Manual 2100-708A
Page
3 of 17
GENERAL INFORMATION
Unpacking
Upon receipt of the equipment be sure to compare the
model number found on the shipping label with the
accessory identification information on the ordering and
shipping document to verify that the correct accessory
has been shipped.
Inspect the carton housing of each economizer as it is
received, and before signing the freight bill, verify that
all items have been received and that there is no visible
damage (check parts list below). Note any shortages or
damage on all copies of the freight bill. The receiving
party must contact the last carrier immediately,
preferably in writing, requesting inspection by the
carrier’s agent. Concealed damage not discovered until
after loading must be reported to the carrier within 15
days of its receipt.
General
The economizer should only be installed by a trained
heating and air conditioning technician. These
instructions serve as a guide to the technician installing
the economizer package. They are not intended as a
step-by-step procedure with which the mechanically
inclined owner can install the package.
The economizer is shipped in one carton which
contains the electrical harness, miscellaneous hardware
and installation instructions.
Economizer kit includes:
(1) ECON-NC5 ventilator
(1) 910-2017 sensor assembly
(1) 3000-1627 wire assembly
(2) 7003-084 mist filters
(1) 7003-083 exhaust bug screen
(2) 1913-002-0808 8-1/2" foam strips
(4) 1913-002-0708 7-1/2" foam strips
(2) 539-405 intake sealing frames
(2) 543-223 lower block off plates
(12) #10-16x1/2 screws
(4) #8-18x3/8 pan head screws
(1) 2100-708 installation instructions
Economizer Features
• One piece construction.
• Exhaust air damper – built in with positive closed
position. Provides exhaust air capability to prevent
pressurization of tight buildings.
• Actuator motor – 24 volt, power open, spring return
with built in torque limiting switch.
Description
ECON-NC economizers are designed to be used
with the wall mount series air conditioners and
heat pumps, shown in Table 1, equipped with low
ambient controls and field-installed controller. They
are electromechanical economizer systems designed
to provide “free” cooling where the outdoor air
temperature is cool enough to provide the needed
cooling without running the compressor, or in addition
to the compressor.
When cooling is required, the system automatically
takes advantage of cold outdoor air when available and
uses it for first stage cooling. This then reduces the
need to run the air conditioning compressor providing
lower operating costs and increasing the service life
of the equipment. If the outdoor air temperature is
too warm to be sufficient for cooling, the dry bulb
outdoor air temperature sensor detects the condition
and should automatically close the outdoor air intake/
exhaust damper, open the return air damper and switch
to compressor-only operation.
Models
When installed in the models listed on the front page,
the ECON-NC5 provides built-in exhaust provisions.
When the damper blade opens to bring fresh air in, the
damper also opens an exhaust relief. The exhaust air
will flow into the condenser section of the unit. The
condenser fan will help draw exhaust air out when it
is operating with compressor in cooling or heat pump
mode.
Economizer with Exhaust Model Nomenclature
ECON – NC
5
Chassis Size
5
– 5 Ton Models
Economizer
NC –
No Control
