Programming the W-PFS

Automatic Screen and Timer Programming

Note: Please ensure you have set the time and date on the main page before proceeding. S

The programming screen utilises buttons to set the days and weeks to run, plus a start time and duration.

1). Select days to run
First use the buttons for the days of the week (top left) to select which days you would like the system to run. In the above example, Monday to Friday have been selected, Saturday and Sunday have not. Press the day to either select or deselect it; the machine will only run on selected days/weeks.

2). Select weeks to run
Next using the numbered buttons (1-5) top right to choose the weeks of the month to run on. If all are selected, the system will run on every week. In the above example, 1, 3, 4 and 5 are selected, week 2 is not.

3). Choose a start time

Press the start time and a new window pops up. This allows you to enter a start time (24hr clock, 00:00 to 23:59). If an invalid time has been selected, the system will automatically default to the nearest valid time.

4). Choose a run time duration
Next press the duration time, a new window will pop-up. This allows you to select the duration the system will run for. This can be any duration from 00 hrs 01 mins to 99 hrs 59 mins.

 5). Enable or disable the mode
So far, in this example, we have set the system to run Monday to Friday, the 1st, 3rd, 4th and 5th week of every month, starting at 9am and running for 8 hours (i.e. stopping at 5pm). However, the system will only run in automatic mode if we enable the mode. Press the enable or disable button to suit your requirements

The on screen (?) button brings up a help screen which also gives additional assistance.

Once you have completed your setup, press the HOME button to return to the main screen.

How long and how often to run

Each installation may require a different calculation as to how long you will need to run your system for. However, the following guide should help you to get a good basic setup. Periodic monitoring of the system’s performance, along with 6 monthly fuel sampling, will allow you to adjust your setup should you feel your fuel quality needs to be better managed.

We recommend ensuring your fuel is cleaned every 1 to 2 weeks. That means ensuring your system is running for sufficient time to clean your fuel in that period. A basic calculation can be achieved using the following factors.

• How large is your fuel tank (in litres)?
• What speed does your fuel polishing system run at?

For example, a 25,000 lit fuel tank and a W-PFS-026, which runs at 26 lit/min would use this basic calculation (assuming there are no large lift/head considerations).

To calculate your run time, in hours*

Size of fuel tank (litres) divided by 60 + 20% 25000 /60 +3.2 = 19.2
System flow rate 26

*assumes minimal fuel lift/head and minimal 90-degree pipework bends and other restrictions which may cause a system to slow down. If your system has a limited maximum flow due to external factors, please adjust your cleaning times to match.

In the above example, we have a time of 19.2 hours; approximately 9 hours, 15 minutes.

We want to run the system for that duration, over a 1 week period, so if we divide that time by 7 (days) we could work out a regular run time for daily use. 19.2/7=2.75 hours (2 hours 45 mins).

In other words, in this basic example, if we set our system to run every day, and every week for 2 hours 45 minutes, we would achieve the basic desired setup.

Starting at 9am is not important, indeed the start time can be scheduled to suit the customer’s needs, but it is WASP’s opinion that running for a short period every day is better than running once per week.

If contamination appears in the tank, for example, water from poor venting, or poor fuel delivery, running daily means increasing the likelihood of detection/removal rapidly; whereas running once per week could mean contamination is left in the fuel for a significantly longer time.

Some installations may require longer running, or different schedule times. It is the installer’s and operator’s responsibility to ensure adequate run time has been allocated. WASP also recommends periodic fuel testing to ensure sufficient run time has been allowed. Increase the frequency/run time if it is felt the fuel quality needs to improve.
 
To help further, we have prepared these timing charts based on the calculations on the previous page. This is a rough guide for running time, assuming minimal lift/head of fuel.

Note
This is the calculated running time per 1 to 2 week period.
For example and as per the chart below, a 10,000 lit tank with a 10 lit/min system would need to run for 20 hours in 1 to 2 weeks.