Ohio Medical SELECTORR Series User manual

255571 (Rev. 1) 01/20
SELECTORR®Series Claw Vacuum Pump
C30 Model
Installation & Operation Manual
®

2255571 (Rev. 1) 01/20
INSTALLATION & OPERATING MANUAL
SELECTORR®SERIES CLAW VACUUM PUMPS C30
Please read the manual before operating the vacuum pump.
TABLE OF CONTENTS
1.0 INSTALLATION 3
1.1 General Description 3
1.2 Unpacking 3
1.3 Location 3
1.4 Power Requirements 4
1.5 Vacuum Connections 5
1.6 Oil Filling on Gear Box 5
2.0 SAFETY 6
2.1 General Notices 6
2.2 Warning Labels and Explanation 6
2.3 Location of Labels 6
3.0 OPERATION 7
3.1 Start-up 7
3.2 Stopping the Pump 7
3.3 Ambient Operating Conditions 7
4.0 MAINTENANCE 8
4.1 Pump Lube Oil (level, type, quantity, change) 8
4.2 Maintenance Chart 8
5.0 PROBLEM SOLVING 9
6.0 TECHNICAL DATA 10
7.0 ASSEMBLY DRAWING AND PARTS LISTS 12
NOT CONTROLLED
DO NOT DISTRIBUTE

3
255571 (Rev. 1) 01/20
INSTALLATION AND OPERATING MANUAL
This manual covers the C30 contact-less operating claw type vacuum pumps. The model number is
stamped into the nameplate with serial number: C30.
Please identify the model number and serial number when ordering parts.
1.0 INSTALLATION
1.1 General Description
The C30 vacuum pump is a dry and contactless machine, enclosed in an acoustic
sound shield, designed to have cooling air passed through the sound shield by a fan.
The warm air is exhausted to the below compartment where the silencer is located.
The C30 is built with modular construction consisting of two compartments: pumping
and gear chambers separated by the use of labyrinth seals. In the pumping chamber,
as two rotary claws rotate in opposite directions, the air is sucked in, compressed and
discharged under pressure. In the gear chamber (box), two gears for synchronizing
of the claws’ rotation are lubricated with oil. The pumps are direct driven by a anged
motor via a coupling. The 4” aluminum check valve for anti suck back and inlet lter
(anged) can be installed separately. The C30 is well suited to use with Variable
Frequency Controlled Drives for energy savings.
1.2 Unpacking & Storage
Inspect the box and vacuum pump carefully for any signs of damage incurred in transit.
Since all pumps are ordinarily shipped F. O. B. from our factory or regional warehouse,
such damage is the normal responsibility of the carrier and should be reported to them.
The inlet and exhaust of the pump are covered with plastic caps to prevent dirt and
other foreign substances from entering it. Leave these caps in place until you are ready
to pipe the pump to your equipment.
The pump should be stored in a dry environment with normal air humidity (RH 0~80%,
14 to 140°F) for no more than 6 months.
1.3 Location
Install the pump in a horizontal position on a level surface so that it can be evenly
supported on its rubber feet.
Leave 8 to 10 inches of access around the pump to allow proper cooling. Also,
adequate ventilation must be provided for cooling of the pump and motor.
Allow access to the oil sight glass in order to inspect the oil level regularly, and the oil ll
and drain ports for easy service.

4255571 (Rev. 1) 01/20
The motor must be connected according to the electrical codes through a fused switch
in order to protect the motor against electrical or mechanical overload conditions. The
overload of the motor starter must be set at a level equal to the full load motor current
listed on the motor nameplate.
If the pump is supplied with a motor starter, it is preset at the factory according to
customer specications. It is advisable to check that these settings are in line with the
voltage at your location. If the voltage is di󰀨erent, please contact Ohio Medical for motor
and starter information.
Correct direction of rotation is marked by an arrow on the motor fan housing and is
counterclockwise when looking at the motor from the motor’s fan side.
After electrical connections have been made, the rotation of the motor should be
checked. If backward, reverse any two leads of the three at the power connection.
Low Voltage
High Voltage
Delta Connection
Star Connection
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
L1 L2 L3
Wiring Scheme - Three Phase Motor
1.4 Power Requirements
A schematic diagram for the electrical motor terminal connections is located in the junction
box of the motor or on the motor nameplate. Typical wirings for Three Phase Motors are as
below:

