Side channel blower (regenerative blower) installation
For electrical installation, ensure that a qualified electrician does the wiring connections and electrical box, as this requires a full knowledge of single phase, 3-phase and motor connections. Air plumbing may need a qualified plumber for some applications.
Blower installation – general procedure
In relation to this video, many water aeration applications do not use a pressure release valves or gauge as illustrated. This is however the professional and perfect way to install a blower. The blower is cooled by its own airflow, so the volume of air released must be within the range of the blower pressure versus air flow curve. Always try and select a blower that fits in the middle half of the curve in terms of air flow and pressure.
The air intake filter prevents large items like stones, insects or lizards getting sucked in and damaging the impeller. Once the fan impeller is damaged (e.g.broken vane), the unit becomes unbalanced.
If in a highly dusty environment, then a different filter to the standard MF air intake filter is needed. A filter more like a generator or tractor filter needs to be installed. For example in a coal mine, coal tar type grease can collect around the impeller. If the impeller is good, a fine particle filter is not used.
Instead of non-return valves and large bends as in this video, place the blower above the water level. This is to prevent back siphoning of water into the blower when there is a power failure or the blower is switched off. Water flowing into the blower can damage the blower. Non-return valves can fail and leak, so are not the safest solution.
The blower’s delivery line pip diameter selected depends on the size of the blower, the distance to the point of use and is of a diameter to minimise friction losses in the pipe line.
With three-phase blowers the motor can run backwards if the phases are incorrectly wired. Switch the two outside phases to reverse the blower motor run direction. As stated, a qualified electrician should do the installation for the blower warranty to remain valid.