DEMA Flex Flow User manual

Quick Start Guide for
Flex Flow Pump
DEMA Ag 0960.A

Installation
The Flexflow Pump is prewired for easy installation. Select a secure horizontal surface
that is convenient to the electrical and plumbing connections that is accessible by the
operator. Do not install pump in a location where the ambient temperature exceeds
120°F (50°C).
The pump is suitable for most outdoor installations, shielding from direct exposure to
the elements is recommended. The properties of the solutions to be metered should
also be considered concerning temperature changes and effects to the poly tubing.
Pump

Installation
pH Probe Injection Valve

Installation
Foot valve

Installation
Completely installed

Setup/Programming
Front Panel Description
1x16-backlit LCD display
On/Off Power indicator light Pulse or Stroke indicator light
Up and Down arrows for
setting adjustments
Enter Key to save adjustments
Menu key to enter and exit
pump setup

Setup
Priming – Plug in pump and set stroke knob to 100%
(To avoid damage to the pump, this adjustment should only be
made while pump is running at a high stroking rate.)
If fluid begins moving up suction line while pump is operating
No further priming is required.
If fluid is not moving, open bleed valve approximately 1 turn
Until fluid begins to move. When suction line fills, close bleed
valve.
Do not over tighten bleed valve. Damage my occur
Priming

Setup
Control Mode Options
OFF – The OFF control mode will stroke the pump at a user defined rate.
From 0-125 strokes per minute or per hour. Click here for programming
pH Control – The pH control mode will allow the pump to stroke proportionately
based on high and low pH set points. This will allow the pump to stroke faster
as the pH reading moves away from the desired control level and slower as it
gets closer to it. Click here for programming
pH/Flow – The pH/Flow control mode uses a multiply/divide feature as a part of
the programming that allows for an incoming dry contact pulse (such as from a
water meter) to dictate how many times the pump will actually stroke.
For example, setting the “Multiply” to 5 means that a single incoming pulse
from the water meter indicates to the pump that it needs to multiply that
by 5, which would cause the pump to stroke 5 times per dry contact pulse that it
receives.
If the pump is was set in “Divide” that signal by 5, then it would require receiving 5
dry contact pulses from the water meter before the pump would stroke once.
Click here for programming

Setup
All Flex Flow pumps are factory calibrated. The reading should be verified for accuracy
and adjusted as per the instruction.
One Point Calibration – Units can be one point calibrated by leaving the cleaned probe,
on-line sensing in a known pH or ORP fluid* then entering that value in the calibration
screen.
See instruction manual for more calibration options.
Warning:
•Do not allow probe to become dry! Damage will occur and a new probe may
be needed.
•Probes typically last 6-18 months depending on installation and care
Calibration
* -

Programming
OFF Mode
1. Control = OFF press ENTER
2. OFF Strokes/ (Use UP and DOWN arrows to toggle between Min/Hr) press ENTER
3. Use UP and DOWN arrows the change the numbers and ENTER to change position*
4. Press ENTER to return to Control
5. Press Menu to Save Settings
* - (125 Strokes Max)
This function uses the External Stop wire to start and stop the pump.
The External Stop wire can be wired to most types of switches. (Pressure, Toggle…)

Programming
pH Mode
1. Press Menu
2. Use arrows to change Control to pH press Enter
3. Calibrate use arrows to select Yes or No. If you already know your pH select No*
4. Low pH – use arrows and Enter button to enter the low pH setting
5. Low Strokes – use arrows and Enter button to enter number of strokes
6. High pH – use arrows and Enter button to enter the High pH setting
7. High Strokes – use arrows and Enter button to enter number of strokes
8. High Alarm – use arrows and Enter button to enter high pH setting to alarm
9. Low Alarm – use arrows and Enter button to enter Low pH setting to alarm
10. Limit – use arrows and Enter button to set time for alarm limit.
11. Reset Lmt – use arrows and Enter button to set the time before the Alarm Limit Resets.
* - See manual for complete Calibration Instructions.

Programming
pH /Flow
1. Press Menu
2. Use arrows to change Control to pH/Flow press Enter
3. Calibrate use arrows to select Yes or No. If you already know your pH select No*
4. Mode: Multiply/Divide Use arrows and Enter button to select Multiply or Divide
5. Multiply or Divide – use arrows and Enter button to set number to multiply or Divide by**
6. Low pH – use arrows and Enter button to set the low pH level
7. Low Strokes – use arrows and Enter button to enter number of strokes
8. High pH – use arrows and Enter button to enter the High pH level
9. High Strokes – use arrows and Enter button to enter number of strokes
10. High Alarm – use arrows and Enter button to enter high pH setting to alarm
11. Low Alarm – use arrows and Enter button to enter Low pH setting to alarm
12. Limit – use arrows and Enter button to set time for alarm limit.
13. Reset Lmt – use arrows and Enter button to set the time before the Alarm Limit Resets.
* - See manual for complete Calibration Instructions.
** - Multiply function takes a single pulse from the water meter and allows you to multiply the
Strokes. If you multiply by 5 then the pump will stroke 5 times per pulse from water meter.
Divide function takes a single pulse from the water meter and allows you to divide the strokes.
If you divide by 5 then it will take 5 pulses from the water meter before the pump comes on.

Maintenance
Cleaning the pH Probe
1. Disconnect probe leads from the pump
2. Remove probe from pipe
3. Inspect the end of the probe for build up and contaminates
4. Use a spray cleaner (409) on the end of the probe. Let is soak
5. DO NOT WIPE THE END OFF THE END OF THE PROBE! This can damage the membrane of the probe!
6. Recalibrate
7. Re-install into the system.
A well maintained pH probe should last 12-16 months.