Polaris PB4SQ Installation And Operation Manual page 14

Page 14
ENGLISH
Air leaks are still present.
There is no air in the system,
but the pressure is still low.
There is no debris blocking the
impeller and the pressure is still
low.
The pump is leaking water
between the motor and pump
body.
The pump gets hot and shuts
off periodically.
Polaris® PB4SQ™ Booster Pump | Installation and Operation Manual
Check the suction side piping union. While the pump is running, try to tighten the
union. If this does not stop the air leak, turn off the pump. Loosen both unions and
slide the pump out of the way. Remove, clean and re-install both union o-rings on
the filtration pump.
Reposition the pump next to the piping and secure the union nuts to the pump.
With clean union o-rings, hand-tightening of the unions should create a seal. If
the unions still do not seal, gently tighten with a large pair of tongue-and-groove
pliers.
Do not over-tighten using a tool. Doing so will compromise the unions.
It is possible that debris is caught in the pump impeller. The pump impeller moves
the water, and the vanes in the impeller can become blocked with debris.
The pump impeller is showing signs of normal wear. Have a qualified service
technician check the impeller and replace as necessary.
Make sure that the first stage O ring is properly installed and is not pinched or
damaged.
If the pump is part of a relatively new installation, it could be an electrical problem.
Contact a qualified service technician. Have the technician check for loose
electrical connections and check the voltage at the pump motor while it is in
operation. The voltage must be within 10% of the motor's data plate rating. If the
voltage is not within 10%, contact a qualified electrician and/or the local power
service provider.
Pump seal is leaking air. Have a qualified service technician replace the seal.
This is caused by a damaged or failed mechanical seal. Replace the seal.
Ensure that there is adequate room around the motor to circulate air and keep the
motor cool. Have a qualified electrician check for loose connections and check the
voltage at the pump motor while it is in operation. The voltage must be within 10%
of the motor's data plate rating. If the voltage is not within 10%, contact a qualified
electrician and/or the local power service provider.