> I have a CO2 emission system with no instructions and I was
> wondering if you had any knowledge that would help me make the most of
> this system.  The regulator appears to be from a fire extinguisher
> recharger.
> The regulator brand name is Harris.  The face of the regulator has #'s 10-60
> and says AR/CO2 and at the bottom of the regulator face it says
> C.F.H.FLOW.  The regulator runs into a Dayton time switch.
> Any help would be greatly appreciated.  Peace. 

One gage would read the tank pressure only (very high psi numbers).

One gage would read psi from a regulator that controls the pressure coming from the tank (and going to the flow control). I believe this to be the "10-60 and says AR/CO2" you mention. I don't know what AR means.

The other would be a gage from the flow control that actually controls the amount of CO2 being released. Flow controls generally read in cubic feet (or liters) per hour (or minute), in your case the "C.F.H.FLOW" means cubic feet per hour. This would be calculated against the cubic footage of your room. Since flow controls work with lower pressures coming from the pressure regulator (in your case 10-60psi) that is usually where the solenoid connected to the timer is located (never hook the solenoid directly to the high pressures found in the tank).

The range of the flow control adjustment may be dependent on the psi setting of the pressure regulator. So if you can't get an adequate CO2 release for the timer you use, you may have to decrease psi. I'm hesitant to give info of this type because of the pressures approaching 1,000psi used in the CO2 tank. Pressures of that degree can be VERY dangerous if used with the wrong regulators, fittings, etc. (not to say yours are wrong). An explosion could take your head off, please keep that in mind. You may want to contact Harris for info, see if they got a web site. You never want to release CO2 directly from the tank, always use a proper regulator for CO2. Keep the tank upright during use, and use a small length of chain to keep it from falling over. I believe every 5 years tanks must be pressure tested for safety, the date is usually stamped on the tank.