Hanna Instruments BL Series Pumps - Manual (Page 11)

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OPERATIONAL GUIDE
START-UP
At start-up, purge all chemical gases and air
from the suction tubing, valves and pump
head. Start the pump.
When all the air or gas is vented, the solu-
tion being metered will appear in the output
line.
Note: Only when operating under pressure,
the pump must be started unloaded.
An external Flow Rate
Control (potentiometer) on
the face of the pump al-
lows to adjust the flow up
to 100% of the pump's
rated capacity.
A LED indicator will light up each time a
stroke begins.
Uphill Installation
Suggested installation
whenever the supply is
located higher than the
discharge point; typi-
cally a waste water ap-
plication.
It is important to in-
stall the Injection valve
to prevent siphoning.
Downhill Installation
Suggested installation when pumping from
one container to another, each at different
levels and with only nominal pressure.