SANDPIPER RS20 Metallic - Manual (Page 28)

rs30mdl1sm_haz duty-rev0614 Model RS30 Hazardous Duty Metallic Page 26
VALVE, POPPET
CONTROL MODULE
POWER GENERATION MODULE
CAPSCREW, HEX SOC HD
M6 X 1.0 X 35
COVER
SEAL, O-RING
SEAL, O-RING
SEAL, O-RING
O-RING
O-RING
CAPSCREW, HEX SOC HD
M6 X 1.0 X 25
CAPSCREW, HEX SOC HD
M6 X 1.0 X 25
CONNECTOR (Power
Generation Module to
Control Module)
CONNECTOR
(Control Module to Power
Generation Module)
CONNECTOR
(To Intermediate)
Page 26
WASHER, FLAT, M6
AirVantage Servicing - Control Module
To service the control module, first shut off and bleed the air being supplied to the pump. For safety
purposes the air supply line should be disconnected from the pump. Then shut off the suction and
discharge lines to the pump. Bleed the pressure from the pump suction and discharge lines and remove
the lines from the pump. During the servicing of the AirVantage, consult the “AirVantage Composite
Repair Parts Drawing”.
Step #1: Remove the Patch Cable
• Twist the ribbed portion of the patch cable connector in a counterclockwise direction, until it
unthreads from the connector. The cable can either be removed from the intermediate or from the
control module.
Step #2: Remove the AirVantage from the Pump
• Use a ½” socket and remove the four 5/16-18 x 5 cap screws that hold the AirVantage to the
pump. Be sure to support the weight of the AirVantage while removing the last cap screw. After the
AirVantage is removed from the pump, set the unit down on the plastic cover located on the bottom.
Inspect the o-ring between the poppet valve and the adapter plate for damage.
Step #3: Access the Pilot Valve
• Use a 5mm hex-key wrench and remove four M6 x 35mm socket head cap screws & washers
securing the top cover on. Lift the cover off, exposing the pilot valve. There is a molded o-ring seal
located on the underside of the cap. Make sure the o-ring stays located within the groove. The
connector will need to be removed from the pilot valve. Once the plug has been removed, feed the
wire assembly into the hole in the valve body to the point where the connector just enters the valve
body. Reinstall the top cover and loosely reinstall the bolts. The connector will eventually need to be
reconnected.
Step #4: Access the Control Module
• Use a 5mm hex-key wrench and remove four M6 x 35mm socket head cap screws & washers
securing the bottom cover on. Lift the bottom cover off, exposing the power generation module.
There is a molded o-ring seal located on the underside of the cap. Make sure the o-ring stays
located within the groove.
• Unplug the connector that connects the power generator to the control board. Use a 5mm hex-key
wrench to loosen the four M6 x 25mm socket head cap screws. The power generation module
should now be loose. Carefully lift the power generation module off the rest of the assembly, making
sure that the control board wire and connector slips through the hole in the power generation case.
• "AirVantage CAUTION" - Take caution not to lose the o-ring seals between the components.
• If the control module needs to be replaced, use a 5mm hex-key wrench to loosen the four M6 x
25mm socket head cap screws holding the control module to the poppet assembly. The control
module should now be loose. Carefully lift the control module off the poppet assembly, making sure
that the pilot valve connector wire slips through the hole in the poppet valve assembly.
• "AirVantage CAUTION" - Take caution not to loosen the o-ring that seals between the
components.
Note: Ensure all mating faces are free from scores or damage prior to re-assembly.
Check each metallic face joint with a 0.003” feeler gage to ensure all flange
faces are fully closed after assembly. Failure to do so may compromise the
flameproof design of the assembly.
Step #5: Reinstalling
• When reinstalling the new control module, make sure to feed the pilot valve connector wire through the
hole in the poppet valve assembly. Install the four M6 x 25mm socket head cap screws and tighten to 30
in-lbs.
• Reinstall the power generation module. Make sure to feed the control module wire through the hole in the
power generation case. Install the four M6 x 25mm socket head cap screws and tighten to 60 in-lbs.
• “AirVantage CAUTION” – Be sure to reattach the connector from the power generator to the
control board.
• Reinstall the top cover, making sure the o-ring seal is still in the groove. Tighten the four M6 screws.
Reinstall the AirVantage using the four 5/16-18 x 5 cap screws and torque to
90 in-lbs.
• “AirVantage CAUTION” – Be sure to reattach the patch cable connector that connects the
AirVantage module to the intermediate.
Note: Refer to AirVantage
Composite Repair Parts List on page
23 for part numbers
Do not open when an
explosive atmosphere
may be present.
WARNING
Substitution of
components may
impair intrinsic safety.
WARNING