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AIM-OM-ATX-3, Rev. 2.1, 05/15
• Copyright Orenco Systems
®
, Inc. Property of Orenco Systems
®
, Inc. Do not reproduce or distribute without written authorization from Orenco: 800-348-9843.
AdvanTex
®
O
&
M
MANUAL
C O M M E R C I A L T R E A T M E N T S Y S T E M S
2.
Drawdown test:
Perform a drawdown test to set the pump flow
rate in the control panel.
a. Measure and record the distance from the top of the tank to the
liquid level in the tank.
b. Toggle the pump “AUTO-OFF-MAN” switch to the “MAN” position
for sixty seconds.
c. Toggle the pump “AUTO-OFF-MAN” switch to the “OFF” position;
then measure and compare the difference in elevations. The
difference in elevation in inches or millimeters, multiplied by the
gallons per inch or liters per millimeter of the tank or basin will
provide the correct flow rate in gallons per minute (gpm) or liters
per minute (L/min). Follow the instructions provided with the control
panel for entering the measured pump flow rate.
NOTE:
This method will not work on recirculation/blend tanks if
the flow is returning to the tank through the recirc valve or for
dose tanks with transport lines that drain back.
3.
Automatic pump operation:
Test the system using the floats to
drive pump operation.
• Demand dose:
a. Toggle the “AUTO-OFF-MAN” switch to the “AUTO” position.
b. Unclip the float assembly and remove it from the tank if it is not
out already.
c. Verify the automatic operation of the pumps by incrementally
lifting the floats to simulate normal raising and lowering of the
tank liquid level. The pumps should cycle on when you lift them
and cycle off when you release them. On duplex systems, the
pumps should alternate between lead and lag pumps and cycle
off when the floats are dropped.
NOTE:
An “On/Off” float works differently than a pair of “On” and
“Off” floats. Verify the type of floats in your system before testing.
d. Lower the float assembly into the tank and clip the float
assembly into the float bracket.
• Timed dose:
a. Toggle the “AUTO-OFF-MAN” switch to the “AUTO” position.
b. Record the timer settings, then reduce the timer settings to 0.5
minutes “OFF,” 0.5 minutes “ON,” and 1.0 minutes “OVR OFF.”
c. Let the pump run through several cycles to confirm that the
timers are operating correctly.
d. Change the timer settings back to the settings specified by the
engineer.
Inspection Points –
System Timer Settings
1.
Recirc Timer Settings:
The method for calculating Recirculation/
Blend Tank timer settings is provided below. Newer AX100 panels
have the ability to adjust the timer setting based on actual flow
data. See the instructions included with the control panel for setting
information.
• Pump On Time = 1.5 Minutes
NOTE:
The standard Pump On Time for AX100 units is 1.5
minutes. Your system’s needs may differ. Consult your site
plans, engineer/designer, or Orenco for more details.
• Pump Off time = (1440 ÷ Cycles per Day) - Pump On Time
Calculate Cycles per Day using the equation below:
NOTES:
- 1440 is the number of available minutes in a 24-hour period.
- The standard Recirc Ratio for AX100 units is 4 but it can
range from 2 to 6, depending on the needs of the system.
- The Pump Flow Rate is 48 gallons per minute (3 L/sec) when
nozzle pressure measures 3.0 psi (20.6 kPa).
2.
Discharge Timer Settings (Timed Dose Systems) :
The timer
settings for the system are calculated based on the actual and
expected flow. Equations are provided below.
a. Identify Dose Volume
• Dose Volume = Number of gallons desired per dose
or
• Dose Volume = (Number of Orifices) × (Loading Rate per Orifice)
b. Identify Doses per Day
• Number of doses per day = (Design Flow) ÷ (Dose Volume)
c. Identify Time Interval Between Starts, in hours
• Time Interval Between Starts = (Hours per Day) ÷ (Doses per Day)
d. Identify Time On, in minutes
• Time On = (Dose Volume) ÷ (Measured Pump gpm)
Inspection Points (continued)
(Average Daily Flow) × (Recirc Ratio)
(Pump Flow Rate) × (Pumps per Dose) × (Pump On Time)