5
255571 (Rev. 1) 01/20
The following ange sizes are standard on the pumps:
Pump Models Inlet Size Exhaust Size
C30 4” 4”
1.6 Oil Filling on Gear Box
The pump is shipped without oil in the gear
box. After level installation and correct rotation
has been established, ll the pump with
recommended gear oil through the oil ll port.
Oil level should be over 3/4 position on the oil
sight glass as shown on the label.
We recommend ISO VG150 gear oil or equivalent oils.
Ohio Medical gear oil in 1-gallon container—part # 249225
The following provides the approximate amount of oil required for each model.
Pump Model Capacity (Quart)
C30 3.4
Do not add oil with vacuum pump running! Do not overll.
1.5 Vacuum Connections
Use a pipe size that is at least the size of the pump inlet connections. Smaller lines
result in reduced pump capacity.
Pumps operating in parallel on a common main line should have a manual or automatic
operated shut-o󰀨 valve or positive action check valve, installed in the suction line
adjacent to the pump suction ange. The built-in anti-suck back valve should not be
used as a shut-o󰀨 valve for the vacuum system.
Remove the plastic protective cap from the inlet port prior to connection of pump to the system.
Should process gas contain dust or other foreign particles, a suitable inlet lter should
be connected to the inlet port. Consult Ohio Medical for recommendations or refer to the
“Vacuum Pump Filters” tab at www.ohiomedicalparts.com.
The vacuum piping should be designed to ensure that no liquids such a condensate
or liquid carried over from the process can reach the pump. If this possibility
exists, a knock-out liquid separator should be installed. Consult Ohio Medical for
recommendations or refer to the “Vacuum Pump Filters” tab at www.ohiomedicalparts.com

6255571 (Rev. 1) 01/20
2.3 Location of the Labels
The labels of 2.2.1 Read and Understand manual, 2.2.2 Burn Hazard, and 2.2.3 Loud
noise Hazard shall be shown on the top of sound shield of the pump.
The label of 2.2.4 Hazardous Voltage shall be shown on the cover of motor’s terminal box.
2.0 SAFETY
Please read the following safety notice carefully before operating the pump.
2.1 General Notices
• Thoroughly familiarize yourself with this installation and operating manual before
operation.
• Only authorized and trained operators should operate the vacuum pump.
• If the pump is not properly working, it should be stopped immediately.
• Ohio Medical shall have no liability for any accident or failure arising from non-
compliance with instructions in this manual.
2.2 Warning Labels and Explanations
Following warning labels are shown and attached on the C30 vacuum pump.
2.2.1 Read and Understand manual:
Read and understand operator’s manual before using this machine.
2.2.2 Burn Hazard:
Hot surface. Do not touch.
2.2.3 Loud noise Hazard
Loud noise hazard. Ear protection must be worn.
2.2.4 Hazardous Voltage:
Disconnect power before opening. Contact causes severe electrical shock

