Clarus ZF-450 Instrukcja obsługi - Strona 10

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RECIRCULATION FLOW ADJUSTMENT

The recirculation flow is designed to be 1.2-1.8 times

that of the average design inflow. Table 4 indicates

starting flow rates for each unit. However, fine

adjustments may be necessary to ensure optimum

performance.

Setting the flow rate:

• Adjust the flow using rates in Table 4.

• The flow rate is adjusted by rotating the gray

recirculation valve (2) and observing the flow at the

pipe end.

• There are prescribed lines at the outlet of the

recirculation pipe to aid in approximating the correct

flow.

Measuring the flow rate:

• The actual flow rates must be measured to verify

flow after adjustment of the valve and observation

at the pipe end.

• Measure the time in seconds required to fill a 1L

container.

• Compare the time to value ranges in Table 4.

• If necessary, adjust the valve again and collect

another sample to verify the correct flow rates.

It is important not to set the flow rate too high

because it can cause excessive agitation within the first chamber

(Sedimentation Chamber). This could result in poor performance.

Table 4

- Recirculation Flow Rates

Model

Recirculating flow rate (sec/liter)

Suggested Valve Opening

Figure 14

- Flow

Measurement

RECIRCULATION OR BACKWASH PIPE

CONTAINER

FAUCET

BACKFLOW PREVENTER

BLOWER

ZF450

ZF800

29-45

14-22

35-40%

30-35%

RECIRCULATION OR BACKWASH PIPE

CONTAINER

HOSE

CLAMP

BRUSH

G.L

BACKWASH FLOW ADJUSTMENT

In order to prevent plugging of the media in the

aeration chamber, the backwash cycle activates

at a preset schedule. If there is no backwash cycle

or if the backwash cycle is too short, the unit's

performance will be adversely affected. Likewise, if

the backwash cycle is too long, performance will be

compromised.

The backwash cycle begins at 2:00 AM and lasts for

five minutes. One hour later, another five minute

backwash cycle occurs. The backwash initiation

time can be set for any time during a 24-hour period

to accommodate unusual water use patterns. The

goal is to set the time when there is no flow into the

unit.

The backwash cycle and sludge transfer from the

aeration chamber takes place in the same action.

Verify that the air flow is uniform across the

aeration chamber during a backwash cycle. If not,

adjust the red backwash valve (3) accordingly.

Setting the flow rate:

•

On all HIBLOW HP series model blowers, press

the [MINUTE] button for at least 2 seconds to

switch to manual mode. The "aeration" and

"backwash" can be switched by the [MINUTE]

button.

•

Set the backwash flow rate by adjusting the

gray sludge transfer valve (4). Use Table 5 to

determine the setting for each Fusion

Measuring the flow rate:

•

Measure the actual backwash flow rate at the

outlet of the sludge return pipe in the first

chamber the same way the recirculation flow rate

is measured.

•

Adjust the gray sludge transfer valve (4) if

necessary to obtain the proper flow.

•

Be sure to press [SET] to return the unit back to auto

mode on HIBLOW Unit.

Table 5

- Backwash Flow Rate Setting

Model

Frequency

Backwash flow

Twice/day

rate (sec/liter)

Valve open (%)

Twice/day

Figure 15

- Flow

Controlling Valve

model.

ZF450

ZF800

7-10

4-6

50-55%

40-45%