Little Giant EC-1-DV Manual page 2

EC-1-DV
Introduction
This instruction sheet provides you with the information required to safely own and operate your Little Giant pump. Retain
these instructions for future reference.
The Little Giant EC-1 pump series comprises the following models: EC-1, EC-1-DV, EC-1K, and EC-1K-DV. The EC-1 and EC-1K
models include a variety of pumps to accommodate varying electrical requirements (i.e. voltage and frequency) while the
EC-1-DV and EC-1K-DV accommodate multiple electrical requirements within one pump. The "DV" suffix indicates a pump
model that senses the application's voltage and frequency (within the rated range), then automatically adjusts internally to
maintain pump performance.
The entire EC-1 Series of pumps (hereafter referred to as "EC-1") are automatic condensate removal systems designed to
remove the water from a ductless mini-split air conditioner evaporative coil when gravity-feed drainage is not possible or
practical. Even where gravity drainage is possible, the EC-1 may be a better choice, minimizing the opportunity for property
damage due to a clogged or air-locked gravity drain line. Additionally using the EC-1 allows the placement of the indoor air
handler anywhere in the room, not just located on an outside wall, to take advantage of gravity draining of condensate to
the outside.
The EC-1 pump is only suitable for intermittent use in applications with a maximum 50% pump duty cycle and maximum 3-
minute pump ON cycle. To maintain a maximum 50% duty cycle, the pump must have at least twice the flow rate of the
condensate produced at the head required by the application.
The EC-1 is suitable for most ductless mini-split A/C units up to 34,000 BTU/hr, but the amount of condensate produced by
an air conditioner is dependent on the properties of the inside and outside air and the characteristics of the air conditioner
used. Check with the air conditioner manufacturer for the amount of condensate that will be produced for a given
application. Make certain that you have determined that the flow rate of the EC-1 is enough to remove the condensate
during the most severe temperature conditions. See performance curve for typical pump flow rate and maximum amount
of condensate that can be removed for any given discharge head. Failure to consider this could result in overflowing of
water from the condensate pump reservoir.
The EC-1 consists of two main parts, the water collection reservoir and control unit/pump. The water collection reservoir is
to be positioned near the bottom of the air handler. The control unit/ pump can be affixed internal or external to the air
handler.
The EC-1 operates automatically when condensate water drains into the reservoir by gravity. The reservoir contains
switches controlled by a float that rises and falls depending upon the amount of water inside the reservoir. As water enters
the reservoir, a float rises and causes a switch to activate the pump. As the pump empties the reservoir, the float lowers
and causes a switch to deactivate the pump when the reservoir is almost empty. A small amount of water always remains
in the reservoir after each pump cycle.
The reservoir also includes a filter screen that should be inspected periodically and cleaned when necessary. Failure to
inspect and clean the filter screen may result in blockage inside the reservoir resulting in water overflowing from the
reservoir.
The pump also includes an overflow protection switch circuit that can be connected to stop the air conditioner equipment
if the pump is unable to empty the reservoir. This feature should be used as it can prevent property damage due to
overflowing water from the air conditioner. The use of this feature is described in detail below under electrical
connections.
The Little Giant pump you have purchased is of the highest quality workmanship and material, and has been engineered to
give you long and reliable service.
Little Giant pumps are carefully tested, inspected, and packaged to ensure safe delivery and operation. Please examine
your pump carefully to ensure that no damage occurred during shipment. If damage has occurred, please contact the place
of purchase. They will assist you in replacement or repair, if required.
READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE, OR SERVICE YOUR LITTLE GIANT
PUMP. KNOW THE PUMP'S APPLICATION,