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SuperLite
®
17B
© ⅯⅯⅩⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 120613005
95
7.8.12 Regulator Steady Flows When
Pressured Up
1) Ensure supply pressure is adjusted between 135-150
p.s.i.g. (9.3-10.3bar).
2) Adjust demand regulator bias adjustment knob
clockwise (in) until the free flow stops.
NOTE: If demand regulator bias adjustment knob
is turned fully “in” and gas continues to flow, the
demand regulator requires adjustment.
3) Recheck lever play at the purge button ensuring
1/16 inch (1.5 mm) to l/8 inch (3.0 mm) of free travel
before the purge button comes in contact with the
diaphragm actuating a slight flow of gas. If a slight
flow of gas develops with the purge button depressed
less than 1/16 inch (1.5 mm) or greater than 1/8 inch
(3.0 mm) the lever will require adjusting.
7.8.13 Regulator has Low or No Flow When
Pressurized
Tools Required:
Regulator Adjustment Tools, (Part #525-620)
1/4 inch Flat Blade Attachment on Torque Screwdriver
NOTE: If there is low or no flow when the regulator
is pressurized, and the lever is very loose (travels
more than 1/8 inch at the roller end), the nut must
be tightened.
1) Adjust demand regulator bias adjustment knob “in”,
i.e., clockwise.
2) Ensure supply pressure is adjusted between 135-150
p.s.i.g. (9.3-10.3bar).
3) Back the demand regulator bias adjustment knob
out counterclockwise until a slight steady flow de
-
velops. Then adjust the knob in clockwise until the
free-flow just stops. Depress the lever several times
to ensure the regulator is stabilized.
4) Recheck the lever play at the purge button ensuring
1/16 inch (1.5 mm) to l/8 inch (3.0 mm) of free travel
before the purge button (123d) comes in contact with
the diaphragm actuating a slight flow of gas. If a slight
flow of gas develops with the purge button depressed
less than 1/16 inch (1.5 mm), the lever will require
slightly more play.
If the purge button travels greater than 1/8 inch (3.0
mm), the lever will require a reduction of play by
adjusting.
5) Recheck that gas source pressure is set between
135-150 p.s.i.g. Gas source must be capable of sup
-
plying 4.5 a.c.f.m. (127.4 BL/min per diver) at the re
-
quired over bottom pressures for the depth of the dive.
6) If the preceding steps were satisfactory, check the
following helmet/mask parts for foreign debris in the
air/gas passages:
a. One-way valve
b. Side block assembly
1. Defogger valve
2. Emergency Valve Assembly
3. Bent Tube Assembly
7.8.14 Unexplained Demand Regulator Free
Flow
Any leak in the neck dam when the diver is face down
will cause gas to vent out into the water from the inside
of the helmet. This causes the demand regulator to steady
flow, making up for the vented gas. Even if the adjustment
knob is turned in, the leak may continue.
1) One method to check for this is for the diver to place
the demand regulator above the neck dam by looking up.
Free flow from a leaky neck dam should cease as long
as the helmet is in the upright position.
2) Ensure the demand regulator bias adjustment knob
(120) is properly adjusted for the supply pressure.
3) During ascent the regulator will free flow if the supply
pressure to the helmet is not backed off (topside) or, the
diver does not adjust “in” (clockwise), the demand regula
-
tor adjustment knob as the diver’s depth and the ambient
pressure decreases.
4) If the preceding steps were checked and the demand
regulator still steady flows the regulator requires adjust
-
ment.