7
255571 (Rev. 1) 01/20
3.0 OPERATION
3.1 Start-up
Check rotation of the motor as described in paragraph 1.4 Power Requirements.
Fill the pump with oil as described in paragraph 1.5 - Oil Filling
Start the pump with the inlet closed. Run the pump for a few minutes and then shut
down. Check the oil level again and make sure the oil level is over 3/4 position of oil
sight glass as shown on the label.
Add oil though oil ll port, if necessary. Pump oil should only be added when the pump
is o󰀨
3.2 Stopping the Pump
To stop the pump, turn o󰀨 the power. An anti-suck back valve (built-in) for these pumps
installed in inlet ange will prevent the air from back owing into the vacuum chamber
after the pump is shutdown.
Caution: In applications, where the quantity of water vapor is moderate, it is
recommended to run the pump for 10 minutes at least with outside air prior to
shut down to prevent the vapor from condensing in the pump.
3.3 Operating Conditions
The C30 are designed to run the ultimate vacuum levels stated in technical data (6.0)
for continuous operation. Operation over maximum vacuum level may result in failure of
and severe damage to the machine.
Vacuum Regulator installed in inlet ange is set at maximum allowable vacuum at
factory, and a desired vacuum level to below the maximum level can be achieved
by rotating the adjustment knob.
The standard version is for use of dry air only, and may not be used in hazardous
areas. Handling of humid air or gases containing aggressive chemicals is possible
only with specially congured units. Consult Ohio Medical for assistance.
Excessive back pressure on the unit may result in excessive current draw.
Do not operate the vacuum pump over 2 psi back pressure.
Also it is recommended for operating personnel who are working near the pump to wear
ear protectors. If noise below the designed dBA is required, an external sound enclosure
can be added to the system, provided adequate ventilation is provided.
The ambient and suction air temperature must be between 40°F and 104°F.
Caution: Any non compliance may lead to severe injury to persons and damage to the
pump.
Caution: Maximum number of motor starts per hour should not exceed 10 per hour.
Excessive starting of the motor can cause overheating and premature failure of the
motor. A minimum run timer should be used with any panel that may control the pump
with automatic starts and stops based on system pressures.

8255571 (Rev. 1) 01/20
Weekly Check inline inlet lter element / mesh. More
often if high particulates in inlet stream.
Monthly Check the oil level, protective mesh.
Semi-Annually Check fans and coupling.
Annually
Check bearings / shaft seals / vacuum
regulator. More frequently if operated at
ambient temperature exceeding 68°F.
Every 3000
Operating Hours Change the oil in the gear box.
Inspection hole with G1” plug: Check
the coupling and its insert, and fan
through this hole regularly.
4.0 MAINTENANCE
The C30 vacuum pump requires very little maintenance. To ensure optimum performance, the
following maintenance steps should be followed:
4.1 Gear Box Oil
4.1.1 Oil Level
Check the oil level on a monthly basis. Under normal circumstances, it should
not be necessary to add oil between oil changes. A signicant drop in oil level
means there is an oil leak. Please check the O-rings, drain plug or oil sight glass.
Check the oil level only when the pump is shut o󰀨. Replenish oil if it drops
below bottom position of the sight glass.
Caution: Do not add oil while the pump is running, since hot oil can escape from the oil ll port.
4.1.2 Oil Type and Quantity
See section 1.5 - Oil Filling - for details on oil type and capacity.
4.1.3 Oil Change
Under normal ambient conditions with proper Gear Oil, it is recommended to change
the oil every 3,000 operating hours or every 6 months. It is necessary to make the rst
oil change between 500 ~1000 operating hours.
4.2 Maintenance Chart

9
255571 (Rev. 1) 01/20
5.0 PROBLEM SOLVING
5.1 Problem: The pump does not reach capacity.
5.1.1 Possible Cause: Inlet screen (mesh) of the inlet lter clogged with debris.
Remedy: check inlet lter element and clean screen (mesh) by
compressed air or wash it.
5.1.2 Possible Cause: Pipe work is too long or small.
Remedy: Use a bigger diameter pipe and shorten the lines length
if possible.
5.2 Problem: The pump runs over set pressure.
5.2.1 Possible Cause: Inlet screen (mesh) in the vacuum regulator clogged with debris.
Remedy: Clean screen (mesh) and check inlet lter element.
5.2.2 Possible Cause: Vacuum regulator set over the set point or is out of order.
Remedy: Set the point again or replace it with new regulator.
5.3 Problem: Vacuum pump does not reach the set pressure.
5.3.1 Possible Cause: Leak on the pump or system.
Remedy: Check the leak on the pump or system.
5.4 Problem: The pump is extremely noisy.
5.4.1 Possible Cause: Contamination of the claws or chamber.
Remedy: Clean the pumping chamber and the claws.
5.4.2 Possible Cause: Coupling insert is worn.
Remedy: Replace coupling insert in motor/pump coupling.
5.4.3 Possible Cause: Bearing noise.
Remedy: Replace bearings or call service agent for service or exchange
program.
5.4.4 Possible Cause: Vacuum regulator noise.
Remedy: Replace vacuum regulator.
5.5 Problem: The pump will not start.
5.5.1 Possible Cause: Supply voltage is not proper or is overloaded. Motor starter
overload settings are too low or improper; fuses are burned;
wire size is too small or too long causing a voltage drop.
Remedy: Check voltage supply; overload settings in motor starter for size
and settings according to motor nameplate. Install proper size
wire. If ambient temperature is high, use the next larger size
overloads, or adjust settings 5% above motor nameplate value.
Remedy: Repair or replace if needed or call service agent for service or
exchange program.

