AAON LC-054 - Manual (Page 33)

33
Noise Levels
Estimated Pumping Unit Sound Power Level, (Decibels), A-Weighted, at 1 m (3 ft.) from unit.
Vibration Levels
Vertical In-Line pumps are designed to meet vibration levels set by Hydraulic Institute Standard
HI Pump Vibration 9.6.4. Standard levels are as detailed below:
Dual Pump Specific Information
Dual Pump Flapper Valve Operating
Instructions
This unit is fitted with internal valves to
allow isolation of one pump for service and
to automatically prevent recirculation of the
flow when only one pump is running.
Procedure for Parallel or Stand-By
Pumping:
Discharge and suction valve stems should be
locked in the center position. This is
indicated by both locking handles in the
vertical position and the center pin of the
locking arms (4) locked by the handles. This
procedure allows the discharge flapper
valves to pivot freely and locks the suction
valve firmly in the center position.
Procedure for Isolation of One Side:
1. Stop the pump to be serviced.
2. Close and lock the suction and discharge
valves: as per instructions below.
3. Ensure seal flush line interconnection
valve is closed and drain the isolated casing.
4. Service isolated pump as required.