SANDPIPER RHDF2 Hazardous Duty - Manual (Page 28)

rhdf2dl1sm_haz duty-rev0614 Model RHDF2 Hazardous Duty Page 26
Note: Refer to AirVantage
Composite Repair Parts List on page
23 for part numbers
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 be removed only from the intermediate.
Step #2: Remove the AirVantage from the Pump
• Use a ½” socket and remove the four 5/16-18 x 5 ½ 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 4mm hex-key wrench and loosen the four M5 x 16mm socket head cap screws
• 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 4mm hex-key wrench and loosen the four M5 x 16mm socket head cap screws
• 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 4mm hex-key
wrench to loosen the four M5 x 16mm 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 that seals between the
components.
• If the control module needs to be replaced, use a 4mm hex-key wrench and loosen the four M5
x 30mm 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.
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 M5 x 30mm socket head cap screws and tighten to 3.4
N-M.
• Reinstall the power generation module. Make sure to feed the control module wire through the hole in the
power generation case. Install the four M5 x 25mm socket head cap screws and tighten to 6.8 N-M.
• “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 M5 screws.
Reinstall the AirVantage using the four 5/16-18 x 5 ½ 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.
CAPSCREW, HEX SOC HD
M5 x 0.8 x 16
COVER
CAPSCREW, HEX SOC HD,
M5 x 0.8 x 25
SEAL, O-RING
CONNECTOR (Power
Generation Module to
Control Module)
POWER GENERATION MODULE
CONNECTOR
(To Intermediate)
Connector (Control Module
to Power Generation Module)
CONTROL MODULE
VALVE, POPPET
SEAL, O-RING
SEAL, O-RING
SEAL, O-RING