Hoshizaki ROX-20TA-U Instruction Manual page 31

* Acid and Alkaline Water Discharge Outlet is 1/2" MPT.
Note: The vertical length of the pipes for electrolytic water should be a maximum of 80". The
electrolytic water may not be able to flow or the flow rate may not be maintained if the
piping length is outside of this range. Install the piping to the Water Tank so that the
outlets are located above the unit. The difference in the gas amount between acid
water and alkaline water may change the flow rate balance and cause poor
performance. Use unions between the pipes and the unit so that the hoses can be
removed from the unit easily. See Fig. 27.
* Be sure to install vent pipes on the piping for electrolytic water.
Note: Use 1/2-3/4" pipes for vertical piping and 3/4" for horizontal piping and vent piping.
This can reduce the influence of scale in the alkaline water pipe and help stabilize the
amount of alkaline water to generate. Also be sure to have about 5/100 pitch
(downward) for horizontal piping. See Fig. 27.
* Be sure to install PVC or acid and alkaline resistant inspection valves on the vertical piping
to measure acid and alkaline water. See Fig. 27.
Inspection Valve
3/4" Downward
Pipe
Install the piping to
the Water Tank so
that the outlets are
located above the
unit.
1/2-3/4" Vertical Pipe
* Be sure to install overflow pipes and drain
pipes on the Water Tanks.
Note: Use 3/4" overflow and drain pipes.
Install traps on the overflow pipes and/
either PVC or acid and alkaline
resistant shut-off valves on the drain
pipes. See Fig. 28. Locate the
overflow pipes so that they will be
located above the Float Switches on
each Water Tank.
3/4" Horizontal Pipe
Union
27
3/4" Vent Pipe
Inspection Valve
3/4" Overflow Pipe
Acid
Water Tank
Trap
Pitch: 5/100
Vertical piping
length:
Maximum 80"
Fig. 27
Alkaline
Water Tank
Shut-off Valve
Fig. 28
3/4" Drain
Pipe