General Maintenance
The A3S pump requires very little maintenance. However, the pump and all accessories should be checked weekly to ensure proper pump performance. This is especially important when pumping chemicals that may be extra corrosive. Inspect all components for signs of unusual wear, clogging, leaking, swelling, cracking, discoloration, or corrosion. Ensure rollers are moving freely and not straining or excessively wearing tubes. Replace worn or damaged components immediately.
Replacing Tubes and Rollers
The A3S pump is equipped with a Tube Failure Detection (TFD) that will sense a tube leak and stop the pump. This feature will prevent the pump from running when there is a tube leak.
When a tube leak occurs, or a tube needs to be replaced as part of periodic maintenance, the pump tube will need to be removed and a new tube will need to be installed. This process is quick and should not take more than a few minutes. Follow the steps below or watch the video at the bottom of this section.
- Relieve system pressure. Disconnect the system plumbing from the pump tube adapters.
- Press the Start/Stop key to stop the pump.
- Remove the four black thumb screws from the front of the pump head cover by unscrewing them counterclockwise.
- Remove the pump head cover by pulling it straight out.
- Once the font cover is removed, the pump will go into “Maintenance Mode”. In “Maintenance Mode” the pump will run at 6 rpm only.
- Press the Start/Stop key to start the pump.
- With the pump running, pull the inlet (suction) fitting out of the pump head. Guide the tube counterclockwise away from the rollers. Pull the outlet (discharge)fitting out of the pump head.
- Press the Start/Stop key to stop the pump.
- Thoroughly clean the pump head and rotor. The rotor can be removed by pulling it straight out. After cleaning, push the rotor back on the shaft.
- Press the Start/Stop key to start the pump.
- Insert the inlet (suction) side of the pump tube fitting into the lower retaining slot of the pump head. Carefully guide the pump tube into the pump head.
- Stretch the tube slightly and insert the outlet (discharge) fitting into the upper retaining slot of the pump head.
- Pull the outlet fitting out of the pump head.
- Place the clear cover onto the pump head. Secure the cover with the provided three thumb screws.
- The pump screen will ask if the tube has been replaced. Answer “Yes”. Check the next screen to verify the tubing information. (If you have switched to a different style tube, you will want to change the tube information on this screen. Press “Save.” The pump is now ready for operation.
For more information on pump maintenance and tube replacement, please watch the below video, or refer to the product manual.
A3S Tube Replacement and Maintenance Video
FAQs
Frequently Asked Questions
A3S Maintenance
- How do I extend and increase tube life hours?
Three factors determine tube life, chemical compatibly, motor speed & injection point pressure. Operating the pump at the lowest motor speed and pressure will generally result in longest tube life possible. Once chemical compatibly is confirmed, factory is happy to provide estimate tube life hours based on motor speed and pressure condition. Tip. A worn or dirty roller assembly will result in decreased tube life hours.
How many years can I expect my pump to last?The A3, A4, M3, and M4 model chemical metering pumps are designed for many years of service. The motors and electronic circuitry have a design life expectancy of a minimum of 10 years when properly installed and maintained. These pumps are fully repairable and serviceable. Depending on the model number, the pumps are warranted for a minimum of 2 years and up to 5 years. It is not uncommon for these pump to last up to 25 years with proper care and maintenance.
