Owner`s manual

Dive Rite

Ch. 6 Pg. 8

Removing the ADV from the counter-lung is the reverse of connecting it. The ADV ring should

be loosened a few turns at a time and then gently lifting the ADV away from the fitting. Repeat

as necessary.

ADV Adjustment

To adjust the cracking effort on the Optima ADV, the swivel cap must be removed to access the

adjustable orifice by using a 5/32" Allen wrench. Next, insert a 3/16" Allen wrench through the

swivel and into the adjustable orifice.

ADV adjustments should be made in small 1/4 turn increments. Turning the orifice clockwise

increases cracking effort, while counter clockwise reduces the cracking effort. After each

adjustment the results should be checked by reinstalling the swivel cap and gas supply and then

purging the ADV to check the setting. Repeat these steps as necessary.

Warning!!

The ADV must have a gas cut-off valve fitted for safe operation. The

ADV operates in the same manner as a normal second stage and is a

down-stream valve. Without a gas cut-off valve the ADV might operate

as an over pressure relief valve and quickly fill the counter-lungs with

diluent endangering the diver!

T-Piece

The screw on fitting is BLACK signifying the exhalation side of the

loop. Examine the two o-rings on the counter-lung fitting for debris

and damage. Inspect the surface of the t-piece that will seal to the

counter-lung fitting for debris and lubrication. The T-Piece mounts to

the exhalation counter-lung by pressing it onto the counter-lung

connector as far as possible and turning the ring clockwise several

times, and repeating the process until the T-Piece is fully seated. DO NOT try and tighten the ring

by more than a few turns each time, otherwise it may be impossible to fully seat the T-Piece.

Removing the T-Piece from the counter-lung is the reverse of connecting it with one important

difference: The ring that secures the counter-lung fitting in place should be held when

loosening the T-Piece ring. Failure to hold this ring may loosen the counter-lung connector

instead of loosening the T-Piece ring since BOTH rings tighten and loosen in the same direction.

Loosening the counter-lung connection will cause leaks until the connector is correctly tightened.

The T-Piece ring should be loosened a few tuns at a time then gently lifting the T-Piece away from

the fitting. Repeat as necessary.