MOLEAER BLOOM 1.5
NANOBUBBLE GENERATOR
Operation and Maintenance Instructions
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2. Apply soapy water to gas fittings and connectors to
ensure there are no gas leaks. If leaks are
detected, then tighten fittings and / or connectors.
3. Gas flow rates can be adjusted depending on
application and desired effect. The Bloom
generators are designed to deliver a spectrum of
nano and / or micro bubbles to meet the
requirements of the process or application. Low
gas flow rates produce more nanobubbles and
have a higher gas transfer efficiency, whereas
higher gas flow rates produce both nano and
microbubbles that have a lower gas transfer
efficiency, but higher mass transfer rate. Refer to
the specification table for suggested gas flow rates
for the different size units.
Gas Pressure Switch and Low Pressure
Warning Light
This product is equipped with a pressure switch located
outside of the automatic gas inlet valve.
1. The default setpoint for the supply gas pressure
switch is 40 PSI (2.75 BAR).
2. If the supply gas pressure drops below the setpoint,
the red Low Gas Pressure Warning Light will turn
on and the automatic gas inlet valve will close. The
unit will continue to inject oxygen for as long as gas
pressure exceeds pump discharge pressure.
3. The maximum supply pressure is 120 PSI (8.3
BAR).
NOTE: Operating the system with lower than the
recommended supply pressure may impact the ability
to provide the optimal gas flow rate and will result in
less than optimal performance.
4. The gas pressure switch setpoint can be changed
to expand or restrict the operating range of the
Bloom generator.
5. Gas pressure and pump discharge pressure can be
checked using the gauges on the front of the
Bloom.
To change the supply gas pressure switch setpoint:
1. Rotate the locking ring on the top of the pressure
switch clockwise, until the “UNLOCK” symbol lines
up with the setting marks.
2. Rotate the SET and RESET dials to the desired
setpoint.
NOTE: It is recommended to keep the SET and
RESET dials at the same pressure.
3. Rotate the locking ring on the top of the pressure
switch counterclockwise, until the “LOCK” symbol
lines up with the setting marks.
System Operation
Pump must be fully primed before initial operation.
The pump is capable of self-
sufficient water in the pump strainer basket.
Operation at or near zero flow can cause extreme
heat, personal injury, or property damage.
1. Open the intake and discharge valves to flood
piping and prime the pump. Pump is primed by
removing the strainer lid, filling the strainer
basket with water, and replacing the strainer lid
before starting. It will take a few minutes for the
pump to reach full flow and the strainer basket
is full, as can be seen through the lid.
NOTE: If the Bloom generator is located above the
water line of the tank or water body, it is important to
install a check valve just above the intake screen.
Leaks in suction piping may only be visible while
pump is off and piping is flooded. Leaks in suction
piping may draw air into the system and impact
performance.
2. Turn green selector switch to “ON” and run pump
at normal operating conditions and check the
piping for visible leaks. If necessary, adjust the pipe
supports.
NOTE: Normal operating pressure range on the pump
is between 13 PSIG and 25 PSIG (0.9 BAR to 1.7
BAR). Pump flow rates should be +/- 10% of the
system’s designed flow. Pump flow rates lower than the
system specifications will result in larger bubbles and
lower oxygen transfer efficiencies – it is NOT
recommended.
