| What is the maximum tank pressure? | The maximum tank pressure is 350 psig which is the point in which the main safety on tank will relieve. A bleeder valve is installed on the tank to begin relieving pressure at 325 psig and fully open at 330 psig. |
| Should I replace the main safety relief valve? | The safety relief valve should be recertified or replaced every 5 years. |
| How do I know how much liquid is in the tank? | Most of our tanks have a differential pressure reading level gauge. The typical gauge has two scales, inner and outer. The inner scale x 1000 indicates how much liquid is in the tank. |
| Is it normal to see ice spots on the tank? | Ice spots on the head or the shell of the tank would indicate poor insulation underneath the sheet metal. Ice spots at the end and on the sensors located on the top of the pressure build vaporizer are considered normal. |
| When should the refrigeration unit be operating? | The refrigeration unit will energize at 305 psig and shut off when the pressure is reduced to 295 psig. |
| What if the refrigeration unit is cycling frequently? | If the refrigeration unit is cycling on an off frequently, this could indicate a leak of refrigerant in the system. A carbon dioxide technician should service the unit. |
| What if the refrigeration unit continues to run and the tank pressure is above 305 psig? | This could indicate there is a faulty TXV or possibly air in the tank which is non-condensable. A carbon dioxide technician should service the unit. |
| When should the pressure build vaporizer be operating? | The vaporizer will energize at 245 psig and shut off at 255 psig. (These are the typical pressure settings, may vary by a few psig which is not an issue) |
| Should I hear the vaporizer operating? | It is not typical to know when the vaporizer is operating unless the contactor hears a slight humming noise. |
| What should I do if the vaporizer is operating but the pressure in the tank is not increasing? | Check the voltage and amperage to ensure the heating elements are operating correctly. |
| Why is the vaporizer not operating when the tank pressure below 245 psig? | Check the pressure switch settings. |
| What is the normal tank pressure? | The normal tank pressure is between 245 psig and 305 psig. This pressure is determined by the application in which the tank is being used. If vapor is withdrawn from the tank, it will be on the lower end of the range. If the tank is not in use, or liquid is used at low flow rates it could be at the top end of the range. Note: The pressure gauge is the most important indicator on the storage tank. |
| What if the pump is not building pressure to fill the cylinders? | Possibly, the return bypass valve is open not allowing pressure to build. Liquid supply valve not fully opened. Ensure valves are in open position. Pressure regulating valve set to low. Check valves in pump may be worn or damaged. Belts on pump may be slipping or broken. Replace or tighten, as necessary. |
| What do I do if the pump is leaking CO2 around the piston rod? | Tighten the shaft packing or replace. |
| What should I do if the compressor is knocking or making a loud noise? | Check oil level and add, as necessary. Possible damaged bearings in the crankcase. |
