Pump Output: (also see Pump Start / Stop: page 10)
The TD-4000 has two Pump Output controls and works as follows:
If used for Black or Grey you can turn it ON and OFF manually. If the pump is ON will turn OFF automatically
when the tank is empty or at the programmed Pump Stop Point.
If used for Water you can turn it ON and OFF manually. If the pump is ON it will turn OFF automatically when
the tank reaches the programmed low alarm point or at the programmed Pump Stop Point.
If used for Fuel you can turn ON and OFF manually. If the pump is ON it will turn OFF automatically when the
tank is full or at the programmed Pump Stop Point.
If a tank type has been programmed as a Day Fuel (see Step 4) the Output will automatically turn ON at the
programmed Pump Start Point and turn OFF when the tank is full or at the programmed Pump Stop Point. If
the Pump key is pushed during the automatic pumping the pump will stop and the Day Tank feature will be
placed into manual mode Pushing the pump key again will start the pump again and place it back into
automatic mode.
Special Pump:
If the Black tank has a charcoal filter fitted and you are using a pressure sensor you will need to use this
feature.
Explanation: When the pump is turned on liquid is removed from the tank quicker than air can replace it due
to the constrictive nature of the air filter. This will cause a pressure drop, the system will think the tank is
empty and turn the pump off.
The Special Pump feature will allow the pump to run for a pre-set time without looking at the tank level (which
will be wrong due to the above reason), the pump will then turn Off for 20 seconds allowing the tank to
equalize its pressure. The system will then look at the tank level and turn the pump back On for a time
period. This time will be based on the tank level e.g. If the tank level is low, the time period will be short. This
will continue until the tank is empty.
If this feature is selected then, when the pump is On, the display will show ------PUMPING------.
When the pump is Off, during the equalizing time, the display will show ------EQUALIZING------.
Scroll down to “Special Pump” and press the Pump key.
The display will now show:
Press the Scroll key to select “Yes” or the Backlight key to select “No”.
If No is selected the feature will not be turned on and the system will return to the Set-Up Menu.
If Yes is selected, The display will now show:
This is the time period the pump will run (if full) before looking at the tank level.
Either Default or Set maybe selected.
If “Default” is selected the time period will be set to 3 minutes and the system will return to the Set-Up Menu.
If “Set” is selected, The display will now show:
Use the Scroll Key to scroll through the times 1 to 5 minutes. Press the Pump key to enter. The system will
now return to the Set-Up Menu.
