Direct Flush Discreet
The DFA (Direct Flush Accessible) and DFD (Direct Flush Discreet) infrared sensor controlled urinal valves are replacements for the previous Direct Flush product.
What is the difference between the Direct Flush Accessible and the IRC?
The Direct Flush Discreet (and the Direct Flush Accessible) is a valve that is allows direct mains flushing of a urinal bowls without the requirement for an auto-flushing cistern. It controls the water flow to the spray head of the urinal. The IRC on the other hand is for an auto-flushing cistern based system; it controls the water inlet into the cistern.
What is the minimum and maximum working pressure?
The Direct Flush valve will safely operate between 0.5 and 6 bar inlet pressure, however depending on the design of the plumbing system and the urinal spray heads, most effective flushing may be obtained at a narrower range. Generally 3-4 bar is a suitable pressure for a rimless urinal with a sparge.
Can the lens be repaired if it is vandalised?
Yes, it may be possible to polish out the scratches depending on the level of damage. Using a very lightly abrasive polishing fluid, such as Brasso, the lens can be brought back to a smooth finish.
How do I know if the sensor activation range is suitable and how do I adjust it?
In order to find the activation range, stand in front of the sensor lens. If the sensor detects your presence it will flash once every 3 seconds. You can check the range by moving closer or further away from the sensor. If you feel that the range is not correct you have two options for changing it: either manually or via the remote control Infrared Configuration Unit (ICU) which comes with user instructions.
Manual adjustment is as follows: disconnect the power supply for 5 seconds and reconnect. Tip: make sure that the sensor is not pointing at any close objects when the power supply is reconnected.
When the sensor flashes amber place your hand 10cm from the sensor, (the amber flashing changes to a green flashing) keep your hand there until the sensor shows a constant green then remove your hand. The unit has now entered Configuration Mode. When the sensor shows a Single red flashing, place your hand in front of the sensor. A slow green flashing will be seen. Move your body to the distance from the sensor to where you would like to set the maximum range.Wait at this position for 8 seconds until the LED glows a constant green. Step away from the sensor and wait for all flashing to stop.
How do I know if my flush time is suitable and how do I adjust it?
In order to ensure adequate flushing and maximum water
savings, the flush should deliver enough water to renew the
water in the trap. Standard traps can have a volume of up to
500ml. Note for siphonic traps: the flush time should be suitable to set up the siphonic action of the trap – this will depend on
your waste pipework.
If you feel that the flush time is not correct you have two options for changing it: either manually or via the remote control Infrared Configuration Unit (ICU) which comes with user instructions.
Manual adjustment is as follows: disconnect the power supply for 5 seconds and reconnect. Tip: make sure that the sensor is not pointing at any close objects when the power supply is reconnected.
When the sensor flashes amber place your hand 10cm from the sensor, (the amber flashing changes to a green flashing) keep your hand there until the sensor shows a constant green then remove your hand. The unit has now entered Configuration Mode. Now wait until the sensor shows a double red flashing, and place your hand in front of the sensor. The water will start to run and a green flashing will be seen. When the water has run for the desired period of flush,move your hand out of the line of sight of the sensor. The water will cease to flow, and the flush time will be set. Step away from the sensor and wait for all flashing to stop.
The valve is not working, what is wrong?
If the sensor is flashing red slowly or not at all when you stand in the sensing area it is likely that your batteries are dead and need to be replaced. If the sensor shows normal operation (one flash every 3 seconds when you stand in the sensing area) there may be something wrong with the valve or the supply pressure has dropped below 0.5 bar.
The urinal is fitted with a siphonic trap, can I use a Direct Flush?
Yes, the Direct Flush is compatible with siphonic traps. To activate the siphonic trap refill function the ICU remote control is required. Follow instructions in the ICU User Guide.
What happens if the urinal is not used for a long period? Will it not smell?
The Direct Flush has a 12hr hygiene flush function which is on by default. This keeps the trap replenished in long periods of non use by flushing once every 12hrs.
If the sensor is flashing red slowly or not at all when you stand in the sensing area it is likely that your batteries are dead and need to be replaced. If the sensor shows normal operation (one flash every 3 seconds when you stand in the sensing area) there may be something wrong with the valve or your water supply. Ensure that all stop cocks are turned on and that you have a good pressure at the valve.
Other Alarms
Constant red flashing: faulty wiring or solenoid coil. Red flash twice every 3 seconds: sensor covered or heavily scratched.
Installation information discreet [PDF document]
Cost savings
