System Regeneration Cycles; Installation - Hellenbrand 3000 Series Service Manual

SYSTEM REGENERATION CYCLES

1. Service (Downflow):
Untreated water is directed down through the resin bed
and up through the riser tube. The hardness ions attach
themselves to the resin and are removed from the water.
The water is conditioned as it passes through the resin bed.
2. Backwash (Upflow):
The flow of water is reversed by the control valve and
directed down the riser tube and up through the resin bed.
During the backwash cycle, the bed is expanded and debris
is flushed to the drain.
3. Brine/Slow Rinse (Downflow):
The control directs water through the brine injector and
brine is drawn from the regenerant tank. The brine is then
directed down through the resin bed and up through the
riser tube to the drain. The hardness ions are displaced
by sodium ions and are sent to the drain. The resin is
regenerated during the brine cycle. Brine draw is completed
when the air check closes.
SERVICE BACKWASH
C0 C1 and C6

INSTALLATION

All plumbing must conform to local codes.
Inspect unit carefully for carrier shortage or shipping damage.
Location Selection
1. The distance between the unit and a drain should be as
short as possible.
2. If it is likely that supplementary water treating equipment
will be required, make certain adequate additional space is
available.
3. Since salt must be added periodically to the brine tank, the
location should be easily accessible.
4. Do not install any unit closer to a water heater than a total
run of 10 feet (3 m) of piping between the outlet of the
conditioner and the inlet to the heater. Water heaters can
sometimes overheat to the extent they will transmit heat
back down the cold pipe into the unit control valve.
6 • Autotrol ® 255 Valve / 400 Series Controls Service Manual SE12
From Regenerant
Tank
REPRESSURIZE
BRINE/SLOW RINSE
C2 and C3
Figure 3
4. Fast Rinse (Downflow):
The control directs water down through the resin bed and
up through the riser tube to the drain. Any remaining brine
residual is rinsed from the resin bed.
5. Brine Refill (Downflow):
Brine refill occurs during a portion of the fast rinse cycle.
Water is directed to the regenerant tank at a controlled rate,
to create brine for the next regeneration.
6. Repressurize Cycle — (No Flapper Open):
This cycle closes all flappers for a short time to allow the
air and water to hydraulically balance in the valve before
continuing the regeneration.
FAST RINSE
C4 C5 and C7
Hot water can severely damage the conditioner. A 10-
foot (3-m) total pipe run, including bends, elbows, etc., is
a reasonable distance to help prevent this possibility. A
positive way to prevent hot water from flowing from heat
source to the conditioner, in the event of a negative pressure
situation, is to install a check valve in the soft water piping
from the conditioner. If a check valve is installed, make
certain the water heating unit is equipped with a properly
rated temperature and pressure safety relief valve. Also,
be certain that local codes are not violated.
5. Do not locate unit where it or it's connections (including
the drain and overflow lines) will ever be subjected to room
temperatures under 34°F (1°C) or over 120°F (49°C).
6. Do not install unit near acid or acid fumes.
7. The use of resin cleaners in an unvented enclosure is not
recommended.
To Regenerant
Tank
BRINE REFILL
C8