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Section 3 Operation
Installation and Operation Manual
X-VAP-VDM100-eng
Part Number: 541B178AAG
December, 2012
®
Brooks
VDM100 Vapor Delivery Module
4. The user needs to ground Pin 14 of the DB-15 to start the Drain mode.
When the Drain mode is started the following takes place:
a. The water inlet valve will open for 1 minute to allow nitrogen into the water
tank. This will pressurize the tank to the pressure level of the nitrogen
supply (10-40 psig as required for proper operation).
b. The drain valve will then open allowing the water to be pushed out of the
tank. When the tank is drained a short amount of time will be allowed to
keep pushing nitrogen through the tank. This helps to insure that as much
water is drained from the tank as possible.
c. When the process is complete in 5 to 7 minutes (typical), the green
"READY" LED will blink, Pin 13 of the DB-15 will oscillate at 1Hz, and both
water valves will be closed.
5. When the green "READY" LED blinks and Pin 13 of the DB-15 oscillates
at 1 Hz, the user needs to let Pin 14 of the DB-15 float (remove ground) to
end the Drain mode.
As stated above, the Drain mode process typically takes 5 to 7 minutes.
This is dependant on the nitrogen supply pressure and the amount of water
in the tank when the Drain mode is initiated.
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