KiSS ORCA SPIRIT, Manual

Page: 40 / 124

40 MSL 72.161 Jetsam/Orca Spirit manual R.5
Adjus ng the O2 Flow Rate
The oxygen injec on rate can be adjusted to suit each individual diver. The required flow rate depends on the physical
size of the diver and the degree of exer on used during the dive. If the flow rate is too high the PP02 will climb to dan‐
gerous levels and the breathing loop will have to be purged to reduce the oxygen par al pressure to a safe level. If the
flow rate is set too low oxygen will have to be manually added more o en during the dive.
TOO LOW IS BETTER AS IT IS QUICKER TO ADD OXYGEN TO
THE LOOP, THEN TO FLUSH IT!!
To adjust the flow rate, disconnect the oxygen delivery line where it a aches
to the stainless steel elbow on the side of the scrubber head. A ach a 0‐1
litre per minute flow meter (Dwyer VFB‐60‐SSV or equivalent) to this line.
Disconnect the manual add valve supply line where it a aches to the add
valve filter and connect a 0‐300 psi
gauge between these fi ngs.
Remove the clamp ring from the oxy‐
gen regulator, (A) and li the black
plas c plug, (B) out of the regulator
cap. Connect the regulator to an oxy‐
gen cylinder which has at least 800 psi
remaining. Slowly (oxygen, remember)
open the oxygen valve. Note the gauge
pressure and flow meter reading. The
rela onship between the pressure se ng and the O2 flow rate should match the table on the following page.
For those of you using the Miflex hoses. The following photos show how the flow system can be checked and which
parts you need. All parts can be purchased through one of your local fi ngs suppliers. This is just one method that
can be used.
First, remove the Miflex hose from the filter and a ach an IP gauge. Determine where the IP is set, before you make
any changes. A er you record that informa on, rea ach the hose. Then remove the miflex hose which is a ached to
the plug side of the valve. A ach your flow meter and short LP hose (see above photo). As per the instruc ons on the
next page, adjust your flow. Once you have adjusted the flow, you can remove the flow meter and hose, and rea ach
the IP gauge. This will allow you to verify your flow reading with the IP of the first stage, using the chart on the next
page.
NOTE: IT IS VERY IMPORTANT THAT TWO WRENCH’S ARE USED WHEN REMOVING HOSES
OR FITTINGS FROM THE MANUAL ADD VALVE!!! ONE MUST BE USED TO ENSURE THAT THE
FITTING ON THE VALVE DOES NOT SPIN!! SEE THE PHOTOS AT THE TOP OF THE PREVIOUS
PAGE WHICH SHOW HOW TO DO THIS PROPERLY.
A
B