10 255571 (Rev. 1) 01/20
5.6 Problem: The pump is running abnormally hot.
5.6.1 Possible Cause: Not enough air ventilation to pump.
Remedy: Make certain a su󰀩cient amount of fresh air is supplied to
the pump. Check for dirty or blocked mesh, clean mesh as
necessary.
5.7 Problem: The pump will not operate (seized up).
5.7.1 Possible Cause: Rotary claws, bearings or gears stuck on.
Remedy: Call service agent for service or exchange program.
6.0 TECHNICAL DATA
VACUUM APPLICATION SPECIFICATIONS
Model C30
CFM
60 HZ 670
50 HZ 558
HP
60 Hz 30
50 HZ 25
RPM
60 Hz
3450/2850
50 HZ
dB(A), Max +- 3 tolerance
60 Hz 85
50 HZ 82
Ultimate Vacuum
Maximum 26 inHg
Ultimate Vacuum
Continuous 24 inHg
Voltage Available 220~240/380~420V x 50/60Hz, 400/690Vx 50Hz, 208~230/460V x 60Hz
Oil Capacity (Gear box) 1½" quarts
Inlet / Outlet Connection 4” ange
Ambient
Operating Temperature 41-104° F
Pump Weight
(without motor) 1730 pounds
Accessories Non Return Valve, Vacuum Regulator, Exhaust Silencer, Inlet Filter 4” Flanged

