. Check that all fuses, circuit breakers, etc., are the proper
size.
If all pumps are running in the
wrong direction, change the
incoming power leads to correct rotation.
On some claw vacuum pumps,
the fan is powered by a separate motor. The fan rotation direction may be different from
the main shaft rotation direction.
START-UP AND OPERATION
1. Followallproceduresunder“BeforeStart-Up”before
attempting operation of the vacuum pump.
2. Make sure all selector switches are in the OFF position.
3. Switch on electric source.
4. Open tank connection valve or valves completely.
5. Using the selector switches on the control panel, turn
oneachpump–motorinthe“Auto”modeuntilallare
running.
6. Check the vacuum level using the system gauge or
display. The control system will turn off the vacuum
pump motors when the vacuum level is maintained and
the minimum run timer conditions are satisfied.
7. Check for excessive vibration, unusual noises or leaks
during operation. If problems are detected, shut down
the system and make corrections or repairs as needed
before operating the system.
8. Pumpsmaybeoperatedin“Hand”modetooverride
the function of the automatic controls. The pumps and
thesystemwillnotbedamagedduring“hand”mode
operation. The pumps are equipped with automatic
vacuum limiting valves if needed to avoid damage.
9. In normal operation, leave all selector switches in the
“Auto”positionandallowthecontrolstocyclethepumps
as needed based on vacuum demand.
Switch breaker OFF if vacuum
pump will not be used for a
long period of time.
Sequence of Operations
All vacuum pumps will operate on a ten minute minimum
run timer (to prevent the short cycling of pumps) and
will alternate Lead, Lag and etc. every 30 minutes, unless
interrupted by the Lead / Lag Freeze (see example below.)
For example, a vacuum switch closes 25 minutes into the 30
minute alternation sequence; pump 1 is activated and held
on for its ten minute minimum run time. The alternation
sequence will be extended to a total of 35 minutes. During
the following 30 minutes, if a vacuum switch closes, pump 2
will be activated and held on for its ten minute run time. This
operation is referred as the Lead / Lag Freeze. Its purpose is
to prevent short cycling of pumps in the event that a vacuum
switch is activated at the end of an alternation period.
The Reserve (or last Lag) Vacuum Switch will bring on the
reserve or last pump in the system and activate the Reserve
Pump In Use Alarm.
The Vacuum Switch’s are factory set to the system
specifications. It is not recommended to adjust the settings
in the field. An adjustment to the setting could result in
inconsistent PLC operation and possible malfunction of the
system controls. Please consult your service contractor if
adjustments are required.
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Claw Medical Vacuum Systems
Maintenance
LUBRICATION
Refer to the manual from the vacuum pump manufacturer
If the gas being pumped
through the vacuum system
is known to be incompatible with petroleum based oils, the
user must drain and refill the vacuum pumps with suitable oil
before use. Failure to do so will void the warranty.
for lubrication intervals and type of oil to use. Oilless claw
vacuum pumps have gear boxes that must be maintained and
the gearbox oil needs to be changed at specified intervals.
Maintenance Schedule
Operating Hours
Item Action needed 500 2500 3000 5000 10,000 15,000 20,000 Remarks
Inlet air filter Replace
Blower fan Clean
Fan shield Clean
Pump fans Clean
Vacuum switch Inspect
l s l
Every 3,000 hours or less
l l l l
l l l l
l l l l
l l l l
Gear oil Replace
l s
Every 3,000 hours or less
l Inspect
s Replace
NOTES:
1. Inspect and perform maintenance periodically according to maintenance schedule.
2. The maintenance schedule relates to the normal operating conditions. If the circumstances and load condition are adverse,
shorten the interval time and perform maintenance accordingly.
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Claw Medical Vacuum Systems
Troubleshooting Guide
PROBLEM CAUSE CORRECTIVE ACTION
Lag Alarm Overload Tripped 1. Reset overload; if problem continues, check motor amp draw
2. Verify overload is set to the correct service factor
3. Verify wire gauge is correct for amp draw
PLC Failure 1. Check PLC for red error light; replace PLC
2. Check PLC for flashing green light; if 24V DC is present on the last
input, then reprogram PLC with E-Prom chip
Pump / Motor Failure 1. Check drive coupling; replace if needed
2. Verify that pump shaft turns freely; repair or replace as necessary
3. Check vacuum discharge piping to verify air is being exhausted; repair
or replace as necessary
4. Verify voltage to the motor; repair wiring or replace motor as
necessary
Vacuum Consumption 1. Repair leaks
2. Inspect purge valves are closing; repair or replace as necessary
3. If scroll pump is running backwards, replace check valve
Switch Failure Check continuity on lead vacuum switch
High Temperature Alarm High Temperature Verify ambient temperature is below 104 ° F
Lost Connection Inspect high temperature probe and connections; replace if necessary
Notes
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Claw Medical Vacuum Systems
Powerex Limited Warranty
Warranty and Remedies.
