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INTRODUCTION
The MT-300 is a microprocessor controlled timer which can be programmed to operate at any time during the day or
night. It can be powered by 12 VDC from batteries, or 24 VAC from a step-down transformer, for operation. Options
are available to control one or two pumps. A few examples of typical applications are; grease traps, drains, odor
control, cooling towers, chain lube systems, and water treatment.
The MT-300 can be programmed for up to 20 separate “pump events“. The pump(s) can run for a maximum of 16
minutes on each pump event. Some of the key features of the MT-300 are:
•
An on-board battery keeps the current time setting if main power is removed.
•
Non-volatile memory saves all programmed event information if main power is removed.
•
A security feature is built-in to prevent accidental, or unauthorized programming.
This manual is laid out to cover all operations and features of the MT-300 board. As a result, some information may
not pertain to your particular use of the MT-300. If this manual was included as part of a complete dispensing
system, all wiring connections from the pump(s) to the MT-300 will already be in place.
INSTALLATION
(1) a: If this manual was included as part of a complete dispensing system, mount the unit on a wall using the
supplied mounting bracket (customer must supply hardware to install). Mount the unit in a convenient location
near both injection point and chemical supply. CAUTION: Do not mount the unit in the direct path of steam. This
can short circuit and permanently damage your system.
b: If this manual was not included as part of a complete pumping system, mount the MT-300 into the dispenser
using the 3 mounting holes in the board.
(2) Connect batteries or power wires and all electrical wiring as shown in the attached wiring diagram and per local
electrical codes. Failure to do so will void warranty.
(3) Install poly tubing between the discharge (right) tube side of the peristaltic pump and the injection point. Use tie
wraps to secure flow tubing to squeeze tube. Be sure to draw the tubing through the end of the pickup tube.
(4) To fill the suction and discharge tubing connected to the pump, depress the appropriate PRIME switch and the
pump will run as long as the switch is depressed.
CONVERTING POWER SOURCES
See the wiring diagram in this manual for correct wiring connection when converting from AC to DC power (or vice
versa). Be sure to locate the fuse in the correct position.
OPERATION NOTES
•
During normal operation, the clock will display briefly when an event run time starts, or while PRIME buttons are
pressed. This greatly increases battery life for (12 VDC) battery-operated applications.
•
During programming, if a button is not pushed within 2 minutes, the display will disappear and the control will
return to normal operation.
