(3) Connect the air/water utility "flush/purge" hose to the flushing
adapter. Insert into hypochlorite tank opening and open the "flush/purge"
(4) Turn on the distribution pump and flush out the hypochlorite
tank. Close drain and partially fill tank. Then turn off the distribution
(5) Start the chemical pump. Note the speed and stroke settings and
reset the speed to 80 and stroke to 100.
(6) Flush for two to five minutes. Remove the flush/purge hose and
reset the pump speed and stroke controls to original settings.
chemical pump and the open the tank.
(7) The polyelectrolyte and sequestrant systems do not need to be
flushed. However, these tanks should be drained prior to moving the ROWPU
or if the shutdown will exceed 24 hours.
d. Have the crew air purge the system.
(1) Open the product shut-off valve and disconnect the flush/purge
hose from the flushing adapter. Connect the flush/purge hose to the utility
connection. Partially open the hose valve and dry out the chemical tubing
for two minutes, then close the hose valve.
Disconnect the flush/purge
During the two minutes, crack open the backwash hypochlorite pump
vent valve until all the water is out. Close the product shut-off valve.
(3) Have the crew secure the equipment. Open all the drain valves,
except those at the RO vessel.
When the ROWPU will be shut down for more than three days, use the
procedures for "shutdown to long-term secured status".
Ensure that 1,400
operation PMCS when appropriate. Have your crew perform the following:
a. Clean-up the unit.
Use the product utility hose to wash down the
ROWPU floor with product water while the unit is still producing water.
Clean-up inside the ROWPU, as time permits, during shutdown procedures.
b. Backwash the media filter but do not forward flush the media filter.
Water flush the hypochlorite system. When the water flush is complete, add
water as needed to leave 9 gallons in the tank.