11
255571 (Rev. 1) 01/20
C30 CLAW VACUUM PUMP WITH 30 HP NEMA 286TC MOTOR

12 255571 (Rev. 1) 01/20
ASS'y DRAWING
VCX-1005
ASSEMBLY DRAWING
C30

13
255571 (Rev. 1) 01/20
C30 PART LIST
POS
#Description Qty
1 Gear Box Housing 1
2 Gear Box Cover (rear) 1
4 Pump Housing Cover 1 (End Plate) 1
6 Fan Housing 1
10 Sleeve 2
11 Shaft 1 1
12 Shaft 2 1
13 Gear 2
15 Rotor 1 1
16 Rotor 2 1
17 Spacer 2
18 Piston Ring 4
19 Sleeve 2
20 O-Ring 2
21 Shaft Seal 65x85x9t 2
22 Bearing, 2
23 Bearing cover 2
25 Key, for Gear 2
26 Key, for Coupling 1
27 Sleeve 2
28 Power Lock 4
30 Flinger 2
31 Sleeve, 2
32 Bearing 2
33 Locking Disk (Coupling) 1
34 O-Ring 1
35 Sleeve, 1
36 Shaft Seal, 52x68x10t 1
37 O-Ring, Compressor cover, 1
38 O-Ring, Gear Box cover, 1
39 Dowel Pin ø10x30 4
40 Locking Disk 1
41 Sleeve, 1
47 Locking Disk, Front 2
52 Gasket, Exhaust Silencer, Steel Silencer 1
57 Stud M16x40 4
58 Rubber Bu󰀨er 13
59 Silencer assembly steel 1
60 Inlet Flang 1
61 Inlet screen (Conical ) 1
62 Gasket, Inlet Flange 1
73 Accoustic Mat for Shield Cover, End 1
74 Accoustic Mat for Shield Cover, Front 1
76 Plate (vertical) 1
77 Accoustic Mat 1
81 Gasket, Oil Sight Glass 1
83 Oil Sight Glass 1
85 Pipe, for Drain Plug 1
86 Gasket, Drain Plug 2
87 Drain Plug 1
88 Oil ller Breather, Plastic 1
89 O-Ring for Oil ller, for PN 100.088.00 1
90 Shield Cover, End 1
91 Shield Cover, Bottom Front 1
92 Shield Cover, Bottom 1
93 Accoustic Mat for Shield Cover, Base 1
94 Shield Cover, Side 1
95 Shield Cover, Front 1
96 Accoustic Mat for Shield Cover, top 1
97 Foot, Rubber 9
98 Accoustic Mat for Shield Cover, side (Right) 1
99 Accoustic Mat for Shield Cover, side (left) 1
100 Coupling, Pump Side 1
101 Insert, Coupling 1
102 Coupling, Motor Side 1
103 Fan, New 1
104 Flange Adapter fan housing side (NEMA) 1
105 Flange Adapter motor side (NEMA) 1
110 Motor 1
120 Vacuum Regulator 1
129 Eye Bolt M16 2
130 Label, Direction Arrow 1
131 Name Plate 1
148 Plug G-1", Inspection hole 1
149 Label, Inspection hole 1
158 Base 1
159 Cover, Exhaust 1
160 Seal 1
161 Flanged Pipe 1
162 Gasket, Silencer Inline 2
163 Silencer Inline 1
217 Round Head Bolt / M5 x 12 5
570 Washer, Spring Lock, 6mm 4
571 Washer, Spring Lock, 16mm 24
574 Washer, Spring Lock, 12mm 27
577 Hexagon Nut M12 5
641 Hex. Socket Head Cap Screw / M6 x 12 10
644 Hex. Socket Head Cap Screw / M10 x 15 12
646 Hexagon Nut M16 20
649 Hexagon Bolt / M16x40 8
650 Hexagon Bolt / M16x40 4
651 Hexagon Bolt / M16x40 8
652 Hexagon Bolt / M16x50 (NEMA) 4
653 Hex. Socket Head Cap Screw / M12
(NEMA) 4
654 Hex. Socket Head Cap Screw / M16x45 4
655 Washer, Spring Lock, 12mm 4
656 Hex. Socket Head Cap Screw / M12 x 25 2
670 Hex. Socket Head Cap Screw / M12 x 40 8
671 Hex. Socket Head Cap Screw / M12 x 50 6
678 Hex. Socket Head Cap Screw / M20 2
679 Hex. Socket Head Cap Screw / M12 x 70 4
707 Set Screw / M8 x 15 4
712 Set Screw / M12 14
724 Botton Flange Bolt M5x8 26
725 Botton Flange Bolt M5x12 12
Option: Inlet Filter with Check Valve
60 Inlet Flange, welded Nipple / DN100 PN6 2
62 Gasket, Inlet Flange 2
150 Inlet Filter IF-400 1
153 Elbow with Flanged DN100 PN6 + DN100
PN10 1
571 Washer, Spring Lock, 16mm 12
646 Hexagon / Nut M16 12
647 Hexagon Bolt / M16x50 8
648 Hexagon Bolt / M16x60 4
700 Check Valve, CV-100 1

North America
United States
Customer Service, Distribution Center
Technical Support, Sales and Service
Equipment Service Center
Ohio Medical LLC
1111 Lakeside Drive
Gurnee, IL 60031 USA
[phone]
www.ohiomedical.com
®
© 2020 Ohio Medical LLC. This document contains information that is proprietary and condential to Ohio Medical LLC. Use of
this information is under license from Ohio Medical LLC. Any use other than that authorized by Ohio Medical LLC is prohibited.
Ohio Medical, the Ohio Medical logo, are registered trademarks of Ohio Medical LLC.
255571 (Rev. 1) 01/20
Maintenance parts for your claw vacuum pump are listed at:
https://www.ohiomedicalparts.com/products/rotary-claw-vacuum-pumps-oil-less.php