Dosing CO:
1) Check tubes are securely connected
2) Check for secondary CO detectors (at least 2) and test batteries to ensure they are working
3) Check that the tank valve (the valve directly on top of the tank), the adjustment valve (the large blue cylindrical valve on the regulator) and the outlet valve (small blue valve on the tank regulator) are closed.
4) Check where the pump will vent: hood (VT/LT) or pumping cabinet with tube into exhaust (TPD)
5) Turn on the pump
6) Leak check lines to ensure they hold vacuum
7) Have a second person trained in CO dosing check everything and be present during the line changing.
NOTE: If you need to follow this list you should not be dosing CO alone.
Preparing for Dosing
8) Open the pump-butterfly valve (blue valve connecting the pump to the other lines) and the dose-butterfly valve (blue valve connecting the dosing line to the other lines) allowing the vacuum to enter all the lines.
9) Then open the black valve (the black valve on the line before the leak valve).
10) Open the outlet valve and make sure the pressure on the first regulator gauge (the left gauge on the regulator) decreases to less than 0, this is further proof of a vacuum.
11) Close the outlet valve and close the pump-butterfly valve
12) While everything else is closed, open the tank valve. Keep it open until the second regulator gauge (the right gauge on the regulatory) reads 600 psi - this is all the CO that you will let out of the tank.
13) Once at 600 psi, close the tank valve and don’t touch it again for the remainder of the dosing process.
14) Open the outlet valve and fill the line to 5 psi using the adjustment valve. Close the adjustment valve immediately after you reach 5 psi.
15) Close the outlet valve then open the pump-butterfly valve to pump out the CO. Give the pump a few seconds to evacuate the line and then close the pump-butterfly valve.
16) Repeat steps 14 and 15 two more times. Essentially, these steps allow 5 psi of CO into the line then pump it away to flush foreign gases out of the lines.
NOTE: After three flushes, check that the tank, adjustment, outlet, and pump-butterfly valves are all closed and the black and dose-butterfly valves are the only ones open.
17) Open the outlet valve and use the adjustment valve to fill the line to 5 psi. Close the adjustment and the outlet valve.
18) After this, close the black valve. This traps CO between the black valve and the leak valve, this trapped CO is the CO that will be used to dose.
Getting Rid of Left over CO in the Lines *Never store CO in the lines
19) Open the pump-butterfly valve and evacuate the line.
20) Double check that the tank valve is closed.
21) Open up the outlet valve and slowly open the adjustment valve to evacuate the regulator of CO, never let pressure on the line get above 5 psi. The CO in the regulator is what remains of the 600 psi from the start, therefore only open the adjustment valve a little and go slow. By the end open the adjustment valve all the way to ensure all the CO has been pumped away.
22) Once the regulator is empty, close the adjustment valve, the outlet valve, the dose-butterfly valve and the pump butterfly valve in that order (this preserves the vacuum).
23) Wait about one minute and then turn off the pump/hood
24) Remember to pump the CO between the black and leak valves out once you are done dosing for the day. To do this turn the pump back on, open the pump-butterfly, the dose-butterfly and the black valve in that order. Once finished, close everything starting with the black valve, then the dose-butterfly valve and then the pump butterfly valve. Wait one minute and then turn the pump off.