Teledyne API M751H High Performance Zero Air Generator MAINTENANCE
07773A DCN6833 37
5.10 Changing the Regenerative Dryer’s 4-Way Valve
1. Remove the Regenerative Dryer from the chassis as described in Section 5.9
above.
2. Disconnect the two tubing connections and the electrical connection to th e 4-way
valve.
3. Remove the 4-way valve bracket from the regenerative upper manifold.
4. Remove the 4-way valve from the bracket.
5. Attach a new valve, complete with tube fittings and muffler(s).
6. Attach the bracket to the upper manifold.
7. Connect the electric cable and two pneumatic fittings.
8. Re-install the dryer in the 751H chassis and tighten the four captive base screws.
5.11 Leak Check
.
WARNING
ENSURE TO UNPLUG THE POWER CORD PRIOR TO
PERFORMING ANY LEAK CHECK PROCEDURE
1. Power off the unit and unplug the power cord.
2. Cap the zero out fitting and the drain port fitting.
3. Disconnect the line to the dewpoint sensor manifold an d cap it.
4. Plug in the power cord, power on the unit, and allow it to run for on e minute (until
it’s pressurized).
5. Turn off the power switch and wait five minutes. The rea ding on the instrument
panel pressure gauge should not change.
NOTE
This procedure checks the majority of the components and fittings. If you
believe that there is still a leak, please contact Technical Support:
(858) 657-9800.