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REFILL MANUAL FOR 3M™ NOVEC™ 1230 FIRE PROTECTION FLUID
Revision E
Document # DOC181
Issued: May 31, 2011
Revised: June 23, 2020
Section 4 Fill Procedure
4.2.1 Seating Cylinder Valve
e piston inside the cylinder valve must be seated using nitrogen before proceeding to ensure agent does
not escape from the open cylinder valve.
• After ensuring that the valve set line ball valve and cylinder pressurization line ball valve of the nitrogen
regulator/hose assembly are closed, connect the regulator CGA fitting to the nitrogen supply valve.
• Open the nitrogen supply valve and set the regulator to no higher than 100 psig at 70°F.
• Install the valve closing adapter hand tight to the valve actuation connection located on the top of the
cylinder valve.
• Connect the valve closing line of the nitrogen regulator/hose assembly to the valve closing adapter.
• Open the ball valve of the valve closing line for no more than 1 or 2 seconds and then close the ball
valve. A slight popping noise should be heard as the piston of the cylinder valve is seated, closing the
cylinder valve.
• Set the nitrogen regulator to 0 psi. Pressure within the valve closing line will be relieved through the
regulator. Close the nitrogen supply valve on top of the nitrogen supply cylinder.
It must be verified that the cylinder valve piston has fully seated before any of the fill components are
disconnected. Pressure must also be depleted from within the cylinder fill assembly before disconnecting
the cylinder fill hose. e following method shall be used to achieve both tasks.
• Set the direction of flow for the fill station towards the agent supply tank. Do this by setting the pump
selector knob to "recovery cylinder".
• Open the manual agent fill valve and set the fill station pump to a low speed using the pump control
knob. If a pressure drop is not immediately observable on the fill pressure gauge, the cylinder valve
piston has not fully seated. Close the manual agent fill valve and repeat the process for seating the
cylinder valve piston using nitrogen.
• Once a pressure drop has been observed on the fill pressure gauge, continue pumping until the pressure
gauge indicates 0 psig. Close the manual agent fill valve, turn off the pump by setting the pump control
knob to off, and set the pump selector knob to the neutral or off position.
4.2.2 Cylinder Weighing
To determine the exact amount of agent that has been pumped into the cylinder assembly, all fill component
hardware must be disconnected from the cylinder assembly and the cylinder assembly must be weighed a
second time.
• Remove the valve closing line from the valve closing adapter. If the valve closing line quick-connect
fitting is difficult to remove, this indicates the valve closing line is still under pressure. Ensure the ball
valve on the cylinder pressurization line and nitrogen supply valve on top of the nitrogen supply valve
are closed. Set the nitrogen regulator to 0 psi and then open the valve closing line ball valve. Pressure
will bleed out of the self-relieving nitrogen regulator. Once pressure has been bled to 0 psi, close the
valve closing line ball valve and remove the valve closing line from the valve closing adapter.
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