(0512) "We Pass Your Gas"

AIR DIMENSIONS INCORPORATED 1371 West Newport Center Dr., Suite 101, Deerfield Beach, FL 33442 Phone 954-428-7333 or 800-423-6464 Fax 954-360-0987 www.airdimensions.com info@airdimensions.com

R-Series DIA-VAC® PUMP WITH IECEx Flameproof Motor MAINTENANCE AND DISASSEMBLY INSTRUCTIONS

A. General Opera ons Characteris cs

1. The flameproof proof IECEX motors u lized on the R-Series Dia-Vac® pumps are CE and IECEx Cer fied EExd IIC T4 IP56 II2GD for hazardous areas.

2. The motor is rated for ambient temperatures not to exceed 55°C (131°F). Please refer to wiring diagram on page (2).

3. The Dia-Vac® normally runs at 55 to 66°C (130 to 150°F). It is not an indica on of trouble if the outer surfaces of the Dia-Vac® Pump or motor are hot to the touch. 4. To check pumping efficiency, employ suitably damped gauges connected so as to dead-end either pressure or vacuum. NOTE: Check each separately, One or the other port must be open during this test. Use 0-60 PSI pressure gauge and 0-30 inch hg. vacuum gauge, (or mercury manometer.)

Minimum opera ng outlet pressure should be 50 PSIG per head for the .222 eccentric. Minimum vacuum should be 24 InHgG per head for the .222 eccentric *For eccentric sizes other than .222, please refer to the values on the website for your model pump - h p://www.airdimensions.com/PerformanceOp ons/Standard.aspx. 5. The Dia-Vac® normally runs quietly, especially when both pressure and vacuum ports are connected into a closed system. An obvious knock or ra le could indicate a problem. Check through "Disassembly and Inspec on Procedures" with par cular a en on to the ghtness of all screw fasteners. 6. All bolts and screws except A19005 and A19006 should have one drop of Loc te® Removable 242® (or equivalent) on threads before ghtening.

230v 1 Phase

230v 3 Phase

115v 1 Phase

400v 3 Phase

Attention:All ATEX and IEC motors are supplied with a PTO thermal protectiondevice (internal bi-metallic switch). The PTO does not interrupt power to the motor when it trips.A contactor must be used in conjunction with the PTO toprotect the motor from overheating. Failure to connectthe PTO properly to a contactor can result in motor failure.

PTO Wiring Diagram & Jumper Locations F71, F80 and L80

Voltage

Voltage

Voltage

Voltage

Voltage

Voltage

Voltage

Voltage

Voltage

Voltage

Ground

PTOTerminal

W2

U1 U2

V2

V1

W1

Jumper

LineLine

ADS-1148/1/12

Contactor

(0512) "We Pass Your Gas"

B. Maintenance Procedures

1. Motor Maintenance

No oiling or other lubrica on addi on is necessary at all with the Dia-Vac® pump. 2. Diaphragm Replacement (See also Maintenance Procedure Below)

a. Standard EPDM (part A04002 or complete repair kit 11009).

b. Teflon® coated EPDM (part A04001 or complete repair kit 11005).

c. Viton® (part A04003 or complete repair kit 11007).

d. All Teflon® (part A04009 or complete repair kit 11011)

The degree of usage and condi on of opera ng temperatures or pressure will determine the rate of replacement of part or parts. For heavy loads (25-75 PSI) and constant opera on the diaphragm should be inspected at least every six months.

For lighter loads (0-15 PSI or up to maximum vacuum) the diaphragm may operate successfully for a year or more. The corrosive content of the gas media being pumped can effect the recommended inspec on and replacement cycle or the diaphragm.

*Diaphragms require close precision tolerance, therefore only ADI diaphragms should be used as replacements.

C. Disassembly of Head Sec on and Diaphragm

1. Remove head sec on by unscrewing the four large bolts. A flat-bladed screw driver may be needed to gently pry the head free of the service diaphragm. **If you have Teflon® coa ng on the heads use cau on not to scratch the surface. 2. The valve body can then be removed by unscrewing the two smaller screws (also accessible on the top of the head sec on). This part may be freed by gently tapping on these two screws a er they have been loosened about three or four turns.

3. When the valve body is removed, check all internal surfaces for any accumula on of dirt. The two valve discs can be wiped clean and replaced as long as they appear unaffected by usage. The valve gasket can be easily removed and should be inspected. As a ma er of good prac ce, the valve discs and valve gasket should be replaced during any rou ne maintenance check of the head sec on. A once a year rou ne procedure is recommended.

4. The diaphragm is secured by the single screw in its center. Remove this screw with a 5/32" Allen wrench. The diaphragm and its clamping plate should be easily li ed off. Some slight adherence to the metal may occur if the diaphragm has been in use for a long period. Discard the used diaphragm and Teflon washer seal under the plate screw. Before installing the new diaphragm; be sure to use a new Teflon Washer seal (A23001) under the plate screw (A19007). Do not use Teflon tape. Once the diaphragm, plate, washer and screw are assembled, ghten the plate screw to 70 in-lbs. of torque.

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NOTE: When replacing the diaphragm, be sure the four projec ng studs of the base cas ng are properly located in the four outer holes provided in the diaphragm before the part is clamped in place. Be sure the diaphragm plate is firmly replaced with its center screw.

D. Disassembly of the Connec ng Rod

1. Remove head sec on and service diaphragm as described in (C) above. 2. Remove the front plate from the face of the base cas ng by removing the four retaining screws. 3. Using a hex socket wrench, remove the hex head bolt on the connec ng rod top surface. This will release the connec ng rod cap (A03001) which may then be li ed off. 4. The connec ng rod assembly on single head units, including the counterweight, is held in place by the counterweight screw. This can be loosened by a 3/16" Allen wrench. The connec ng rod assembly may then be slid off the motor sha . On the dual and quad head units the assembly is held in place by the set screw. This can be loosened by a 1/8" Allen wrench and the assembly may then be slid off the motor sha .

E. Replacement of the Connec ng Rod 1. Replace the connec ng rod assembly on the motor sha , taking care to align set screw or counterweight screw as squarely as possible on the flat of the motor sha . 2. Replace the connec ng rod cap and connec ng rod bolt. Tighten this assembly firmly with the hex socket wrench. (150 inch lbs. of torque) 3. Put a new Diaphragm in place taking care to locate it over the four projec ng studs on the top face of the base cas ng.

F. Related Torque Values / Running Amps

1. Head bolts - 110 inch pounds. 2. Valve body screws and Diaphragm plate screws - 70 inch pounds. 3. Connec ng rod bolt - 150 inch pounds.

G. Motor Amperage 1. ADI offers a variety of IECEx motors. Always check nameplate amps on actual motor or contact factory.

Teflon® and Viton® are Registered Trademarks of E.I. Du Pont Dia-Vac® is a Registered Trademark of Air Dimensions Inc.

"We Pass Your Gas"