AAON BL-600 - Manual (Page 27)

27
Capacity
Maintenance Instructions
To clean strainer remove the bottom plug
and pull out strainer.
Adjustment
To adjust pressure setting, loosen the lock
nut and turn the adjusting bolt clockwise to
increase pressure, counter clockwise to
decrease pressure.
Note: Use a pressure gauge downstream to
adjust and verify the pressure setting.
Troubleshooting
High System Pressure
If the downstream system pressure is higher
than the set pressure under no flow
conditions, the cause could be thermal
expansion, pressure creep or dirt/debris on
the
seat. Thermal expansion occurs
whenever water is heated in a closed system.
The system is closed when supply pressure
exceeds 150 psi, or a check valve or
backflow preventer is installed in the supply
piping. To determine if this is the result of
thermal expansion, try briefly opening the
cold water tap. If the increased pressure is
caused by thermal expansion, the pressure
will immediately be relieved and the system
will return to the set pressure.
Dimensions-Weights: