Installation Guide UNO UL 110v V1.1

Water pressure & flow rate
DDC Dolphin Ltd macerators are fitted with an integral water tank, using an air gap between the
inlet valve and the top of the tank; this ensures the water used in the machine is isolated from the
client’s incoming water supply. Water is extracted from the tank and replenished throughout the
cutting cycle. The incoming water pressure and flow rate must be sufficient to re-fill the tank, poor
water pressure or low flow rate may cause the pump to run dry, damage to the pump and provide
poor cutting or flushing within the machine.
Water pressure 1 bar (minimum) 6 bar (Maximum)
Water flow rate
12Litres @ 1 bar (minimum)
If there is strong water pressure the water supply to the machine should be controlled by restricting
the flow of water. The water inlet solenoid inside the machine should open only once or twice
throughout the cycle and close 5-10 seconds after the cycle is complete. Adjustments to the water
isolator and or flow restrictors can be used to control the rate at which the water tank refills.
Restricting the flow of water will eliminate “water hammer” when the inlet valve opens and closes
repeatedly.
DDC Dolphin Ltd. macerators are fitted with a flexible hose for the water inlet, this ensures any
vibration from the machine will transfer and weaken the incoming water supply. These machines
are not designed to have a rigid copper or plastic pipe water supply.
Copyright © 2015 DDC Dolphin Ltd Page 17 of 36 November 15 IGUL-UNO-V1.1