Aqua Lung SEA MK Troubleshooting Guide download pdf (Page 18)

SEA LV2 Technical Maintenance Manual

Filling the SEA with the MRS III Mobile

Rell Station

The MRS III is a self-contained Mobile Rell Station with an

onboard supply of approved breathing air pressurized up to 4500

psi. The MRS III is designed to ll up to two (2) Aqua Lung SEA

(Survival Egress Air) units simultaneously to the operating pres-

sure of 3000 psi. The following instructions are the same for lling

one unit or two.

1. Verify that both panel mounted ll valves on the MRS III

are closed (clockwise).

2. Open the valves on the MRS III supply cylinders and

verify that the SUPPLY Pressure Gauge on the panel reads

between 3000 and 4500 psi.

3. Verify that the REGULATED Pressure Gauge on the

MRS III panel reads 3000 psi.

4. Remove the ll port plug from the SEA unit and store the

plug in the mounted retainer located on each MRS III. Verify

that the SEA ll port is clean and dry, and place the SEA in

the blast tube.

5. Install the MRS III ll hose connector into the SEA ll port

by rotating the knob clockwise until the o-ring is fully seated.

DO NOT USE A WRENCH OR PLIERS TO TIGHTEN. If the

tting leaks during lling, the connector threads and o-ring

must be inspected for damage. Replace the damaged parts

as needed.

6. Slowly open the MRS III panel mounted ll valve (coun-

terclockwise) that corresponds to the ll hose being used.

There is no need to open any valve on the SEA unit.

7. Slowly ll the SEA at a rate not to exceed 500 psi per

minute, to the maximum of 3000 psi.

NOTE: If the SEA cylinder becomes excessively

warm to the touch while lling, allow additional lling

time for the unit to cool before removing the SEA unit.

8. When the SEA has cooled and is full, close the MRS III

panel mounted ll valve.

9. Open the bleeder valve knob on the MRS III ll hose con-

nector and vent the pressure from the ll hose.

10. Verify that the small pressure indicator on the SEA indi-

cates zero pressure.

11. Disconnect the MRS III ll hose connector from the SEA

by rotating the connector knob counterclockwise.

12. Replace the port plug into the ll port of the SEA unit and

hand tighten.

13. When all lling operations are complete, close the valves

on the MRS III supply cylinders. Firmly grasp one of the MRS

III ll hose connectors, point in a safe direction, and bleed

any remaining pressure from the system by slowly opening

the corresponding panel mounted ll valve for that hose.

14. Close both panel mounted ll valves and both bleeder

valve knobs on the MRS III.

15. Attach the ll connectors to the provided mounting brack-

ets, close and securely latch the MRS III cover.

Second Stage Reassembly

1. Install a new, unlubricated exhaust valve (64) by insert-

ing the stem of the exhaust valve through the center hole of

the exhaust port. Pull the stem all the way through until the

mushroom plug pops through the hole and keeps the valve

securely in place. Examine the ap of the exhaust valve

to make sure it is laying at and is not distorted or folded

under. Using a pair of small wire cutters, snip the stem of the

exhaust valve so it is only about 1/4" long.

2. Using your ngers, screw the exhaust cover (65) onto the

box bottom (63) until hand tight.

3. Press a new LP seat (51) into the end of the poppet (50)

until it is ush and seated evenly. Ensure the dimpled side is

toward the poppet.

4. Place the poppet bearing (48), rounded side rst, onto the

stem of the poppet (50). Using the poppet as an installation

tool, insert the bearing into the barrel of the valve body (47).

Align the squared side of the poppet bearing with the square

hole in the valve body and press it into place. Remove the

poppet.

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Aqua Lung SEA MK Troubleshooting Guide Page 18

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