(a) General. Powerex warrants each Compressor System, Vacuum System, Vacuum Pump, Compressor Air-End, or Powerex branded
Accessory (collectively “Products”, individually each a “Product”) to be free from defects in material and workmanship (“Defects”)
at the date of shipment. EXCEPT AS SET FORTH BELOW, NO OTHER WARRANTY, WHETHER EXPRESS OR IMPLIED, INCLUDING ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, SHALL EXIST IN CONNECTION WITH THE SALE OR USE
OF SUCH PRODUCTS. TO THE EXTENT PERMITTED BY LAW, ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. All claims under this
warranty must be made in writing and delivered to Powerex, or such claim shall be barred. Upon timely receipt of a claim, Powerex shall
inspect the Product claimed to have a Defect, and Powerex shall repair, or, at its option, replace, free of charge, any Product which it
determines to have had a Defect at the time of shipment from Powerex; provided, however, that if circumstances are such as to preclude
the remedying of Defect by repair or replacement, Powerex shall, upon return of the Product, refund to buyer any part of the purchase
price of such Products paid to Powerex. Freight for returning Products to Powerex for inspection shall be paid by buyer. The warranties
and remedies herein are the sole and exclusive remedy for any breach of warranty or for any other claim based on any Defect, or nonperformance of the Products, whether based upon contract, warranty or negligence.
b) Initial Period of Warranty – Parts and Labor. Powerex warrants and represents all Products shall be free from Defects for the
first twelve (12) months from the date of shipment by Powerex, or five thousand (5,000) hours of use, whichever occurs first. During
such warranty period, Powerex shall be fully liable for all Defects in the Products (the “Product Defects”), i.e., all costs of repair or
replacement, which may include “in and out” charges, so long as the Products are located in the continental United States, and the
Products are reasonably located and accessible by service personnel for removal. “In and out” charges include the costs of removing a
Product from buyer’s equipment for repair or replacement.
(c) Additional Period of Warranty – Parts Only (No Labor). In addition to the above, Powerex warrants each Powerex branded
Compressor Air-End, and Vacuum Pump shall be free of Defects for a period of thirty-six months from the date of shipment of Product, or
10,000 hours of use, whichever occurs first. Supplier’s repair or replacement of any Product shall not extend the period of any warranty of
any Product. This warranty applies to the exchange of part(s) found to be defective by an Authorized Powerex Service Center only.
(d) Coverage. The above mentioned warranty applies to Powerex manufactured units or systems only.
(e) Exceptions. Notwithstanding anything to the contrary herein, Powerex shall have no warranty obligations with respect to Products:
(i) that have not been installed in accordance with Powerex’s written specifications and instructions;
(ii) that have not been maintained in accordance with Powerex’s written instructions;
(iii) that have been materially modified without the prior written approval of Powerex; or
(iv) that experience failures resulting from operation, either intentional or otherwise, in excess of rated capacities or in an otherwise
improper manner.
(f) The warranty provided herein shall not apply to: (i) any defects arising from corrosion, abrasion, use of insoluble lubricants, or
negligent attendance to or faulty operation of the Products; (ii) ordinary wear and tear of the Products; or (iii) defects arising from
abnormal conditions of temperature, dirt or corrosive matter; (iv) any OEM component which is shipped by Powerex with the original
manufacturer’s warranty, which shall be the sole applicable warranty for such component.
Limitation of Liability. TO THE EXTENT ALLOWABLE UNDER APPLICABLE LAW, NOTWITHSTANDING ANYTHING TO THE CONTRARY
HEREIN, UNDER NO CIRCUMSTANCES SHALL POWEREX BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTAL, PUNITIVE, SPECULATIVE OR
INDIRECT LOSSES OR DAMAGES WHATSOEVER ARISING OUT OF OR IN ANY WAY RELATED TO ANY OF THE PRODUCTS OR GOODS SOLD
OR AGREED TO BE SOLD BY POWEREX TO BUYER. TO THE EXTENT ALLOWABLE UNDER APPLICABLE LAW, POWEREX’S LIABILITY IN ALL
EVENTS IS LIMITED TO, AND SHALL NOT EXCEED, THE PURCHASE PRICE PAID.
Warranty Disclaimer. Powerex has made a diligent effort to illustrate and describe the Products in this literature accurately; however,
such illustrations and descriptions are for the sole purpose of identification, and do not express or imply a warranty that the Products are
merchantable, or fit for a particular purpose, or that the Products will necessarily conform to the illustrations or descriptions.
Product Suitability. Many jurisdictions have codes and regulations governing sales, construction, installation, and/or use of Products for
certain purposes, which may vary from those in neighboring areas. While Powerex attempts to assure that its Products comply with such
codes, it cannot guarantee compliance, and cannot be responsible for how the product is installed or used. Before purchase and use of a
Product, please review the Product applications, and national and local codes and regulations, and be sure that the Product, installation,
and use will comply with them.
Claims. Claims pertaining to the Products, with the exception of warranty claims, must be filed with Powerex within 6 months of the
invoice date, or they will not be honored. Prices, discounts, and terms are subject to change without notice or as stipulated in specific
Product quotations. All agreements are contingent upon strikes, accidents, or other causes beyond our control. All shipments are
carefully inspected and counted before leaving the factory. Please inspect carefully any receipt of Products noting any discrepancy or
damage on the carrier’s freight bill at the time of delivery. Discrepancies or damage which obviously occurred in transit are the carrier’s
responsibility and related claims should be made promptly directly to the carrier. Returned Products will not be accepted without prior
written authorization by Powerex and deductions from invoices for shortage or damage claims will not be allowed. UNLESS OTHERWISE
AGREED TO IN WRITING, THESE TERMS AND CONDITIONS WILL CONTROL IN ANY TRANSACTION WITH POWEREX any different
or conflicting terms as may appear on any order form now or later submitted by the buyer. All orders are subject to acceptance by
Powerex.
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
1-888-769-7979 • www.powerexinc.com
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