Nova-Tech LMI Series HH Metering Pump - Manual (Page 36)

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13.2.5 Menu Items 7, 8 and 9 Activate the Integral
Blowdown Feature
These Menu Items will require additional accessories and customer
supplied components.
This Integral Blowdown feature provides cooling tower control from
your LMI microprocessor pump when used in conjunction with a
pulse output type flowmeter (batch mode) or 4-20 mA signal
(milliamp mode). These signals can then be input into the pump to
provide activation of both the pump and a customer supplied solenoid
valve.
LMI's Relay Pack, Model RP-100A, must be ordered separately
to provide power to the customer supplied solenoid.